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.beam.sdk.transformservice;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.io.InputStream;
  import org.apache.beam.sdk.options.Default;
  import org.apache.beam.sdk.options.DefaultValueFactory;
  import org.apache.beam.sdk.options.Description;
  import org.apache.beam.sdk.options.PipelineOptions;
  
  public interface TransformServiceOptions extends PipelineOptions {
  
    @Description("Port for running the transform service.")
    int getPort();
  
    void setPort(int port);
  
    @Description("Transform service configuration file.")
    String getTransformServiceConfigFile();
  
    void setTransformServiceConfigFile(String configFile);
  
    @Description("Transform service configuration.")
    @Default.InstanceFactory(TransformServiceConfigFactory.class)
    TransformServiceConfig getTransformServiceConfig();
  
    void setTransformServiceConfig(TransformServiceConfig configFile);
  
    /** Loads the TransformService config. */
    class TransformServiceConfigFactory implements DefaultValueFactory<TransformServiceConfig> {
  
      @Override
      public TransformServiceConfig create(PipelineOptions options) {
        String configFile = options.as(TransformServiceOptions.class).getTransformServiceConfigFile();
        if (configFile != null) {
          File configFileObj = new File(configFile);
          if (!configFileObj.exists()) {
            throw new IllegalArgumentException("Config file " + configFile + " does not exist");
          }
          try (InputStream stream = new FileInputStream(configFileObj)) {
            return TransformServiceConfig.parseFromYamlStream(stream);
          } catch (FileNotFoundException e) {
            throw new RuntimeException(
                "Could not parse the provided Transform Service config file " + configFile, e);
          } catch (IOException e) {
            throw new RuntimeException(
                "Could not parse the provided Transform Service config file " + configFile, e);
          }
        }
  
        return TransformServiceConfig.empty();
      }
    }
  }
  