/*
* Copyright 2017 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.profiler.instrument.classloading;
import com.navercorp.pinpoint.profiler.instrument.InstrumentEngine;
import com.navercorp.pinpoint.exception.PinpointException;
import com.navercorp.pinpoint.profiler.plugin.PluginConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
/**
* @author Woonduk Kang(emeroad)
* @author jaehong.kim
*/
public class BootstrapClassLoaderHandler implements ClassInjector {
private final Logger logger = LoggerFactory.getLogger(this.getClass());
private final PluginConfig pluginConfig;
private final Object lock = new Object();
private boolean injectedToRoot = false;
private final InstrumentEngine instrumentEngine;
public BootstrapClassLoaderHandler(PluginConfig pluginConfig, InstrumentEngine instrumentEngine) {
if (pluginConfig == null) {
throw new NullPointerException("pluginConfig must not be null");
}
if (instrumentEngine == null) {
throw new NullPointerException("instrumentEngine must not be null");
}
this.pluginConfig = pluginConfig;
this.instrumentEngine = instrumentEngine;
}
@Override
@SuppressWarnings("unchecked")
public <T> Class<? extends T> injectClass(ClassLoader classLoader, String className) {
try {
if (classLoader == null) {
return (Class<T>) injectClass0(className);
}
} catch (Exception e) {
logger.warn("Failed to load plugin class {} with classLoader {}", className, classLoader, e);
throw new PinpointException("Failed to load plugin class " + className + " with classLoader " + classLoader, e);
}
throw new PinpointException("invalid ClassLoader");
}
private Class<?> injectClass0(String className) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException, ClassNotFoundException {
appendToBootstrapClassLoaderSearch();
return Class.forName(className, false, null);
}
private void appendToBootstrapClassLoaderSearch() {
synchronized (lock) {
if (this.injectedToRoot == false) {
this.injectedToRoot = true;
instrumentEngine.appendToBootstrapClassPath(pluginConfig.getPluginJarFile());
}
}
}
@Override
public InputStream getResourceAsStream(ClassLoader targetClassLoader, String classPath) {
try {
if (targetClassLoader == null) {
ClassLoader classLoader = ClassLoader.getSystemClassLoader();
if (classLoader == null) {
return null;
}
appendToBootstrapClassLoaderSearch();
return classLoader.getResourceAsStream(classPath);
}
} catch (Exception e) {
logger.warn("Failed to load plugin resource as stream {} with classLoader {}", classPath, targetClassLoader, e);
return null;
}
logger.warn("Invalid bootstrap class loader. cl={}", targetClassLoader);
return null;
}
}