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.expansion.service;
  
  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.expansion.service.JavaClassLookupTransformProvider.AllowList;
  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;
  
  /** Options used to configure the {@link ExpansionService}. */
  public interface ExpansionServiceOptions extends PipelineOptions {
  
    @Description("Allow list for Java class based transform expansion")
    @Default.InstanceFactory(JavaClassLookupAllowListFactory.class)
    AllowList getJavaClassLookupAllowlist();
  
    void setJavaClassLookupAllowlist(AllowList file);
  
    @Description(
        "Allow list file for Java class based transform expansion, or '*' to allow anything.")
    String getJavaClassLookupAllowlistFile();
  
    void setJavaClassLookupAllowlistFile(String file);
  
    @Description("Whether to also start a loopback worker as part of this service.")
    boolean getAlsoStartLoopbackWorker();
  
    void setAlsoStartLoopbackWorker(boolean value);
  
    @Description("Expansion service configuration file.")
    String getExpansionServiceConfigFile();
  
    void setExpansionServiceConfigFile(String configFile);
  
    @Description("Expansion service configuration.")
    @Default.InstanceFactory(ExpansionServiceConfigFactory.class)
    ExpansionServiceConfig getExpansionServiceConfig();
  
    void setExpansionServiceConfig(ExpansionServiceConfig configFile);
  
    @Description("Starts an Expansion Service with support for gRPC ALTS authentication.")
    @Default.Boolean(false)
    boolean getUseAltsServer();
  
    void setUseAltsServer(boolean useAltsServer);
  
    /**
     * Loads the allow list from {@link #getJavaClassLookupAllowlistFile}, defaulting to an empty
     * {@link JavaClassLookupTransformProvider.AllowList}.
     */
    class JavaClassLookupAllowListFactory implements DefaultValueFactory<AllowList> {
  
      @Override
      public AllowList create(PipelineOptions options) {
        String allowListFile =
            options.as(ExpansionServiceOptions.class).getJavaClassLookupAllowlistFile();
        if (allowListFile != null) {
          if (allowListFile.equals("*")) {
            return AllowList.everything();
          }
          File allowListFileObj = new File(allowListFile);
          if (!allowListFileObj.exists()) {
            throw new IllegalArgumentException(
                "Allow list file " + allowListFile + " does not exist");
          }
          try (InputStream stream = new FileInputStream(allowListFileObj)) {
            return AllowList.parseFromYamlStream(stream);
          } catch (FileNotFoundException e) {
            throw new RuntimeException(
                "Could not parse the provided allowlist file " + allowListFile, e);
          } catch (IOException e) {
            throw new RuntimeException(
                "Could not parse the provided allowlist file " + allowListFile, e);
          }
        }
  
        // By default produces an empty allow-list.
        return AllowList.nothing();
      }
    }
  
    /** Loads the ExpansionService config. */
    class ExpansionServiceConfigFactory implements DefaultValueFactory<ExpansionServiceConfig> {
  
      @Override
      public ExpansionServiceConfig create(PipelineOptions options) {
        String configFile = options.as(ExpansionServiceOptions.class).getExpansionServiceConfigFile();
        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 ExpansionServiceConfig.parseFromYamlStream(stream);
          } catch (FileNotFoundException e) {
            throw new RuntimeException(
                "Could not parse the provided Expansion Service config file" + configFile, e);
          } catch (IOException e) {
            throw new RuntimeException(
                "Could not parse the provided Expansion Service config file" + configFile, e);
          }
        }
  
        // By default produces null.
        return ExpansionServiceConfig.empty();
      }
    }
  }
  