Out of curiosity I'd like to build a simple websockets tyrus server chat project with javac and libraries in -classpath.
Yes, I know that this is not the standard way (mvn is), but I'm doing it as a proof of concept. I manage to get project built but it throws a NullPointerException
Code is:
ChatMain.java:
package chat;
import java.io.IOException;
import java.util.Collections;
import java.util.Map;
import javax.websocket.DeploymentException;
import org.glassfish.tyrus.server.Server;
public class ChatMain {
public static void main(String[] args) throws DeploymentException,
IOException {
Map<String, Object> properties = Collections.emptyMap();
Server server = new Server("localhost", 8080, "/ws", properties,
ChatEndPoint.class);
System.out.println(server);
try {
server.start();
System.in.read();
} finally {
server.stop();
}
}
}
ChatEndPoint.java:
package chat;
import java.io.IOException;
import java.util.Map;
import java.util.HashMap;
import java.util.Collections;
import javax.websocket.OnClose;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
import org.json.*;
@ServerEndpoint("/chat")
public class ChatEndPoint {
private static Map<String, Session> peers = Collections.synchronizedMap(new HashMap<String, Session>());
@OnOpen
public void onOpen(Session peer) {
System.out.println("onOpen");
}
@OnMessage
public void onMessage(String message, Session peer) throws IOException {
System.out.println("onMessage");
JSONObject json = new JSONObject(message);
String nick = (String) json.get("nick");
boolean newClient = json.has("action") && ((String) json.get("action")).equals("add");
synchronized(peers) {
// Iterate over the connected sessions
// and broadcast the received message
for (Map.Entry<String, Session> entry : peers.entrySet()) {
if (newClient) {
JSONObject json1 = new JSONObject(json, new String[] { "action" }).put("nick", entry.getKey());
peer.getBasicRemote().sendText(json1.toString());
}
entry.getValue().getBasicRemote().sendText(message);
}
}
if (newClient)
peers.put(nick, peer);
}
@OnClose
public void onClose(Session peer) {
System.out.println("onClose");
peers.values().remove(peer);
}
}
javac line:
javac -cp chat/javax.websocket-api-1.1.jar:chat/tyrus-server-1.12.jar:chat/tyrus-spi-1.12.jar:chat/tyrus-core-1.12.jar:chat/grizzly-framework-2.3.22.jar:chat/grizzly-http-server-2.3.22.jar:chat/tyrus-container-grizzly-server-1.12.jar:chat/json.jar: chat/ChatMain.java
java line:
java -cp chat/javax.websocket-api-1.1.jar:chat/tyrus-server-1.12.jar:chat/tyrus-spi-1.12.jar:chat/tyrus-core-1.12.jar:chat/grizzly-framework-2.3.22.jar:chat/grizzly-http-server-2.3.22.jar:chat/tyrus-container-grizzly-server-1.12.jar:chat/json.jar: chat.ChatMain
runtime error:
Exception in thread "main" java.lang.NullPointerException
at org.glassfish.tyrus.container.grizzly.server.GrizzlyServerContainer$1.stop(GrizzlyServerContainer.java:228)
at org.glassfish.tyrus.server.Server.stop(Server.java:231)
at chat.ChatMain.main(ChatMain.java:23)
I understand that this can be done
Interestingly, more libraries are needed. If I include all libraries in
websocket-ri-archive-1.12.zip
bundle, it works well. Definitely, a builder is the way to go