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.arrow.flight.integration.tests;
  
  import java.util.HashMap;
  import java.util.Map;
  import org.apache.arrow.flight.CloseSessionRequest;
  import org.apache.arrow.flight.CloseSessionResult;
  import org.apache.arrow.flight.FlightRuntimeException;
  import org.apache.arrow.flight.FlightServerMiddleware;
  import org.apache.arrow.flight.GetSessionOptionsRequest;
  import org.apache.arrow.flight.GetSessionOptionsResult;
  import org.apache.arrow.flight.ServerSessionMiddleware;
  import org.apache.arrow.flight.SessionOptionValue;
  import org.apache.arrow.flight.SessionOptionValueFactory;
  import org.apache.arrow.flight.SetSessionOptionsRequest;
  import org.apache.arrow.flight.SetSessionOptionsResult;
  import org.apache.arrow.flight.sql.NoOpFlightSqlProducer;
  
  /**
   * The server used for testing Sessions.
   *
   * <p>SetSessionOptions(), GetSessionOptions(), and CloseSession() operate on a simple
   * SessionOptionValue store.
   */
  final class SessionOptionsProducer extends NoOpFlightSqlProducer {
    private static final SessionOptionValue invalidOptionValue =
        SessionOptionValueFactory.makeSessionOptionValue("lol_invalid");
    private final FlightServerMiddleware.Key<ServerSessionMiddleware> sessionMiddlewareKey;
  
    SessionOptionsProducer(FlightServerMiddleware.Key<ServerSessionMiddleware> sessionMiddlewareKey) {
      this.sessionMiddlewareKey = sessionMiddlewareKey;
    }
  
    @Override
    public void setSessionOptions(
        SetSessionOptionsRequest request,
        CallContext context,
        StreamListener<SetSessionOptionsResult> listener) {
      Map<String, SetSessionOptionsResult.Error> errors = new HashMap();
  
      ServerSessionMiddleware middleware = context.getMiddleware(sessionMiddlewareKey);
      ServerSessionMiddleware.Session session = middleware.getSession();
      for (Map.Entry<String, SessionOptionValue> entry : request.getSessionOptions().entrySet()) {
        // Blacklisted option name
        if (entry.getKey().equals("lol_invalid")) {
          errors.put(
              entry.getKey(),
              new SetSessionOptionsResult.Error(SetSessionOptionsResult.ErrorValue.INVALID_NAME));
          continue;
        }
        // Blacklisted option value
        // Recommend using a visitor to check polymorphic equality, but this check is easy
        if (entry.getValue().equals(invalidOptionValue)) {
          errors.put(
              entry.getKey(),
              new SetSessionOptionsResult.Error(SetSessionOptionsResult.ErrorValue.INVALID_VALUE));
          continue;
        }
        // Business as usual:
        if (entry.getValue().isEmpty()) {
          session.eraseSessionOption(entry.getKey());
          continue;
        }
        session.setSessionOption(entry.getKey(), entry.getValue());
      }
      listener.onNext(new SetSessionOptionsResult(errors));
      listener.onCompleted();
    }
  
    @Override
    public void getSessionOptions(
        GetSessionOptionsRequest request,
        CallContext context,
        StreamListener<GetSessionOptionsResult> listener) {
      ServerSessionMiddleware middleware = context.getMiddleware(sessionMiddlewareKey);
      final Map<String, SessionOptionValue> sessionOptions =
          middleware.getSession().getSessionOptions();
      listener.onNext(new GetSessionOptionsResult(sessionOptions));
      listener.onCompleted();
    }
  
    @Override
    public void closeSession(
        CloseSessionRequest request,
        CallContext context,
        StreamListener<CloseSessionResult> listener) {
      ServerSessionMiddleware middleware = context.getMiddleware(sessionMiddlewareKey);
      try {
        middleware.closeSession();
      } catch (FlightRuntimeException fre) {
        listener.onError(fre);
        return;
      }
      listener.onNext(new CloseSessionResult(CloseSessionResult.Status.CLOSED));
      listener.onCompleted();
    }
  }
  