| /* |
| * Copyright 2018-present Open Networking Foundation |
| * |
| * 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.onosproject.workflow.impl; |
| |
| import com.fasterxml.jackson.databind.node.JsonNodeFactory; |
| import com.google.common.collect.Lists; |
| import org.onosproject.cluster.ClusterService; |
| import org.onosproject.cluster.LeadershipService; |
| import org.onosproject.cluster.NodeId; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.store.service.StorageException; |
| import org.onosproject.workflow.api.DefaultWorkplace; |
| import org.onosproject.workflow.api.EventHintSupplier; |
| import org.onosproject.workflow.api.EventTask; |
| import org.onosproject.workflow.api.JsonDataModelInjector; |
| import org.onosproject.workflow.api.JsonDataModelTree; |
| import org.onosproject.workflow.api.ProgramCounter; |
| import org.onosproject.workflow.api.SystemWorkflowContext; |
| import org.onosproject.workflow.api.EventTimeoutTask; |
| import org.onosproject.workflow.api.TimeoutTask; |
| import org.onosproject.workflow.api.TimerChain; |
| import org.onosproject.workflow.api.Worklet; |
| import org.onosproject.workflow.api.Workflow; |
| import org.onosproject.workflow.api.WorkflowContext; |
| import org.onosproject.workflow.api.WorkflowData; |
| import org.onosproject.workflow.api.ContextEventMapStore; |
| import org.onosproject.workflow.api.WorkflowState; |
| import org.onosproject.workflow.api.WorkflowStore; |
| import org.onosproject.workflow.api.WorkflowBatchDelegate; |
| import org.onosproject.workflow.api.WorkflowDataEvent; |
| import org.onosproject.workflow.api.WorkflowDataListener; |
| import org.onosproject.workflow.api.WorkflowException; |
| import org.onosproject.workflow.api.HandlerTask; |
| import org.onosproject.workflow.api.HandlerTaskBatchDelegate; |
| import org.onosproject.workflow.api.Workplace; |
| import org.onosproject.workflow.api.WorkplaceStore; |
| import org.onosproject.workflow.api.WorkplaceStoreDelegate; |
| import org.onosproject.workflow.api.WorkflowExecutionService; |
| import org.onosproject.event.AbstractListenerManager; |
| import org.onosproject.event.Event; |
| import org.onosproject.net.intent.WorkPartitionService; |
| import org.osgi.service.component.annotations.Activate; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Deactivate; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferenceCardinality; |
| import org.slf4j.Logger; |
| |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.UUID; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.stream.Collectors; |
| |
| import static java.util.concurrent.Executors.newFixedThreadPool; |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static java.util.concurrent.Executors.newSingleThreadScheduledExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.onosproject.workflow.api.WorkflowAttribute.REMOVE_AFTER_COMPLETE; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| @Component(immediate = true, service = WorkflowExecutionService.class) |
| public class WorkFlowEngine extends AbstractListenerManager<WorkflowDataEvent, WorkflowDataListener> |
| implements WorkflowExecutionService { |
| |
| protected static final Logger log = getLogger(WorkFlowEngine.class); |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ClusterService clusterService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected LeadershipService leadershipService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected WorkPartitionService partitionService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected WorkplaceStore workplaceStore; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected WorkflowStore workflowStore; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| protected ContextEventMapStore eventMapStore; |
