Examples with AsyncLogWriter com.twitter.distributedlog.AsyncLogWriter used on opensource projects

Example 6 with AsyncLogWriter

use of com.twitter.distributedlog.AsyncLogWriter in project distributedlog by twitter.

the class StreamImpl method handleRecoverableDLException.

/**
     * Handle recoverable dl exception.
     *
     * @param op
     *          stream operation executing
     * @param cause
     *          exception received when executing <i>op</i>
     */
private void handleRecoverableDLException(StreamOp op, final Throwable cause) {
    AsyncLogWriter oldWriter = null;
    boolean statusChanged = false;
    synchronized (this) {
        if (StreamStatus.INITIALIZED == status) {
            oldWriter = setStreamStatus(StreamStatus.FAILED, StreamStatus.INITIALIZED, null, null, cause);
            statusChanged = true;
        }
    }
    if (statusChanged) {
        Abortables.asyncAbort(oldWriter, false);
        logger.error("Failed to write data into stream {} : ", name, cause);
        scheduleTryAcquireOnce(0L);
    }
    op.fail(cause);
}

Example 7 with AsyncLogWriter

use of com.twitter.distributedlog.AsyncLogWriter in project distributedlog by twitter.

the class StreamImpl method handleUnknownException.

/**
     * Handle unknown exception when executing <i>op</i>.
     *
     * @param op
     *          stream operation executing
     * @param cause
     *          exception received when executing <i>op</i>
     */
private void handleUnknownException(StreamOp op, final Throwable cause) {
    AsyncLogWriter oldWriter = null;
    boolean statusChanged = false;
    synchronized (this) {
        if (StreamStatus.INITIALIZED == status) {
            oldWriter = setStreamStatus(StreamStatus.FAILED, StreamStatus.INITIALIZED, null, null, cause);
            statusChanged = true;
        }
    }
    if (statusChanged) {
        Abortables.asyncAbort(oldWriter, false);
        logger.error("Failed to write data into stream {} : ", name, cause);
        scheduleTryAcquireOnce(0L);
    }
    op.fail(cause);
}

Example 8 with AsyncLogWriter

use of com.twitter.distributedlog.AsyncLogWriter in project distributedlog by twitter.

the class StreamImpl method setStreamStatus.

/**
     * Update the stream status. The changes are only applied when there isn't status changed.
     *
     * @param newStatus
     *          new status
     * @param oldStatus
     *          old status
     * @param writer
     *          new log writer
     * @param owner
     *          new owner
     * @param t
     *          new exception
     * @return old writer if it exists
     */
synchronized AsyncLogWriter setStreamStatus(StreamStatus newStatus, StreamStatus oldStatus, AsyncLogWriter writer, String owner, Throwable t) {
    if (oldStatus != this.status) {
        logger.info("Stream {} status already changed from {} -> {} when trying to change it to {}", new Object[] { name, oldStatus, this.status, newStatus });
        return null;
    }
    AsyncLogWriter oldWriter = this.writer;
    this.writer = writer;
    if (null != owner && owner.equals(clientId)) {
        unexpectedExceptions.inc();
        logger.error("I am waiting myself {} to release lock on stream {}, so have to shut myself down :", new Object[] { owner, name, t });
        // I lost the ownership but left a lock over zookeeper
        // I should not ask client to redirect to myself again as I can't handle it :(
        // shutdown myself
        fatalErrorHandler.notifyFatalError();
        this.owner = null;
    } else {
        this.owner = owner;
    }
    this.lastException = t;
    this.status = newStatus;
    if (StreamStatus.BACKOFF == newStatus && null != owner) {
        // start failure watch
        this.lastAcquireFailureWatch.reset().start();
    }
    if (StreamStatus.INITIALIZED == newStatus) {
        streamManager.notifyAcquired(this);
        logger.info("Inserted acquired stream {} -> writer {}", name, this);
    } else {
        streamManager.notifyReleased(this);
        logger.info("Removed acquired stream {} -> writer {}", name, this);
    }
    return oldWriter;
}

Example 9 with AsyncLogWriter

use of com.twitter.distributedlog.AsyncLogWriter in project distributedlog by twitter.

the class StreamImpl method handleOwnershipAcquireFailedException.

/**
     * Handle losing ownership during executing <i>op</i>.
     *
     * @param op
     *          stream operation executing
     * @param oafe
     *          the ownership exception received when executing <i>op</i>
     */
private void handleOwnershipAcquireFailedException(StreamOp op, final OwnershipAcquireFailedException oafe) {
    logger.warn("Failed to write data into stream {} because stream is acquired by {} : {}", new Object[] { name, oafe.getCurrentOwner(), oafe.getMessage() });
    AsyncLogWriter oldWriter = null;
    boolean statusChanged = false;
    synchronized (this) {
        if (StreamStatus.INITIALIZED == status) {
            oldWriter = setStreamStatus(StreamStatus.BACKOFF, StreamStatus.INITIALIZED, null, oafe.getCurrentOwner(), oafe);
            statusChanged = true;
        }
    }
    if (statusChanged) {
        Abortables.asyncAbort(oldWriter, false);
        scheduleTryAcquireOnce(nextAcquireWaitTimeMs);
    }
    op.fail(oafe);
}