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How to know if an InstallableUnit is already installed? [message #837203]

Thu, 05 April 2012 11:44

Jean-Philippe Schneider

Messages: 4
Registered: January 2012

Junior Member

Hello,

I'm writing an Eclipse plugin that have to check if some feature is installed or not.

I already found how to install this feature from my plugin but I don't find how to know if it is already installed.

Any idea?

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Re: How to know if an InstallableUnit is already installed? [message #837213 is a reply to message #837203]

Thu, 05 April 2012 11:57

Pascal Rapicault

Messages: 333
Registered: July 2009
Location: Ottawa

Senior Member

Use the following snippet.

private IProvisioningAgent getAgent() {
Collection<ServiceReference<IProvisioningAgent>> ref = null;
try {
ref = Activator.getContext().getServiceReferences(IProvisioningAgent.class, '(' + IProvisioningAgent.SERVICE_CURRENT + '=' + Boolean.TRUE.toString() + ')');
} catch (InvalidSyntaxException e) {
//ignore can't happen since we write the filter ourselves
}
if (ref == null || ref.size() == 0)
throw new IllegalStateException("no agent");
IProvisioningAgent agent = Activator.getContext().getService(ref.iterator().next());
Activator.getContext().ungetService(ref.iterator().next());
return agent;
}

public void getFeature() {
IProfileRegistry registry = (IProfileRegistry) getAgent().getService(IProfileRegistry.SERVICE_NAME);
IProfile profile = registry.getProfile(IProfileRegistry.SELF);
result = profile.query(QueryUtil.createIUQuery("my.feature"), new NullProgressMonitor()); //Note that the feature id are usually suffixed by feature.group. so ide would be called ide.feature.group
}

Note though that while running the app from within eclipse you will not get a profile unless you select the "support software installation [...]" option in the configuration tab of the launch configuration and even that is only so precise since for example features won't be there.
The best way to try this out is to use export the plugin and try it on your running eclipse.

Pascal
=-=-=
Consulting, training, bug fixing - pascal at rapicault dot net

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