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.quarkus.component.flink.it;
  
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Paths;
  
  import jakarta.enterprise.context.ApplicationScoped;
  import jakarta.inject.Inject;
  import jakarta.ws.rs.Consumes;
  import jakarta.ws.rs.POST;
  import jakarta.ws.rs.Path;
  import jakarta.ws.rs.PathParam;
  import jakarta.ws.rs.Produces;
  import jakarta.ws.rs.core.MediaType;
  import jakarta.ws.rs.core.Response;
  import org.apache.camel.CamelContext;
  import org.apache.camel.ProducerTemplate;
  import org.apache.camel.component.flink.DataSetCallback;
  import org.apache.camel.component.flink.FlinkConstants;
  import org.apache.camel.component.flink.Flinks;
  import org.apache.camel.component.flink.VoidDataStreamCallback;
  import org.apache.flink.api.java.DataSet;
  import org.apache.flink.api.java.ExecutionEnvironment;
  import org.apache.flink.configuration.Configuration;
  import org.apache.flink.streaming.api.datastream.DataStream;
  import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
  import org.jboss.logging.Logger;
  
  @Path("/flink")
  @ApplicationScoped
  public class FlinkResource {
  
      private static final Logger LOG = Logger.getLogger(FlinkResource.class);
  
      private static final String COMPONENT_FLINK = "flink";
  
      @Inject
      CamelContext context;
  
      @Inject
      ProducerTemplate template;
  
      String flinkDataSetUri = "flink:dataSet?dataSet=#myDataSet";
      String flinkDataStreamUri = "flink:datastream?datastream=#myDataStream";
  
      @Path("/dataset/{filePath}")
      @POST
      @Consumes(MediaType.TEXT_PLAIN)
      @Produces(MediaType.TEXT_PLAIN)
      public Response dataSetFromTextFile(@PathParam("filePath") String filePath) {
  
          if (Files.exists(Paths.get(filePath))) {
              ExecutionEnvironment env = Flinks.createExecutionEnvironment();
              env.getConfiguration().setString("io.tmp.dirs", "target");
              DataSet<String> myDataSet = env.readTextFile(filePath);
              context.getRegistry().bind("myDataSet", myDataSet);
              context.getRegistry().bind("countTotal", addDataSetCallback());
              Long totalCount = template.requestBody(
                      flinkDataSetUri + "&dataSetCallback=#countTotal", null, Long.class);
              return Response.ok(totalCount).build();
          }
  
          return Response.status(Response.Status.NOT_FOUND).build();
      }
  
      @Path("/datastream/{filePath}")
      @POST
      @Consumes(MediaType.TEXT_PLAIN)
      @Produces(MediaType.TEXT_PLAIN)
      public Response loadStream(@PathParam("filePath") String filePath, String data) throws IOException {
          java.nio.file.Path path = Paths.get(filePath);
          if (path != null) {
              Configuration configuration = new Configuration();
              configuration.setString("io.tmp.dirs", "target");
              StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(configuration);
              DataStream<String> datastream = env.fromElements(data);
              context.getRegistry().bind("myDataStream", datastream);
              template.sendBodyAndHeader(flinkDataStreamUri, null,
                      FlinkConstants.FLINK_DATASTREAM_CALLBACK_HEADER,
                      new VoidDataStreamCallback() {
                          @Override
                          public void doOnDataStream(DataStream dataStream, Object... objects) throws Exception {
                              dataStream.writeAsText(filePath,
                                      org.apache.flink.core.fs.FileSystem.WriteMode.OVERWRITE);
                              dataStream.getExecutionEnvironment().execute();
                          }
                      });
              return Response.ok(Files.size(path)).build();
          }
          return Response.status(Response.Status.NOT_FOUND).build();
  
      }
  
      DataSetCallback addDataSetCallback() {
          return new DataSetCallback() {
              @Override
              public Object onDataSet(DataSet ds, Object... payloads) {
                  try {
                      return ds.count();
                  } catch (Exception e) {
                      return null;
                  }
              }
          };
      }
  
  }
  