org.apache.servicemix.eip.patterns

Class SplitAggregator

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

org.apache.servicemix.eip.patterns.SplitAggregator

All Implemented Interfaces:

Endpoint

Direct Known Subclasses:

RecipientListAggregator

public class SplitAggregator
extends AbstractAggregator

Aggregator can be used to wait and combine several messages. This component implements the Aggregator pattern. This aggregator collect messages with a count, index and correlationId properties. These properties are automatically set by splitters. A timeout may be specified so that the aggregator will not keep data forever if a message is missing.

Version:

$Revision: 376451 $

Author:

gnodet

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	SplitAggregator.SplitterAggregation

Nested classes/interfaces inherited from class org.apache.servicemix.eip.support.AbstractAggregator

AbstractAggregator.ClosedAggregateException

Field Summary

Fields

Modifier and Type	Field and Description
protected javax.xml.namespace.QName	aggregateElementName
protected org.apache.servicemix.expression.Expression	corrId
protected org.apache.servicemix.expression.Expression	count
protected java.lang.String	countAttribute
protected org.apache.servicemix.expression.Expression	index
protected java.lang.String	indexAttribute
protected javax.xml.namespace.QName	messageElementName
protected long	timeout

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
SplitAggregator()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	addMessage(java.lang.Object aggregation, javax.jbi.messaging.NormalizedMessage message, javax.jbi.messaging.MessageExchange exchange) Add a newly received message to this aggregation
void	buildAggregate(java.lang.Object aggregation, javax.jbi.messaging.NormalizedMessage message, javax.jbi.messaging.MessageExchange exchange, boolean doTimeout) Fill the given JBI message with the aggregation result.
java.lang.Object	createAggregation(java.lang.String correlationID) Creates a new empty aggregation.
protected org.w3c.dom.Element	createChildElement(javax.xml.namespace.QName name, org.w3c.dom.Node parent)
javax.xml.namespace.QName	getAggregateElementName()
java.lang.String	getCorrelationID(javax.jbi.messaging.MessageExchange exchange, javax.jbi.messaging.NormalizedMessage message) Retrieve the correlation ID of the given exchange
org.apache.servicemix.expression.Expression	getCorrId()
org.apache.servicemix.expression.Expression	getCount()
java.lang.String	getCountAttribute()
org.apache.servicemix.expression.Expression	getIndex()
java.lang.String	getIndexAttribute()
javax.xml.namespace.QName	getMessageElementName()
long	getTimeout()
java.util.Date	getTimeout(java.lang.Object aggregation) 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.
void	setAggregateElementName(javax.xml.namespace.QName aggregateElementName) The qualified name that will be used as the root xml element when building the aggregate.
void	setCorrId(org.apache.servicemix.expression.Expression corrId) An expression used to compute the correlation ids of incoming messages to find related messages.
void	setCount(org.apache.servicemix.expression.Expression count) An expression used to compute the total number of message that the aggregate will contain.
void	setCountAttribute(java.lang.String countAttribute) The name of the xml attribute attached to the root element that will contain the number of messages in this aggregate.
void	setIndex(org.apache.servicemix.expression.Expression index) An expression used to compute the index of this message in the aggregate.
void	setIndexAttribute(java.lang.String indexAttribute) The name of the xml attribute attached to the message element that will contain the index of messages in this aggregate.
void	setMessageElementName(javax.xml.namespace.QName messageElementName) The qualified name of the xml element used to embed each message when building the aggregated message.
void	setTimeout(long timeout) The maximum amount of time (in milliseconds) that can elapse between messages for a single aggregate.

Methods inherited from class org.apache.servicemix.eip.support.AbstractAggregator

closeAggregation, getClosedAggregatesStoreFactory, getTarget, isAggregationClosed, isCopyAttachments, isCopyProperties, isReportClosedAggregatesAsErrors, isReportErrors, isReportTimeoutAsErrors, isRescheduleTimeouts, isSynchronous, onTimeout, process, processAsync, processSync, sendAggregate, setClosedAggregatesStoreFactory, setCopyAttachments, setCopyProperties, setReportClosedAggregatesAsErrors, setReportErrors, setReportTimeoutAsErrors, setRescheduleTimeouts, setSynchronous, setTarget, 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

Field Detail

count

protected org.apache.servicemix.expression.Expression count

index

protected org.apache.servicemix.expression.Expression index

corrId

protected org.apache.servicemix.expression.Expression corrId

aggregateElementName

protected javax.xml.namespace.QName aggregateElementName

messageElementName

protected javax.xml.namespace.QName messageElementName

countAttribute

protected java.lang.String countAttribute

indexAttribute

protected java.lang.String indexAttribute

timeout

protected long timeout

Constructor Detail

SplitAggregator

public SplitAggregator()

Method Detail

getAggregateElementName

public javax.xml.namespace.QName getAggregateElementName()

Returns:

the aggregateElementName

setAggregateElementName

public void setAggregateElementName(javax.xml.namespace.QName aggregateElementName)

The qualified name that will be used as the root xml element when building the aggregate. Messages contents will be appended to this root element as direct children or inside an element dependending on the messageElementName property.