| |
| private final WorkplaceStoreDelegate workplaceStoreDelegate = this::post; |
| |
| private final WorkflowBatchDelegate workflowBatchDelegate = new InternalWorkflowBatchDelegate(); |
| private final WorkflowAccumulator workflowAccumulator = new WorkflowAccumulator(workflowBatchDelegate); |
| |
| private final HandlerTaskBatchDelegate eventtaskBatchDelegate = new InternalHandlerTaskBatchDelegate(); |
| private final HandlerTaskAccumulator eventtaskAccumulator = new HandlerTaskAccumulator(eventtaskBatchDelegate); |
| |
| private ExecutorService workflowBatchExecutor; |
| private ExecutorService workflowExecutor; |
| |
| private ExecutorService handlerTaskBatchExecutor; |
| private ExecutorService handlerTaskExecutor; |
| |
| private static final int DEFAULT_WORKFLOW_THREADS = 12; |
| private static final int DEFAULT_EVENTTASK_THREADS = 12; |
| private static final int MAX_REGISTER_EVENTMAP_WAITS = 10; |
| |
| private ScheduledExecutorService eventMapTriggerExecutor; |
| |
| private TimerChain timerChain = new TimerChain(); |
| |
| private JsonDataModelInjector dataModelInjector = new JsonDataModelInjector(); |
| |
| public static final String APPID = "org.onosproject.workflow"; |
| private ApplicationId appId; |
| private NodeId localNodeId; |
| |
| @Activate |
| public void activate() { |
| appId = coreService.registerApplication(APPID); |
| workplaceStore.setDelegate(workplaceStoreDelegate); |
| localNodeId = clusterService.getLocalNode().id(); |
| leadershipService.runForLeadership(appId.name()); |
| |
| workflowBatchExecutor = newSingleThreadExecutor( |
| groupedThreads("onos/workflow", "workflow-batch", log)); |
| workflowExecutor = newFixedThreadPool(DEFAULT_WORKFLOW_THREADS, |
| groupedThreads("onos/workflow-exec", "worker-%d", log)); |
| handlerTaskBatchExecutor = newSingleThreadExecutor( |
| groupedThreads("onos/workflow", "handlertask-batch", log)); |
| handlerTaskExecutor = newFixedThreadPool(DEFAULT_EVENTTASK_THREADS, |
| groupedThreads("onos/handlertask-exec", "worker-%d", log)); |
| eventMapTriggerExecutor = newSingleThreadScheduledExecutor( |
| groupedThreads("onos/workflow-engine", "eventmap-trigger-executor")); |
| |
| (new WorkplaceWorkflow(this, workflowStore)).registerWorkflows(); |
| JsonDataModelTree data = new JsonDataModelTree(JsonNodeFactory.instance.objectNode()); |
| workplaceStore.registerWorkplace(Workplace.SYSTEM_WORKPLACE, |
| new DefaultWorkplace(Workplace.SYSTEM_WORKPLACE, data)); |
| |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| leadershipService.withdraw(appId.name()); |
| workplaceStore.unsetDelegate(workplaceStoreDelegate); |
| workflowBatchExecutor.shutdown(); |
| workflowExecutor.shutdown(); |
| handlerTaskBatchExecutor.shutdown(); |
| handlerTaskExecutor.shutdown(); |
| eventMapTriggerExecutor.shutdown(); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public void execInitWorklet(WorkflowContext context) { |
| |
| Workflow workflow = workflowStore.get(context.workflowId()); |
| if (workflow == null) { |
| log.error("Invalid workflow {}", context.workflowId()); |
| return; |
| } |
| |
| initWorkletExecution(context); |
| try { |
| Worklet initWorklet = workflow.init(context); |
| if (initWorklet != null) { |
| |
| log.info("{} worklet.process:{}", context.name(), initWorklet.tag()); |
| log.trace("{} context: {}", context.name(), context); |
| |
| dataModelInjector.inject(initWorklet, context); |
| initWorklet.process(context); |
