org.mule.DefaultMuleEventContext Maven / Gradle / Ivy
/*
* $Id: DefaultMuleEventContext.java 20385 2010-11-29 20:25:26Z dfeist $
* --------------------------------------------------------------------------------------
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
*
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule;
import org.mule.api.FutureMessageResult;
import org.mule.api.MessagingException;
import org.mule.api.MuleContext;
import org.mule.api.MuleEvent;
import org.mule.api.MuleEventContext;
import org.mule.api.MuleException;
import org.mule.api.MuleMessage;
import org.mule.api.MuleSession;
import org.mule.api.client.LocalMuleClient;
import org.mule.api.config.MuleProperties;
import org.mule.api.construct.FlowConstruct;
import org.mule.api.endpoint.EndpointBuilder;
import org.mule.api.endpoint.EndpointNotFoundException;
import org.mule.api.endpoint.EndpointURI;
import org.mule.api.endpoint.InboundEndpoint;
import org.mule.api.endpoint.OutboundEndpoint;
import org.mule.api.processor.MessageProcessor;
import org.mule.api.service.Service;
import org.mule.api.transaction.Transaction;
import org.mule.api.transaction.TransactionException;
import org.mule.api.transformer.DataType;
import org.mule.api.transformer.TransformerException;
import org.mule.config.i18n.CoreMessages;
import org.mule.endpoint.EndpointURIEndpointBuilder;
import org.mule.endpoint.URIBuilder;
import org.mule.transaction.TransactionCoordination;
import org.mule.transformer.types.DataTypeFactory;
import java.io.OutputStream;
import edu.emory.mathcs.backport.java.util.concurrent.Callable;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* DefaultMuleEventContext is the context object for the current
* request. Using the context, developers can send/dispatch/receive events
* programmatically as well as manage transactions.
*/
public class DefaultMuleEventContext implements MuleEventContext
{
/**
* logger used by this class
*/
protected static final Log logger = LogFactory.getLog(DefaultMuleEventContext.class);
private final MuleEvent event;
private final MuleSession session;
private final MuleContext muleContext;
private final LocalMuleClient clientInterface;
public DefaultMuleEventContext(MuleEvent event)
{
this.event = event;
this.session = event.getSession();
this.muleContext = event.getMuleContext();
this.clientInterface = muleContext.getClient();
}
/**
* Returns the message payload for this event
*
* @return the message payload for this event
*/
public MuleMessage getMessage()
{
return event.getMessage();
}
/**
* Reterns the conents of the message as a byte array.
*
* @return the conents of the message as a byte array
* @throws org.mule.api.MuleException if the message cannot be converted into an
* array of bytes
*/
public byte[] getMessageAsBytes() throws MuleException
{
return event.getMessageAsBytes();
}
/**
* Returns the message transformed into its recognised or expected format. The
* transformer used is the one configured on the endpoint through which this
* event was received.
*
* @param dataType The dataType required for the return object. This param
* just provides a convienient way to manage type casting of
* transformed objects
* @return the message transformed into it's recognised or expected format.
* @throws org.mule.api.transformer.TransformerException if a failure occurs or
* if the return type is not the same as the expected type in the
* transformer
* @see org.mule.api.transformer.Transformer
*/
public Object transformMessage(DataType dataType) throws TransformerException
{
return event.transformMessage(dataType);
}
/**
* Returns the message transformed into its recognised or expected format. The
* transformer used is the one configured on the endpoint through which this
* event was received.
*
* @param expectedType The class type required for the return object. This param
* just provides a convienient way to manage type casting of
* transformed objects
* @return the message transformed into it's recognised or expected format.
* @throws org.mule.api.transformer.TransformerException if a failure occurs or
* if the return type is not the same as the expected type in the
* transformer
* @see org.mule.api.transformer.Transformer
*/
public Object transformMessage(Class expectedType) throws TransformerException
{
return event.transformMessage(DataTypeFactory.create(expectedType));
}
/**
* Returns the message transformed into it's recognised or expected format and
* then into an array of bytes. The transformer used is the one configured on the
* endpoint through which this event was received.
*
* @return the message transformed into it's recognised or expected format as an
* array of bytes.
