Java tutorial
/* * 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.bigtop.itest.hadoop.hcfs; import java.io.File; import java.util.StringTokenizer; import org.apache.hadoop.fs.FsShell; import org.apache.hadoop.cli.CLITestHelper; import org.apache.hadoop.cli.util.CommandExecutor; import org.apache.hadoop.util.ToolRunner; public class FSCmdExecutor extends CommandExecutor { protected String namenode = null; protected FsShell shell = null; public FSCmdExecutor(String namenode, FsShell shell) { this.namenode = namenode; this.shell = shell; } /** * Execute given hadoop FsShell command. */ protected void execute(final String cmd) throws Exception { String[] args = getCommandAsArgs(cmd, "NAMENODE", this.namenode); ToolRunner.run(shell, args); } /** * Prapare given FsShell command for execution by ToolRunner. * This method also expands all variables used in the command. */ @Override protected 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(); // HCFS fs.default.name Hack (see TestCLI.java) args[i] = args[i].replaceAll("NAMENODETEST_DIR_ABSOLUTE", TestCLI.NAMENODE_TESTDIR_HACK); args[i] = args[i].replaceAll(masterKey, master); args[i] = args[i].replaceAll("CLITEST_DATA", new File(CLITestHelper.TEST_CACHE_DATA_DIR).toURI().toString().replace(' ', '+')); args[i] = args[i].replaceAll("USER_NAME", System.getProperty("user.name")); args[i] = args[i].replaceAll("TEST_DIR_ABSOLUTE", TestCLI.TEST_DIR_ABSOLUTE); args[i] = args[i].replaceAll("HCFS_SCHEME", TestCLI.HCFS_SCHEME); args[i] = args[i].replaceAll("HCFS_DIRSIZE", TestCLI.HCFS_DIRSIZE); args[i] = args[i].replaceAll("HCFS_NNMATCH", TestCLI.HCFS_NNMATCH); i++; } return args; } }