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Oracle® Database PL/SQL Packages and Types Reference
11g Release 1 (11.1)

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76 DBMS_MGWADM

DBMS_MGWADM defines the Messaging Gateway administrative interface. The package and object types are owned by SYS.

Note:

You must run the catmgw.sql script to load the Messaging Gateway packages and types into the database.

See Also:

Oracle Streams Advanced Queuing User's Guide contains information on loading database objects and using DBMS_MGWADM

This chapter contains the following topics:


Using DBMS_MGWADM


Deprecated Subprograms

Oracle recommends that you do not use deprecated procedures in new applications. Support for deprecated features is for backward compatibility only.

The following subprograms are deprecated with Oracle Database 11g Release 1having been superseded by improved technology:


Constants

Table 76-1 DBMS_MGWADM Constants—Cleanup Actions

Name Type Description

CLEAN_STARTUP_STATE

CONSTANT BINARY_INTEGER

Sets the Messaging Gateway agent to a known state so that it can be started

CLEAN_LOG_QUEUES

CONSTANT BINARY_INTEGER

Messaging Gateway agent will clean log queues for all configured messaging system links

RESET_SUB_MISSING_LOG_REC

CONSTANT BINARY_INTEGER

Messaging Gateway agent recovers a Messaging Gateway subscriber that has failed due to a missing log record

RESET_SUB_MISSING_MESSAGE

CONSTANT BINARY_INTEGER

Messaging Gateway agent recovers a Messaging Gateway subscriber that has failed due to a missing persistent source message


Table 76-2 DBMS_MGWADM Constants—Force Values

Name Type Description

FORCE

CONSTANT BINARY_INTEGER

Represents a forced action

NO_FORCE

CONSTANT BINARY_INTEGER

Represents a normal, nonforced action


Table 76-3 DBMS_MGWADM Constants—Logging Levels

Name Type Description

BASIC_LOGGING

CONSTANT BINARY_INTEGER

The standard (the least) information written to the log file

TRACE_DEBUG_LOGGING

CONSTANT BINARY_INTEGER

The greatest information written to the log file

TRACE_HIGH_LOGGING

CONSTANT BINARY_INTEGER

The third level of detail of logging information written to the log file

TRACE_LITE_LOGGING

CONSTANT BINARY_INTEGER

The second level detail of logging information written to the log file


Table 76-4 DBMS_MGWADM Constants—Named Property Constants

Name Type Description

MGWPROP_PREFIX

CONSTANT VARCHAR2

A constant (MGWPROP$_) for the reserved property name prefix

MGWPROP_REMOVE

CONSTANT VARCHAR2

A constant (MGWPROP$_REMOVE) for the reserved property name used to remove an existing property

MGWPROP_REMOVE_ALL

CONSTANT VARCHAR2

A constant (MGWPROP$_REMOVE_ALL) for the reserved property name used to remove all properties


Table 76-5 DBMS_MGWADM Constants—Other Constants

Name Type Description

JMS_CONNECTION

CONSTANT BINARY_INTEGER

Used to indicate that JMS connections will be used to access JMS destinations in a domain-independent manner that supports a unified messaging model

JMS_QUEUE_CONNECTION

CONSTANT BINARY_INTEGER

Used to indicate that JMS queue connections will be used to access JMS destinations

JMS_TOPIC_CONNECTION

CONSTANT BINARY_INTEGER

Used to indicate that JMS topic connections will be used to access JMS destinations

NO_CHANGE

CONSTANT VARCHAR2

Indicates that an existing value should be preserved (not changed). This is used for certain APIs where the desire is to change one or more parameters but leave others unchanged.

DEFAULT_AGENT

CONSTANT VARCHAR2

Name of the Messaging Gateway default agent


Table 76-6 DBMS_MGWADM Constants—Propagation Types

Name Type Description

INBOUND_PROPAGATION

CONSTANT BINARY_INTEGER

Represents the propagation type for non-Oracle to Oracle Streams AQ propagation. The propagation source is a queue in a foreign (non-Oracle) messaging system and the destination is a local Oracle Streams AQ queue.

OUTBOUND_PROPAGATION

CONSTANT BINARY_INTEGER

Represents the propagation type for Oracle Streams AQ to non-Oracle propagation. The propagation source is a local Oracle Streams AQ queue and the destination is a queue in a foreign (non-Oracle) messaging system.


Table 76-7 DBMS_MGWADM Constants—Queue Domain Types

Name Type Description

DOMAIN_QUEUE

CONSTANT BINARY_INTEGER

Represents a queue destination. A JMS queue (point-to-point model) is classified as a queue.

DOMAIN_TOPIC

CONSTANT BINARY_INTEGER

Represents a topic destination. A JMS topic (publish-subscribe model) is classified as a topic.


Table 76-8 DBMS_MGWADM Constants—Shutdown Modes

Name Type Description

SHUTDOWN_IMMEDIATE

CONSTANT BINARY_INTEGER

Represents the immediate shutdown mode

SHUTDOWN_NORMAL

CONSTANT BINARY_INTEGER

Represents the normal shutdown mode


Table 76-9 DBMS_MGWADM Constants—WebSphere MQ Interface Types

Name Type Description

MQSERIES_BASE_JAVA_INTERFACE

CONSTANT BINARY_INTEGER

Represents the Base Java interface for the WebSphere MQ messaging system


Table 76-10 DBMS_MGWADM Constants—target_type Argument of SET_OPTION and REMOVE_OPTION Procedures

Name Type Description

AGENT_JAVA_PROP

CONSTANT PLS_INTEGER

Used for an agent option used to set a Java System property

MSGLINK_OPTION

CONSTANT PLS_INTEGER

Used for a messaging system link option

JOB_OPTION

CONSTANT PLS_INTEGER

Used for a propagation job option


Table 76-11 DBMS_MGWADM Constants—conntype Argument of CREATE_AGENT and ALTER_AGENT Procedures

Name Type Description

JDBC_OCI

CONSTANT VARCHAR2

Used to specify the JDBC OCI driver

JDBC_THIN

CONSTANT VARCHAR2

Used to specify the JDBC Thin driver



Data Structures

The DBMS_MGWADM package defines the following OBJECT types.

Object Types


SYS.MGW_MQSERIES_PROPERTIES Object Type

This type specifies basic properties for a WebSphere MQ messaging system link.

Syntax

TYPE SYS.MGW_MQSERIES_PROPERTIES IS OBJECT (
   queue_manager       VARCHAR2(64),
   hostname            VARCHAR2(64),
   port                INTEGER,
   channel             VARCHAR2(64),
   interface_type      INTEGER,
   max_connections     INTEGER,
   username            VARCHAR2(64),
   password            VARCHAR2(64),
   inbound_log_queue   VARCHAR2(64),
   outbound_log_queue  VARCHAR2(64),

-- Methods 
STATIC FUNCTION construct 
RETURN SYS.MGW_MQSERIES_PROPERTIES,

STATIC FUNCTION alter_construct 
RETURN SYS.MGW_MQSERIES_PROPERTIES );

Attributes

Table 76-12 SYS.MGW_MQSERIES_PROPERTIES Attributes

Attribute Description

queue_manager

The name of the WebSphere MQ queue manager

hostname

The host on which the WebSphere MQ messaging system resides. If hostname is NULL, then a WebSphere MQ bindings connection is used. If not NULL, then a client connection is used and requires that a port and channel be specified.

port

The port number. This is used only for client connections; that is, when hostname is not NULL.

channel

The channel used when establishing a connection to the queue manager. This is used only for client connections; that is, when hostname is not NULL.

interface_type

The type of messaging interface to use. Values:

  • DBMS_MGWADM.MQSERIES_BASE_JAVA_INTERFACE if the WebSphere MQ Base Java interface should be used.

  • DBMS_MGWADM.JMS_CONNECTION if the link is to be used to access JMS destinations in a unified, domain-independent manner.

