CODEWITHSUNDEEP
javaservletsjbossclient
Rakesh
Rakesh

Reputation: 43

sockets in servlets

I have a java client that sends a message to the server .The server is a servlet deployed on jboss. My question is can the servlet send data back to the client as acknowledgment? is it possible in servlets?

Upvotes: 0

Views: 3841

Answers (5)

4b0
4b0

Reputation: 22323

From Java EE 5 tutorial chapter 4:

What Is a Servlet?

A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers. For such applications, Java Servlet technology defines HTTP-specific servlet classes.

Upvotes: 2

Nrj
Nrj

Reputation: 6831

An http servlet works on http request and can send back the http response. You can connect to it using URLConnection as described above.

If you don't want to get at this level (layer), you can work at with the packets directly (using sockets). Here you dont need a servlet actually. Here your server (a simple java application) will listen on a socket for any incoming connection and the client can connect to it.

Upvotes: 1

manocha_ak
manocha_ak

Reputation: 902

Ashwinm if you are looking for posting a result to a socket (on client) and not returing the result through mormal HTTP response.

Which I believe is not a servlet question then. You can anyway do anything in java. But have to look at normal "how to write to a socket" tutorial.

GenreicServlet might provide some extensibility or some solution.

EDIT

I read your commentes below later. Yes you need URLConnection in that case at the bare minimum.

Upvotes: 1

Mark Peters
Mark Peters

Reputation: 81074

Of course it's possible; a servlet that didn't have the ability to send data back to the client wouldn't be very useful.

There are many ways to do so but the most "raw" way is by writing to ServletResponse.getOutputStream(). The ServletResponse is passed to the service method of a Servlet implementation. Note that the data is of course going to be sent back as a valid HTTP response (identified using MIME, etc).

Upvotes: 1

Aravind Yarram
Aravind Yarram

Reputation: 80176

Yes it is possible with servlets. Read the basics here.

Upvotes: 1

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