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.cloud.storage.upload;
  
  
  
  import com.cloud.agent.api.storage.UploadAnswer;
  import com.cloud.agent.api.storage.UploadProgressCommand.RequestType;
  import com.cloud.storage.Upload.Status;
  import org.apache.logging.log4j.Level;
  
  public class UploadErrorState extends UploadInactiveState {
  
      public UploadErrorState(UploadListener ul) {
          super(ul);
      }
  
      @Override
      public String handleAnswer(UploadAnswer answer) {
          switch (answer.getUploadStatus()) {
              case UPLOAD_IN_PROGRESS:
                  getUploadListener().scheduleStatusCheck(RequestType.GET_STATUS);
                  return Status.UPLOAD_IN_PROGRESS.toString();
              case UPLOADED:
                  getUploadListener().scheduleImmediateStatusCheck(RequestType.PURGE);
                  getUploadListener().cancelTimeoutTask();
                  return Status.UPLOADED.toString();
              case NOT_UPLOADED:
                  getUploadListener().scheduleStatusCheck(RequestType.GET_STATUS);
                  return Status.NOT_UPLOADED.toString();
              case UPLOAD_ERROR:
                  getUploadListener().cancelStatusTask();
                  getUploadListener().cancelTimeoutTask();
                  return Status.UPLOAD_ERROR.toString();
              case UNKNOWN:
                  getUploadListener().cancelStatusTask();
                  getUploadListener().cancelTimeoutTask();
                  return Status.UPLOAD_ERROR.toString();
              default:
                  return null;
          }
      }
  
      @Override
      public String handleAbort() {
          return Status.ABANDONED.toString();
      }
  
      @Override
      public String getName() {
          return Status.UPLOAD_ERROR.toString();
      }
  
      @Override
      public void onEntry(String prevState, UploadEvent event, Object evtObj) {
          super.onEntry(prevState, event, evtObj);
          if (event == UploadEvent.DISCONNECT) {
              getUploadListener().logDisconnect();
              getUploadListener().cancelStatusTask();
              getUploadListener().cancelTimeoutTask();
              getUploadListener().updateDatabase(Status.UPLOAD_ERROR, "Storage agent or storage VM disconnected");
              getUploadListener().log("Entering upload error state because the storage host disconnected", Level.WARN);
          } else if (event == UploadEvent.TIMEOUT_CHECK) {
              getUploadListener().updateDatabase(Status.UPLOAD_ERROR, "Timeout waiting for response from storage host");
              getUploadListener().log("Entering upload error state: timeout waiting for response from storage host", Level.WARN);
          }
          getUploadListener().setUploadInactive(Status.UPLOAD_ERROR);
      }
  
  }
  