Examples of org.hbase.async.PutRequest

org.hbase.async.PutRequest
Puts some data into HBase.
A note on passing {@code byte} arrays in argument
None of the method that receive a {@code byte[]} in argument will copy it.For more info, please refer to the documentation of {@link HBaseRpc}.
A note on passing {@code String}s in argument
All strings are assumed to use the platform's default charset.
A note on passing {@code timestamp}s in argument
HBase orders all the writes based on timestamps from {@code PutRequest}irrespective of the actual order in which they're received or stored by a RegionServer. In other words, if you send a first {@code PutRequest}with timestamp T, and then later send another one for the same table, key, family and qualifier, but with timestamp T - 1, then the second write will look like it was applied before the first one when you read this cell back from HBase. When manually setting timestamps, it is thus strongly recommended to use real UNIX timestamps in milliseconds, e.g. from {@link System#currentTimeMillis}.
If you want to let HBase set the timestamp on a write at the time it's applied within the RegionServer, then use {@link KeyValue#TIMESTAMP_NOW}as a timestamp. The timestamp is set right before being written to the WAL (Write Ahead Log). Note however that this has a subtle consequence: if a write succeeds from the server's point of view, but fails from the client's point of view (maybe because the client got disconnected from the server before the server could acknowledge the write), then if the client retries the write it will create another version of the cell with a different timestamp.

  public void timestampsFilter() throws Exception {
    client.setFlushInterval(FAST_FLUSH);
    final byte[] tableBytes = Bytes.UTF8(table);
    final byte[] familyBytes = Bytes.UTF8(family);
    final byte[] qualifier = Bytes.UTF8("q");
    final PutRequest put1 =
      new PutRequest(tableBytes, Bytes.UTF8("tf1"), familyBytes, qualifier, Bytes.UTF8("v1"), 1L);
    final PutRequest put2 =
      new PutRequest(tableBytes, Bytes.UTF8("tf2"), familyBytes, qualifier, Bytes.UTF8("v2"), 2L);
    final PutRequest put3 =
      new PutRequest(tableBytes, Bytes.UTF8("tf3"), familyBytes, qualifier, Bytes.UTF8("v3"), 3L);
    Deferred.group(client.put(put1), client.put(put2), client.put(put3)).join();
    final Scanner scanner = client.newScanner(table);
    scanner.setFamily(family);
    scanner.setStartKey(Bytes.UTF8("tf"));
    scanner.setStopKey(Bytes.UTF8("tf4"));

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  /** Regression test for issue #2. */
  @Test
  public void regression2() throws Exception {
    try {
      final PutRequest put1 = new PutRequest(table, "k1", family, "q", "val1");
      final PutRequest put2 = new PutRequest(table, "k2", family, "q", "val2");
      LOG.info("Before calling put()");
      client.put(put1);
      client.put(put2);
      LOG.info("After calling put()");
    } finally {

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    final String table2 = args[0] + "2";
    final String family = args[1];
    createOrTruncateTable(client, table1, family);
    createOrTruncateTable(client, table2, family);
    for (int i = 0; i < 2; i++) {
      final PutRequest put;
      final String key = 'k' + String.valueOf(i);
      if (i % 2 == 0) {
        put = new PutRequest(table1, key, family, "q", "v");
      } else {
        put = new PutRequest(table2, key, family, "q", "v");
      }
      final DeleteRequest delete = new DeleteRequest(put.table(), put.key());
      client.delete(delete);
      client.put(put);
    }
    client.flush().joinUninterruptibly();
  }

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    key[1] = '4';
    key[2] = '0';
    key[key.length - 1] = '*';
    final byte[] family = TestIntegration.family.getBytes();
    final byte[] qual = { 'q' };
    final PutRequest put = new PutRequest(table, key, family, qual,
                                          new byte[0] /* empty */);
    final GetRequest get = new GetRequest(table, key);
    client.put(put).join();
    final ArrayList<KeyValue> kvs = client.get(get).join();
    assertSizeIs(1, kvs);

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      if (args[1].charAt(0) == 'l') {  // locked version of the command
        final RowLockRequest rlr = new RowLockRequest(args[2], args[3]);
        lock = client.lockRow(rlr).joinUninterruptibly();
        LOG.info("Acquired explicit row lock: " + lock);
      }
      final PutRequest put = lock == null
        ? new PutRequest(args[2], args[3], args[4], args[5], args[6])
        : new PutRequest(args[2], args[3], args[4], args[5], args[6], lock);
      args = null;
      try {
        final Object result = client.put(put).joinUninterruptibly();
        LOG.info("Put result=" + result);
      } catch (Exception e) {

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        }
        
        // reset the change map so we don't keep writing
        initializeChangedMap();
        
        final PutRequest put = new PutRequest(tsdb.treeTable(), 
            Tree.idToBytes(tree_id), TREE_FAMILY, TREE_QUALIFIER, 
            stored_tree.toStorageJson());
        return tsdb.getClient().compareAndSet(put, original_tree);
      }

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    // compile the object for storage, this will toss exceptions if we are
    // missing anything important
    final byte[] storage_data = toStorageJson();


    final PutRequest put = new PutRequest(tsdb.treeTable(), row, Tree.TREE_FAMILY(), 
        BRANCH_QUALIFIER, storage_data);
    put.setBufferable(true);
    storage_results.add(tsdb.getClient().compareAndSet(put, new byte[0]));
    
    // store leaves if told to and put the storage calls in our deferred group
    if (store_leaves && leaves != null && !leaves.isEmpty()) {
      for (final Leaf leaf : leaves.values()) {

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          Annotation.this.syncNote(stored_note, overwrite);
        }
        
        final byte[] tsuid_byte = tsuid != null && !tsuid.isEmpty() ? 
            UniqueId.stringToUid(tsuid) : null;
        final PutRequest put = new PutRequest(tsdb.dataTable(), 
            getRowKey(start_time, tsuid_byte), FAMILY, 
            getQualifier(start_time), 
            Annotation.this.getStorageJSON());
        return tsdb.getClient().compareAndSet(put, original_note);
      }

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          Annotation.this.syncNote(stored_note, overwrite);
        }
        
        final byte[] tsuid_byte = tsuid != null && !tsuid.isEmpty() ? 
            UniqueId.stringToUid(tsuid) : null;
        final PutRequest put = new PutRequest(tsdb.dataTable(), 
            getRowKey(start_time, tsuid_byte), FAMILY, 
            getQualifier(start_time), 
            Annotation.this.getStorageJSON());
        return tsdb.getClient().compareAndSet(put, original_note);
      }

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          // verify the name is set locally just to be safe
          if (name == null || name.isEmpty()) {
            local_meta.name = name;
          }
          
          final PutRequest put = new PutRequest(tsdb.uidTable(), 
              UniqueId.stringToUid(uid), FAMILY, 
              (type.toString().toLowerCase() + "_meta").getBytes(CHARSET), 
              local_meta.getStorageJSON());
          return tsdb.getClient().compareAndSet(put, original_meta);
        }

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Examples of org.hbase.async.PutRequest

A note on passing {@code byte} arrays in argument

A note on passing {@code String}s in argument

A note on passing {@code timestamp}s in argument

Related Classes of org.hbase.async.PutRequest