Java Web Development
Java has a strong support for web development. Java is mostly used for server side programming. Many modern Java web frameworks are based on servlets. A Java web application is a collection of dynamic resources such as Servlets, JavaServer Pages, Java classes and jars and static resources such as HTML pages and pictures. A Java servlet is a Java programming language program that extends the capabilities of a server. Although servlets can respond to any types of requests, they most commonly implement applications hosted on Web servers. Java Class - A class provides the blueprints for objects. So an object is created from a class. In Java, the new key word is used to create new objects.
Advantages of Java:
- Java has good and standardised APIs for transactions (JDBC) and for distributed transactions (JTA)
- JVM platform supports Polyglot programming thereby you can use scripting languages like Scala, Java to build and deploy web applications.
- Apart from platform independence, the main advantage of server-side Java development is the wide selection of libraries and standardized frameworks.
- It is a mature language as it has excellent backward compatibility
- It is a robust language with its garbage collection, very good performance and support for scripting
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Advantage with Promatics
- Our websites developed using Java are easy to use and navigate
- We use Java to create modular programs and reusable code
- We have been able to deliver applications leveraging Java’s Java's robustness, ease of use, cross-platform capabilities and security features
- Multithreading capability for programs to perform several tasks simultaneously within a program.
JAVA Technologies
JBOSS
An application server authored by JBoss, now developed by Red Hat. Jboss also known as WildFly is written in Java, and implements the Java Platform, Enterprise Edition (Java EE) specification. It runs on multiple platforms. It is a free and open source software.
JBOSS Features:
- Clustering
- Deployment API
- Distributed caching (using Infinispan, a standalone project)
- Distributed deployment
- Failover (including Web and EJB sessions)
- Hibernate integration (for persistence programming; Java Persistence API or JPA)
- Java Authentication and Authorization Service (JAAS)
- JBoss Web takes advantage of fast OS-specific features to achieve zero-copy transfer of static content. This decreases CPU load and improves application responsiveness.
Apache Tomcat
Apache Tomcat is an open-source Java Authentication and Authorization Service (JAAS)web server and servlet container developed by the Apache Software Foundation (ASF). Tomcat implements several Java EE specifications including Java Servlet, JavaServer Pages (JSP), Java EL, and WebSocket, and provides a "pure Java" HTTP web server environment for Java code to run in. Tomcat 7.x implements the Servlet 3.0 and JSP 2.2 specifications.[7] It requires Java version 1.6, although previous versions have run on Java 1.1 through 1.5. Versions 5 through 6 saw improvements in garbage collection, JSP parsing, performance and scalability. Native wrappers, known as "Tomcat Native", are available for Microsoft Windows and Unix for platform integration.
Apache Tomcat Features:
- Use of a nonce to prevent cross-site request forgery (CSRF) attacks
- Changing the jsessionid on authentication to prevent session fixation attacks altogether
- Memory leak detection and prevention
- Use of aliases to store static content outside the war file
- Servlet 3.0, JSP 2.2 and JSP-EL 2.2 support
- Easier to embed Tomcat in your applications, e.g. in JBoss
- Asynchronous logging
Spring
The Spring Framework is an open source application framework. It provides a comprehensive programming and configuration model for modern Java-based enterprise applications on different types of deployment platforms. Spring offers infrastructural support at the application.
Spring Features:
- Dependency Injection
- Aspect-Oriented Programming including Spring's declarative transaction management
- Spring MVC web application and RESTful web service framework
- Foundational support for JDBC, JPA, JMS
Hibernate
It is an object-relational mapping framework for the Java language, providing a framework for mapping an object-oriented domain model to a traditional relational database. Hibernate solves object-relational impedance mismatch problems by replacing direct persistence-related database accesses with high-level object handling functions.
Hibernate Features:
- Mapping from Java classes to database tables (and from Java data types to SQL data types).
- Hibernate provides data query and retrieval facilities.
- It generates SQL calls and relieves the developer from manual result set handling and object conversion
- Applications using Hibernate are portable to supported SQL databases with little performance overhead
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