| dataModelInjector.inhale(initWorklet, context); |
| |
| log.info("{} worklet.process(done): {}", context.name(), initWorklet.tag()); |
| log.trace("{} context: {}", context.name(), context); |
| } |
| |
| } catch (WorkflowException e) { |
| log.error("Exception: ", e); |
| context.setCause(e.getMessage()); |
| context.setState(WorkflowState.EXCEPTION); |
| workplaceStore.commitContext(context.name(), context, false); |
| return; |
| } |
| // trigger the execution of next worklet. |
| workplaceStore.registerContext(context.name(), context); |
| } |
| |
| @Override |
| public void eval(String contextName) { |
| |
| final WorkflowContext latestContext = workplaceStore.getContext(contextName); |
| if (latestContext == null) { |
| log.error("Invalid workflow context {}", contextName); |
| return; |
| } |
| |
| initWorkletExecution(latestContext); |
| |
| workplaceStore.commitContext(latestContext.name(), latestContext, true); |
| } |
| |
| @Override |
| public void eventMapTrigger(Event event, EventHintSupplier supplier) { |
| |
| if (event.subject() instanceof SystemWorkflowContext) { |
| return; |
| } |
| |
| Map<String, String> eventMap; |
| |
| String eventHint; |
| try { |
| eventHint = supplier.apply(event); |
| } catch (Throwable e) { |
| log.error("Exception: ", e); |
| return; |
| } |
| if (eventHint == null) { |
| // do nothing |
| log.error("Invalid eventHint, event: {}", event); |
| return; |
| } |
| |
| try { |
| eventMap = eventMapStore.getEventMap(event.getClass().getName(), eventHint); |
| } catch (WorkflowException e) { |
| log.error("Exception: ", e); |
| return; |
| } |
| |
| if (Objects.isNull(eventMap) || eventMap.isEmpty()) { |
| // do nothing; |
| log.debug("Invalid eventMap, event: {}", event); |
| return; |
| } |
| |
| for (Map.Entry<String, String> entry : eventMap.entrySet()) { |
| String contextName = entry.getKey(); |
| String strProgramCounter = entry.getValue(); |
| ProgramCounter pc; |
| try { |
| pc = ProgramCounter.valueOf(strProgramCounter); |
| } catch (IllegalArgumentException e) { |
| log.error("Exception: ", e); |
| return; |
| } |
| |
| WorkflowContext context = workplaceStore.getContext(contextName); |
| if (Objects.isNull(context)) { |
| log.info("Invalid context: {}, event: {}", contextName, event); |
| continue; |
| } |
| EventTask eventtask = null; |
| try { |
| eventtask = EventTask.builder() |
| .event(event) |
| .eventHint(eventHint) |
| .context(context) |
| .programCounter(pc) |
| .build(); |
| } catch (WorkflowException e) { |
| log.error("Exception: ", e); |
| } |
| |
| log.debug("eventtaskAccumulator.add: task: {}", eventtask); |
| if (!Objects.isNull(eventtask)) { |
| eventtaskAccumulator.add(eventtask); |
| } |
| } |
| } |
| |
| @Override |
| public void registerEventMap(Class<? extends Event> eventType, String eventHint, |
| String contextName, String programCounterString) throws WorkflowException { |
| eventMapStore.registerEventMap(eventType.getName(), eventHint, contextName, programCounterString); |
| for (int i = 0; i < MAX_REGISTER_EVENTMAP_WAITS; i++) { |
| Map<String, String> eventMap = eventMapStore.getEventMap(eventType.getName(), eventHint); |
| if (eventMap != null && eventMap.containsKey(contextName)) { |
| return; |
| } |
| try { |
| log.info("sleep {}", i); |
| Thread.sleep(10L * (i + 1)); |
| } catch (InterruptedException e) { |
| log.error("Exception: ", e); |
| Thread.currentThread().interrupt(); |
| } |
| } |
| } |
| |
| @Override |
| protected void post(WorkflowDataEvent event) { |
| |
| if (event.subject() == null || !isRelevant(event.subject())) { |
| log.debug("ignore event {}", event); |
| return; |
| } |
