/*
* Copyright 2014 NAVER Corp.
* Licensed 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 com.navercorp.pinpoint.plugin.spring.beans;
import java.lang.reflect.Modifier;
import java.security.ProtectionDomain;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import com.navercorp.pinpoint.bootstrap.instrument.InstrumentClass;
import com.navercorp.pinpoint.bootstrap.instrument.InstrumentException;
import com.navercorp.pinpoint.bootstrap.instrument.InstrumentMethod;
import com.navercorp.pinpoint.bootstrap.instrument.Instrumentor;
import com.navercorp.pinpoint.bootstrap.instrument.MethodFilter;
import com.navercorp.pinpoint.bootstrap.instrument.MethodFilters;
import com.navercorp.pinpoint.bootstrap.instrument.transformer.TransformCallback;
import com.navercorp.pinpoint.bootstrap.logging.PLogger;
import com.navercorp.pinpoint.bootstrap.logging.PLoggerFactory;
import static com.navercorp.pinpoint.common.util.VarArgs.va;
/**
* @author Jongho Moon
*
*/
public class BeanMethodTransformer implements TransformCallback {
private static final int REQUIRED_ACCESS_FLAG = Modifier.PUBLIC;
private static final int REJECTED_ACCESS_FLAG = Modifier.ABSTRACT | Modifier.NATIVE | Modifier.STATIC;
private static final MethodFilter METHOD_FILTER = MethodFilters.modifier(REQUIRED_ACCESS_FLAG, REJECTED_ACCESS_FLAG);
private final PLogger logger = PLoggerFactory.getLogger(getClass());
private final Object lock = new Object();
private final AtomicInteger interceptorId = new AtomicInteger(-1);
private final boolean markError;
public BeanMethodTransformer(boolean markError) {
this.markError = markError;
}
@Override
public byte[] doInTransform(Instrumentor instrumentor, ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws InstrumentException {
try {
final InstrumentClass target = instrumentor.getInstrumentClass(loader, className, classfileBuffer);
if (!target.isInterceptable()) {
return null;
}
final List<InstrumentMethod> methodList = target.getDeclaredMethods(METHOD_FILTER);
for (InstrumentMethod method : methodList) {
addInterceptor(method);
}
return target.toBytecode();
} catch (Exception e) {
if(logger.isWarnEnabled()) {
logger.warn("Failed to spring beans modify. Cause:{}", e.getMessage(), e);
}
return null;
}
}
private void addInterceptor(InstrumentMethod targetMethod) throws InstrumentException {
int id = interceptorId.get();
if (id != -1) {
targetMethod.addInterceptor(id);
return;
}
synchronized (lock) {
id = interceptorId.get();
if (id != -1) {
targetMethod.addInterceptor(id);
return;
}
id = targetMethod.addInterceptor("com.navercorp.pinpoint.plugin.spring.beans.interceptor.BeanMethodInterceptor", va(markError));
interceptorId.set(id);
}
}
}