org.nebula.builder.AsyncMethodAspect.java Source code

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Here is the source code for org.nebula.builder.AsyncMethodAspect.java

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/*
 * Copyright 2002-2015 the original author or authors.
 *
 * 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.nebula.builder;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.nebula.framework.core.Promise;

@Aspect
public class AsyncMethodAspect {

    @Pointcut("execution(@org.nebula.framework.annotation.Async * *(..))")
    public void executeAsyncMethods() {
    }

    @Around("executeAsyncMethods()")
    public Promise around(ProceedingJoinPoint pjp) throws Throwable {

        for (Object arg : pjp.getArgs()) {
            if (arg instanceof Promise && !((Promise) arg).isReady()) {
                return new Promise();
            }
        }

        return (Promise) pjp.proceed();
    }
}