spring-kafka ConsumerStoppedEvent 源码
spring-kafka ConsumerStoppedEvent 代码
文件路径：/spring-kafka/src/main/java/org/springframework/kafka/event/ConsumerStoppedEvent.java
/*
* Copyright 2018-2020 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.kafka.event;
/**
* An event published when a consumer is stopped. While it is best practice to use
* stateless listeners, you can consume this event to clean up any thread-based resources
* (remove ThreadLocals, destroy thread-scoped beans etc), as long as the context event
* multicaster is not modified to use an async task executor. You can also use this event
* to restart a container that was stopped because a transactional producer was fenced.
*
* @author Gary Russell
* @since 2.2
*
*/
public class ConsumerStoppedEvent extends KafkaEvent {
private static final long serialVersionUID = 1L;
/**
* Reasons for stopping a consumer.
* @since 2.5.9
*
*/
public enum Reason {
/**
* The consumer was stopped because the container was stopped.
*/
NORMAL,
/**
* The transactional producer was fenced and the container
* {@code stopContainerWhenFenced} property is true.
*/
FENCED,
/**
* An authorization exception occurred.
* @since 2.5.10
*/
AUTH,
/**
* No offset found for a partition and no reset policy.
* @since 2.5.10
*/
NO_OFFSET,
/**
* A {@link java.lang.Error} was thrown.
*/
ERROR
}
private final Reason reason;
/**
* Construct an instance with the provided source and container.
* @param source the container instance that generated the event.
* @param container the container or the parent container if the container is a child.
* @param reason the reason.
* @since 2.5.8
*/
public ConsumerStoppedEvent(Object source, Object container, Reason reason) {
super(source, container);
this.reason = reason;
}
/**
* Return the reason why the consumer was stopped.
* @return the reason.
* @since 2.5.8
*/
public Reason getReason() {
return this.reason;
}
@Override
public String toString() {
return "ConsumerStoppedEvent [source=" + getSource() + ", reason=" + this.reason + "]";
}
}
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