text: /*
   * 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.exec;
  
  import org.apache.camel.Exchange;
  import org.apache.camel.component.exec.impl.DefaultExecCommandExecutor;
  import org.apache.camel.spi.CamelLogger;
  import org.apache.camel.support.DefaultProducer;
  import org.apache.camel.util.ObjectHelper;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Exec producer.
   * 
   * @see {link Producer}
   */
  public class ExecProducer extends DefaultProducer {
  
      private final Logger log;
  
      private final CamelLogger logger;
  
      private final ExecEndpoint endpoint;
  
      public ExecProducer(ExecEndpoint endpoint) {
          super(endpoint);
          this.endpoint = endpoint;
          this.log = LoggerFactory.getLogger(ExecProducer.class);
          this.logger = new CamelLogger(log);
      }
  
      @Override
      public void process(Exchange exchange) throws Exception {
          ExecCommand execCommand = getBinding().readInput(exchange, endpoint);
  
          ExecCommandExecutor executor = endpoint.getCommandExecutor();
          if (executor == null) {
              // create a new non-shared executor
              executor = new DefaultExecCommandExecutor();
          }
  
          logger.log(String.format("Executing %s", execCommand), execCommand.getCommandLogLevel());
  
          ExecResult result = executor.execute(execCommand);
  
          ObjectHelper.notNull(result, "The command executor must return a not-null result");
          logger.log(String.format("The command %s had exit value %s", execCommand, result.getExitValue()),
                  execCommand.getCommandLogLevel());
          if (result.getExitValue() != 0) {
              log.error("The command {} returned exit value {}", execCommand, result.getExitValue());
          }
          getBinding().writeOutput(exchange, result);
      }
  
      private ExecBinding getBinding() {
          return endpoint.getBinding();
      }
  }
  