* @throws org.mule.api.transformer.TransformerException if a failure occurs in
* the transformer
* @see org.mule.api.transformer.Transformer
* @deprecated use {@link #transformMessage(org.mule.api.transformer.DataType)} instead
*/
@Deprecated
public byte[] transformMessageToBytes() throws TransformerException
{
return event.transformMessage(DataType.BYTE_ARRAY_DATA_TYPE);
}
/**
* Returns the message contents as a string
*
* @return the message contents as a string
* @throws org.mule.api.MuleException if the message cannot be converted into a
* string
*/
public String getMessageAsString(String encoding) throws MuleException
{
return event.getMessageAsString(encoding);
}
/**
* Returns the message transformed into it's recognised or expected format and
* then into a String. The transformer used is the one configured on the endpoint
* through which this event was received. This method will use the default
* encoding on the event
*
* @return the message transformed into it's recognised or expected format as a
* Strings.
* @throws org.mule.api.transformer.TransformerException if a failure occurs in
* the transformer
* @see org.mule.api.transformer.Transformer
*/
public String transformMessageToString() throws TransformerException
{
return event.transformMessageToString();
}
/**
* Returns the message contents as a string This method will use the default
* encoding on the event
*
* @return the message contents as a string
* @throws org.mule.api.MuleException if the message cannot be converted into a
* string
*/
public String getMessageAsString() throws MuleException
{
return event.getMessageAsString();
}
/**
* Returns the current transaction (if any) for the session
*
* @return the current transaction for the session or null if there is no
* transaction in progress
*/
public Transaction getCurrentTransaction()
{
return TransactionCoordination.getInstance().getTransaction();
}
public void markTransactionForRollback() throws TransactionException
{
if (getCurrentTransaction() != null)
{
getCurrentTransaction().setRollbackOnly();
}
}
/**
* This will send an event via the configured outbound router on the service
*
* @param message the message to send
* @return the result of the send if any
* @throws org.mule.api.MuleException if there is no outbound endpoint configured
* on the service or the events fails during dispatch
*/
public MuleMessage sendEvent(Object message) throws MuleException
{
return sendEvent(new DefaultMuleMessage(message, event.getMessage(), event.getMuleContext()));
}
/**
* Depending on the session state this methods either Passes an event
* synchronously to the next available Mule component in the pool or via the
* endpoint configured for the event
*
* @param message the event message payload to send
* @param endpoint The endpoint to disptch the event through.
* @return the return Message from the call or null if there was no result
* @throws org.mule.api.MuleException if the event fails to be processed by the
* service or the transport for the endpoint
*/
public MuleMessage sendEvent(MuleMessage message, OutboundEndpoint endpoint) throws MuleException
{
return clientInterface.process(endpoint, message);
}
/**
* Depending on the session state this methods either Passes an event
* synchronously to the next available Mule component in the pool or via the
* endpoint configured for the event
*
* @param message the message payload to send
* @return the return Message from the call or null if there was no result
* @throws org.mule.api.MuleException if the event fails to be processed by the
* service or the transport for the endpoint
*/
public MuleMessage sendEvent(MuleMessage message) throws MuleException
{
if (event.getEndpoint() instanceof OutboundEndpoint)
{
return clientInterface.process((OutboundEndpoint) event.getEndpoint(), message);
}
else if (session.getFlowConstruct() instanceof Service)
{
Service service = (Service) session.getFlowConstruct();
DefaultMuleEvent eventToSend = new DefaultMuleEvent(message, event.getEndpoint(), session);
MuleEvent event = service.sendEvent(eventToSend);
return event == null ? null : event.getMessage();
}
else
{
throw new MessagingException(
CoreMessages.createStaticMessage("Current event has 'inbound' endpoint and FlowConstuct is not a 'Service', MuleEventContext cannot this message"),
event);
}
}
/**
* Depending on the session state this methods either Passes an event
* synchronously to the next available Mule component in the pool or via the
* endpointUri configured for the event
*
* @param message the event message payload to send
* @param endpointUri The endpointUri to disptch the event through
* @return the return Message from the call or null if there was no result
* @throws org.mule.api.MuleException if the event fails to be processed by the
* service or the transport for the endpointUri
*/
public MuleMessage sendEvent(MuleMessage message, EndpointURI endpointUri) throws MuleException
{
EndpointBuilder builder = null;
if (endpointUri.getEndpointName() != null)
{
builder = muleContext.getRegistry().lookupEndpointBuilder(endpointUri.getEndpointName());
}
if (builder == null)
{
builder = new EndpointURIEndpointBuilder(new URIBuilder(endpointUri));
}
builder.setExchangePattern(MessageExchangePattern.REQUEST_RESPONSE);
OutboundEndpoint endpoint = getMuleContext().getRegistry()
.lookupEndpointFactory()
.getOutboundEndpoint(builder);
return clientInterface.process(endpoint, message);
}
/**
* sends an event request via the configured outbound router for this service.
