[14627] | 1 | /*
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| 2 | * Copyright 2000-2005 The Apache Software Foundation
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | *
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| 16 | */
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| 17 |
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| 18 | package org.apache.tools.ant.taskdefs;
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| 19 |
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| 20 | import java.io.File;
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| 21 | import java.io.IOException;
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| 22 | import java.io.PrintStream;
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| 23 | import java.lang.reflect.InvocationTargetException;
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| 24 | import java.lang.reflect.Method;
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| 25 | import java.lang.reflect.Modifier;
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| 26 | import org.apache.tools.ant.AntClassLoader;
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| 27 | import org.apache.tools.ant.BuildException;
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| 28 | import org.apache.tools.ant.Project;
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| 29 | import org.apache.tools.ant.ProjectComponent;
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| 30 | import org.apache.tools.ant.Task;
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| 31 | import org.apache.tools.ant.taskdefs.condition.Os;
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| 32 | import org.apache.tools.ant.types.Commandline;
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| 33 | import org.apache.tools.ant.types.CommandlineJava;
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| 34 | import org.apache.tools.ant.types.Path;
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| 35 | import org.apache.tools.ant.types.Permissions;
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| 36 | import org.apache.tools.ant.util.JavaEnvUtils;
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| 37 | import org.apache.tools.ant.util.TimeoutObserver;
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| 38 | import org.apache.tools.ant.util.Watchdog;
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| 39 |
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| 40 | /**
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| 41 | *
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| 42 | * @since Ant 1.2
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| 43 | */
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| 44 | public class ExecuteJava implements Runnable, TimeoutObserver {
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| 45 |
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| 46 | private Commandline javaCommand = null;
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| 47 | private Path classpath = null;
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| 48 | private CommandlineJava.SysProperties sysProperties = null;
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| 49 | private Permissions perm = null;
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| 50 | private Method main = null;
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| 51 | private Long timeout = null;
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| 52 | private Throwable caught = null;
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| 53 | private boolean timedOut = false;
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| 54 | private Thread thread = null;
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| 55 |
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| 56 | public void setJavaCommand(Commandline javaCommand) {
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| 57 | this.javaCommand = javaCommand;
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| 58 | }
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| 59 |
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| 60 | /**
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| 61 | * Set the classpath to be used when running the Java class
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| 62 | *
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| 63 | * @param p an Ant Path object containing the classpath.
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| 64 | */
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| 65 | public void setClasspath(Path p) {
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| 66 | classpath = p;
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| 67 | }
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| 68 |
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| 69 | public void setSystemProperties(CommandlineJava.SysProperties s) {
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| 70 | sysProperties = s;
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| 71 | }
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| 72 |
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| 73 | /**
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| 74 | * Permissions for the application run.
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| 75 | * @since Ant 1.6
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| 76 | * @param permissions
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| 77 | */
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| 78 | public void setPermissions(Permissions permissions) {
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| 79 | perm = permissions;
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| 80 | }
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| 81 |
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| 82 | /**
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| 83 | * All output (System.out as well as System.err) will be written
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| 84 | * to this Stream.
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| 85 | *
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| 86 | * @deprecated manage output at the task level
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| 87 | */
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| 88 | public void setOutput(PrintStream out) {
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| 89 | }
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| 90 |
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| 91 | /**
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| 92 | * @since Ant 1.5
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| 93 | */
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| 94 | public void setTimeout(Long timeout) {
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| 95 | this.timeout = timeout;
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| 96 | }
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| 97 |
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| 98 | public void execute(Project project) throws BuildException {
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| 99 | final String classname = javaCommand.getExecutable();
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| 100 |
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| 101 | AntClassLoader loader = null;
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| 102 | try {
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| 103 | if (sysProperties != null) {
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| 104 | sysProperties.setSystem();
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| 105 | }
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| 106 |
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| 107 | final Class[] param = {Class.forName("[Ljava.lang.String;")};
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| 108 | Class target = null;
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| 109 | if (classpath == null) {
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| 110 | target = Class.forName(classname);
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| 111 | } else {
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| 112 | loader = project.createClassLoader(classpath);
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| 113 | loader.setParent(project.getCoreLoader());
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| 114 | loader.setParentFirst(false);
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| 115 | loader.addJavaLibraries();
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| 116 | loader.setIsolated(true);
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| 117 | loader.setThreadContextLoader();
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| 118 | loader.forceLoadClass(classname);
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| 119 | target = Class.forName(classname, true, loader);
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| 120 | }
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| 121 | main = target.getMethod("main", param);
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| 122 | if (main == null) {
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| 123 | throw new BuildException("Could not find main() method in "
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| 124 | + classname);
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| 125 | }
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| 126 |
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| 127 | if ((main.getModifiers() & Modifier.STATIC) == 0) {
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| 128 | throw new BuildException("main() method in " + classname
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| 129 | + " is not declared static");
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| 130 | }
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| 131 |
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| 132 |
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| 133 | if (timeout == null) {
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| 134 | run();
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| 135 | } else {
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| 136 | thread = new Thread(this, "ExecuteJava");
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| 137 | Task currentThreadTask
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| 138 | = project.getThreadTask(Thread.currentThread());
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| 139 | project.registerThreadTask(thread, currentThreadTask);
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| 140 | // if we run into a timeout, the run-away thread shall not
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| 141 | // make the VM run forever - if no timeout occurs, Ant's
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| 142 | // main thread will still be there to let the new thread
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| 143 | // finish
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| 144 | thread.setDaemon(true);
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| 145 | Watchdog w = new Watchdog(timeout.longValue());
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| 146 | w.addTimeoutObserver(this);
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| 147 | synchronized (this) {
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| 148 | thread.start();
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| 149 | w.start();
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| 150 | try {
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| 151 | wait();
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| 152 | } catch (InterruptedException e) {
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| 153 | // ignore
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| 154 | }
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| 155 | if (timedOut) {
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| 156 | project.log("Timeout: sub-process interrupted",
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| 157 | Project.MSG_WARN);
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| 158 | } else {
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| 159 | thread = null;
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| 160 | w.stop();
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| 161 | }
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| 162 | }
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| 163 | }
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| 164 |
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| 165 | if (caught != null) {
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| 166 | throw caught;
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| 167 | }
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| 168 |
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| 169 | } catch (ClassNotFoundException e) {
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| 170 | throw new BuildException("Could not find " + classname + "."
