Examples of org.apache.hadoop.hbase.util.HashedBytes

org.apache.hadoop.hbase.util.HashedBytes
This class encapsulates a byte array and overrides hashCode and equals so that it's identity is based on the data rather than the array instance.

  /**
   * Release the row lock!
   * @param lockId  The lock ID to release.
   */
  public void releaseRowLock(final Integer lockId) {
    HashedBytes rowKey = lockIds.remove(lockId);
    if (rowKey == null) {
      LOG.warn("Release unknown lockId: " + lockId);
      return;
    }
    CountDownLatch rowLatch = lockedRows.remove(rowKey);

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   */
  public RowLock getRowLock(byte[] row, boolean waitForLock) throws IOException {
    checkRow(row, "row lock");
    startRegionOperation();
    try {
      HashedBytes rowKey = new HashedBytes(row);
      RowLockContext rowLockContext = new RowLockContext(rowKey);


      // loop until we acquire the row lock (unless !waitForLock)
      while (true) {
        RowLockContext existingContext = lockedRows.putIfAbsent(rowKey, rowLockContext);

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  private Integer internalObtainRowLock(final byte[] row, boolean waitForLock)
      throws IOException {
    checkRow(row, "row lock");
    startRegionOperation();
    try {
      HashedBytes rowKey = new HashedBytes(row);
      CountDownLatch rowLatch = new CountDownLatch(1);


      // loop until we acquire the row lock (unless !waitForLock)
      while (true) {
        CountDownLatch existingLatch = lockedRows.putIfAbsent(rowKey, rowLatch);
        if (existingLatch == null) {
          break;
        } else {
          // row already locked
          if (!waitForLock) {
            return null;
          }
          try {
            if (!existingLatch.await(this.rowLockWaitDuration,
                            TimeUnit.MILLISECONDS)) {
                return null;
            }
          } catch (InterruptedException ie) {
            // Empty
          }
        }
      }


      // loop until we generate an unused lock id
      while (true) {
        Integer lockId = lockIdGenerator.incrementAndGet();
        HashedBytes existingRowKey = lockIds.putIfAbsent(lockId, rowKey);
        if (existingRowKey == null) {
          return lockId;
        } else {
          // lockId already in use, jump generator to a new spot
          lockIdGenerator.set(rand.nextInt());

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   * Used by unit tests.
   * @param lockid
   * @return Row that goes with <code>lockid</code>
   */
  byte[] getRowFromLock(final Integer lockid) {
    HashedBytes rowKey = lockIds.get(lockid);
    return rowKey == null ? null : rowKey.getBytes();
  }

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  /**
   * Release the row lock!
   * @param lockId  The lock ID to release.
   */
  public void releaseRowLock(final Integer lockId) {
    HashedBytes rowKey = lockIds.remove(lockId);
    if (rowKey == null) {
      LOG.warn("Release unknown lockId: " + lockId);
      return;
    }
    CountDownLatch rowLatch = lockedRows.remove(rowKey);

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  private Integer internalObtainRowLock(final byte[] row, boolean waitForLock)
      throws IOException {
    checkRow(row);
    startRegionOperation();
    try {
      HashedBytes rowKey = new HashedBytes(row);
      CountDownLatch rowLatch = new CountDownLatch(1);
      
      // loop until we acquire the row lock (unless !waitForLock)
      while (true) {
        CountDownLatch existingLatch = lockedRows.putIfAbsent(rowKey, rowLatch);
        if (existingLatch == null) {
          break;
        } else {
          // row already locked
          if (!waitForLock) {
            return null;
          }
          try {
            if (!existingLatch.await(this.rowLockWaitDuration,
                            TimeUnit.MILLISECONDS)) {
                return null;
            }
          } catch (InterruptedException ie) {
            // Empty
          }
        }
      }
       
      // loop until we generate an unused lock id
      while (true) {
        Integer lockId = lockIdGenerator.incrementAndGet();
        HashedBytes existingRowKey = lockIds.putIfAbsent(lockId, rowKey);
        if (existingRowKey == null) {
          return lockId;
        } else {
          // lockId already in use, jump generator to a new spot
          lockIdGenerator.set(rand.nextInt());

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   * Used by unit tests.
   * @param lockid
   * @return Row that goes with <code>lockid</code>
   */
  byte[] getRowFromLock(final Integer lockid) {
    HashedBytes rowKey = lockIds.get(lockid);
    return rowKey == null ? null : rowKey.getBytes();
  }

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  /**
   * Release the row lock!
   * @param lockId  The lock ID to release.
   */
  void releaseRowLock(final Integer lockId) {
    HashedBytes rowKey = lockIds.remove(lockId);
    if (rowKey == null) {
      LOG.warn("Release unknown lockId: " + lockId);
      return;
    }
    CountDownLatch rowLatch = lockedRows.remove(rowKey);

View Full Code Here

  private Integer internalObtainRowLock(final byte[] row, boolean waitForLock)
      throws IOException {
    checkRow(row);
    startRegionOperation();
    try {
      HashedBytes rowKey = new HashedBytes(row);
      CountDownLatch rowLatch = new CountDownLatch(1);
      
      // loop until we acquire the row lock (unless !waitForLock)
      while (true) {
        CountDownLatch existingLatch = lockedRows.putIfAbsent(rowKey, rowLatch);
        if (existingLatch == null) {
          break;
        } else {
          // row already locked
          if (!waitForLock) {
            return null;
          }
          try {
            if (!existingLatch.await(this.rowLockWaitDuration,
                            TimeUnit.MILLISECONDS)) {
                return null;
            }
          } catch (InterruptedException ie) {
            // Empty
          }
        }
      }
       
      // loop until we generate an unused lock id
      while (true) {
        Integer lockId = lockIdGenerator.incrementAndGet();
        HashedBytes existingRowKey = lockIds.putIfAbsent(lockId, rowKey);
        if (existingRowKey == null) {
          return lockId;
        } else {
          // lockId already in use, jump generator to a new spot
          lockIdGenerator.set(rand.nextInt());

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   * Used by unit tests.
   * @param lockid
   * @return Row that goes with <code>lockid</code>
   */
  byte[] getRowFromLock(final Integer lockid) {
    HashedBytes rowKey = lockIds.get(lockid);
    return rowKey == null ? null : rowKey.getBytes();
  }

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org.apache.hadoop.hbase.regionserver.HRegion

org.apache.hadoop.hbase.regionserver.TestBatchHRegionLockingAndWrites

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