Examples for Chapter 13 - RESTful Java with JAX-RS 2.0 - page 327

new InputStreamReader ( System . in ));
String message = br . readLine ();
target . request (). post ( Entity . text ( name + ": " + message ));

new

}

We simply read from stdin until the user hits Enter and then do an HTTP POST request to
the chat service with the command-line input.

The Server Code

The server side is doing a lot of different things to implement our chat service. Let's break it
down:

src/main/java/com/restfully/shop/services/CustomerChat.java

@Path ( "chat" )
public public class class CustomerChat CustomerChat

{

class class Message Message

{

String id ;
String message ;
Message next ;

}

The CustomerChat class is annotated with @Path to specify the root resource path of our
JAX-RS service. It then declares a simple inner class called Message that will represent the
queued chat messages. A message is represented by a String id and a String message ,
and also contains a reference to the next queued Message .

protected protected Message first ;

protected protected Message last ;

The service remembers what the current first and last message is. It stores these in the first
and last member variables of the class.

protected protected int int maxMessages = 10 ;

protected protected LinkedHashMap < String , Message > messages =

new new LinkedHashMap < String , Message >()

{

@Override
protected protected boolean boolean removeEldestEntry ( Map . Entry < String , Message > eldest )

{

boolean boolean remove = size () > maxMessages ;

iif ( remove ) first = eldest . getValue (). next ;
return

return remove ;