Examples with BulkheadOperator io.github.resilience4j.bulkhead.operator.BulkheadOperator used on opensource projects

Example 1 with BulkheadOperator

use of io.github.resilience4j.bulkhead.operator.BulkheadOperator in project resilience4j by resilience4j.

the class BulkheadMethodInterceptor method invoke.

@SuppressWarnings("unchecked")
@Override
public Object invoke(MethodInvocation invocation) throws Throwable {
    Bulkhead annotation = invocation.getMethod().getAnnotation(Bulkhead.class);
    RecoveryFunction<?> recoveryFunction = annotation.recovery().newInstance();
    if (registry == null) {
        registry = BulkheadRegistry.ofDefaults();
    }
    io.github.resilience4j.bulkhead.Bulkhead bulkhead = registry.bulkhead(annotation.name());
    if (bulkhead == null) {
        return invocation.proceed();
    }
    Class<?> returnType = invocation.getMethod().getReturnType();
    if (Promise.class.isAssignableFrom(returnType)) {
        Promise<?> result = (Promise<?>) invocation.proceed();
        if (result != null) {
            BulkheadTransformer transformer = BulkheadTransformer.of(bulkhead).recover(recoveryFunction);
            result = result.transform(transformer);
        }
        return result;
    } else if (Observable.class.isAssignableFrom(returnType)) {
        Observable<?> result = (Observable<?>) invocation.proceed();
        if (result != null) {
            BulkheadOperator operator = BulkheadOperator.of(bulkhead);
            result = result.lift(operator).onErrorReturn(t -> recoveryFunction.apply((Throwable) t));
        }
        return result;
    } else if (Flowable.class.isAssignableFrom(returnType)) {
        Flowable<?> result = (Flowable<?>) invocation.proceed();
        if (result != null) {
            BulkheadOperator operator = BulkheadOperator.of(bulkhead);
            result = result.lift(operator).onErrorReturn(t -> recoveryFunction.apply((Throwable) t));
        }
        return result;
    } else if (Single.class.isAssignableFrom(returnType)) {
        Single<?> result = (Single<?>) invocation.proceed();
        if (result != null) {
            BulkheadOperator operator = BulkheadOperator.of(bulkhead);
            result = result.lift(operator).onErrorReturn(t -> recoveryFunction.apply((Throwable) t));
        }
        return result;
    } else if (CompletionStage.class.isAssignableFrom(returnType)) {
        if (bulkhead.isCallPermitted()) {
            return ((CompletionStage<?>) invocation.proceed()).handle((o, throwable) -> {
                bulkhead.onComplete();
                if (throwable != null) {
                    try {
                        return recoveryFunction.apply(throwable);
                    } catch (Exception e) {
                        throw Exceptions.uncheck(throwable);
                    }
                } else {
                    return o;
                }
            });
        } else {
            final CompletableFuture promise = new CompletableFuture<>();
            Throwable t = new BulkheadFullException(String.format("Bulkhead '%s' is full", bulkhead.getName()));
            try {
                promise.complete(recoveryFunction.apply(t));
            } catch (Throwable t2) {
                promise.completeExceptionally(t2);
            }
            return promise;
        }
    }
    return handleOther(invocation, bulkhead, recoveryFunction);
}