Shulou(Shulou.com)06/01 Report--

In this issue, the editor will bring you about how to analyze the open source task management platform TaskManager. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

Quartz.NET introduction

Quartz.NET is an open source job scheduling framework that is a .NET port of OpenSymphony's Quartz API. It is written in C # and can be used in winform and asp.net applications. It provides great flexibility without sacrificing simplicity. You can use it to create simple or complex schedules for executing a job. It has many features, such as: database support, clustering, plug-ins, support for cron-like expressions and so on. Download address: Quart.Net

To take a practical example: now we need to implement an express progress query application, we certainly do not have the database of various express delivery manufacturers, we can only use the API interface provided by the manufacturer to obtain the data. Fortunately, there are many off-the-shelf interfaces integrated with various vendors, based on these foundations. Now the customer has put forward a request to send me an email or text message to remind me when the progress of the express order changes. I think many online shopping friends have this kind of demand, bought a thing, check the progress from time to time, looking forward to arriving early. Then this reminder function is very urgent, and I am also based on my own needs to do the TaskManager open source project.

Cron expression

Cron expressions are used to specify the frequency of task execution. I have written an article on the online generator of Quartz Cron expressions, which you can use directly.

Introduction and implementation principle of Open Source TaskManager

TaskManager is an open source task management system based on Quartz.NET, which is hosted by Window services. At present, the system integrates four common tasks, agent IP crawler, express progress, message notification, dynamic modification of Job tasks.

Proxy IP crawler: crawl the latest proxy IP information from the website every other hour, and the crawled data is stored in the p_IPProxy table. With these proxy IP, it can be used for applications such as voting machines and interfaces. I'm sure you've encountered some problems such as a classmate or colleague sending you a link asking you to vote for XX, but many votes limit one IP to one vote, so with many agents IP, you can vote N by one person.

Delivery progress: this is a big boon for friends who are keen on online shopping, and of course it's the same for me. The biggest trouble for friends who often shop online may be where my express delivery is. From time to time, open the client to check the progress of express delivery. If there is a change in the progress of express delivery, it would be good to send text messages or email reminders. I will no longer have to rush to find out where the express delivery is. Take a look at the email reminder effect, are you very excited and would like to use this open source TaskManager platform!

Message notification: message notification related table p_Message (to be sent message table), p_MessageHistory (sent or sent failure message table)

Currently, a message will be inserted in the express task if there is any information change. The message informs the task to poll the p _ message table every 3 minutes. For each message, it will be sent up to three times (the first two times have failed), and the p_Message data will be inserted into the p_MessageHistory after it is sent.

Dynamically modify Job: every 5 minutes will read the configuration file TaskConfig.xml to see if there are new, modified, deleted tasks, and then dynamically adjust the currently running tasks. You don't need to restart Windows to add tasks.

Development mode:

The steps to add a new task are as follows

1. Add a task class that inherits the IJob interface under the TaskSet folder of the Mysoft.Task project. You can refer to the existing IpProxyJob

two。 Modify TaskConfig.xml configuration file

How to write the most important part of the running frequency CronExpressionString? It is also considered here that you can use the online Cron generator to generate the address http://jason.hahuachou.com/cron/index.htm, or you can use the Cron provided in the source code to deploy your own site.

Introduction to use

After introducing the function and implementation principle, we now introduce how to use TaskManager. Since we are using Windows services as carriers, we only need to know how to install Windows services to use the platform. Considering that many people don't know how to install and uninstall the Windows service, I provided a gadget I wrote earlier to install and uninstall the Windows service. The source code is also included in TaskManager.

1. Right-click to run the Windows installation and uninstall tool as an administrator

two。 Select TaskManger.exe- "install -" to run

After running successfully, you can find "scheduled Task Management Service" in system Management-"Service".

After a successful run, a Logs folder is generated to record the execution log

Of course, you need to configure when using the system, so let's talk about the configuration process. The configuration file path of the system Config\ Config.xml

1. Database connection information

Users can create related tables and initial data by downloading code from SVN under the task system "SQL merge script _ 20150911.sql" under the MyDocument project.

Change the value of the node SqlConnect node to your own database connection

two。 Insert express order simulation data

At present, you need to insert the express order number information manually to use the express delivery task.

INSERT INTO dbo.p_ExpressInfo (ExpressNo,ExpressCompanyCode,Receiver) SELECT '880350384879600241' AS ExpressNo,'yuantong' AS ExpressCompanyCode,'youemial@xx.com' AS Receiver

Among them, youemail@xx.com changes the email address to receive progress information. As long as there is a progress change, the system will automatically send email. Remember to change it to your own email address.

ExpressNo: express order number

ExpressCompanyCode: express company Code this value can be queried from the p_ExpressCompany table.

This is how the open source task management platform TaskManager shared by the editor is analyzed. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.