Examples with ManyToOneRingBuffer org.agrona.concurrent.ringbuffer.ManyToOneRingBuffer used on opensource projects

Example 6 with ManyToOneRingBuffer

use of org.agrona.concurrent.ringbuffer.ManyToOneRingBuffer in project Aeron by real-logic.

the class DriverEventLogger method logFlowControlReceiver.

/**
 * Log the information about receiver for the corresponding flow control event.
 *
 * @param code          flow control event type.
 * @param receiverId    of the receiver.
 * @param sessionId     of the image.
 * @param streamId      of the image.
 * @param channel       uri of the channel.
 * @param receiverCount number of the receivers after the event.
 */
public void logFlowControlReceiver(final DriverEventCode code, final long receiverId, final int sessionId, final int streamId, final String channel, final int receiverCount) {
    final int length = SIZE_OF_INT * 4 + SIZE_OF_LONG + channel.length();
    final int captureLength = captureLength(length);
    final int encodedLength = encodedLength(captureLength);
    final ManyToOneRingBuffer ringBuffer = this.ringBuffer;
    final int index = ringBuffer.tryClaim(toEventCodeId(code), encodedLength);
    if (index > 0) {
        try {
            encodeFlowControlReceiver((UnsafeBuffer) ringBuffer.buffer(), index, captureLength, length, receiverId, sessionId, streamId, channel, receiverCount);
        } finally {
            ringBuffer.commit(index);
        }
    }
}

Example 7 with ManyToOneRingBuffer

use of org.agrona.concurrent.ringbuffer.ManyToOneRingBuffer in project Aeron by real-logic.

the class ClusterEventLogger method logNewLeadershipTerm.

/**
 * Log a new leadership term event.
 *
 * @param logLeadershipTermId     term for which log entries are present.
 * @param nextLeadershipTermId    next term relative to the logLeadershipTermId
 * @param nextTermBaseLogPosition base log position for the next term.
 * @param nextLogPosition         committed log position for next term.
 * @param leadershipTermId        new leadership term id.
 * @param termBaseLogPosition     position the log reached at base of new term.
 * @param logPosition             position the log reached for the new term.
 * @param leaderRecordingId       of the log in the leader archive.
 * @param timestamp               of the new term.
 * @param leaderMemberId          member id for the new leader.
 * @param logSessionId            session id of the log extension.
 * @param isStartup               is the leader starting up fresh.
 */
public void logNewLeadershipTerm(final long logLeadershipTermId, final long nextLeadershipTermId, final long nextTermBaseLogPosition, final long nextLogPosition, final long leadershipTermId, final long termBaseLogPosition, final long logPosition, final long leaderRecordingId, final long timestamp, final int leaderMemberId, final int logSessionId, final boolean isStartup) {
    final int length = newLeaderShipTermLength();
    final int captureLength = captureLength(length);
    final int encodedLength = encodedLength(captureLength);
    final ManyToOneRingBuffer ringBuffer = this.ringBuffer;
    final int index = ringBuffer.tryClaim(NEW_LEADERSHIP_TERM.toEventCodeId(), encodedLength);
    if (index > 0) {
        try {
            encodeNewLeadershipTerm((UnsafeBuffer) ringBuffer.buffer(), index, captureLength, length, logLeadershipTermId, nextLeadershipTermId, nextTermBaseLogPosition, nextLogPosition, leadershipTermId, termBaseLogPosition, logPosition, leaderRecordingId, timestamp, leaderMemberId, logSessionId, isStartup);
        } finally {
            ringBuffer.commit(index);
        }
    }
}

Example 8 with ManyToOneRingBuffer

use of org.agrona.concurrent.ringbuffer.ManyToOneRingBuffer in project Aeron by real-logic.

the class CommonContext method requestDriverTermination.