  • DBMS_MGWADM.JMS_QUEUE_CONNECTION if the link is to be used for accessing JMS queues

  • DBMS_MGWADM.JMS_TOPIC_CONNECTION if the link is to be used for accessing JMS topics.

max_connections

The maximum number of messaging connections to the WebSphere MQ messaging system

username

The username used for authentication to the WebSphere MQ messaging system

password

The password used for authentication to the WebSphere MQ messaging system

inbound_log_queue

The name of the WebSphere MQ queue used for propagation recovery purposes when this messaging link is used for inbound propagation; that is, when queues associated with this link serve as a propagation source:

  • For MQSERIES_BASE_JAVA_INTERFACE, this is the name of a physical WebSphere MQ queue created using WebSphere MQ administration tools.

  • For the JMS_CONNECTION interface and the JMS_QUEUE_CONNECTION interface, this is the name of a physical WebSphere MQ queue created using WebSphere MQ administration tools.

  • For JMS_TOPIC_CONNECTION interface, this specifies the name of a WebSphere MQ JMS topic. The physical WebSphere MQ queue used by subscribers of that topic must be created using WebSphere MQ administration tools. By default, the physical queue used is SYSTEM.JMS.D.SUBSCRIBER.QUEUE.

outbound_log_queue

The name of the WebSphere MQ queue used for propagation recovery purposes when this messaging link is used for outbound propagation; that is, when queues associated with this link serve as a propagation destination:

  • For MQSERIES_BASE_JAVA_INTERFACE, this is the name of a physical WebSphere MQ queue created using WebSphere MQ administration tools.

  • For the JMS_CONNECTION interface and the JMS_QUEUE_CONNECTION interface, this is the name of a physical WebSphere MQ queue created using WebSphere MQ administration tools.

  • For JMS_TOPIC_CONNECTION interface, this specifies the name of a WebSphere MQ JMS topic. The physical WebSphere MQ queue used by subscribers of that topic must be created using WebSphere MQ administration tools. By default, the physical queue used is SYSTEM.JMS.D.SUBSCRIBER.QUEUE.


Methods

Table 76-13 SYS.MGW_MQSERIES_PROPERTIES Methods

Method Description

construct

Constructs a new SYS.MGW_MQSERIES_PROPERTIES instance. All attributes are assigned a value of NULL

alter_construct

Constructs a new SYS.MGW_MQSERIES_PROPERTIES instance for altering the properties of an existing messaging link. All attributes having a VARCHAR2 data type are assigned a value of DBMS_MGWADM.NO_CHANGE. Attributes of other data types are assigned a value of NULL.



SYS.MGW_PROPERTIES Object Type

This type specifies an array of properties.

Syntax

TYPE SYS.MGW_PROPERTIES AS VARRAY (2000) OF SYS.MGW_PROPERTY;

Attributes

Table 76-14 SYS.MGW_PROPERTIES Attributes

Attribute Description

name

Property name

value

Property value


Usage Notes

Unless noted otherwise, Messaging Gateway uses named properties as follows:

The alter list is processed in order, from the first element to the last element. Thus the order in which the elements appear in the alter list is meaningful, especially when the alter list is used to remove properties from an existing list.

The property name and value are used to determine how that element affects the original list. The following rules apply:

See Also:

"The DBMS_MGWADM package defines constants to represent the reserved property names on Table 76-4, "DBMS_MGWADM Constants—Named Property Constants"

SYS.MGW_PROPERTY Object Type

This type specifies a named property which is used to specify optional properties for messaging links, foreign queues, and subscribers.

Syntax

TYPE SYS.MGW_PROPERTY IS OBJECT(
   name  VARCHAR2(500),
   value VARCHAR2(4000),

-- Methods  
STATIC FUNCTION construct    --- (1)
RETURN SYS.MGW_PROPERTY,

STATIC FUNCTION construct(   --- (2)
   p_name   IN VARCHAR2,
   p_value  IN VARCHAR2)
RETURN SYS.MGW_PROPERTY );

Attributes

Table 76-15 SYS.MGW_PROPERTY Attributes

Attribute Description

name

Property name

value

Property value


Methods

Table 76-16 SYS.MGW_PROPERTY Methods

Method Description

construct --- (1)

Constructs a new MGW_PROPERTY instance. All attributes are assigned a value of NULL

construct --- (2)

Constructs a new MGW_PROPERTY instance initialized using the given parameters



SYS.MGW_TIBRV_PROPERTIES Object Type

A type that specifies basic properties for a TIB/Rendezvous messaging system link. The Messaging Gateway agent creates a TIB/Rendezvous transport of type TibrvRvdTransport for each Messaging Gateway link.

Syntax

TYPE SYS.MGW_TIBRV_PROPERTIES IS OBJECT(
   service   VARCHAR2(128),
   daemon    VARCHAR2(128),
   network   VARCHAR2(256),
   cm_name   VARCHAR2(256),
   cm_ledger VARCHAR2(256),

-- Methods
STATIC FUNCTION construct 
RETURN SYS.MGW_TIBRV_PROPERTIES,

STATIC FUNCTION alter_construct 
RETURN SYS.MGW_TIBRV_PROPERTIES );

Attributes

Table 76-17 SYS.MGW_TIBRV_PROPERTIES Attributes

Attribute Description

service

The service parameter for the rvd transport

daemon

The daemon parameter for the rvd transport

network

The network parameter for the rvd transport

cm_name

The CM correspondent name. Reserved for future use.

cm_ledger

The CM ledger file name. Reserved for future use.


Methods

Table 76-18 SYS.MGW_TIBRV_PROPERTIES Methods

Method Description

construct

Constructs a new SYS.MGW_TIBRV_PROPERTIES instance. All attributes will be assigned a value of NULL.

alter_construct

Constructs a new SYS.MGW_TIBRV_PROPERTIES instance. This function is useful for altering the properties of an existing messaging link. All attributes having a VARCHAR2 data type will be assigned a value of DBMS_MGWADM.NO_CHANGE. Attributes of other data types will be assigned a value of NULL.



Summary of DBMS_MGWADM Subprograms

Table 76-19 DBMS_MGWADM Package Subprograms

Subprogram Description

ADD_SUBSCRIBER Procedure

Adds a subscriber used to consume messages from a source queue for propagation to a destination

ALTER_AGENT Procedures

Alters Messaging Gateway agent parameters

ALTER_JOB Procedure

Alters the properties of a propagation job

ALTER_MSGSYSTEM_LINK Procedure for TIB/Rendezvous

Alters the properties of a TIB/Rendezvous messaging system link

ALTER_MSGSYSTEM_LINK Procedure for WebSphere MQ

Alters the properties of a WebSphere MQ messaging system link

ALTER_PROPAGATION_SCHEDULE Procedure

Alters a propagation schedule

ALTER_SUBSCRIBER Procedure

Alters the parameters of a subscriber used to consume messages from a source queue for propagation to a destination

CLEANUP_GATEWAY Procedures

Cleans up Messaging Gateway

CREATE_AGENT Procedure

Creates a Messaging Gateway agent that will be used to process propagation jobs

CREATE_JOB Procedure

Creates a job used to propagate message from a source to a destination

CREATE_MSGSYSTEM_LINK Procedures for TIB/Rendezvous

Creates a messaging system link to a TIB/Rendezvous messaging system

CREATE_MSGSYSTEM_LINK Procedures for WebSphere MQ

Creates a messaging system link to a WebSphere MQ messaging system

DB_CONNECT_INFO Procedure

Configures connection information used by the Messaging Gateway agent for connections to Oracle Database

DISABLE_JOB Procedure

Disables a propagation job

DISABLE_PROPAGATION_SCHEDULE Procedure

Disables a propagation schedule

ENABLE_JOB Procedure

Enables a propagation job

ENABLE_PROPAGATION_SCHEDULE Procedure

Enables a propagation schedule

REGISTER_FOREIGN_QUEUE Procedure

Registers a non-Oracle queue entity in Messaging Gateway

REMOVE_AGENT Procedure

Removes a Messaging Gateway agent

REMOVE_JOB Procedure

Removes a propagation job

REMOVE_MSGSYSTEM_LINK Procedure

Removes a messaging system link for a non-Oracle messaging system

REMOVE_OPTION Procedure

Removes a Messaging Gateway configuration option

REMOVE_SUBSCRIBER Procedure

Removes a subscriber used to consume messages from a source queue for propagation to a destination

RESET_JOB Procedure

Resets the propagation error state for a propagation job

RESET_SUBSCRIBER Procedure

Resets the propagation error state for a subscriber

SCHEDULE_PROPAGATION Procedure

Schedules message propagation from a source to a destination

SET_LOG_LEVEL Procedures

Dynamically alters the Messaging Gateway agent logging level

SET_OPTION Procedure

Sets a Messaging Gateway configuration option

SHUTDOWN Procedures

Shuts down the Messaging Gateway agent

STARTUP Procedures

Starts the Messaging Gateway agent

UNREGISTER_FOREIGN_QUEUE Procedure

Removes a non-Oracle queue entity in Messaging Gateway

UNSCHEDULE_PROPAGATION Procedure

Removes a propagation schedule



ADD_SUBSCRIBER Procedure

This procedure adds a subscriber used to consume messages from a source queue for propagation to a destination.

