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.dolphinscheduler.api.executor.workflow.instance.pause.pause;
  
  import org.apache.dolphinscheduler.api.enums.ExecuteType;
  import org.apache.dolphinscheduler.api.executor.ExecuteFunction;
  import org.apache.dolphinscheduler.api.executor.ExecuteRuntimeException;
  import org.apache.dolphinscheduler.common.enums.CommandType;
  import org.apache.dolphinscheduler.common.enums.WorkflowExecutionStatus;
  import org.apache.dolphinscheduler.dao.entity.ProcessInstance;
  import org.apache.dolphinscheduler.dao.repository.ProcessInstanceDao;
  import org.apache.dolphinscheduler.extract.base.client.SingletonJdkDynamicRpcClientProxyFactory;
  import org.apache.dolphinscheduler.extract.master.ITaskInstanceExecutionEventListener;
  import org.apache.dolphinscheduler.extract.master.transportor.WorkflowInstanceStateChangeEvent;
  
  public class PauseExecuteFunction implements ExecuteFunction<PauseExecuteRequest, PauseExecuteResult> {
  
      private final ProcessInstanceDao processInstanceDao;
  
      public PauseExecuteFunction(ProcessInstanceDao processInstanceDao) {
          this.processInstanceDao = processInstanceDao;
      }
  
      @Override
      public PauseExecuteResult execute(PauseExecuteRequest request) throws ExecuteRuntimeException {
          ProcessInstance workflowInstance = request.getWorkflowInstance();
          if (!workflowInstance.getState().isRunning()) {
              throw new ExecuteRuntimeException(
                      String.format("The workflow instance: %s status is %s, can not pause", workflowInstance.getName(),
                              workflowInstance.getState()));
          }
          workflowInstance.setCommandType(CommandType.PAUSE);
          workflowInstance.addHistoryCmd(CommandType.PAUSE);
          workflowInstance.setStateWithDesc(WorkflowExecutionStatus.READY_PAUSE,
                  CommandType.PAUSE.getDescp() + " by " + request.getExecuteUser().getUserName());
  
          if (!processInstanceDao.updateById(workflowInstance)) {
              throw new ExecuteRuntimeException(
                      String.format(
                              "The workflow instance: %s pause failed, due to update the workflow instance status in DB failed",
                              workflowInstance.getName()));
          }
          try {
              // todo: direct call the workflow instance pause method
              ITaskInstanceExecutionEventListener iTaskInstanceExecutionEventListener =
                      SingletonJdkDynamicRpcClientProxyFactory
                              .getProxyClient(workflowInstance.getHost(), ITaskInstanceExecutionEventListener.class);
              iTaskInstanceExecutionEventListener.onWorkflowInstanceInstanceStateChange(
                      new WorkflowInstanceStateChangeEvent(
                              workflowInstance.getId(), 0, workflowInstance.getState(), workflowInstance.getId(), 0));
          } catch (Exception e) {
              throw new ExecuteRuntimeException(
                      String.format(
                              "WorkflowInstance: %s pause failed", workflowInstance.getName()),
                      e);
          }
          return new PauseExecuteResult(workflowInstance);
      }
  
      @Override
      public ExecuteType getExecuteType() {
          return PauseExecuteFunctionBuilder.EXECUTE_TYPE;
      }
  }
  