| |
| // trigger next worklet selection |
| WorkflowData dataModelContainer = event.subject(); |
| switch (event.type()) { |
| case INSERT: |
| case UPDATE: |
| if (dataModelContainer.triggerNext()) { |
| log.debug("workflowAccumulator.add: {}", dataModelContainer); |
| workflowAccumulator.add(dataModelContainer); |
| } else { |
| log.debug("pass-workflowAccumulator.add: {}", dataModelContainer); |
| } |
| break; |
| case REMOVE: |
| break; |
| default: |
| } |
| |
| // trigger EventTask for WorkflowDataEvent |
| eventMapTriggerExecutor.submit( |
| () -> eventMapTrigger( |
| event, |
| // event hint supplier |
| (ev) -> { |
| if (ev == null || ev.subject() == null) { |
| return null; |
| } |
| |
| if (ev.subject() instanceof WorkflowData) { |
| return ((WorkflowData) ev.subject()).name(); |
| } else { |
| return null; |
| } |
| } |
| ) |
| ); |
| } |
| |
| /** |
| * Checks whether this workflow data job is relevant to this ONOS node. |
| * @param job workflow data |
| * @return checking result |
| */ |
| private boolean isRelevant(WorkflowData job) { |
| // distributes event processing with work-partition |
| return partitionService.isMine(job.distributor(), this::stringHash); |
| } |
| |
| /** |
| * Gets hash of the string. |
| * @param str string to get a hash |
| * @return hash value |
| */ |
| public Long stringHash(String str) { |
| return UUID.nameUUIDFromBytes(str.getBytes()).getMostSignificantBits(); |
| } |
| |
| /** |
| * Class for handler task batch delegation. |
| */ |
| private class InternalHandlerTaskBatchDelegate implements HandlerTaskBatchDelegate { |
| @Override |
| public void execute(Collection<Collection<HandlerTask>> operations) { |
| log.debug("Execute {} operation(s).", operations.size()); |
| |
| CompletableFuture.runAsync(() -> { |
| List<CompletableFuture<Collection<HandlerTask>>> futures = operations.stream() |
| .map( |
| x -> CompletableFuture.completedFuture(x) |
| .thenApplyAsync(WorkFlowEngine.this::processHandlerTask, handlerTaskExecutor) |
| .exceptionally(e -> null) |
| ) |
| .collect(Collectors.toList()); |
| |
| // waiting the completion of futures |
| futures.parallelStream().forEach(x -> x.join()); |
| |
| }, handlerTaskBatchExecutor).exceptionally(e -> { |
| log.error("Error submitting batches:", e); |
| return null; |
| }).thenRun(eventtaskAccumulator::ready); |
| } |
| } |
| |
| /** |
| * Initializes worklet execution. |
| * @param context workflow context |
| */ |
| private void initWorkletExecution(WorkflowContext context) { |
| context.setState(WorkflowState.RUNNING); |
| context.setCause(""); |
| context.setWorkflowExecutionService(this); |
| context.setWorkflowStore(workflowStore); |
| context.setWorkplaceStore(workplaceStore); |
| context.waitCompletion(null, null, null, 0L); |
| context.setTriggerNext(false); |
| } |
| |
| /** |
| * Processes handler tasks. |
| * @param tasks handler tasks |
| * @return handler tasks processed |
| */ |
| private Collection<HandlerTask> processHandlerTask(Collection<HandlerTask> tasks) { |
| |
| for (HandlerTask task : tasks) { |
| if (task instanceof EventTimeoutTask) { |
| execEventTimeoutTask((EventTimeoutTask) task); |
| } else if (task instanceof TimeoutTask) { |
| execTimeoutTask((TimeoutTask) task); |
| } else if (task instanceof EventTask) { |
| execEventTask((EventTask) task); |
| } else { |
| log.error("Unsupported handler task {}", task); |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Executes event task. |
| * @param task event task |
| * @return event task |
| */ |
| private EventTask execEventTask(EventTask task) { |
| |
| Map<String, String> eventMap = null; |
