Please see this tutorial for an introduction to Spring MVC. In This tutorial we look at the Controllers and View Resolvers. Controller The DispatcherServlet receives request and then passes on the request to the appropriate Controller. The base Controller interface receives HttpServletRequest and HttpServletResponse. Controllers are like struts Action. The implementation of Controller should be … Read more

Please see this tutorial for an introduction to Spring MVC. In this tutorial we describe the various HandlerMapping classes available in Spring HandlerMapping HandlerMapping is an interface that is implemented by all Objects that map the request to the corresponding Handler Object. A HandlerExecutionChain always wraps the Handler and may also contain one or more … Read more

Please see this tutorial for an introduction to Spring MVC. In this tutorial we describe the various HandlerAdapter classes available in Spring HandlerAdapter HandlerAdapter is responsible for actually invoking the handler. The handler is of type Object and hence the dispatcher servlet can handle any Handler type using the HandlerAdapter. Spring provides certain HandlerAdapters that … Read more

Concept Overview Spring has a well developed and highly plugable framework for Web Development. It is based on Model, View and Controller (MVC) Framework. The DispatcherServlet handles the whole show, right from intercepting the request, to delegating the request to appropriate controllers and rendering the view. It follows the FrontController design pattern. To understand the … Read more

Pre-requisite trails Spring Transactions Primer Spring declarative transactions Concept Overview The tutorial on Spring declarative transaction explains how to declare transactions in the xml using the tx namespace. The same namespace also provides an element called &lttx:annotation-driven&gt which can be used be define transactions using annotation. The Transaction Manager can be specified using the transaction-manager … Read more

Pre-requisite trails Spring Transactions Primer Concept Overview Declarative transaction is a spring transaction strategy. The other strategies are programmatic transaction and local transaction. There are two ways to accomplish declarative transaction, through xml or through annotations. In this tutorial we look at xml based declarative transaction. The advantage of a declarative transaction is that all … Read more

Pre-requisite trails Spring Transactions Primer Concept Overview There are predominantly three transaction strategies for spring based transactions – Local Transactions, programmatic transactions and declarative transactions. In this tutorial we look at programmatic transactions. Programmatic transactions give a greater control to the user in setting up the transaction boundaries. It is possible to set up transaction … Read more

What are transaction attributes? Spring transactions allow setting up the propagation behavior, isolation, timeout and read only settings of a transaction. Before we delve into the details, here are some points that need to be kept in mind Isolation level and timeout settings get applied only after the transaction starts. Not all transaction managers specify … Read more

Introduction An understanding of distributed transactions is not required to understand spring transactions, however, we present it here since it would be good to get the complete picture. Many times a transaction spans multiple systems (on separate hosts). For example, a single transaction may involve a messaging system and a database. Distributed transactions must satisfy … Read more

What is a Transaction? Transaction is an activity or group of activities that are performed as a single unit of work. The characteristic of a transaction is that either all the activities that are part of the transaction are performed or none are performed. In other words, even if one of the activity fails then … Read more