/*
* Copyright 2002-2013 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.springframework.data.gemfire.function.config;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Map;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.data.gemfire.function.GemfireFunctionUtils;
import org.springframework.data.gemfire.function.annotation.GemfireFunction;
import org.springframework.util.Assert;
import org.springframework.util.ReflectionUtils;
/**
* A {@link BeanPostProcessor} to discover components wired as function implementations. That is
* beans that contain methods annotated with {code} @GemfireFunction {code}
*
* @author David Turanski
*
*/
public class GemfireFunctionBeanPostProcessor implements BeanPostProcessor {
private static final String GEMFIRE_FUNCTION_ANNOTATION_NAME = GemfireFunction.class.getName();
/* (non-Javadoc)
* @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessBeforeInitialization(java.lang.Object, java.lang.String)
*/
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
return bean;
}
/* (non-Javadoc)
* @see org.springframework.beans.factory.config.BeanPostProcessor#postProcessAfterInitialization(java.lang.Object, java.lang.String)
*/
@Override
public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
registerAnyDeclaredGemfireFunctionMethods(bean);
return bean;
}
private void registerAnyDeclaredGemfireFunctionMethods (Object bean) {
Method[] methods = ReflectionUtils.getAllDeclaredMethods(bean.getClass());
for (Method method: methods) {
GemfireFunction annotation = AnnotationUtils.getAnnotation(method, GemfireFunction.class);
if (annotation != null) {
Assert.isTrue(Modifier.isPublic(method.getModifiers()),"The method " + method.getName()+ " annotated with" + GEMFIRE_FUNCTION_ANNOTATION_NAME+ " must be public");
Map<String,Object> attributes = AnnotationUtils.getAnnotationAttributes(annotation,false,true);
GemfireFunctionUtils.registerFunctionForPojoMethod(bean, method, attributes, false);
}
}
}
}