Note:

This subprogram has been deprecated as a result of improved technology (see CREATE_JOB Procedure), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.ADD_SUBSCRIBER(
   subscriber_id     IN VARCHAR2,
   propagation_type  IN BINARY_INTEGER,
   queue_name        IN VARCHAR2,
   destination       IN VARCHAR2,
   rule              IN VARCHAR2 DEFAULT NULL,
   transformation    IN VARCHAR2 DEFAULT NULL,
   exception_queue   IN VARCHAR2 DEFAULT NULL
   options           IN SYS.MGW_PROPERTIES DEFAULT NULL);

Parameters

Table 76-20 ADD_SUBSCRIBER Procedure Parameters

Parameter Description

subscriber_id

Specifies a user-defined name that identifies this subscriber

propagation_type

Specifies the type of message propagation. DBMS_MGWADM.OUTBOUND_PROPAGATION is for Oracle Streams AQ to non-Oracle propagation. DBMS_MGWADM.INBOUND_PROPAGATION is for non-Oracle to Oracle Streams AQ propagation

queue_name

Specifies the source queue to which this subscriber is being added. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

destination

Specifies the destination queue to which messages consumed by this subscriber are propagated. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

rule

Specifies an optional subscription rule used by the subscriber to dequeue messages from the source queue. This is NULL if no rule is needed. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

transformation

Specifies the transformation needed to convert between the Oracle Streams AQ payload and an ADT defined by Messaging Gateway. The type of transformation needed depends on the value specified for propagation_type.

If NULL, then the Oracle Streams AQ payload type must be supported by Messaging Gateway.

exception_queue

Specifies a queue used for exception message logging purposes. This queue must be on the same messaging system as the propagation source. If NULL, then an exception queue is not used and propagation stops if a problem occurs. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

The source queue and exception queue cannot be the same queue.

options

Optional subscriber properties. NULL if there are none. Typically these are lesser used configuration properties supported by the messaging system.


Usage Notes

See Also:

"Handling Arbitrary Payload Types Using Message Transformations", in Oracle Streams Advanced Queuing User's Guide for more information regarding message conversion and transformation

If the non-Oracle messaging link being accessed for the subscriber uses a JMS interface, then the Messaging Gateway agent will use the Oracle JMS interface to access the Oracle Streams AQ queues. Otherwise the native Oracle Streams AQ interface will be used. Parameters are interpreted differently when the Messaging Gateway agent uses Oracle JMS for JMS connections.

Transformations are not currently supported if the Oracle JMS interface is used for propagation. The transformation parameter must be NULL.

OUTBOUND_PROPAGATION Subscribers

The parameters for a subscriber used for outbound propagation are interpreted as follows:

If the native Oracle Streams AQ interface is used, then a subscriber will be added to the Oracle Streams AQ queue when this procedure is called, whether or not Messaging Gateway is running. The local subscriber will be of the form sys.aq$_agent('MGW_subscriber_id', NULL, NULL).

If the Oracle JMS interface is used, then the Messaging Gateway agent will create a JMS durable subscriber with the name of MGW_subscriber_id. If the agent is not running when this procedure is called, then the durable subscriber will be created the next time the agent starts.

The exception queue has the following caveats:

INBOUND_PROPAGATION Subscribers

The parameters for a subscriber used for inbound propagation are interpreted as follows:

Whether or not a subscriber is needed depends on the requirements of the non-Oracle messaging system. If a durable subscriber is necessary, then it will be created by the Messaging Gateway agent. If the agent is not running at the time this procedure is called, then the creation of the subscriber on the non-Oracle messaging system will occur when the agent next starts.

The exception queue has the following caveats:


ALTER_AGENT Procedures

This procedure configures Messaging Gateway agent parameters.

Syntax

DBMS_MGWADM.ALTER_AGENT (
   max_connections  IN  BINARY_INTEGER DEFAULT NULL,
   max_memory       IN  BINARY_INTEGER DEFAULT NULL,
   max_threads      IN  BINARY_INTEGER DEFAULT NULL,
   service          IN  VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE );
DBMS_MGWADM.ALTER_AGENT (
   agent_name      IN   VARCHAR2,
   username        IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   password        IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   database        IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   conntype        IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   max_memory      IN   PLS_INTEGER DEFAULT NULL,
   max_threads     IN   PLS_INTEGER DEFAULT NULL,
   service         IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   initfile        IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   comment         IN   VARCHAR2  DEFAULT DBMS_MGWADM.NO_CHANGE );

Parameters

Table 76-21 ALTER_AGENT Procedure Parameters

Parameter Description

max_connections

The maximum number of messaging connections to Oracle Database used by the Messaging Gateway agent. If it is NULL, then the current value is unchanged.

Caution: This parameter has been deprecated.

max_memory

The maximum heap size, in MB, used by the Messaging Gateway agent. If it is NULL, then the current value is unchanged.

max_threads

The number of messaging threads that the Messaging Gateway agent creates. If it is NULL, then the current value is unchanged.

service

Specifies the database service that the Oracle Scheduler job class used by this agent will have affinity to. In a RAC environment, this means that the Messaging Gateway agent will run on only those database instances that are assigned to the service. If NULL, the job class used by this agent will be altered to belong to the default service which is mapped to every instance. If DBMS_MGWADM.NO_CHANGE, the current value is unchanged.

agent_name

Identifies the Messaging Gateway agent. DBMS_MGWADM.DEFAULT_AGENT specifies the default agent.

username

Specifies the username used for connections to the Oracle Database. NULL is not allowed. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged. If a username is specified then a password must also be specified.

password

Specifies the password used for connections to the Oracle Database. NULL is not allowed. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged. A password must be specified if a username is specified.

database

Specifies the database connect string used for connections to the Oracle Database. NULL indicates that a local connection should be used. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged.Oracle strongly recommends that a connect string, rather than NULL, be specified. Usually it will be a net service name from tnsnames.ora.

conntype

Specifies the type of connection to the Oracle Database, DBMS_MGWADM.JDBC_OCI or DBMS_MGWADM.JDBC_THIN. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged

initfile

Specifies a Messaging Gateway initialization file used by this agent. NULL indicates that the default initialization file is used. If a value is specified, it should be the full pathname of the file. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged.

comment

Optional comments for this agent. NULL if a comment is not desired. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged.


Note:

The max_connections parameter included in previous versions of this subprogram has been deprecated and is non-operational

Usage Notes


ALTER_JOB Procedure

This procedure alters the properties of a propagation job.

Syntax

DBMS_MGWADM.ALTER_JOB (
   job_name          IN   VARCHAR2,
   rule              IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   transformation    IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   exception_queue   IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   poll_interval     IN   PLS_INTEGER DEFAULT 0,
   options           IN   SYS.MGW_PROPERTIES DEFAULT NULL,
   comments          IN   VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE );

Parameters

Table 76-22 ALTER_JOB Procedure Parameters

Parameter Description

job_name

Identifies the propagation job

rule

Specifies an optional subscription rule used to dequeue messages from the propagation source. The syntax and interpretation of this parameter depend on the propagation type. A NULL value indicates that no subscription rule is needed. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged.

transformation

Specifies the transformation needed to convert between the Oracle Streams AQ payload and an ADT defined by Messaging Gateway. The type of transformation needed depends on the value specified for propagation_type.

