在eclipse中集成自定义的执行任务

因为实在没有充裕时间,本文的内容只能点到即止。
在ecipse中,一个任务的运行可能有几种方式可供选择,最常用的就是”Java Application”,”Junit”,”Eclipse Application” 等。运用eclipse的插件机制,可以在其中定义自己的任务类型。
以TOS(Talend Open Studio, http://www.talend.com)中的Job运行为例
< extension
id ="org.talend.designer.runprocess.debug"
name
="TalendJobDebugger"
point
="org.eclipse.debug.core.launchConfigurationTypes" >
< launchConfigurationType
name ="TalendJob"
delegate
="org.talend.designer.core.debug.JobLaunchConfigurationDelegate"
modes
="run"
public
="true"
id
="org.talend.designer.runprocess.jobLaunchConfiguration" >
</ launchConfigurationType >
</ extension >

< extension
point ="org.eclipse.debug.ui.launchConfigurationTypeImages" >
< launchConfigurationTypeImage
icon ="icons/process_icon.gif"
configTypeID
="org.talend.designer.runprocess.jobLaunchConfiguration"
id
="org.talend.designer.runprocess.launchImage" >
</ launchConfigurationTypeImage >
</ extension >
org.eclipse.debug.core.launchConfigurationTypes 用来使自定义的任务类型集成进 eclipse "org.eclipse.debug.ui.launchConfigurationTypeImages 定义了显示的图标。
org.talend.designer.core.debug.JobLaunchConfigurationDelegate 实现了接口 IlaunchConfigurationDelegate, 方法
public void launch(ILaunchConfiguration configuration , String mode , ILaunch launch , IProgressMonitor monitor ) throws CoreException
定义了要执行的动作,相应的持久化数据在 IlaunchConfiguration 中取得。
ILaunchConfiguration用来进行相应数据的持久化。
2 定义 org.eclipse.debug.ui.launchShortcuts 扩展
< extension
point ="org.eclipse.debug.ui.launchShortcuts" >
< shortcut
category ="org.talend.rcp.perspective"
class
="org.talend.designer.core.debug.JobLaunchShortcut"
icon
="platform:/plugin/org.talend.core/icons/process_icon.gif"
id
="org.talend.designer.runprocess.debug.JobLaunchShortcut"
label
="Job"
modes
="run,debug" >

< contextualLaunch >
< enablement >
< with variable ="selection" >
< count value ="1" />
</ with >
</ enablement >
</ contextualLaunch >
</ shortcut >
</ extension >
实现了此扩展,相当于提供了自定义任务运行的入口,在 eclipse toolbar 的“ Run As” 和“ Debug As” 上就会出现该定义的选项。

org.talend.designer.core.debug.JobLaunchShortcut 实现了接口 IlaunchShorcut, 2launch方法实现中定义如何运行任务,类的实现如下:

DebugUITools.launch(config,mode); 中会调用eclipse的添加最近执行列表功能,以及执行JobLaunchConfigurationDelegate的launch()方法。

public class JobLaunchShortcut implements ILaunchShortcut ... {

/***//**
*
*/

publicstaticfinalStringJOB_NAME="TALEND_JOB_NAME";

/**//*
*Identifierforjobconfigurationtype
*/

publicstaticfinalStringJOB_DEBUG_LAUNCH_CONFIGURATION_TYPE="org.talend.designer.runprocess.jobLaunchConfiguration";

/***//**
*Locatesalaunchableentityinthegivenselectionandlaunchesanapplicationinthespecifiedmode.
*
*
@seeorg.eclipse.debug.ui.ILaunchShortcut#launch(org.eclipse.jface.viewers.ISelection,java.lang.String)
*
*
@paramselectionworkbenchselection
*
@parammodeoneofthelaunchmodesdefinedbythelaunchmanager
*
@seeorg.eclipse.debug.core.ILaunchManager
*/

publicvoidlaunch(ISelectionselection,Stringmode)...{
if(selectioninstanceofIStructuredSelection)...{
Objectobject
=((IStructuredSelection)selection).getFirstElement();

if(objectinstanceofRepositoryNode)...{
RepositoryNodenode
=(RepositoryNode)object;
launch(node.getObject().getProperty().getItem(),mode);
}

