TUXEDO events are of two types: application events and system events. Application events are usually controlled or trapped by the application code. System events are generated by the TUXEDO run-time system when important changes in the TUXEDO system are detected. Application programs (clients or services) can subscribe to these system events.
The Event Broker MIB defines the characteristics of an event subscription. You can use the Event Broker MIB to obtain the characteristics of current event subscriptions, define new subscriptions, or invalidate subscriptions. To enable both system event and application event notification, you need to define the system event broker and the application event broker in the TUXEDO Core MIB.
Event subscriptions can be temporary or persistent. Persistent subscriptions survive across application activations and can be removed through the Event Broker MIB. The TUXEDO Event Broker MIB contains five groups of event subscriptions through which the Event Broker can be managed. The following table lists the event broker subscription groups.
Each object in these groups represents a single subscription request. Client Notifications ( Event subscriptions and the ability to change the TUXEDO MIB enables system administrators and application designers to write event-adaptive applications. When a failure is detected through a system event notification, a management framework program can perform the corrective measures. For example, a management framework task can be triggered to activate servers on a backup machine when it receives an event notification about a failure on a primary machine.
This represents a set of subscriptions registered with the Event Broker for client-based notification.
When an event is detected, it is compared to each
tuxEventClientTbl
group) indicate which events trigger an unsolicited message to a client. Service Notifications (tuxEventSvcTbl
group) indicate which events trigger a request to an application service. Application Queue Notifications (tuxEventQueTbl
group) indicate which events send a message to an application queue. System Command Notifications (tuxEventCmdTbl
group) indicate which events trigger an operating system command. Log File Notifications (tuxEventUlogTbl
group) indicate which events generate a record in the central event log (ulog). The Event Broker automatically removes temporary subscriptions when it detects that the corresponding target is no longer active.
tuxEventClientTbl
tuxEventClientTbl
instance. If the event name matches the value in the event expression and the optional filter rule is true, then the event buffer is sent to the specified client's unsolicited message handling routine. To create a new row in this table, it is necessary to issue a SET
request that at least specifies the values for tuxEventClientExpr
and tuxEventClientId
.
tuxEventClientIndx
Syntax
INTEGER
Access
read-only
Description
A running number as the unique identifier for a row in the table.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-only
Description
Event pattern expression. This expression, in
recomp
(3) format, controls which event names match this subscription.Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-only
Description
Event filter expression. This expression, if present, is evaluated with respect to the posted buffer's contents. It must evaluate to TRUE or this subscription is not matched. If the value of this is "-", it means that the filter expression is in binary format.
Note: This object can be updated only during row creation.
Syntax
INTEGER { active(1), invalid(2) }
Access
read-write
Description
The values for
GET
andSET
operations are as follows:
GET: active(1)
- A
GET
operation will retrieve configuration information for the matchingtuxEventClientTbl
row(s).SET: invalid(2)
- A
SET
operation will update configuration information for the row intuxEventClientTbl
. The following state indicates the meaning of atuxEventClientState
set in aSET
request. States not listed may not be set.
invalid(2)
- Delete row. Successful return leaves the row in the
invalid(2)
state.
Syntax
DisplayString
(SIZE
(1..78
))Access
read-only
Description
Send an unsolicited notification message to this client when a matching event is detected.
Note: This object can be updated only during row creation.
This represents a set of subscriptions registered with the Event Broker that trigger execution of system commands.
When an event is detected, it is compared to each row in this table. If the event name matches the value in the event expression and the optional filter rule is true, then the event buffer is formatted and passed to the system's command interpreter.
Create a new Row: To create a new instance of tuxEventCmdTbl
the user must specify at least tuxEventCmdExpr
and tuxEventCmd
. All objects except tuxEventCmdState
can be updated only during creation of a new instance.
Syntax
INTEGER
Access
read-only
Description
A running number as the unique identifier for a row in the table.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-write
Description
Event pattern expression. This expression, in
recomp
(3) format, controls which event names match this subscription.Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-write
Description
Event filter expression. This expression, if present, is evaluated with respect to the posted buffer's contents. It must evaluate to TRUE or this subscription is not matched. If the value of the filter is "-", it means that the filter is in a binary format.
Note: This object can be updated only during row creation.
Syntax
INTEGER { active(1), invalid(2) }
Access
read-write
Description
The values for
GET
andSET
operations are as follows:
GET: active(1)
- A
GET
operation will retrieve configuration information for thetuxEventCmdTbl
instance(s).SET: invalid(2)
- A
SET
operation will update configuration information for thetuxEventCmdTbl
instance. The following state indicates the meaning of atuxEventCmdState
set in aSET
request. States not listed may not be set.
invalid(2)
- Delete
tuxEventCmdTbl
instance. Successful return leaves the object in theinvalid(2)
state.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-write
Description
Execute this system command when an event matching this object is detected. For UNIX system platforms, the command is executed in the background using
system
(3).Note: This object can be updated only during row creation.
This represents a set of subscriptions registered with the Event Broker for queue-based notification.
When an event is detected, it is compared to each tuxEventQueTbl
instance. If the event name matches the value in the event expression and the optional filter rule is true, then the event buffer is stored in the specified reliable queue. To create a new row in this table, it is necessary to issue a SET
request that at least specifies tuxEventQueExpr
, tuxEventQspace
, and tuxEventQname
.