A NULL value indicates that no transformation is needed. If DBMS_MGWADM.NO_CHANGE, the current value is unchanged.

exception_queue

Specifies a queue used for exception message logging purposes. This queue must be on the same messaging system as the propagation source. In cases in which no exception queue is associated with the job, propagation stops if a problem occurs. The syntax and interpretation of this parameter depend on the propagation type.

A NULL value indicates that no exception queue is used. If DBMS_MGWADM.NO_CHANGE, the current value is unchanged.

poll_interval

Specifies the polling interval, in seconds, used by the Messaging Gateway agent when checking for messages in the source queue. If no messages are available the agent will not poll again until the polling interval has passed. Once the agent detects a message it will continue propagating messages as long as any are available.

Values: NULL, 0, or value > 0:

  • If zero (default), the current value will not be changed.

  • If NULL, the current value will be reset and the Messaging Gateway default polling interval will be used. The default polling interval is 5 seconds and can be overridden by the Messaging Gateway initialization file.

options

Optional job properties. If NULL, no options will be changed. If not NULL, then the properties specified in this list are combined with the current optional properties to form a new set of job options.

comments

An optional comment for this agent, or NULL if one is not desired. If DBMS_MGWADM.NO_CHANGE, the current value will not be changed.


Usage Notes

See Also:


ALTER_MSGSYSTEM_LINK Procedure for TIB/Rendezvous

Alters the properties of a TIB/Rendezvous messaging system link.

Syntax

DBMS_MGWADM.ALTER_MSGSYSTEM_LINK ( 
   linkname      IN  VARCHAR2,
   properties    IN  SYS.MGW_TIBRV_PROPERTIES,
   options       IN  SYS.MGW_PROPERTIES DEFAULT NULL,
   comment       IN  VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE );

Parameters

Table 76-23 ALTER_MSGSYSTEM_LINK Procedure Parameters for TIB/Rendezvous

Parameters Description

linkname

The messaging system link name

properties

Basic properties for a TIB/Rendezvous messaging system link. If NULL, then no link properties will be changed.

options

Optional link properties. If NULL, then no options will be changed. If not NULL, then the properties specified in this list are combined with the current options properties to form a new set of link options.

comment

A user-specified description, or NULL if one is not desired. If DBMS_MGWADM.NO_CHANGE, then the current value will not be changed.


Usage Notes

To retain an existing value for a messaging link property with a VARCHAR2 data type, specify DBMS_MGWADM.NO_CHANGE for that particular property. To preserve an existing value for a property of another data type, specify NULL for that property.

The options parameter specifies a set of properties used to alter the current optional properties. Each property affects the current property list in a particular manner: add a new property, replace an existing property, remove an existing property, or remove all properties.

Some properties cannot be modified, and this procedure will fail if an attempt is made to alter such a property. For properties and options that can be changed, a few are dynamic, and Messaging Gateway uses the new values immediately. Others require the Messaging Gateway agent to be shut down and restarted before they take effect.

See Also:

"TIB/Rendezvous System Properties" in Oracle Streams Advanced Queuing User's Guide for more information about the messaging system properties and options

ALTER_MSGSYSTEM_LINK Procedure for WebSphere MQ

This procedure alters the properties of a WebSphere MQ messaging system link.

Syntax

DBMS_MGWADM.ALTER_MSGSYSTEM_LINK (
   linkname   IN  VARCHAR2,
   properties IN  SYS.MGW_MQSERIES_PROPERTIES,
   options    IN  SYS.MGW_PROPERTIES DEFAULT NULL,
   comment    IN  VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE);

Parameters

Table 76-24 ALTER_MSGSYSTEM_LINK Procedure Parameters for WebSphere MQ

Parameters Description

linkname

The messaging system link name

properties

Basic properties for a WebSphere MQ messaging system link. If it is NULL, then no link properties are changed.

options

Optional link properties. NULL if no options are changed. If not NULL, then the properties specified in this list are combined with the current options properties to form a new set of link options.

comment

An optional description or NULL if not desired. If DBMS_MGWADM.NO_CHANGE is specified, then the current value is not changed.


Usage Notes

To retain an existing value for a messaging link property with a VARCHAR2 data type, specify DBMS_MGWADM.NO_CHANGE for that particular property. To preserve an existing value for a property of another data type, specify NULL for that property.

The options parameter specifies a set of properties used to alter the current optional properties. Each property affects the current property list in a particular manner: add a new property, replace an existing property, remove an existing property, or remove all properties.

Some properties cannot be modified, and this procedure will fail if an attempt is made to alter such a property. For properties and options that can be changed, a few are dynamic, and Messaging Gateway uses the new values immediately. Others require the Messaging Gateway agent to be shut down and restarted before they take effect.

See Also:

"WebSphere MQ System Properties" in Oracle Streams Advanced Queuing User's Guide for more information about the messaging system properties and options

ALTER_PROPAGATION_SCHEDULE Procedure

This procedure alters a propagation schedule.

Note:

This subprogram has been deprecated as a result of improved technology (see ALTER_JOB Procedure), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.ALTER_PROPAGATION_SCHEDULE (
   schedule_id  IN VARCHAR2,
   duration     IN NUMBER DEFAULT NULL,
   next_time    IN VARCHAR2 DEFAULT NULL,
   latency      IN NUMBER DEFAULT NULL);

Parameters

Table 76-25 ALTER_PROPAGATION_SCHEDULE Procedure Parameters

Parameter Description

schedule_id

Identifies the propagation schedule to be altered

duration

Reserved for future use

next_time

Reserved for future use

latency

Specifies the polling interval, in seconds, used by the Messaging Gateway agent when checking for messages in the source queue. If no messages are available in the source queue, then the agent will not poll again until the polling interval has passed. Once the agent detects a message it will continue propagating messages as long as any are available.

Values: NULL or value > 0. If latency is NULL, then the Messaging Gateway agent default polling interval will be used. The default polling interval is 5 seconds, but it can be overridden by the Messaging Gateway initialization file.


Usage Notes

This procedure always overwrites the existing value for each parameter. If a given parameter is not specified, then the existing values are overwritten with the default value.


ALTER_SUBSCRIBER Procedure

This procedure alters the parameters of a subscriber used to consume messages from a source queue for propagation to a destination.

Note:

This subprogram has been deprecated as a result of improved technology (see ALTER_JOB Procedure ), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.ALTER_SUBSCRIBER (
   subscriber_id    IN VARCHAR2,
   rule             IN VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   transformation   IN VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   exception_queue  IN VARCHAR2 DEFAULT DBMS_MGWADM.NO_CHANGE,
   options          IN SYS.MGW_PROPERTIES DEFAULT NULL );

Parameters

Table 76-26 ALTER_SUBSCRIBER Procedure Parameters

Parameter Description

subscriber_id

Identifies the subscriber to be altered

rule

Specifies an optional subscription rule used by the subscriber to dequeue messages from the source queue. The syntax and interpretation of this parameter depend on the subscriber propagation type.

A NULL value indicates that no subscription rule is needed. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged.

transformation

Specifies the transformation needed to convert between the Oracle Streams AQ payload and an ADT defined by Messaging Gateway. The type of transformation needed depends on the subscriber propagation type.

A NULL value indicates that no transformation is needed. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged.

exception_queue

Specifies a queue used for exception message logging. This queue must be on the same messaging system as the propagation source. If no exception queue is associated with the subscriber, then propagation stops if a problem occurs. The syntax and interpretation of this parameter depend on the subscriber propagation type.

A NULL value indicates that no exception queue is used. If DBMS_MGWADM.NO_CHANGE, then the current value is unchanged.

