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JarProfilerPluginClassInjector.java
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JarProfilerPluginClassInjector.java
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/**
* 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.profiler.instrument;
import java.io.InputStream;
import java.net.URLClassLoader;
import com.navercorp.pinpoint.profiler.plugin.PluginConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.navercorp.pinpoint.exception.PinpointException;
/**
* @author Jongho Moon
* @author jaehong.kim
*/
public class JarProfilerPluginClassInjector implements PluginClassInjector {
private final Logger logger = LoggerFactory.getLogger(JarProfilerPluginClassInjector.class);
private final ClassInjector bootstrapClassLoaderHandler;
private final ClassInjector urlClassLoaderHandler;
private final ClassInjector plainClassLoaderHandler;
private final PluginConfig pluginConfig;
public JarProfilerPluginClassInjector(PluginConfig pluginConfig) {
if (pluginConfig == null) {
throw new NullPointerException("pluginConfig must not be null");
}
this.bootstrapClassLoaderHandler = new BootstrapClassLoaderHandler(pluginConfig);
this.urlClassLoaderHandler = new URLClassLoaderHandler(pluginConfig);
this.plainClassLoaderHandler = new PlainClassLoaderHandler(pluginConfig);
this.pluginConfig = pluginConfig;
}
@Override
public PluginConfig getPluginConfig() {
return pluginConfig;
}
@Override
@SuppressWarnings("unchecked")
public <T> Class<? extends T> injectClass(ClassLoader classLoader, String className) {
try {
if (classLoader == null) {
return (Class<T>)bootstrapClassLoaderHandler.injectClass(null, className);
} else if (classLoader instanceof URLClassLoader) {
final URLClassLoader urlClassLoader = (URLClassLoader) classLoader;
return (Class<T>)urlClassLoaderHandler.injectClass(urlClassLoader, className);
} else {
return (Class<T>)plainClassLoaderHandler.injectClass(classLoader, className);
}
} catch (Throwable e) {
// fixed for LinkageError
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);
}
}
public InputStream getResourceAsStream(ClassLoader targetClassLoader, String className) {
try {
if (targetClassLoader == null) {
return bootstrapClassLoaderHandler.getResourceAsStream(null, className);
} else if (targetClassLoader instanceof URLClassLoader) {
final URLClassLoader urlClassLoader = (URLClassLoader) targetClassLoader;
return urlClassLoaderHandler.getResourceAsStream(urlClassLoader, className);
} else {
return plainClassLoaderHandler.getResourceAsStream(targetClassLoader, className);
}
} catch (Throwable e) {
logger.warn("Failed to load plugin resource as stream {} with classLoader {}", className, targetClassLoader, e);
return null;
}
}
}