/*
* 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;
public class InstrumentationSingleObjectSizer implements SingleObjectSizer {
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");
}
}
public long sizeof(Object object) {
return instrumentation.getObjectSize(object);
}
}