/**
 * Request a driver to run its termination hook.
 *
 * @param directory   for the driver.
 * @param tokenBuffer containing the optional token for the request.
 * @param tokenOffset within the tokenBuffer at which the token begins.
 * @param tokenLength of the token in the tokenBuffer.
 * @return true if request was sent or false if request could not be sent.
 */
public static boolean requestDriverTermination(final File directory, final DirectBuffer tokenBuffer, final int tokenOffset, final int tokenLength) {
    final File cncFile = new File(directory, CncFileDescriptor.CNC_FILE);
    if (cncFile.exists() && cncFile.length() > 0) {
        final MappedByteBuffer cncByteBuffer = IoUtil.mapExistingFile(cncFile, "CnC file");
        try {
            final UnsafeBuffer cncMetaDataBuffer = CncFileDescriptor.createMetaDataBuffer(cncByteBuffer);
            final int cncVersion = cncMetaDataBuffer.getIntVolatile(cncVersionOffset(0));
            CncFileDescriptor.checkVersion(cncVersion);
            final ManyToOneRingBuffer toDriverBuffer = new ManyToOneRingBuffer(CncFileDescriptor.createToDriverBuffer(cncByteBuffer, cncMetaDataBuffer));
            final long clientId = toDriverBuffer.nextCorrelationId();
            final DriverProxy driverProxy = new DriverProxy(toDriverBuffer, clientId);
            return driverProxy.terminateDriver(tokenBuffer, tokenOffset, tokenLength);
        } finally {
            BufferUtil.free(cncByteBuffer);
        }
    }
    return false;
}

Example 9 with ManyToOneRingBuffer

use of org.agrona.concurrent.ringbuffer.ManyToOneRingBuffer in project Aeron by real-logic.

the class CommonContext method isDriverActive.

/**
 * Is a media driver active in the current mapped CnC buffer? If the driver is starting then it will wait for
 * up to the driverTimeoutMs by checking for the cncVersion being set.
 *
 * @param driverTimeoutMs for the driver liveness check.
 * @param logger          for feedback as liveness checked.
 * @param cncByteBuffer   for the existing CnC file.
 * @return true if a driver is active or false if not.
 */
public static boolean isDriverActive(final long driverTimeoutMs, final Consumer<String> logger, final ByteBuffer cncByteBuffer) {
    if (null == cncByteBuffer) {
        return false;
    }
    final UnsafeBuffer cncMetaDataBuffer = CncFileDescriptor.createMetaDataBuffer(cncByteBuffer);
    final long startTimeMs = System.currentTimeMillis();
    int cncVersion;
    while (0 == (cncVersion = cncMetaDataBuffer.getIntVolatile(CncFileDescriptor.cncVersionOffset(0)))) {
        if (System.currentTimeMillis() > (startTimeMs + driverTimeoutMs)) {
            throw new DriverTimeoutException("CnC file is created but not initialised.");
        }
        sleep(1);
    }
    CncFileDescriptor.checkVersion(cncVersion);
    final ManyToOneRingBuffer toDriverBuffer = new ManyToOneRingBuffer(CncFileDescriptor.createToDriverBuffer(cncByteBuffer, cncMetaDataBuffer));
    final long timestampMs = toDriverBuffer.consumerHeartbeatTime();
    final long nowMs = System.currentTimeMillis();
    final long timestampAgeMs = nowMs - timestampMs;
    logger.accept("INFO: Aeron toDriver consumer heartbeat is (ms): " + timestampAgeMs);
    return timestampAgeMs <= driverTimeoutMs;
}

Example 10 with ManyToOneRingBuffer

use of org.agrona.concurrent.ringbuffer.ManyToOneRingBuffer in project Aeron by real-logic.

the class DriverTool method main.

/**
 * Main method for launching the process.
 *
 * @param args passed to the process.
 */
public static void main(final String[] args) {
    boolean printPidOnly = false;
    boolean terminateDriver = false;
    if (0 != args.length) {
        checkForHelp(args);
        if (args[0].equals("pid")) {
            printPidOnly = true;
        } else if (args[0].equals("terminate")) {
            terminateDriver = true;
        }
    }
    final File cncFile = CommonContext.newDefaultCncFile();
    final MappedByteBuffer cncByteBuffer = IoUtil.mapExistingFile(cncFile, "cnc");
    final DirectBuffer cncMetaData = createMetaDataBuffer(cncByteBuffer);
    final int cncVersion = cncMetaData.getInt(cncVersionOffset(0));
    checkVersion(cncVersion);
    final ManyToOneRingBuffer toDriver = new ManyToOneRingBuffer(createToDriverBuffer(cncByteBuffer, cncMetaData));
    if (printPidOnly) {
        System.out.println(pid(cncMetaData));
    } else if (terminateDriver) {
        final DriverProxy driverProxy = new DriverProxy(toDriver, toDriver.nextCorrelationId());
        if (!driverProxy.terminateDriver(null, 0, 0)) {
            throw new AeronException("could not send termination request.");
        }
    } else {
        System.out.println("Command `n Control file: " + cncFile);
        System.out.format("Version: %d, PID: %d%n", cncVersion, pid(cncMetaData));
        printDateActivityAndStartTimestamps(startTimestampMs(cncMetaData), toDriver.consumerHeartbeatTime());
    }
}