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| 171 | + " Make sure you have it in your"
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| 172 | + " classpath");
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| 173 | } catch (BuildException e) {
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| 174 | throw e;
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| 175 | } catch (SecurityException e) {
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| 176 | throw e;
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| 177 | } catch (ThreadDeath e) {
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| 178 | throw e;
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| 179 | } catch (Throwable e) {
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| 180 | throw new BuildException(e);
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| 181 | } finally {
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| 182 | if (loader != null) {
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| 183 | loader.resetThreadContextLoader();
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| 184 | loader.cleanup();
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| 185 | loader = null;
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| 186 | }
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| 187 | if (sysProperties != null) {
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| 188 | sysProperties.restoreSystem();
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| 189 | }
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| 190 | }
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| 191 | }
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| 192 |
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| 193 | /**
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| 194 | * @since Ant 1.5
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| 195 | */
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| 196 | public void run() {
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| 197 | final Object[] argument = {javaCommand.getArguments()};
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| 198 | try {
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| 199 | if (perm != null) {
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| 200 | perm.setSecurityManager();
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| 201 | }
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| 202 | main.invoke(null, argument);
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| 203 | } catch (InvocationTargetException e) {
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| 204 | Throwable t = e.getTargetException();
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| 205 | if (!(t instanceof InterruptedException)) {
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| 206 | caught = t;
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| 207 | } /* else { swallow, probably due to timeout } */
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| 208 | } catch (Throwable t) {
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| 209 | caught = t;
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| 210 | } finally {
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| 211 | if (perm != null) {
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| 212 | perm.restoreSecurityManager();
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| 213 | }
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| 214 | synchronized (this) {
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| 215 | notifyAll();
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| 216 | }
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| 217 | }
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| 218 | }
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| 219 |
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| 220 | /**
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| 221 | * @since Ant 1.5
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| 222 | */
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| 223 | public synchronized void timeoutOccured(Watchdog w) {
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| 224 | if (thread != null) {
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| 225 | timedOut = true;
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| 226 | thread.interrupt();
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| 227 | }
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| 228 | notifyAll();
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| 229 | }
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| 230 |
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| 231 | /**
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| 232 | * @since 1.19, Ant 1.5
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| 233 | */
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| 234 | public synchronized boolean killedProcess() {
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| 235 | return timedOut;
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| 236 | }
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| 237 |
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| 238 | /**
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| 239 | * Runs the Java command in a separate VM, this does not give you
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| 240 | * the full flexibility of the Java task, but may be enough for
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| 241 | * simple needs.
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| 242 | *
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| 243 | * @since Ant 1.6.3
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| 244 | */
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| 245 | public int fork(ProjectComponent pc) throws BuildException {
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| 246 | CommandlineJava cmdl = new CommandlineJava();
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| 247 | cmdl.setClassname(javaCommand.getExecutable());
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| 248 | String[] args = javaCommand.getArguments();
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| 249 | for (int i = 0; i < args.length; i++) {
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| 250 | cmdl.createArgument().setValue(args[i]);
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| 251 | }
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| 252 | if (classpath != null) {
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| 253 | cmdl.createClasspath(pc.getProject()).append(classpath);
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| 254 | }
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| 255 | if (sysProperties != null) {
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| 256 | cmdl.addSysproperties(sysProperties);
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| 257 | }
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| 258 |
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| 259 | Redirector redirector = new Redirector(pc);
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| 260 | Execute exe
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| 261 | = new Execute(redirector.createHandler(),
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| 262 | timeout == null
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| 263 | ? null
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| 264 | : new ExecuteWatchdog(timeout.longValue()));
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| 265 | exe.setAntRun(pc.getProject());
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| 266 | exe.setCommandline(cmdl.getCommandline());
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| 267 |
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| 268 | try {
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| 269 | int rc = exe.execute();
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| 270 | redirector.complete();
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| 271 | timedOut = exe.killedProcess();
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| 272 | return rc;
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| 273 | } catch (IOException e) {
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| 274 | throw new BuildException(e);
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| 275 | }
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| 276 | }
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| 277 |
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| 278 | }
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