org.apache.storm.trident.operation

Class BaseOperation

java.lang.Object

org.apache.storm.trident.operation.BaseOperation

All Implemented Interfaces:

Serializable, Operation

Direct Known Subclasses:

BaseAggregator, BaseFilter, BaseFunction, BaseQueryFunction, BaseStateUpdater, ConsumerExecutor, FlatMapFunctionExecutor, MapFunctionExecutor

public class BaseOperation
extends Object
implements Operation

Convenience implementation of the Operation interface.

Provides no-op implementations of the prepare() and cleanup() methods.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BaseOperation()

Method Summary

Modifier and Type	Method and Description
void	cleanup() No-op implemnation.
void	prepare(Map<String,Object> conf, TridentOperationContext context) No-op implementation.

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseOperation

public BaseOperation()

Method Detail

prepare

public void prepare(Map<String,Object> conf,
                    TridentOperationContext context)

No-op implementation.

Specified by:

prepare in interface Operation

Parameters:

conf - the Storm configuration map

context - the operation context which provides information such as the number of partitions in the stream, and the current partition index. It also provides methods for registering operation-specific metrics.

See Also:

TridentOperationContext

cleanup

public void cleanup()

No-op implemnation.

Specified by:

cleanup in interface Operation