| /* |
| * 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.geode.management.internal.web.shell.support; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import javax.management.ObjectName; |
| |
| import org.apache.geode.management.internal.web.shell.HttpOperationInvoker; |
| |
| /** |
| * The HttpInvocationHandler class is an implementation of InvocationHandler serving as a proxy that |
| * uses HTTP remoting for the actual method invocation on the target resource. |
| * <p/> |
| * |
| * @see java.lang.reflect.InvocationHandler |
| * @see javax.management.ObjectName |
| * @see org.apache.geode.management.internal.web.shell.HttpOperationInvoker |
| * @since GemFire 8.0 |
| */ |
| @SuppressWarnings("unused") |
| public class HttpInvocationHandler implements InvocationHandler { |
| |
| private final HttpOperationInvoker operationInvoker; |
| |
| private final ObjectName objectName; |
| |
| public HttpInvocationHandler(final HttpOperationInvoker operationInvoker, |
| final ObjectName objectName) { |
| assert operationInvoker != null : "The HTTP-based OperationInvoker cannot be null!"; |
| assert objectName != null : "The ObjectName of the resource on which the operation is invoked cannot be null!"; |
| this.operationInvoker = operationInvoker; |
| this.objectName = objectName; |
| } |
| |
| protected ObjectName getObjectName() { |
| return objectName; |
| } |
| |
| protected HttpOperationInvoker getOperationInvoker() { |
| return operationInvoker; |
| } |
| |
| protected boolean isAttributeAccessor(final Method method) { |
| final String methodName = method.getName(); |
| return (methodName.startsWith("get") || methodName.startsWith("is")); |
| } |
| |
| protected String getAttributeName(final Method method) { |
| final String methodName = method.getName(); |
| // the attribute accessor method name either begins with 'get' or 'is' as defined by the JMX |
| // specification |
| final int beginIndex = (methodName.startsWith("get") ? 3 : 2); |
| return methodName.substring(beginIndex); |
| } |
| |
| protected String getResourceName() { |
| return getObjectName().getCanonicalName(); |
| } |
| |
| protected String[] getSignature(final Method method) { |
| final List<String> signature = new ArrayList<String>(); |
| |
| for (final Class<?> parameterType : method.getParameterTypes()) { |
| signature.add(parameterType.getName()); |
| } |
| |
| if (signature.size() == 0) { |
| return null; |
| } |
| |
| return signature.toArray(new String[signature.size()]); |
| } |
| |
| @Override |
| public Object invoke(final Object proxy, final Method method, final Object[] args) |
| throws Throwable { |
| if (isAttributeAccessor(method)) { |
| return getOperationInvoker().getAttribute(getResourceName(), getAttributeName(method)); |
| } else { |
| return getOperationInvoker().invoke(getResourceName(), method.getName(), args, |
| getSignature(method)); |
| } |
| } |
| |
| } |