org.springframework.data.redis.core.CloseSuppressingInvocationHandler Maven / Gradle / Ivy
/*
* Copyright 2011-2018 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.redis.core;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.lang.Nullable;
/**
* Invocation handler that suppresses close calls on {@link RedisConnection}.
*
* @see RedisConnection#close()
* @author Costin Leau
* @author Christoph Strobl
*/
class CloseSuppressingInvocationHandler implements InvocationHandler {
private static final String CLOSE = "close";
private static final String HASH_CODE = "hashCode";
private static final String EQUALS = "equals";
private final Object target;
public CloseSuppressingInvocationHandler(Object target) {
this.target = target;
}
@Override
@Nullable
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (method.getName().equals(EQUALS)) {
// Only consider equal when proxies are identical.
return (proxy == args[0]);
} else if (method.getName().equals(HASH_CODE)) {
// Use hashCode of PersistenceManager proxy.
return System.identityHashCode(proxy);
} else if (method.getName().equals(CLOSE)) {
// Handle close method: suppress, not valid.
return null;
}
// Invoke method on target RedisConnection.
try {
Object retVal = method.invoke(this.target, args);
return retVal;
} catch (InvocationTargetException ex) {
throw ex.getTargetException();
}
}
}