/*
    * 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.logging.log4j.core.async;
  
  import com.lmax.disruptor.ExceptionHandler;
  
  /**
   * Default disruptor exception handler for errors that occur in the AsyncLogger background thread.
   */
  public class AsyncLoggerConfigDefaultExceptionHandler
          implements ExceptionHandler<AsyncLoggerConfigDisruptor.Log4jEventWrapper> {
  
      @Override
      public void handleEventException(final Throwable throwable, final long sequence,
              final AsyncLoggerConfigDisruptor.Log4jEventWrapper event) {
          final StringBuilder sb = new StringBuilder(512);
          sb.append("AsyncLogger error handling event seq=").append(sequence).append(", value='");
          try {
              sb.append(event);
          } catch (final Exception ignored) {
              sb.append("[ERROR calling ").append(event.getClass()).append(".toString(): ");
              sb.append(ignored).append("]");
          }
          sb.append("':");
          System.err.println(sb);
          throwable.printStackTrace();
      }
  
      @Override
      public void handleOnStartException(final Throwable throwable) {
          System.err.println("AsyncLogger error starting:");
          throwable.printStackTrace();
      }
  
      @Override
      public void handleOnShutdownException(final Throwable throwable) {
          System.err.println("AsyncLogger error shutting down:");
          throwable.printStackTrace();
      }
  }