/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.usergrid.persistence;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;
import com.google.inject.Injector;
/**
* This allows us to search guice for beans that are not in spring
*/
@Component
public class GuiceAdapterBeanFactory extends DefaultListableBeanFactory {
/**
* Wire our injector into this so we can use it go get beans
*/
@Autowired
private Injector injector;
public <T> T getBean( Class<T> requiredType ) throws BeansException {
final T bean = super.getBean( requiredType );
// Comes from spring, return it
if ( bean != null ) {
return bean;
}
final T guiceBean = injector.getInstance( requiredType );
if(guiceBean == null){
throw new NoGuiceBean( "Could not find bean for class" + requiredType );
}
return guiceBean;
}
@Override
public Object getBean( final String name ) throws BeansException {
final Object springBean = super.getBean( name );
return validateBean( springBean, name );
}
@Override
public <T> T getBean( final String name, final Class<T> requiredType ) throws BeansException {
final T springBean = super.getBean( name, requiredType );
return validateBean( springBean, name );
}
@Override
public <T> T getBean( final String name, final Class<T> requiredType, final Object... args ) throws BeansException {
final T springBean = super.getBean( name, requiredType, args );
return validateBean( springBean, name );
}
/**
* If we can't find the spring bean, we should blow up
* @param springBean
* @param <T>
* @return
*/
private <T> T validateBean( T springBean, final String name ) {
if ( springBean == null ) {
throw new NoGuiceBean( String.format("Guice beans by name is unsupoported, and could not find a spring bean with the name '%s'", name) );
}
return springBean;
}
/**
* Exception class to throw when we can't find a bean in spring, and can't find it in guice
*/
public static final class NoGuiceBean extends BeansException{
public NoGuiceBean( final String msg ) {
super( msg );
}
}
}