iot tp3 coap

iot/tp3/occitanium-client/src/Main.java

@@ -0,0 +1,39 @@
+import org.eclipse.californium.core.CoapClient;
+import org.eclipse.californium.core.CoapHandler;
+import org.eclipse.californium.core.CoapResponse;
+
+public class Main {
+    public static void main(String[] args) throws InterruptedException {
+        var light_client = new CoapClient("coap://localhost:5683/light");
+        var lamp_client = new CoapClient("coap://localhost:5683/light/lamp");
+        while (true) {
+            var relation = light_client.observe(new LampUpdateHandler(lamp_client));
+            relation.wait();
+        }
+    }
+}
+
+class LampUpdateHandler implements CoapHandler {
+    static String ON = "On";
+    static String OFF = "Off";
+
+    CoapClient lamp_client;
+    public LampUpdateHandler(CoapClient lamp_client_) {
+        lamp_client = lamp_client_;
+    }
+
+    @Override
+    public void onLoad(CoapResponse coapResponse) {
+        var content = coapResponse.getResponseText();
+        var level = Integer.parseInt(content);
+        System.out.println("Light at " + level);
+        var state = OFF;
+        if (level < 5) state = ON;
+        System.out.println("Sending state " + state);
+    }
+
+    @Override
+    public void onError() {
+        System.err.println("Owno :s");
+    }
+}