Java Code Examples for org.agrona.MutableDirectBuffer#getInt()

/**
 * Append pre-formatted block of message fragments into the term buffer.
 * <p>
 * <em>WARNING: This is internal API used by {@code ExclusivePublication#offerBlock} method.</em>
 * </p>
 *
 * @param termId     for the current term.
 * @param termOffset in the term at which to append.
 * @param buffer     which contains block of messages.
 * @param offset     within the buffer at which the block begins.
 * @param length     of the block in bytes (always aligned).
 * @return the resulting offset of the term after success otherwise {@link #FAILED}.
 */
public int appendBlock(
    final int termId,
    final int termOffset,
    final MutableDirectBuffer buffer,
    final int offset,
    final int length)
{
    final int resultingOffset = termOffset + length;
    final int lengthOfFirstFrame = buffer.getInt(offset, LITTLE_ENDIAN);

    buffer.putInt(offset, 0, LITTLE_ENDIAN);
    termBuffer.putBytes(termOffset, buffer, offset, length);
    frameLengthOrdered(termBuffer, termOffset, lengthOfFirstFrame);
    putRawTailOrdered(termId, resultingOffset);

    return resultingOffset;
}
 

private void checkFirstFrame(final MutableDirectBuffer buffer, final int offset)
{
    final int frameType = HDR_TYPE_DATA;
    final int blockTermOffset = buffer.getInt(offset + TERM_OFFSET_FIELD_OFFSET, LITTLE_ENDIAN);
    final int blockSessionId = buffer.getInt(offset + SESSION_ID_FIELD_OFFSET, LITTLE_ENDIAN);
    final int blockStreamId = buffer.getInt(offset + STREAM_ID_FIELD_OFFSET, LITTLE_ENDIAN);
    final int blockTermId = buffer.getInt(offset + TERM_ID_FIELD_OFFSET, LITTLE_ENDIAN);
    final int blockFrameType = buffer.getShort(offset + TYPE_FIELD_OFFSET, LITTLE_ENDIAN) & 0xFFFF;

    if (blockTermOffset != termOffset ||
        blockSessionId != sessionId ||
        blockStreamId != streamId ||
        blockTermId != termId ||
        frameType != blockFrameType)
    {
        throw new IllegalArgumentException("improperly formatted block:" +
            " termOffset=" + blockTermOffset + " (expected=" + termOffset + ")," +
            " sessionId=" + blockSessionId + " (expected=" + sessionId + ")," +
            " streamId=" + blockStreamId + " (expected=" + streamId + ")," +
            " termId=" + blockTermId + " (expected=" + termId + ")," +
            " frameType=" + blockFrameType + " (expected=" + frameType + ")");
    }
}
 

static void dissectStateChange(
    final ClusterEventCode eventCode,
    final MutableDirectBuffer buffer,
    final int offset,
    final StringBuilder builder)
{
    int absoluteOffset = offset;
    absoluteOffset += dissectLogHeader(CONTEXT, eventCode, buffer, absoluteOffset, builder);

    final int memberId = buffer.getInt(absoluteOffset, LITTLE_ENDIAN);
    absoluteOffset += SIZE_OF_INT;

    builder.append(": memberId=").append(memberId);
    builder.append(", ");
    buffer.getStringAscii(absoluteOffset, builder);
}
 

public void onMessage(final int msgTypeId, final MutableDirectBuffer buffer, final int index, final int length)
{
    final int value = buffer.getInt(index);
    if (value >= 0)
    {
        final Queue<Integer> responseQueue = responseQueues[value];
        while (!responseQueue.offer(SENTINEL))
        {
            ThreadHints.onSpinWait();
        }
    }
}
 

static void dissectNewLeadershipTerm(
    final MutableDirectBuffer buffer, final int offset, final StringBuilder builder)
{
    int absoluteOffset = offset;
    absoluteOffset += dissectLogHeader(CONTEXT, NEW_LEADERSHIP_TERM, buffer, absoluteOffset, builder);

    final long logLeadershipTermId = buffer.getLong(absoluteOffset, LITTLE_ENDIAN);
    absoluteOffset += SIZE_OF_LONG;

    final long logTruncatePosition = buffer.getLong(absoluteOffset, LITTLE_ENDIAN);
    absoluteOffset += SIZE_OF_LONG;

    final long leadershipTermId = buffer.getLong(absoluteOffset, LITTLE_ENDIAN);
    absoluteOffset += SIZE_OF_LONG;

    final long logPosition = buffer.getLong(absoluteOffset, LITTLE_ENDIAN);
    absoluteOffset += SIZE_OF_LONG;

    final long timestamp = buffer.getLong(absoluteOffset, LITTLE_ENDIAN);
    absoluteOffset += SIZE_OF_LONG;

    final int leaderMemberId = buffer.getInt(absoluteOffset, LITTLE_ENDIAN);
    absoluteOffset += SIZE_OF_INT;

    final int logSessionId = buffer.getInt(absoluteOffset, LITTLE_ENDIAN);
    absoluteOffset += SIZE_OF_INT;

    final boolean isStartup = 1 == buffer.getInt(absoluteOffset, LITTLE_ENDIAN);

    builder.append(": logLeadershipTermId=").append(logLeadershipTermId)
        .append(", logTruncatePosition=").append(logTruncatePosition)
        .append(", leadershipTermId=").append(leadershipTermId)
        .append(", logPosition=").append(logPosition)
        .append(", timestamp=").append(timestamp)
        .append(", leaderMemberId=").append(leaderMemberId)
        .append(", logSessionId=").append(logSessionId)
        .append(", isStartup=").append(isStartup);
}
 

static int dissectLogHeader(
    final String context,
    final Enum<?> code,
    final MutableDirectBuffer buffer,
    final int offset,
    final StringBuilder builder)
{
    int relativeOffset = 0;

    final int captureLength = buffer.getInt(offset + relativeOffset, LITTLE_ENDIAN);
    relativeOffset += SIZE_OF_INT;

    final int bufferLength = buffer.getInt(offset + relativeOffset, LITTLE_ENDIAN);
    relativeOffset += SIZE_OF_INT;

    final long timestampNs = buffer.getLong(offset + relativeOffset, LITTLE_ENDIAN);
    relativeOffset += SIZE_OF_LONG;

    builder
        .append('[')
        .append(((double)timestampNs) / NANOS_PER_SECOND)
        .append("] ")
        .append(context)
        .append(": ")
        .append(code.name())
        .append(" [")
        .append(captureLength)
        .append('/')
        .append(bufferLength)
        .append(']');

    return relativeOffset;
}