what is linux middleware

In Linux, middleware is an independent system software or service program that allows communication between multiple applications and a database. Its main function is to abstract multiple applications or databases. Integrated into a whole to simplify the development and maintenance of system applications, such as database connection management, network storage management, network communication management, etc. Middleware is widely used in Linux systems, such as Apache, Tomcat, etc. on the server side; MPlayer, Exaile, Amarok, etc. on the client side.

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

What is middleware

Middleware is an independent system software or service program, with the help of which distributed application software Sharing resources between different technologies. Middleware sits on top of the client/server operating system and manages computer resources and network communications. It is software that connects two independent applications or independent systems. Connected systems, even if they have different interfaces, can still exchange information with each other through middleware.

A key way to execute middleware is information transfer. Through middleware, applications can work on multiple platforms or OS environments.

Middleware is software that is between the operating system and application software and provides service functions for application software. It includes message middleware, transaction middleware, application server, etc. Because it is between two types of software, it is called middleware.

Middleware in Linux

With the continuous development of network equipment and network applications, the importance of Linux system middleware is becoming more and more important. protrude. Its main function is to separate and integrate common functions to make the operating system easier to design and implement.

Linux system middleware (Middleware) is an independent software system that allows communication between multiple applications and a database. Its main function is to abstract multiple applications or databases into a whole , to simplify the development and maintenance of system applications, such as database connection management, network storage management, network communication management, etc.

Linux system middleware mainly consists of three parts: client, server and application server. The client accepts data directly from the server on its behalf, and it has functions such as aggregating data requests, maintaining user activities, and implementing user interfaces. The server dispatches data, implements application server interfaces, distributes messages, manages security, coordinates system access and other functions. An application server is a program software that is mainly used to manage user interfaces or have Web-related functions. It is an abstraction layer for application and data access to support the operation of Web applications.

Linux system middleware is widely used in Linux systems. For example, on the server side, it can be used like Apache, Tomcat, etc.; on the client side, it can be like MPlayer, Exaile, Amarok, Rhythmbox, etc.

Commonly used middleware in Linux systems

1. tomcat

is a server software with java language servlet specifications suitable for local development and small projects , or personal development (free open source Web application server), Apache serves HTML pages, and Tomcat actually runs JSP pages and Servlets, but Tomcat's ability to handle static [HTML] is not as good as the Apache server

Features:

• Supports the latest standards (SUN experts often hang out with TOMCAT developers)

• Fast updates

• Cross-platform

• Small size, easy to install and deploy

2. weblogic

Large projects or commercial projects, the dynamic functions of Java and the security of Java Enterprise standards are introduced into the development, integration, deployment and management of large-scale network applications. It is a middleware based on j2ee architecture produced by the American bea company.

Features:

• Simplifies the development of portable and scalable application systems and provides rich interoperability for other applications and systems

• Commercial software with complete and powerful functions, mainly used in large-scale projects of large enterprises

• is a highly scalable architecture system

3. jetty

Some sample projects or small projects (open source servlet container) are written in Java language. Jetty runs quickly and is lightweight. It can be used in In Java, its execution can be controlled from the test case. In this way, [automated testing] no longer relies on the external environment and can successfully realize automated testing

Features:

• Ease of use, scalability, and easy embeddability

• Fast and efficient

4. JBoss

Manage EJB containers and servers (open source projects), JBoss follows Distributed under a commercial-friendly LGPL license and developed by the open source community

Features:

• The application server also has many excellent qualities.

• The memory and hard disk space required is relatively small.

• Easy to install: After decompression, you only need to configure some environment variables.

• Supports "hot deployment". When deploying BEAN, just copy the BEAN JAR file to the deployment path and it will be automatically loaded; if there are changes, it will be automatically updated.

• Boss and the Web server run in the same Java virtual machine, and the Servlet calls the EJB without going through the network, thus greatly improving operating efficiency and improving security performance.

• Users can implement J2EE-EAR directly instead of implementing EJB-JAR and Web-WAR separately before, which is very convenient.

• Jboss supports [cluster].

5. WebSphere

IBM's software platform, which includes writing, running and monitoring 24/7 industrial-strength on-demand Web applications and cross-platform, cross-platform The entire middleware infrastructure required for product solutions, such as servers, services, and tools. WebSphere provides reliable, flexible, and robust software. WebSphere is a modular platform based on industry-supported open standards. Existing assets can be plugged into WebSphere through a trusted and durable interface, allowing you to continue to expand your environment. WebSphere runs on many platforms, including Intel, Linux, and z/OS.

Features:

• Meet the needs of a large number of applications

• Run on a variety of hardware and OS platforms

• Support distributed computing and provide transparent application or service interaction across networks, hardware and OS platforms

• Support standard protocols

• Support standard interface

Related recommendations: "Linux Video Tutorial"

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