The source queue and exception queue cannot be the same queue.

options

Optional subscriber properties. If NULL, then no options will be changed. If not NULL, then the properties specified in this list are combined with the current optional properties to form a new set of subscriber options.


Usage Notes

If the non-Oracle messaging link being accessed for the subscriber uses a JMS interface, then the Messaging Gateway agent will use the Oracle JMS interface to access the Oracle Streams AQ queues. Otherwise the native Oracle Streams AQ interface will be used. Parameters are interpreted differently when the Messaging Gateway agent uses Oracle JMS for JMS connections.

When propagating from a JMS source, the subscriber rule cannot be altered. Instead, the subscriber must be removed and added with the new rule. For JMS, changing the message selector on a durable subscription is equivalent to deleting and re-creating the subscription.

Transformations are not currently supported if the Oracle JMS interface is used for propagation. The transformation parameter must be DBMS_MGWADM.NO_CHANGE (the default value).

The options parameter specifies a set of properties used to alter the current optional properties. Each property affects the current property list in a particular manner: add a new property, replace an existing property, remove an existing property, or remove all properties.

See Also:


CLEANUP_GATEWAY Procedures

This procedure cleans up Messaging Gateway. The procedure performs cleanup or recovery actions that may be needed when Messaging Gateway is left in some abnormal or unexpected condition. The MGW_GATEWAY view lists Messaging Gateway status and configuration information that pertains to the cleanup actions.

Syntax

DBMS_MGWADM.CLEANUP_GATEWAY(
   action       IN   BINARY_INTEGER,
   sarg         IN   VARCHAR2 DEFAULT NULL);
DBMS_MGWADM.CLEANUP_GATEWAY(
   agent_name   IN   VARCHAR2,   action       IN   BINARY_INTEGER,   sarg         IN   VARCHAR2 DEFAULT NULL );

Parameters

Table 76-27 CLEANUP_GATEWAY Procedure Parameters

Parameter Description

action

The cleanup action to be performed. Values:

  • DBMS_MGWADM.CLEAN_STARTUP_STATE for Messaging Gateway start up state recovery

  • DBMS_MGWADM.CLEAN_LOG_QUEUES for log queue cleanup

  • DBMS_MGWADM.RESET_SUB_MISSING_LOG_REC for propagation job recovery due to missing log record

  • DBMS_MGWADM.RESET_SUB_MISSING_MESSAGE for propagation job recovery due to missing message

sarg

Optional argument whose meaning depends on the value specified for action. This should be NULL if it is not used for the specified action.

agent_name

Identifies the Messaging Gateway agent. DBMS_MGWADM.DEFAULT_AGENT specifies the default agent.


Usage Notes

CLEAN_STARTUP_STATE

sarg is not used and must be NULL.

The CLEAN_STARTUP_STATE action recovers Messaging Gateway to a known state when the Messaging Gateway agent has crashed or some other abnormal event occurs, and Messaging Gateway cannot be restarted. This should be done only when the Messaging Gateway agent has been started but appears to have crashed or has been nonresponsive for an extended period of time.

The CLEAN_STARTUP_STATE action may be needed when the MGW_GATEWAY view shows that the AGENT_STATUS value is something other than NOT_STARTED or START_SCHEDULED, and the AGENT_PING value is UNREACHABLE for an extended period of time.

If the AGENT_STATUS value is BROKEN, then the Messaging Gateway agent cannot be started until the problem has been resolved and the CLEAN_STARTUP_STATE action used to reset the agent status. A BROKEN status can indicate that the Messaging Gateway start job detected a Messaging Gateway agent already running. This condition that should never occur under normal use.

Cleanup tasks include:

Execution of this command fails if:

Note:

Terminate any Messaging Gateway agent process that may still be running after a CLEAN_STARTUP_STATE action has been successfully performed. This should be done before calling DBMS_MGWADM.STARTUP to start Messaging Gateway. The process is usually named extprocmgwextproc.

CLEAN_LOG_QUEUES

sarg is not used and must be NULL.

The Messaging Gateway agent will clean log queues for all configured messaging system links. The agent will temporarily stop all propagation activity and then remove all obsolete and bad log records from the log queues for all links. The procedure will fail if the Messaging Gateway agent is not running.

This cleanup action is automatically performed each time the Messaging Gateway agent is started.

Note:

The CLEAN_LOG_QUEUES action is performed only on agent startup. If this procedure is called when the agent is running, then the Messaging Gateway agent ignores it.

RESET_SUB_MISSING_LOG_REC

sarg specifies a Messaging Gateway job name (or subscriber ID) to be reset. It must not be NULL.

The Messaging Gateway agent recovers a Messaging Gateway propagation job that has failed due to a missing log record. The agent will reset the source and destination log records. The procedure will fail if the Messaging Gateway agent is not running.

Caution:

If the messages in the source queue had already been propagated to the destination queue, then this action may result in duplicate messages.

RESET_SUB_MISSING_MESSAGE

sarg specifies a Messaging Gateway job name (or subscriber ID) to be reset. It must not be NULL.

The Messaging Gateway agent recovers a Messaging Gateway propagation job that has failed due to a missing persistent source message. The agent will treat the message as a non-persistent message and continue processing that propagation job. The procedure will fail if the Messaging Gateway agent is not running.


CREATE_AGENT Procedure

This procedure creates a Messaging Gateway agent that will be used to process propagation jobs.

Syntax

DBMS_MGWADM.CREATE_AGENT (
   agent_name     IN   VARCHAR2,
   username       IN   VARCHAR2 DEFAULT NULL,
   password       IN   VARCHAR2 DEFAULT NULL,
   database       IN   VARCHAR2 DEFAULT NULL,
   conntype       IN   VARCHAR2 DEFAULT DBMS_MGWADM.JDBC_OCI,
   max_memory     IN   PLS_INTEGER DEFAULT 64,
   max_threads    IN   PLS_INTEGER DEFAULT 1,
   service        IN   VARCHAR2 DEFAULT NULL,
   initfile       IN   VARCHAR2 DEFAULT NULL,
   comment        IN   VARCHAR2  DEFAULT NULL );

Parameters

Table 76-28 CREATE_AGENT Procedure Parameters

Parameter Description

agent_name

A name used to identify the agent

username

Specifies the username used for connections to the Oracle Database

password

Specifies the password used for connections to the Oracle Database. A password must be specified if a username is specified.

database

Specifies the database connect string used for connections to the Oracle Database. NULL indicates that a local connection should be used. A value can be specified only if username is specified. Oracle strong recommends that a connect string, rather than NULL be specified. Usually it will be a net service name from tnsnames.ora.

conntype

Specifies the type of connection to the Oracle Database.Values: DBMS_MGWADM.JDBC_OCI, DBMS_MGWADM.JDBC_THIN

max_memory

Specifies the maximum heap size, in MB, used by the Messaging Gateway agent

max_threads

Specifies the number of messaging threads that the Messaging Gateway agent creates. This determines the number of propagation jobs that the agent can concurrently process.

service

Specifies the database service that the Oracle Scheduler job class used by this agent will have affinity to. In a RAC environment, this means that the Messaging Gateway agent will only run on those database instances that are assigned to the service. If NULL, then the job class will belong to the default service which is mapped to every instance.

initfile

Specifies a Messaging Gateway initialization file used by this agent. NULL indicates that the default initialization file is used. If a value is specified, it should be the full pathname of the file.

comment

An optional comment for this agent. NULL if one is not desired.


Usage Notes


CREATE_JOB Procedure

This procedure creates a job used to propagate message from a source to a destination.

Syntax

DBMS_MGWADM.CREATE_JOB (
   job_name           IN   VARCHAR2,
   propagation_type   IN   PLS_INTEGER,
   source             IN   VARCHAR2,
   destination        IN   VARCHAR2,
   rule               IN   VARCHAR2 DEFAULT NULL,
   transformation     IN   VARCHAR2 DEFAULT NULL,
   exception_queue    IN   VARCHAR2 DEFAULT NULL,
   poll_interval      IN   PLS_INTEGER DEFAULT NULL,
   options            IN   SYS.MGW_PROPERTIES DEFAULT NULL,
   enabled            IN   BOOLEAN DEFAULT TRUE,
   comments           IN   VARCHAR2 DEFAULT NULL);

Parameters

Table 76-29 CREATE_JOB Procedure Parameters

Parameter Description

job_name

A user defined name to identify the propagation job

propagation_type

Specifies the type of message propagation.

