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.utils;
  
  import com.aliyun.odps.commons.transport.HttpStatus;
  import com.aliyun.odps.rest.RestClient;
  import com.aliyun.odps.tunnel.io.TunnelRetryHandler;
  
  import java.util.Random;
  
  public class TableRetryHandler extends TunnelRetryHandler {
  
      private final RetryPolicy slotExceededRetryPolicy;
  
      public TableRetryHandler(RestClient restClient) {
          super(new TableRetryPolicy(restClient), restClient.getRetryLogger());
          this.slotExceededRetryPolicy = new SlotExceededRetryPolicy(restClient);
      }
  
      @Override
      protected RetryPolicy getRetryPolicy(Integer errorCode) {
          if (errorCode == null) {
              return defaultRetryPolicy;
          } else if (errorCode == HttpStatus.FLOW_EXCEEDED) {
              return slotExceededRetryPolicy;
          }
          return defaultRetryPolicy;
      }
  
      static class TableRetryPolicy implements TunnelRetryHandler.RetryPolicy {
  
          protected final int maxRetryTimes;
          protected final long retryWaitTimeInMills;
  
          public TableRetryPolicy(RestClient restClient) {
              this.maxRetryTimes = restClient.getRetryTimes();
              this.retryWaitTimeInMills = (restClient.getRetryWaitTime() > 0 ?
                      restClient.getRetryWaitTime() :
                      restClient.getConnectTimeout() + restClient.getReadTimeout()) * 1000L;
          }
  
          @Override
          public boolean shouldRetry(Exception e, int attempt) {
              if (ExceptionUtils.findThrowableWithMessage(e, "connect timed out").isPresent()
                      && attempt <= maxRetryTimes) {
                  return true;
              }
              return false;
          }
  
          @Override
          public long getRetryWaitTime(int attempt) {
              return retryWaitTimeInMills;
          }
      }
  
      static class SlotExceededRetryPolicy extends TableRetryPolicy {
  
          private final Random rand;
  
          public SlotExceededRetryPolicy(RestClient restClient) {
              super(restClient);
              this.rand = new Random();
          }
  
          @Override
          public boolean shouldRetry(Exception e, int attempt) {
              return attempt <= maxRetryTimes;
          }
  
          @Override
          public long getRetryWaitTime(int attempt) {
              return rand.nextInt((int)retryWaitTimeInMills) + retryWaitTimeInMills;
          }
      }
  }
  