org.apache.tools.ant.taskdefs
Class Java

java.lang.Object
  extended by org.apache.tools.ant.ProjectComponent
      extended by org.apache.tools.ant.Task
          extended by org.apache.tools.ant.taskdefs.Java
All Implemented Interfaces:
java.lang.Cloneable
Direct Known Subclasses:
StyleBook

public class Java
extends Task

Launcher for Java applications. Allows use of the same JVM for the called application thus resulting in much faster operation.

Since:
Ant 1.1

Field Summary
protected  Redirector redirector
           
protected  RedirectorElement redirectorElement
           
 
Fields inherited from class org.apache.tools.ant.Task
target, taskName, taskType, wrapper
 
Fields inherited from class org.apache.tools.ant.ProjectComponent
description, location, project
 
Constructor Summary
Java()
          Normal constructor
Java(Task owner)
          create a bound task
 
Method Summary
 void addAssertions(Assertions asserts)
          Add assertions to enable in this program (if fork=true).
 void addConfiguredRedirector(RedirectorElement redirectorElement)
          Add a RedirectorElement to this task.
 void addEnv(Environment.Variable var)
          Add an environment variable.
 void addSysproperty(Environment.Variable sysp)
          Add a system property.
 void addSyspropertyset(PropertySet sysp)
          Add a set of properties as system properties.
 void clearArgs()
          Clear out the arguments to this java task.
 Commandline.Argument createArg()
          Add a command-line argument.
 Path createBootclasspath()
          Add a path to the bootclasspath.
 Path createClasspath()
          Add a path to the classpath.
 Commandline.Argument createJvmarg()
          Adds a JVM argument.
 Permissions createPermissions()
          Set the permissions for the application run inside the same JVM.
protected  ExecuteWatchdog createWatchdog()
          Create the Watchdog to kill a runaway process.
 void execute()
          Do the execution.
 int executeJava()
          Do the execution and return a return code.
 CommandlineJava getCommandLine()
          Accessor to the command line.
 CommandlineJava.SysProperties getSysProperties()
          Get the system properties of the command line.
protected  void handleErrorFlush(java.lang.String output)
          Handle output sent to System.err and flush the stream.
protected  void handleErrorOutput(java.lang.String output)
          Handle output sent to System.err.
protected  void handleFlush(java.lang.String output)
          Pass output sent to System.out to specified output file.
 int handleInput(byte[] buffer, int offset, int length)
          Handle an input request by this task.
protected  void handleOutput(java.lang.String output)
          Pass output sent to System.out to specified output file.
protected  void maybeSetResultPropertyValue(int result)
          Helper method to set result property to the passed in value if appropriate.
protected  void run(java.lang.String classname, java.util.Vector args)
          Executes the given classname with the given arguments as if it were a command line application.
 void setAppend(boolean append)
          If true, append output to existing file.
 void setArgs(java.lang.String s)
          Deprecated: use nested arg instead.
 void setClassname(java.lang.String s)
          Set the Java class to execute.
 void setClasspath(Path s)
          Set the classpath to be used when running the Java class.
 void setClasspathRef(Reference r)
          Set the classpath to use by reference.
 void setCloneVm(boolean cloneVm)
          If set, system properties will be copied to the cloned VM--as well as the bootclasspath unless you have explicitly specified a bootclaspath.
 void setDir(java.io.File d)
          Set the working directory of the process.
 void setError(java.io.File error)
          Set the File to which the error stream of the process is redirected.
 void setErrorProperty(java.lang.String errorProperty)
          Set the property name whose value should be set to the error of the process.
 void setFailonerror(boolean fail)
          If true, then fail if the command exits with a returncode other than zero.
 void setFork(boolean s)
          If true, execute in a new VM.
 void setInput(java.io.File input)
          Set the input to use for the task.
 void setInputString(java.lang.String inputString)
          Set the string to use as input.
 void setJar(java.io.File jarfile)
          Set the location of the JAR file to execute.
 void setJvm(java.lang.String s)
          Set the command used to start the VM (only if forking).
 void setJvmargs(java.lang.String s)
          Set the command line arguments for the JVM.
 void setJVMVersion(java.lang.String value)
          Set the JVM version.
 void setLogError(boolean logError)
          Set whether error output of exec is logged.
 void setMaxmemory(java.lang.String max)
          Corresponds to -mx or -Xmx depending on VM version.
 void setNewenvironment(boolean newenv)
          If true, use a completely new environment.
 void setOutput(java.io.File out)
          Set the File to which the output of the process is redirected.
 void setOutputproperty(java.lang.String outputProp)
          Set the property name whose value should be set to the output of the process.
 void setResultProperty(java.lang.String resultProperty)
          Set the name of the property in which the return code of the command should be stored.
 void setSpawn(boolean spawn)
          Set whether or not you want the process to be spawned; default is not spawned.
 void setTimeout(java.lang.Long value)
          Set the timeout in milliseconds after which the process will be killed.
protected  void setupRedirector()
          Set up properties on the redirector that we needed to store locally.
 