  • DBMS_MGWADM.OUTBOUND_PROPAGATION for Oracle Streams AQ to non-Oracle propagation.

  • DBMS_MGWADM.INBOUND_PROPAGATION for non-Oracle to Oracle Streams AQ propagation.

source

Specifies the source queue whose messages are to be propagated. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

destination

Specifies the destination queue to which messages are propagated. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

rule

Specifies an optional subscription rule used to dequeue messages from the source queue. This should be NULL if no rule is needed. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

transformation

Specifies the transformation needed to convert between the Oracle Streams AQ payload and an ADT defined by Messaging Gateway. The type of transformation needed depends on the value specified for propagation_type.

If no transformation is specified the Oracle Streams AQ payload type must be supported by Messaging Gateway.

exception_queue

Specifies a queue used for exception message logging purposes. This queue must be on the same messaging system as the propagation source. If NULL, an exception queue will not be used and propagation will stop if a problem occurs. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

The source queue and exception queue cannot be the same queue.

poll_interval

Specifies the polling interval, in seconds, used by the Messaging Gateway agent when checking for messages in the source queue. If no messages are available the agent will not poll again until the polling interval has passed. Once the agent detects a message it will continue propagating messages as long as any are available.

Values: NULL or value > 0. If NULL, then the Messaging Gateway default polling interval will be used. The default polling interval is 5 seconds and can be overridden by the Messaging Gateway initialization file.

options

Optional job properties, NULL if there are none. Typically these are lesser used configuration properties supported by the messaging system.

enabled

Specifies whether this propagation job is enabled after creation. Values: TRUE, FALSE.

  • If TRUE (default), the job will be enabled after it is created.

  • If FALSE, the job will be disabled after it is created. A propagation job must be enabled and the Messaging Gateway agent running before messages can be propagated.

comments

An optional comment for this job. NULL if one is not desired.


Usage Notes

OUTBOUND_PROPAGATION Jobs

The parameters for an outbound propagation job are interpreted as follows:

INBOUND_PROPAGATION Jobs

The parameters for an inbound propagation job are interpreted as follows:


CREATE_MSGSYSTEM_LINK Procedures for TIB/Rendezvous

Creates a link to a TIB/Rendezvous messaging system.

Syntax

DBMS_MGWADM.CREATE_MSGSYSTEM_LINK ( 
   linkname     IN  VARCHAR2,
   properties   IN  SYS.MGW_TIBRV_PROPERTIES,
   options      IN  SYS.MGW_PROPERTIES DEFAULT NULL,
   comment      IN  VARCHAR2 DEFAULT NULL );
DBMS_MGWADM.CREATE_MSGSYSTEM_LINK ( 
   linkname     IN  VARCHAR2,
   agent_name   IN  VARCHAR2,
   properties   IN  SYS.MGW_TIBRV_PROPERTIES,
   options      IN  SYS.MGW_PROPERTIES DEFAULT NULL,
   comment      IN  VARCHAR2 DEFAULT NULL );

Parameters

Table 76-30 CREATE_MSGSYSTEM_LINK Procedure Parameters for TIB/Rendezvous

Parameter Description

linkname

A user-defined name to identify this messaging system link

properties

Basic properties of a TIB/Rendezvous messaging system link.

options

Optional link properties. NULL if there are none. These are less frequently used configuration properties supported by the messaging system

comment

A user-specified description. NULL if one is not desired.

agent_name

Specifies the Messaging Gateway agent that will be used to process all propagation jobs associated with this link. DBMS_MGWADM.DEFAULT_AGENT specifies the default agent.


Usage Notes

The Messaging Gateway default agent will process the propagation jobs associated with this link if an agent name is not specified.

See Also:

"TIB/Rendezvous System Properties" in Oracle Streams Advanced Queuing User's Guide for more information about the messaging system properties and options

CREATE_MSGSYSTEM_LINK Procedures for WebSphere MQ

This procedure creates a messaging system link to a WebSphere MQ messaging system.

Syntax

DBMS_MGWADM.CREATE_MSGSYSTEM_LINK(
   linkname    IN VARCHAR2,
   properties  IN SYS.MGW_MQSERIES_PROPERTIES,
   options     IN SYS.MGW_PROPERTIES DEFAULT NULL,
   comment     IN VARCHAR2 DEFAULT NULL);
DBMS_MGWADM.CREATE_MSGSYSTEM_LINK(
   linkname    IN VARCHAR2,
   agent_name  IN  VARCHAR2,
   properties  IN SYS.MGW_MQSERIES_PROPERTIES,
   options     IN SYS.MGW_PROPERTIES DEFAULT NULL,
   comment     IN VARCHAR2 DEFAULT NULL);

Parameters

Table 76-31 CREATE_MSGSYSTEM_LINK Procedure Parameters for WebSphere MQ

Parameter Description

linkname

A user-defined name to identify the messaging system link

properties

Basic properties of a WebSphere MQ messaging system link

options

Optional link properties. NULL if there are none. These are less frequently used configuration properties supported by the messaging system.

comment

A user-specified description. NULL if one is not desired

agent_name

Specifies the Messaging Gateway agent that will be used to process all propagation jobs associated with this link. DBMS_MGWADM.DEFAULT_AGENT specifies the default agent.


Usage Notes

The Messaging Gateway default agent will process the propagation jobs associated with this link if an agent name is not specified.

See Also:

"WebSphere MQ System Properties" in Oracle Streams Advanced Queuing User's Guide for more information about the messaging system properties and options

DB_CONNECT_INFO Procedure

This procedure configures connection information used by the Messaging Gateway default agent for connections to Oracle Database.

Note:

This subprogram has been deprecated as a result of improved technology (see ALTER_AGENT Procedures), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.DB_CONNECT_INFO (
   username      IN VARCHAR2,
   password      IN VARCHAR2,
   database      IN VARCHAR2 DEFAULT NULL);

Parameters

Table 76-32 DB_CONNECT_INFO Procedure Parameters

Parameter Description

username

The username used for connections to Oracle Database. NULL is not allowed

password

The password used for connections to Oracle Database. NULL is not allowed

database

The database connect string used by the Messaging Gateway agent. NULL indicates that a local connection should be used.

Oracle strongly recommends that a not NULL value be specified. Usually it will be a net service name from tnsnames.ora.


Usage Notes

The Messaging Gateway agent connects to Oracle Database as the user configured by this procedure. An Oracle administrator should create the user, grant it the role MGW_AGENT_ROLE, and then call this procedure to configure Messaging Gateway. Role MGW_AGENT_ROLE is used to grant this user special privileges needed to access Messaging Gateway configuration information stored in the database, enqueue or dequeue messages to and from Oracle Streams AQ queues, and perform certain Oracle Streams AQ administration tasks.


DISABLE_JOB Procedure

This procedure disables a propagation job.

Syntax

DBMS_MGWADM.DISABLE_JOB (
   job_name  IN VARCHAR2);

Parameters

Table 76-33 DISABLE_JOB Procedure Parameters

Parameter Description

job_name

Identifies the propagation job



DISABLE_PROPAGATION_SCHEDULE Procedure

This procedure disables a propagation schedule.

Note:

This subprogram has been deprecated as a result of improved technology (see DISABLE_JOB Procedure), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.DISABLE_PROPAGATION_SCHEDULE (
   schedule_id  IN VARCHAR2);

Parameters

Table 76-34 DISABLE_PROPAGATION_SCHEDULE Procedure Parameters

Parameter Description

schedule_id

Identifies the propagation schedule to be disabled



ENABLE_JOB Procedure

This procedure enables a propagation job.

