content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * 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
   *
   * https://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.agrona.concurrent;
  
  import org.agrona.ErrorHandler;
  import org.agrona.concurrent.status.AtomicCounter;
  
  import java.util.Objects;
  
  /**
   * An {@link ErrorHandler} which calls {@link AtomicCounter#increment()} before delegating the exception.
   */
  public class CountedErrorHandler implements ErrorHandler, AutoCloseable
  {
      private final ErrorHandler errorHandler;
      private final AtomicCounter errorCounter;
      private volatile boolean isClosed;
  
      /**
       * Construct a counted error handler with a delegate and counter.
       *
       * @param errorHandler to delegate to.
       * @param errorCounter to increment before delegation.
       */
      public CountedErrorHandler(final ErrorHandler errorHandler, final AtomicCounter errorCounter)
      {
          Objects.requireNonNull(errorHandler, "errorHandler");
          Objects.requireNonNull(errorCounter, "errorCounter");
  
          this.errorHandler = errorHandler;
          this.errorCounter = errorCounter;
      }
  
      /**
       * Close so that {@link #onError(Throwable)} will not delegate and instead print to {@link System#err}.
       */
      public void close()
      {
          isClosed = true;
      }
  
      /**
       * Has this instance been closed.
       *
       * @return true if {@link #close()} has previously been called, otherwise false.
       */
      public boolean isClosed()
      {
          return isClosed;
      }
  
      /**
       * {@inheritDoc}
       */
      public void onError(final Throwable throwable)
      {
          if (isClosed)
          {
              throwable.printStackTrace(System.err);
          }
          else
          {
              if (!errorCounter.isClosed())
              {
                  errorCounter.increment();
              }
  
              errorHandler.onError(throwable);
          }
      }
  }
  