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

Example 1 with LoopStartStateImpl

use of io.seata.saga.statelang.domain.impl.LoopStartStateImpl in project seata by seata.

the class TaskStateRouter method route.

@Override
public Instruction route(ProcessContext context, State state) throws EngineExecutionException {
    StateInstruction stateInstruction = context.getInstruction(StateInstruction.class);
    if (stateInstruction.isEnd()) {
        if (LOGGER.isInfoEnabled()) {
            LOGGER.info("StateInstruction is ended, Stop the StateMachine executing. StateMachine[{}] Current State[{}]", stateInstruction.getStateMachineName(), state.getName());
        }
        return null;
    }
    // check if in loop async condition
    if (Boolean.TRUE.equals(context.getVariable(DomainConstants.VAR_NAME_IS_LOOP_STATE))) {
        return null;
    }
    // The current CompensationTriggerState can mark the compensation process is started and perform compensation
    // route processing.
    State compensationTriggerState = (State) context.getVariable(DomainConstants.VAR_NAME_CURRENT_COMPEN_TRIGGER_STATE);
    if (compensationTriggerState != null) {
        return compensateRoute(context, compensationTriggerState);
    }
    // There is an exception route, indicating that an exception is thrown, and the exception route is prioritized.
    String next = (String) context.getVariable(DomainConstants.VAR_NAME_CURRENT_EXCEPTION_ROUTE);
    if (StringUtils.hasLength(next)) {
        context.removeVariable(DomainConstants.VAR_NAME_CURRENT_EXCEPTION_ROUTE);
    } else {
        next = state.getNext();
    }
    // If next is empty, the state selected by the Choice state was taken.
    if (!StringUtils.hasLength(next) && context.hasVariable(DomainConstants.VAR_NAME_CURRENT_CHOICE)) {
        next = (String) context.getVariable(DomainConstants.VAR_NAME_CURRENT_CHOICE);
        context.removeVariable(DomainConstants.VAR_NAME_CURRENT_CHOICE);
    }
    if (!StringUtils.hasLength(next)) {
        return null;
    }
    StateMachine stateMachine = state.getStateMachine();
    State nextState = stateMachine.getState(next);
    if (nextState == null) {
        throw new EngineExecutionException("Next state[" + next + "] is not exits", FrameworkErrorCode.ObjectNotExists);
    }
    stateInstruction.setStateName(next);
    if (null != LoopTaskUtils.getLoopConfig(context, nextState)) {
        stateInstruction.setTemporaryState(new LoopStartStateImpl());
    }
    return stateInstruction;
}

Example 2 with LoopStartStateImpl

use of io.seata.saga.statelang.domain.impl.LoopStartStateImpl in project seata by seata.

the class ProcessCtrlStateMachineEngine method forwardInternal.

