Mercurial > hg > release > thermostat-0.5
view host-memory/agent/src/main/java/com/redhat/thermostat/host/memory/agent/internal/Activator.java @ 892:4c8a876b9dc0
Create Host Memory agent and common bundles
This commit extracts Host Memory data collection from SystemBackend into
a host-memory-agent bundle. It also moves the MemoryStatDAO from
common-core into a host-memory-common bundle that registers the DAO once
Storage is available. This also removes the DAO from DAOFactory.
Reviewed-by: omajid
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-January/004994.html
author | Elliott Baron <ebaron@redhat.com> |
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date | Mon, 07 Jan 2013 15:46:47 -0500 |
parents | |
children | ccac9bcabaa0 |
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/* * Copyright 2013 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.host.memory.agent.internal; import java.util.Map; import java.util.concurrent.Executors; import java.util.concurrent.ScheduledExecutorService; import org.osgi.framework.BundleActivator; import org.osgi.framework.BundleContext; import org.osgi.framework.ServiceRegistration; import com.redhat.thermostat.backend.Backend; import com.redhat.thermostat.backend.BackendService; import com.redhat.thermostat.common.MultipleServiceTracker; import com.redhat.thermostat.common.MultipleServiceTracker.Action; import com.redhat.thermostat.common.Version; import com.redhat.thermostat.host.memory.common.MemoryStatDAO; public class Activator implements BundleActivator { private ScheduledExecutorService executor; private MultipleServiceTracker tracker; private HostMemoryBackend backend; private ServiceRegistration reg; @Override public void start(final BundleContext context) throws Exception { executor = Executors.newSingleThreadScheduledExecutor(); Class<?>[] deps = new Class<?>[] { BackendService.class, MemoryStatDAO.class }; tracker = new MultipleServiceTracker(context, deps, new Action() { @Override public void dependenciesAvailable(Map<String, Object> services) { MemoryStatDAO memoryStatDao = (MemoryStatDAO) services.get(MemoryStatDAO.class.getName()); Version version = new Version(context.getBundle()); backend = new HostMemoryBackend(executor, memoryStatDao, version); reg = context.registerService(Backend.class.getName(), backend, null); } @Override public void dependenciesUnavailable() { if (backend.isActive()) { backend.deactivate(); } reg.unregister(); } }); tracker.open(); } @Override public void stop(BundleContext context) throws Exception { tracker.close(); } /* * For testing purposes only. */ HostMemoryBackend getBackend() { return backend; } }