Java Code Examples for org.apache.ratis.util.JavaUtils#cast()

/**
 * Load the state of the state machine from the storage.
 *
 * @param snapshot to load
 * @return the index of the snapshot or -1 if snapshot is invalid
 * @throws IOException if any error happens during read from storage
 */
private long load(SingleFileSnapshotInfo snapshot) throws IOException {
  //check the snapshot nullity
  if (snapshot == null) {
    LOG.warn("The snapshot info is null.");
    return RaftLog.INVALID_LOG_INDEX;
  }

  //check the existance of the snapshot file
  final File snapshotFile = snapshot.getFile().getPath().toFile();
  if (!snapshotFile.exists()) {
    LOG.warn("The snapshot file {} does not exist for snapshot {}",
        snapshotFile, snapshot);
    return RaftLog.INVALID_LOG_INDEX;
  }

  //load the TermIndex object for the snapshot using the file name pattern of
  // the snapshot
  final TermIndex last =
      SimpleStateMachineStorage.getTermIndexFromSnapshotFile(snapshotFile);

  //read the file and cast it to the AtomicInteger and set the counter
  try (ObjectInputStream in = new ObjectInputStream(
      new BufferedInputStream(new FileInputStream(snapshotFile)))) {
    //set the last applied termIndex to the termIndex of the snapshot
    setLastAppliedTermIndex(last);

    //read, cast and set the counter
    counter = JavaUtils.cast(in.readObject());
  } catch (ClassNotFoundException e) {
    throw new IllegalStateException(e);
  }

  return last.getIndex();
}
 

/** If this reply has {@link AlreadyClosedException}, return it; otherwise return null. */
public AlreadyClosedException getAlreadyClosedException() {
  return JavaUtils.cast(exception, AlreadyClosedException.class);
}
 

/** If this reply has {@link NotLeaderException}, return it; otherwise return null. */
public NotLeaderException getNotLeaderException() {
  return JavaUtils.cast(exception, NotLeaderException.class);
}
 

/** If this reply has {@link NotReplicatedException}, return it; otherwise return null. */
public NotReplicatedException getNotReplicatedException() {
  return JavaUtils.cast(exception, NotReplicatedException.class);
}
 

/** If this reply has {@link StateMachineException}, return it; otherwise return null. */
public StateMachineException getStateMachineException() {
  return JavaUtils.cast(exception, StateMachineException.class);
}
 

public LeaderNotReadyException getLeaderNotReadyException() {
  return JavaUtils.cast(exception, LeaderNotReadyException.class);
}
 

Factory(Parameters parameters) {
  serverRequestReply = JavaUtils.cast(parameters.getNonNull(SERVER_REQUEST_REPLY_KEY, SimulatedRequestReply.class));
  client2serverRequestReply = parameters.getNonNull(
      CLIENT_TO_SERVER_REQUEST_REPLY_KEY, SimulatedClientRpc.class);
}
 

/** If this reply has {@link NotLeaderException}, return it; otherwise return null. */
public NotLeaderException getNotLeaderException() {
  return JavaUtils.cast(exception, NotLeaderException.class);
}
 

/** If this reply has {@link NotReplicatedException}, return it; otherwise return null. */
public NotReplicatedException getNotReplicatedException() {
  return JavaUtils.cast(exception, NotReplicatedException.class);
}
 

/** If this reply has {@link StateMachineException}, return it; otherwise return null. */
public StateMachineException getStateMachineException() {
  return JavaUtils.cast(exception, StateMachineException.class);
}
 

/** If this reply has {@link RaftRetryFailureException}, return it; otherwise return null. */
public RaftRetryFailureException getRetryFailureException() {
  return JavaUtils.cast(exception, RaftRetryFailureException.class);
}
 

Factory(Parameters parameters) {
  serverRequestReply = JavaUtils.cast(parameters.getNonNull(SERVER_REQUEST_REPLY_KEY, SimulatedRequestReply.class));
  client2serverRequestReply = parameters.getNonNull(
      CLIENT_TO_SERVER_REQUEST_REPLY_KEY, SimulatedClientRpc.class);
}