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PluginServiceManager.java
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PluginServiceManager.java
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/*
* Copyright (C) 2021-2021 Huawei Technologies Co., Ltd. All rights reserved.
*
* 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
*
* 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 io.sermant.core.plugin.service;
import io.sermant.core.common.LoggerFactory;
import io.sermant.core.event.collector.FrameworkEventCollector;
import io.sermant.core.plugin.Plugin;
import io.sermant.core.service.ServiceManager;
import io.sermant.core.utils.KeyGenerateUtils;
import java.util.ServiceLoader;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Plugin service manager, a specialization of the core service manager {@link ServiceManager} to initialize {@link
* PluginService}
*
* @author HapThorin
* @version 1.0.0
* @since 2021-11-12
*/
public class PluginServiceManager extends ServiceManager {
private static final Logger LOGGER = LoggerFactory.getLogger();
private PluginServiceManager() {
super();
}
/**
* Initialize plugin services
*
* @param plugin plugin
*/
public static void initPluginServices(Plugin plugin) {
ClassLoader classLoader =
plugin.getServiceClassLoader() != null ? plugin.getServiceClassLoader() : plugin.getPluginClassLoader();
for (PluginService service : ServiceLoader.load(PluginService.class, classLoader)) {
if (loadService(service, service.getClass(), PluginService.class)) {
try {
String pluginServiceKey = KeyGenerateUtils.generateClassKeyWithClassLoader(service.getClass());
service.start();
plugin.getServices().add(pluginServiceKey);
} catch (Exception ex) {
LOGGER.log(Level.SEVERE, "Error occurs while starting plugin service: " + service.getClass(), ex);
}
}
}
FrameworkEventCollector.getInstance().collectServiceStartEvent(plugin.getServices().toString());
}
/**
* Stop plugin services
*
* @param plugin plugin
*/
public static void shutdownPluginServices(Plugin plugin) {
for (String serviceName : plugin.getServices()) {
stopService(serviceName);
}
}
/**
* Get plugin service
*
* @param serviceClass Plugin service class
* @param <T> Plugin service type
* @return Plugin service instance
*/
public static <T extends PluginService> T getPluginService(Class<T> serviceClass) {
return getService(serviceClass);
}
}