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git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@509728 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Robert Davies 2007-02-20 20:05:00 +00:00
parent 76c466ddef
commit 32a4c47204
1 changed files with 67 additions and 70 deletions
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51
activemq-core/src/main/java/org/apache/activemq/transport/ResponseCorrelator.java
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@ -1,49 +1,45 @@
/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE
* file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file
* to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package org.apache.activemq.transport;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.apache.activemq.command.Command;
import org.apache.activemq.command.ExceptionResponse;
import org.apache.activemq.command.Response;
import org.apache.activemq.util.IntSequenceGenerator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.concurrent.ConcurrentHashMap;
/**
* Adds the incrementing sequence number to commands along with performing the corelation of
* responses to requests to create a blocking request-response semantics.
* Adds the incrementing sequence number to commands along with performing the corelation of responses to requests to
* create a blocking request-response semantics.
*
* @version $Revision: 1.4 $
*/
public class ResponseCorrelator extends TransportFilter{
private static final Log log=LogFactory.getLog(ResponseCorrelator.class);
private final ConcurrentHashMap requestMap = new ConcurrentHashMap();
private final Map requestMap=new HashMap();
private IntSequenceGenerator sequenceGenerator;
private final boolean debug=log.isDebugEnabled();
public ResponseCorrelator(Transport next){
this(next,new IntSequenceGenerator());
}
@ -65,7 +61,9 @@ public class ResponseCorrelator extends TransportFilter {
command.setCommandId(sequenceGenerator.getNextSequenceId());
command.setResponseRequired(true);
FutureResponse future=new FutureResponse(responseCallback);
synchronized(requestMap){
requestMap.put(new Integer(command.getCommandId()),future);
}
next.oneway(command);
return future;
}
@ -82,14 +80,17 @@ public class ResponseCorrelator extends TransportFilter {
public void onCommand(Object o){
Command command=(Command)o;
if(command.isResponse()){
Response response=(Response)command;
FutureResponse future = (FutureResponse) requestMap.remove(new Integer(response.getCorrelationId()));
FutureResponse future=null;
synchronized(requestMap){
future=(FutureResponse)requestMap.remove(new Integer(response.getCorrelationId()));
}
if(future!=null){
future.set(response);
}else{
if( debug ) log.debug("Received unexpected response for command id: "+response.getCorrelationId());
if(debug)
log.debug("Received unexpected response for command id: "+response.getCorrelationId());
}
}else{
getTransportListener().onCommand(command);
@ -97,20 +98,17 @@ public class ResponseCorrelator extends TransportFilter {
}
/**
* If an async exception occurs, then assume no responses will arrive for any of
* current requests. Lets let them know of the problem.
* If an async exception occurs, then assume no responses will arrive for any of current requests. Lets let them
* know of the problem.
*/
public void onException(IOException error){
// Copy and Clear the request Map
ArrayList requests=new ArrayList(requestMap.values());
requestMap.clear();
for(Iterator iter=requests.iterator();iter.hasNext();){
FutureResponse fr=(FutureResponse)iter.next();
fr.set(new ExceptionResponse(error));
}
super.onException(error);
}
@ -121,5 +119,4 @@ public class ResponseCorrelator extends TransportFilter {
public String toString(){
return next.toString();
}
}