[英]how do I pass a parameter to the @OnOpen method with JEE7 Websockets,
I have this code 我有这个代码
@ServerEndpoint(value = "/websocket")
public class Service {
private String clientId;
@OnOpen
public void init(Session session) throws IOException {
//opening a websocket
// get clientId
clientId = // Code here to get initialization parameter.
}
}
How do I get initialization parameters from the client opening the socket?. 如何从打开套接字的客户端获取初始化参数?
Depends what do you mean by initialisation parameter. 取决于初始化参数的含义。 You can do something like this: 你可以这样做:
@ServerEndpoint(value = "/websocket/{clientId}")
public class Service {
private volatile String clientId;
@OnOpen
public void init(@PathParam("clientId") String clientId, Session session) throws IOException {
this.clientId = clientId;
}
}
Then you have do use following URL to access your endpoint: ws://host/contextPath/websocket/[clientId]
. 然后,您使用以下URL访问您的端点: ws://host/contextPath/websocket/[clientId]
。
if you use query parameters, please see Session#getQueryString()
. 如果使用查询参数,请参阅Session#getQueryString()
。
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