Apache Tomcat is a Servlet Container
Apache Tomcat is an open source software implementation of the Java Servlet and JavaServer Pages technologies. The Java Servlet Specification defines a standard for running Java Servlets. A Servlet is a Java program that runs in a Web container (typically a servlet engine, such as Apache Tomcat) and handles requests from clients, typically web browsers. A Server Page is a file containing both static HTML and dynamic Java code. Together, servlets and server pages are used to create Web applications.
Apache Tomcat is developed and maintained by the Apache Software Foundation (ASF). The ASF is a nonprofit corporation founded in 1999 to provide organizational, legal, and financial support for the Apache open-source software projects. The ASF also incubates new projects, supports the development of community-driven standards, and protects the "Apache Way" of open-source development. Apache Tomcat is one of many projects overseen by the ASF.
Tomcat was created in 1997 by James Duncan Davison while working at Cornell University. Davison named the project after the Thomas cat videos he had seen online. The first official release was in 1998. Tomcat was originally developed as a standalone application server but it has been increasingly used as a component of larger application architectures, often alongside Apache HTTP Server and the Apache Axis SOAP stack.
Tomcat 8 is the latest stable release of Tomcat. It features support for Java 8 features such as lambdas and streams, updated HTTP/2 implementation, upgraded Commons Runtime library, and more. Tomcat 8 is fully compatible with Java 7 and earlier versions but it is recommended that you use it with Java 8 to take advantage of its new features.
Tomcat 9 is under development and scheduled for release in late 2017 or early 2018. It will include significant enhancements such as support for HTTP/2 Client Connections, Servlet 4 Async Methods support, upgraded Commons Runtime Library, and more.
Tomcat is a Java SE servlet container that implements the Java Servlet Specification
Tomcat is an open source Java Servlet container developed by the Apache Software Foundation. It is released under the terms of the Apache License 2.0. Tomcat implements the Java Servlet Specification, and provides a "personal" web server for development and testing purposes.
Tomcat is one of the most popular Java servlet containers. According to W3Techs, as of September 2017, it was used by 67% of all website that use Java servlets.
The latest version of Tomcat is 9.0.0, which was released on December 12, 2017.
Tomcat Server 8 Released
The Apache Software Foundation has announced the release of Tomcat Server 8.0, a web server and servlet container. The new release includes a number of enhancements and updates, including HTTP/2 support, the ability to run multiple instances of the server on a single machine, and performance improvements.
HTTP/2 is a new version of the HTTP protocol that provides many benefits over the current version, HTTP/1.1. HTTP/2 supports multiplexing, which allows multiple requests to be sent over a single TCP connection, and server push, which allows the server to push resources to the client before it has asked for them. These features can improve page load times for users and reduce network congestion.
Tomcat Server 8 also includes support for Java Servlet 4.0 and JavaServer Pages (JSP) 2.3. These updates improve performance and add features such as support for WebSockets and multi-tenancy. In addition, Tomcat Server 8 includes a number of other enhancements and bug fixes.
For more information on Tomcat Server 8, see the Apache Software Foundation website: https://tomcat.apache.org
Apache Tomcat Updated to Version 9
The Apache Software Foundation has announced the release of Tomcat 9, the latest version of its popular Java servlet container.
Tomcat 9 represents a significant update to the project, with more than 1,600 commits from over 100 contributors. The most notable new feature is support for HTTP/2, the newly ratified successor to HTTP/1.1.
HTTP/2 brings a number of enhancements, such as header compression and server push, that promise to improve the performance and scalability of web applications. Tomcat 9 is one of the first open source projects to add support for HTTP/2.
In addition to HTTP/2 support, Tomcat 9 introduces a number of other new features and improvements:
-
Added support for WebSockets with conditional TLS. This allows secure WebSocket communication when both client and server share a common TLS certificate authority.
-
Updates to the Connector architecture that allow for multiple concurrent connections on a single connector instance. This should improve performance when using Tomcat with frameworks like Spring or Play that use multiple threads per connection.
-
A new Valve that allows an external process to be notified whenever a request is made to a configured URL. This can be used, for example, to monitor application health or send alerts when requests are made to suspect URLs.
-
Support for Java 8 Lambdas in JNDI name lookups and attribute initialization. This makes it easier to write code that uses Java 8 features in Tomcat-managed environments.
As with any major release, there are also numerous bug fixes and minor improvements in Tomcat 9. Full details can be found in the changelog [1].
Tomcat is one of the most popular servlet containers in use today, with a large user base and ecosystem of related projects. Upgrading can be daunting for some users, but thanks to Apache's extensive testing process Tomcat 9 is likely to be as stable as previous releases. If you're looking to upgrade your applications to take advantage of HTTP/2 or other new features in Tomcat 9, be sure to check out the migration guide [2] first!
Getting Started with Apache Tomcat
In this tutorial we will explore how to get started with Apache Tomcat. We will cover the basics of installing and setting up Tomcat, as well as some of the more common configuration options.
Installing Apache Tomcat
The first step is to install Apache Tomcat. There are several ways to do this, but the easiest is to use a package manager like Yum or Aptitude. If you are using Windows, you can download an installer from the Tomcat website.
Once you have installed Apache Tomcat, you will need to start it. The location and name of the startup script varies depending on your operating system and installation method. On Ubuntu or Debian systems, the startup script is called tomcat8.sh and it is located in /usr/bin . You can start Tomcat by running:
sudo ./tomcat8.sh start
On Windows, the startup script is called tomcat8w.exe and it is located in C:\Program Files\Apache Software Foundation\Tomcat 8.0\bin . To start Tomcat, run:
C:\Program Files\Apache Software Foundation\Tomcat 8.0\bin\tomcat8w.exe start
You should see a message similar to the following:
Tomcat started on port(s): 8080 (http) with context Path=/
In order to stop TomCat, you can run: sudo ./tomcat8.sh stop C:\Program Files\Apache Software Foundation\Tomcat 8.0\bin\tomcat8w.exe stop If you want to see a list of all available TomCat commands, you can run: sudo ./tomcat8.sh help C:\Program Files\Apache Software Foundation\TomCat 8.0\bin\tomcat8w -help ## Configuration Options There are a number of configuration options that you may want to tweak to suit your needs. The most common ones are discussed below. ### Container directory By default, Apache Tomcat stores its data in a directory called conf inside the home directory of the user running TomCat (e.g., ~/.conf on Linux or C:\Users\<username>\.conf on Windows). You can change this by setting the container_directory attribute in your server.xml file: container_directory parameter to /opt/apache-tomkat-9. Any files or directories placed in this directory will be used by TomCat instead of the default location. ### Connectors By default, Apache Tomata uses two connectors: a HTTP connector and an AJP connector(used for communicating with upstream servers). You can change these settings by editing your server.xml file:
కామెంట్లు లేవు:
కామెంట్ను పోస్ట్ చేయండి