Oracle trail notes

Oracle trail learning experience stored procedure Annotate a custom column name Incoming parameters: field name and annotation create or replace procedure csp_col_comment ( p_column_name varchar, --Field name p_Title varchar, --field comment p_RetVal Out integ ...

Posted by techjosh on Sat, 13 Jun 2020 23:52:50 -0700

Technology sharing | review MySQL's MTS

Author: Hong bin The person in charge and technical service director of akerson South District, MySQL ace, is good at database architecture planning, fault diagnosis, performance optimization analysis, with rich practical experience, helping customers in various industries to solve MySQL technical problems, and providing overall MySQL solutio ...

Posted by rurouni on Thu, 11 Jun 2020 01:26:48 -0700

Spring Security dry goods: how to implement different security policies for different interfaces

1. Preface Welcome to Read Spring Security Actual Dry Goods Series articles.Recently, a small development partner asked an interesting question.He is working on a project that involves two styles, one is to interface applets and use stateless JWT Token securely, the other is to manage the backend using Freemarker, the Session mechanism that do ...

Posted by mazen on Wed, 10 Jun 2020 19:21:26 -0700

mybatis Source Parsing Interpretation Level 1 and Level 2 Cache

mybatis cache Mybatis caches have a first-level cache and a second-level cache. Why do mybatis use two caching mechanisms?Let's move on to today's topic with questions. mybatis Level 1 Cache When the mybatis cache executes the same SQL and the same parameters, it does not make repeated calls to the ...

Posted by dudeddy on Wed, 10 Jun 2020 09:29:36 -0700

python crawling Douban short film review + CI Yun

1, requests+lxml non login crawling Douban data 1. First, open Douban and find the url of the short movie review you want to crawl, for example:2. Open the developer tools in the web page, and most computers can press F12 directly, but there are also differences. For example, ThinkPad uses Fn+F12 to open, find the network in the page - > cli ...

Posted by jpopuk on Tue, 09 Jun 2020 22:25:09 -0700

Centos7 deploy Nginx load balancing Tomcat server and session sharing architecture

brief introduction load balancing Load balancing is based on the existing network structure, which provides a cheap, effective and transparent way to expand the bandwidth of network equipment and servers, increase throughput, strengthen the capacity of network data processing, and improve the flexibi ...

Posted by TKirahvi on Tue, 09 Jun 2020 21:50:10 -0700

Django - Lifecycle of Requests & Templates & Routing

Lifecycle requested in Django 1. Overview First, we know that all data transferred in HTTP requests and server responses is strings. In Django, when we visit a url, we enter the corresponding html page through route matching. Django's request life cycle is what happens behind the scenes when a user enters a url into the browser and the user see ...

Posted by strangebeer on Tue, 09 Jun 2020 19:18:49 -0700

Read and understand Filter filter

Filter filter What is a Filter Use of Filter Filter lifecycle FilterConfig class FilterChain filter chain Interception path of Filter What is a Filter 1.Filter filter is one of the three components of javaWeb. Servlet program, Listener listener, filter filter 2. It is an interface 3. Function: f ...

Posted by dandaman2007 on Sat, 06 Jun 2020 23:30:08 -0700

High Availability Scheme Implementation of MySQL Master Replication+keepalived

1 Preface One MySQL host in the production environment has a single point of failure, so we want to make sure that MySQL is highly available, that is, two MySQLsServer If one of the MySQL servers hangs up, the other can take over immediately. MySQL's highly available solutions are generally as follows: keepalived+dual master MHA PXC MMM Hear ...

Posted by jwbworks on Fri, 05 Jun 2020 18:17:35 -0700

Teach you to use Python: batch download downhill to tiktok video watermark ~

Tiktok: This article introduces how to use Python crawler to pick up all the videos of your favorite patten (including two kinds of watermark and no watermark). Love is the best way to get your favorite video. Tiktok has been uploaded to the official account. Reply: you can get it by shaking. 1, G ...

Posted by Inkyskin on Thu, 04 Jun 2020 20:56:40 -0700