org.springframework.data.gemfire.config.support.DiskStoreDirectoryBeanPostProcessor Maven / Gradle / Ivy
/*
* Copyright 2010-2020 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
*
* https://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.config.support;
import java.io.File;
import java.lang.reflect.Field;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.data.gemfire.DiskStoreFactoryBean.DiskDir;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
/**
* The {@link DiskStoreDirectoryBeanPostProcessor} processes any Pivotal GemFire {@link org.apache.geode.cache.DiskStore},
* {@link DiskDir} Spring beans defined in the application context to ensure that the directory actually exists
* before creating the {@link org.apache.geode.cache.DiskStore}.
*
* @author John Blum
* @see org.springframework.beans.factory.config.BeanPostProcessor
* @see org.apache.geode.cache.DiskStore
* @since 1.5.0
*/
@SuppressWarnings("unused")
public class DiskStoreDirectoryBeanPostProcessor implements BeanPostProcessor {
protected final Logger logger = LoggerFactory.getLogger(getClass());
/**
* {@inheritDoc}
*/
@Override
public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
if (logger.isDebugEnabled()) {
logger.debug("Processing Bean [{}] of Type [{}] with Name [{}] before initialization%n",
bean, ObjectUtils.nullSafeClassName(bean), beanName);
}
if (bean instanceof DiskDir) {
createIfNotExists((DiskDir) bean);
}
return bean;
}
/* (non-Javadoc) */
private void createIfNotExists(DiskDir diskDirectory) {
String location = readField(diskDirectory, "location");
File diskDirectoryFile = new File(location);
Assert.isTrue(diskDirectoryFile.isDirectory() || diskDirectoryFile.mkdirs(),
String.format("Failed to create Disk Directory [%s]%n", location));
if (logger.isInfoEnabled()) {
logger.info("Disk Directory is @ Location [{}].%n", location);
}
}
/* (non-Javadoc) */
@SuppressWarnings("unchecked")
private T readField(Object obj, String fieldName) {
try {
Class type = obj.getClass();
Field field;
do {
field = type.getDeclaredField(fieldName);
type = type.getSuperclass();
}
while (field == null && !Object.class.equals(type));
if (field == null) {
throw new NoSuchFieldException(String.format("No field with name [%1$s] found on object of type [%2$s]",
fieldName, ObjectUtils.nullSafeClassName(obj)));
}
field.setAccessible(true);
return (T) field.get(obj);
}
catch (Exception e) {
throw new RuntimeException(String.format("Failed to read field [%1$s] from object of type [%2$s]",
fieldName, ObjectUtils.nullSafeClassName(obj)), e);
}
}
}