shutdown

springboot-actuator应用后台监控

时光怂恿深爱的人放手 提交于 2019-12-26 08:30:27
一 前言 springboot 额外的特色是提供了后台应用监控,可以通过 HTTP 或者 JMX的方式管理监控应用,本文主讲HTTP方式;其主要的功能是监控应用的健康状态,查看环境变量等; 二 pom.xml springboot 2.1.1,主要引入 actuator 依赖,web依赖用于测试; <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> 三 默认开启端点 3.1 默认端点 health 直接编写主程序入口,启动;浏览器输入 http://localhost:8080/actuator/health;结果如下,状态是UP; 翻翻源码heath状态码如下 public OrderedHealthAggregator() { this.setStatusOrder(Status.DOWN, Status.OUT_OF_SERVICE,

How to Shutdown Rserve(), running in DEBUG

♀尐吖头ヾ 提交于 2019-12-25 02:31:38
问题 I have started Rserve() from within RStudio on my Mac in debug mode with the following: Rserve(debug=TRUE,args="--no-save") And as a result, I get the message: Note: debug version of Rserve doesn't daemonize so your R session will be blocked until you shut down Rserve. This is fine & good, until I've finished with using Rserve in debug mode. How can I send an interrupt in order to gracefully shutdown Rserve() ? Thanks! 来源: https://stackoverflow.com/questions/24004257/how-to-shutdown-rserve

Using JNA or similar to shutdown and restart computer in linux and mac

狂风中的少年 提交于 2019-12-24 19:25:55
问题 I am trying to write a function in java that will shutdown, force shutdown, restart and force restart the computer and it should work on Windows, Linux and Mac. Windows is not a problem, but I am unable to run commands to shutdown on Linux due to the sudo privileges. I was therefore thinking of using JNA to shut down the computer (i know you can use JNA to do this on windows), but I can't find any examples online for linux or mac. Can anyone help me out? It will be much appreciated! Even if

Get Windows Server shutdown reason in C#

醉酒当歌 提交于 2019-12-24 11:20:01
问题 Is it possible to get shutdown reason in Windows Server 2008 immediately after user choose the reason in dialog window? For the shutdown event I'm using SystemEvents.SessionEnding. I want to write windows service, which will send e-mail about this event. Or is there any other way in windows server to send e-mails about shutdown/restart event with getting the reason entered by user? Also, I want to notify about power source change (electic line/battery), but this I have already solved by

深入理解 Java 线程池

本秂侑毒 提交于 2019-12-24 10:38:47
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 一、简介 什么是线程池 线程池是一种多线程处理形式,处理过程中将任务添加到队列,然后在创建线程后自动启动这些任务。 为什么要用线程池 如果并发请求数量很多,但每个线程执行的时间很短,就会出现频繁的创建和销毁线程。如此一来,会大大降低系统的效率,可能频繁创建和销毁线程的时间、资源开销要大于实际工作的所需。 正是由于这个问题,所以有必要引入线程池。使用 线程池的好处 有以下几点: 降低资源消耗 - 通过重复利用已创建的线程降低线程创建和销毁造成的消耗。 提高响应速度 - 当任务到达时,任务可以不需要等到线程创建就能立即执行。 提高线程的可管理性 - 线程是稀缺资源,如果无限制的创建,不仅会消耗系统资源,还会降低系统的稳定性,使用线程池可以进行统一的分配,调优和监控。但是要做到合理的利用线程池,必须对其原理了如指掌。 二、Executor 框架 Executor 框架是一个根据一组执行策略调用,调度,执行和控制的异步任务的框架,目的是提供一种将”任务提交”与”任务如何运行”分离开来的机制。 核心 API 概述 Executor 框架核心 API 如下: Executor - 运行任务的简单接口。 ExecutorService - 扩展了 Executor 接口。扩展能力: 支持有返回值的线程;

shutdown windows 8 from metro app

一笑奈何 提交于 2019-12-24 10:03:02
问题 I'm doing a metro app for Windows 8. And as part of its functionality, I need to initiate shutdown of Winodws 8 from the Metro App. Here are the questions: 1) Firstly, I researched a lot on this topic and I found out that System.Diagnostics.Process is not available for Metro App. So, is there a another way around? 2) Even if I can't directly shutdown, is there a way to trigger it from the Metro App? I would prefer a solution in C#. Thanks. 回答1: Doing this just isn't possible in a Windows

how to know the application is shutting down

家住魔仙堡 提交于 2019-12-23 17:41:18
问题 There is a WPF application. i want to log when the application is closed. but i cannot modify the application (some restriction, just because business). So i create an invisible form component live inside the existing application, add as a dll library, so the existing application do not need to be modified. but the issue is, how can my invisible component know the application is shutting down? is there some function or event handler i can use? Solution: there are some event can do that,

centos6 设置 tomcat8 自启动脚本

喜你入骨 提交于 2019-12-23 17:34:55
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> centos6.5 版本 cd /etc/init.d/ , 新建 tomcat8 文件 #!/bin/bash # # tomcat startup script for the Tomcat server # # # chkconfig: 345 80 20 # description: start the tomcat deamon # # Source function library ./etc/rc.d/init.d/functions prog=tomcat8 JAVA_HOME=/usr/jdk/jdk1.8.0_211#你的jdk安装目录 export JAVA_HOME CATALANA_HOME=/usr/tomcat/apache-tomcat-8.5.40/#你的tomcat安装目录 export CATALINA_HOME case "$1" in start) echo "Starting Tomcat..." $CATALANA_HOME/bin/startup.sh ;; stop) echo "Stopping Tomcat..." $CATALANA_HOME/bin/shutdown.sh ;; restart) echo "Stopping Tomcat..."

Shutdown Hook c++

断了今生、忘了曾经 提交于 2019-12-23 09:16:16
问题 is there some way to run code on termination, no matter what kind termination (abnormal,normal,uncaught exception etc.)? I know its actually possible in Java, but is it even possible in C++? Im assuming a windows environment. 回答1: No -- if somebody invokes TerminateProcess , your process will be destroyed without further adieu, and (in particular) without any chance to run any more code in the process of shutting down. 回答2: For normal closing applciation I would suggest atexit() 回答3: One good

How to get return code in shutdown hook

半腔热情 提交于 2019-12-23 08:54:29
问题 I need to modify JVM return code according to my application result. But it is risky to explicitly call System.exit(code) coz the application is complicated and it is hard to identify the end of running threads. So I come up with using shutdown hook to modify the return code before JVM exit. But there is a problem that how can I get the original return code of JVM coz it may be an error code not 0. 回答1: You should not call exit method in shutdown hook, System.exit(status) internally calls