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OnMessageRunnerPool.java
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OnMessageRunnerPool.java
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/*
* Copyright (c) 2000, 2020 Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2020, 2021 Contributors to Eclipse Foundation
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.messaging.jms.ra;
import jakarta.jms.*;
import java.util.Vector;
import java.util.ArrayList;
import java.util.logging.Logger;
import jakarta.resource.spi.endpoint.MessageEndpointFactory;
import com.sun.messaging.jmq.jmsservice.ConsumerClosedNoDeliveryException;
/**
* Holds a pool of OnMessageRunner objects.
*/
public class OnMessageRunnerPool {
/** The maximum number of OnMessageRunner objects allocated */
private int max;
/** The minimum number of OnMessageRunner objects allocated */
private int min;
/** The slack - number of OnMessageRunner objects that can and have not been created */
private int slackCount;
/** The MessageEndpointFactory for this onMessageRunnerPool */
private MessageEndpointFactory epFactory;
/** The EndpointConsumer for this onMessageRunnerPool */
private EndpointConsumer epConsumer;
/** The ActivationSpec for this MessageListener instance */
private ActivationSpec spec = null;
private boolean useDirect = false;
private ArrayList<OnMessageRunner> onMessageRunners;
/** The list of available OnMessageRunner objects */
private Vector<OnMessageRunner> available;
private volatile boolean deactivating;
/* Loggers */
private static final String _className = "com.sun.messaging.jms.ra.OnMessageRunnerPool";
protected static final String _lgrNameInboundMessage = "javax.resourceadapter.mqjmsra.inbound.message";
protected static final Logger _loggerIM = Logger.getLogger(_lgrNameInboundMessage);
protected static final String _lgrMIDPrefix = "MQJMSRA_RP";
protected static final String _lgrMID_EET = _lgrMIDPrefix + "1001: ";
protected static final String _lgrMID_INF = _lgrMIDPrefix + "1101: ";
protected static final String _lgrMID_WRN = _lgrMIDPrefix + "2001: ";
protected static final String _lgrMID_ERR = _lgrMIDPrefix + "3001: ";
protected static final String _lgrMID_EXC = _lgrMIDPrefix + "4001: ";
/** Constructs an OnMessagePoolRunner */
public OnMessageRunnerPool(MessageEndpointFactory epFactory, EndpointConsumer epConsumer, ActivationSpec spec, boolean useDirect) {
Object params[] = new Object[4];
params[0] = epFactory;
params[1] = epConsumer;
params[2] = spec;
params[3] = Boolean.valueOf(useDirect);
_loggerIM.entering(_className, "constructor()", params);
int minimum, maximum;
this.epFactory = epFactory;
this.epConsumer = epConsumer;
this.spec = spec;
this.useDirect = useDirect;
minimum = spec.getEndpointPoolSteadySize();
maximum = spec.getEndpointPoolMaxSize();
if (maximum < 1) {
this.max = 10;
} else {
this.max = maximum;
}
if (minimum < 1 || minimum > max) {
this.min = 1;
} else {
this.min = minimum;
}
available = new Vector<>(min);
/* list of all onMessageRunner objects created */
onMessageRunners = new ArrayList<>(min);
OnMessageRunner omr;
for (int i = 0; i < min; i++) {
omr = new OnMessageRunner(i, this, epFactory, epConsumer, spec, useDirect);
onMessageRunners.add(omr);
available.addElement(omr);
}
slackCount = max - min;
}
/**
* Get an OnMessageRunner from the pool
*
*
*/
public synchronized OnMessageRunner getOnMessageRunner() throws JMSException {
OnMessageRunner omr;
// System.out.println("MQRA:OMRP:getOMR()");
if (available.isEmpty()) {
if (deactivating) {
throw new ConsumerClosedNoDeliveryException("MQRA:OMRP:getOMR:OnMessageRunnerPool is in deactivating");
}
// System.out.println("MQRA:OMRP:getOMR:size=0");
if (slackCount > 0) {
// System.out.println("MQRA:OMRP:getOMR:adding from slack");
omr = new OnMessageRunner(onMessageRunners.size(), this, epFactory, epConsumer, spec, useDirect);
onMessageRunners.add(omr);
slackCount--;
// System.out.println("MQRA:OMRP:getOMR:slack-Getting omr Id="+omr.omrId);
return omr;
}
}
while (available.isEmpty()) {
if (deactivating) {
throw new ConsumerClosedNoDeliveryException("MQRA:OMRP:getOMR:OnMessageRunnerPool is in deactivating");
}
try {
// System.out.println("MQRA:OMRP:getOMR:Waiting...");
wait();
} catch (InterruptedException ie) {
// System.out.println("MQRA:OMRP:getOMR:Interrupted while waiting...throwing exception-"+ie.getMessage());
JMSException jmse = new com.sun.messaging.jms.JMSException("MQRA:OMRP:Unable to get OMR from pool:" + ie.getMessage());
jmse.setLinkedException(ie);
throw jmse;
}
}
omr = available.elementAt(available.size() - 1);
// System.out.println("MQRA:OMRP:getOMR:Getting omr at index="+(available.size()-1)+" with omrId="+omr.omrId);
available.removeElementAt(available.size() - 1);
return omr;
}
/**
* Put an OnMessageRunner back to the pool
*
*/
public synchronized void putOnMessageRunner(OnMessageRunner omr) {
// System.out.println("MQRA:OMRP:Putting back omrId="+omr.omrId+" at index="+available.size());
available.addElement(omr);
// XXX:reduction logic - here if needed
notifyAll();
}
public synchronized void removeOnMessageRunner(OnMessageRunner omr) {
int index;
// System.out.println("MQRA:OMRP:removeOMR:Id="+omr.getId());
index = onMessageRunners.indexOf(omr);
if (index != -1) {
// System.out.println("MQRA:OMRP:removeOMR:Id="+omr.getId()+" at index="+index);
onMessageRunners.remove(index);
notifyAll();
if (slackCount < (max - min)) {
slackCount++;
}
}
}
public synchronized void waitForAllOnMessageRunners() throws JMSException {
// System.out.println("MQRA:OMRP:wfaOMRs():allocated="+onMessageRunners.size()+" available="+available.size());
while (available.size() < onMessageRunners.size()) {
try {
// System.out.println("(MQRA:OMRP:wfaOMRs:Waiting...");
wait();
} catch (InterruptedException ie) {
// System.out.println("MQRA:OMRP:wfaOMRs:Interrupted while waiting...throwing exception-"+ie.getMessage());
JMSException jmse = new com.sun.messaging.jms.JMSException("MQRA:OMRP:Didnot finish waiting for OMRs to return:" + ie.getMessage());
jmse.setLinkedException(ie);
throw jmse;
}
}
// System.out.println("MQRA:OMRP:wfaOMRs:DONE:allocated="+onMessageRunners.size()+" available="+available.size());
}
public synchronized void releaseOnMessageRunners() {
this.deactivating = true;
// System.out.println("MQRA:OMRP:releaseOMRs()");
for (int i = 0; i < onMessageRunners.size(); i++) {
onMessageRunners.get(i).releaseEndpoint();
}
onMessageRunners.clear();
available.removeAllElements();
notifyAll();
slackCount = max;
// System.out.println("MQRA:OMRP:releaseOMRs-done");
}
public synchronized void invalidateOnMessageRunners() {
// System.err.println("MQRA:OMRP:invalidateOMRs()");
for (int i = 0; i < onMessageRunners.size(); i++) {
onMessageRunners.get(i).invalidate();
}
releaseOnMessageRunners();
// System.err.println("MQRA:OMRP:invalidateOMRs-done");
}
}