org.apache.ignite.internal.processors.streamer

Class GridStreamerContextDelegate

java.lang.Object

org.apache.ignite.internal.processors.streamer.GridStreamerContextDelegate

All Implemented Interfaces:

StreamerContext

public class GridStreamerContextDelegate
extends Object
implements StreamerContext

Context delegate allowing to override next stage name.

Constructor Summary

Constructors

Constructor and Description
GridStreamerContextDelegate(StreamerContext delegate, String nextStageName)

Method Summary

Methods

Modifier and Type	Method and Description
void	broadcast(IgniteInClosure<StreamerContext> clo) Queries all streamer nodes deployed within grid.
void	broadcast(IgniteInClosure<StreamerContext> clo, Collection<ClusterNode> nodes) Queries streamer nodes deployed within grid.
<K,V> ConcurrentMap<K,V>	localSpace() Gets streamer local space.
String	nextStageName() For context passed to StreamerStage.run(StreamerContext, Collection) this method will return next stage name in execution pipeline.
ClusterGroup	projection() Gets instance of dynamic grid projection including all nodes on which this streamer is running.
<R> Collection<R>	query(IgniteClosure<StreamerContext,R> clo) Queries all streamer nodes deployed within grid.
<R> Collection<R>	query(IgniteClosure<StreamerContext,R> clo, Collection<ClusterNode> nodes) Queries streamer nodes deployed within grid.
<R1,R2> R2	reduce(IgniteClosure<StreamerContext,R1> clo, IgniteReducer<R1,R2> rdc) Queries all streamer nodes deployed within grid.
<R1,R2> R2	reduce(IgniteClosure<StreamerContext,R1> clo, IgniteReducer<R1,R2> rdc, Collection<ClusterNode> nodes) Queries streamer nodes deployed within grid.
<E> StreamerWindow<E>	window() Gets default event window, i.e. window that is on the first place in streamer configuration.
<E> StreamerWindow<E>	window(String winName) Gets streamer event window by window name, if no window with such name was configured IllegalArgumentException will be thrown.

Methods inherited from class java.lang.Object

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

Constructor Detail

GridStreamerContextDelegate

public GridStreamerContextDelegate(StreamerContext delegate,
                           @Nullable
                           String nextStageName)

Parameters:

delegate - Delegate object.

nextStageName - Next stage name.

Method Detail

projection

public ClusterGroup projection()

Gets instance of dynamic grid projection including all nodes on which this streamer is running.

Specified by:

projection in interface StreamerContext

Returns:

Projection with all nodes on which streamer is configured.

localSpace

public <K,V> ConcurrentMap<K,V> localSpace()

Gets streamer local space. Note that all updates to this space will be local.

Specified by:

localSpace in interface StreamerContext

Returns:

Streamer local space.

window

public <E> StreamerWindow<E> window()

Gets default event window, i.e. window that is on the first place in streamer configuration.

Specified by:

window in interface StreamerContext

Returns:

Default window.

window

public <E> StreamerWindow<E> window(String winName)

Gets streamer event window by window name, if no window with such name was configured IllegalArgumentException will be thrown.

Specified by:

window in interface StreamerContext

Parameters:

winName - Window name.

Returns:

Window instance.

nextStageName

public String nextStageName()

For context passed to StreamerStage.run(StreamerContext, Collection) this method will return next stage name in execution pipeline. For context obtained from streamer object, this method will return first stage name.

Specified by:

nextStageName in interface StreamerContext

Returns:

Next stage name depending on invocation context.

query

public <R> Collection<R> query(IgniteClosure<StreamerContext,R> clo)

Queries all streamer nodes deployed within grid. Given closure will be executed on each node on which streamer is configured. Streamer context local for that node will be passed to closure during execution. All results returned by closure will be added to result collection.

Specified by:

query in interface StreamerContext

Parameters:

clo - Function to be executed on individual nodes.

Returns:

Result received from all streamers.

query

public <R> Collection<R> query(IgniteClosure<StreamerContext,R> clo,
                      Collection<ClusterNode> nodes)

Queries streamer nodes deployed within grid. Given closure will be executed on those of passed nodes on which streamer is configured. Streamer context local for that node will be passed to closure during execution. All results returned by closure will be added to result collection.

Specified by:

query in interface StreamerContext

Parameters:

clo - Function to be executed on individual nodes.

nodes - Optional list of nodes to execute query on, if empty, then all nodes on which this streamer is running will be queried.

Returns:

Result received from all streamers.

broadcast

public void broadcast(IgniteInClosure<StreamerContext> clo)

Queries all streamer nodes deployed within grid. Given closure will be executed on each streamer node in the grid. No result is collected.

Specified by:

broadcast in interface StreamerContext

Parameters:

clo - Function to be executed on individual nodes.

broadcast

public void broadcast(IgniteInClosure<StreamerContext> clo,
             Collection<ClusterNode> nodes)

Queries streamer nodes deployed within grid. Given closure will be executed on those of passed nodes on which streamer is configured. No result is collected.

Specified by:

broadcast in interface StreamerContext

Parameters:

clo - Function to be executed on individual nodes.

nodes - Optional list of nodes to execute query on, if empty, then all nodes on which this streamer is running will be queried.

reduce

public <R1,R2> R2 reduce(IgniteClosure<StreamerContext,R1> clo,
                IgniteReducer<R1,R2> rdc)

Queries all streamer nodes deployed within grid. Given closure will be executed on each streamer node in the grid. Streamer context local for that node will be passed to closure during execution. Results returned by closure will be passed to given reducer.

Specified by:

reduce in interface StreamerContext

Parameters:

clo - Function to be executed on individual nodes.

rdc - Reducer to reduce results received from remote nodes.

Returns:

Reducer result.

reduce

public <R1,R2> R2 reduce(IgniteClosure<StreamerContext,R1> clo,
                IgniteReducer<R1,R2> rdc,
                Collection<ClusterNode> nodes)

Queries streamer nodes deployed within grid. Given closure will be executed on those of passed nodes on which streamer is configured. Streamer context local for that node will be passed to closure during execution. Results returned by closure will be passed to given reducer.

Specified by:

reduce in interface StreamerContext

Parameters:

clo - Function to be executed on individual nodes.

rdc - Reducer to reduce results received from remote nodes.

nodes - Optional list of nodes to execute query on, if empty, then all nodes on which this streamer is running will be queried.

Returns:

Reducer result.