/**
* Fetches a single change package fragment.
*
* @param sessionId the {@link SessionId} representing the requesting user
* @param proxyId the ID that identifies the list of stored fragments
* @param fragmentIndex allows to request different change package fragments
* @return a {@link ChangePackageEnvelope} containing the change package fragment
* @throws ESException in case the mandatory session adapter is missing
*/
@ESMethod(MethodId.DOWNLOADCHANGEPACKAGEFRAGMENT)
public ChangePackageEnvelope downloadChangePackageFragment(
SessionId sessionId, String proxyId, int fragmentIndex) throws ESException {
final ESSessionId resolvedSession =
getAccessControl().getSessions().resolveSessionById(sessionId.getId());
final SessionId session = APIUtil.toInternal(SessionId.class, resolvedSession);
final Optional<ChangePackageFragmentProviderAdapter> maybeAdapter =
ESCollections.find(session.eAdapters(), ChangePackageFragmentProviderAdapter.class);
if (!maybeAdapter.isPresent()) {
throw new ESException(
Messages.VersionSubInterfaceImpl_ChangePackageFragmentProviderAdapterMissing + sessionId);
}
final ChangePackageFragmentProviderAdapter adapter = maybeAdapter.get();
final ChangePackageEnvelope envelope =
VersioningFactory.eINSTANCE.createChangePackageEnvelope();
final List<String> fragment = adapter.getFragment(proxyId, fragmentIndex);
envelope.getFragment().addAll(fragment);
envelope.setFragmentCount(adapter.getFragmentSize(proxyId));
envelope.setFragmentIndex(fragmentIndex);
if (envelope.isLast()) {
adapter.markAsConsumed(proxyId);
}
return envelope;
}
/**
* Given a {@link ChangePackageEnvelope} which contains a change package fragment, stores one or
* more fragments by attaching them to a session specific adapter.
*
* @param sessionId the {@link SessionId} belonging to the calling user
* @param projectId the {@link ProjectId}
* @param envelope the {@link ChangePackageEnvelope} containing the fragment
* @return an ID identifying the stored fragment(s)
* @throws ESException in case the fragment couldn't be stored
*/
@ESMethod(MethodId.UPLOADCHANGEPACKAGEFRAGMENT)
public String uploadChangePackageFragment(
SessionId sessionId, ProjectId projectId, ChangePackageEnvelope envelope) throws ESException {
final String proxyId = generateProxyId(projectId.getId());
final ESSessionId resolvedSession =
getAccessControl().getSessions().resolveSessionById(sessionId.getId());
if (resolvedSession == null) {
throw new ESException(
MessageFormat.format(Messages.VersionSubInterfaceImpl_0, sessionId.getId()));
}
final SessionId session = APIUtil.toInternal(SessionId.class, resolvedSession);
final Optional<ChangePackageFragmentUploadAdapter> maybeAdapter =
ESCollections.find(session.eAdapters(), ChangePackageFragmentUploadAdapter.class);
ChangePackageFragmentUploadAdapter adapter;
if (!maybeAdapter.isPresent()) {
adapter = new ChangePackageFragmentUploadAdapter();
session.eAdapters().add(adapter);
} else {
adapter = maybeAdapter.get();
}
adapter.addFragment(proxyId, envelope.getFragment());
if (envelope.isLast()) {
adapter.markAsComplete(proxyId);
}
return proxyId;
}