Examples with PersistentGlobalState com.yelp.nrtsearch.server.luceneserver.state.PersistentGlobalState used on opensource projects

Example 11 with PersistentGlobalState

use of com.yelp.nrtsearch.server.luceneserver.state.PersistentGlobalState in project nrtsearch by Yelp.

the class RemoteStateBackend method loadOrCreateGlobalState.

@Override
public PersistentGlobalState loadOrCreateGlobalState() throws IOException {
    logger.info("Loading remote state");
    Path downloadedPath = archiver.download(globalState.getConfiguration().getServiceName(), GLOBAL_STATE_RESOURCE);
    if (downloadedPath == null) {
        PersistentGlobalState state = new PersistentGlobalState();
        logger.info("Remote state not present, initializing default");
        commitGlobalState(state);
        return state;
    } else {
        Path downloadedStateFilePath = downloadedPath.resolve(GLOBAL_STATE_FOLDER).resolve(GLOBAL_STATE_FILE);
        if (!downloadedStateFilePath.toFile().exists()) {
            throw new IllegalStateException("No state file present in downloaded directory");
        }
        // copy restored state to local state directory, not strictly required but ensures a
        // current copy of the state is always in the local directory
        Files.copy(downloadedStateFilePath, localFilePath.resolve(GLOBAL_STATE_FILE), StandardCopyOption.REPLACE_EXISTING);
        PersistentGlobalState persistentGlobalState = StateUtils.readStateFromFile(downloadedStateFilePath);
        logger.info("Loaded remote state: " + MAPPER.writeValueAsString(persistentGlobalState));
        return persistentGlobalState;
    }
}