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oracle.streams
Class AbstractLCR

java.lang.Object
oracle.streams.AbstractLCR

All Implemented Interfaces:

LCR

Direct Known Subclasses:

DefaultDDLLCR, DefaultRowLCR

public abstract class AbstractLCR

extends java.lang.Object

implements LCR

The AbstractLCR class provides an abstract implementation of the LCR interface. This class encapsulates the methods and attributes of the LCR message type defined by Oracle Streams. It is the super class for all Oracle Streams default LCR types, including DefaultRowLCR and DefaultDDLLCR.

See Also:

RowLCR, DDLLCR

Constructor Summary

AbstractLCR()

Method Summary

java.lang.Object	getAttribute(java.lang.Object attributeName) Gets the attribute by specifying the attribute name.
java.lang.Object	getAttributeName(int index) Gets the attribute name in the LCR attributes list by position.
java.lang.Object[]	getAttributesList() Gets the list of attribute name and value pairs in the LCR.
java.lang.Object	getAttributeValue(int index) Gets the attribute value in the LCR attributes list by position.
java.lang.String	getCommandType() Gets the LCR command type executed in the DML or DDL statement.
oracle.sql.NUMBER	getCommitSCN() Gets the LCR commit system change number (SCN) in the format of oracle.sql.NUMBER.
java.lang.String	getMessageTrackingLabel() Gets the message tracking label of the LCR.
int	getNumAttributes() Gets the total number of attributes in the LCR.
java.lang.String	getObjectName() Gets the name of the object that is changed by the LCR.
java.lang.String	getObjectOwner() Gets the owner of the object that is changed by the LCR.
byte[]	getPosition() Gets the position of the current LCR.
oracle.sql.NUMBER	getSCN() Gets the SCN of the current LCR in the format of oracle.sql.NUMBER.
java.lang.String	getSourceDatabaseName() Gets the global name of the source database.
oracle.sql.DATE	getSourceTime() Gets the time when the LCR was created.
byte[]	getTag() Gets the tag for the LCR.
java.lang.String	getTransactionId() Gets the transaction identifier of the LCR.
void	setAttribute(java.lang.Object attributeName, java.lang.Object attributeValue) Sets attribute by providing the name and value pair; the name is used as the hash key.
void	setCommandType(java.lang.String commandType) Sets the command type in the LCR.
void	setMessageTrackingLabel(java.lang.String messageTrackingLabel) Sets the message tracking label of the LCR.
void	setObjectName(java.lang.String objectName) Sets the name of the object that is changed by the LCR.
void	setObjectOwner(java.lang.String objectOwner) Sets the owner of the object that is changed by the LCR .
void	setPosition(byte[] position) Sets the position in the LCR.
void	setSourceDatabaseName(java.lang.String name) Sets the source database name of the object that is changed by the LCR.
void	setSourceTime(oracle.sql.DATE sourceTime) Sets the source timestamp when the LCR was created.
void	setTag(byte[] tag) Sets the LCR tag information.
void	setTransactionId(java.lang.String transactionId) Sets the transaction identifier for the LCR.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractLCR

public AbstractLCR()

Method Detail

setSourceDatabaseName

public void setSourceDatabaseName(java.lang.String name)

Sets the source database name of the object that is changed by the LCR.

The source database is the database where the change originated.

Specified by:

setSourceDatabaseName in interface LCR

Parameters:

name - The source database name in String format. Set this parameter to a non-NULL value.

setCommandType

public void setCommandType(java.lang.String commandType)

Sets the command type in the LCR.
See Oracle Call Interface reference manual for complete command type definition.

Specified by:

setCommandType in interface LCR

Parameters:

commandType - The command type of an LCR. Set this parameter to a non-NULL value.

setObjectOwner

public void setObjectOwner(java.lang.String objectOwner)

Sets the owner of the object that is changed by the LCR .

Specified by:

setObjectOwner in interface LCR

Parameters:

objectOwner - The object owner. Set this parameter to a non-NULL value.

setObjectName

public void setObjectName(java.lang.String objectName)

Sets the name of the object that is changed by the LCR.

Specified by:

setObjectName in interface LCR

Parameters:

objectName - The name of the database object. Set this parameter to a non-NULL value.

setTag

public void setTag(byte[] tag)

Sets the LCR tag information.
A binary tag that enables tracking of the LCR. For example, this tag can be used to determine the original source database of the DML or DDL statement when apply forwarding is used.
See "Oracle Streams Replication Administrator's Guide" for more information about tags

Specified by:

setTag in interface LCR

Parameters:

tag - A binary tag that enables tracking of the LCR.

setPosition

public void setPosition(byte[] position)

Sets the position in the LCR.
The position uniquely identifies each LCR in an LCR stream.

Specified by:

setPosition in interface LCR

Parameters:

position - A byte array that represents the LCR position. Set this parameter to a non-NULL value and ensure that the position is byte comparable and is strictly increasing.

setTransactionId

public void setTransactionId(java.lang.String transactionId)

Sets the transaction identifier for the LCR.
See Oracle Call Interface reference manual for the format of transactionId.

