org.apache.servicemix.eip.support

Class AbstractAggregator

java.lang.Object

org.apache.servicemix.common.endpoints.AbstractEndpoint

org.apache.servicemix.common.endpoints.SimpleEndpoint

org.apache.servicemix.common.endpoints.ProviderEndpoint

org.apache.servicemix.eip.EIPEndpoint

org.apache.servicemix.eip.support.AbstractAggregator

All Implemented Interfaces:

Endpoint

Direct Known Subclasses:

SplitAggregator

public abstract class AbstractAggregator
extends EIPEndpoint

Aggregator can be used to wait and combine several messages. This component implements the Aggregator pattern. Closed aggregations are being kept in a Store. By default, we will use a simple MemoryStore, but you can set your own StoreFactory to use other implementations. TODO: distributed lock manager TODO: persistent / transactional timer

Version:

$Revision: 376451 $

Author:

gnodet

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AbstractAggregator.ClosedAggregateException Error used to report that the aggregate has already been closed

Field Summary

Fields inherited from class org.apache.servicemix.eip.EIPEndpoint

lockManager, store, storeFactory, timerManager, wsdlExchangeTarget, wsdlResource

Fields inherited from class org.apache.servicemix.common.endpoints.AbstractEndpoint

definition, description, endpoint, interfaceName, service, serviceUnit

Constructor Summary

Constructors

Constructor and Description
AbstractAggregator()

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract boolean	addMessage(java.lang.Object aggregate, javax.jbi.messaging.NormalizedMessage message, javax.jbi.messaging.MessageExchange exchange) Add a newly received message to this aggregation
protected abstract void	buildAggregate(java.lang.Object aggregate, javax.jbi.messaging.NormalizedMessage message, javax.jbi.messaging.MessageExchange exchange, boolean timeout) Fill the given JBI message with the aggregation result.
protected void	closeAggregation(java.lang.String correlationId) Mark an aggregation as closed
protected abstract java.lang.Object	createAggregation(java.lang.String correlationID) Creates a new empty aggregation.
org.apache.servicemix.store.StoreFactory	getClosedAggregatesStoreFactory() Access the currently configured StoreFactory for storing closed aggregations
protected abstract java.lang.String	getCorrelationID(javax.jbi.messaging.MessageExchange exchange, javax.jbi.messaging.NormalizedMessage message) Retrieve the correlation ID of the given exchange
ExchangeTarget	getTarget()
protected abstract java.util.Date	getTimeout(java.lang.Object aggregate) Returns the date when the onTimeout method should be called if the aggregation is not completed yet, or null if the aggregation has no timeout.
protected boolean	isAggregationClosed(java.lang.String correlationId) Check if the aggregation with the given correlation id is closed or not.
boolean	isCopyAttachments()
boolean	isCopyProperties()
boolean	isReportClosedAggregatesAsErrors()
boolean	isReportErrors()
boolean	isReportTimeoutAsErrors()
boolean	isRescheduleTimeouts()
boolean	isSynchronous()
protected void	onTimeout(java.lang.String processCorrelationId, java.lang.String correlationId, org.apache.servicemix.timers.Timer timer)
void	process(javax.jbi.messaging.MessageExchange exchange)
protected void	processAsync(javax.jbi.messaging.MessageExchange exchange)
protected void	processSync(javax.jbi.messaging.MessageExchange exchange)
protected void	sendAggregate(java.lang.String processCorrelationId, java.lang.String correlationId, java.lang.Object aggregation, boolean timeout, boolean sync)
void	setClosedAggregatesStoreFactory(org.apache.servicemix.store.StoreFactory closedAggregatesStoreFactory) Set a new StoreFactory for creating the Store to hold closed aggregations.
void	setCopyAttachments(boolean copyAttachments) Copy all attachments from the incoming messages to the aggregated message.
void	setCopyProperties(boolean copyProperties) Copy all properties from the incoming messages to the aggregated message.
void	setReportClosedAggregatesAsErrors(boolean reportClosedAggregatesAsErrors) Sets whether the aggregator should report errors on incoming exchanges received after a given aggregate has been closed.
void	setReportErrors(boolean reportErrors) Sets whether the aggregator should report errors happening when sending the aggregate on all exchanges that compose the aggregate.
void	setReportTimeoutAsErrors(boolean reportTimeoutAsErrors) Sets whether the aggregator should reports errors on incoming exchanges already received when a timeout occurs.
void	setRescheduleTimeouts(boolean rescheduleTimeouts) Boolean flag controlling if aggregate timeouts are rescheduled each time a new message is added to the aggregate.
void	setSynchronous(boolean synchronous) Boolean flag that Controls whether the aggregate (when ready) will be sent synchronously or not.
void	setTarget(ExchangeTarget target) The exchange target that will be used to send the aggregate to.
void	start()

