org.apache.synapse.message.store.impl.resequencer

Class ResequenceMessageStore

java.lang.Object

org.apache.synapse.message.store.AbstractMessageStore

org.apache.synapse.message.store.impl.jdbc.JDBCMessageStore

org.apache.synapse.message.store.impl.resequencer.ResequenceMessageStore

All Implemented Interfaces:

ManagedLifecycle, MessageStore, Nameable, SynapseArtifact

public class ResequenceMessageStore
extends JDBCMessageStore

This represents the store which will allow to re-sequence messages.

See Also:

JDBCMessageStore

Field Summary

Fields inherited from class org.apache.synapse.message.store.impl.jdbc.JDBCMessageStore

MESSAGE_COLUMN_NAME

Fields inherited from class org.apache.synapse.message.store.AbstractMessageStore

description, fileName, lock, messageStoreMBean, messageStoreObservers, name, parameterKeyMap, parameters, sequence, synapseConfiguration, synapseEnvironment

Constructor Summary

Constructors

Constructor and Description
ResequenceMessageStore()

Method Summary

Modifier and Type	Method and Description
protected Statement	getStoreMessageStatement(MessageContext context, Long sequenceId) Stores message in database by providing the correct sequence id.
void	init(SynapseEnvironment synapseEnvironment) Initializes the JDBC Message Store
MessageContext	peek() Select and return the first element in current table
protected List<Statement>	removeMessageStatement(String msgId) Remove message statement.
void	setParameters(Map<String,Object> parameters) Set JDBC store parameters

Methods inherited from class org.apache.synapse.message.store.impl.jdbc.JDBCMessageStore

clear, deserializeMessage, destroy, get, get, getAll, getConsumer, getJdbcConfiguration, getProcessedRows, getProducer, messageContentResultSet, remove, remove, serialize, size, store

Methods inherited from class org.apache.synapse.message.store.AbstractMessageStore

addParameter, addParameterKey, dequeued, difference, enqueued, getArtifactContainerName, getDescription, getFileName, getLock, getName, getParameterKey, getParameterKeyMap, getParameters, getType, isEdited, nextConsumerId, nextProducerId, notifyMessageAddition, notifyMessageRemoval, registerObserver, setArtifactContainerName, setDescription, setFileName, setIsEdited, setName, unregisterObserver

Methods inherited from class java.lang.Object

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

Constructor Detail

ResequenceMessageStore

public ResequenceMessageStore()

Method Detail

setParameters

public void setParameters(Map<String,Object> parameters)

Set JDBC store parameters

Specified by:

setParameters in interface MessageStore

Overrides:

setParameters in class JDBCMessageStore

Parameters:

parameters - - List of parameters to set

init

public void init(SynapseEnvironment synapseEnvironment)

Initializes the JDBC Message Store

Specified by:

init in interface ManagedLifecycle

Overrides:

init in class JDBCMessageStore

Parameters:

synapseEnvironment - SynapseEnvironment for the store

removeMessageStatement

protected List<Statement> removeMessageStatement(String msgId)

Remove message statement.

When re-sequenced we need to maintain the last processed id along with the removal. So that at an event the node crashes we know where to start from.

Statement to remove the message once a response is received.

Overrides:

removeMessageStatement in class JDBCMessageStore

Parameters:

msgId - message id of the statement which should be removed.

Returns:

the sql remove message statement.

getStoreMessageStatement

protected Statement getStoreMessageStatement(MessageContext context,
                                             Long sequenceId)
                                      throws StoreException

Stores message in database by providing the correct sequence id.

Generates the statement to store message in database.

If the sequence id is specified the corresponding sequence id will be stored, sequence id will be specified if re-sequence message store is being used. In other times this value will be null.

Overrides:

getStoreMessageStatement in class JDBCMessageStore

Parameters:

context - the content of the message.

sequenceId - the sequence id of the message (optional).

Returns:

SQL statement for insertion of value to store.

Throws:

StoreException - at an event there's an exception when generating the statement.

See Also:

ResequenceMessageStore

peek

public MessageContext peek()
                    throws SynapseException

Select and return the first element in current table

Overrides:

peek in class JDBCMessageStore

Returns:

- Select and return the first element from the table

Throws:

SynapseException