Methods inherited from class org.apache.tools.ant.Task
bindToOwner, getOwningTarget, getRuntimeConfigurableWrapper, getTaskName, getTaskType, getWrapper, init, isInvalid, log, log, log, log, maybeConfigure, perform, reconfigure, setOwningTarget, setRuntimeConfigurableWrapper, setTaskName, setTaskType
 
Methods inherited from class org.apache.tools.ant.ProjectComponent
clone, getDescription, getLocation, getProject, setDescription, setLocation, setProject
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

redirector

protected Redirector redirector

redirectorElement

protected RedirectorElement redirectorElement
Constructor Detail

Java

public Java()
Normal constructor


Java

public Java(Task owner)
create a bound task

Parameters:
owner - owner
Method Detail

execute

public void execute()
             throws BuildException
Do the execution.

Overrides:
execute in class Task
Throws:
BuildException - if failOnError is set to true and the application returns a nonzero result code.

executeJava

public int executeJava()
                throws BuildException
Do the execution and return a return code.

Returns:
the return code from the execute java class if it was executed in a separate VM (fork = "yes") or a security manager was installed that prohibits ExitVM (default).
Throws:
BuildException - if required parameters are missing.

setSpawn

public void setSpawn(boolean spawn)
Set whether or not you want the process to be spawned; default is not spawned.

Parameters:
spawn - if true you do not want Ant to wait for the end of the process.
Since:
Ant 1.6

setClasspath

public void setClasspath(Path s)
Set the classpath to be used when running the Java class.

Parameters:
s - an Ant Path object containing the classpath.

createClasspath

public Path createClasspath()
Add a path to the classpath.

Returns:
created classpath.

createBootclasspath

public Path createBootclasspath()
Add a path to the bootclasspath.

Returns:
created bootclasspath.
Since:
Ant 1.6

createPermissions

public Permissions createPermissions()
Set the permissions for the application run inside the same JVM.

Returns:
Permissions.
Since:
Ant 1.6

setClasspathRef

public void setClasspathRef(Reference r)
Set the classpath to use by reference.

Parameters:
r - a reference to an existing classpath.

setJar

public void setJar(java.io.File jarfile)
            throws BuildException
Set the location of the JAR file to execute.

Parameters:
jarfile - the jarfile to execute.
Throws:
BuildException - if there is also a main class specified.

setClassname

public void setClassname(java.lang.String s)
                  throws BuildException
Set the Java class to execute.

Parameters:
s - the name of the main class.
Throws:
BuildException - if the jar attribute has been set.

setArgs

public void setArgs(java.lang.String s)
Deprecated: use nested arg instead. Set the command line arguments for the class.

Parameters:
s - arguments.

setCloneVm

public void setCloneVm(boolean cloneVm)
If set, system properties will be copied to the cloned VM--as well as the bootclasspath unless you have explicitly specified a bootclaspath.

Doesn't have any effect unless fork is true.

Parameters:
cloneVm - if true copy system properties.
Since:
Ant 1.7

createArg

public Commandline.Argument createArg()
Add a command-line argument.

Returns:
created argument.

setResultProperty

public void setResultProperty(java.lang.String resultProperty)
Set the name of the property in which the return code of the command should be stored. Only of interest if failonerror=false.

Parameters:
resultProperty - name of property.
Since:
Ant 1.6

maybeSetResultPropertyValue

protected void maybeSetResultPropertyValue(int result)
Helper method to set result property to the passed in value if appropriate.

Parameters:
result - the exit code

setFork

public void setFork(boolean s)
If true, execute in a new VM.

Parameters:
s - do you want to run Java in a new VM.

setJvmargs

public void setJvmargs(java.lang.String s)
Set the command line arguments for the JVM.

Parameters:
s - jvmargs.

createJvmarg

public Commandline.Argument createJvmarg()
Adds a JVM argument.

Returns:
JVM argument created.

setJvm

public void setJvm(java.lang.String s)
Set the command used to start the VM (only if forking).

Parameters:
s - command to start the VM.

addSysproperty

public void addSysproperty(Environment.Variable sysp)
Add a system property.

Parameters:
sysp - system property.

addSyspropertyset

public void addSyspropertyset(PropertySet sysp)
Add a set of properties as system properties.

Parameters:
sysp - set of properties to add.
Since:
Ant 1.6

setFailonerror

public void setFailonerror(boolean fail)
If true, then fail if the command exits with a returncode other than zero.

Parameters:
fail - if true fail the build when the command exits with a nonzero returncode.

setDir

public void setDir(java.io.File d)
Set the working directory of the process.

