org.apache.camel.processor

Class PollEnricher

java.lang.Object

org.apache.camel.support.service.ServiceSupport

org.apache.camel.support.AsyncProcessorSupport

org.apache.camel.processor.PollEnricher

All Implemented Interfaces:

org.apache.camel.AsyncProcessor, org.apache.camel.CamelContextAware, org.apache.camel.Processor, org.apache.camel.Service, org.apache.camel.ShutdownableService, org.apache.camel.spi.HasId, org.apache.camel.spi.IdAware, org.apache.camel.StatefulService, org.apache.camel.SuspendableService

public class PollEnricher
extends org.apache.camel.support.AsyncProcessorSupport
implements org.apache.camel.spi.IdAware, org.apache.camel.CamelContextAware

A content enricher that enriches input data by first obtaining additional data from a resource represented by an endpoint producer and second by aggregating input data and additional data. Aggregation of input data and additional data is delegated to an AggregationStrategy object.

Uses a PollingConsumer to obtain the additional data as opposed to Enricher that uses a Producer.

See Also:

Enricher

Field Summary

Fields inherited from class org.apache.camel.support.service.ServiceSupport

FAILED, INITIALIZED, lock, log, NEW, SHUTDOWN, SHUTTINGDOWN, STARTED, STARTING, status, STOPPED, STOPPING, SUSPENDED, SUSPENDING

Constructor Summary

Constructors

Constructor and Description
PollEnricher(org.apache.camel.Expression expression, long timeout) Creates a new PollEnricher.

Method Summary

Modifier and Type	Method and Description
protected void	doShutdown()
protected void	doStart()
protected void	doStop()
org.apache.camel.AggregationStrategy	getAggregationStrategy()
int	getCacheSize()
org.apache.camel.CamelContext	getCamelContext()
org.apache.camel.spi.EndpointUtilizationStatistics	getEndpointUtilizationStatistics()
org.apache.camel.Expression	getExpression()
String	getId()
long	getTimeout()
boolean	isAggregateOnException()
boolean	isIgnoreInvalidEndpoint()
protected void	preCheckPoll(org.apache.camel.Exchange exchange) Strategy to pre check polling.
boolean	process(org.apache.camel.Exchange exchange, org.apache.camel.AsyncCallback callback) Enriches the input data (exchange) by first obtaining additional data from an endpoint represented by an endpoint producer and second by aggregating input data and additional data.
protected org.apache.camel.Endpoint	resolveEndpoint(org.apache.camel.Exchange exchange, Object recipient)
void	setAggregateOnException(boolean aggregateOnException)
void	setAggregationStrategy(org.apache.camel.AggregationStrategy aggregationStrategy) Sets the aggregation strategy for this poll enricher.
void	setCacheSize(int cacheSize)
void	setCamelContext(org.apache.camel.CamelContext camelContext)
void	setDefaultAggregationStrategy() Sets the default aggregation strategy for this poll enricher.
void	setId(String id)
void	setIgnoreInvalidEndpoint(boolean ignoreInvalidEndpoint)
void	setTimeout(long timeout) Sets the timeout to use when polling.
String	toString()

Methods inherited from class org.apache.camel.support.AsyncProcessorSupport

process, processAsync

Methods inherited from class org.apache.camel.support.service.ServiceSupport

doInit, doResume, doSuspend, getStatus, init, isInit, isNew, isRunAllowed, isShutdown, isStarted, isStarting, isStartingOrStarted, isStopped, isStopping, isStoppingOrStopped, isSuspended, isSuspending, isSuspendingOrSuspended, resume, shutdown, start, stop, suspend

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.camel.CamelContextAware

trySetCamelContext

Constructor Detail

PollEnricher

public PollEnricher(org.apache.camel.Expression expression,
                    long timeout)

Creates a new PollEnricher.

Parameters:

expression - expression to use to compute the endpoint to poll from.

timeout - timeout in millis

Method Detail

getCamelContext

public org.apache.camel.CamelContext getCamelContext()

Specified by:

getCamelContext in interface org.apache.camel.CamelContextAware

setCamelContext

public void setCamelContext(org.apache.camel.CamelContext camelContext)

Specified by:

setCamelContext in interface org.apache.camel.CamelContextAware

getId

public String getId()

Specified by:

getId in interface org.apache.camel.spi.HasId

setId

public void setId(String id)

Specified by:

setId in interface org.apache.camel.spi.IdAware

getExpression

public org.apache.camel.Expression getExpression()

getEndpointUtilizationStatistics

public org.apache.camel.spi.EndpointUtilizationStatistics getEndpointUtilizationStatistics()

getAggregationStrategy

public org.apache.camel.AggregationStrategy getAggregationStrategy()

setAggregationStrategy

public void setAggregationStrategy(org.apache.camel.AggregationStrategy aggregationStrategy)

Sets the aggregation strategy for this poll enricher.

Parameters:

aggregationStrategy - the aggregationStrategy to set

getTimeout

public long getTimeout()

setTimeout

public void setTimeout(long timeout)

Sets the timeout to use when polling.

Use 0 to use receiveNoWait, Use -1 to use receive with no timeout (which will block until data is available).

Parameters:

timeout - timeout in millis.

isAggregateOnException

public boolean isAggregateOnException()

setAggregateOnException

public void setAggregateOnException(boolean aggregateOnException)

setDefaultAggregationStrategy

public void setDefaultAggregationStrategy()

Sets the default aggregation strategy for this poll enricher.

getCacheSize

public int getCacheSize()

setCacheSize

public void setCacheSize(int cacheSize)

isIgnoreInvalidEndpoint

public boolean isIgnoreInvalidEndpoint()

setIgnoreInvalidEndpoint

public void setIgnoreInvalidEndpoint(boolean ignoreInvalidEndpoint)

process

public boolean process(org.apache.camel.Exchange exchange,
                       org.apache.camel.AsyncCallback callback)

Enriches the input data (exchange) by first obtaining additional data from an endpoint represented by an endpoint producer and second by aggregating input data and additional data. Aggregation of input data and additional data is delegated to an AggregationStrategy object set at construction time. If the message exchange with the resource endpoint fails then no aggregation will be done and the failed exchange content is copied over to the original message exchange.

Specified by:

process in interface org.apache.camel.AsyncProcessor

Parameters:

exchange - input data.

resolveEndpoint

protected org.apache.camel.Endpoint resolveEndpoint(org.apache.camel.Exchange exchange,
                                                    Object recipient)

preCheckPoll

protected void preCheckPoll(org.apache.camel.Exchange exchange)
                     throws Exception

Strategy to pre check polling.

Is currently used to prevent doing poll enrich from a file based endpoint when the current route also started from a file based endpoint as that is not currently supported.

Parameters:

exchange - the current exchange

Throws:

Exception

toString

public String toString()

Overrides:

toString in class Object

doStart

protected void doStart()
                throws Exception

Overrides:

doStart in class org.apache.camel.support.AsyncProcessorSupport

Throws:

Exception

doStop

protected void doStop()
               throws Exception

Overrides:

doStop in class org.apache.camel.support.AsyncProcessorSupport

Throws:

Exception

doShutdown

protected void doShutdown()
                   throws Exception

Overrides:

doShutdown in class org.apache.camel.support.service.ServiceSupport

Throws:

Exception