org.wso2.siddhi.core.stream.input.source

Class InMemorySource

java.lang.Object

org.wso2.siddhi.core.stream.input.source.Source

org.wso2.siddhi.core.stream.input.source.InMemorySource

All Implemented Interfaces:

Snapshotable

public class InMemorySource
extends Source

Implementation of Source to receive events through in-memory transport.

Nested Class Summary

Nested classes/interfaces inherited from class org.wso2.siddhi.core.stream.input.source.Source

Source.ConnectionCallback

Constructor Summary

Constructors

Constructor and Description
InMemorySource()

Method Summary

Modifier and Type	Method and Description
void	connect(Source.ConnectionCallback connectionCallback) Called to connect to the source backend for receiving events
Map<String,Object>	currentState() Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time
void	destroy() Called at the end to clean all the resources consumed
void	disconnect() Called to disconnect from the source backend, or when ConnectionUnavailableException is thrown
Class[]	getOutputEventClasses() Get produced event class types
void	init(SourceEventListener sourceEventListener, OptionHolder optionHolder, String[] requestedTransportPropertyNames, ConfigReader configReader, SiddhiAppContext siddhiAppContext) To initialize the source.
void	pause() Called to pause event consumption
void	restoreState(Map<String,Object> state) Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.
void	resume() Called to resume event consumption

Methods inherited from class org.wso2.siddhi.core.stream.input.source.Source

connectWithRetry, getElementId, getMapper, getStreamDefinition, getType, init, shutdown

Methods inherited from class java.lang.Object

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

Constructor Detail

InMemorySource

public InMemorySource()

Method Detail

init

public void init(SourceEventListener sourceEventListener,
                 OptionHolder optionHolder,
                 String[] requestedTransportPropertyNames,
                 ConfigReader configReader,
                 SiddhiAppContext siddhiAppContext)

Description copied from class: Source

To initialize the source. (This will be called only once, no connection to external systems should be made at this point).

Specified by:

init in class Source

Parameters:

sourceEventListener - The listener to pass the events for processing which are consumed by the source

optionHolder - Contains static options of the source

requestedTransportPropertyNames - Requested transport properties that should be passed to SourceEventListener

configReader - System configuration reader for source

siddhiAppContext - Siddhi application context

getOutputEventClasses

public Class[] getOutputEventClasses()

Description copied from class: Source

Get produced event class types

Specified by:

getOutputEventClasses in class Source

Returns:

Array of classes that will be produced by the source, null or empty array if it can produce any type of class.

connect

public void connect(Source.ConnectionCallback connectionCallback)
             throws ConnectionUnavailableException

Description copied from class: Source

Called to connect to the source backend for receiving events

Specified by:

connect in class Source

Parameters:

connectionCallback - Callback to pass the ConnectionUnavailableException for connection failure after initial successful connection

Throws:

ConnectionUnavailableException - if it cannot connect to the source backend

disconnect

public void disconnect()

Description copied from class: Source

Called to disconnect from the source backend, or when ConnectionUnavailableException is thrown

Specified by:

disconnect in class Source

destroy

public void destroy()

Description copied from class: Source

Called at the end to clean all the resources consumed

Specified by:

destroy in class Source

pause

public void pause()

Description copied from class: Source

Called to pause event consumption

Specified by:

pause in class Source

resume

public void resume()

Description copied from class: Source

Called to resume event consumption

Specified by:

resume in class Source

currentState

public Map<String,Object> currentState()

Description copied from interface: Snapshotable

Used to collect the serializable state of the processing element, that need to be persisted for the reconstructing the element to the same state on a different point of time

Returns:

stateful objects of the processing element as an array

restoreState

public void restoreState(Map<String,Object> state)

Description copied from interface: Snapshotable

Used to restore serialized state of the processing element, for reconstructing the element to the same state as if was on a previous point of time.

Parameters:

state - the stateful objects of the element as an array on the same order provided by currentState().