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.s4.tools; import java.io.File; import java.net.URI; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import org.I0Itec.zkclient.ZkClient; import org.apache.s4.comm.topology.ZNRecordSerializer; import org.apache.s4.core.util.AppConfig; import org.apache.s4.core.util.ParsingUtils; import org.apache.s4.deploy.DeploymentUtils; import org.gradle.tooling.BuildLauncher; import org.gradle.tooling.GradleConnector; import org.gradle.tooling.ProgressListener; import org.gradle.tooling.ProjectConnection; import org.slf4j.LoggerFactory; import com.beust.jcommander.Parameter; import com.beust.jcommander.Parameters; import com.google.common.base.Strings; /** * Deploys and S4 application configuration into the cluster manager */ public class Deploy extends S4ArgsBase { static org.slf4j.Logger logger = LoggerFactory.getLogger(Deploy.class); public static void main(String[] args) { DeployAppArgs deployArgs = new DeployAppArgs(); Tools.parseArgs(deployArgs, args); try { ZkClient zkClient = new ZkClient(deployArgs.zkConnectionString, deployArgs.timeout); zkClient.setZkSerializer(new ZNRecordSerializer()); URI s4rURI = null; if (deployArgs.s4rPath != null) { s4rURI = new URI(deployArgs.s4rPath); if (Strings.isNullOrEmpty(s4rURI.getScheme())) { // default is file s4rURI = new File(deployArgs.s4rPath).toURI(); } logger.info("Using specified S4R [{}]", s4rURI.toString()); } else { if (!Strings.isNullOrEmpty(deployArgs.appClass)) { // 3. otherwise if there is at least an app class specified (e.g. for running "s4 adapter"), we use // it and won't use an S4R logger.info( "No S4R path specified, nor build file specified: this assumes the app is in the classpath"); } else { logger.error("You must specify an S4R file or an appClass that will be in the classpath"); System.exit(1); } } DeploymentUtils.initAppConfig(new AppConfig.Builder().appName(deployArgs.appName) .appURI(s4rURI == null ? null : s4rURI.toString()) .customModulesNames(deployArgs.modulesClassesNames).customModulesURIs(deployArgs.modulesURIs) .appClassName(deployArgs.appClass) .namedParameters(ParsingUtils.convertListArgsToMap(deployArgs.extraNamedParameters)).build(), deployArgs.clusterName, false, deployArgs.zkConnectionString); // Explicitly shutdown the JVM since Gradle leaves non-daemon threads running that delay the termination if (!deployArgs.testMode) { System.exit(0); } } catch (Exception e) { LoggerFactory.getLogger(Deploy.class).error("Cannot deploy app", e); } } @Parameters(commandNames = "s4 deploy", commandDescription = "Package and deploy application to S4 cluster", separators = "=") static class DeployAppArgs extends S4ArgsBase { @Parameter(names = "-s4r", description = "URI to existing s4r file", required = false) String s4rPath; @Parameter(names = { "-a", "-appClass" }, description = "Full class name of the application class (extending App or AdapterApp)", required = false) String appClass = ""; @Parameter(names = "-appName", description = "Name of S4 application.", required = true) String appName; @Parameter(names = { "-c", "-cluster" }, description = "Logical name of the S4 cluster", required = true) String clusterName; @Parameter(names = "-zk", description = "ZooKeeper connection string") String zkConnectionString = "localhost:2181"; @Parameter(names = "-timeout", description = "Connection timeout to Zookeeper, in ms") int timeout = 10000; @Parameter(names = { "-modulesURIs", "-mu" }, description = "URIs for fetching code of custom modules") List<String> modulesURIs = new ArrayList<String>(); @Parameter(names = { "-modulesClasses", "-emc", "-mc" }, description = "Fully qualified class names of custom modules") List<String> modulesClassesNames = new ArrayList<String>(); @Parameter(names = { "-namedStringParameters", "-p" }, description = "Comma-separated list of inline configuration parameters. Syntax: '-p=name1=value1,name2=value2 '", hidden = false, converter = ParsingUtils.InlineConfigParameterConverter.class) List<String> extraNamedParameters = new ArrayList<String>(); @Parameter(names = "-testMode", description = "Special mode for regression testing", hidden = true) boolean testMode = false; @Parameter(names = "-debug", description = "Display debug information from the build system", arity = 0) boolean debug = false; } static class ExecGradle { public static void exec(File buildFile, String taskName, String[] params, boolean debug) throws Exception { ProjectConnection connection = GradleConnector.newConnector() .forProjectDirectory(buildFile.getParentFile()).connect(); try { BuildLauncher build = connection.newBuild(); // select tasks to run: build.forTasks(taskName); List<String> buildArgs = new ArrayList<String>(); // buildArgs.add("-b"); // buildArgs.add(buildFilePath); buildArgs.add("-stacktrace"); if (debug) { buildArgs.add("-debug"); } if (params.length > 0) { for (int i = 0; i < params.length; i++) { buildArgs.add("-P" + params[i]); } } logger.info(Arrays.toString(buildArgs.toArray())); build.withArguments(buildArgs.toArray(new String[] {})); // if you want to listen to the progress events: ProgressListener listener = null; // use your implementation // build.addProgressListener(listener); // kick the build off: build.run(); } finally { connection.close(); } } } }