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.camel.component.stub;
  
  import org.apache.camel.AsyncCallback;
  import org.apache.camel.Exchange;
  import org.apache.camel.ExchangePattern;
  import org.apache.camel.WaitForTaskToComplete;
  import org.apache.camel.component.seda.QueueReference;
  import org.apache.camel.component.seda.SedaEndpoint;
  import org.apache.camel.component.seda.SedaProducer;
  
  public class StubProducer extends SedaProducer {
  
      public StubProducer(SedaEndpoint endpoint, WaitForTaskToComplete waitForTaskToComplete, long timeout,
                          boolean blockWhenFull, boolean discardWhenFull, long offerTimeout) {
          super(endpoint, waitForTaskToComplete, timeout, blockWhenFull, discardWhenFull, offerTimeout);
      }
  
      @Override
      public StubEndpoint getEndpoint() {
          return (StubEndpoint) super.getEndpoint();
      }
  
      @Override
      public boolean process(Exchange exchange, AsyncCallback callback) {
          AsyncCallback cb = callback;
  
          QueueReference queueReference = getEndpoint().getQueueReference();
          boolean empty = queueReference == null || !queueReference.hasConsumers();
  
          // if no consumers then use InOnly mode
          final ExchangePattern pattern = exchange.getPattern();
          if (empty && pattern != ExchangePattern.InOnly) {
              exchange.setPattern(ExchangePattern.InOnly);
              cb = doneSync -> {
                  // and restore the old pattern after processing
                  exchange.setPattern(pattern);
                  callback.done(doneSync);
              };
          }
  
          return super.process(exchange, cb);
      }
  
  }
  