/*
    * 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.appender;
  
  import java.util.Objects;
  import java.util.concurrent.atomic.AtomicLong;
  
  import org.apache.logging.log4j.core.Appender;
  import org.apache.logging.log4j.core.Core;
  import org.apache.logging.log4j.core.Layout;
  import org.apache.logging.log4j.core.LogEvent;
  import org.apache.logging.log4j.core.config.Property;
  import org.apache.logging.log4j.core.config.plugins.Plugin;
  import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
  import org.apache.logging.log4j.core.config.plugins.PluginFactory;
  
  /**
   * No-Operation Appender that counts events.
   */
  @Plugin(name = "CountingNoOp", category = Core.CATEGORY_NAME, elementType = Appender.ELEMENT_TYPE, printObject = true)
  public class CountingNoOpAppender extends AbstractAppender  {
  
      private final AtomicLong total = new AtomicLong();
  
      public CountingNoOpAppender(final String name, final Layout<?> layout) {
          super(name, null, layout, true, Property.EMPTY_ARRAY);
      }
  
      private CountingNoOpAppender(final String name, final Layout<?> layout, final Property[] properties) {
          super(name, null, layout, true, properties);
      }
  
      public long getCount() {
          return total.get();
      }
  
      @Override
      public void append(final LogEvent event) {
          total.incrementAndGet();
      }
  
      /**
       * Creates a CountingNoOp Appender.
       */
      @PluginFactory
      public static CountingNoOpAppender createAppender(@PluginAttribute("name") final String name) {
          return new CountingNoOpAppender(Objects.requireNonNull(name), null, Property.EMPTY_ARRAY);
      }
  }