public List<IServerExtension> getExtensions(IProgressMonitor monitor)
throws CoreException, ProvisionException {
try {
/*
* To discovery the server adapter, there are three methods:
* 1. Looking at the site.xml (if it exists). This is the legacy method
* 2. Looking for the org.eclipse.wst.server.core.serverAdapter property in a p2
* update site (that may not have a site.xml). The property is necessary to identify
* the InstallableUnit as a server type. Otherwise, all the InstallableUnits will show
* up regardless of whether it is a server or not
* 3. If the user created the p2 update site using a category.xml file (migrating old site.xml
* to use category.xml)
*/
BundleContext bd =
org.eclipse.wst.server.discovery.internal.Activator.getDefault()
.getBundle()
.getBundleContext();
IProvisioningAgent agent = ExtensionUtility.getAgent(bd);
URI url2 = new URI(url);
// Method 1: Looking at the site.xml
UpdateSiteMetadataRepositoryFactory mrf = new UpdateSiteMetadataRepositoryFactory();
mrf.setAgent(ExtensionUtility.getAgent(bd));
// If the site.xml does not exist, the load will throw a
// org.eclipse.equinox.p2.core.ProvisionException
List<IServerExtension> list = new ArrayList<IServerExtension>();
try {
IMetadataRepository repo = mrf.load(url2, IRepositoryManager.REPOSITORIES_ALL, monitor);
IQuery<IInstallableUnit> query =
QueryUtil.createMatchQuery(
"id ~=/*org.eclipse.wst.server.core.serverAdapter/"); //$NON-NLS-1$
list = getInstallableUnits(repo, query, url2, monitor);
} catch (ProvisionException pe) {
Trace.trace(Trace.WARNING, "Error getting update site information", pe); // $NON-NLS-1$
}
// Call Method 2 if there are no results from Method 1 (e.g. if the site.xml exists without
// specifying any server adapters there or no site.xml exists)
if (list.isEmpty()) {
IMetadataRepositoryManager manager =
(IMetadataRepositoryManager) agent.getService(IMetadataRepositoryManager.SERVICE_NAME);
manager.addRepository(url2);
// Need to query for all IUs
IQuery<IInstallableUnit> query = QueryUtil.createIUAnyQuery();
IMetadataRepository repo = manager.loadRepository(url2, monitor);
List<IServerExtension> list2 = getInstallableUnits(repo, query, url2, monitor);
int size = list2.size();
for (int i = 0; i < size; i++) {
Extension e = (Extension) list2.get(i);
IInstallableUnit[] iuArr = e.getIUs();
if (iuArr != null && iuArr.length > 0) {
if (iuArr[0] != null) {
if (iuArr[0].getProperty(SERVER_ADAPTER_ID) != null) {
list.add(e);
}
}
}
}
}
// Call Method 3 if no results from Method 2. Creating the p2 update site using the
// category.xml will generate
// a provider property with org.eclipse.wst.server.core.serverAdapter
if (list.isEmpty()) {
IMetadataRepositoryManager manager =
(IMetadataRepositoryManager) agent.getService(IMetadataRepositoryManager.SERVICE_NAME);
manager.addRepository(url2);
IQuery<IInstallableUnit> query =
QueryUtil.createMatchQuery(
"id ~=/*org.eclipse.wst.server.core.serverAdapter/"); //$NON-NLS-1$
IMetadataRepository repo = manager.loadRepository(url2, monitor);
list = getInstallableUnits(repo, query, url2, monitor);
}
return list;
} catch (ProvisionException e) {
Trace.trace(Trace.WARNING, "Error getting update info", e); // $NON-NLS-1$
throw e;
} catch (Exception e) {
Trace.trace(Trace.WARNING, "Error getting update info", e); // $NON-NLS-1$
return new ArrayList<IServerExtension>(0);
}
}