Methods inherited from class org.apache.servicemix.eip.EIPEndpoint

chooseFirstEndpointWithDescriptor, copyAttachments, copyProperties, getDefinition, getDefinitionFromDescription, getDefinitionFromWsdlExchangeTarget, getDefinitionFromWsdlResource, getDescription, getDescriptionForExchangeTarget, getEndpointsForExchangeTarget, getLockManager, getStore, getStoreFactory, getTimerManager, getWsdlExchangeTarget, getWsdlResource, setLockManager, setStore, setStoreFactory, setTimerManager, setWsdlExchangeTarget, setWsdlResource, stop

Methods inherited from class org.apache.servicemix.common.endpoints.ProviderEndpoint

activate, deactivate, getRole, processInOnly, processInOut

Methods inherited from class org.apache.servicemix.common.endpoints.SimpleEndpoint

done, fail, getChannel, getContext, getExchangeFactory, send, sendSync

Methods inherited from class org.apache.servicemix.common.endpoints.AbstractEndpoint

getEndpoint, getInterfaceName, getKey, getService, getServiceUnit, isExchangeOkay, prepareExchange, setDefinition, setDescription, setEndpoint, setInterfaceName, setService, setServiceUnit, toString, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractAggregator

public AbstractAggregator()

Method Detail

isSynchronous

public boolean isSynchronous()

Returns:

the synchronous

setSynchronous

public void setSynchronous(boolean synchronous)

Boolean flag that Controls whether the aggregate (when ready) will be sent synchronously or not. On ServiceMix 3.x, this can have an effect upon the flow and transaction semantics. The default value is false.

Parameters:

synchronous - the synchronous to set

isRescheduleTimeouts

public boolean isRescheduleTimeouts()

Returns:

the rescheduleTimeouts

setRescheduleTimeouts

public void setRescheduleTimeouts(boolean rescheduleTimeouts)

Boolean flag controlling if aggregate timeouts are rescheduled each time a new message is added to the aggregate. If false, the timeout will expire when the specified amount of time elapsed after the first message is received for this aggregate. If true, the timeout will expire when the specified amount of time elapsed after the last message is received. The default value is false.

Parameters:

rescheduleTimeouts - the rescheduleTimeouts to set

getTarget

public ExchangeTarget getTarget()

Returns:

the target

setTarget

public void setTarget(ExchangeTarget target)

The exchange target that will be used to send the aggregate to.

Parameters:

target - the target to set

isCopyProperties

public boolean isCopyProperties()

setCopyProperties

public void setCopyProperties(boolean copyProperties)

Copy all properties from the incoming messages to the aggregated message. Default value is true.

Parameters:

copyProperties -

isCopyAttachments

public boolean isCopyAttachments()

setCopyAttachments

public void setCopyAttachments(boolean copyAttachments)

Copy all attachments from the incoming messages to the aggregated message. Default value is true.

Parameters:

copyAttachments -

isReportErrors

public boolean isReportErrors()

setReportErrors

public void setReportErrors(boolean reportErrors)

Sets whether the aggregator should report errors happening when sending the aggregate on all exchanges that compose the aggregate. The default value is false, meaning that if any error occur, this error will be lost. Note that if this flag is set to true, all exchanges received as part of a given aggregate will be hold until the aggregate is sent and the DONE / ERROR status is received back.

Parameters:

reportErrors - boolean indicating if errors should be reported back to consumers

isReportClosedAggregatesAsErrors

public boolean isReportClosedAggregatesAsErrors()

setReportClosedAggregatesAsErrors

public void setReportClosedAggregatesAsErrors(boolean reportClosedAggregatesAsErrors)

Sets whether the aggregator should report errors on incoming exchanges received after a given aggregate has been closed. The default value is false, meaning that such exchanges will be silently sent back with a DONE status and discarded with respect to the aggregation process.

Parameters:

reportClosedAggregatesAsErrors - boolean indicating if exchanges received for a closed aggregates should be send back with an ERROR status

setReportTimeoutAsErrors

public void setReportTimeoutAsErrors(boolean reportTimeoutAsErrors)

Sets whether the aggregator should reports errors on incoming exchanges already received when a timeout occurs. The default value is false, meaning that such exchanges will be silently sent back a DONE status.

