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an actionform is a javabean that extends orgapachestrutsactionactionform actionform handles the session state for web application and the
the action class is type of the model and is a wrapper around the business logic the purpose of action class is to change the httpservletrequest to
jakarta struts is open source execution of mvc model-view-controller pattern for the development of web based applications jakarta struts is robust
model-view-controller mvc is a design pattern put together to help control change mvc decouples interface from business logic and data model the
in preemptive scheduling the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into
in rpc the method invoker waits for the method to finish implementation and return the control back to the invoker therefore it is completely
point-to-point ptp this model permits exchanging messages via queues formed for some purposes a client can send and receive messages from one or
what is asynchronous messaging queueans asynchronous messaging includes a client that does not wait for a message from the server an event is used to
synchronous messaging involves a client that waits for the server to respond to a message so if one end is down the whole communication will
jms is the ideal high-performance messaging stage for intra business messaging with full programmatic control over quality of service and delivery
the jms provider handles security of the messages data conversion and the client triggering the jms provider verifies the level of encryption and the
messaging is a method of communication among software components or applications a messaging system is a peer-to-peer facility a messaging client can
which models are supported by jms please explain themans publish or subscribe pubsub this model permits a client publisher to send messages to a jms
with publish or subscribe message passing the sending application or client establishes a named topic in the jms broker or server and publishes
a preconfigured jms object a resource manager connection factory or a destination formed by an administrator for the use of jms clients and placed in
one of the principal benefits of jms messaging is that its asynchronous thus not all the pieces require to be up all the time for the application to
a point-to-point model is based on the concept of a message queue senders send messages into the queue and the receiver reads messages from this
java message service an interface executed by most j2ee containers to give point-to-point queueing and topic publishsubscribe behavior jms is
how do i prevent the output of my jsp or servlet pages from being cached by the browserans you will require to set the appropriate http header
static resources should always be contained using the jsp include directive this way the inclusion is performed just once during the translation
a stored procedure is a set of statementscommands which reside in the database the stored procedure is pre-compiled and keeps the database the effort
sqlwarning objects are a subclass of sqlexception that deal with database access warnings warnings do not stop the implementation of an application
can we use the constructor instead of init to initialize servletans yes of course you can use the constructor instead of init theres nothing to stop
java server pages jsp is a platform independent presentation layer technology that comes with sun s j2ee platform jsps are normal html pages with