Syntax

DBMS_MGWADM.ENABLE_JOB (
   job_name  IN VARCHAR2 );

Parameters

Table 76-35 ENABLE_JOB Procedure Parameters

Parameter Description

job_name

Identifies the propagation job



ENABLE_PROPAGATION_SCHEDULE Procedure

This procedure enables a propagation schedule.

Note:

This subprogram has been deprecated as a result of improved technology (see ENABLE_JOB Procedure), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.ENABLE_PROPAGATION_SCHEDULE (
   schedule_id  IN VARCHAR2 );

Parameters

Table 76-36 ENABLE_PROPAGATION_SCHEDULE Procedure Parameters

Parameter Description

schedule_id

Identifies the propagation schedule to be enabled



REGISTER_FOREIGN_QUEUE Procedure

This procedure registers a non-Oracle queue entity in Messaging Gateway.

Syntax

DBMS_MGWADM.REGISTER_FOREIGN_QUEUE(
   name            IN VARCHAR2,
   linkname        IN VARCHAR2,
   provider_queue  IN VARCHAR2 DEFAULT NULL,
   domain          IN INTEGER DEFAULT NULL,
   options         IN SYS.MGW_PROPERTIES DEFAULT NULL,
   comment         IN VARCHAR2 DEFAULT NULL);

Parameters

Table 76-37 REGISTER_FOREIGN_QUEUE Procedure Parameters

Parameters Description

name

The registered queue name. This name identifies the foreign queue within Messaging Gateway and need not match the name of the queue in the foreign messaging system.

linkname

The link name for the messaging system on which this queue exists

provider_queue

The message provider (native) queue name. If NULL, then the value provided for the name parameter is used as the provider queue name.

domain

The domain type of the queue. NULL means the domain type is automatically determined based on the messaging system of the queue. DBMS_MGWADM.DOMAIN_QUEUE is for a queue (point-to-point model). DBMS_MGWADM.DOMAIN_TOPIC is for a topic (publish-subscribe model).

options

Optional queue properties

comment

A user-specified description. Can be NULL.


Usage Notes

This procedure does not create the physical queue in the non-Oracle messaging system. The non-Oracle queue must be created using the administration tools for that messaging system.

See Also:

For more information when registering queues for the WebSphere MQ messaging system or the TIB/Rendezvous messaging system, specifically "Optional Foreign Queue Configuration Properties" in Oracle Streams Advanced Queuing User's Guide.

REMOVE_AGENT Procedure

This procedure removes a Messaging Gateway agent.

Syntax

DBMS_MGWADM.REMOVE_AGENT(
   agent_name   IN   VARCHAR2 );

Parameters

Table 76-38 REMOVE_AGENT Procedure Parameters

Parameters Description

agent_name

Identifies the Messaging Gateway agent


Usage Notes

All messaging system links associated with this Messaging Gateway agent must be removed and the agent must be stopped before it can be removed. The Messaging Gateway default agent cannot be removed.


REMOVE_JOB Procedure

This procedure removes a propagation job.

Syntax

DBMS_MGWADM.REMOVE_JOB(
   job_name   IN   VARCHAR2,   force      IN   PLS_INTEGER DEFAULT DBMS_MGWADM.NO_FORCE);

Parameters

Table 76-39 REMOVE_JOB Procedure Parameters

Parameters Description

job_name

Identifies the propagation job

force

Specifies whether the procedure should succeed even if Messaging Gateway is not able to perform all cleanup actions pertaining to this propagation job.

Values: DBMS_MGWADM.NO_FORCE, DBMS_MGWADM.FORCE

  • NO_FORCE (default) means the job is not removed if Messaging Gateway is unable to clean up successfully

  • FORCE means the job is removed even though all cleanup actions may not be done


Usage Notes


REMOVE_MSGSYSTEM_LINK Procedure

This procedure removes a messaging system link for a non-Oracle messaging system.

Syntax

DBMS_MGWADM.REMOVE_MSGSYSTEM_LINK(
   linkname  IN VARCHAR2);

Parameters

Table 76-40 REMOVE_MSGSYSTEM_LINK Procedure Parameters

Parameters Description

linkname

The messaging system link name


Usage Notes

All registered queues associated with this link must be removed before the messaging system link can be removed. This procedure fails if there is a registered foreign (non-Oracle) queue that references this link.


REMOVE_OPTION Procedure

This procedure removes a Messaging Gateway configuration option. It can be used to remove an agent option, a messaging link option, or a propagation job option.

Syntax

DBMS_MGWADM.REMOVE_OPTION (
   target_type   IN   PLS_INTEGER,
   target_name   IN   VARCHAR2,
   option_name   IN   VARCHAR2);

Parameters

Table 76-41 REMOVE_OPTION Procedure Parameters

Parameter Description

target_type

Specifies the target type of the Messaging Gateway entity:

  • DBMS_MGWADM.AGENT_JAVA_PROP to remove a Java System property for a Messaging Gateway agent

  • DBMS_MGWADM.MSGLINK_OPTION to remove a messaging link option

  • DBMS_MGWADM.JOB_OPTION to remove a propagation job option

target_name

Name or identifier of the target. The value for this parameter depends on the value specified for target_type parameter. This must not be NULL.

option_name

Option name. This must not be NULL.


Usage Notes

DBMS_MGWADM.AGENT_JAVA_PROP Target

The procedure removes an agent option used to set a Java System property when the Messaging Gateway agent is started. The agent must be restarted for the change to take effect.

The parameters are interpreted as follows:

DBMS_MGWADM.MSGLINK_OPTION Target

The procedure removes a single option for a Messaging Gateway messaging system link. This is equivalent to calling DBMS_MGWADM.ALTER_MSGSYSTEM_LINK and using the options parameter to remove an option.

The parameters are interpreted as follows:

DBMS_MGWADM.JOB_OPTION Target

The procedure removes a single option for a Messaging Gateway propagation job. This is equivalent to calling DBMS_MGWADM.ALTER_JOB and using the options parameter to remove an option.

The parameters are interpreted as follows:


REMOVE_SUBSCRIBER Procedure

This procedure removes a subscriber used to consume messages from a source queue for propagation to a destination.

Note:

This subprogram has been deprecated as a result of improved technology (see REMOVE_JOB Procedure), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.REMOVE_SUBSCRIBER (
   subscriber_id  IN VARCHAR2,
   force          IN BINARY_INTEGER DEFAULT DBMS_MGWADM.NO_FORCE );

Parameters

Table 76-42 REMOVE_SUBSCRIBER Procedure Parameters

Parameter Description

subscriber_id

Identifies the subscriber to be removed

force

Specifies whether this procedure should succeed even if Messaging Gateway is not able to perform all cleanup actions pertaining to this subscriber.

Values: DBMS_MGWADM.NO_FORCE, DBMS_MGWADM.FORCE

  • NO_FORCE means the subscriber is not removed if Messaging Gateway is unable to clean up successfully (default)

  • FORCE means the subscriber is removed even though all cleanup actions may not be done


Usage Notes


RESET_JOB Procedure

This procedure resets the propagation error state for a propagation job.

Syntax

DBMS_MGWADM.RESET_JOB (
   job_name   IN   VARCHAR2);

Parameters

Table 76-43 RESET_JOB Procedure Parameters

Parameter Description

job_name

Identifies the propagation job


Usage Notes

This procedure can be used to reset a propagation job that has been set to a failed state and propagation activities have been stopped. The administrator should correct the problem and then call this procedure to allow the agent to retry the propagation job. The STATUS field of the MGW_JOBS view indicates the job status.


RESET_SUBSCRIBER Procedure

This procedure resets the propagation error state for a subscriber.

Note:

This subprogram has been deprecated as a result of improved technology (see RESET_JOB Procedure), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.RESET_SUBSCRIBER (
   subscriber_id  IN VARCHAR2 );

Parameters

Table 76-44 RESET_SUBSCRIBER Procedure Parameters

Parameter Description

subscriber_id

Identifies the subscriber



SCHEDULE_PROPAGATION Procedure

This procedure schedules message propagation from a source to a destination. The schedule must be enabled and Messaging Gateway started in order for messages to be propagated.

