com.gradecak.alfresco.mvc.aop.TransactionalAdvice.java Source code

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Here is the source code for com.gradecak.alfresco.mvc.aop.TransactionalAdvice.java

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/**
 * Copyright gradecak.com
    
 * 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.gradecak.alfresco.mvc.aop;

import java.lang.annotation.Annotation;
import java.lang.reflect.AnnotatedElement;
import java.lang.reflect.Method;

import org.alfresco.repo.transaction.RetryingTransactionHelper.RetryingTransactionCallback;
import org.alfresco.service.ServiceRegistry;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.core.BridgeMethodResolver;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.util.ClassUtils;

import com.gradecak.alfresco.mvc.annotation.AlfrescoTransaction;

public class TransactionalAdvice implements MethodInterceptor {

    private ServiceRegistry serviceRegistry;

    public Object invoke(final MethodInvocation invocation) throws Throwable {
        Class<?> targetClass = invocation.getThis() != null ? invocation.getThis().getClass() : null;

        Method specificMethod = ClassUtils.getMostSpecificMethod(invocation.getMethod(), targetClass);
        // If we are dealing with method with generic parameters, find the original
        // method.
        specificMethod = BridgeMethodResolver.findBridgedMethod(specificMethod);
        AlfrescoTransaction alfrescoTransaction = parseAnnotation(specificMethod);

        if (alfrescoTransaction != null) {
            RetryingTransactionCallback<Object> exampleWork = new RetryingTransactionCallback<Object>() {
                public Object execute() throws Throwable {
                    return invocation.proceed();
                }
            };
            boolean readonly = alfrescoTransaction.readOnly();
            Propagation propagation = alfrescoTransaction.propagation();

            boolean requiresNew = Propagation.REQUIRES_NEW.equals(propagation);
            return serviceRegistry.getTransactionService().getRetryingTransactionHelper()
                    .doInTransaction(exampleWork, readonly, requiresNew);
        } else {
            return invocation.proceed();
        }

    }

    private AlfrescoTransaction parseAnnotation(AnnotatedElement ae) {
        AlfrescoTransaction ann = ae.getAnnotation(AlfrescoTransaction.class);
        if (ann == null) {
            for (Annotation metaAnn : ae.getAnnotations()) {
                ann = metaAnn.annotationType().getAnnotation(AlfrescoTransaction.class);
                if (ann != null) {
                    break;
                }
            }
        }
        if (ann != null) {
            return parseAnnotation(ann);
        } else {
            return null;
        }
    }

    private AlfrescoTransaction parseAnnotation(AlfrescoTransaction ann) {
        // parse if needed something else
        return ann;
    }

    public void setServiceRegistry(ServiceRegistry serviceRegistry) {
        this.serviceRegistry = serviceRegistry;
    }

}