How do you configure queues in jms
What is message object? When to use queue and topic?
When we have to use Queue and Topic?
- If there are more than one listener server requesting for the same request in a runnable application, then we have to go for Topic
- If there is only one listener vendor for the Object, then we need to choose Queue.
Need to configure for different appServers. Normally all the appserver has console but you need to configure for Jboss in a xml file. I think it is some JBoss-Jms.xml(not sure) but similar file like this.
What are the three components of a message ?
A message consists of two parts: 1. Data that is sent from one program to another 2. The message descriptor or message header The message descriptor identifies the message (m...
A JMS message consists of three parts:Message header For message identification. For example, the header is used to determine if a given message is appropriate for a "subscriber" Properties For applic...
If durable subscriber is listening, what will happen if a publisher adds a message to factory ?
Nothing will happen to durable subscriber,hence publisher can add n number of messages,the fact is as soon as message is deployed in application server,the registered subscriber only able to listen the message,or else he will be continuing with the previous message.
Can someone elobarate on this!
Decentralized mom and centralizsd mom
What is decentralized mom and centralizsd mom? Give explanation
Centralized MOM means centralized messaging. JMS uses centralized messaging, where every application/client talks to a centralized messaging broker, even for p2p communication. In Decentralized MOM, the clients communicate to each other directly.
How is a Java object message delivered to a non-Java client ?
The Java object message before delivering to the non-java client has to be converted after receiving the message from Queue/Topic using the specification of non-java Client.
What is the difference between point to point and publish/subscribe messaging domains
Messaging is playing an increasingly important role in enterprise computing. Its advantages are a natural result of several factors: the trend toward peer-to-peer computing, greater platform heterogeneity, and greater modularity, coupled with the trend away from synchronous communication between processes....
For example, if you are trying to retrieve Stock symbols, does it come under P2P or Pub/SUb model.
Hi All,I have gone thu the replies from all of you and collectively the difference is correct.P2P and Pub-Sub are two different mechanism. There could be M senders and N receivers in both the cases.In...
What is jms and how jms was designed? What is jvt? What is the use of jvt? How to implement the jvt? (Java value type)
HI, JMS is an JAVA API for writting applications to communicate with Message Queue or Topics. For sending and receiving messages across application servers JMS applications are used....
What is the diffrence between Java mail and jms queue
JavaMail API provides a platform independent and protocol independent framework to build Java technology based email client applications. The JavaMail API provides facilities for reading and sending e...
Java Mail is between system and people, between people and people, between system and file, between people and file... Where as JMS (Java Message Services) is between Java software components...
What is the difference between queue and topic
A connection is created between the client and the server from a connection factory. Connections can be shared by several threads. The user credentials are supplied at this level. It is probably common for a client application to share access to a single connection to the server (unless different security...
Could any one of you give some sample code for JMS and MDB
A point-to-point (PTP) product or application is built around the concept of message queues, senders, and receivers. Each message is addressed to a specific queue, and receiving clients extract messag...
What is the difference between message producer and message consumer
Messaging systems provide a host of powerful advantages over other, more conventional distributed computing models. Primarily, they encourage "loose coupling" between message consumers and message producers. There is a high degree of anonymity between producer and consumer: to the message consumer, it...
There are two types of messagings models. 1.Peer to Peer model (p to p) 2.Publisher to Subscriber(pub-sub) peer to peer model is 1-1 model. In this model one client can...
Message System Types Two messaging systems models are in common use. Publish/Subscribe A publish/subscribe (pub/sub) messaging system supports an event driven model where informat...
What kind of information found in the header of a message ?
The header of a message contains message identification and routing information. This includes , but is not limited to :jmsdestinationjmsdeliverymodejmsmessageidjmstimestampjmsexpirationjmsreplytojmscorrelationidjmstypejmsredeliveredregardssecretcoder
Must I place all my class files in the web-inf folder and all JSP's outside?
Please answer this
1. class files - Either they must be in WEB-INF\classes directory OR you can package them as JAR and put in WEB-INF\lib2. JSP files - Depends how do you design your arch. If you have controller/delega...
yes
How to create a durable subsriber ?
Thanks for the valuable information ....
Having performed the normal setup, an application can create a durable subscriber to a destination. To do this, the client program creates a durable TopicSubscriber, using session.createDurableSubscri...
You can use it in the context of mutithreading but it means JMS is not meant for Multithreading. Its basically meant for object communication. It will be useful when you are writing some event based a...
Sample source code : the producer/consumer example another very good article with sample source code on how Java uses the producer/consumer model to handle images -- an insider's look . Read the article
A producer is the client application that plays the role of a message sender in JMS API.
A consumer is the client application that plays the role of a message receiver in JMS API.
Messaging lets a servlet delegate processing to a batch process either on the same machine or on a separate machine. The servlet creates a message and sends it to a queue. The servlet immediately comp...
The Java message service (jms) defines the standard for reliable enterprise messaging. Enterprise messaging, often also referred to as messaging oriented middleware (mom), is universally recognized as an essential tool for building enterprise applications. By combining Java technology with enterprise...
The Java Message Service is a Java API that allows applications to create, send, receive, and read messages. Designed by Sun and several partner companies, the JMS API defines a common set of interfac...
JMS stands for java messaging services,it is component used to communicate between the two Applications,In a Synchronous or Asynchronous mode.Simillar to the Java Mail,but the difference between the j...
When the network connection between the client and server is lost then JMS provider must try to re-establish the connection. If the JMS provider cannot reconnect, the provider must notify the client....
Yes. You can write a snooper files to detect the service and restart the node upon node fail and a server instance fail.