[摘录]quarts:Quartz Quick Start Guide
(Primarily authored by Dafydd James)
Welcome to the QuickStart guide for Quartz. As you read this guide, expect to see details of:
- Downloading Quartz
- Installing Quartz
- Configuring Quartz to your own particular needs
- Starting a sample application
Download and Installation of Quartz
To download Quartz, visit http://www.quartz-scheduler.org/downloads/ and download the most recent stable release.
Once you’ve downloaded and unpacked the zip file, it’s time to install it so that your application can see it.
The Quartz JAR files
The Quartz package includes a number of jar files, located in “lib” directory of the distribution. The main Quartz library is named quartz-xxx.jar (where xxx is a version number). In order to use any of Quartz’s features, this jar must be located on your application’s classpath.
Once you’ve downloaded Quartz, unzip it somewhere, grab the quartz-xxx.jar and put it where you want it, such that it can be included in your classpath.
Note: Quartz is also available on Maven Central, and instructions for including Quartz in your Maven project can be found on the Quartz download page.
I use Quartz primarily within an application server environment, so my preference is to include the Quartz JAR within my enterprise application (.ear or .war file). However, if you want to make Quartz available to many applications then simply make sure it’s on the classpath of your appserver. If you are making a stand-alone application, place it on the application’s classpath with all of the other JARs your application depends upon.
Quartz depends on a small number of third-party libraries (in the form of jars) which are included in the distribution .tar.gz file in the ‘lib’ directory. To use all the features of Quartz, all of these jars must also exist on your classpath. If you’re building a stand-alone Quartz application, I suggest you simply add all of them to the classpath. If you’re using Quartz within an app server environment, at least some of the jars will likely already exist on the classpath, so you can afford (if you want) to be a bit more selective as to which jars you include. For minimal usage, Quartz does require the slf4j-api jar.
The properties file
Quartz uses a properties file called (kudos on the originality) quartz.properties. This isn’t necessary at first, but to use anything but the most basic configuration it must be located on your classpath.
Again, to give an example based on my personal situation, my application was developed using WebLogic Workshop. I keep all of my configuration files (including quartz.properties) in a project under the root of my application. When I package everything up into a .ear file, the config project gets packaged into a .jar which is included within the final .ear. This automatically puts quartz.properties on the classpath.
If you’re building a web application (i.e. in the form of a .war file) that includes Quartz, you will likely want to place the quartz.properties file in the WEB-INF/classes folder in order for it to be on the classpath.
Configuration
This is the big bit! Quartz is a very configurable library. The best way to configure Quartz is to edit a quartz.properties file, and place it in your application’s classpath (see section immediately above).
There are several example properties files that ship within the Quartz distribution, particularly under the “examples” directory. I would suggest you create your own quartz.properties file, rather than making a copy of one of the examples and deleting the bits you don’t need. It’s neater that way, and you’ll explore more of what Quartz has to offer.
Full documentation of available properties is available in the Quartz Configuration Reference.
To get up and running quickly, a basic quartz.properties looks something like this:
org.quartz.scheduler.instanceName = MyScheduler
org.quartz.threadPool.threadCount = 3
org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore
The scheduler created by this configuration has the following characteristics:
org.quartz.scheduler.instanceName
- This scheduler’s name will be “MyScheduler”.org.quartz.threadPool.threadCount
- There are 3 threads in the thread pool, which means that a maximum of 3 jobs can be run simultaneously.org.quartz.jobStore.class
- All of Quartz’s data, such as details of jobs and triggers, is held in memory (rather than in a database).
Even if you have a database and want to use it with Quartz, I suggest you get Quartz working with the RamJobStore before you open up a whole new dimension by working with a database.
Starting a sample application
Now you’ve downloaded and installed Quartz, it’s time to get a sample application up and running. The following code obtains an instance of the scheduler, starts it, then shuts it down:
QuartzTest.java
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.impl.StdSchedulerFactory;
public class QuartzTest {
public static void main(String[] args) {
try {
// Grab the Scheduler instance from the Factory
Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
// and start it off
scheduler.start();
scheduler.shutdown();
} catch (SchedulerException se) {
se.printStackTrace();
}
}
}
Once you obtain a scheduler using StdSchedulerFactory.getDefaultScheduler(), your application will not terminate until you call scheduler.shutdown(), because there will be active threads.
If you have not set up logging, all logs will be sent to the console and your output will look something like this:
[INFO] 21 Jan 08:46:27.857 AM main [org.quartz.core.QuartzScheduler]
Quartz Scheduler v.2.0.0-SNAPSHOT created.
[INFO] 21 Jan 08:46:27.859 AM main [org.quartz.simpl.RAMJobStore]
RAMJobStore initialized.
[INFO] 21 Jan 08:46:27.865 AM main [org.quartz.core.QuartzScheduler]
Scheduler meta-data: Quartz Scheduler (v2.0.0) 'Scheduler' with instanceId 'NON_CLUSTERED'
Scheduler class: 'org.quartz.core.QuartzScheduler' - running locally.
NOT STARTED.
Currently in standby mode.
Number of jobs executed: 0
Using thread pool 'org.quartz.simpl.SimpleThreadPool' - with 50 threads.
Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and is not clustered.
[INFO] 21 Jan 08:46:27.865 AM main [org.quartz.impl.StdSchedulerFactory]
Quartz scheduler 'Scheduler' initialized from default resource file in Quartz package: 'quartz.properties'
[INFO] 21 Jan 08:46:27.866 AM main [org.quartz.impl.StdSchedulerFactory]
Quartz scheduler version: 2.0.0
[INFO] 21 Jan 08:46:27.866 AM main [org.quartz.core.QuartzScheduler]
Scheduler Scheduler_$_NON_CLUSTERED started.
