A component that provides services in response to requests; either a servlet or a JSP page.

The part of a URL passed by an HTTP request to invoke a servlet. A URL path consists of the context path + servlet path + path info, where Context path is the path prefix associated with a servlet context of which the servlet is a part. If this context is the default context rooted at the base of the Web server's URL namespace, the path prefix will be an empty string. Otherwise, the path prefix starts with a / character but does not end with a / character.

Servlet path is the path section that directly corresponds to the mapping that activated this request. This path starts with a / character.

Provides the services and management functions required to support transaction demarcation, transactional resource management, synchronization, and transaction context propagation.

The degree to which the intermediate state of the data being modified by a transaction is visible to other concurrent transactions and data being modified by other transactions is visible to it.Provides the services and management functions required to support transaction demarcation, transactional resource management, synchronization, and transaction context propagation.

An object used by a servlet to track a user's interaction with a Web application across multiple HTTP requests. What is session bean

An enterprise bean that is created by a client and that usually exists only for the duration of a single client-server session. A session bean performs operations, such as calculations or database access, for the client. Although a session bean can be transactional, it is not recoverable should a system crash occur. Session bean objects either can be stateless or can maintain conversational state across methods and transactions. If a session bean maintains state, then the EJB container manages this state if the object must be removed from memory. However, the session bean object itself must manage its own persistent data.

Defines an association between a URL pattern and a servlet. The mapping is used to map requests to servlets.