public Synchronizer getConfiguredSynchronizer(GlobalSession session)
throws NoCollectionKeysSetException, URISyntaxException, NonObjectJSONException, IOException,
ParseException {
Repository remote = wrappedServerRepo();
Synchronizer synchronizer = new ServerLocalSynchronizer();
synchronizer.repositoryA = remote;
synchronizer.repositoryB = this.getLocalRepository();
synchronizer.load(getConfig());
return synchronizer;
}
/**
* We synced this engine! Persist timestamps and advance the session.
*
* @param synchronizer the <code>Synchronizer</code> that succeeded.
*/
@Override
public void onSynchronized(Synchronizer synchronizer) {
Logger.debug(LOG_TAG, "onSynchronized.");
SynchronizerConfiguration newConfig = synchronizer.save();
if (newConfig != null) {
persistConfig(newConfig);
} else {
Logger.warn(LOG_TAG, "Didn't get configuration from synchronizer after success.");
}
Logger.info(LOG_TAG, "Advancing session.");
session.advance();
}
@Override
public void execute() throws NoSuchStageException {
final String name = getEngineName();
Logger.debug(LOG_TAG, "Starting execute for " + name);
try {
if (!this.isEnabled()) {
Logger.info(LOG_TAG, "Skipping stage " + name + ".");
session.advance();
return;
}
} catch (MetaGlobalException.MetaGlobalMalformedSyncIDException e) {
// Bad engine syncID. This should never happen. Wipe the server.
try {
session.updateMetaGlobalWith(
name, new EngineSettings(Utils.generateGuid(), this.getStorageVersion()));
Logger.info(
LOG_TAG, "Wiping server because malformed engine sync ID was found in meta/global.");
wipeServer();
Logger.info(LOG_TAG, "Wiped server after malformed engine sync ID found in meta/global.");
} catch (Exception ex) {
session.abort(
ex, "Failed to wipe server after malformed engine sync ID found in meta/global.");
}
} catch (MetaGlobalException.MetaGlobalMalformedVersionException e) {
// Bad engine version. This should never happen. Wipe the server.
try {
session.updateMetaGlobalWith(
name, new EngineSettings(Utils.generateGuid(), this.getStorageVersion()));
Logger.info(
LOG_TAG, "Wiping server because malformed engine version was found in meta/global.");
wipeServer();
Logger.info(LOG_TAG, "Wiped server after malformed engine version found in meta/global.");
} catch (Exception ex) {
session.abort(
ex, "Failed to wipe server after malformed engine version found in meta/global.");
}
} catch (MetaGlobalException.MetaGlobalStaleClientSyncIDException e) {
// Our syncID is wrong. Reset client and take the server syncID.
Logger.warn(
LOG_TAG,
"Remote engine syncID different from local engine syncID:"
+ " resetting local engine and assuming remote engine syncID.");
this.resetLocal(e.serverSyncID);
} catch (MetaGlobalException e) {
session.abort(e, "Inappropriate meta/global; refusing to execute " + name + " stage.");
return;
}
Synchronizer synchronizer;
try {
synchronizer = this.getConfiguredSynchronizer(session);
} catch (NoCollectionKeysSetException e) {
session.abort(e, "No CollectionKeys.");
return;
} catch (URISyntaxException e) {
session.abort(e, "Invalid URI syntax for server repository.");
return;
} catch (NonObjectJSONException e) {
session.abort(e, "Invalid persisted JSON for config.");
return;
} catch (IOException e) {
session.abort(e, "Invalid persisted JSON for config.");
return;
} catch (ParseException e) {
session.abort(e, "Invalid persisted JSON for config.");
return;
}
Logger.debug(LOG_TAG, "Invoking synchronizer.");
synchronizer.synchronize(session.getContext(), this);
Logger.debug(LOG_TAG, "Reached end of execute.");
}