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/*
* Copyright 2000-2005 The Apache Software Foundation
*
* Licensed 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.tools.ant.taskdefs;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.ExitException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.Commandline;
import org.apache.tools.ant.types.CommandlineJava;
import org.apache.tools.ant.types.Environment;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.types.PropertySet;
import org.apache.tools.ant.types.Reference;
import org.apache.tools.ant.types.Assertions;
import org.apache.tools.ant.types.Permissions;
import org.apache.tools.ant.types.RedirectorElement;
import org.apache.tools.ant.util.KeepAliveInputStream;
/**
* Launcher for Java applications. Allows use of
* the same JVM for the called application thus resulting in much
* faster operation.
*
* @since Ant 1.1
*
* @ant.task category="java"
*/
public class Java extends Task {
private CommandlineJava cmdl = new CommandlineJava();
private Environment env = new Environment();
private boolean fork = false;
private boolean newEnvironment = false;
private File dir = null;
private boolean failOnError = false;
private Long timeout = null;
//include locally for screening purposes
private String inputString;
private File input;
private File output;
private File error;
protected Redirector redirector = new Redirector(this);
protected RedirectorElement redirectorElement;
private String resultProperty;
private Permissions perm = null;
private boolean spawn = false;
private boolean incompatibleWithSpawn = false;
/**
* Do the execution.
* @throws BuildException if failOnError is set to true and the application
* returns a non 0 result code
*/
public void execute() throws BuildException {
File savedDir = dir;
Permissions savedPermissions = perm;
int err = -1;
try {
err = executeJava();
if (err != 0) {
if (failOnError) {
throw new BuildException("Java returned: " + err, getLocation());
} else {
log("Java Result: " + err, Project.MSG_ERR);
}
}
maybeSetResultPropertyValue(err);
} finally {
dir = savedDir;
perm = savedPermissions;
}
}
/**
* Do the execution and return a return code.
*
* @return the return code from the execute java class if it was
* executed in a separate VM (fork = "yes").
*
* @throws BuildException if required parameters are missing
*/
public int executeJava() throws BuildException {
String classname = cmdl.getClassname();
if (classname == null && cmdl.getJar() == null) {
throw new BuildException("Classname must not be null.");
}
if (!fork && cmdl.getJar() != null) {
throw new BuildException("Cannot execute a jar in non-forked mode."
+ " Please set fork='true'. ");
}
if (spawn && !fork) {
throw new BuildException("Cannot spawn a java process in non-forked mode."
+ " Please set fork='true'. ");
}
if (spawn && incompatibleWithSpawn) {
getProject().log("spawn does not allow attributes related to input, "
+ "output, error, result", Project.MSG_ERR);
getProject().log("spawn also does not allow timeout", Project.MSG_ERR);
getProject().log( "finally, spawn is not compatible "
+ "with a nested I/O ", Project.MSG_ERR);
throw new BuildException("You have used an attribute "
+ "or nested element which is not compatible with spawn");
}
if (cmdl.getAssertions() != null && !fork) {
log("Assertion statements are currently ignored in non-forked mode");
}
if (fork) {
if (perm != null) {
log("Permissions can not be set this way in forked mode.", Project.MSG_WARN);
}
log(cmdl.describeCommand(), Project.MSG_VERBOSE);
} else {
if (cmdl.getVmCommand().size() > 1) {
log("JVM args ignored when same JVM is used.",
Project.MSG_WARN);
}
if (dir != null) {
log("Working directory ignored when same JVM is used.",
Project.MSG_WARN);
}
if (newEnvironment || null != env.getVariables()) {
log("Changes to environment variables are ignored when same "
+ "JVM is used.", Project.MSG_WARN);
}
