11.10 Map

src/concurrency/CaptureUncaughtException.java

@@ -0,0 +1,47 @@
+package concurrency;//: concurrency/CaptureUncaughtException.java
+import java.util.concurrent.*;
+
+class ExceptionThread2 implements Runnable {
+  public void run() {
+    Thread t = Thread.currentThread();
+    System.out.println("run() by " + t);
+    System.out.println(
+      "eh = " + t.getUncaughtExceptionHandler());
+    throw new RuntimeException();
+  }
+}
+
+class MyUncaughtExceptionHandler implements
+Thread.UncaughtExceptionHandler {
+  public void uncaughtException(Thread t, Throwable e) {
+    System.out.println("caught " + e);
+  }
+}
+
+class HandlerThreadFactory implements ThreadFactory {
+  public Thread newThread(Runnable r) {
+    System.out.println(this + " creating new Thread");
+    Thread t = new Thread(r);
+    System.out.println("created " + t);
+    t.setUncaughtExceptionHandler(
+      new MyUncaughtExceptionHandler());
+    System.out.println(
+      "eh = " + t.getUncaughtExceptionHandler());
+    return t;
+  }
+}
+
+public class CaptureUncaughtException {
+  public static void main(String[] args) {
+    ExecutorService exec = Executors.newCachedThreadPool(
+      new HandlerThreadFactory());
+    exec.execute(new ExceptionThread2());
+  }
+} /* Output: (90% match)
+HandlerThreadFactory@de6ced creating new Thread
+created Thread[Thread-0,5,main]
+eh = MyUncaughtExceptionHandler@1fb8ee3
+run() by Thread[Thread-0,5,main]
+eh = MyUncaughtExceptionHandler@1fb8ee3
+caught java.lang.RuntimeException
+*///:~