* This method return immediately, but the result of the event invocation
* available from the returned a Future result that can be accessed later by the
* the returned FutureMessageResult. the Future messageResult can be queried at
* any time to check that the invocation has completed. A timeout is associated
* with the invocation, which is the maximum time in milli-seconds that the
* invocation should take to complete
*
* @param message the object that is the payload of the event
* @param timeout how long to block in milliseconds waiting for a result
* @return the result message if any of the invocation
* @throws org.mule.api.MuleException if the dispatch fails or the components or
* transfromers cannot be found
* @see org.mule.api.FutureMessageResult
*/
public FutureMessageResult sendEventAsync(final Object message, final int timeout) throws MuleException
{
Callable callable = new Callable()
{
public Object call() throws Exception
{
MuleMessage muleMessage = new DefaultMuleMessage(message, event.getMessage(),
event.getMuleContext());
muleMessage.setOutboundProperty(MuleProperties.MULE_EVENT_TIMEOUT_PROPERTY, timeout);
return sendEvent(muleMessage);
}
};
FutureMessageResult result = new FutureMessageResult(callable, event.getMuleContext());
result.execute();
return result;
}
/**
* sends an event request via the configured outbound router for this service.
* This method return immediately, but the result of the event invocation
* available from the returned a Future result that can be accessed later by the
* the returned FutureMessageResult. the Future messageResult can be queried at
* any time to check that the invocation has completed. A timeout is associated
* with the invocation, which is the maximum time in milli-seconds that the
* invocation should take to complete
*
* @param message the MuleMessage of the event
* @param timeout how long to block in milliseconds waiting for a result
* @return the result message if any of the invocation
* @throws org.mule.api.MuleException if the dispatch fails or the components or
* transfromers cannot be found
* @see org.mule.api.FutureMessageResult
*/
public FutureMessageResult sendEventAsync(final MuleMessage message, final int timeout)
throws MuleException
{
Callable callable = new Callable()
{
public Object call() throws Exception
{
message.setOutboundProperty(MuleProperties.MULE_EVENT_TIMEOUT_PROPERTY, timeout);
return sendEvent(message);
}
};
FutureMessageResult result = new FutureMessageResult(callable, event.getMuleContext());
result.execute();
return result;
}
/**
* sends an event request via the configured outbound router for this service.
* This method return immediately, but the result of the event invocation
* available from the returned a Future result that can be accessed later by the
* the returned FutureMessageResult. the Future messageResult can be queried at
* any time to check that the invocation has completed. A timeout is associated
* with the invocation, which is the maximum time in milli-seconds that the
* invocation should take to complete
*
* @param message the MuleMessage of the event
* @param endpointUri the endpointUri to dispatch to
* @param timeout how long to block in milliseconds waiting for a result
* @return the result message if any of the invocation
* @throws org.mule.api.MuleException if the dispatch fails or the components or
* transfromers cannot be found
* @see org.mule.api.FutureMessageResult
*/
public FutureMessageResult sendEventAsync(final MuleMessage message,
final EndpointURI endpointUri,
final int timeout) throws MuleException
{
Callable callable = new Callable()
{
public Object call() throws Exception
{
message.setOutboundProperty(MuleProperties.MULE_EVENT_TIMEOUT_PROPERTY, timeout);
return sendEvent(message, endpointUri);
}
};
FutureMessageResult result = new FutureMessageResult(callable, event.getMuleContext());
result.execute();
return result;
}
/**
* sends an event request via the configured outbound router for this service.