Syntax
INTEGER
Access
read-only
Description
Running number which is the unique identifier for an event in this table.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-write
Description
Event pattern expression. This expression, in
recomp
(3) format, controls which event names match this subscription.Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-write
Description
Event filter expression. This expression, if present, is evaluated with respect to the posted buffer's contents. It must evaluate to TRUE or this subscription is not matched. If the value of this object is "-", it means the filter is in binary format.
Note: This object can be updated only during row creation.
Syntax
INTEGER { active(1), invalid(2) }
Access
read-write
Description
The values for
GET
andSET
operations are as follows:
GET: active(1)
- A
GET
operation will retrieve configuration information for the matchingtuxEventQueTbl
row(s).SET:
invalid(2)
- A
SET
operation will update configuration information for thetuxEventQueTbl
instance. The following state indicates the meaning of atuxEventQueState
set in aSET
request. States not listed may not be set.
invalid(2)
- Delete
tuxEventQueTbl
row. Successful return leaves the object in theinvalid(2)
state.
Syntax
DisplayString
(SIZE
(1..15
))Access
read-write
Description
Enqueue a notification message to a reliable queue in this queue space when a matching event is detected.
Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..15
))Access
read-write
Description
Enqueue a notification message to this reliable queue when a matching event is detected.
Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure to request notification via the /Q subsystem with the message to be placed at the top of the queue.Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure to request notification via the /Q subsystem with the message to be placed on the queue ahead of the specified message.Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure to request notification via the /Q subsystem with the message to be processed at the specified time.Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure to request notification via the /Q subsystem with the message to be processed relative to the dequeue time.Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure.Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure.Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..31
))Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure.Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..31
))Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure.Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..15
))Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure.Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..15
))Access
read-write
Description
This value, if present, is passed in to
tpenqueue
(3)'s TPQCTL control structure.Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
If non-zero, do not cancel this subscription if the designated queue is no longer available.
Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
If non-zero and the client's
tppost
(3) call is transactional, include thetpenqueue
(3) call in the client's transaction.Note: This object can be updated only during row creation.
This represents a set of subscriptions registered with the Event Broker for service-based notification.
When an event is detected, it is compared to each tuxEventSvcTbl
instance. If the event name matches the value in the event expression and the optional filter rule is true, then the event buffer is sent to the specified TUXEDO service routine.
To create a new row in this table, a SET
request must be issued that specifies values for at least tuxEventSvcExpr
and tuxEventSvcName
.
Syntax
INTEGER
Access
read-only
Description
A running number which is a unique key for a row in this table.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-only
Description
Event pattern expression. This expression, in
recomp
(3) format, controls which event names match this subscription.Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-only
Description
Event filter expression. This expression, if present, is evaluated with respect to the posted buffer's contents. It must evaluate to TRUE or this subscription is not matched. If this is "-", it means the filter is in binary format.
Note: This object can be updated only during row creation.
Syntax
INTEGER { active(1), invalid(2) }
Access
read-write
Description
The values for
GET
andSET
operations are as follows:
GET: active(1)
- A
GET
operation will retrieve configuration information for the matchingtuxEventSvcTbl
instance(s).SET:
invalid(2)
- A
SET
operation will update configuration information for thetuxEventSvcTbl
instance. The following state indicates the meaning of atuxEventSvcState
set in aSET
request. States not listed may not be set.
invalid(2)
- Delete
tuxEventSvcTbl
row. Successful return leaves the object in theinvalid(2)
state.
Syntax
DisplayString
(SIZE
(1..15
))Access
read-only
Description
Call this TUXEDO service when a matching event is detected.
Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
If non-zero, do not cancel this subscription if the
tuxEventSvcName
service is no longer available.Note: This object can be updated only during row creation.
Syntax
INTEGER
Access
read-write
Description
If non-zero and the client's
tppost
(3) call is transactional, include thetuxEventSvcName
service call in the client's transaction.Note: This object can be updated only during row creation.
This represents a set of subscriptions registered with the Event Broker for writing system userlog
(3) messages.
When an event is detected, it is compared to each tuxEventUlogTbl
instance. If the event name matches the value in the event expression and the optional filter rule is true, then the event buffer is formatted and passed to the TUXEDO userlog
(3) function.
Create a new Row: To create a new instance of tuxEventUlogTbl
the user must at least specify values for tuxEventUlogExpr
and tuxEventUserlog
. All objects except tuxEventUlogState
can be updated only during creation of a new instance.
Syntax
INTEGER
Access
read-only
Description
A running number which is a unique key in this table.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-write
Description
Event pattern expression. This expression, in
recomp
(3) format, controls which event names match this subscription.Note: This object can be updated only during row creation.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-write
Description
Event filter expression. This expression, if present, is evaluated with respect to the posted buffer's contents. It must evaluate to TRUE or this subscription is not matched. If this is "-", it means the filter is in binary form.
Note: This object can be updated only during row creation.
Syntax
INTEGER { active(1), invalid(2) }
Access
read-write
Description
The values for
GET
andSET
operations are as follows:
GET: active(1)
- A
GET
operation will retrieve configuration information for the matchingtuxEventUlogTbl
instance(s).SET: invalid(2)
- A
SET
operation will update configuration information for thetuxEventUlogTbl
instance. The following state indicates the meaning of atuxEventUlogState
set in aSET
request. States not listed may not be set.
invalid(2)
- Delete
tuxEventUlogTbl
row. Successful return leaves the object in theinvalid(2)
state.
Syntax
DisplayString
(SIZE
(1..255
))Access
read-write
Description
Write a
userlog
(3) message when a matching event is detected.Note: This object can be updated only during row creation.