protected StateMachineInstance forwardInternal(String stateMachineInstId, Map<String, Object> replaceParams, boolean skip, boolean async, AsyncCallback callback) throws EngineExecutionException {
    StateMachineInstance stateMachineInstance = reloadStateMachineInstance(stateMachineInstId);
    if (stateMachineInstance == null) {
        throw new ForwardInvalidException("StateMachineInstance is not exits", FrameworkErrorCode.StateMachineInstanceNotExists);
    }
    if (ExecutionStatus.SU.equals(stateMachineInstance.getStatus()) && stateMachineInstance.getCompensationStatus() == null) {
        return stateMachineInstance;
    }
    ExecutionStatus[] acceptStatus = new ExecutionStatus[] { ExecutionStatus.FA, ExecutionStatus.UN, ExecutionStatus.RU };
    checkStatus(stateMachineInstance, acceptStatus, null, stateMachineInstance.getStatus(), null, "forward");
    List<StateInstance> actList = stateMachineInstance.getStateList();
    if (CollectionUtils.isEmpty(actList)) {
        throw new ForwardInvalidException("StateMachineInstance[id:" + stateMachineInstId + "] has no stateInstance, pls start a new StateMachine execution instead", FrameworkErrorCode.OperationDenied);
    }
    StateInstance lastForwardState = findOutLastForwardStateInstance(actList);
    if (lastForwardState == null) {
        throw new ForwardInvalidException("StateMachineInstance[id:" + stateMachineInstId + "] Cannot find last forward execution stateInstance", FrameworkErrorCode.OperationDenied);
    }
    ProcessContextBuilder contextBuilder = ProcessContextBuilder.create().withProcessType(ProcessType.STATE_LANG).withOperationName(DomainConstants.OPERATION_NAME_FORWARD).withAsyncCallback(callback).withStateMachineInstance(stateMachineInstance).withStateInstance(lastForwardState).withStateMachineConfig(getStateMachineConfig()).withStateMachineEngine(this);
    contextBuilder.withIsAsyncExecution(async);
    ProcessContext context = contextBuilder.build();
    Map<String, Object> contextVariables = getStateMachineContextVariables(stateMachineInstance);
    if (replaceParams != null) {
        contextVariables.putAll(replaceParams);
    }
    putBusinesskeyToContextariables(stateMachineInstance, contextVariables);
    ConcurrentHashMap<String, Object> concurrentContextVariables = new ConcurrentHashMap<>(contextVariables.size());
    nullSafeCopy(contextVariables, concurrentContextVariables);
    context.setVariable(DomainConstants.VAR_NAME_STATEMACHINE_CONTEXT, concurrentContextVariables);
    stateMachineInstance.setContext(concurrentContextVariables);
    String originStateName = EngineUtils.getOriginStateName(lastForwardState);
    State lastState = stateMachineInstance.getStateMachine().getState(originStateName);
    Loop loop = LoopTaskUtils.getLoopConfig(context, lastState);
    if (null != loop && ExecutionStatus.SU.equals(lastForwardState.getStatus())) {
        lastForwardState = LoopTaskUtils.findOutLastNeedForwardStateInstance(context);
    }
    context.setVariable(lastForwardState.getName() + DomainConstants.VAR_NAME_RETRIED_STATE_INST_ID, lastForwardState.getId());
    if (DomainConstants.STATE_TYPE_SUB_STATE_MACHINE.equals(lastForwardState.getType()) && !ExecutionStatus.SU.equals(lastForwardState.getCompensationStatus())) {
        context.setVariable(DomainConstants.VAR_NAME_IS_FOR_SUB_STATMACHINE_FORWARD, true);
    }
    if (!ExecutionStatus.SU.equals(lastForwardState.getStatus())) {
        lastForwardState.setIgnoreStatus(true);
    }
    try {
        StateInstruction inst = new StateInstruction();
        inst.setTenantId(stateMachineInstance.getTenantId());
        inst.setStateMachineName(stateMachineInstance.getStateMachine().getName());
        if (skip || ExecutionStatus.SU.equals(lastForwardState.getStatus())) {
            String next = null;
            State state = stateMachineInstance.getStateMachine().getState(EngineUtils.getOriginStateName(lastForwardState));
            if (state != null && state instanceof AbstractTaskState) {
                next = ((AbstractTaskState) state).getNext();
            }
            if (StringUtils.isEmpty(next)) {
                LOGGER.warn("Last Forward execution StateInstance was succeed, and it has not Next State , skip forward " + "operation");
                return stateMachineInstance;
            }
            inst.setStateName(next);
        } else {
            if (ExecutionStatus.RU.equals(lastForwardState.getStatus()) && !EngineUtils.isTimeout(lastForwardState.getGmtStarted(), stateMachineConfig.getServiceInvokeTimeout())) {
                throw new EngineExecutionException("State [" + lastForwardState.getName() + "] is running, operation[forward] denied", FrameworkErrorCode.OperationDenied);
            }
            inst.setStateName(EngineUtils.getOriginStateName(lastForwardState));
        }
        context.setInstruction(inst);
        stateMachineInstance.setStatus(ExecutionStatus.RU);
        stateMachineInstance.setRunning(true);
        if (LOGGER.isInfoEnabled()) {
            LOGGER.info("Operation [forward] started  stateMachineInstance[id:" + stateMachineInstance.getId() + "]");
        }
        if (stateMachineInstance.getStateMachine().isPersist()) {
            stateMachineConfig.getStateLogStore().recordStateMachineRestarted(stateMachineInstance, context);
        }
        loop = LoopTaskUtils.getLoopConfig(context, inst.getState(context));
        if (null != loop) {
            inst.setTemporaryState(new LoopStartStateImpl());
        }
        if (async) {
            stateMachineConfig.getAsyncProcessCtrlEventPublisher().publish(context);
        } else {
            stateMachineConfig.getProcessCtrlEventPublisher().publish(context);
        }
    } catch (EngineExecutionException e) {
        LOGGER.error("Operation [forward] failed", e);
        throw e;
    }
    return stateMachineInstance;
}

Example 3 with LoopStartStateImpl

use of io.seata.saga.statelang.domain.impl.LoopStartStateImpl in project seata by seata.

the class ProcessCtrlStateMachineEngine method startInternal.

private StateMachineInstance startInternal(String stateMachineName, String tenantId, String businessKey, Map<String, Object> startParams, boolean async, AsyncCallback callback) throws EngineExecutionException {
    if (async && !stateMachineConfig.isEnableAsync()) {
        throw new EngineExecutionException("Asynchronous start is disabled. please set StateMachineConfig.enableAsync=true first.", FrameworkErrorCode.AsynchronousStartDisabled);
    }
    if (StringUtils.isEmpty(tenantId)) {
        tenantId = stateMachineConfig.getDefaultTenantId();
    }
    StateMachineInstance instance = createMachineInstance(stateMachineName, tenantId, businessKey, startParams);
    ProcessContextBuilder contextBuilder = ProcessContextBuilder.create().withProcessType(ProcessType.STATE_LANG).withOperationName(DomainConstants.OPERATION_NAME_START).withAsyncCallback(callback).withInstruction(new StateInstruction(stateMachineName, tenantId)).withStateMachineInstance(instance).withStateMachineConfig(getStateMachineConfig()).withStateMachineEngine(this);
    Map<String, Object> contextVariables;
    if (startParams != null) {
        contextVariables = new ConcurrentHashMap<>(startParams.size());
        nullSafeCopy(startParams, contextVariables);
    } else {
        contextVariables = new ConcurrentHashMap<>();
    }
    instance.setContext(contextVariables);
    contextBuilder.withStateMachineContextVariables(contextVariables);
    contextBuilder.withIsAsyncExecution(async);
    ProcessContext processContext = contextBuilder.build();
    if (instance.getStateMachine().isPersist() && stateMachineConfig.getStateLogStore() != null) {
        stateMachineConfig.getStateLogStore().recordStateMachineStarted(instance, processContext);
    }
    if (StringUtils.isEmpty(instance.getId())) {
        instance.setId(stateMachineConfig.getSeqGenerator().generate(DomainConstants.SEQ_ENTITY_STATE_MACHINE_INST));
    }
    StateInstruction stateInstruction = processContext.getInstruction(StateInstruction.class);
    Loop loop = LoopTaskUtils.getLoopConfig(processContext, stateInstruction.getState(processContext));
    if (null != loop) {
        stateInstruction.setTemporaryState(new LoopStartStateImpl());
    }
    if (async) {
        stateMachineConfig.getAsyncProcessCtrlEventPublisher().publish(processContext);
    } else {
        stateMachineConfig.getProcessCtrlEventPublisher().publish(processContext);
    }
    return instance;
}