Class StatefulHandler.StatefulHandlerInvoker

java.lang.Object

io.fluxzero.sdk.tracking.handling.StatefulHandler.StatefulHandlerInvoker

Enclosing class:

StatefulHandler

protected class StatefulHandler.StatefulHandlerInvoker
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
protected final io.fluxzero.common.handling.HandlerInvoker	delegate

Constructor Summary

Constructors

Constructor	Description
StatefulHandlerInvoker(io.fluxzero.common.handling.HandlerInvoker delegate, Entry<?> currentEntry, DeserializingMessage message)

Method Summary

Modifier and Type	Method	Description
default io.fluxzero.common.handling.HandlerInvoker	andFinally(io.fluxzero.common.handling.HandlerInvoker arg0)
protected Object	computeId(Object handler)
boolean	expectResult()
Executable	getMethod()
<A extends Annotation> A	getMethodAnnotation()
Class<?>	getTargetClass()
protected void	handleResult(Object result)	Applies stateful persistence semantics to a handler invocation result.
default Object	invoke()
Object	invoke(BiFunction<Object,Object,Object> combiner)
boolean	isPassive()
String	toString()
protected Object	tryStoreResult(Object result)	Stores a result object if it is assignable to the stateful handler type.

Methods inherited from class Object

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

Field Details

delegate

protected final io.fluxzero.common.handling.HandlerInvoker delegate

Constructor Details

StatefulHandlerInvoker

public StatefulHandlerInvoker(io.fluxzero.common.handling.HandlerInvoker delegate,
 Entry<?> currentEntry,
 DeserializingMessage message)

Method Details

invoke

public Object invoke(BiFunction<Object,Object,Object> combiner)

handleResult

protected void handleResult(Object result)

Applies stateful persistence semantics to a handler invocation result.

Supported result forms:

• Collection<?>: stores every same-type instance in the collection. If the collection is empty, the current entry is deleted. If the current entry ID is not part of returned IDs, the current entry is deleted.
• null: deletes the current entry only when the invoked method is expected to return handler state (same/assignable handler type).
• Single object: stores it only if it is assignable to the handler type. If the stored ID differs from the current ID, the current entry is deleted (replacement behavior).

tryStoreResult

protected Object tryStoreResult(Object result)

Stores a result object if it is assignable to the stateful handler type.

Parameters:

result - object returned from a handler method

Returns:

the computed/stored handler ID, or null if the result is not a stateful handler instance

computeId

protected Object computeId(Object handler)

getTargetClass

public Class<?> getTargetClass()

getMethod

public Executable getMethod()

getMethodAnnotation

public <A extends Annotation> A getMethodAnnotation()

expectResult

public boolean expectResult()

isPassive

public boolean isPassive()

toString

public String toString()

Overrides:

toString in class Object

andFinally

default io.fluxzero.common.handling.HandlerInvoker andFinally(io.fluxzero.common.handling.HandlerInvoker arg0)

invoke

default Object invoke()