}

}


/***//**
*Locatesalaunchableentityinthegivenactiveeditor,andlaunchesanapplicationinthespecifiedmode.
*
*
@seeorg.eclipse.debug.ui.ILaunchShortcut#launch(org.eclipse.ui.IEditorPart,java.lang.String)
*
*
@parameditortheactiveeditorintheworkbench
*
@parammodeoneofthelaunchmodesdefinedbythelaunchmanager
*
@seeorg.eclipse.debug.core.ILaunchManager
*/

publicvoidlaunch(IEditorParteditor,Stringmode)...{
if(editor.getSite().getId().equals(MultiPageTalendEditor.ID))...{
RepositoryEditorInputinput
=(RepositoryEditorInput)editor.getEditorInput();
launch(input.getItem(),mode);
}

}


/***//**
*bqianCommentmethod"launch".
*
*
@paramobject
*
@parammode
*/

privatevoidlaunch(Itemitem,Stringmode)...{
if(iteminstanceofProcessItem)...{
ILaunchConfigurationconfig
=findLaunchConfiguration((ProcessItem)item,mode);
if(config!=null)...{
DebugUITools.launch(config,mode);
}

}

}


/***//**
*Ifre-usableconfigurationassociatedwiththeFileandtheprojectexist,thisconfigurationisreturned.
*Otherwiseanewconfigurationiscreated.
*
*
@parambin
*
@parammode
*
@returnare-useableornewconfigor<code>null</code>ifnone
*/

privateILaunchConfigurationfindLaunchConfiguration(ProcessItemfile,Stringmode)...{
ILaunchConfigurationconfiguration
=null;
ListcandidateConfigs
=Collections.EMPTY_LIST;
try...{
ILaunchConfiguration[]configs
=DebugPlugin.getDefault().getLaunchManager().getLaunchConfigurations();
candidateConfigs
=newArrayList(configs.length);
for(inti=0;i<configs.length;i++)...{
ILaunchConfigurationconfig
=configs[i];
StringprojectName
=config.getAttribute(JOB_NAME,(String)null);
if(projectName==null)...{
continue;
}

//StringprogramFile=config.getAttribute(PerlLaunchConfigurationConstants.ATTR_STARTUP_FILE,(String)
//null);
//Stringname=bin.getName();
if(file.getProperty().getLabel().equals(projectName))...{
candidateConfigs.add(config);
}

}

}
catch(CoreExceptione)...{
ExceptionHandler.process(e);
}


intcandidateCount=candidateConfigs.size();
if(candidateCount<1)...{
configuration
=createConfiguration(file);
}
else...{
configuration
=(ILaunchConfiguration)candidateConfigs.get(0);
}

returnconfiguration;
}


/***//**
*Createsanewconfigurationassociatedwiththegivenfile.
*
*
@paramfile
*
@returnILaunchConfiguration
*/

privateILaunchConfigurationcreateConfiguration(ProcessItemfile)...{
ILaunchConfigurationconfig
=null;
StringprojectName
=file.getProperty().getLabel();
ILaunchConfigurationTypetype
=getLaunchManager().getLaunchConfigurationType(JOB_DEBUG_LAUNCH_CONFIGURATION_TYPE);

try...{
if(type!=null)...{
ILaunchConfigurationWorkingCopywc
=type.newInstance(null,getLaunchManager()
.generateUniqueLaunchConfigurationNameFrom(projectName));
wc.setAttribute(JOB_NAME,projectName);
//wc.setAttribute(PerlLaunchConfigurationConstants.ATTR_PROJECT_NAME,file.getProject().getName());
//wc.setAttribute(PerlLaunchConfigurationConstants.ATTR_WORKING_DIRECTORY,(String)null);
config=wc.doSave();
}

}
catch(CoreExceptione)...{
ExceptionHandler.process(e);
}

returnconfig;
}


/***//**
*MethodtogettheLaunchManager
*
*
@returnILaunchManager
*/

protectedILaunchManagergetLaunchManager()...{
returnDebugPlugin.getDefault().getLaunchManager();
}


}

本例中的程序位于talend项目中的"org.talend.designer.core"插件中。使用svn链接

P.S. 该功能的eclipse源码在插件"org.eclipse.debug.ui" 中,可以参考的类:

JavaLaunchShortcut, AbstractLaunchToolbarAction。


http://talendforge.org/svn/tos 

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