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.weather;
  
  import org.apache.camel.Exchange;
  import org.apache.camel.support.DefaultProducer;
  import org.apache.camel.util.ObjectHelper;
  import org.apache.hc.client5.http.classic.HttpClient;
  import org.apache.hc.client5.http.classic.methods.HttpGet;
  import org.apache.hc.core5.http.HttpStatus;
  import org.apache.hc.core5.http.io.entity.EntityUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class WeatherProducer extends DefaultProducer {
  
      private static final Logger LOG = LoggerFactory.getLogger(WeatherProducer.class);
  
      private final String query;
  
      public WeatherProducer(WeatherEndpoint endpoint, String query) {
          super(endpoint);
          this.query = query;
      }
  
      @Override
      public WeatherEndpoint getEndpoint() {
          return (WeatherEndpoint) super.getEndpoint();
      }
  
      @Override
      public void process(Exchange exchange) throws Exception {
          String q = query;
          String location = exchange.getIn().getHeader(WeatherConstants.WEATHER_LOCATION, String.class);
          if (location != null) {
              q = getEndpoint().getWeatherQuery().getQuery(location);
          }
  
          HttpClient httpClient = getEndpoint().getConfiguration().getHttpClient();
          String uri = q;
          HttpGet method = new HttpGet(uri);
          httpClient.execute(
                  method,
                  response -> {
                      try {
                          LOG.debug("Going to execute the Weather query {}", uri);
                          if (HttpStatus.SC_OK != response.getCode()) {
                              throw new IllegalStateException(
                                      "Got the invalid http status value '" + response.getCode()
                                                              + "' as the result of the query '" + query + "'");
                          }
                          String weather = EntityUtils.toString(response.getEntity(), "UTF-8");
                          LOG.debug("Got back the Weather information {}", weather);
  
                          if (ObjectHelper.isEmpty(weather)) {
                              throw new IllegalStateException(
                                      "Got the unexpected value '" + weather + "' as the result of the query '" + uri + "'");
                          }
  
                          String header = getEndpoint().getConfiguration().getHeaderName();
                          if (header != null) {
                              exchange.getIn().setHeader(header, weather);
                          } else {
                              exchange.getIn().setBody(weather);
                          }
                          exchange.getIn().setHeader(WeatherConstants.WEATHER_QUERY, uri);
                          return null;
                      } finally {
                          method.reset();
                      }
                  });
  
      }
  }
  