| try { |
| eventMap = eventMapStore.getEventMap(task.event().getClass().getName(), task.eventHint()); |
| } catch (WorkflowException e) { |
| log.error("Exception: {}, trace: {}", e, Lists.newArrayList(e.getStackTrace())); |
| return task; |
| } |
| |
| if (Objects.isNull(eventMap) || eventMap.isEmpty()) { |
| return task; |
| } |
| |
| if (Objects.isNull(eventMap.get(task.context().name()))) { |
| return task; |
| } |
| |
| log.debug("execEventTask- task: {}, hash: {}", task, stringHash(task.context().distributor())); |
| |
| WorkflowContext context = (WorkflowContext) (task.context()); |
| Workflow workflow = workflowStore.get(context.workflowId()); |
| if (workflow == null) { |
| log.error("Invalid workflow {}", context.workflowId()); |
| return task; |
| } |
| |
| WorkflowContext latestContext = workplaceStore.getContext(context.name()); |
| if (latestContext == null) { |
| log.error("Invalid workflow context {}", context.name()); |
| return task; |
| } |
| |
| try { |
| if (!Objects.equals(latestContext.current(), task.programCounter())) { |
| log.error("Current worklet({}) is not mismatched with task work({}). Ignored.", |
| latestContext.current(), task.programCounter()); |
| return task; |
| } |
| |
| Worklet worklet = workflow.getWorkletInstance(task.programCounter().workletType()); |
| if (Worklet.Common.COMPLETED.equals(worklet) || Worklet.Common.INIT.equals(worklet)) { |
| log.error("Current worklet is {}, Ignored", worklet); |
| return task; |
| } |
| |
| initWorkletExecution(latestContext); |
| |
| log.info("{} worklet.isCompleted:{}", latestContext.name(), worklet.tag()); |
| log.trace("{} task:{}, context: {}", latestContext.name(), task, latestContext); |
| |
| dataModelInjector.inject(worklet, latestContext); |
| boolean completed = worklet.isCompleted(latestContext, task.event()); |
| dataModelInjector.inhale(worklet, latestContext); |
| |
| if (completed) { |
| |
| log.info("{} worklet.isCompleted(true):{}", latestContext.name(), worklet.tag()); |
| log.trace("{} task:{}, context: {}", latestContext.name(), task, latestContext); |
| |
| eventMapStore.unregisterEventMap( |
| task.eventType(), task.eventHint(), latestContext.name()); |
| |
| //completed case |
| // increase program counter |
| ProgramCounter pc = latestContext.current(); |
| latestContext.setCurrent(workflow.increased(pc)); |
| |
| workplaceStore.commitContext(latestContext.name(), latestContext, true); |
| return null; |
| } else { |
| |
| log.info("{} worklet.isCompleted(false):{}", latestContext.name(), worklet.tag()); |
| log.trace("{} task:{}, context: {}", latestContext.name(), task, latestContext); |
| |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| } |
| |
| } catch (WorkflowException e) { |
| log.error("Exception: ", e); |
| latestContext.setCause(e.getMessage()); |
| latestContext.setState(WorkflowState.EXCEPTION); |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| } catch (StorageException e) { |
| log.error("Exception: ", e); |
| // StorageException does not commit context. |
| } catch (Exception e) { |
| log.error("Exception: ", e); |
| latestContext.setCause(e.getMessage()); |
| latestContext.setState(WorkflowState.EXCEPTION); |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| } |
| |
| return task; |
| } |
| |
| /** |
| * Executes event timeout task. |
| * @param task event timeout task |
| * @return handler task |
| */ |
| private HandlerTask execEventTimeoutTask(EventTimeoutTask task) { |
| |
| Map<String, String> eventMap = null; |
| try { |
| eventMap = eventMapStore.getEventMap(task.eventType(), task.eventHint()); |
| } catch (WorkflowException e) { |
