Refactoring of AAA app classes

- break up multi compilation unit class
- improve exception handling
- start on general clean up

Change-Id: Ic0b4e19a25c2fc1d64c73bfc4273c82cbcaf5d45

apps/aaa/src/main/java/org/onosproject/aaa/StateMachine.java

@@ -137,7 +137,7 @@ class StateMachine {
      */
     private void createIdentifier() throws StateMachineException {
         log.debug("Creating Identifier.");
-        int index = -1;
+        int index;
 
         try {
             //find the first available spot for identifier assignment
@@ -267,7 +267,7 @@ class StateMachine {
     /**
      * Move to the next state.
      *
-     * @param msg
+     * @param msg message
      */
     private void next(int msg) {
         currentState = transition[currentState][msg];
@@ -280,14 +280,10 @@ class StateMachine {
      * @throws StateMachineException if authentication protocol is violated
      */
     public void start() throws StateMachineException {
-        try {
         states[currentState].start();
         //move to the next state
         next(TRANSITION_START);
         createIdentifier();
-        } catch (StateMachineInvalidTransitionException e) {
-            e.printStackTrace();
-        }
     }
 
     /**
@@ -297,13 +293,9 @@ class StateMachine {
      * @throws StateMachineException if authentication protocol is violated
      */
     public void requestAccess() throws StateMachineException {
-        try {
         states[currentState].requestAccess();
         //move to the next state
         next(TRANSITION_REQUEST_ACCESS);
-        } catch (StateMachineInvalidTransitionException e) {
-            e.printStackTrace();
-        }
     }
 
     /**
@@ -313,7 +305,6 @@ class StateMachine {
      * @throws StateMachineException if authentication protocol is violated
      */
     public void authorizeAccess() throws StateMachineException {
-        try {
         states[currentState].radiusAccepted();
         //move to the next state
         next(TRANSITION_AUTHORIZE_ACCESS);
@@ -330,10 +321,6 @@ class StateMachine {
         }
 
         deleteIdentifier();
-        } catch (StateMachineInvalidTransitionException e) {
-            e.printStackTrace();
-        }
-
     }
 
     /**
@@ -343,14 +330,10 @@ class StateMachine {
      * @throws StateMachineException if authentication protocol is violated
      */
     public void denyAccess() throws StateMachineException {
-        try {
         states[currentState].radiusDenied();
         //move to the next state
         next(TRANSITION_DENY_ACCESS);
         deleteIdentifier();
-        } catch (StateMachineInvalidTransitionException e) {
-            e.printStackTrace();
-        }
     }
 
     /**
@@ -360,13 +343,9 @@ class StateMachine {
      * @throws StateMachineException if authentication protocol is violated
      */
     public void logoff() throws StateMachineException {
-        try {
         states[currentState].logoff();
         //move to the next state
         next(TRANSITION_LOGOFF);
-        } catch (StateMachineInvalidTransitionException e) {
-            e.printStackTrace();
-        }
     }
 
     /**
@@ -384,9 +363,6 @@ class StateMachine {
         return ("sessionId: " + this.sessionId) + "\t" + ("identifier: " + this.identifier) + "\t" +
                 ("state: " + this.currentState);
     }
-}
-
-// FIXME: A source file should contain no more than one top-level entity!
 
     abstract class State {
         private final Logger log = getLogger(getClass());
@@ -480,21 +456,4 @@ class Unauthorized extends State {
     }
 
 
-/**
- * Exception for the State Machine.
- */
-class StateMachineException extends Exception {
-    public StateMachineException(String message) {
-        super(message);
-
-    }
-}
-
-/**
- * Exception raised when the transition from one state to another is invalid.
- */
-class StateMachineInvalidTransitionException extends StateMachineException {
-    public StateMachineInvalidTransitionException(String message) {
-        super(message);
-    }
 }

apps/aaa/src/main/java/org/onosproject/aaa/StateMachineException.java

@@ -0,0 +1,28 @@
+/*
+ *
+ * Copyright 2015 AT&T Foundry
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+package org.onosproject.aaa;
+
+/**
+ * Exception for the State Machine.
+ */
+class StateMachineException extends Exception {
+    public StateMachineException(String message) {
+        super(message);
+
+    }
+}

apps/aaa/src/main/java/org/onosproject/aaa/StateMachineInvalidTransitionException.java

@@ -0,0 +1,27 @@
+/*
+ *
+ * Copyright 2015 AT&T Foundry
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+package org.onosproject.aaa;
+
+/**
+ * Exception raised when the transition from one state to another is invalid.
+ */
+class StateMachineInvalidTransitionException extends StateMachineException {
+    public StateMachineInvalidTransitionException(String message) {
+        super(message);
+    }
+}