/*
* Copyright 2002-2020 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.transaction.event;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import org.springframework.context.event.EventListener;
import org.springframework.core.annotation.AliasFor;
An EventListener
that is invoked according to a TransactionPhase
. This is an an annotation-based equivalent of TransactionalApplicationListener
. If the event is not published within an active transaction, the event is discarded unless the fallbackExecution
flag is explicitly set. If a transaction is running, the event is processed according to its TransactionPhase
.
Adding @Order
to your annotated method allows you to prioritize that listener amongst other listeners running before or after transaction completion.
NOTE: Transactional event listeners only work with thread-bound transactions managed by PlatformTransactionManager
. A reactive transaction managed by ReactiveTransactionManager
uses the Reactor context instead of thread-local attributes, so from the perspective of an event listener, there is no compatible active transaction that it can participate in.
Author: Stephane Nicoll, Sam Brannen, Oliver Drotbohm See Also: Since: 4.2
/**
* An {@link EventListener} that is invoked according to a {@link TransactionPhase}.
* This is an an annotation-based equivalent of {@link TransactionalApplicationListener}.
*
* <p>If the event is not published within an active transaction, the event is discarded
* unless the {@link #fallbackExecution} flag is explicitly set. If a transaction is
* running, the event is processed according to its {@code TransactionPhase}.
*
* <p>Adding {@link org.springframework.core.annotation.Order @Order} to your annotated
* method allows you to prioritize that listener amongst other listeners running before
* or after transaction completion.
*
* <p><b>NOTE: Transactional event listeners only work with thread-bound transactions
* managed by {@link org.springframework.transaction.PlatformTransactionManager}.</b>
* A reactive transaction managed by {@link org.springframework.transaction.ReactiveTransactionManager}
* uses the Reactor context instead of thread-local attributes, so from the perspective of
* an event listener, there is no compatible active transaction that it can participate in.
*
* @author Stephane Nicoll
* @author Sam Brannen
* @author Oliver Drotbohm
* @since 4.2
* @see TransactionalApplicationListener
* @see TransactionalApplicationListenerMethodAdapter
*/
@Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@EventListener
public @interface TransactionalEventListener {
Phase to bind the handling of an event to.
The default phase is TransactionPhase.AFTER_COMMIT
.
If no transaction is in progress, the event is not processed at all unless fallbackExecution
has been enabled explicitly.
/**
* Phase to bind the handling of an event to.
* <p>The default phase is {@link TransactionPhase#AFTER_COMMIT}.
* <p>If no transaction is in progress, the event is not processed at
* all unless {@link #fallbackExecution} has been enabled explicitly.
*/
TransactionPhase phase() default TransactionPhase.AFTER_COMMIT;
An optional identifier to uniquely reference the listener.
See Also: Since: 5.3
/**
* An optional identifier to uniquely reference the listener.
* @since 5.3
* @see TransactionalApplicationListener#getListenerId()
*/
String id() default "";
Whether the event should be processed if no transaction is running.
/**
* Whether the event should be processed if no transaction is running.
*/
boolean fallbackExecution() default false;
Alias for classes
. /**
* Alias for {@link #classes}.
*/
@AliasFor(annotation = EventListener.class, attribute = "classes")
Class<?>[] value() default {};
The event classes that this listener handles.
If this attribute is specified with a single value, the annotated
method may optionally accept a single parameter. However, if this
attribute is specified with multiple values, the annotated method
must not declare any parameters.
/**
* The event classes that this listener handles.
* <p>If this attribute is specified with a single value, the annotated
* method may optionally accept a single parameter. However, if this
* attribute is specified with multiple values, the annotated method
* must <em>not</em> declare any parameters.
*/
@AliasFor(annotation = EventListener.class, attribute = "classes")
Class<?>[] classes() default {};
Spring Expression Language (SpEL) attribute used for making the event
handling conditional.
The default is ""
, meaning the event is always handled.
See Also: - condition.condition
/**
* Spring Expression Language (SpEL) attribute used for making the event
* handling conditional.
* <p>The default is {@code ""}, meaning the event is always handled.
* @see EventListener#condition
*/
String condition() default "";
}