Package com.espertech.esper.common.client.hook.vdw

Class VirtualDataWindowContext

java.lang.Object

com.espertech.esper.common.client.hook.vdw.VirtualDataWindowContext

public class VirtualDataWindowContext
extends Object

Context for use with virtual data window factory VirtualDataWindowFactory provides contextual information about the named window and the type of events held, handle for posting insert and remove streams and factory for event bean instances.

Constructor Summary

Constructors

Constructor	Description
VirtualDataWindowContext(VirtualDWViewFactory factory, AgentInstanceViewFactoryChainContext agentInstanceViewFactoryContext, EventBeanFactory eventBeanFactory, VirtualDataWindowOutStreamImpl outputStream)	Ctor.

Method Summary

Modifier and Type	Method	Description
AgentInstanceContext	getAgentInstanceContext()	Returns the agent instance (context partition) context.
AgentInstanceViewFactoryChainContext	getAgentInstanceViewFactoryContext()	Returns the agent instance context
EventBeanFactory	getEventFactory()	Returns the factory for creating instances of EventBean from rows.
EventType	getEventType()	Returns the event type of the events held in the virtual data window as per declaration of the named window.
VirtualDWViewFactory	getFactory()	Returns the factory
String	getNamedWindowName()	Returns the name of the named window used in connection with the virtual data window.
VirtualDataWindowOutStream	getOutputStream()	Returns a handle for use to send insert and remove stream data to consuming statements.
ExprEvaluator[]	getParameterExpressions()	Returns the expressions passed as parameters to the virtual data window.
Object[]	getParameters()	Returns the parameters passed; for example "create window ABC.my:vdw("10.0.0.1")" passes one paramater here.
StatementContext	getStatementContext()	Returns the statement context which holds statement information (name, expression, id) and statement-level services.

Methods inherited from class java.lang.Object

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

Constructor Details

VirtualDataWindowContext

public VirtualDataWindowContext(VirtualDWViewFactory factory,
 AgentInstanceViewFactoryChainContext agentInstanceViewFactoryContext,
 EventBeanFactory eventBeanFactory,
 VirtualDataWindowOutStreamImpl outputStream)

Ctor.

Parameters:

factory - factory

agentInstanceViewFactoryContext - context

eventBeanFactory - event bean factory

outputStream - output stream

Method Details

getStatementContext

public StatementContext getStatementContext()

Returns the statement context which holds statement information (name, expression, id) and statement-level services.

Returns:

statement context

getEventType

public EventType getEventType()

Returns the event type of the events held in the virtual data window as per declaration of the named window.

Returns:

event type

getParameters

public Object[] getParameters()

Returns the parameters passed; for example "create window ABC.my:vdw("10.0.0.1")" passes one paramater here.

Returns:

parameters

getEventFactory

public EventBeanFactory getEventFactory()

Returns the factory for creating instances of EventBean from rows.

Returns:

event bean factory

getOutputStream

public VirtualDataWindowOutStream getOutputStream()

Returns a handle for use to send insert and remove stream data to consuming statements.

Typically use "context.getOutputStream().update(newData, oldData);" in the update method of the virtual data window.

Returns:

handle for posting insert and remove stream

getNamedWindowName

public String getNamedWindowName()

Returns the name of the named window used in connection with the virtual data window.

Returns:

named window

getParameterExpressions

public ExprEvaluator[] getParameterExpressions()

Returns the expressions passed as parameters to the virtual data window.

Returns:

parameter expressions

getAgentInstanceContext

public AgentInstanceContext getAgentInstanceContext()

Returns the agent instance (context partition) context.

Returns:

context

getFactory

public VirtualDWViewFactory getFactory()

Returns the factory

Returns:

factory

getAgentInstanceViewFactoryContext

public AgentInstanceViewFactoryChainContext getAgentInstanceViewFactoryContext()

Returns the agent instance context

Returns:

agent instance context