content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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 com.alibaba.nacos.core.listener;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.SpringApplicationRunListener;
  import org.springframework.boot.context.event.EventPublishingRunListener;
  import org.springframework.context.ConfigurableApplicationContext;
  import org.springframework.core.Ordered;
  import org.springframework.core.env.ConfigurableEnvironment;
  
  import static org.springframework.boot.context.logging.LoggingApplicationListener.CONFIG_PROPERTY;
  import static org.springframework.core.io.ResourceLoader.CLASSPATH_URL_PREFIX;
  
  /**
   * Logging {@link SpringApplicationRunListener} before {@link EventPublishingRunListener} execution
   *
   * @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
   * @since 0.2.2
   */
  public class LoggingSpringApplicationRunListener implements SpringApplicationRunListener, Ordered {
  
      private static final String DEFAULT_NACOS_LOGBACK_LOCATION = CLASSPATH_URL_PREFIX + "META-INF/logback/nacos.xml";
  
      private static final Logger logger = LoggerFactory.getLogger(LoggingSpringApplicationRunListener.class);
  
      private final SpringApplication application;
  
      private final String[] args;
  
      public LoggingSpringApplicationRunListener(SpringApplication application, String[] args) {
          this.application = application;
          this.args = args;
      }
  
      @Override
      public void starting() {
      }
  
      @Override
      public void environmentPrepared(ConfigurableEnvironment environment) {
          if (!environment.containsProperty(CONFIG_PROPERTY)) {
              System.setProperty(CONFIG_PROPERTY, DEFAULT_NACOS_LOGBACK_LOCATION);
              if (logger.isInfoEnabled()) {
                  logger.info("There is no property named \"{}\" in Spring Boot Environment, " +
                          "and whose value is {} will be set into System's Properties", CONFIG_PROPERTY,
                      DEFAULT_NACOS_LOGBACK_LOCATION);
              }
          }
      }
  
      @Override
      public void contextPrepared(ConfigurableApplicationContext context) {
  
      }
  
      @Override
      public void contextLoaded(ConfigurableApplicationContext context) {
  
      }
  
      @Override
      public void started(ConfigurableApplicationContext context) {
  
      }
  
      @Override
      public void running(ConfigurableApplicationContext context) {
  
      }
  
      @Override
      public void failed(ConfigurableApplicationContext context, Throwable exception) {
  
      }
  
      /**
       * Before {@link EventPublishingRunListener}
       *
       * @return HIGHEST_PRECEDENCE
       */
      @Override
      public int getOrder() {
          return HIGHEST_PRECEDENCE;
      }
  }
  