| log.error("execEventTimeoutTask: Exception: {}, trace: {}", |
| e, Lists.newArrayList(e.getStackTrace())); |
| return task; |
| } |
| |
| if (Objects.isNull(eventMap) || eventMap.isEmpty()) { |
| return task; |
| } |
| |
| if (Objects.isNull(eventMap.get(task.context().name()))) { |
| return task; |
| } |
| |
| log.debug("execEventTimeoutTask- task: {}, hash: {}", task, stringHash(task.context().distributor())); |
| |
| WorkflowContext context = (WorkflowContext) (task.context()); |
| Workflow workflow = workflowStore.get(context.workflowId()); |
| if (workflow == null) { |
| log.error("execEventTimeoutTask: Invalid workflow {}", context.workflowId()); |
| return task; |
| } |
| |
| WorkflowContext latestContext = workplaceStore.getContext(context.name()); |
| if (latestContext == null) { |
| log.error("execEventTimeoutTask: Invalid workflow context {}", context.name()); |
| return task; |
| } |
| |
| try { |
| if (!Objects.equals(latestContext.current(), task.programCounter())) { |
| log.error("execEventTimeoutTask: Current worklet({}) is not mismatched with task work({}). Ignored.", |
| latestContext.current(), task.programCounter()); |
| return task; |
| } |
| |
| Worklet worklet = workflow.getWorkletInstance(task.programCounter().workletType()); |
| if (worklet == Worklet.Common.COMPLETED || worklet == Worklet.Common.INIT) { |
| log.error("execEventTimeoutTask: Current worklet is {}, Ignored", worklet); |
| return task; |
| } |
| |
| initWorkletExecution(latestContext); |
| |
| eventMapStore.unregisterEventMap( |
| task.eventType(), task.eventHint(), latestContext.name()); |
| |
| log.info("{} worklet.timeout(for event):{}", latestContext.name(), worklet.tag()); |
| log.trace("{} task:{}, context: {}", latestContext.name(), task, latestContext); |
| |
| dataModelInjector.inject(worklet, latestContext); |
| worklet.timeout(latestContext); |
| dataModelInjector.inhale(worklet, latestContext); |
| |
| log.info("{} worklet.timeout(for event)(done):{}", latestContext.name(), worklet.tag()); |
| log.trace("{} task:{}, context: {}", latestContext.name(), task, latestContext); |
| |
| |
| workplaceStore.commitContext(latestContext.name(), latestContext, latestContext.triggerNext()); |
| |
| } catch (WorkflowException e) { |
| log.error("Exception: ", e); |
| latestContext.setCause(e.getMessage()); |
| latestContext.setState(WorkflowState.EXCEPTION); |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| } catch (StorageException e) { |
| log.error("Exception: ", e); |
| // StorageException does not commit context. |
| } catch (Exception e) { |
| log.error("Exception: ", e); |
| latestContext.setCause(e.getMessage()); |
| latestContext.setState(WorkflowState.EXCEPTION); |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| } |
| |
| return task; |
| } |
| |
| /** |
| * Executes timeout task. |
| * @param task time out task |
| * @return handler task |
| */ |
| private HandlerTask execTimeoutTask(TimeoutTask task) { |
| |
| log.debug("execTimeoutTask- task: {}, hash: {}", task, stringHash(task.context().distributor())); |
| |
| WorkflowContext context = (WorkflowContext) (task.context()); |
| Workflow workflow = workflowStore.get(context.workflowId()); |
| if (workflow == null) { |
| log.error("execTimeoutTask: Invalid workflow {}", context.workflowId()); |
| return task; |
| } |
| |
| WorkflowContext latestContext = workplaceStore.getContext(context.name()); |
| if (latestContext == null) { |
| log.error("execTimeoutTask: Invalid workflow context {}", context.name()); |
| return task; |
| } |
| |
| try { |
