content: /*
   * 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.flink.streaming.connectors.activemq.internal;
  
  import org.slf4j.Logger;
  
  import javax.jms.ExceptionListener;
  import javax.jms.JMSException;
  
  public class AMQExceptionListener implements ExceptionListener {
  
      private final boolean logFailuresOnly;
      private final Logger logger;
      private JMSException exception;
  
      public AMQExceptionListener(Logger logger, boolean logFailuresOnly) {
          this.logger = logger;
          this.logFailuresOnly = logFailuresOnly;
      }
  
      @Override
      public void onException(JMSException e) {
          this.exception = e;
      }
  
      /**
       * Check if the listener received an asynchronous exception. Throws an exception if it was
       * received and if logFailuresOnly was set to true. Resets the state after the call
       * so a single exception can be thrown only once.
       *
       * @throws JMSException if exception was received and logFailuresOnly was set to true.
       */
      public void checkErroneous() throws JMSException {
          if (exception == null) {
              return;
          }
  
          JMSException recordedException = exception;
          exception = null;
          if (logFailuresOnly) {
              logger.error("Received ActiveMQ exception", recordedException);
          } else {
              throw recordedException;
          }
      }
  }
  