content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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
   *
   *     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.activiti.engine.impl.agenda;
  
  import java.util.LinkedList;
  import org.activiti.engine.ActivitiEngineAgenda;
  import org.activiti.engine.impl.interceptor.CommandContext;
  import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
  
  
   */
  public class DefaultActivitiEngineAgenda implements ActivitiEngineAgenda {
  
      private static final Logger logger = LoggerFactory.getLogger(DefaultActivitiEngineAgenda.class);
  
      protected LinkedList<Runnable> operations = new LinkedList<Runnable>();
      protected CommandContext commandContext;
  
      public DefaultActivitiEngineAgenda(CommandContext commandContext) {
          this.commandContext = commandContext;
      }
  
      @Override
      public boolean isEmpty() {
          return operations.isEmpty();
      }
  
      @Override
      public Runnable getNextOperation() {
          return operations.poll();
      }
  
      /**
       * Generic method to plan a {@link Runnable}.
       */
      @Override
      public void planOperation(Runnable operation) {
          operations.add(operation);
  
          if (operation instanceof AbstractOperation) {
              ExecutionEntity execution = ((AbstractOperation) operation).getExecution();
              if (execution != null) {
                  commandContext.addInvolvedExecution(execution);
              }
          }
  
          logger.debug("Operation {} added to agenda", operation.getClass());
      }
  
      @Override
      public void planContinueProcessOperation(ExecutionEntity execution) {
          planOperation(new ContinueProcessOperation(commandContext, execution));
      }
  
      @Override
      public void planContinueProcessSynchronousOperation(ExecutionEntity execution) {
          planOperation(new ContinueProcessOperation(commandContext, execution, true, false));
      }
  
      @Override
      public void planContinueProcessInCompensation(ExecutionEntity execution) {
          planOperation(new ContinueProcessOperation(commandContext, execution, false, true));
      }
  
      @Override
      public void planContinueMultiInstanceOperation(ExecutionEntity execution) {
          planOperation(new ContinueMultiInstanceOperation(commandContext, execution));
      }
  
      @Override
      public void planTakeOutgoingSequenceFlowsOperation(ExecutionEntity execution, boolean evaluateConditions) {
          planOperation(new TakeOutgoingSequenceFlowsOperation(commandContext, execution, evaluateConditions));
      }
  
      @Override
      public void planEndExecutionOperation(ExecutionEntity execution) {
          planOperation(new EndExecutionOperation(commandContext, execution));
      }
  
      @Override
      public void planTriggerExecutionOperation(ExecutionEntity execution) {
          planOperation(new TriggerExecutionOperation(commandContext, execution));
      }
  
      @Override
      public void planDestroyScopeOperation(ExecutionEntity execution) {
          planOperation(new DestroyScopeOperation(commandContext, execution));
      }
  
      @Override
      public void planExecuteInactiveBehaviorsOperation() {
          planOperation(new ExecuteInactiveBehaviorsOperation(commandContext));
      }
  }
  