JavaSpaces™ Principles, Patterns, and Practice

10.3. The Account

Our account entry holds two basic pieces of information about a user: a username and a password. Here is how the account entry is defined:

public class AccountEntry implements Entry {
  public String username;
  public String password;

  public AccountEntry() {
  }

  public AccountEntry(String username) {
    this.username = username;
  }

  public AccountEntry(String username, String password) {
    this.username = username;
    this.password = password;
  }
}

The AccountEntry is a simple entry, having fields for the username and password and a couple constructors. An account entry is used as follows: When a user logs into the service for the first time, the messenger creates a new account entry and writes it into the space. This acts to reserve a unique ...