java – Eclipse插件：启动后立即运行代码

错误看起来像这样：

!MESSAGE While loading class "de.stefansurkamp.package.ClassIWantToLoad",thread "Thread[main,6,main]" timed out waiting (5006ms) for thread "Thread[Worker-2,5,main]" to finish starting bundle "MyPlugin_1.0.0.qualifier [302]". To avoid deadlock,main]" is proceeding but "de.stefansurkamp.package.ClassIWantToLoad" may not be fully initialized.
!STACK 0
org.osgi.framework.BundleException: State change in progress for bundle "reference:file:/C:/Users/Stefan/workspace/MyPlugin/" by thread "Worker-2".
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.beginStateChange(AbstractBundle.java:1088)
    at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:298)
    at org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:478)
    at org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:263)
    at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:109)
    [...]
Caused by: org.eclipse.osgi.framework.internal.core.AbstractBundle$BundleStatusException
    ... 53 more
Root exception:
org.eclipse.osgi.framework.internal.core.AbstractBundle$BundleStatusException
    [...]

如果需要,我可以提供完整的堆栈跟踪.

那么有没有任何方法在start()完成后立即运行？

编辑：使用作业和org.eclipse.ui.startup

根据greg的建议,我在一个由org.eclipse.ui.startup扩展点加载的类中创建了一个Job.

这就是我的earlyStartup()方法的样子：

@Override
public void earlyStartup() {        
    Job clearPrefsJob = new Job("clearPrefsJob") {

        @Override
        protected IStatus run(IProgressMonitor monitor) {
            try {
                DataStorage dataStorage = new DataStorage();
                dataStorage.clearPrefs();
                System.out.println("Everything gone.");
            }
            catch (StorageException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return null;
        }

    };

    clearPrefsJob.addJobChangeListener(new IJobChangeListener() {
        (All of the IchangeEvents here)
    });

    clearPrefsJob.setPriority(Job.BUILD);
    clearPrefsJob.schedule();

我的控制台打印一切都没了.和我正在完成的工作的调试消息(由作业更改侦听器).

但就在那之后我收到一条错误消息：

!ENTRY org.eclipse.core.jobs 4 2 2014-07-29 11:53:12.481
!MESSAGE An internal error occurred during: "clearPrefsJob".
!STACK 0
java.lang.NullPointerException
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:69)

此外,我的测试环境显示以下错误消息：

'clearPrefsJob' has encountered a problem.
   An internal error occured during: "clearPrefsJob".
   java.lang.NullPointerException

我不知道代码的这一部分中的NullPointerException应该来自哪里,因为在使用作业之前一切正常.

解：

看起来问题是使用return null.当使用返回Status.OK_STATUS(或类似)时,一切都很顺利.