Replacing JSON with MsgPack protocol in Phoenix WebSocket

Why MsgPack? MsgPack is lighter and less traffic than JSON MsgPack's own date time type (always UTC) MsgPack comes with binary data type (it's convenient to transfer a picture or something) MsgPack supports custom types The standards of MsgPack are open source and well documented Phoenix.Socket.Serializer module In the Phoenix framework, ther ...

Posted by shmoo525 on Mon, 27 Apr 2020 04:11:12 -0700

Linux server memory monitoring - check every hour & over send mail & restart the most expensive Java program

Introduction and advantages Using this script, you can judge whether the system memory usage exceeds the set percentage It can restart the program when the warning value is exceeded It can record the restart process and send the specific LOG mail to the designated addressee Crontab schedule can be set to run every other period of time prepara ...

Posted by iamthebugman on Mon, 27 Apr 2020 02:17:59 -0700

Open source distributed task scheduling system ScheduleMaster-v2.0 under. NET Core

It's almost 4 months since the first public introduction of this project in January, during which some repairs have been made and there is no major change in the whole. 2.0 is the first major version update since its release. It brings many new features and fixes some known bug s. Thank you for your comments on blogs, issues and QQ groups, as w ...

Posted by srdva59 on Sun, 26 Apr 2020 19:06:26 -0700

Android development template code (1) -- simply open the gallery and select photos

First, post the sample code //Check permissions public void checkPermission() { if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1); ...

Posted by perfume on Sun, 26 Apr 2020 08:15:21 -0700

Design of CIC filter based on FPGA

Theory and design of single-stage CIC filter Project brief Multi rate signal processing extract Interpolation Fractional multiple extraction and interpolation CIC filter Theoretical derivation of CIC filter Single stage CICI filter Multistage CICI filter FPGA implementation of CIC filter CIC de ...

Posted by highjo on Sat, 25 Apr 2020 19:56:40 -0700

Powershell EWS API delete mixed deployment Office365 and Exchange messages

Environment requirements: Powershell 5.0, plus domain computer Install EWS API to default locationhttps://www.microsoft.com/en-us/download/details.aspx?id=42951 For permission configuration, add the ApplicationImpersonation role in the Exchange management center of Office365 and the Exchange management center and administrator role, and add ...

Posted by darkfunkel on Sat, 25 Apr 2020 08:09:23 -0700

C ා basic knowledge series - 13 introduction to common class library

0. Preface One foreword for each article, introduce the content of this article. The previous contents are all for the introduction of some knowledge points. This article introduces some commonly used classes and namespaces in actual development. This is a series. There are about three or four episodes. Well, that's it. 1. System namespace Syst ...

Posted by danger2oo6 on Fri, 24 Apr 2020 11:05:32 -0700

Note 6: array of compound types

What is an array An array is an ordered sequence of elements, a collection used to store data of the same type. Definition of array 1. Declaration formula (one dimension) 1. Static array typeName arrayName[arraySize]; 2. Dynamic array typeName* arrayName = new typeName[arraySize]; 2. Explanation of array terms Array name There will be a set n ...

Posted by SlimSlyk on Fri, 24 Apr 2020 09:41:27 -0700

Summary -- several methods of generating unique id in JS

Occasionally in development, when it is necessary to generate a unique id, such as adding, deleting or modifying any item of the array many times, it is necessary to add a unique identifier to each item to distinguish. The following are various methods of generating unique identification collected from the network, which are summarized here for ...

Posted by fesan on Fri, 24 Apr 2020 07:13:11 -0700

The java thread pool ThreadPoolExecutor class uses

  In the Alibaba java Development Manual, it is pointed out that thread resources must be provided through thread pools, which do not allow the creation of threads displayed by the application itself. On the one hand, the creation of threads is more standardized and the number of open threads can be reasonably controlled. On the other hand, th ...

Posted by pesoto74 on Thu, 23 Apr 2020 18:10:16 -0700