Parameters:

aggregateElementName - the aggregateElementName to set

getCorrId

public org.apache.servicemix.expression.Expression getCorrId()

Returns:

the corrId

setCorrId

public void setCorrId(org.apache.servicemix.expression.Expression corrId)

An expression used to compute the correlation ids of incoming messages to find related messages. The default value is to retrieve the same property as the splitter.

Parameters:

corrId - the corrId to set

getCount

public org.apache.servicemix.expression.Expression getCount()

Returns:

the count

setCount

public void setCount(org.apache.servicemix.expression.Expression count)

An expression used to compute the total number of message that the aggregate will contain. The default value is to retrieve the same property as the splitter. This property is evaluated on each incoming message and must always have the same value for all messages in the same aggregate.

Parameters:

count - the count to set

getCountAttribute

public java.lang.String getCountAttribute()

Returns:

the countAttribute

setCountAttribute

public void setCountAttribute(java.lang.String countAttribute)

The name of the xml attribute attached to the root element that will contain the number of messages in this aggregate.

Parameters:

countAttribute - the countAttribute to set

getIndex

public org.apache.servicemix.expression.Expression getIndex()

Returns:

the index

setIndex

public void setIndex(org.apache.servicemix.expression.Expression index)

An expression used to compute the index of this message in the aggregate. For a given message, the index must be unique within the aggregate and must range between 0 and count - 1 included.

Parameters:

index - the index to set

getIndexAttribute

public java.lang.String getIndexAttribute()

Returns:

the indexAttribute

setIndexAttribute

public void setIndexAttribute(java.lang.String indexAttribute)

The name of the xml attribute attached to the message element that will contain the index of messages in this aggregate.

Parameters:

indexAttribute - the indexAttribute to set

getMessageElementName

public javax.xml.namespace.QName getMessageElementName()

Returns:

the messageElementName

setMessageElementName

public void setMessageElementName(javax.xml.namespace.QName messageElementName)

The qualified name of the xml element used to embed each message when building the aggregated message. If null, messages contents will be appended directly as children of the root element.

Parameters:

messageElementName - the messageElementName to set

getTimeout

public long getTimeout()

Returns:

the timeout

setTimeout

public void setTimeout(long timeout)

The maximum amount of time (in milliseconds) that can elapse between messages for a single aggregate. The default value is 0 which means that the timeout is not used at all.

Parameters:

timeout - the timeout to set

createAggregation

public java.lang.Object createAggregation(java.lang.String correlationID)

Description copied from class: AbstractAggregator

Creates a new empty aggregation.

Specified by:

createAggregation in class AbstractAggregator

Returns:

a newly created aggregation

getCorrelationID

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

Description copied from class: AbstractAggregator

Retrieve the correlation ID of the given exchange

Specified by:

getCorrelationID in class AbstractAggregator

Returns:

the correlationID

Throws:

java.lang.Exception

addMessage

public boolean addMessage(java.lang.Object aggregation,
                 javax.jbi.messaging.NormalizedMessage message,
                 javax.jbi.messaging.MessageExchange exchange)
                   throws java.lang.Exception

Description copied from class: AbstractAggregator

Add a newly received message to this aggregation

Specified by:

addMessage in class AbstractAggregator

Returns:

true if the aggregate id complete

Throws:

java.lang.Exception

buildAggregate

public void buildAggregate(java.lang.Object aggregation,
                  javax.jbi.messaging.NormalizedMessage message,
                  javax.jbi.messaging.MessageExchange exchange,
                  boolean doTimeout)
                    throws java.lang.Exception

Description copied from class: AbstractAggregator

Fill the given JBI message with the aggregation result.

Specified by:

buildAggregate in class AbstractAggregator

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

Throws:

java.lang.Exception

createChildElement

protected org.w3c.dom.Element createChildElement(javax.xml.namespace.QName name,
                                     org.w3c.dom.Node parent)

getTimeout

public java.util.Date getTimeout(java.lang.Object aggregation)

Description copied from class: AbstractAggregator

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.

Specified by:

getTimeout in class AbstractAggregator

Returns: