Mercurial > hg > release > thermostat-1.0
view agent/core/src/main/java/com/redhat/thermostat/utils/management/internal/MXBeanConnectionPoolImpl.java @ 1412:a0592d702416
Update copyright year in release branch.
reviewed-by: neugens
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2014-June/009965.html
PR1821
author | Jon VanAlten <jon.vanalten@redhat.com> |
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date | Tue, 03 Jun 2014 11:55:56 -0600 |
parents | b1f82879e6a9 |
children | adb678c592f5 |
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/* * Copyright 2012-2014 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.utils.management.internal; import java.io.File; import java.io.IOException; import java.rmi.RemoteException; import java.util.HashMap; import java.util.Map; import java.util.logging.Level; import java.util.logging.Logger; import com.redhat.thermostat.agent.RMIRegistry; import com.redhat.thermostat.agent.internal.RMIRegistryImpl; import com.redhat.thermostat.agent.utils.management.MXBeanConnection; import com.redhat.thermostat.agent.utils.management.MXBeanConnectionPool; import com.redhat.thermostat.common.Pair; import com.redhat.thermostat.common.tools.ApplicationException; import com.redhat.thermostat.common.utils.LoggingUtils; public class MXBeanConnectionPoolImpl implements MXBeanConnectionPool { private static final Logger logger = LoggingUtils.getLogger(MXBeanConnectionPoolImpl.class); // pid -> (usageCount, actualObject) private Map<Integer, Pair<Integer, MXBeanConnectionImpl>> pool = new HashMap<>(); private final ConnectorCreator creator; private final RMIRegistryImpl registry; private final File binPath; public MXBeanConnectionPoolImpl(RMIRegistryImpl registry, File binPath) { this(new ConnectorCreator(), registry, binPath); } MXBeanConnectionPoolImpl(ConnectorCreator connectorCreator, RMIRegistryImpl registry, File binPath) { this.creator = connectorCreator; this.registry = registry; this.binPath = binPath; // Start RMI registry try { registry.start(); } catch (RemoteException e) { logger.log(Level.SEVERE, "Unable to start RMI registry", e); } } @Override public synchronized MXBeanConnection acquire(int pid) throws Exception { Pair<Integer, MXBeanConnectionImpl> data = pool.get(pid); if (data == null) { MXBeanConnector connector = null; try { connector = creator.create(registry, pid, binPath); connector.attach(); MXBeanConnectionImpl connection = connector.connect(); data = new Pair<Integer, MXBeanConnectionImpl>(1, connection); } finally { if (connector != null) { connector.close(); } } } else { data = new Pair<>(data.getFirst() + 1, data.getSecond()); } pool.put(pid, data); return data.getSecond(); } @Override public synchronized void release(int pid, MXBeanConnection toRelese) throws Exception { Pair<Integer, MXBeanConnectionImpl> data = pool.get(pid); MXBeanConnectionImpl connection = data.getSecond(); int usageCount = data.getFirst(); usageCount--; if (usageCount == 0) { connection.close(); pool.remove(pid); } else { data = new Pair<>(usageCount, connection); pool.put(pid, data); } } public void shutdown() { try { registry.stop(); } catch (RemoteException e) { logger.log(Level.SEVERE, "Unable to stop RMI registry", e); } } static class ConnectorCreator { public MXBeanConnector create(RMIRegistry registry, int pid, File binPath) throws IOException, ApplicationException { MXBeanConnector connector = new MXBeanConnector(registry, pid, binPath); return connector; } } }