Examples with ContextAware org.guvnor.ala.pipeline.ContextAware used on opensource projects

Example 1 with ContextAware

use of org.guvnor.ala.pipeline.ContextAware in project kie-wb-common by kiegroup.

the class PipelineExecutor method continuePipeline.

private void continuePipeline(final PipelineContext context, final PipelineEventListener... eventListeners) {
    while (!context.isFinished()) {
        final Stage<Object, ?> stage = getCurrentStage(context);
        final Object newInput = pollOutput(context);
        try {
            propagateEvent(new BeforeStageExecutionEvent(context.getExecutionId(), context.getPipeline(), stage), eventListeners);
            stage.execute(newInput, output -> {
                final ConfigExecutor executor = resolve(output.getClass());
                if (output instanceof ContextAware) {
                    ((ContextAware) output).setContext(Collections.unmodifiableMap(context.getValues()));
                }
                final Object newOutput = interpolate(context.getValues(), output);
                if (executor == null) {
                    throw new RuntimeException("Fail to resolve ConfigExecutor for: " + output.getClass());
                }
                context.getValues().put(executor.inputId(), newOutput);
                if (executor instanceof BiFunctionConfigExecutor) {
                    final Optional result = (Optional) ((BiFunctionConfigExecutor) executor).apply(newInput, newOutput);
                    context.pushOutput(executor.outputId(), result.get());
                } else if (executor instanceof FunctionConfigExecutor) {
                    final Optional result = (Optional) ((FunctionConfigExecutor) executor).apply(newOutput);
                    context.pushOutput(executor.outputId(), result.get());
                }
                propagateEvent(new AfterStageExecutionEvent(context.getExecutionId(), context.getPipeline(), stage), eventListeners);
            });
        } catch (final Throwable t) {
            t.printStackTrace();
            final RuntimeException exception = new RuntimeException("An error occurred while executing the " + (stage == null ? "null" : stage.getName()) + " stage.", t);
            propagateEvent(new OnErrorStageExecutionEvent(context.getExecutionId(), context.getPipeline(), stage, exception), eventListeners);
            propagateEvent(new OnErrorPipelineExecutionEvent(context.getExecutionId(), context.getPipeline(), stage, exception), eventListeners);
            throw exception;
        }
    }
    final Object output = pollOutput(context);
    while (context.hasCallbacks()) {
        context.applyCallbackAndPop(output);
    }
}