calling ant from java program 2004-08-30 - By Velagapudi, Murali
I am able to run ant from java program with the way mentioned by you ,but
if there are any optional tasks
it is giving the errors or "could not create task" for that optional task,where
as if run the same build.xml with
optional task using ant command it executes very well, the problem persists
only if i am calling that java program
and that too it should have optional task,here am i missing any classpath or
any some thing like that
i even tried with executing java -cp option but still it doesn't work ,any help
would be great.
thanks,
Murali
-----Original Message-----
From: Olivier Croisier [mailto:Olivier.Croisier@(protected)]
Sent: Wednesday, August 25, 2004 11:44 AM
To: Ant Users List
Subject: Re: calling ant from java program
> How can I call a ant task from java program?
> Regds
> Ashutosh
Here is some code I wrote.
It allows you to run any ant target from within a regular Java app.
You'll need ant-launcher.jar and ant.jar for this class to compile.
Enjoy :)
BTW, any comment/idea/debug/fix welcome !
import org.apache.tools.ant.*;
import java.io.*;
import java.util.*;
/**
* <PRE>
* This class is designed to call Ant targets from any Java application.
* 1. Initialize a new Project by calling "init"
* 2. Feed Ant with some properties by calling "setProperties" (optional)
* 3. Run an Ant target by calling "runTarget"
*
*
* Example :
*
* try
* {
* //init
* init("/home/me/build.xml","/home/me/");
* //properties
* HashMap m = new HashMap();
* m.put("event", "test");
* m.put("subject", "sujet java 3");
* m.put("message", "message java 3");
* setProperties(m, false);
* //run
* runTarget("test");
* } catch (Exception e) { e.printStackTrace(); }
* </PRE>
*
* @(protected) croisier
*/
public class AntRunner
{
private Project project;
/**
* Initializes a new Ant Project.
* @(protected) _buildFile The build File to use. If none is provided, it will
be defaulted to "build.xml".
* @(protected) _baseDir The project's base directory. If none is provided, will
be defaulted to "." (the current directory).
* @(protected) Exception Exceptions are self-explanatory (read their Message)
*/
public void init(String _buildFile, String _baseDir) throws Exception
{
// Create a new project, and perform some default initialization
project = new Project();
try { project.init(); }
catch (BuildException e)
{ throw new Exception("The default task list could not be loaded."
); }
// Set the base directory. If none is given, "." is used.
if (_baseDir == null) _baseDir=new String(".");
try { project.setBasedir(_baseDir); }
catch (BuildException e)
{ throw new Exception("The given basedir doesn't exist, or isn't a
directory."); }
// Parse the given buildfile. If none is given, "build.xml" is used.
if (_buildFile == null) _buildFile=new String("build.xml");
try { ProjectHelper.getProjectHelper().parse(project, new File(
_buildFile)); }
catch (BuildException e)
{ throw new Exception("Configuration file "+_buildFile+" is
invalid, or cannot be read."); }
}
/**
* Sets the project's properties.
* May be called to set project-wide properties, or just before a target
call to set target-related properties only.
* @(protected) _properties A map containing the properties' name/value couples
* @(protected) _overridable If set, the provided properties values may be
overriden by the config file's values
* @(protected) Exception Exceptions are self-explanatory (read their Message)
*/
public void setProperties(Map _properties, boolean _overridable) throws
Exception
{
// Test if the project exists
if (project == null) throw new Exception("Properties cannot be set
because the project has not been initialized. Please call the 'init' method
first !");
// Property hashmap is null
if (_properties == null) throw new Exception("The provided property
map is null.");
// Loop through the property map
Set propertyNames = _properties.keySet();
Iterator iter = propertyNames.iterator();
while (iter.hasNext())
{
// Get the property's name and value
String propertyName = (String) iter.next();
String propertyValue = (String) _properties.get(propertyName);
if (propertyValue == null) continue;
// Set the properties
if (_overridable) project.setProperty(propertyName, propertyValue);
else project.setUserProperty(propertyName, propertyValue);
}
}
/**
* Runs the given Target.
* @(protected) _target The name of the target to run. If null, the project's
default target will be used.
* @(protected) Exception Exceptions are self-explanatory (read their Message)
*/
public void runTarget(String _target) throws Exception
{
// Test if the project exists
if (project == null) throw new Exception("No target can be launched
because the project has not been initialized. Please call the 'init' method
first !");
// If no target is specified, run the default one.
if (_target == null) _target = project.getDefaultTarget();
// Run the target
try { project.executeTarget(_target); }
catch (BuildException e)
{ throw new Exception(e.getMessage()); }
}
}
--
CROISIER Olivier
Software Engineer
Thales IS - ANS
olivier.croisier@(protected)
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