org.apache.rocketmq.client.java.impl.consumer.ConsumeService Maven / Gradle / Ivy
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* 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,
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package org.apache.rocketmq.client.java.impl.consumer;
import org.apache.rocketmq.shaded.com.google.common.util.concurrent.FutureCallback;
import org.apache.rocketmq.shaded.com.google.common.util.concurrent.Futures;
import org.apache.rocketmq.shaded.com.google.common.util.concurrent.ListenableFuture;
import org.apache.rocketmq.shaded.com.google.common.util.concurrent.ListeningExecutorService;
import org.apache.rocketmq.shaded.com.google.common.util.concurrent.MoreExecutors;
import org.apache.rocketmq.shaded.com.google.common.util.concurrent.SettableFuture;
import java.time.Duration;
import java.util.List;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.apache.rocketmq.client.apis.consumer.ConsumeResult;
import org.apache.rocketmq.client.apis.consumer.MessageListener;
import org.apache.rocketmq.client.java.hook.MessageInterceptor;
import org.apache.rocketmq.client.java.message.MessageViewImpl;
import org.apache.rocketmq.client.java.misc.ClientId;
import org.apache.rocketmq.shaded.org.slf4j.Logger;
import org.apache.rocketmq.shaded.org.slf4j.LoggerFactory;
@SuppressWarnings("NullableProblems")
public abstract class ConsumeService {
private static final Logger log = LoggerFactory.getLogger(ConsumeService.class);
protected final ClientId clientId;
private final MessageListener messageListener;
private final ThreadPoolExecutor consumptionExecutor;
private final MessageInterceptor messageInterceptor;
private final ScheduledExecutorService scheduler;
public ConsumeService(ClientId clientId, MessageListener messageListener, ThreadPoolExecutor consumptionExecutor,
MessageInterceptor messageInterceptor, ScheduledExecutorService scheduler) {
this.clientId = clientId;
this.messageListener = messageListener;
this.consumptionExecutor = consumptionExecutor;
this.messageInterceptor = messageInterceptor;
this.scheduler = scheduler;
}
public abstract void consume(ProcessQueue pq, List messageViews);
public ListenableFuture consume(MessageViewImpl messageView) {
return consume(messageView, Duration.ZERO);
}
public ListenableFuture consume(MessageViewImpl messageView, Duration delay) {
final ListeningExecutorService executorService = MoreExecutors.listeningDecorator(consumptionExecutor);
final ConsumeTask task = new ConsumeTask(clientId, messageListener, messageView, messageInterceptor);
// Consume message with no delay.
if (Duration.ZERO.compareTo(delay) >= 0) {
return executorService.submit(task);
}
final SettableFuture future0 = SettableFuture.create();
scheduler.schedule(() -> {
final ListenableFuture future = executorService.submit(task);
Futures.addCallback(future, new FutureCallback() {
@Override
public void onSuccess(ConsumeResult consumeResult) {
future0.set(consumeResult);
}
@Override
public void onFailure(Throwable t) {
// Should never reach here.
log.error("[Bug] Exception raised while submitting scheduled consumption task, clientId={}",
clientId, t);
}
}, MoreExecutors.directExecutor());
}, delay.toNanos(), TimeUnit.NANOSECONDS);
return future0;
}
}