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/*
 * Copyright 2021 Google LLC
 *
 * Licensed 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
 *
 *     https://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 com.google.apphosting.runtime;

import com.google.apphosting.utils.config.AppEngineWebXml;
import com.google.common.flogger.GoogleLogger;

/**
 * Performs the diversion of java.net services to use the App Engine Socket api.
 *
 */
public class NetworkServiceDiverter {
  private static final GoogleLogger logger = GoogleLogger.forEnclosingClass();

  public static boolean useNativeUrlStreamHandler(String urlStreamHandlerType) {
    if (urlStreamHandlerType == null) {
      urlStreamHandlerType = AppEngineWebXml.URL_HANDLER_URLFETCH;
    }
    logger.atInfo().log("URL Stream handler diverting type: %s", urlStreamHandlerType);
    switch (urlStreamHandlerType) {
      case AppEngineWebXml.URL_HANDLER_URLFETCH:
        return false;
      case AppEngineWebXml.URL_HANDLER_NATIVE:
        return true;
      default:
        logger.atWarning().log(
            "Unknown URL Stream handler diverting type: %s", urlStreamHandlerType);
        return true;
    }
  }

  private NetworkServiceDiverter() {}
}