Java tutorial
/******************************************************************************* * Copyright (c) 2012 GigaSpaces Technologies Ltd. All rights reserved * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ package org.cloudifysource.dsl.context.utils; import com.gigaspaces.internal.sigar.SigarHolder; import org.apache.commons.exec.*; import org.apache.commons.lang.StringUtils; import org.cloudifysource.dsl.context.blockstorage.LocalStorageOperationException; import org.cloudifysource.dsl.context.blockstorage.StorageFacade; import org.hyperic.sigar.FileSystem; import org.hyperic.sigar.Sigar; import org.hyperic.sigar.SigarException; import java.io.File; import java.util.ArrayList; import java.util.List; import java.util.concurrent.TimeoutException; import java.util.logging.Logger; /** * * @author elip * */ public final class VolumeUtils { // prevent instantiation. private VolumeUtils() { } private static final Logger logger = Logger.getLogger(VolumeUtils.class.getName()); private static final String USER_NAME = System.getProperty("user.name"); private static final long MOUNT_TIMEOUT = 30 * 1000; private static final long FORMAT_TIMEOUT = 5 * 60 * 1000; private static final long UNMOUNT_TIMEOUT = 15 * 1000; private static final long TEN_SECONDS = 10 * 1000; /** * @see {@link StorageFacade#unmount(String, long)}. * @param device . * @param timeoutInMillis . * @throws LocalStorageOperationException . * @throws TimeoutException . */ public static void unmount(final String device, final long timeoutInMillis) throws LocalStorageOperationException, TimeoutException { executeCommandLine("sudo umount -d -v -l -f " + device, timeoutInMillis); } /** * @see {@link StorageFacade#unmount(String)} * @param device . * @throws LocalStorageOperationException . * @throws TimeoutException . */ public static void unmount(final String device) throws LocalStorageOperationException, TimeoutException { unmount(device, UNMOUNT_TIMEOUT); } /** * @see {@link StorageFacade#mount(String, String, long)} * @param device . * @param path . * @param timeoutInMillis . * @throws LocalStorageOperationException . * @throws TimeoutException . */ public static void mount(final String device, final String path, final long timeoutInMillis) throws LocalStorageOperationException, TimeoutException { File devicePath = new File(path); executeCommandLine("sudo mkdir " + path, TEN_SECONDS); executeCommandLine("sudo mount " + device + " " + path, timeoutInMillis); executeCommandLine("sudo chown " + USER_NAME + " " + devicePath.getAbsolutePath(), TEN_SECONDS); } /** * @see {@link StorageFacade#mount(String, String)} * @param device . * @param path . * @throws LocalStorageOperationException . * @throws TimeoutException . */ public static void mount(final String device, final String path) throws LocalStorageOperationException, TimeoutException { mount(device, path, MOUNT_TIMEOUT); } /** * @see {@link StorageFacade#format(String, String, long)} * @param device . * @param fileSystem . * @param timeoutInMillis . * @throws LocalStorageOperationException . * @throws TimeoutException . */ public static void format(final String device, final String fileSystem, final long timeoutInMillis) throws LocalStorageOperationException, TimeoutException { checkFileSystemSupported(fileSystem); executeCommandLine("sudo mkfs -F -t " + fileSystem + " " + device, timeoutInMillis); } /** * @see {@link StorageFacade#format(String, String)}. * @param device . * @param fileSystem . * @throws LocalStorageOperationException . * @throws TimeoutException . */ public static void format(final String device, final String fileSystem) throws LocalStorageOperationException, TimeoutException { format(device, fileSystem, FORMAT_TIMEOUT); } private static void checkFileSystemSupported(final String fileSystem) throws LocalStorageOperationException { FileSystem[] fileSystemList; try { Sigar sigar = SigarHolder.getSigar(); fileSystemList = sigar.getFileSystemList(); } catch (final SigarException e) { throw new LocalStorageOperationException(e); } List<String> supportedFileSystems = new ArrayList<String>(); for (FileSystem fs : fileSystemList) { if (fileSystem.equalsIgnoreCase(fs.getSysTypeName())) { return; } else { supportedFileSystems.add(fs.getSysTypeName()); } } throw new LocalStorageOperationException("File system type " + fileSystem + " is not supported for the current operating system. Supported File Systems are : " + StringUtils.join(supportedFileSystems, ",")); } private static void executeCommandLine(final String commandLine, final long timeout) throws LocalStorageOperationException, TimeoutException { Executor executor = new DefaultExecutor(); executor.setExitValue(0); ExecuteWatchdog watchdog = new ExecuteWatchdog(timeout); executor.setWatchdog(watchdog); ProcessOutputStream outAndErr = new ProcessOutputStream(); try { PumpStreamHandler streamHandler = new PumpStreamHandler(outAndErr); executor.setStreamHandler(streamHandler); logger.info("Executing commandLine : '" + commandLine + "'"); executor.execute(CommandLine.parse(commandLine)); logger.info("Execution completed successfully. Process output was : " + outAndErr.getOutput()); } catch (final Exception e) { if (watchdog.killedProcess()) { throw new TimeoutException("Timed out while executing commandLine : '" + commandLine + "'"); } throw new LocalStorageOperationException("Failed executing commandLine : '" + commandLine + ". Process output was : " + outAndErr.getOutput(), e); } } /** * Logs process output to the logger. * @author elip * */ private static class ProcessOutputStream extends LogOutputStream { private List<String> output = new java.util.LinkedList<String>(); private String getOutput() { return StringUtils.join(output, "\n"); } @Override protected void processLine(final String line, final int level) { output.add(line); logger.info(line); } } }