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。

类 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, 在2个launch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