Parameters:

reportTimeoutAsErrors - boolean indicating if exchanges received prior to a timeout should be sent back with an ERROR status

isReportTimeoutAsErrors

public boolean isReportTimeoutAsErrors()

Returns:

the reportTimeoutAsErrors

processSync

protected void processSync(javax.jbi.messaging.MessageExchange exchange)
                    throws java.lang.Exception

Specified by:

processSync in class EIPEndpoint

Throws:

java.lang.Exception

getClosedAggregatesStoreFactory

public org.apache.servicemix.store.StoreFactory getClosedAggregatesStoreFactory()

Access the currently configured StoreFactory for storing closed aggregations

setClosedAggregatesStoreFactory

public void setClosedAggregatesStoreFactory(org.apache.servicemix.store.StoreFactory closedAggregatesStoreFactory)

Set a new StoreFactory for creating the Store to hold closed aggregations. If it hasn't been set, a simple MemoryStoreFactory will be used by default.

Parameters:

closedAggregatesStoreFactory -

processAsync

protected void processAsync(javax.jbi.messaging.MessageExchange exchange)
                     throws java.lang.Exception

Specified by:

processAsync in class EIPEndpoint

Throws:

java.lang.Exception

start

public void start()
           throws java.lang.Exception

Specified by:

start in interface Endpoint

Overrides:

start in class EIPEndpoint

Throws:

java.lang.Exception

process

public void process(javax.jbi.messaging.MessageExchange exchange)
             throws java.lang.Exception

Specified by:

process in interface Endpoint

Overrides:

process in class EIPEndpoint

Throws:

java.lang.Exception

sendAggregate

protected void sendAggregate(java.lang.String processCorrelationId,
                 java.lang.String correlationId,
                 java.lang.Object aggregation,
                 boolean timeout,
                 boolean sync)
                      throws java.lang.Exception

Throws:

java.lang.Exception

onTimeout

protected void onTimeout(java.lang.String processCorrelationId,
             java.lang.String correlationId,
             org.apache.servicemix.timers.Timer timer)

isAggregationClosed

protected boolean isAggregationClosed(java.lang.String correlationId)
                               throws java.lang.Exception

Check if the aggregation with the given correlation id is closed or not. Called when the aggregation has not been found in the store.

Parameters:

correlationId -

Returns:

Throws:

java.lang.Exception

closeAggregation

protected void closeAggregation(java.lang.String correlationId)
                         throws java.lang.Exception

Mark an aggregation as closed

Parameters:

correlationId -

Throws:

java.lang.Exception

getCorrelationID

protected abstract java.lang.String getCorrelationID(javax.jbi.messaging.MessageExchange exchange,
                                javax.jbi.messaging.NormalizedMessage message)
                                              throws java.lang.Exception

Retrieve the correlation ID of the given exchange

Parameters:

exchange -

message -

Returns:

the correlationID

Throws:

java.lang.Exception

createAggregation

protected abstract java.lang.Object createAggregation(java.lang.String correlationID)
                                               throws java.lang.Exception

Creates a new empty aggregation.

Parameters:

correlationID -

Returns:

a newly created aggregation

Throws:

java.lang.Exception

getTimeout

protected abstract java.util.Date getTimeout(java.lang.Object aggregate)

Returns the date when the onTimeout method should be called if the aggregation is not completed yet, or null if the aggregation has no timeout.

Parameters:

aggregate -

Returns:

addMessage

protected abstract boolean addMessage(java.lang.Object aggregate,
                 javax.jbi.messaging.NormalizedMessage message,
                 javax.jbi.messaging.MessageExchange exchange)
                               throws java.lang.Exception

Add a newly received message to this aggregation

Parameters:

aggregate -

message -

exchange -

Returns:

true if the aggregate id complete

Throws:

java.lang.Exception

buildAggregate

protected abstract void buildAggregate(java.lang.Object aggregate,
                  javax.jbi.messaging.NormalizedMessage message,
                  javax.jbi.messaging.MessageExchange exchange,
                  boolean timeout)
                                throws java.lang.Exception

Fill the given JBI message with the aggregation result.

Parameters:

aggregate -

message -

exchange -

timeout - false if the aggregation has completed or true if this aggregation has timed out

Throws:

java.lang.Exception