org.jboss.remotingjmx.protocol.v2.ClientRequestManager Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2023 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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.
*/
package org.jboss.remotingjmx.protocol.v2;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* Manager responsible for maintaining the correlation IDs and pending requests.
*
* @author Darran Lofthouse
*/
class ClientRequestManager {
private int nextCorrelationId = 1;
/**
* The in-progress requests awaiting a response.
*/
private final Map requests = new HashMap();
/**
* Get the next correlation ID, returning to the beginning once all integers have been used.
*
* THIS METHOD IS NOT TO BE USED DIRECTLY WHERE A CORRELATION ID NEEDS TO BE RESERVED.
*
* @return The next correlationId.
*/
private synchronized int getNextCorrelationId() {
int next = nextCorrelationId++;
// After the maximum integer start back at the beginning.
if (next < 0) {
nextCorrelationId = 2;
next = 1;
}
return next;
}
/**
* Reserves a correlation ID by taking the next value and ensuring it is stored in the Map.
*
* @return the next reserved correlation ID
*/
synchronized int reserveNextCorrelationId(VersionedIoFuture future) {
Integer next = getNextCorrelationId();
// Not likely but possible to use all IDs and start back at beginning while
// old request still in progress.
while (requests.containsKey(next)) {
next = getNextCorrelationId();
}
requests.put(next, future);
return next;
}
synchronized VersionedIoFuture getFuture(int correlationId) {
// TODO - How to check this?
return requests.get(correlationId);
}
synchronized void releaseCorrelationId(int correlationId) {
// TODO - Will maybe move to not removing by default and timeout failed requests.
requests.remove(correlationId);
}
synchronized void cancelAllRequests(final IOException io) {
for (VersionedIoFuture current : requests.values()) {
current.setException(io);
}
requests.clear();
}
}