| if (!Objects.equals(latestContext.current(), task.programCounter())) { |
| log.error("execTimeoutTask: Current worklet({}) is not mismatched with task work({}). Ignored.", |
| latestContext.current(), task.programCounter()); |
| return task; |
| } |
| |
| Worklet worklet = workflow.getWorkletInstance(task.programCounter().workletType()); |
| if (worklet == Worklet.Common.COMPLETED || worklet == Worklet.Common.INIT) { |
| log.error("execTimeoutTask: Current worklet is {}, Ignored", worklet); |
| return task; |
| } |
| |
| initWorkletExecution(latestContext); |
| |
| log.info("{} worklet.timeout:{}", latestContext.name(), worklet.tag()); |
| log.trace("{} context: {}", latestContext.name(), latestContext); |
| |
| dataModelInjector.inject(worklet, latestContext); |
| worklet.timeout(latestContext); |
| dataModelInjector.inhale(worklet, latestContext); |
| |
| log.info("{} worklet.timeout(done):{}", latestContext.name(), worklet.tag()); |
| log.trace("{} context: {}", latestContext.name(), latestContext); |
| |
| workplaceStore.commitContext(latestContext.name(), latestContext, latestContext.triggerNext()); |
| |
| } catch (WorkflowException e) { |
| log.error("Exception: ", e); |
| latestContext.setCause(e.getMessage()); |
| latestContext.setState(WorkflowState.EXCEPTION); |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| } catch (StorageException e) { |
| log.error("Exception: ", e); |
| // StorageException does not commit context. |
| } catch (Exception e) { |
| log.error("Exception: ", e); |
| latestContext.setCause(e.getMessage()); |
| latestContext.setState(WorkflowState.EXCEPTION); |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| } |
| |
| return task; |
| } |
| |
| /** |
| * Class for delegation of workflow batch execution. |
| */ |
| private class InternalWorkflowBatchDelegate implements WorkflowBatchDelegate { |
| @Override |
| public void execute(Collection<WorkflowData> operations) { |
| log.debug("Execute {} operation(s).", operations.size()); |
| |
| CompletableFuture.runAsync(() -> { |
| List<CompletableFuture<WorkflowData>> futures = operations.stream() |
| .map( |
| x -> CompletableFuture.completedFuture(x) |
| .thenApplyAsync(WorkFlowEngine.this::execWorkflow, workflowExecutor) |
| .exceptionally(e -> null) |
| ) |
| .collect(Collectors.toList()); |
| |
| // waiting the completion of futures |
| futures.parallelStream().forEach(x -> x.join()); |
| |
| }, workflowBatchExecutor).exceptionally(e -> { |
| log.error("Error submitting batches:", e); |
| return null; |
| }).thenRun(workflowAccumulator::ready); |
| } |
| } |
| |
| /** |
| * Executes workflow. |
| * @param dataModelContainer workflow data model container(workflow or workplace) |
| * @return |
| */ |
| private WorkflowData execWorkflow(WorkflowData dataModelContainer) { |
| if (dataModelContainer instanceof WorkflowContext) { |
| return execWorkflowContext((WorkflowContext) dataModelContainer); |
| } else if (dataModelContainer instanceof Workplace) { |
| return execWorkplace((Workplace) dataModelContainer); |
| } else { |
| log.error("Invalid context {}", dataModelContainer); |
| return null; |
| } |
| } |
| |
| /** |
| * Executes workflow context. |
| * @param context workflow context |
| * @return workflow context |
| */ |
| private WorkflowContext execWorkflowContext(WorkflowContext context) { |
| |
| Workflow workflow = workflowStore.get(context.workflowId()); |
| if (workflow == null) { |
| log.error("Invalid workflow {}", context.workflowId()); |
| return null; |
| } |
| |
| final WorkflowContext latestContext = workplaceStore.getContext(context.name()); |
| if (latestContext == null) { |
