Examples with CompensateSubStateMachineState io.seata.saga.statelang.domain.CompensateSubStateMachineState used on opensource projects

Example 1 with CompensateSubStateMachineState

use of io.seata.saga.statelang.domain.CompensateSubStateMachineState in project seata by seata.

the class TaskStateRouter method compensateRoute.

private Instruction compensateRoute(ProcessContext context, State compensationTriggerState) {
    // and the compensation process is interrupted.
    if (Boolean.TRUE.equals(context.getVariable(DomainConstants.VAR_NAME_FIRST_COMPENSATION_STATE_STARTED))) {
        Exception exception = (Exception) context.getVariable(DomainConstants.VAR_NAME_CURRENT_EXCEPTION);
        if (exception != null) {
            EngineUtils.endStateMachine(context);
            return null;
        }
        StateInstance stateInstance = (StateInstance) context.getVariable(DomainConstants.VAR_NAME_STATE_INST);
        if (stateInstance != null && (!ExecutionStatus.SU.equals(stateInstance.getStatus()))) {
            EngineUtils.endStateMachine(context);
            return null;
        }
    }
    Stack<StateInstance> stateStackToBeCompensated = CompensationHolder.getCurrent(context, true).getStateStackNeedCompensation();
    if (!stateStackToBeCompensated.isEmpty()) {
        StateInstance stateToBeCompensated = stateStackToBeCompensated.pop();
        StateMachine stateMachine = (StateMachine) context.getVariable(DomainConstants.VAR_NAME_STATEMACHINE);
        State state = stateMachine.getState(EngineUtils.getOriginStateName(stateToBeCompensated));
        if (state != null && state instanceof AbstractTaskState) {
            AbstractTaskState taskState = (AbstractTaskState) state;
            StateInstruction instruction = context.getInstruction(StateInstruction.class);
            State compensateState = null;
            String compensateStateName = taskState.getCompensateState();
            if (StringUtils.hasLength(compensateStateName)) {
                compensateState = stateMachine.getState(compensateStateName);
            }
            if (compensateState == null && (taskState instanceof SubStateMachine)) {
                compensateState = ((SubStateMachine) taskState).getCompensateStateObject();
                instruction.setTemporaryState(compensateState);
            }
            if (compensateState == null) {
                EngineUtils.endStateMachine(context);
                return null;
            }
            instruction.setStateName(compensateState.getName());
            CompensationHolder.getCurrent(context, true).addToBeCompensatedState(compensateState.getName(), stateToBeCompensated);
            ((HierarchicalProcessContext) context).setVariableLocally(DomainConstants.VAR_NAME_FIRST_COMPENSATION_STATE_STARTED, true);
            if (compensateState instanceof CompensateSubStateMachineState) {
                ((HierarchicalProcessContext) context).setVariableLocally(compensateState.getName() + DomainConstants.VAR_NAME_SUB_MACHINE_PARENT_ID, EngineUtils.generateParentId(stateToBeCompensated));
            }
            return instruction;
        }
    }
    context.removeVariable(DomainConstants.VAR_NAME_CURRENT_COMPEN_TRIGGER_STATE);
    String compensationTriggerStateNext = compensationTriggerState.getNext();
    if (StringUtils.isEmpty(compensationTriggerStateNext)) {
        EngineUtils.endStateMachine(context);
        return null;
    }
    StateInstruction instruction = context.getInstruction(StateInstruction.class);
    instruction.setStateName(compensationTriggerStateNext);
    return instruction;
}

Example 2 with CompensateSubStateMachineState

use of io.seata.saga.statelang.domain.CompensateSubStateMachineState in project seata by seata.

the class ServiceTaskStateHandler method process.

@Override
public void process(ProcessContext context) throws EngineExecutionException {
    StateInstruction instruction = context.getInstruction(StateInstruction.class);
    ServiceTaskStateImpl state = (ServiceTaskStateImpl) instruction.getState(context);
    String serviceName = state.getServiceName();
    String methodName = state.getServiceMethod();
    StateInstance stateInstance = (StateInstance) context.getVariable(DomainConstants.VAR_NAME_STATE_INST);
    Object result;
    try {
        List<Object> input = (List<Object>) context.getVariable(DomainConstants.VAR_NAME_INPUT_PARAMS);
        // Set the current task execution status to RU (Running)
        stateInstance.setStatus(ExecutionStatus.RU);
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug(">>>>>>>>>>>>>>>>>>>>>> Start to execute State[{}], ServiceName[{}], Method[{}], Input:{}", state.getName(), serviceName, methodName, input);
        }
        if (state instanceof CompensateSubStateMachineState) {
            // If it is the compensation of the substate machine,
            // directly call the state machine's compensate method
            result = compensateSubStateMachine(context, state, input, stateInstance, (StateMachineEngine) context.getVariable(DomainConstants.VAR_NAME_STATEMACHINE_ENGINE));
        } else {
            StateMachineConfig stateMachineConfig = (StateMachineConfig) context.getVariable(DomainConstants.VAR_NAME_STATEMACHINE_CONFIG);
            ServiceInvoker serviceInvoker = stateMachineConfig.getServiceInvokerManager().getServiceInvoker(state.getServiceType());
            if (serviceInvoker == null) {
                throw new EngineExecutionException("No such ServiceInvoker[" + state.getServiceType() + "]", FrameworkErrorCode.ObjectNotExists);
            }
            if (serviceInvoker instanceof ApplicationContextAware) {
                ((ApplicationContextAware) serviceInvoker).setApplicationContext(stateMachineConfig.getApplicationContext());
            }
            result = serviceInvoker.invoke(state, input.toArray());
        }
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("<<<<<<<<<<<<<<<<<<<<<< State[{}], ServiceName[{}], Method[{}] Execute finish. result: {}", state.getName(), serviceName, methodName, result);
        }
        if (result != null) {
            stateInstance.setOutputParams(result);
            ((HierarchicalProcessContext) context).setVariableLocally(DomainConstants.VAR_NAME_OUTPUT_PARAMS, result);
        }
    } catch (Throwable e) {
        LOGGER.error("<<<<<<<<<<<<<<<<<<<<<< State[{}], ServiceName[{}], Method[{}] Execute failed.", state.getName(), serviceName, methodName, e);
        ((HierarchicalProcessContext) context).setVariableLocally(DomainConstants.VAR_NAME_CURRENT_EXCEPTION, e);
        EngineUtils.handleException(context, state, e);
    }
}