kafka NoopApplicationEvent 源码

  • 2022-10-20
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kafka NoopApplicationEvent 代码

文件路径:/clients/src/main/java/org/apache/kafka/clients/consumer/internals/events/NoopApplicationEvent.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *    http://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.apache.kafka.clients.consumer.internals.events;

import org.apache.kafka.clients.consumer.internals.NoopBackgroundEvent;

import java.util.concurrent.BlockingQueue;

/**
 * The event is NoOp. This is intentionally left here for demonstration purpose.
 */
public class NoopApplicationEvent extends ApplicationEvent {
    public final String message;
    private final BlockingQueue<BackgroundEvent> backgroundEventQueue;

    public NoopApplicationEvent(final BlockingQueue<BackgroundEvent> backgroundEventQueue,
                                final String message) {

        this.message = message;
        this.backgroundEventQueue = backgroundEventQueue;
    }

    @Override
    public boolean process() {
        return backgroundEventQueue.add(new NoopBackgroundEvent(message));
    }

    @Override
    public String toString() {
        return getClass() + "_" + this.message;
    }
}

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