Examples with SignalExternalWorkflowExecutionDecisionAttributes com.uber.cadence.SignalExternalWorkflowExecutionDecisionAttributes used on opensource projects

Example 1 with SignalExternalWorkflowExecutionDecisionAttributes

use of com.uber.cadence.SignalExternalWorkflowExecutionDecisionAttributes in project cadence-client by uber-java.

the class WorkflowDecisionContext method signalWorkflowExecution.

Consumer<Exception> signalWorkflowExecution(final SignalExternalWorkflowParameters parameters, BiConsumer<Void, Exception> callback) {
    final OpenRequestInfo<Void, Void> context = new OpenRequestInfo<>();
    final SignalExternalWorkflowExecutionDecisionAttributes attributes = new SignalExternalWorkflowExecutionDecisionAttributes();
    String signalId = decisions.getNextId();
    if (parameters.getDomain() == null) {
        attributes.setDomain(workflowContext.getDomain());
    } else {
        attributes.setDomain(parameters.getDomain());
    }
    attributes.setControl(signalId.getBytes(StandardCharsets.UTF_8));
    attributes.setSignalName(parameters.getSignalName());
    attributes.setInput(parameters.getInput());
    WorkflowExecution execution = new WorkflowExecution();
    execution.setRunId(parameters.getRunId());
    execution.setWorkflowId(parameters.getWorkflowId());
    attributes.setExecution(execution);
    decisions.signalExternalWorkflowExecution(attributes);
    context.setCompletionHandle(callback);
    final String finalSignalId = new String(attributes.getControl(), StandardCharsets.UTF_8);
    scheduledSignals.put(finalSignalId, context);
    return (e) -> {
        if (!scheduledSignals.containsKey(finalSignalId)) {
            // Cancellation handlers are not deregistered. So they fire after a signal completion.
            return;
        }
        decisions.cancelSignalExternalWorkflowExecution(finalSignalId, null);
        OpenRequestInfo<Void, Void> scheduled = scheduledSignals.remove(finalSignalId);
        if (scheduled == null) {
            throw new IllegalArgumentException("Signal \"" + finalSignalId + "\" wasn't scheduled");
        }
        callback.accept(null, e);
    };
}