Mercurial > hg > release > thermostat-0.6
view host-memory/agent/src/main/java/com/redhat/thermostat/host/memory/agent/internal/HostMemoryBackend.java @ 989:cf7a445c359b
Refactoring and cleanup of Backend
Reviewed-by: omajid
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-February/005705.html
author | Jon VanAlten <jon.vanalten@redhat.com> |
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date | Fri, 15 Feb 2013 15:16:47 -0500 |
parents | ccac9bcabaa0 |
children |
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/* * Copyright 2012, 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.concurrent.ScheduledExecutorService; import java.util.concurrent.TimeUnit; import com.redhat.thermostat.backend.BaseBackend; import com.redhat.thermostat.common.Version; import com.redhat.thermostat.host.memory.common.MemoryStatDAO; import com.redhat.thermostat.utils.ProcDataSource; public class HostMemoryBackend extends BaseBackend { private static final long PROC_CHECK_INTERVAL = 1000; // TODO make this configurable. private final MemoryStatBuilder memoryStatBuilder; private MemoryStatDAO memoryStats; private ScheduledExecutorService executor; private boolean started; public HostMemoryBackend(ScheduledExecutorService executor, MemoryStatDAO memoryStatDAO, Version version) { super("Host Memory Backend", "Gathers memory statistics about a host", "Red Hat, Inc.", version.getVersionNumber(), true); this.executor = executor; this.memoryStats = memoryStatDAO; ProcDataSource source = new ProcDataSource(); memoryStatBuilder = new MemoryStatBuilder(source); } @Override public boolean activate() { if (!started) { executor.scheduleAtFixedRate(new Runnable() { @Override public void run() { memoryStats.putMemoryStat(memoryStatBuilder.build()); } }, 0, PROC_CHECK_INTERVAL, TimeUnit.MILLISECONDS); started = true; } return true; } @Override public boolean deactivate() { executor.shutdown(); started = false; return true; } @Override public boolean isActive() { return started; } @Override public int getOrderValue() { return ORDER_MEMORY_GROUP; } }