| log.error("Invalid workflow context {}", context.name()); |
| return null; |
| } |
| |
| initWorkletExecution(latestContext); |
| |
| try { |
| final ProgramCounter pc = workflow.next(latestContext); |
| final Worklet worklet = workflow.getWorkletInstance(pc.workletType()); |
| |
| if (worklet == Worklet.Common.INIT) { |
| log.error("workflow.next gave INIT. It cannot be executed (context: {})", context.name()); |
| return latestContext; |
| } |
| |
| latestContext.setCurrent(pc); |
| if (worklet == Worklet.Common.COMPLETED) { |
| |
| if (workflow.attributes().contains(REMOVE_AFTER_COMPLETE)) { |
| workplaceStore.removeContext(latestContext.name()); |
| return null; |
| } else { |
| latestContext.setState(WorkflowState.IDLE); |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| return latestContext; |
| } |
| } |
| |
| log.info("{} worklet.process:{}", latestContext.name(), worklet.tag()); |
| log.trace("{} context: {}", latestContext.name(), latestContext); |
| |
| dataModelInjector.inject(worklet, latestContext); |
| worklet.process(latestContext); |
| dataModelInjector.inhale(worklet, latestContext); |
| |
| log.info("{} worklet.process(done): {}", latestContext.name(), worklet.tag()); |
| log.trace("{} context: {}", latestContext.name(), latestContext); |
| |
| |
| if (latestContext.completionEventType() != null) { |
| if (latestContext.completionEventGenerator() == null) { |
| String msg = String.format("Invalid exepecting event(%s), generator(%s)", |
| latestContext.completionEventType(), |
| latestContext.completionEventGenerator()); |
| throw new WorkflowException(msg); |
| } |
| |
| registerEventMap(latestContext.completionEventType(), latestContext.completionEventHint(), |
| latestContext.name(), pc.toString()); |
| |
| latestContext.completionEventGenerator().apply(); |
| |
| if (latestContext.completionEventTimeout() != 0L) { |
| final EventTimeoutTask eventTimeoutTask = EventTimeoutTask.builder() |
| .context(latestContext) |
| .programCounter(pc) |
| .eventType(latestContext.completionEventType().getName()) |
| .eventHint(latestContext.completionEventHint()) |
| .build(); |
| timerChain.schedule(latestContext.completionEventTimeout(), |
| () -> { |
| eventtaskAccumulator.add(eventTimeoutTask); |
| }); |
| } |
| } else { |
| if (latestContext.completionEventTimeout() != 0L) { |
| final TimeoutTask timeoutTask = TimeoutTask.builder() |
| .context(latestContext) |
| .programCounter(pc) |
| .build(); |
| |
| timerChain.schedule(latestContext.completionEventTimeout(), |
| () -> { |
| eventtaskAccumulator.add(timeoutTask); |
| }); |
| } else { |
| //completed case |
| // increase program counter |
| latestContext.setCurrent(workflow.increased(pc)); |
| } |
| } |
| |
| workplaceStore.commitContext(latestContext.name(), latestContext, latestContext.triggerNext()); |
| |
| } catch (WorkflowException e) { |
| log.error("Exception: ", e); |
| latestContext.setCause(e.getMessage()); |
| latestContext.setState(WorkflowState.EXCEPTION); |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| } catch (StorageException e) { |
| log.error("Exception: ", e); |
| // StorageException does not commit context. |
| } catch (Exception e) { |
| log.error("Exception: ", e); |
| latestContext.setCause(e.getMessage()); |
| latestContext.setState(WorkflowState.EXCEPTION); |
| workplaceStore.commitContext(latestContext.name(), latestContext, false); |
| } |
| |
| return latestContext; |
| } |
| |
| /** |
| * Execute workplace. |
| * @param workplace workplace |
| * @return workplace |
| */ |
| private Workplace execWorkplace(Workplace workplace) { |
| |
| return null; |
| } |
| |
| } |