[DevExpress] Statistically display a column of data as a histogram

Display results preview: As shown above: The R15101 device is counted according to FAULT/WARNING results in FAULT_LEVEL and displayed in the form of a histogram. Operation steps: (1) Find out the data list from the database according to the specified conditions and count the number of FAULT/WARNING bars with Linq statement, then transmit i ...

Added by kopytko on Wed, 02 Oct 2019 17:14:49 +0300

The maven-jar-plugin configuration of Maven's jar package is detailed and the MANIFEST.MF file is automatically generated.

Introduction to maven-jar-plugin configuration Recently, I learned the springboot multi-module jar package deployment project, and used the maven-jar-plugin plug-in. I'll study it carefully. I won't say much nonsense. Look down. The maven plug-in functions: compile, package, deploy... are all in the ${project. build. directory}/ classes file ...

Added by felodiaz on Wed, 02 Oct 2019 14:41:36 +0300

Node quota, quota management tree, status information in zk

Qutas mainly completes the definition of quota catalogue: Restriction information contains the required size of a path In zk, the directory structure is / zookeeper/quota/xxx/zookeeper_limits State information contains the actual size of a path /zookeeper/quota/xxx/zookeeper_stats And provide the restricted path and state path methods corr ...

Added by receiver on Wed, 02 Oct 2019 00:19:01 +0300

GO Language Function Programming-Closure

GO Language Function Programming-Closure concept GO function closure Functional Programming for Fibonacci Sequences concept The main support of go language for function programming is mainly embodied in closure functions. Functions are first-class citizens: parameters, variables, and return val ...

Added by dmonares on Tue, 01 Oct 2019 12:16:20 +0300

Preliminary Study on OSSIM Sensor Agent Transport Mechanism

The main function of OSSIM Agent is to collect all the data sent by various devices that exist on the network, and then send it to OSSIM Server in a standard way. After collecting the data, Agent should normalize the data before sending it to Server. This paper mainly focuses on how to send the data in an orderly way and how to complete normali ...

Added by winggundamth on Sat, 28 Sep 2019 21:04:55 +0300

Gold, Silver and Ten, Leak Detection and Defect Completion: Java Thread Synchronization and Implementation

PrefaceWhy use Java thread synchronization? Java allows multi-thread concurrency control. When multiple threads operate a shared resource variable at the same time, it will result in inaccurate data and conflict with each other. Therefore, synchronization lock is added to avoid being called by other threads before the thread completes its opera ...

Added by gladius on Fri, 27 Sep 2019 17:10:28 +0300

How to determine whether a string is a number in java

Preface Numbers are often represented and passed by strings in certain fields.So how do we tell if a string is a number?Let's talk about this topic today. Empty characters and null First, it's clear that empty characters''and null are definitely not numbers.We actually write the same logic.Some of the most extreme and easily discernible logica ...

Added by sageman on Fri, 27 Sep 2019 07:56:52 +0300

Introduction to the Use of Lambda Expressions

Written in front This paper mainly introduces the use of Lambda expression and functional interface, and does not involve the principle. It is hoped that the beginners can flexibly use Lambda expression programming in daily development after reading it. Characteristics of Lambda Java 8 adds a completely new language-level feature called Lambda ...

Added by ruiner17 on Thu, 26 Sep 2019 07:36:29 +0300

How to Deploy Application Management/Publishing System Spinnaker on Ali Cloud Container Service ACK

Spinnaker is an open source, multi-cloud, continuous delivery platform that helps you manage applications and deliver applications quickly. Spinnaker's two main functions are: Application management , Application delivery Applications, clusters, and server groups are very important concepts in Spinnaker. Load balancers and firewalls describe ...

Added by Miichael on Wed, 25 Sep 2019 12:04:30 +0300

Common thread pools in JAVA

The core class of the Executor framework is ThreadPoolExecutor, which is the implementation class of the thread pool. See ThreadPoolExecutor Source Parsing .Executors also provides us with four common thread pools, all based on ThreadPoolExecutor and one based on ForkJoinPool. FixedThreadPool Usage ExecutorService fixedThreadPool = Executors.ne ...

Added by konigwolf on Tue, 24 Sep 2019 05:56:40 +0300