if (cmdl.getBootclasspath() != null) {
log("bootclasspath ignored when same JVM is used.",
Project.MSG_WARN);
}
if (perm == null && failOnError == true) {
perm = new Permissions(true);
log("running " + this.cmdl.getClassname()
+ " with default permissions (exit forbidden)", Project.MSG_VERBOSE);
}
log("Running in same VM " + cmdl.describeJavaCommand(),
Project.MSG_VERBOSE);
}
setupRedirector();
try {
if (fork) {
if (!spawn) {
return fork(cmdl.getCommandline());
} else {
spawn(cmdl.getCommandline());
return 0;
}
} else {
try {
run(cmdl);
return 0;
} catch (ExitException ex) {
return ex.getStatus();
}
}
} catch (BuildException e) {
if (e.getLocation() == null && getLocation() != null) {
e.setLocation(getLocation());
}
if (failOnError) {
throw e;
} else {
log(e);
return 0;
}
} catch (Throwable t) {
if (failOnError) {
throw new BuildException(t, getLocation());
} else {
log(t);
return 0;
}
}
}
/**
* set whether or not you want the process to be spawned
* default is not spawned
* @param spawn if true you do not want ant to wait for the end of the process
* @since ant 1.6
*/
public void setSpawn(boolean spawn) {
this.spawn = spawn;
}
/**
* Set the classpath to be used when running the Java class
*
* @param s an Ant Path object containing the classpath.
*/
public void setClasspath(Path s) {
createClasspath().append(s);
}
/**
* Adds a path to the classpath.
*
* @return created classpath
*/
public Path createClasspath() {
return cmdl.createClasspath(getProject()).createPath();
}
/**
* Adds a path to the bootclasspath.
* @since Ant 1.6
*
* @return created bootclasspath
*/
public Path createBootclasspath() {
return cmdl.createBootclasspath(getProject()).createPath();
}
/**
* Sets the permissions for the application run inside the same JVM.
* @since Ant 1.6
* @return .
*/
public Permissions createPermissions() {
if (perm == null) {
perm = new Permissions();
}
return perm;
}
/**
* Classpath to use, by reference.
*
* @param r a reference to an existing classpath
*/
public void setClasspathRef(Reference r) {
createClasspath().setRefid(r);
}
/**
* The location of the JAR file to execute.
*
* @param jarfile the jarfile that one wants to execute
*
* @throws BuildException if there is also a main class specified
*/
public void setJar(File jarfile) throws BuildException {
if (cmdl.getClassname() != null) {
throw new BuildException("Cannot use 'jar' and 'classname' "
+ "attributes in same command.");
}
cmdl.setJar(jarfile.getAbsolutePath());
}
/**
* Sets the Java class to execute.
*
* @param s the name of the main class
*
* @throws BuildException if the jar attribute has been set
*/
public void setClassname(String s) throws BuildException {
if (cmdl.getJar() != null) {
throw new BuildException("Cannot use 'jar' and 'classname' "
+ "attributes in same command");
}
cmdl.setClassname(s);
}
/**
* Deprecated: use nested arg instead.
* Set the command line arguments for the class.
*
* @param s arguments
*
* @ant.attribute ignore="true"
*/
public void setArgs(String s) {
log("The args attribute is deprecated. "
+ "Please use nested arg elements.", Project.MSG_WARN);
cmdl.createArgument().setLine(s);
}
/**
* Adds a command-line argument.
*
* @return created argument
*/
public Commandline.Argument createArg() {
return cmdl.createArgument();
}
/**
* The name of a property in which the return code of the
* command should be stored. Only of interest if failonerror=false.
*
* @param resultProperty name of property
*
* @since Ant 1.6
*/
public void setResultProperty(String resultProperty) {
this.resultProperty = resultProperty;
incompatibleWithSpawn = true;
}
/**
* helper method to set result property to the
* passed in value if appropriate
*
* @param result the exit code
*/
protected void maybeSetResultPropertyValue(int result) {
String res = Integer.toString(result);
if (resultProperty != null) {
getProject().setNewProperty(resultProperty, res);
}
}
/**
* If true, execute in a new VM.