* This method return immediately, but the result of the event invocation
* available from the returned a Future result that can be accessed later by the
* the returned FutureMessageResult. the Future messageResult can be queried at
* any time to check that the invocation has completed. A timeout is associated
* with the invocation, which is the maximum time in milli-seconds that the
* invocation should take to complete
*
* @param message the MuleMessage of the event
* @param endpointName The endpoint name to disptch the event through. This will
* be looked up first on the service configuration and then on the
* mule manager configuration
* @param timeout how long to block in milliseconds waiting for a result
* @return the result message if any of the invocation
* @throws org.mule.api.MuleException if the dispatch fails or the components or
* transfromers cannot be found
* @see org.mule.api.FutureMessageResult
*/
public FutureMessageResult sendEventAsync(final MuleMessage message,
final String endpointName,
final int timeout) throws MuleException
{
Callable callable = new Callable()
{
public Object call() throws Exception
{
message.setOutboundProperty(MuleProperties.MULE_EVENT_TIMEOUT_PROPERTY, timeout);
return sendEvent(message, endpointName);
}
};
FutureMessageResult result = new FutureMessageResult(callable, event.getMuleContext());
result.execute();
return result;
}
/**
* Depending on the session state this methods either Passes an event
* synchronously to the next available Mule component in the pool or via the
* endpoint configured for the event
*
* @param message the event message payload to send
* @param endpointName The endpoint name to disptch the event through. This will
* be looked up first on the service configuration and then on the
* mule manager configuration
* @return the return Message from the call or null if there was no result
* @throws org.mule.api.MuleException if the event fails to be processed by the
* service or the transport for the endpoint
*/
public MuleMessage sendEvent(MuleMessage message, String endpointName) throws MuleException
{
return clientInterface.send(endpointName, message);
}
/**
* This will dispatch an event asynchronously via the configured outbound
* endpoint on the service for this session
*
* @param message payload to dispatch
* @throws org.mule.api.MuleException if there is no outbound endpoint configured
* on the service or the events fails during dispatch
*/
public void dispatchEvent(Object message) throws MuleException
{
dispatchEvent(new DefaultMuleMessage(message, muleContext));
}
/**
* This will dispatch an event asynchronously via the configured outbound
* endpoint on the service for this session
*
* @param message the message to send
* @throws org.mule.api.MuleException if there is no outbound endpoint configured
* on the service or the events fails during dispatch
*/
public void dispatchEvent(MuleMessage message) throws MuleException
{
FlowConstruct flowConstruct = session.getFlowConstruct();
if (flowConstruct == null)
{
throw new IllegalStateException(CoreMessages.objectIsNull("flowConstruct").getMessage());
}
else if (!(flowConstruct instanceof Service))
{
throw new UnsupportedOperationException(
"EventContext.dispatchEvent is only supported when flow constuct is a Service");
}
else
{
MessageProcessor processor = ((Service) flowConstruct).getOutboundMessageProcessor();
if (processor == null)
{
throw new EndpointNotFoundException(
CoreMessages.noOutboundRouterSetOn(flowConstruct.getName()));
}
processor.process(new DefaultMuleEvent(message, RequestContext.getEvent()));
}
}
/**
* Depending on the session state this methods either Passes an event
* asynchronously to the next available Mule component in the pool or via the
* endpointUri configured for the event
*
* @param message the event message payload to send
* @param endpointUri the endpointUri to dispatc the event to first on the
* service configuration and then on the mule manager configuration
* @throws org.mule.api.MuleException if the event fails to be processed by the
* service or the transport for the endpointUri
*/
public void dispatchEvent(MuleMessage message, EndpointURI endpointUri) throws MuleException
{
EndpointBuilder builder = null;
if (endpointUri.getEndpointName() != null)
{
builder = muleContext.getRegistry().lookupEndpointBuilder(endpointUri.getEndpointName());
}
if (builder == null)
{
builder = new EndpointURIEndpointBuilder(new URIBuilder(endpointUri));
}
builder.setExchangePattern(MessageExchangePattern.ONE_WAY);
OutboundEndpoint endpoint = getMuleContext().getRegistry()
.lookupEndpointFactory()
.getOutboundEndpoint(builder);
clientInterface.process(endpoint, message); }
/**
* Depending on the session state this methods either Passes an event
* asynchronously to the next available Mule component in the pool or via the
* endpoint configured for the event
*
* @param message the event message payload to send
* @param endpointName The endpoint name to disptch the event through. This will
* be looked up first on the service configuration and then on the
* mule manager configuration
* @throws org.mule.api.MuleException if the event fails to be processed by the
* service or the transport for the endpoint
*/
public void dispatchEvent(MuleMessage message, String endpointName) throws MuleException
{
EndpointBuilder builder = muleContext.getRegistry().lookupEndpointBuilder(endpointName);
if (builder == null)
{
builder = new EndpointURIEndpointBuilder(new URIBuilder(endpointName, muleContext));
}
builder.setExchangePattern(MessageExchangePattern.ONE_WAY);
OutboundEndpoint endpoint = getMuleContext().getRegistry()
.lookupEndpointFactory()
.getOutboundEndpoint(builder);
clientInterface.process(endpoint, message);
}
/**
* Depending on the session state this methods either Passes an event
* asynchronously to the next available Mule component in the pool or via the
* endpoint configured for the event
*
* @param message the event message payload to send
* @param endpoint The endpoint name to disptch the event through.
