gr.uoa.di.madgik.searchlibrary.operatorlibrary.partition
Class PartitionOp

java.lang.Object
  gr.uoa.di.madgik.searchlibrary.operatorlibrary.Unary
      gr.uoa.di.madgik.searchlibrary.operatorlibrary.partition.PartitionOp

public class PartitionOp
extends Unary

Operator class used to perform partitioning on its input org.gcube.searchservice.searchlibrary.resultset.ResultSet based on a specified field and produce a new org.gcube.searchservice.searchlibrary.resultset.ResultSet output holding the locators of the produced org.gcube.searchservice.searchlibrary.resultset.ResultSets, one for each different value of that field.

Author:

john.gerbesiotis - DI NKUA

Field Summary

Fields inherited from class gr.uoa.di.madgik.searchlibrary.operatorlibrary.Unary

inLocator, operatorParameters, stats, timeout, TimeoutDef, timeUnit, TimeUnitDef

Constructor Summary

PartitionOp(URI inLocator, Map<String,String> operatorParameters, StatsContainer stats)
Creates a new PartitionOp with the default timeout for the reader and the writer

PartitionOp(URI inLocator, Map<String,String> operatorParameters, StatsContainer stats, long timeout, TimeUnit timeUnit)
Creates a new PartitionOp with configurable timeout for the reader and the writer

Method Summary

URI	compute() Performs the partitioning operation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PartitionOp

public PartitionOp(URI inLocator,
                   Map<String,String> operatorParameters,
                   StatsContainer stats)
            throws Exception

Creates a new PartitionOp with the default timeout for the reader and the writer

Parameters:

inLocator - The locator of the input

operatorParameters - The field that the partition will be applied upon ("clusterBy")

stats - Statistics

Throws:

Exception

PartitionOp

public PartitionOp(URI inLocator,
                   Map<String,String> operatorParameters,
                   StatsContainer stats,
                   long timeout,
                   TimeUnit timeUnit)
            throws Exception

Creates a new PartitionOp with configurable timeout for the reader and the writer

Parameters:

inLocator - The locator of the input

operatorParameters - The field that the partition will be applied upon ("clusterBy")

stats - Statistics

timeout - The timeout to be used both by the reader and the writer

timeUnit - The time unit of the timeout used

Throws:

Exception

Method Detail

compute

public URI compute()
            throws Exception

Performs the partitioning operation

Specified by:

compute in class Unary

Returns:

The locator of the produced output

Throws:

Exception - An unrecoverable error for the operation occurred