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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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137
activemq-core/src/main/java/org/apache/activemq/transport/ResponseCorrelator.java
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@ -1,125 +1,122 @@
/**
*
* 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();
public class ResponseCorrelator extends TransportFilter{
private static final Log log=LogFactory.getLog(ResponseCorrelator.class);
private final Map requestMap=new HashMap();
private IntSequenceGenerator sequenceGenerator;
private final boolean debug = log.isDebugEnabled();
public ResponseCorrelator(Transport next) {
this(next, new IntSequenceGenerator());
}
public ResponseCorrelator(Transport next, IntSequenceGenerator sequenceGenerator) {
super(next);
this.sequenceGenerator = sequenceGenerator;
private final boolean debug=log.isDebugEnabled();
public ResponseCorrelator(Transport next){
this(next,new IntSequenceGenerator());
}
public void oneway(Object o) throws IOException {
Command command = (Command) o;
public ResponseCorrelator(Transport next,IntSequenceGenerator sequenceGenerator){
super(next);
this.sequenceGenerator=sequenceGenerator;
}
public void oneway(Object o) throws IOException{
Command command=(Command)o;
command.setCommandId(sequenceGenerator.getNextSequenceId());
command.setResponseRequired(false);
next.oneway(command);
}
public FutureResponse asyncRequest(Object o, ResponseCallback responseCallback) throws IOException {
Command command = (Command) o;
public FutureResponse asyncRequest(Object o,ResponseCallback responseCallback) throws IOException{
Command command=(Command)o;
command.setCommandId(sequenceGenerator.getNextSequenceId());
command.setResponseRequired(true);
FutureResponse future = new FutureResponse(responseCallback);
requestMap.put(new Integer(command.getCommandId()), future);
FutureResponse future=new FutureResponse(responseCallback);
synchronized(requestMap){
requestMap.put(new Integer(command.getCommandId()),future);
}
next.oneway(command);
return future;
}
public Object request(Object command) throws IOException {
FutureResponse response = asyncRequest(command, null);
public Object request(Object command) throws IOException{
FutureResponse response=asyncRequest(command,null);
return response.getResult();
}
public Object request(Object command,int timeout) throws IOException {
FutureResponse response = asyncRequest(command, null);
public Object request(Object command,int timeout) throws IOException{
FutureResponse response=asyncRequest(command,null);
return response.getResult(timeout);
}
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()));
if( future!=null ) {
future.set(response);
} else {
if( debug ) log.debug("Received unexpected response for command id: "+response.getCorrelationId());
public void onCommand(Object o){
Command command=(Command)o;
if(command.isResponse()){
Response response=(Response)command;
FutureResponse future=null;
synchronized(requestMap){
future=(FutureResponse)requestMap.remove(new Integer(response.getCorrelationId()));
}
} else {
if(future!=null){
future.set(response);
}else{
if(debug)
log.debug("Received unexpected response for command id: "+response.getCorrelationId());
}
}else{
getTransportListener().onCommand(command);
}
}
/**
* 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) {
public void onException(IOException error){
// Copy and Clear the request Map
ArrayList requests = new ArrayList(requestMap.values());
ArrayList requests=new ArrayList(requestMap.values());
requestMap.clear();
for (Iterator iter = requests.iterator(); iter.hasNext();) {
FutureResponse fr = (FutureResponse) iter.next();
for(Iterator iter=requests.iterator();iter.hasNext();){
FutureResponse fr=(FutureResponse)iter.next();
fr.set(new ExceptionResponse(error));
}
super.onException(error);
}
public IntSequenceGenerator getSequenceGenerator() {
public IntSequenceGenerator getSequenceGenerator(){
return sequenceGenerator;
}
public String toString() {
public String toString(){
return next.toString();
}
}