| /* |
| * 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.servicecomb.config.center.client; |
| |
| import java.util.Map; |
| |
| import org.apache.servicecomb.config.center.client.model.ConfigCenterConfiguration; |
| import org.apache.servicecomb.config.center.client.model.QueryConfigurationsRequest; |
| import org.apache.servicecomb.config.center.client.model.QueryConfigurationsResponse; |
| import org.apache.servicecomb.config.common.ConfigConverter; |
| import org.apache.servicecomb.config.common.ConfigurationChangedEvent; |
| import org.apache.servicecomb.http.client.task.AbstractTask; |
| import org.apache.servicecomb.http.client.task.Task; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.eventbus.EventBus; |
| |
| public class ConfigCenterManager extends AbstractTask { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(ConfigCenterManager.class); |
| |
| private final ConfigCenterClient configCenterClient; |
| |
| private final EventBus eventBus; |
| |
| private QueryConfigurationsRequest queryConfigurationsRequest; |
| |
| private final ConfigConverter configConverter; |
| |
| private final ConfigCenterConfiguration configCenterConfiguration; |
| |
| public ConfigCenterManager(ConfigCenterClient configCenterClient, EventBus eventBus, |
| ConfigConverter configConverter, ConfigCenterConfiguration configCenterConfiguration) { |
| super("config-center-configuration-task"); |
| this.configCenterClient = configCenterClient; |
| this.eventBus = eventBus; |
| this.configConverter = configConverter; |
| this.configCenterConfiguration = configCenterConfiguration; |
| } |
| |
| public void setQueryConfigurationsRequest(QueryConfigurationsRequest queryConfigurationsRequest) { |
| this.queryConfigurationsRequest = queryConfigurationsRequest; |
| } |
| |
| public void startConfigCenterManager() { |
| this.startTask(new PollConfigurationTask(0)); |
| } |
| |
| class PollConfigurationTask implements Task { |
| int failCount; |
| |
| public PollConfigurationTask(int failCount) { |
| this.failCount = failCount; |
| } |
| |
| @Override |
| public void execute() { |
| try { |
| QueryConfigurationsResponse response = configCenterClient.queryConfigurations(queryConfigurationsRequest); |
| if (response.isChanged()) { |
| queryConfigurationsRequest.setRevision(response.getRevision()); |
| Map<String, Object> lastData = configConverter.updateData(response.getConfigurations()); |
| ConfigurationChangedEvent event = ConfigurationChangedEvent |
| .createIncremental(configConverter.getCurrentData(), lastData); |
| eventBus.post(event); |
| } |
| startTask(new BackOffSleepTask(configCenterConfiguration.getRefreshIntervalInMillis(), new PollConfigurationTask(0))); |
| } catch (Exception e) { |
| LOGGER.error("get configurations from ConfigCenter failed, and will try again.", e); |
| startTask(new BackOffSleepTask(failCount + 1, new PollConfigurationTask(failCount + 1))); |
| } |
| } |
| } |
| } |