private static void showThreads(PrintStream pw, ThreadGroup g, Thread current) {
int nthreads = g.activeCount();
pw.println("\nThread Group = " + g.getName() + " activeCount= " + nthreads);
Thread[] tarray = new Thread[nthreads];
int n = g.enumerate(tarray, false);
for (int i = 0; i < n; i++) {
Thread thread = tarray[i];
ClassLoader loader = thread.getContextClassLoader();
String loaderName = (loader == null) ? "Default" : loader.getClass().getName();
Thread.State state = thread.getState();
long id = thread.getId();
pw.print(" " + id + " " + thread.getName() + " " + state + " " + loaderName);
if (thread == current) pw.println(" **** CURRENT ***");
else pw.println();
}
int ngroups = g.activeGroupCount();
ThreadGroup[] garray = new ThreadGroup[ngroups];
int ng = g.enumerate(garray, false);
for (int i = 0; i < ng; i++) {
ThreadGroup nested = garray[i];
showThreads(pw, nested, current);
}
}
/** Utility routine for setting the context class loader. Returns previous class loader. */
public static ClassLoader setContextClassLoader(ClassLoader newClassLoader) {
// Can only reference final local variables from dopriveleged block
final ClassLoader classLoaderToSet = newClassLoader;
final Thread currentThread = Thread.currentThread();
ClassLoader originalClassLoader = currentThread.getContextClassLoader();
if (classLoaderToSet != originalClassLoader) {
if (System.getSecurityManager() == null) {
currentThread.setContextClassLoader(classLoaderToSet);
} else {
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction() {
public java.lang.Object run() {
currentThread.setContextClassLoader(classLoaderToSet);
return null;
}
});
}
}
return originalClassLoader;
}