com.newmainsoftech.spray.slingong.datastore.testmodel.book.AuthorAspect.java Source code

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Here is the source code for com.newmainsoftech.spray.slingong.datastore.testmodel.book.AuthorAspect.java

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/*
 * Copyright (C) 2011-2013 NewMain Softech
 *
 * 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 com.newmainsoftech.spray.slingong.datastore.testmodel.book;

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.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Aspect
public class AuthorAspect {
    protected Logger logger = LoggerFactory.getLogger(this.getClass());

    // To validate arguments for createNewAuthor method of Author class ---------------------------
    // Used join point to get necessary argument instead of using args for pointcut 
    // because method signature may change.
    @Pointcut("execution( public void com.newmainsoftech.spray.slingong.datastore.testmodel.book.Author.createNewAuthor( ..))")
    public static void createNewAuthorPointcut() {
    }

    @Around("createNewAuthorPointcut()")
    public void aroundCreateNewAuthor(ProceedingJoinPoint proceedingJoinPoint) {
        Object[] argsArray = proceedingJoinPoint.getArgs();
        String name = (String) argsArray[0];
        if ((name == null) || "".equals(name)) {
            String message = "".equals(name) ? "Value of name property of Author entity cannot be empty string."
                    : "Value of name property of Author entity cannot be null.";
            if (logger.isErrorEnabled()) {
                logger.error(message);
            }
            throw new RuntimeException(message);
        }

        try {
            proceedingJoinPoint.proceed();
        } catch (Throwable throwable) {
            Throwable cause = throwable.getCause();
            if (cause == null) {
                cause = throwable;
            }
            if (logger.isErrorEnabled()) {
                logger.error("Failure at Author.createNewAuthor method", cause);
            }
            throw new RuntimeException(cause);
        }
    }
    // --------------------------------------------------------------------------------------------
}