Mercurial > hg > release > thermostat-1.2
view vm-profiler/client-cli/src/main/java/com/redhat/thermostat/vm/profiler/client/cli/internal/AbstractCommand.java @ 1660:c6ae78b6f3ac
[Thermostat 1.2] Update copyright year to 2015
Reviewed-by: omajid
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2015-March/013127.html
PR2273
author | Severin Gehwolf <sgehwolf@redhat.com> |
---|---|
date | Wed, 11 Mar 2015 15:07:27 +0100 |
parents | ffc701452e4b |
children |
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/* * Copyright 2012-2015 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.vm.profiler.client.cli.internal; import java.util.HashMap; import java.util.Map; import java.util.Objects; import java.util.concurrent.BlockingQueue; import java.util.concurrent.LinkedBlockingQueue; import java.util.concurrent.TimeUnit; public abstract class AbstractCommand extends com.redhat.thermostat.common.cli.AbstractCommand { // TODO these changes should probably be promoted to the AbstractCommand public API private Map<Class<?>, BlockingQueue<?>> serviceHolder = new HashMap<>(); private <T> BlockingQueue<T> getHolder(Class<T> serviceClass) { if (!serviceHolder.containsKey(serviceClass)) { serviceHolder.put(serviceClass, new LinkedBlockingQueue<T>(1)); } return (BlockingQueue<T>) serviceHolder.get(serviceClass); } protected <T> void addService(Class<T> serviceClass, T item) { Objects.requireNonNull(item); BlockingQueue<T> holder = getHolder(serviceClass); try { holder.put(item); } catch (InterruptedException e) { throw new AssertionError("Should not happen"); } } protected <T> void removeService(Class<T> serviceClass) { BlockingQueue<T> holder = getHolder(serviceClass); if (holder.peek() != null) { holder.remove(); } } /** @return the service, or <code>null</code> */ protected <T> T getService(Class<T> serviceClass) { BlockingQueue<T> holder = getHolder(serviceClass); try { // a crappy version of peek()-with-timeout T retValue = holder.poll(500, TimeUnit.MILLISECONDS); if (retValue != null) { holder.add(retValue); } return retValue; } catch (InterruptedException e) { return null; } } }