List of coprocessorExec() Examples

Examples of coprocessorExec()

org.apache.hadoop.hbase.client.HTable.coprocessorExec()
{@inheritDoc}
org.apache.hadoop.hbase.client.HTableInterface.coprocessorExec()
Invoke the passed {@link org.apache.hadoop.hbase.client.coprocessor.Batch.Call} againstthe {@link CoprocessorProtocol} instances running in the selected regions.All regions beginning with the region containing the startKey row, through to the region containing the endKey row (inclusive) will be used. If startKey or endKey is null, the first and last regions in the table, respectively, will be used in the range selection. @param protocol the CoprocessorProtocol implementation to call @param startKey start region selection with region containing this row @param endKey select regions up to and including the region containingthis row @param callable wraps the CoprocessorProtocol implementation method callsmade per-region @param < T> CoprocessorProtocol subclass for the remote invocation @param < R> Return type for the{@link org.apache.hadoop.hbase.client.coprocessor.Batch.Call#call(Object)}method @return a Map of region names to{@link org.apache.hadoop.hbase.client.coprocessor.Batch.Call#call(Object)} return values

Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()


  @Test
  public void testNullReturn() throws Throwable {
    HTable table = new HTable(util.getConfiguration(), TEST_TABLE);


    Map<byte[],String> results = table.coprocessorExec(PingProtocol.class,
        ROW_A, ROW_C,
        new Batch.Call<PingProtocol,String>(){
          public String call(PingProtocol instance) {
            return instance.hello("nobody");
          }

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Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()


  @Test
  public void testVoidReturnType() throws Throwable {
    HTable table = new HTable(util.getConfiguration(), TEST_TABLE);


    Map<byte[],Object> results = table.coprocessorExec(PingProtocol.class,
        ROW_A, ROW_C,
        new Batch.Call<PingProtocol,Object>(){
          public Object call(PingProtocol instance) {
            instance.noop();
            return null;

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Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()

        new Get(ROW_A), new Get(ROW_B), new Get(ROW_C));


    Batch.Call<PingProtocol,String> call =  Batch.forMethod(PingProtocol.class,
        "ping");
    Map<byte[],String> results =
        table.coprocessorExec(PingProtocol.class, ROW_A, ROW_C, call);




    verifyRegionResults(table, results, ROW_A);
    verifyRegionResults(table, results, ROW_B);
    verifyRegionResults(table, results, ROW_C);

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Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()

    verifyRegionResults(table, results, ROW_C);


    Batch.Call<PingProtocol,String> helloCall =
      Batch.forMethod(PingProtocol.class, "hello", "NAME");
    results =
        table.coprocessorExec(PingProtocol.class, ROW_A, ROW_C, helloCall);




    verifyRegionResults(table, results, "Hello, NAME", ROW_A);
    verifyRegionResults(table, results, "Hello, NAME", ROW_B);
    verifyRegionResults(table, results, "Hello, NAME", ROW_C);

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Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()

  @Test
  public void testRowRange() throws Throwable {
    HTable table = new HTable(util.getConfiguration(), TEST_TABLE);


    // test empty range
    Map<byte[],String> results = table.coprocessorExec(PingProtocol.class,
        null, null, new Batch.Call<PingProtocol,String>() {
          public String call(PingProtocol instance) {
            return instance.ping();
          }
        });

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Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()

      public synchronized void update(byte[] region, byte[] row, R result) {
        max = (max == null || (result != null && ci.compare(max, result) < 0)) ? result : max;
      }
    }
    MaxCallBack aMaxCallBack = new MaxCallBack();
    table.coprocessorExec(AggregateProtocol.class, scan.getStartRow(), scan
        .getStopRow(), new Batch.Call<AggregateProtocol, R>() {
      @Override
      public R call(AggregateProtocol instance) throws IOException {
        return instance.getMax(ci, scan);
      }

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Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()

        min = (min == null || (result != null && ci.compare(result, min) < 0)) ? result : min;
      }
    }
    HTable table = new HTable(conf, tableName);
    MinCallBack minCallBack = new MinCallBack();
    table.coprocessorExec(AggregateProtocol.class, scan.getStartRow(), scan
        .getStopRow(), new Batch.Call<AggregateProtocol, R>() {


      @Override
      public R call(AggregateProtocol instance) throws IOException {
        return instance.getMin(ci, scan);

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Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()

        rowCountL.addAndGet(result.longValue());
      }
    }
    RowNumCallback rowNum = new RowNumCallback();
    HTable table = new HTable(conf, tableName);
    table.coprocessorExec(AggregateProtocol.class, scan.getStartRow(), scan
        .getStopRow(), new Batch.Call<AggregateProtocol, Long>() {
      @Override
      public Long call(AggregateProtocol instance) throws IOException {
        return instance.getRowNum(ci, scan);
      }

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Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()

        sumVal = ci.add(sumVal, result);
      }
    }
    SumCallBack sumCallBack = new SumCallBack();
    HTable table = new HTable(conf, tableName);
    table.coprocessorExec(AggregateProtocol.class, scan.getStartRow(), scan
        .getStopRow(), new Batch.Call<AggregateProtocol, S>() {
      @Override
      public S call(AggregateProtocol instance) throws IOException {
        return instance.getSum(ci, scan);
      }

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Examples of org.apache.hadoop.hbase.client.HTable.coprocessorExec()

        rowCount += result.getSecond();
      }
    }
    AvgCallBack avgCallBack = new AvgCallBack();
    HTable table = new HTable(conf, tableName);
    table.coprocessorExec(AggregateProtocol.class, scan.getStartRow(), scan
        .getStopRow(), new Batch.Call<AggregateProtocol, Pair<S, Long>>() {
      @Override
      public Pair<S, Long> call(AggregateProtocol instance) throws IOException {
        return instance.getAvg(ci, scan);
      }

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