| /* |
| * 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.internal.size; |
| |
| import java.lang.instrument.Instrumentation; |
| |
| import org.apache.geode.annotations.internal.MakeImmutable; |
| |
| |
| public class InstrumentationSingleObjectSizer implements SingleObjectSizer { |
| |
| @MakeImmutable("Set in premain and never modified. Not sure if this can be made final") |
| private static Instrumentation instrumentation; |
| |
| public static void premain(String agentArgs, Instrumentation instrumentation) { |
| InstrumentationSingleObjectSizer.instrumentation = instrumentation; |
| } |
| |
| public InstrumentationSingleObjectSizer() { |
| if (instrumentation == null) { |
| throw new RuntimeException( |
| "SizeOfUtil50 must be used as an instrumentation agent by specifying -javaagent:/path/to/sizeagent.jar to java on the command line"); |
| } |
| |
| } |
| |
| @Override |
| public long sizeof(Object object) { |
| return instrumentation.getObjectSize(object); |
| } |
| |
| |
| } |