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Environment: Cent OS 7.0 (Virtual Machine Environment), Nginx 1.9.8, Redis 3.2.1 1. Background When using Nginx+Tomcat for load balancing, because Nginx distributes different requests to a Tomcat, Tomcat runs in different containers, because session s are out of sync or lost. 2. Installation and Configuration of Nginx 1. Nginx I ...

Upper segment After concurrency is introduced, starting with this section, we will explore some of the dynamic features of Java, including reflection, class loaders, annotations, and dynamic proxies. With these features, some flexible and general functions can be implemented in an elegant way, often used in various frameworks, libraries and sys ...

1. Introduction Quratz is the most mature and widely used java task scheduling framework with powerful functions and flexible configuration. It plays an important role in enterprise applications. The way quratz is used in cluster environment is a problem that every enterprise system should consider. As early as 2006, there was a discussion on q ...

spring mvc file upload needs to rely on commons-io and commons-fileupload to achieve together premise Assuming that the dependencies, configurations, etc. on spring mvc are normal and usable, that part is not explained in this article. rely on Managing with maven requires dependencies that include <dependency> <groupId>co ...

Preface: Project Environment This simple demo is based on the spring MVC framework. The deployment environment is tomcat, which is used in the previous section. bootstrap+jquery_file_upload Components. The way to store pictures is to store them in the virtual directory and return them to the virtual directory. It is suggested to match Spring MV ...

Question 1: http status 500 Description: When the project switched to Tomcat 7, there was a problem with message push implemented by amq. Most of the requests sent by amq.js were 500, only a few were 200. Analysis: Under Servlet 2.5 container, the servlet component supports asynchronous communication by default, but it needs to be open ...

1. Maven dependence No additional dependencies need to be introduced, just the starter required by Spring Boot: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> 2. Log format Without modifying the default settings, Spring Boot ...

Relevant Reading SAML 2.0 Introduction Guide This article has introduced the basic information of the SAML protocol. Today we will begin to explain OpenSaml, an open source implementation of the SAML protocol. SAML What's OpenSAML OpenSAML is a dependency library that facilitates the use of SAML messages. Its main functions include: Create S ...

Note that the description in this article is only applicable to PC-side Web development based on Ionic. If it is mobile-side development, you can try to use Uglify JS2 only for compression. Whether there will be any improvement, please verify by yourself, at least the file will load faster when it is smaller. C 1. Questions 1.1. The f ...

Background Introduction The operating system is Linux CentOS 6.5, JDK is 1.7.0_79 and JBoss version is 4.3.0.GA. The R&D and testing environment needs to enable multiple JBoss service instances on one machine at the same time. When the application is deployed for startup, port conflicts are found. II. Solutions 1. Solution 1: P ...