Fix issue moquette-io#439 and moquette-io#443

Author: zhangliangbo

broker/src/main/java/io/moquette/broker/MQTTConnection.java

@@ -171,6 +171,8 @@ void processConnect(MqttConnectMessage msg) {
 
             NettyUtils.clientID(channel, clientId);
             LOG.trace("CONNACK sent, channel: {}", channel);
+            postOffice.dispatchConnection(msg);
+            LOG.trace("dispatch connection: {}", msg.toString());
         } catch (SessionCorruptedException scex) {
             LOG.warn("MQTT session for client ID {} cannot be created, channel: {}", clientId, channel);
             abortConnection(CONNECTION_REFUSED_SERVER_UNAVAILABLE);
@@ -257,6 +259,10 @@ void handleConnectionLost() {
             sessionRegistry.disconnect(clientID);
         }
         connected = false;
+        //dispatch connection lost to intercept.
+        String userName= NettyUtils.userName(channel);
+        postOffice.dispatchConnectionLost(clientID,userName);
+        LOG.trace("dispatch disconnection: clientId={}, userName={}", clientID, userName);
     }
 
     void sendConnAck(boolean isSessionAlreadyPresent) {
@@ -284,6 +290,9 @@ void processDisconnect(MqttMessage msg) {
         connected = false;
         channel.close().addListener(FIRE_EXCEPTION_ON_FAILURE);
         LOG.trace("Processed DISCONNECT CId={}, channel: {}", clientID, channel);
+        String userName=NettyUtils.userName(channel);
+        postOffice.dispatchDisconnection(clientID,userName);
+        LOG.trace("dispatch disconnection: clientId={}, userName={}", clientID, userName);
     }
 
     void processSubscribe(MqttSubscribeMessage msg) {

broker/src/main/java/io/moquette/broker/PostOffice.java

@@ -301,4 +301,20 @@ public void internalPublish(MqttPublishMessage msg) {
         }
         retainedRepository.retain(topic, msg);
     }
+
+    /**
+     * notify MqttConnectMessage after connection established (already pass login).
+     * @param msg
+     */
+    void dispatchConnection(MqttConnectMessage msg){
+        interceptor.notifyClientConnected(msg);
+    }
+
+    void dispatchDisconnection(String clientId,String userName){
+        interceptor.notifyClientDisconnected(clientId,userName);
+    }
+
+    void dispatchConnectionLost(String clientId,String userName){
+        interceptor.notifyClientConnectionLost(clientId,userName);
+    }
 }

broker/src/main/java/io/moquette/broker/security/DenyAllAuthorizatorPolicy.java

@@ -21,12 +21,12 @@
 public class DenyAllAuthorizatorPolicy implements IAuthorizatorPolicy {
 
     @Override
-    public boolean canWrite(Topic topic, String user, String client) {
-        return true;
+    public boolean canRead(Topic topic, String user, String client) {
+        return false;
     }
 
     @Override
-    public boolean canRead(Topic topic, String user, String client) {
-        return true;
+    public boolean canWrite(Topic topic, String user, String client) {
+        return false;
     }
 }