javax.websocket.server.PathParam Maven / Gradle / Ivy
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package javax.websocket.server;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* This annotation may be used to annotate method parameters on server endpoints
* where a URI-template has been used in the path-mapping of the {@link ServerEndpoint}
* annotation. The method parameter may be of type String, any Java primitive
* type or any boxed version thereof. If a client URI matches the URI-template,
* but the requested path parameter cannot be decoded, then the websocket's error
* handler will be called.
*
* For example:-
*
* @ServerEndpoint("/bookings/{guest-id}")
* public class BookingServer {
*
* @OnMessage
* public void processBookingRequest(@PathParam("guest-id") String guestID, String message, Session session) {
* // process booking from the given guest here
* }
* }
*
*
* For example:-
*
* @ServerEndpoint("/rewards/{vip-level}")
* public class RewardServer {
*
* @OnMessage
* public void processReward(@PathParam("vip-level") Integer vipLevel, String message, Session session) {
* // process reward here
* }
* }
*
*
* @author dannycoward
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
public @interface PathParam {
/**
* The name of the variable used in the URI-template. If the name does
* not match a path variable in the URI-template, the value of the method parameter
* this annotation annotates is {@code null}.
*
* @return the name of the variable used in the URI-template.
*/
public String value();
}