Examples of RowLock

org.apache.derby.iapi.store.raw.RowLock
A RowLock represents a qualifier that is to be used when locking a Row through a RecordHandle.
MT - Immutable @see RecordHandle @see LockingPolicy
org.apache.hadoop.hbase.client.RowLock
Holds row name and lock id. @deprecated {@link RowLock} and associated operations are deprecated.
org.apache.hadoop.hbase.regionserver.HRegion.RowLock
org.hbase.async.RowLock
An explicit row lock.
Row locks can be explicitly acquired in order to serialize edits to a given row. This feature may disappear from HBase in the future, so try not to use it if you can.
While a row is locked, no one else can edit that row. Other concurrent attempts to lock that row will block until the lock is released. Beware that the blocking happens inside the RegionServer, so it will tie up a thread of the RegionServer. If you have many clients contending for the same row lock, you can literally starve a RegionServer by blocking all its IPC threads.
Row locks can't be held indefinitely. If you don't release a row lock after a timeout configured on the server side, the lock will be released automatically by the server and any further attempts to use it will yield an {@link UnknownRowLockException}.

Examples of org.apache.derby.iapi.store.raw.RowLock

                                 (grantedQualifier == RowLock.RI)  ||
                                 (grantedQualifier == RowLock.RX2) ||
                                 (grantedQualifier == RowLock.RX3));
    }


    RowLock rlRequested = (RowLock) requestedQualifier;
    RowLock rlGranted  = (RowLock) grantedQualifier;


    return(rlRequested.isCompatible(rlGranted));
  }

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Examples of org.apache.derby.iapi.store.raw.RowLock

                                 (grantedQualifier == RowLock.RI)  ||
                                 (grantedQualifier == RowLock.RX2) ||
                                 (grantedQualifier == RowLock.RX3));
    }


    RowLock rlRequested = (RowLock) requestedQualifier;
    RowLock rlGranted  = (RowLock) grantedQualifier;


    return(rlRequested.isCompatible(rlGranted));
  }

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Examples of org.apache.derby.iapi.store.raw.RowLock

                                 (grantedQualifier == RowLock.RI)  ||
                                 (grantedQualifier == RowLock.RX2) ||
                                 (grantedQualifier == RowLock.RX3));
    }


    RowLock rlRequested = (RowLock) requestedQualifier;
    RowLock rlGranted  = (RowLock) grantedQualifier;


    return(rlRequested.isCompatible(rlGranted));
  }

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Examples of org.apache.derby.iapi.store.raw.RowLock

                                 (grantedQualifier == RowLock.RI)  ||
                                 (grantedQualifier == RowLock.RX2) ||
                                 (grantedQualifier == RowLock.RX3));
    }


    RowLock rlRequested = (RowLock) requestedQualifier;
    RowLock rlGranted  = (RowLock) grantedQualifier;


    return(rlRequested.isCompatible(rlGranted));
  }

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Examples of org.apache.hadoop.hbase.client.RowLock


    startRegionOperation();
    this.writeRequestsCount.increment();
    this.opMetrics.setWriteRequestCountMetrics(this.writeRequestsCount.get());
    try {
      RowLock lock = isPut ? ((Put)w).getRowLock() : ((Delete)w).getRowLock();
      Get get = new Get(row, lock);
      checkFamily(family);
      get.addColumn(family, qualifier);


      // Lock row

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Examples of org.apache.hadoop.hbase.client.RowLock

       byte[] row = randomRowKey();
       Put put = new Put(row);
       put.add(cf, row, row);
       hTable.put(put);


       RowLock lock = hTable.lockRow(row);
       lock.getLockId();
       hTable.unlockRow(lock);


       assertMetricsUpdated(OpType.PUT, OpType.LOCKROW, OpType.UNLOCKROW);
   }

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Examples of org.apache.hadoop.hbase.client.RowLock

    // We can't simply use incrementColumnValue here because the timestamp of
    // the keyvalue will not be changed as long as it remains in memstore, so
    // there will be some unavoidable contention on the row if multiple 
    // Stargate instances are concurrently serving the same user, and three
    // more round trips than otherwise.
    RowLock rl = table.lockRow(row);
    try {
      Get get = new Get(row, rl);
      get.addColumn(USER, TOKENS);
      List<KeyValue> kvs = table.get(get).list();
      if (kvs != null && !kvs.isEmpty()) {

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Examples of org.apache.hadoop.hbase.client.RowLock

    }


    startRegionOperation();
    this.writeRequestsCount.increment();
    try {
      RowLock lock = isPut ? ((Put)w).getRowLock() : ((Delete)w).getRowLock();
      Get get = new Get(row, lock);
      checkFamily(family);
      get.addColumn(family, qualifier);


      // Lock row

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Examples of org.apache.hadoop.hbase.client.RowLock


    startRegionOperation();
    this.writeRequestsCount.increment();
    this.opMetrics.setWriteRequestCountMetrics(this.writeRequestsCount.get());
    try {
      RowLock lock = isPut ? ((Put)w).getRowLock() : ((Delete)w).getRowLock();
      Get get = new Get(row, lock);
      checkFamily(family);
      get.addColumn(family, qualifier);


      // Lock row

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Examples of org.apache.hadoop.hbase.client.RowLock

    byte[] qf1 = "qf1".getBytes();


    long ts = System.currentTimeMillis();
    int maxVersions = 2;
    long lockid = 5;
    RowLock rowLock = new RowLock(lockid);


    Get get = new Get(row, rowLock);
    get.addColumn(fam, qf1);
    get.setTimeRange(ts, ts+1);
    get.setMaxVersions(maxVersions);

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