JavaSpaces™ Principles, Patterns, and Practice

10.5. Friends List

We still have two components of the user distributed data structure to cover—the friends list and the channel. As we saw in Section 10.3, part of creating a new user account is setting up a FriendsListEntry object. This object maintains a list of the friends you'd like to keep track of and communicate with. To create a friends list, the Account code first instantiates a FriendsList object (which is a wrapper class used to deal with FriendsListEntrys objects), and calls its create method.

Before looking at the FriendsList object, let's look at the FriendsListEntry:

 public class FriendsListEntry implements Entry { public String username; public Vector list; public FriendsListEntry() { } public FriendsListEntry(String username) ...