Parameters:
d - working directory.

setOutput

public void setOutput(java.io.File out)
Set the File to which the output of the process is redirected.

Parameters:
out - the output File.

setInput

public void setInput(java.io.File input)
Set the input to use for the task.

Parameters:
input - name of the input file.

setInputString

public void setInputString(java.lang.String inputString)
Set the string to use as input.

Parameters:
inputString - the string which is used as the input source.

setLogError

public void setLogError(boolean logError)
Set 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.

Parameters:
logError - get in the ant log the messages coming from stderr in the case that fork = true.

setError

public void setError(java.io.File error)
Set the File to which the error stream of the process is redirected.

Parameters:
error - file getting the error stream.
Since:
Ant 1.6

setOutputproperty

public void setOutputproperty(java.lang.String outputProp)
Set the property name whose value should be set to the output of the process.

Parameters:
outputProp - property name.

setErrorProperty

public void setErrorProperty(java.lang.String errorProperty)
Set the property name whose value should be set to the error of the process.

Parameters:
errorProperty - property name.
Since:
Ant 1.6

setMaxmemory

public void setMaxmemory(java.lang.String max)
Corresponds to -mx or -Xmx depending on VM version.

Parameters:
max - max memory parameter.

setJVMVersion

public void setJVMVersion(java.lang.String value)
Set the JVM version.

Parameters:
value - JVM version.

addEnv

public void addEnv(Environment.Variable var)
Add an environment variable.

Will be ignored if we are not forking a new VM.

Parameters:
var - new environment variable.
Since:
Ant 1.5

setNewenvironment

public void setNewenvironment(boolean newenv)
If true, use a completely new environment.

Will be ignored if we are not forking a new VM.

Parameters:
newenv - if true, use a completely new environment.
Since:
Ant 1.5

setAppend

public void setAppend(boolean append)
If true, append output to existing file.

Parameters:
append - if true, append output to existing file.
Since:
Ant 1.5

setTimeout

public void setTimeout(java.lang.Long value)
Set the timeout in milliseconds after which the process will be killed.

Parameters:
value - timeout in milliseconds.
Since:
Ant 1.5

addAssertions

public void addAssertions(Assertions asserts)
Add assertions to enable in this program (if fork=true).

Parameters:
asserts - assertion set.
Since:
Ant 1.6

addConfiguredRedirector

public void addConfiguredRedirector(RedirectorElement redirectorElement)
Add a RedirectorElement to this task.

Parameters:
redirectorElement - RedirectorElement.

handleOutput

protected void handleOutput(java.lang.String output)
Pass output sent to System.out to specified output file.

Overrides:
handleOutput in class Task
Parameters:
output - a string of output on its way to the handlers.
Since:
Ant 1.5

handleInput

public int handleInput(byte[] buffer,
                       int offset,
                       int length)
                throws java.io.IOException
Handle an input request by this task.

Overrides:
handleInput in class Task
Parameters:
buffer - the buffer into which data is to be read.
offset - the offset into the buffer at which data is stored.
length - the amount of data to read.
Returns:
the number of bytes read.
Throws:
java.io.IOException - if the data cannot be read.
Since:
Ant 1.6

handleFlush

protected void handleFlush(java.lang.String output)
Pass output sent to System.out to specified output file.

Overrides:
handleFlush in class Task
Parameters:
output - string of output on its way to its handlers.
Since:
Ant 1.5.2

handleErrorOutput

protected void handleErrorOutput(java.lang.String output)
Handle output sent to System.err.

Overrides:
handleErrorOutput in class Task
Parameters:
output - string of stderr.
Since:
Ant 1.5

handleErrorFlush

protected void handleErrorFlush(java.lang.String output)
Handle output sent to System.err and flush the stream.

Overrides:
handleErrorFlush in class Task
Parameters:
output - string of stderr.
Since:
Ant 1.5.2

setupRedirector

protected void setupRedirector()
Set up properties on the redirector that we needed to store locally.


run

protected void run(java.lang.String classname,
                   java.util.Vector args)
            throws BuildException
Executes the given classname with the given arguments as if it were a command line application.

Parameters:
classname - the name of the class to run.
args - arguments for the class.
Throws:
BuildException - in case of IOException in the execution.

clearArgs

public void clearArgs()
Clear out the arguments to this java task.


createWatchdog

protected ExecuteWatchdog createWatchdog()
                                  throws BuildException
Create the Watchdog to kill a runaway process.

Returns:
new watchdog.
Throws:
BuildException - under unknown circumstances.
Since:
Ant 1.5

getCommandLine

public CommandlineJava getCommandLine()
Accessor to the command line.

Returns:
the current command line.
Since:
1.6.3

getSysProperties

public CommandlineJava.SysProperties getSysProperties()
Get the system properties of the command line.

Returns:
the current properties of this java invocation.
Since:
1.6.3