ufuk

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class ApplicationContextHolder implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

tomysmile

type below:

brew update
brew install redis

To have launchd start redis now and restart at login:

brew services start redis

shelajev

package org.shelajev;

public class Main {
  public static void main(String[] args) {
    System.out.println("Hello World!");
    Thread t = new Thread();
    int a = countInstances(Thread.class);
    System.out.println("There are " + a + " instances of " + Thread.class);
  }

rednaxelafx

GC notifications are sent to the ServiceThread, as shown in the Groovy shell example in this gist. The ServiceThread is a JavaThread, so it can execute Java code.

To see GC notification in action, refer to a conversation in hotspot-gc-dev. Another thread of interest is the discussions on 7110173: GCNotifier::pushNotification publishes stale data.

In the HotSpot VM, GC notifications are pushed with GCNotifier::pushNotification(), in GCMemoryManager::gc_end(), which is in turn called by MemoryService::gc_end().

hotspot/src/share/vm/runtime/serviceThread.cpp