/*
* (non-Javadoc)
*
* @see java.lang.Thread#run()
*/
public void run() {
try {
while (true) {
if (Manager.instance().canDump()) {
Manager.instance().setProfileFlag(true);
TimeUnit.SECONDS.sleep(eachProfUseTime);
Manager.instance().setProfileFlag(false);
// 等待已开始的End方法执行完成
TimeUnit.MILLISECONDS.sleep(500L);
dumpProfileData();
}
TimeUnit.SECONDS.sleep(eachProfIntervalTime);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
Manager.instance().setProfileFlag(false);
if (fileWriter != null) {
fileWriter.closeFile();
}
// 等待已开始的End方法执行完成
try {
TimeUnit.MILLISECONDS.sleep(500L);
} catch (InterruptedException e) {
e.printStackTrace();
}
Profiler.clearData();
}
}
/* (non-Javadoc)
* @see java.lang.instrument.ClassFileTransformer#transform(java.lang.ClassLoader, java.lang.String, java.lang.Class, java.security.ProtectionDomain, byte[])
*/
public byte[] transform(
ClassLoader loader,
String className,
Class<?> classBeingRedefined,
ProtectionDomain protectionDomain,
byte[] classfileBuffer)
throws IllegalClassFormatException {
if (loader != null && ProfFilter.isNotNeedInjectClassLoader(loader.getClass().getName())) {
return classfileBuffer;
}
if (!ProfFilter.isNeedInject(className)) {
return classfileBuffer;
}
if (ProfFilter.isNotNeedInject(className)) {
return classfileBuffer;
}
if (Manager.instance().isDebugMode()) {
System.out.println(
" ---- TProfiler Debug: ClassLoader:" + loader + " ---- class: " + className);
}
// 记录注入类数
Profiler.instrumentClassCount.getAndIncrement();
try {
ClassReader reader = new ClassReader(classfileBuffer);
ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
ClassAdapter adapter = new ProfClassAdapter(writer, className);
reader.accept(adapter, 0);
// 生成新类字节码
return writer.toByteArray();
} catch (Throwable e) {
e.printStackTrace();
// 返回旧类字节码
return classfileBuffer;
}
}