Package uk.gov.gchq.gaffer.federated.simple.operation.handler

Class FederatedOutputHandler<P extends Output<O>,O>

java.lang.Object

uk.gov.gchq.gaffer.federated.simple.operation.handler.FederatedOperationHandler<P>

uk.gov.gchq.gaffer.federated.simple.operation.handler.FederatedOutputHandler<P,O>

All Implemented Interfaces:

OperationHandler<P>, OutputOperationHandler<P,O>

Direct Known Subclasses:

GetSchemaHandler

public class FederatedOutputHandler<P extends Output<O>,O>
extends FederatedOperationHandler<P>
implements OutputOperationHandler<P,O>

A sub class operation handler for federation that can process operations that have an output associated with them. Will apply a FederatedResultAccumulator to merge and reduce the results from multiple graphs into one.

Field Summary

Fields inherited from class uk.gov.gchq.gaffer.federated.simple.operation.handler.FederatedOperationHandler

OPT_AGGREGATE_ELEMENTS, OPT_EXCLUDE_GRAPH_IDS, OPT_GRAPH_IDS, OPT_SEPARATE_RESULTS, OPT_SHORT_GRAPH_IDS, OPT_SKIP_FAILED_EXECUTE, OPT_USE_DFLT_GRAPH_IDS

Constructor Summary

Constructors

Constructor	Description
FederatedOutputHandler()

Method Summary

Modifier and Type	Method	Description
O	doOperation(P operation, Context context, Store store)	Execute the given Operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

FederatedOutputHandler

public FederatedOutputHandler()

Method Detail

doOperation

public O doOperation(P operation,
                     Context context,
                     Store store)
              throws OperationException

Description copied from interface: OperationHandler

Execute the given Operation.

Specified by:

doOperation in interface OperationHandler<P extends Output<O>>

Specified by:

doOperation in interface OutputOperationHandler<P extends Output<O>,O>

Overrides:

doOperation in class FederatedOperationHandler<P extends Output<O>>

Parameters:

operation - the Operation to be executed

context - the operation chain context, containing the user who executed the operation

store - the Store the operation should be run on

Returns:

the output for the operation or null.

Throws:

OperationException - thrown if the operation fails