Specified by:

setTransactionId in interface LCR

Parameters:

transactionId - The identifier of the transaction

setSourceTime

public void setSourceTime(oracle.sql.DATE sourceTime)

Sets the source timestamp when the LCR was created.
The source time is the time when the change in an LCR captured by a capture process was generated in the redo log of the source database, or the time when a persistent LCR was created.

Specified by:

setSourceTime in interface LCR

Parameters:

sourceTime - The srouce time in the form of oracle.sql.DATE

setAttribute

public void setAttribute(java.lang.Object attributeName,
                         java.lang.Object attributeValue)

Sets attribute by providing the name and value pair; the name is used as the hash key.
This method sets the attributes in an LCR.

Specified by:

setAttribute in interface LCR

Parameters:

attributeName - The name of the attribute

attributeValue - The value of the attribute

setMessageTrackingLabel

public void setMessageTrackingLabel(java.lang.String messageTrackingLabel)
                             throws StreamsException

Sets the message tracking label of the LCR.
You can use the SET_MESSAGE_TRACKING procedure in the DBMS_STREAMS_ADM package to track an LCR as it flows through a stream. See Oracle Streams Replication Administrator's Guide for information about setting message tracking labels.

Parameters:

messageTrackingLabel - The message tracking label

Throws:

StreamsException - If error occurs when obtaining message tracking label

getSourceDatabaseName

public java.lang.String getSourceDatabaseName()

Gets the global name of the source database.
The source database is the database where the change originated.

Specified by:

getSourceDatabaseName in interface LCR

Returns:

A string containing source database name

getCommandType

public java.lang.String getCommandType()

Gets the LCR command type executed in the DML or DDL statement. See Oracle Call Interface reference manual for complete command type definition.

Specified by:

getCommandType in interface LCR

Returns:

A string containing comand type

getObjectOwner

public java.lang.String getObjectOwner()

Gets the owner of the object that is changed by the LCR.
The owner is the user who owns the object on which the row change ocurred or the DDL statement was executed.

Specified by:

getObjectOwner in interface LCR

Returns:

A string containing the owner

getObjectName

public java.lang.String getObjectName()

Gets the name of the object that is changed by the LCR.
The name of the database object on which the DDL or DML statement was executed.

Specified by:

getObjectName in interface LCR

Returns:

A string containing the name

getTag

public byte[] getTag()

Gets the tag for the LCR.
A binary tag that enables tracking of the LCR. For example, this tag can be used to determine the original source database of the DML or DDL statement when apply forwarding is used.

Specified by:

getTag in interface LCR

Returns:

A byte array that represents the tag

getPosition

public byte[] getPosition()

Gets the position of the current LCR.
A byte array that uniquely identifies an LCR in the stream and is in strictly increasing order.

Specified by:

getPosition in interface LCR

Returns:

A byte array that represents the LCR position

getTransactionId

public java.lang.String getTransactionId()

Gets the transaction identifier of the LCR.
See Oracle Call Interface reference manual for the format of transactionId.

Specified by:

getTransactionId in interface LCR

Returns:

A string containing the transaction id

getSourceTime

public oracle.sql.DATE getSourceTime()

Gets the time when the LCR was created.
Source time is the timestamp when the LCR was generated at source database.

Specified by:

getSourceTime in interface LCR

Returns:

The source time object, an instance of oracle.sql.DATE.

getAttribute

public java.lang.Object getAttribute(java.lang.Object attributeName)

Gets the attribute by specifying the attribute name.
This method gets the attributes in an LCR.

Specified by:

getAttribute in interface LCR

Parameters:

attributeName - The attribute name

Returns:

The attribte value object

getSCN

public oracle.sql.NUMBER getSCN()

Gets the SCN of the current LCR in the format of oracle.sql.NUMBER.
The LCR SCN is the system change number when the LCR is generated at source database.

Returns:

The SCN in the format of oracle.sql.NUMBER.

getCommitSCN

public oracle.sql.NUMBER getCommitSCN()

Gets the LCR commit system change number (SCN) in the format of oracle.sql.NUMBER.
The LCR commit SCN is the SCN when the transaction to which the LCR belongs committed at the source database.

Returns:

The commit SCN in the format of oracle.sql.NUMBER.

getNumAttributes

public int getNumAttributes()

Gets the total number of attributes in the LCR.

Returns:

The total number of attributes.

getAttributesList

public java.lang.Object[] getAttributesList()

Gets the list of attribute name and value pairs in the LCR.

Returns:

An array of attribute entries.

getAttributeName

public java.lang.Object getAttributeName(int index)

Gets the attribute name in the LCR attributes list by position.

Returns:

The attribute name

getAttributeValue

public java.lang.Object getAttributeValue(int index)

Gets the attribute value in the LCR attributes list by position.

Returns:

The attribute value

getMessageTrackingLabel

public java.lang.String getMessageTrackingLabel()
                                         throws StreamsException

Gets the message tracking label of the LCR.
You can use the SET_MESSAGE_TRACKING procedure in the DBMS_STREAMS_ADM package to track an LCR as it flows through a stream. See Oracle Streams Replication Administrator's Guide for information about setting message tracking labels.

Returns:

A string contains the message tracking label

Throws:

StreamsException - If error occurs when obtaining message tracking label

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