Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

JMS: Truely asynchronize?

Posted on 2009-06-28
7
Medium Priority
?
390 Views
Last Modified: 2012-05-07
I quoted following text from website:
http://static.springframework.org/spring/docs/1.2.x/reference/jms.html#d0e13240

My questions is how to get truely asynchronize call? When receiving message, JMS seems to use one thread to keep asking whether message is arrived or not?


18.4.2. Synchronous Receiving

While JMS is typically associated with asynchronous processing, it is possible to consume messages synchronously. The overloaded receive methods provide this functionality. During a synchronous receive the calling thread blocks until a message becomes available. This can be a dangerous operation since the calling thread can potentially be blocked indefinitely. The property receiveTimeout specifies how long the receiver should wait before giving up waiting for a message.
0
Comment
Question by:JianJunShen
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 86

Assisted Solution

by:CEHJ
CEHJ earned 200 total points
ID: 24732459
JMS can be completely asynchronous. The 'other end' doesn't even need to be connected all the time and you can't get more asynchronous than that
0
 
LVL 92

Assisted Solution

by:objects
objects earned 400 total points
ID: 24732649
>  JMS seems to use one thread to keep asking whether message is arrived or not?

That doesn't make it synchronous, that technique wcould still process message asynchronously.
And how it handles receiving the message is dependent on the server implementation, not JMS itself.
0
 
LVL 40

Accepted Solution

by:
mrjoltcola earned 1400 total points
ID: 24732695
Not disagreeing with the 2 statements above, but I think both are not addressing your specific question.

JMS is just another messaging service. In virtual all messaging services (from low level sockets to MQ Series) the differentiation from syncrhonous to asynchronous messaging model has to do with:

1) polling/looping/explicitly checking for messages (syncrhonous)
2) registering a listener and a callback mechanism (asynchonous)

We are discussing asynchronous in terms of receiving the message, not handling the message. Either model can asynchronously _handle_ the method, but that is outside the JMS model at that point.

The point to be clear on is the URL you refer to is a classic synchronous polling method, not a callback method.
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 

Author Comment

by:JianJunShen
ID: 24733377
Refer to mrjoltcola message, where is tutorial for 2) registering a listener and a callback mechanism (asynchonous)?
0
 
LVL 40

Assisted Solution

by:mrjoltcola
mrjoltcola earned 1400 total points
ID: 24733387
0
 
LVL 40

Assisted Solution

by:mrjoltcola
mrjoltcola earned 1400 total points
ID: 24733393
I believe the book "Spring into Action" also has a good section on it, but my book is at the office so I cannot verify. I recommend buying the book if you are using Spring in your projects. It covers many useful things.

0
 
LVL 92

Assisted Solution

by:objects
objects earned 400 total points
ID: 24733399
> http://static.springframework.org/spring/docs/1.2.x/reference/jms.html#d0e1324

Thats a bit out of date btw
Do you specifically need to use 1.2?
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

After being asked a question last year, I went into one of my moods where I did some research and code just for the fun and learning of it all.  Subsequently, from this journey, I put together this article on "Range Searching Using Visual Basic.NET …
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.
Suggested Courses

618 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question