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3. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

4. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

5. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

6. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

7. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

8. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

9. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

10. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

11. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

12. Discuss with your neighbors logging, assertions, exceptions, defensiveness coupling, and cohesion of this method. /* Sets user as ‘active’ on the server, throws an exception if the * user does not exist on the server */ void activateUserOnServer(String userName) throws CannotActivateException{ log("trying to activate " + userName); assert(isUsernameAcceptable(userName)); boolean isActivated = ServerConnection.activate(userName); if(!isActivated) { throw new CannotActivateException(userName + " not activated"); } Account account = AccountManager.getAccount(userName); account.toggleActivatedStatus(); //mark as activated }

13. V0.1 How?

14. V0.1 How?

15. [extra] Boom! 14

24. [Extra] what you think you can do What you can do What you think you can do

25. V0.1

26. V0.5

28. V0.1 V0.2 V0.3 V0.4 [by next tutorial]

29. Previous lecture: Better design Better documentation Better code better everything! Theme for this week: Improving the product. Improving ourselves.

30. Explain this design in less than 10 words explain {answer} e.g. explain blah blah explain {answer} e.g. explain blah blah 77577 {abstract} Command execute() {abstract} undo() {abstract} Edit execute() undo() execute() undo() Delete execute() undo() execute() undo() Add execute() undo() execute() undo() History add(Command) * Command cmd = createCommand(commandString); cmd.execute(); history.add(cmd); … cmd.undo();