/*
* 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.ignite.internal.processors.resource;
import java.io.Serializable;
import java.lang.reflect.Modifier;
import org.apache.ignite.IgniteCheckedException;
import org.apache.ignite.internal.managers.deployment.GridDeployment;
import org.apache.ignite.internal.util.typedef.internal.S;
import org.apache.ignite.resources.SpringResource;
import org.springframework.context.ApplicationContext;
import org.springframework.util.StringUtils;
/**
* Spring bean injector implementation works with resources provided
* by Spring {@code ApplicationContext}.
*/
public class GridResourceSpringBeanInjector implements GridResourceInjector {
/** */
private ApplicationContext springCtx;
/**
* Creates injector object.
*
* @param springCtx Spring context.
*/
public GridResourceSpringBeanInjector(ApplicationContext springCtx) {
this.springCtx = springCtx;
}
/** {@inheritDoc} */
@Override public void inject(GridResourceField field, Object target, Class<?> cls,
GridDeployment depCls) throws IgniteCheckedException {
SpringResource ann = (SpringResource)field.getAnnotation();
assert ann != null;
// Note: injected non-serializable user resources should not mark
// injected spring beans with transient modifier.
// Check for 'transient' modifier only in serializable classes.
if (!Modifier.isTransient(field.getField().getModifiers()) &&
Serializable.class.isAssignableFrom(field.getField().getDeclaringClass())) {
throw new IgniteCheckedException("@SpringResource must only be used with 'transient' fields: " +
field.getField());
}
if (springCtx != null) {
Object bean = getBeanByResourceAnnotation(ann);
GridResourceUtils.inject(field.getField(), target, bean);
}
}
/** {@inheritDoc} */
@Override public void inject(GridResourceMethod mtd, Object target, Class<?> cls,
GridDeployment depCls) throws IgniteCheckedException {
SpringResource ann = (SpringResource)mtd.getAnnotation();
assert ann != null;
if (mtd.getMethod().getParameterTypes().length != 1)
throw new IgniteCheckedException("Method injection setter must have only one parameter: " + mtd.getMethod());
if (springCtx != null) {
Object bean = getBeanByResourceAnnotation(ann);
GridResourceUtils.inject(mtd.getMethod(), target, bean);
}
}
/** {@inheritDoc} */
@Override public void undeploy(GridDeployment dep) {
/* No-op. There is no cache. */
}
/** {@inheritDoc} */
@Override public String toString() {
return S.toString(GridResourceSpringBeanInjector.class, this);
}
/**
* Retrieves from {@link #springCtx} the bean specified by {@link SpringResource} annotation.
*
* @param annotation {@link SpringResource} annotation instance from field or method.
* @return Bean object retrieved from spring context.
* @throws IgniteCheckedException If failed.
*/
private Object getBeanByResourceAnnotation(SpringResource annotation) throws IgniteCheckedException {
assert springCtx != null;
String beanName = annotation.resourceName();
Class<?> beanCls = annotation.resourceClass();
boolean oneParamSet = !StringUtils.isEmpty(beanName) ^ beanCls != SpringResource.DEFAULT.class;
if (!oneParamSet) {
throw new IgniteCheckedException("Either bean name or its class must be specified in @SpringResource, " +
"but not both");
}
Object bean;
if (!StringUtils.isEmpty(beanName))
bean = springCtx.getBean(beanName);
else
bean = springCtx.getBean(beanCls);
return bean;
}
}