Note:

This subprogram has been deprecated as a result of improved technology (see CREATE_JOB Procedure), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.SCHEDULE_PROPAGATION (
   schedule_id       IN VARCHAR2,
   propagation_type  IN BINARY_INTEGER,
   source            IN VARCHAR2,
   destination       IN VARCHAR2,
   start_time        IN DATE DEFAULT SYSDATE,
   duration          IN NUMBER DEFAULT NULL,
   next_time         IN VARCHAR2 DEFAULT NULL,
   latency           IN NUMBER DEFAULT NULL);

Parameters

Table 76-45 SCHEDULE_PROPAGATION Procedure Parameters

Parameter Description

schedule_id

Specifies a user-defined name that identifies the schedule

propagation_type

Specifies the type of message propagation. DBMS_MGWADM.OUTBOUND_PROPAGATION is for Oracle Streams AQ to non-Oracle propagation. DBMS_MGWADM.INBOUND_PROPAGATION is for non-Oracle to Oracle Streams AQ propagation.

source

Specifies the source queue whose messages are to be propagated. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

destination

Specifies the destination queue to which messages are propagated. The syntax and interpretation of this parameter depend on the value specified for propagation_type.

start_time

Reserved for future use

duration

Reserved for future use

next_time

Reserved for future use

latency

Specifies the polling interval, in seconds, used by the Messaging Gateway agent when checking for messages in the source queue. If no messages are available in the source queue, then the agent will not poll again until the polling interval has passed. Once the agent detects a message it will continue propagating messages as long as any are available.

Values: NULL or value > 0. If latency is NULL, then the Messaging Gateway agent default polling interval will be used. The default polling interval is 5 seconds but it can be overridden by the Messaging Gateway initialization file.


Usage Notes

For outbound propagation, parameters are interpreted as follows:

For inbound propagation, parameters are interpreted as follows:

The schedule is set to an enabled state when it is created.


SET_LOG_LEVEL Procedures

This procedure dynamically alters the Messaging Gateway agent logging level. The Messaging Gateway agent must be running.

Syntax

DBMS_MGWADM.SET_LOG_LEVEL (
   log_level    IN   BINARY_INTEGER);
DBMS_MGWADM.SET_LOG_LEVEL (
   agent_name   IN   VARCHAR2,
   log_level    IN   BINARY_INTEGER);

Parameters

Table 76-46 SET_LOG_LEVEL Procedure Parameters

Parameter Description

log_level

Level at which the Messaging Gateway agent logs information. DBMS_MGWADM.BASIC_LOGGING generates the least information while DBMS_MGWADM.TRACE_DEBUG_LOGGING generates the most information.

agent_name

Identifies the Messaging Gateway agent. DBMS_MGWADM.DEFAULT_AGENT specifies the default agent.


See Also:

Table 76-3, "DBMS_MGWADM Constants—Logging Levels" for details on the log_level parameter

SET_OPTION Procedure

This procedure sets a Messaging Gateway configuration option. It can be used to set an agent option, a messaging link option, or a propagation job option.

Syntax

DBMS_MGWADM.SET_OPTION (
   target_type   IN   PLS_INTEGER,
   target_name   IN   VARCHAR2,
   option_name   IN   VARCHAR2,
   option_value  IN   VARCHAR2,
   encrypted     IN   BOOLEAN DEFAULT FALSE );

Parameters

Table 76-47 SET_OPTION Procedure Parameters

Parameter Description

target_type

Specifies the target type of the Messaging Gateway entity:

  • DBMS_MGWADM.AGENT_JAVA_PROP to set a Java System property for a Messaging Gateway agent

  • DBMS_MGWADM.MSGLINK_OPTION to set a messaging link option

  • DBMS_MGWADM.JOB_OPTION to set a propagation job option

target_name

Name or identifier of the target. The value for this parameter depends on the value specified for target_type parameter. This must not be NULL.

option_name

Option name. This must not be NULL.

option_value

Option value

encrypted

Indicates whether the value should be stored as encrypted:

  • TRUE if the value should be stored in an encrypted form

  • FALSE if the value should be stored in a cleartext form


Usage Notes

DBMS_MGWADM.AGENT_JAVA_PROP Target

The procedure will store an agent option used to set a Java System property when the Messaging Gateway agent is started. The agent must be restarted for the change to take effect.

The parameters are interpreted as follows:

DBMS_MGWADM.MSGLINK_OPTION Target

The procedure will set or alter a single option for a Messaging Gateway messaging system link. This is equivalent to calling DBMS_MGWADM.ALTER_MSGSYSTEM_LINK and using the options parameter to set an option.

The parameters are interpreted as follows:

DBMS_MGWADM.JOB_OPTION Target

The procedure will set or alter a single option for a Messaging Gateway propagation job. This is equivalent to calling DBMS_MGWADM.ALTER_JOB and using the options parameter to set an option.

The parameters are interpreted as follows:


SHUTDOWN Procedures

This procedure shuts down the Messaging Gateway agent. No propagation activity occurs until Messaging Gateway is restarted.

Syntax

DBMS_MGWADM.SHUTDOWN (
   sdmode      IN BINARY_INTEGER DEFAULT DBMS_MGWADM.SHUTDOWN_NORMAL);
DBMS_MGWADM.SHUTDOWN (
   agent_name  IN VARCHAR2);

Parameters

Table 76-48 SHUTDOWN Procedure Parameters

Parameter Description

sdmode

The shutdown mode. The only value currently supported is DBMS_MGWADM.SHUTDOWN_NORMAL for normal shutdown. The Messaging Gateway agent may attempt to complete any propagation work currently in progress.

agent_name

Identifies the Messaging Gateway agent. DBMS_MGWADM.DEFAULT_AGENT specifies the default agent.


Usage Notes

The Messaging Gateway default agent is shut down if no agent name is specified.


STARTUP Procedures

This procedure starts the Messaging Gateway agent. It must be called before any propagation activity can take place.

Syntax

DBMS_MGWADM.STARTUP(
   instance       IN  BINARY_INTEGER DEFAULT 0,
   force          IN  BINARY_INTEGER DEFAULT DBMS_MGWADM.NO_FORCE);
DBMS_MGWADM.STARTUP(
   agent_name     IN  VARCHAR2);

Parameters

Table 76-49 STARTUP Procedure Parameters

Parameter Description

instance

Specifies which instance can run the job queue job used to start the Messaging Gateway agent. If this is zero, then the job can be run by any instance.

Caution: This parameter has been deprecated.

force

If this is DBMS_MGWADM.FORCE, then any positive integer is acceptable as the job instance. If this is DBMS_MGWADM.NO_FORCE (the default), then the specified instance must be running; otherwise the routine raises an exception.

Caution: This parameter has been deprecated.

agent_name

Identifies the Messaging Gateway agent. DBMS_MGWADM.DEFAULT_AGENT specifies the default agent.


Usage Notes


UNREGISTER_FOREIGN_QUEUE Procedure

This procedure removes a non-Oracle queue entity in Messaging Gateway.

Syntax

DBMS_MGWADM.UNREGISTER_FOREIGN_QUEUE(
   name         IN VARCHAR2,
   linkname     IN VARCHAR2);

Parameters

Table 76-50 UNREGISTER_FOREIGN_QUEUE Procedure Parameters

Parameter Description

name

The queue name

linkname

The link name for the messaging system on which the queue exists


Usage Notes


UNSCHEDULE_PROPAGATION Procedure

This procedure removes a propagation schedule.

Note:

This subprogram has been deprecated as a result of improved technology (see REMOVE_JOB Procedure), and is retained only for reasons of backward compatibility.

Syntax

DBMS_MGWADM.UNSCHEDULE_PROPAGATION (
   schedule_id   IN VARCHAR2 );

Parameters

Table 76-51 UNSCHEDULE_PROPAGATION Procedure Parameters

Parameter Description

schedule_id

Identifies the propagation schedule to be removed