[INFO] 21 Jan 08:46:27.866 AM main [org.quartz.core.QuartzScheduler]
Scheduler Scheduler_$_NON_CLUSTERED shutting down.
[INFO] 21 Jan 08:46:27.866 AM main [org.quartz.core.QuartzScheduler]
Scheduler Scheduler_$_NON_CLUSTERED paused.
[INFO] 21 Jan 08:46:27.867 AM main [org.quartz.core.QuartzScheduler]
Scheduler Scheduler_$_NON_CLUSTERED shutdown complete.
To do something interesting, you need code between the start()
and shutdown()
calls.
// define the job and tie it to our HelloJob class
JobDetail job = newJob(HelloJob.class)
.withIdentity("job1", "group1")
.build();
// Trigger the job to run now, and then repeat every 40 seconds
Trigger trigger = newTrigger()
.withIdentity("trigger1", "group1")
.startNow()
.withSchedule(simpleSchedule()
.withIntervalInSeconds(40)
.repeatForever())
.build();
// Tell quartz to schedule the job using our trigger
sched.scheduleJob(job, trigger);
(you will also need to allow some time for the job to be triggered and executed before calling shutdown()
- for a simple example such as this, you might just want to add a Thread.sleep(60000)
call).
Now go have some fun!
[摘录]quarts:Quartz Quick Start Guide的更多相关文章
- Quartz Quick Start Guide
Welcome to the QuickStart guide for Quartz. As you read this guide, expect to see details of: Downlo ...
- [摘录]quarts :overview
最近项目用了quarts 这个 任务调度器.今天开始详细的学习学习.参考链接:http://www.quartz-scheduler.org/# Quartz Enterprise Job Sched ...
- SlickUpload Quick Start Guide
Quick Start Guide The SlickUpload quick start demonstrates how to install SlickUpload in a new or ex ...
- RF《Quick Start Guide》操作总结
这篇文章之所以会给整理出来,是因为学了一个季度的RF后,再去看官网的这个文档,感触破多,最大的感触还是觉得自己走了不少弯路,还有些是学习方法上的弯路.在未查看这类官网文档之前,更多的是看其他各种人的博 ...
- QUICK START GUIDE
QUICK START GUIDE This page is a guide aimed at helping anyone set up a cheap radio scanner based on ...
- Quartz 2D Programming Guide
Quartz 2D Programming Guide 官方文档: Quartz 2D Programming Guide 译文: Quartz 2D编程指南(1) - 概览 Quartz 2D编程 ...
- Akka Stream文档翻译:Quick Start Guide: Reactive Tweets
Quick Start Guide: Reactive Tweets 快速入门指南: Reactive Tweets (reactive tweets 大概可以理解为“响应式推文”,在此可以测试下GF ...
- RobotFramework 官方demo Quick Start Guide rst配置文件分析
RobotFramework官方demo Quick Start Guide rst配置文件分析 by:授客 QQ:1033553122 博客:http://blog.sina.com.c ...
- RobotFramework RobotFramework官方demo Quick Start Guide浅析
RobotFramework官方demo Quick Start Guide浅析 by:授客 QQ:1033553122 博客:http://blog.sina.com.cn/ishouk ...
随机推荐
- 后半部分样式和JS前半部分脚本语言
样式 剩余样式: 1.<div style=display:"none"></div>:nono 是隐藏该元素内容,block是显示该元素内容 2.< ...
- 蓝牙BLE MTU规则与约定
1. 问题引言: 想在gatt client上(一般是手机上)传输长一点的数据给gatt server(一般是一个Bluetooth smart设备,即只有BLE功能的设备),但通过 writeCha ...
- 低功耗蓝牙4.0BLE编程-nrf51822开发(3)
蓝牙协议栈 nrf51822开发中,蓝牙协议栈和应用开发是分开的. (1)兼容蓝牙4.0低功耗协议栈基带层,L2CAP\AAT\SM\GAP\GATT协议,设备和广播,GATT客户端和服务器,SMP支 ...
- C#访问url地址并返回数据
public partial class Form1 : Form { static bool isSelect = false; public Form1() { InitializeCompone ...
- about eclipse
导出javadoc command选择bin下的javadoc.exe 配置编码和文字 英文:-locale en_US -encoding UTF-8 -charset UTF-8 中文:-loca ...
- Magento Service Temporarily Unavailable解决方法
插件升级错误或安装失败时 会出现Service Temporarily Unavailable错误,使网站前台后台都无法显示. 在操作完成的情况下,仍然出现这个错误时可以采用以下方法: 1.删除网站站 ...
- Java学习-016-CSV 文件读取实例源代码
上文(CSV文件写入)讲述了日常自动化测试过程中将测试数据写入 CSV 文件的源码,此文主要讲述如何从 CSV 文件获取测试过程中所需的参数化数据.敬请各位小主参阅,若有不足之处,敬请大神指正,不胜感 ...
- JavaScript实现在页面上的文本框中输入小写字母自动变为大写字母
<script language="javascript" type="text/javascript"> $(function () { $(&q ...
- java.lang.IllegalArgumentException: No converter found for return value of type: class Person
在http://www.cnblogs.com/winner-0715/p/6033462.html我们讲到三个条件就能实现SpringMVC返回json的功能 但是按照这三个条件配置后,运行出现了错 ...
- 实践JAVA wait(), notify(),sleep方法--一道多线程的面试题
建立三个线程,A线程打印10次A,B线程打印10次B,C线程打印10次C,要求线程同时运行,交替打印10次ABC. 这个问题用Object的wait(),notify()就可以很方便的解决. publ ...