*
* @param s do you want to run Java in a new VM.
*/
public void setFork(boolean s) {
this.fork = s;
}
/**
* Set the command line arguments for the JVM.
*
* @param s jvmargs
*/
public void setJvmargs(String s) {
log("The jvmargs attribute is deprecated. "
+ "Please use nested jvmarg elements.", Project.MSG_WARN);
cmdl.createVmArgument().setLine(s);
}
/**
* Adds a JVM argument.
*
* @return JVM argument created
*/
public Commandline.Argument createJvmarg() {
return cmdl.createVmArgument();
}
/**
* Set the command used to start the VM (only if forking).
*
* @param s command to start the VM
*/
public void setJvm(String s) {
cmdl.setVm(s);
}
/**
* Adds a system property.
*
* @param sysp system property
*/
public void addSysproperty(Environment.Variable sysp) {
cmdl.addSysproperty(sysp);
}
/**
* Adds a set of properties as system properties.
*
* @param sysp set of properties to add
*
* @since Ant 1.6
*/
public void addSyspropertyset(PropertySet sysp) {
cmdl.addSyspropertyset(sysp);
}
/**
* If true, then fail if the command exits with a
* returncode other than 0
*
* @param fail if true fail the build when the command exits with a non
* zero returncode
*/
public void setFailonerror(boolean fail) {
failOnError = fail;
incompatibleWithSpawn |= fail;
}
/**
* The working directory of the process
*
* @param d working directory
*
*/
public void setDir(File d) {
this.dir = d;
}
/**
* File the output of the process is redirected to.
*
* @param out name of the output file
*/
public void setOutput(File out) {
this.output = out;
incompatibleWithSpawn = true;
}
/**
* Set the input to use for the task
*
* @param input name of the input file
*/
public void setInput(File input) {
if (inputString != null) {
throw new BuildException("The \"input\" and \"inputstring\" "
+ "attributes cannot both be specified");
}
this.input = input;
incompatibleWithSpawn = true;
}
/**
* Set the string to use as input
*
* @param inputString the string which is used as the input source
*/
public void setInputString(String inputString) {
if (input != null) {
throw new BuildException("The \"input\" and \"inputstring\" "
+ "attributes cannot both be specified");
}
this.inputString = inputString;
incompatibleWithSpawn = true;
}
/**
* Controls whether error output of exec is logged. This is only useful
* when output is being redirected and error output is desired in the
* Ant log
*
* @param logError get in the ant log the messages coming from stderr
* in the case that fork = true
*/
public void setLogError(boolean logError) {
redirector.setLogError(logError);
incompatibleWithSpawn |= logError;
}
/**
* File the error stream of the process is redirected to.
*
* @param error file getting the error stream
*
* @since ant 1.6
*/
public void setError(File error) {
this.error = error;
incompatibleWithSpawn = true;
}
/**
* Property name whose value should be set to the output of
* the process.
*
* @param outputProp property name
*
*/
public void setOutputproperty(String outputProp) {
redirector.setOutputProperty(outputProp);
incompatibleWithSpawn = true;
}
/**
* Property name whose value should be set to the error of
* the process.
*
* @param errorProperty property name
*
* @since ant 1.6
*/
public void setErrorProperty(String errorProperty) {
redirector.setErrorProperty(errorProperty);
incompatibleWithSpawn = true;
}
/**
* Corresponds to -mx or -Xmx depending on VM version.
*
* @param max max memory parameter
*/
public void setMaxmemory(String max) {
cmdl.setMaxmemory(max);
}
/**
* Sets the JVM version.
* @param value JVM version
*/
public void setJVMVersion(String value) {
cmdl.setVmversion(value);
}
/**
* Adds an environment variable.
*
* Will be ignored if we are not forking a new VM.
*
* @param var new environment variable
*
* @since Ant 1.5
*/
public void addEnv(Environment.Variable var) {
env.addVariable(var);
}
/**
* If true, use a completely new environment.
