com.alibaba.nacos.spring.context.event.config.EventPublishingConfigService 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,
 * 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 com.alibaba.nacos.spring.context.event.config;

import java.util.Properties;
import java.util.concurrent.Executor;

import org.springframework.beans.factory.DisposableBean;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ConfigurableApplicationContext;

import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.listener.Listener;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.spring.context.event.DeferredApplicationEventPublisher;
import com.alibaba.nacos.spring.metadata.NacosServiceMetaData;

/**
 * {@link NacosConfigEvent Event} publishing {@link ConfigService}.
 *
 * @author Mercy
 * @since 0.1.0
 */
public class EventPublishingConfigService
		implements ConfigService, NacosServiceMetaData, DisposableBean {

	private final ConfigService configService;

	private final ApplicationEventPublisher applicationEventPublisher;

	private final Executor executor;

	private final Properties properties;

	public EventPublishingConfigService(ConfigService configService,
			Properties properties, ConfigurableApplicationContext context,
			Executor executor) {
		this.configService = configService;
		this.properties = properties;
		this.applicationEventPublisher = new DeferredApplicationEventPublisher(context);
		this.executor = executor;
	}

	@Override
	public String getConfig(String dataId, String group, long timeoutMs)
			throws NacosException {
		try {
			return configService.getConfig(dataId, group, timeoutMs);
		}
		catch (NacosException e) {
			if (NacosException.SERVER_ERROR == e.getErrCode()) { // timeout error
				publishEvent(new NacosConfigTimeoutEvent(configService, dataId, group,
						timeoutMs, e.getErrMsg()));
			}
			throw e; // re-throw NacosException
		}
	}

	@Override
	public String getConfigAndSignListener(String dataId, String group, long timeoutMs,
			Listener listener) throws NacosException {
		Listener listenerAdapter = new DelegatingEventPublishingListener(configService,
				dataId, group, applicationEventPublisher, executor, listener);
		return configService.getConfigAndSignListener(dataId, group, timeoutMs,
				listenerAdapter);
	}

	/**
	 * Implementation of the new version of support for multiple configuration file type
	 * resolution.
	 *
	 * @param dataId dataId
	 * @param group group
	 * @param type config's type
	 * @param listener listener
	 * @throws NacosException NacosException
	 */
	public void addListener(String dataId, String group, String type, Listener listener)
			throws NacosException {
		Listener listenerAdapter = new DelegatingEventPublishingListener(configService,
				dataId, group, type, applicationEventPublisher, executor, listener);
		addListener(dataId, group, listenerAdapter);
	}

	@Override
	public void addListener(String dataId, String group, Listener listener)
			throws NacosException {
		configService.addListener(dataId, group, listener);
		publishEvent(new NacosConfigListenerRegisteredEvent(configService, dataId, group,
				listener, true));
	}

	@Override
	public boolean publishConfig(String dataId, String group, String content)
			throws NacosException {
		boolean published = configService.publishConfig(dataId, group, content);
		publishEvent(new NacosConfigPublishedEvent(configService, dataId, group, content,
				published));
		return published;
	}
	
	@Override
	public boolean publishConfig(String dataId, String group, String content, String type) throws NacosException {
		boolean published = configService.publishConfig(dataId, group, content, type);
		publishEvent(new NacosConfigPublishedEvent(configService, dataId, group, content,
				published));
		return published;
	}
	
	@Override
	public boolean publishConfigCas(String dataId, String group, String content, String casMd5) throws NacosException {
		boolean published = configService.publishConfigCas(dataId, group, content, casMd5);
		publishEvent(new NacosConfigPublishedEvent(configService, dataId, group, content,
				published));
		return published;
	}
	
	@Override
	public boolean publishConfigCas(String dataId, String group, String content, String casMd5, String type)
			throws NacosException {
		boolean published = configService.publishConfigCas(dataId, group, content, casMd5, type);
		publishEvent(new NacosConfigPublishedEvent(configService, dataId, group, content,
				published));
		return published;
	}
	
	@Override
	public boolean removeConfig(String dataId, String group) throws NacosException {
		boolean removed = configService.removeConfig(dataId, group);
		publishEvent(new NacosConfigRemovedEvent(configService, dataId, group, removed));
		return removed;
	}

	@Override
	public void removeListener(String dataId, String group, Listener listener) {
		configService.removeListener(dataId, group, listener);
		publishEvent(new NacosConfigListenerRegisteredEvent(configService, dataId, group,
				listener, false));
	}

	@Override
	public String getServerStatus() {
		return configService.getServerStatus();
	}

	@Override
	public void shutDown() throws NacosException {
		configService.shutDown();
	}

	private void publishEvent(NacosConfigEvent nacosConfigEvent) {
		applicationEventPublisher.publishEvent(nacosConfigEvent);
	}

	@Override
	public Properties getProperties() {
		return properties;
	}

	/**
	 * Destroy lifecycle method to invoke {@link #shutDown()}
	 * @throws Exception throw exception
	 * @since 1.0.0
	 */
	@Override
	public void destroy() throws Exception {
		shutDown();
	}
}