32 lines
975 B
Java
32 lines
975 B
Java
package ex9;
|
|
|
|
import java.util.LinkedList;
|
|
import java.util.List;
|
|
import java.util.concurrent.ConcurrentHashMap;
|
|
import java.util.concurrent.ConcurrentMap;
|
|
|
|
public final class Profiler {
|
|
private static final ConcurrentMap<String, List<String>> callLog = new ConcurrentHashMap<>();
|
|
|
|
static {
|
|
Runtime.getRuntime().addShutdownHook(new Thread(Profiler::print));
|
|
}
|
|
|
|
private Profiler() {
|
|
}
|
|
|
|
public static void logCall(final Thread thread, final String methodName) {
|
|
final List<String> list = callLog.computeIfAbsent(thread.getName(), ignored -> new LinkedList<>());
|
|
|
|
// thread safe, as once a thread accesses its own list access to said list is non-concurrent
|
|
list.add(methodName);
|
|
}
|
|
|
|
private static void print() {
|
|
for (final String threadName : callLog.keySet()) {
|
|
System.out.printf("=== %s ===\n", threadName);
|
|
callLog.get(threadName).forEach(System.out::println);
|
|
}
|
|
}
|
|
}
|