如何安全地使用Eclipse p2配置文件？

Question

I encounter some problems when I try to update Eclipse plug-ins at the start up of Eclipse. My program pops up the dialog at Help -> Check for Updates at the start up of Eclipse. But, when the user proceeds with the update quickly, Eclipse throws an exception saying that the p2 profile is in use. I believe this is because other Eclipse jobs are using the p2 profile at the start up and thus my program fails to use the p2 profile to update the plug-ins. How can I safely use the p2 profile? How can I use the p2 profile in isolation?

I've uploaded the minimal piece of code that is needed to reproduce the problem on github . And, I've described the problem and the steps to reproduce it in details in an issue on the github repository .

Answer 1

You can get the ProvisioningJob from your UpdateOperation , let it belongs to the family of running profile change job. See org.eclipse.core.runtime.jobs.Job.belongsTo(Object) .

Besides I have two ideas to do it via using internal API,

1. try to test lock the profile to see whether it's being changed. org.eclipse.equinox.internal.p2.engine.SimpleProfileRegistry.lockProfile(Profile)
2. run your like before, but catch IlegalStateException, then register a ProvisioningListener on the IProvisioningEventBus to be notified when the running profilechangeoperation is finished.

Answer 2

My commit opens the "Check for Updates" dialog by invoking the command "org.eclipse.equinox.p2.ui.sdk.update" instead of invoking the following method.

org.eclipse.equinox.p2.ui.ProvisioningUI.openUpdateWizard(boolean, UpdateOperation, LoadMetadataRepositoryJob)

Surprisingly, this change seems to fix the issue with the race condition in accessing the p2 profile. Does anyone have an explanation for how my commit removes the race condition?