Mercurial > hg > release > thermostat-0.5
view vm-heap-analysis/command/src/main/java/com/redhat/thermostat/vm/heap/analysis/command/internal/SaveHeapDumpToFileCommand.java @ 937:37c9527f664f
Refactor command class hierarchy
Reviewed-by: omajid
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-January/005343.html
author | Jon VanAlten <jon.vanalten@redhat.com> |
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date | Tue, 29 Jan 2013 00:28:43 -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.vm.heap.analysis.command.internal; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import com.redhat.thermostat.common.cli.Arguments; import com.redhat.thermostat.common.cli.CommandContext; import com.redhat.thermostat.common.cli.CommandException; import com.redhat.thermostat.common.cli.AbstractCommand; import com.redhat.thermostat.common.locale.Translate; import com.redhat.thermostat.common.utils.OSGIUtils; import com.redhat.thermostat.common.utils.StreamUtils; import com.redhat.thermostat.storage.model.HeapInfo; import com.redhat.thermostat.vm.heap.analysis.command.locale.LocaleResources; import com.redhat.thermostat.vm.heap.analysis.common.HeapDAO; public class SaveHeapDumpToFileCommand extends AbstractCommand { private static final Translate<LocaleResources> translator = LocaleResources.createLocalizer(); private static final String NAME = "save-heap-dump-to-file"; private static final String HEAP_ID_ARGUMENT = "heapId"; private static final String FILE_NAME_ARGUMENT = "file"; private final FileStreamCreator creator; private final OSGIUtils serviceProvider; public SaveHeapDumpToFileCommand() { this(OSGIUtils.getInstance(), new FileStreamCreator()); } SaveHeapDumpToFileCommand(OSGIUtils serviceProvider, FileStreamCreator creator) { this.serviceProvider = serviceProvider; this.creator = creator; } @Override public String getName() { return NAME; } @Override public void run(CommandContext ctx) throws CommandException { HeapDAO heapDAO = serviceProvider.getServiceAllowNull(HeapDAO.class); try { run(ctx, heapDAO); } finally { serviceProvider.ungetService(HeapDAO.class, heapDAO); heapDAO = null; } } private void run(CommandContext ctx, HeapDAO heapDAO) throws CommandException { Arguments args = ctx.getArguments(); String heapId = args.getArgument(HEAP_ID_ARGUMENT); if (heapId == null) { throw new CommandException(translator.localize(LocaleResources.HEAP_ID_REQUIRED)); } String filename = args.getArgument(FILE_NAME_ARGUMENT); if (filename == null) { throw new CommandException(translator.localize(LocaleResources.FILE_REQUIRED)); } HeapInfo heapInfo = heapDAO.getHeapInfo(heapId); try (InputStream heapStream = heapDAO.getHeapDumpData(heapInfo)) { if (heapStream != null) { try { saveHeapDump(heapStream, filename); ctx.getConsole().getOutput().println(translator.localize(LocaleResources.COMMAND_SAVE_HEAP_DUMP_SAVED_TO_FILE, filename)); } catch (IOException e) { ctx.getConsole().getOutput().println(translator.localize(LocaleResources.COMMAND_SAVE_HEAP_DUMP_ERROR_SAVING, e.getMessage())); } } else { ctx.getConsole().getOutput().println(translator.localize(LocaleResources.HEAP_ID_NOT_FOUND, heapId)); } } catch (IOException e) { throw new CommandException(translator.localize(LocaleResources.COMMAND_SAVE_HEAP_DUMP_ERROR_CLOSING_STREAM, e.getMessage())); } } private void saveHeapDump(InputStream heapStream, String filename) throws FileNotFoundException, IOException { try (BufferedInputStream bis = new BufferedInputStream(heapStream); BufferedOutputStream bout = new BufferedOutputStream(creator.createOutputStream(filename))) { StreamUtils.copyStream(bis, bout); } } static class FileStreamCreator { public OutputStream createOutputStream(String filename) throws FileNotFoundException { return new FileOutputStream(filename); } } }