CommandExecutor.java
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上传日期:2018-01-08
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- /**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements. See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership. The ASF licenses this file
- * to you 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.apache.hadoop.cli.util;
- import java.io.ByteArrayOutputStream;
- import java.io.File;
- import java.io.PrintStream;
- import java.util.StringTokenizer;
- import org.apache.hadoop.cli.TestCLI;
- import org.apache.hadoop.cli.util.CLITestData.TestCmd;
- import org.apache.hadoop.cli.util.CLITestData.TestCmd.CommandType;
- import org.apache.hadoop.fs.FsShell;
- import org.apache.hadoop.hdfs.tools.DFSAdmin;
- import org.apache.hadoop.mapred.tools.MRAdmin;
- import org.apache.hadoop.util.ToolRunner;
- /**
- *
- * This class executed commands and captures the output
- */
- public class CommandExecutor {
- private static String commandOutput = null;
- private static int exitCode = 0;
- private static Exception lastException = null;
- private static String cmdExecuted = null;
-
- private static String[] getCommandAsArgs(final String cmd, final String masterKey,
- final String master) {
- StringTokenizer tokenizer = new StringTokenizer(cmd, " ");
- String[] args = new String[tokenizer.countTokens()];
-
- int i = 0;
- while (tokenizer.hasMoreTokens()) {
- args[i] = tokenizer.nextToken();
- args[i] = args[i].replaceAll(masterKey, master);
- args[i] = args[i].replaceAll("CLITEST_DATA",
- new File(TestCLI.TEST_CACHE_DATA_DIR).
- toURI().toString().replace(' ', '+'));
- args[i] = args[i].replaceAll("USERNAME", System.getProperty("user.name"));
- i++;
- }
-
- return args;
- }
-
- public static int executeCommand(final TestCmd cmd,
- final String namenode, final String jobtracker)
- throws Exception {
- switch(cmd.getType()) {
- case DFSADMIN:
- return CommandExecutor.executeDFSAdminCommand(cmd.getCmd(), namenode);
- case MRADMIN:
- return CommandExecutor.executeMRAdminCommand(cmd.getCmd(), jobtracker);
- case FS:
- return CommandExecutor.executeFSCommand(cmd.getCmd(), namenode);
- default:
- throw new Exception("Unknow type of Test command:"+ cmd.getType());
- }
- }
-
- public static int executeDFSAdminCommand(final String cmd, final String namenode) {
- exitCode = 0;
-
- ByteArrayOutputStream bao = new ByteArrayOutputStream();
- PrintStream origOut = System.out;
- PrintStream origErr = System.err;
-
- System.setOut(new PrintStream(bao));
- System.setErr(new PrintStream(bao));
-
- DFSAdmin shell = new DFSAdmin();
- String[] args = getCommandAsArgs(cmd, "NAMENODE", namenode);
- cmdExecuted = cmd;
-
- try {
- ToolRunner.run(shell, args);
- } catch (Exception e) {
- e.printStackTrace();
- lastException = e;
- exitCode = -1;
- } finally {
- System.setOut(origOut);
- System.setErr(origErr);
- }
-
- commandOutput = bao.toString();
-
- return exitCode;
- }
-
- public static int executeMRAdminCommand(final String cmd,
- final String jobtracker) {
- exitCode = 0;
-
- ByteArrayOutputStream bao = new ByteArrayOutputStream();
- PrintStream origOut = System.out;
- PrintStream origErr = System.err;
-
- System.setOut(new PrintStream(bao));
- System.setErr(new PrintStream(bao));
-
- MRAdmin mradmin = new MRAdmin();
- String[] args = getCommandAsArgs(cmd, "JOBTRACKER", jobtracker);
- cmdExecuted = cmd;
-
- try {
- ToolRunner.run(mradmin, args);
- } catch (Exception e) {
- e.printStackTrace();
- lastException = e;
- exitCode = -1;
- } finally {
- System.setOut(origOut);
- System.setErr(origErr);
- }
-
- commandOutput = bao.toString();
-
- return exitCode;
- }
- public static int executeFSCommand(final String cmd, final String namenode) {
- exitCode = 0;
-
- ByteArrayOutputStream bao = new ByteArrayOutputStream();
- PrintStream origOut = System.out;
- PrintStream origErr = System.err;
-
- System.setOut(new PrintStream(bao));
- System.setErr(new PrintStream(bao));
-
- FsShell shell = new FsShell();
- String[] args = getCommandAsArgs(cmd, "NAMENODE", namenode);
- cmdExecuted = cmd;
-
- try {
- ToolRunner.run(shell, args);
- } catch (Exception e) {
- e.printStackTrace();
- lastException = e;
- exitCode = -1;
- } finally {
- System.setOut(origOut);
- System.setErr(origErr);
- }
-
- commandOutput = bao.toString();
-
- return exitCode;
- }
-
- public static String getLastCommandOutput() {
- return commandOutput;
- }
- public static int getLastExitCode() {
- return exitCode;
- }
- public static Exception getLastException() {
- return lastException;
- }
- public static String getLastCommand() {
- return cmdExecuted;
- }
- }