* @throws org.mule.api.MuleException if the event fails to be processed by the
* service or the transport for the endpoint
*/
public void dispatchEvent(MuleMessage message, OutboundEndpoint endpoint) throws MuleException
{
clientInterface.process(endpoint, message);
}
/**
* Requests a synchronous receive of an event on the service
*
* @param endpoint the endpoint identifing the endpointUri on ewhich the event
* will be received
* @param timeout time in milliseconds before the request timesout
* @return The requested event or null if the request times out
* @throws org.mule.api.MuleException if the request operation fails
*/
public MuleMessage requestEvent(InboundEndpoint endpoint, long timeout) throws MuleException
{
return clientInterface.request(endpoint, timeout);
}
/**
* Requests a synchronous receive of an event on the service
*
* @param endpointName the endpoint identifing the endpointUri on ewhich the
* event will be received
* @param timeout time in milliseconds before the request timesout
* @return The requested event or null if the request times out
* @throws org.mule.api.MuleException if the request operation fails
*/
public MuleMessage requestEvent(String endpointName, long timeout) throws MuleException
{
return clientInterface.request(endpointName, timeout);
}
/**
* Requests a synchronous receive of an event on the service
*
* @param endpointUri the endpointUri on which the event will be received
* @param timeout time in milliseconds before the request timesout
* @return The requested event or null if the request times out
* @throws org.mule.api.MuleException if the request operation fails
*/
public MuleMessage requestEvent(EndpointURI endpointUri, long timeout) throws MuleException
{
InboundEndpoint endpoint = getMuleContext().getEndpointFactory().getInboundEndpoint(
endpointUri);
return requestEvent(endpoint, timeout);
}
/**
* @return the service descriptor of the service that received this event
*/
public FlowConstruct getFlowConstruct()
{
return event.getFlowConstruct();
}
/**
* Determines whether the default processing for this event will be executed. By
* default, the Mule server will route events according to a components
* configuration. The user can override this behaviour by obtaining a reference
* to the MuleEvent context, either by implementing
* org.mule.api.lifecycle.Callable or calling
* RequestContext.getEventContext to obtain the MuleEventContext for
* the current thread. The user can programmatically control how events are
* dispatched.
*
* @return Returns true is the user has set stopFurtherProcessing.
* @see org.mule.api.MuleEventContext
* @see org.mule.api.lifecycle.Callable
*/
public boolean isStopFurtherProcessing()
{
return RequestContext.getEvent().isStopFurtherProcessing();
}
/**
* Determines whether the default processing for this event will be executed. By
* default, the Mule server will route events according to a components
* configuration. The user can override this behaviour by obtaining a reference
* to the MuleEvent context, either by implementing
* org.mule.api.lifecycle.Callable or calling
* RequestContext.getEventContext to obtain the MuleEventContext for
* the current thread. The user can programmatically control how events are
* dispached.
*
* @param stopFurtherProcessing the value to set.
*/
public void setStopFurtherProcessing(boolean stopFurtherProcessing)
{
event.setStopFurtherProcessing(stopFurtherProcessing);
}
/**
* An outputstream the can optionally be used write response data to an incoming
* message.
*
* @return an output stream if one has been made available by the message
* receiver that received the message
*/
public OutputStream getOutputStream()
{
return event.getOutputStream();
}
public EndpointURI getEndpointURI()
{
return event.getEndpoint().getEndpointURI();
}
public MessageExchangePattern getExchangePattern()
{
return event.getEndpoint().getExchangePattern();
}
/**
* Returns the transaction for the current event or null if there is no
* transaction in progresss
*
* @return the transaction for the current event or null if there is no
* transaction in progresss
*/
public Transaction getTransaction()
{
return TransactionCoordination.getInstance().getTransaction();
}
/**
* Get the timeout value associated with the event
*
* @return the timeout for the event
*/
public int getTimeout()
{
return event.getTimeout();
}
/**
* Gets the encoding for the current message. For potocols that send encoding
* Information with the message, this method should be overriden to expose the
* transport encoding, otherwise the default encoding in the Mule configuration
* will be used
*
* @return the encoding for this message. This method must never return null
*/
public String getEncoding()
{
return event.getEncoding();
}
public MuleSession getSession()
{
return event.getSession();
}
@Override
public String toString()
{
return event.toString();
}
public MuleContext getMuleContext()
{
return event.getMuleContext();
}
}
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