spring-batch WorkerConfiguration 源码

spring-batch WorkerConfiguration 代码

文件路径：/spring-batch-samples/src/main/java/org/springframework/batch/sample/remotechunking/WorkerConfiguration.java

/*
 * Copyright 2018-2022 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.batch.sample.remotechunking;

import jakarta.jms.JMSException;
import org.apache.activemq.artemis.jms.client.ActiveMQConnectionFactory;

import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.batch.integration.chunk.RemoteChunkingWorkerBuilder;
import org.springframework.batch.integration.config.annotation.EnableBatchIntegration;
import org.springframework.batch.item.ItemProcessor;
import org.springframework.batch.item.ItemWriter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.PropertySource;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.config.EnableIntegration;
import org.springframework.integration.dsl.IntegrationFlow;
import org.springframework.integration.jms.dsl.Jms;

/**
 * This configuration class is for the worker side of the remote chunking sample. It uses
 * the {@link RemoteChunkingWorkerBuilder} to configure an {@link IntegrationFlow} in
 * order to:
 * <ul>
 * <li>receive requests from the manager</li>
 * <li>process chunks with the configured item processor and writer</li>
 * <li>send replies to the manager</li>
 * </ul>
 *
 * @author Mahmoud Ben Hassine
 */
@Configuration
@EnableBatchProcessing
@EnableBatchIntegration
@EnableIntegration
@PropertySource("classpath:remote-chunking.properties")
@Import(DataSourceConfiguration.class)
public class WorkerConfiguration {

	@Value("${broker.url}")
	private String brokerUrl;

	@Autowired
	private RemoteChunkingWorkerBuilder<Integer, Integer> remoteChunkingWorkerBuilder;

	@Bean
	public ActiveMQConnectionFactory connectionFactory() throws JMSException {
		ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory();
		connectionFactory.setBrokerURL(this.brokerUrl);
		return connectionFactory;
	}

	/*
	 * Configure inbound flow (requests coming from the manager)
	 */
	@Bean
	public DirectChannel requests() {
		return new DirectChannel();
	}

	@Bean
	public IntegrationFlow inboundFlow(ActiveMQConnectionFactory connectionFactory) {
		return IntegrationFlow.from(Jms.messageDrivenChannelAdapter(connectionFactory).destination("requests"))
				.channel(requests()).get();
	}

	/*
	 * Configure outbound flow (replies going to the manager)
	 */
	@Bean
	public DirectChannel replies() {
		return new DirectChannel();
	}

	@Bean
	public IntegrationFlow outboundFlow(ActiveMQConnectionFactory connectionFactory) {
		return IntegrationFlow.from(replies()).handle(Jms.outboundAdapter(connectionFactory).destination("replies"))
				.get();
	}

	/*
	 * Configure worker components
	 */
	@Bean
	public ItemProcessor<Integer, Integer> itemProcessor() {
		return item -> {
			System.out.println("processing item " + item);
			return item;
		};
	}

	@Bean
	public ItemWriter<Integer> itemWriter() {
		return items -> {
			for (Integer item : items) {
				System.out.println("writing item " + item);
			}
		};
	}

	@Bean
	public IntegrationFlow workerIntegrationFlow() {
		return this.remoteChunkingWorkerBuilder.itemProcessor(itemProcessor()).itemWriter(itemWriter())
				.inputChannel(requests()).outputChannel(replies()).build();
	}

}

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