There is an article in the Eclipse wiki how to configure user's p2 default repositories of an RCP application by adding a static conf file to your product:
Equinox/p2/Adding Self-Update to an RCP Application - Configuring the user's default repositories
I want to do the same programmatically in a Java class when the user changes some configuration details. I could not find appropriate p2 API documentation for that.
I found a solution. It's easy - unfortunately there is no documentation...
// from bundle org.eclipse.equinox.p2.console
import org.eclipse.equinox.internal.p2.console.ProvisioningHelper;
URI repoUri = new URI(UPDATE_SITE_URL);
try {
ProvisioningHelper.addMetadataRepository(repoUri);
} catch( Exception e ) {
LOG.warn("Can not add update repository: " + repoUri);
}
try {
ProvisioningHelper.addArtifactRepository(repoUri);
} catch( Exception e ) {
LOG.warn("Can not add update repository: " + repoUri);
}