com.arjuna.ats.jta.cdi.async

Class ContextPropagationAsyncHandler

java.lang.Object

com.arjuna.ats.jta.cdi.async.ContextPropagationAsyncHandler

public final class ContextPropagationAsyncHandler
extends Object

Handling asynchronous context propagation calls. It extends transactions until the intercepted method's async return type is completed.

Constructor Summary

Constructors

Constructor and Description
ContextPropagationAsyncHandler()

Method Summary

Modifier and Type	Method and Description
static boolean	tryHandleAsynchronously(TransactionManager tm, Transaction tx, Transactional transactional, AtomicReference objectToHandleRef, Class<?> returnType, RunnableWithException afterEndTransaction) Tries to handle asynchronously the returned type from the @Transactional call.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContextPropagationAsyncHandler

public ContextPropagationAsyncHandler()

Method Detail

tryHandleAsynchronously

public static boolean tryHandleAsynchronously(TransactionManager tm,
                                              Transaction tx,
                                              Transactional transactional,
                                              AtomicReference objectToHandleRef,
                                              Class<?> returnType,
                                              RunnableWithException afterEndTransaction)
                                       throws Exception

Tries to handle asynchronously the returned type from the @Transactional call. This CDI interceptor method checks the return type intercepted method. If it's a asynchronous "type" (objectToHandle is instanceof e.g. CompletionStage) then the transaction completion (committing/roll-backing) will be suspended until the asynchronous code finishes.

If the interceptor returns nothing or just some "normal" return type then synchronous handling is processed. Synchronous means that the transaction is completed just here when the method annotated with @Transactional ends.

Parameters:

tm - transaction manager

tx - the original transaction

transactional - link to method which is annotated with @Transactional

objectToHandleRef - on interceptor proceed this is the returned type which differentiate the action; method changes the object when it was handled asynchronously

returnType -

afterEndTransaction - a lamda invocation on transaction finalization

Returns:

@{code true} if async handling is possible and it was proceeded, @{code false} means async processing is not possible; the method changes the value referenced by @{code objectToHandleRef}, when @{code true} is returned

Throws:

Exception - failure on async processing error happens