| /* |
| * 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.sling.uca.impl; |
| |
| import java.lang.instrument.ClassFileTransformer; |
| import java.lang.instrument.IllegalClassFormatException; |
| import java.security.ProtectionDomain; |
| |
| import javassist.ClassPool; |
| import javassist.CtClass; |
| import javassist.CtMethod; |
| import javassist.bytecode.Descriptor; |
| |
| /** |
| * Sets timeouts for HTTP calls done using <em>Apache Commons HttpClient 3.x</em> |
| * |
| * <p>It inserts two calls in <tt>org.apache.commons.httpclient.params.DefaultHttpParamsFactory.createParams</tt> that set |
| * default values for <tt>http.connection.timeout</tt> and <tt>http.socket.timeout</tt>.</p> |
| */ |
| public class HttpClient3TimeoutTransformer implements ClassFileTransformer { |
| |
| private static final String DEFAULT_HTTP_PARAMS_FACTORY_CLASS_NAME = Descriptor.toJvmName("org.apache.commons.httpclient.params.DefaultHttpParamsFactory"); |
| |
| private final long connectTimeoutMillis; |
| private final long readTimeoutMillis; |
| private final AgentInfo agentInfoMbean; |
| |
| public HttpClient3TimeoutTransformer(long connectTimeoutMillis, long readTimeoutMillis, AgentInfo agentInfoMBean) { |
| this.connectTimeoutMillis = connectTimeoutMillis; |
| this.readTimeoutMillis = readTimeoutMillis; |
| this.agentInfoMbean = agentInfoMBean; |
| this.agentInfoMbean.registerTransformer(getClass()); |
| } |
| |
| @Override |
| public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, |
| ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException { |
| try { |
| if ( DEFAULT_HTTP_PARAMS_FACTORY_CLASS_NAME.equals(className) ) { |
| Log.get().log("%s asked to transform %s", getClass().getSimpleName(), className); |
| |
| ClassPool defaultPool = ClassPool.getDefault(); |
| CtClass cc = defaultPool.get(Descriptor.toJavaName(className)); |
| |
| CtMethod getSoTimeout = cc.getDeclaredMethod("createParams"); |
| // javassist seems unable to resolve the constant values, so just inline them |
| // also, unable to resolve calls to setParameter with int values (no boxing?) |
| // HttpConnectionParams.CONNECTION_TIMEOUT |
| getSoTimeout.insertAfter("$_.setParameter(\"http.connection.timeout\", Integer.valueOf(" + connectTimeoutMillis + "));"); |
| // HttpMethodParams.SO_TIMEOUT |
| getSoTimeout.insertAfter("$_.setParameter(\"http.socket.timeout\", Integer.valueOf(" + readTimeoutMillis + "));"); |
| |
| classfileBuffer = cc.toBytecode(); |
| cc.detach(); |
| Log.get().log("Transformation complete."); |
| |
| agentInfoMbean.registerTransformedClass(className); |
| } |
| return classfileBuffer; |
| } catch (Exception e) { |
| Log.get().fatal("Transformation failed", e); |
| return null; |
| } |
| } |
| } |