*
*
Will be ignored if we are not forking a new VM.
*
* @param newenv if true, use a completely new environment.
*
* @since Ant 1.5
*/
public void setNewenvironment(boolean newenv) {
newEnvironment = newenv;
}
/**
* If true, append output to existing file.
*
* @param append if true, append output to existing file
*
* @since Ant 1.5
*/
public void setAppend(boolean append) {
redirector.setAppend(append);
incompatibleWithSpawn = true;
}
/**
* Timeout in milliseconds after which the process will be killed.
*
* @param value time out in milliseconds
*
* @since Ant 1.5
*/
public void setTimeout(Long value) {
timeout = value;
incompatibleWithSpawn |= timeout != null;
}
/**
* assertions to enable in this program (if fork=true)
* @since Ant 1.6
* @param asserts assertion set
*/
public void addAssertions(Assertions asserts) {
if(cmdl.getAssertions() != null) {
throw new BuildException("Only one assertion declaration is allowed");
}
cmdl.setAssertions(asserts);
}
/**
* Add a RedirectorElement to this task.
* @param redirectorElement RedirectorElement.
*/
public void addConfiguredRedirector(RedirectorElement redirectorElement) {
if (this.redirectorElement != null) {
throw new BuildException("cannot have > 1 nested s");
} else {
this.redirectorElement = redirectorElement;
incompatibleWithSpawn = true;
}
}
/**
* Pass output sent to System.out to specified output file.
*
* @param output a string of output on its way to the handlers
*
* @since Ant 1.5
*/
protected void handleOutput(String output) {
if (redirector.getOutputStream() != null) {
redirector.handleOutput(output);
} else {
super.handleOutput(output);
}
}
/**
* Handle an input request by this task
*
* @param buffer the buffer into which data is to be read.
* @param offset the offset into the buffer at which data is stored.
* @param length the amount of data to read
*
* @return the number of bytes read
*
* @exception IOException if the data cannot be read
* @since Ant 1.6
*/
public int handleInput(byte[] buffer, int offset, int length)
throws IOException {
// Should work whether or not redirector.inputStream == null:
return redirector.handleInput(buffer, offset, length);
}
/**
* Pass output sent to System.out to specified output file.
*
* @param output string of output on its way to its handlers
*
* @since Ant 1.5.2
*/
protected void handleFlush(String output) {
if (redirector.getOutputStream() != null) {
redirector.handleFlush(output);
} else {
super.handleFlush(output);
}
}
/**
* Handle output sent to System.err
*
* @param output string of stderr
*
* @since Ant 1.5
*/
protected void handleErrorOutput(String output) {
if (redirector.getErrorStream() != null) {
redirector.handleErrorOutput(output);
} else {
super.handleErrorOutput(output);
}
}
/**
* Handle output sent to System.err and flush the stream.
*
* @param output string of stderr
*
* @since Ant 1.5.2
*/
protected void handleErrorFlush(String output) {
if (redirector.getErrorStream() != null) {
redirector.handleErrorFlush(output);
} else {
super.handleErrorOutput(output);
}
}
/**
* Set up properties on the redirector that we needed to store locally.
*/
protected void setupRedirector() {
redirector.setInput(input);
redirector.setInputString(inputString);
redirector.setOutput(output);
redirector.setError(error);
if (redirectorElement != null) {
redirectorElement.configure(redirector);
}
if (!spawn && input == null && inputString == null) {
// #24918: send standard input to the process by default.
redirector.setInputStream(new KeepAliveInputStream(getProject().getDefaultInputStream()));
}
}
/**
* Executes the given classname with the given arguments as it
* was a command line application.
