| /** |
| * 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.sentry.core.common.transport; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.Method; |
| |
| /** |
| * SentryClientInvocationHandler is the base interface for all the InvocationHandler in SENTRY |
| */ |
| public abstract class SentryClientInvocationHandler implements InvocationHandler { |
| |
| /** |
| * Close the InvocationHandler: An InvocationHandler may create some contexts, |
| * these contexts should be close when the method "close()" of client be called. |
| */ |
| @Override |
| public final Object invoke(Object proxy, Method method, Object[] args) throws Exception { |
| // close() doesn't throw exception we supress that in case of connection |
| // loss. Changing SentryPolicyServiceClient#close() to throw an |
| // exception would be a backward incompatible change for Sentry clients. |
| if ("close".equals(method.getName()) && null == args) { |
| close(); |
| return null; |
| } |
| return invokeImpl(proxy, method, args); |
| } |
| |
| /** |
| * Subclass should implement this method for special function |
| */ |
| abstract public Object invokeImpl(Object proxy, Method method, Object[] args) throws Exception; |
| |
| /** |
| * An abstract method "close", an invocationHandler should close its contexts at here. |
| */ |
| public abstract void close(); |
| |
| } |