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.accumulo.test.scalability; import java.io.FileInputStream; import java.net.InetAddress; import java.util.Properties; import org.apache.accumulo.core.cli.Help; import org.apache.accumulo.core.util.CachedConfiguration; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.beust.jcommander.Parameter; public class Run { private static final Logger log = LoggerFactory.getLogger(Run.class); static class Opts extends Help { @Parameter(names = "--testId", required = true) String testId; @Parameter(names = "--action", required = true, description = "one of 'setup', 'teardown' or 'client'") String action; @Parameter(names = "--count", description = "number of tablet servers", required = true) int numTabletServers; } public static void main(String[] args) throws Exception { final String sitePath = "/tmp/scale-site.conf"; final String testPath = "/tmp/scale-test.conf"; Opts opts = new Opts(); opts.parseArgs(Run.class.getName(), args); Configuration conf = CachedConfiguration.getInstance(); FileSystem fs; fs = FileSystem.get(conf); fs.copyToLocalFile(new Path("/accumulo-scale/conf/site.conf"), new Path(sitePath)); fs.copyToLocalFile(new Path(String.format("/accumulo-scale/conf/%s.conf", opts.testId)), new Path(testPath)); // load configuration file properties Properties scaleProps = new Properties(); Properties testProps = new Properties(); try { FileInputStream fis = new FileInputStream(sitePath); try { scaleProps.load(fis); } finally { fis.close(); } fis = new FileInputStream(testPath); try { testProps.load(fis); } finally { fis.close(); } } catch (Exception e) { log.error("Error loading config file.", e); } ScaleTest test = (ScaleTest) Class .forName(String.format("org.apache.accumulo.test.scalability.%s", opts.testId)).newInstance(); test.init(scaleProps, testProps, opts.numTabletServers); if (opts.action.equalsIgnoreCase("setup")) { test.setup(); } else if (opts.action.equalsIgnoreCase("client")) { InetAddress addr = InetAddress.getLocalHost(); String host = addr.getHostName(); fs.createNewFile(new Path("/accumulo-scale/clients/" + host)); test.client(); fs.copyFromLocalFile(new Path("/tmp/scale.out"), new Path("/accumulo-scale/results/" + host)); } else if (opts.action.equalsIgnoreCase("teardown")) { test.teardown(); } } }