*/
private void run(CommandlineJava command) throws BuildException {
try {
ExecuteJava exe = new ExecuteJava();
exe.setJavaCommand(command.getJavaCommand());
exe.setClasspath(command.getClasspath());
exe.setSystemProperties(command.getSystemProperties());
exe.setPermissions(perm);
exe.setTimeout(timeout);
redirector.createStreams();
exe.execute(getProject());
redirector.complete();
if (exe.killedProcess()) {
throw new BuildException("Timeout: killed the sub-process");
}
} catch (IOException e) {
throw new BuildException(e);
}
}
/**
* Executes the given classname with the given arguments in a separate VM.
*/
private int fork(String[] command) throws BuildException {
Execute exe
= new Execute(redirector.createHandler(), createWatchdog());
exe.setAntRun(getProject());
if (dir == null) {
dir = getProject().getBaseDir();
} else if (!dir.exists() || !dir.isDirectory()) {
throw new BuildException(dir.getAbsolutePath()
+ " is not a valid directory",
getLocation());
}
exe.setWorkingDirectory(dir);
String[] environment = env.getVariables();
if (environment != null) {
for (int i = 0; i < environment.length; i++) {
log("Setting environment variable: " + environment[i],
Project.MSG_VERBOSE);
}
}
exe.setNewenvironment(newEnvironment);
exe.setEnvironment(environment);
exe.setCommandline(command);
try {
int rc = exe.execute();
redirector.complete();
if (exe.killedProcess()) {
throw new BuildException("Timeout: killed the sub-process");
}
return rc;
} catch (IOException e) {
throw new BuildException(e, getLocation());
}
}
/**
* Executes the given classname with the given arguments in a separate VM.
*/
private void spawn(String[] command) throws BuildException {
Execute exe
= new Execute();
exe.setAntRun(getProject());
if (dir == null) {
dir = getProject().getBaseDir();
} else if (!dir.exists() || !dir.isDirectory()) {
throw new BuildException(dir.getAbsolutePath()
+ " is not a valid directory",
getLocation());
}
exe.setWorkingDirectory(dir);
String[] environment = env.getVariables();
if (environment != null) {
for (int i = 0; i < environment.length; i++) {
log("Setting environment variable: " + environment[i],
Project.MSG_VERBOSE);
}
}
exe.setNewenvironment(newEnvironment);
exe.setEnvironment(environment);
exe.setCommandline(command);
try {
exe.spawn();
} catch (IOException e) {
throw new BuildException(e, getLocation());
}
}
/**
* Executes the given classname with the given arguments as it
* was a command line application.
*
* @param classname the name of the class to run
* @param args arguments for the class
* @throws BuildException in case of IO Exception in the execution
*/
protected void run(String classname, Vector args) throws BuildException {
CommandlineJava cmdj = new CommandlineJava();
cmdj.setClassname(classname);
for (int i = 0; i < args.size(); i++) {
cmdj.createArgument().setValue((String) args.elementAt(i));
}
run(cmdj);
}
/**
* Clear out the arguments to this java task.
*/
public void clearArgs() {
cmdl.clearJavaArgs();
}
/**
* Create the Watchdog to kill a runaway process.
*
* @return new watchdog
*
* @throws BuildException under unknown circumstances
*
* @since Ant 1.5
*/
protected ExecuteWatchdog createWatchdog() throws BuildException {
if (timeout == null) {
return null;
}
return new ExecuteWatchdog(timeout.longValue());
}
/**
* @since 1.6.2
*/
private void log(Throwable t) {
StringWriter sw = new StringWriter();
PrintWriter w = new PrintWriter(sw);
t.printStackTrace(w);
w.close();
log(sw.toString(), Project.MSG_ERR);
}
/**
* accessor to the command line
*
* @return the current command line
* @since 1.6.3
*/
public CommandlineJava getCommandLine() {
return cmdl;
}
/**
* get the system properties of the command line
*
* @return the current properties of this java invocation
* @since 1.6.3
*/
public CommandlineJava.SysProperties getSysProperties() {
return cmdl.getSystemProperties();
}
}