I read the 18.1 chapter . And I don't understand.
I think the example maybe should be changed as below.
@Name("chatroom")
public class Chatroom {
@In PojoCache pojoCache;
public void join(String username) {
try
{
Set userList = (Set) pojoCache.get("chatroom", "userList");
if (userList==null)
{
userList = new HashSet();
}
userList.add(username);
pojoCache.put("chatroom", "userList", userList);
}
catch (CacheException ce)
{
throw new RuntimeException(ce);
}
}
}
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