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 com.aliyun.odps.table.enviroment;
  
  import com.aliyun.odps.Odps;
  import com.aliyun.odps.commons.transport.DefaultTransport;
  import com.aliyun.odps.rest.RestClient;
  
  import java.net.URI;
  import java.net.URISyntaxException;
  
  import static com.aliyun.odps.table.utils.ConfigConstants.*;
  
  public abstract class ExecutionEnvironment {
  
      protected final EnvironmentSettings settings;
  
      private boolean initialized = false;
  
      public ExecutionEnvironment(EnvironmentSettings settings) {
          this.settings = settings;
      }
  
      public static ExecutionEnvironment create(EnvironmentSettings settings) {
          switch (settings.getExecutionMode()) {
              case REMOTE:
                  return new RemoteEnvironment(settings);
              case LOCAL:
                  return new LocalEnvironment(settings);
              case AUTOMATIC:
                  return createDefaultEnvironment(settings);
              default:
                  throw new UnsupportedOperationException();
          }
      }
  
      /**
       * Initialize if not done previously.
       **/
      protected void ensureInitialized() {
          if (!initialized) {
              initialize();
              initialized = true;
          }
      }
  
      abstract protected void initialize();
  
      /**
       * Get service endpoint
       *
       * @return String
       */
      public String getServiceEndpoint() {
          return settings.getServiceEndpoint().orElseThrow(() ->
                  new IllegalStateException("Get empty service endpoint from execution environment!"));
      }
  
      /**
       * Get tunnel endpoint
       *
       * @return String
       */
      abstract public String getTunnelEndpoint(String targetProject);
  
  
      /**
       * Get environment settings
       *
       * @return {@link EnvironmentSettings}.
       */
      public EnvironmentSettings getSettings() {
          return settings;
      }
  
      /**
       * Create http client
       *
       * @return {@link RestClient}.
       */
      public RestClient createHttpClient(String targetProject) {
          ensureInitialized();
  
          Credentials credentials = settings.getCredentials();
          RestClient restClient = new RestClient(new DefaultTransport());
          restClient.setAccount(credentials.getAccount());
          credentials.getAppAccount().ifPresent(restClient::setAppAccount);
          credentials.getAppStsAccount().ifPresent(restClient::setAppStsAccount);
          try {
              URI endpoint = new URI(getTunnelEndpoint(targetProject));
              restClient.setEndpoint(endpoint.toString());
          } catch (URISyntaxException e) {
              throw new IllegalArgumentException(
                      "Execution environment get tunnel endpoint error:" + e.getMessage());
          }
          setRestOptions(restClient);
          return restClient;
      }
  
      /**
       * Create odps client
       *
       * @return {@link Odps}.
       */
      public Odps createOdpsClient() {
          Credentials credentials = settings.getCredentials();
          Odps odps = new Odps(credentials.getAccount());
          settings.getDefaultProject().ifPresent(odps::setDefaultProject);
          settings.getDefaultSchema().ifPresent(odps::setCurrentSchema);
          credentials.getAppAccount().ifPresent(odps::setAppAccount);
          credentials.getAppStsAccount().ifPresent(odps::setAppStsAccount);
          try {
              URI endpoint = new URI(getServiceEndpoint());
              odps.setEndpoint(endpoint.toString());
          } catch (URISyntaxException e) {
              throw new IllegalArgumentException(
                      "Execution environment get service endpoint error:" + e.getMessage());
          }
          setRestOptions(odps.getRestClient());
          return odps;
      }
  
      private void setRestOptions(RestClient restClient) {
          restClient.setUserAgent("StorageAPI");
          settings.getDefaultProject().ifPresent(restClient::setDefaultProject);
          settings.getDefaultSchema().ifPresent(restClient::setCurrentSchema);
          settings.getRestOptions().ifPresent(restOptions -> {
              restOptions.getConnectTimeout().ifPresent(restClient::setConnectTimeout);
              restOptions.getReadTimeout().ifPresent(restClient::setReadTimeout);
              restOptions.getUserAgent().ifPresent(restClient::setUserAgent);
              restOptions.getRetryTimes().ifPresent(restClient::setRetryTimes);
              restOptions.getRetryWaitTimeInSeconds().ifPresent(restClient::setRetryWaitTime);
              restOptions.isIgnoreCerts().ifPresent(restClient::setIgnoreCerts);
          });
      }
  
      private static ExecutionEnvironment createDefaultEnvironment(EnvironmentSettings settings) {
          String mode = System.getenv(MAX_STORAGE_MODE);
          if (MAX_STORAGE_VSHM_MODE.equals(mode) ||
                  MAX_STORAGE_NET_MODE.equals(mode)) {
              return new LocalEnvironment(settings);
          }
          return new RemoteEnvironment(settings);
      }
  }
  