Exercise 4 of SSD 8 -- JAVA

一个基于RMI远程调用方法的事物管理系统。提交的时候JAVADOC忘写清楚了，扣掉了5分——95。
其实从之前的内容过渡到Ex4是很艰难的任务，不过这次作业对于接下来的Exam 2和Exercise 5，甚至Exam 3都有着很大的联系。所以如果这个实验搞定了，后面也就没什么坎儿了。

英文题目如下：
<h3>Background</h3> <p>Build a distributed shared agenda service using Java RMI. Various clients should be able to connect to the shared agenda to query, add, and delete meetings. The server should also have management functionality that allows registration and clearing meetings.</p> <h3>Tasks</h3> <p>Your agenda service should implement the following functionality. Each piece of functionality outlined below must be accessible from the client and be run by the server. </p> <dl>   <dt><strong>User Registration</strong> </dt>   <dd>New users may register. New users must supply a user name and a   password. If the supplied user name is already in use by some other user,   print an error message. Upon successful registration, print a message   stating so.   </dd>   <dt><strong>Adding Meetings</strong> </dt>   <dd>Registered users may add meetings to their agenda. Meetings must be   called between two registered users. A user may not create a meeting without   another user. Parameters should include the start and end times, a label,   and the name of the user with whom the meeting is held. When a meeting is   added, it must appear in the agenda of the user who added it as well as in   the agenda of the user with whom the meeting is held. A user may not <em>   double book</em> another user — if a user already has a meeting that   overlaps with a new meeting, an error should be raised, and no meeting   should be added to the agenda. The user should receive a message indicating   a successful addition or an error if one occurs.   </dd>   <dt><b>Querying Meetings</b> </dt>   <dd>Registered users may look up all meetings in their agenda in a given   interval of time. The parameters should include the start and end times of   the search interval. Return a list of the entries found in the specified   time range. In the list, include the start time, end time, label, and the   name of the user with whom the meeting is held. You should include meetings   that the user has called as well as meetings for which the user has been   registered.   </dd>   <dt><b>Deleting Meetings</b> </dt>   <dd>Registered users may delete entries that they have created. The   parameters should uniquely identify the entry to be deleted as well as the   user who is performing the deletion.   </dd>   <dt>&nbsp; </dt>   <dt><b>Clearing Meetings </b></dt>   <dd>Registered users may clear all meetings they have called. </dd> </dl> <h3>Interface</h3> <p>Write a command-line client that accesses your agenda server. The client must be accessible from command line parameters and via a menu. To access the client via a menu, it must be run as <code>java [clientname] [servername] [portnumer] </code>where <code>[clientname]</code> is the name of your client program, <code> [servername]</code> is the name of the machine where the server is running, and <code>[portnumer]</code> is the port on which the rmiregistry service is running. It is up to you to design an appropriate menu driven interface. To access the above functionality from the command line, assume that the following parameters must be provided to the client.</p> <dl>   <dt><code><strong>java [clientname] [servername] [portnumber] register   [username] [password]</strong></code> </dt>   <dd>Where <code>[clientname]</code> is the name of your client program,   <code>[servername]</code> is the name of the machine where the server is   running, <code>[portnumber]</code> is the port on which rmiregistry is   running, <code>[username]</code> is the log in name chosen by the user, and   <code>[password]</code> is the user's chosen password. <br>   <br> 　</dd>   <dt><code><strong>java [clientname] [servername] [portnumber] add [username]   [password] [otherusername] [start] [end] [title]</strong></code> </dt>   <dd>Where <code>[clientname]</code> is the name of your client program,   <code>[servername]</code> is the name of the machine where the server is   running, <code>[portnumber]</code> is the port on which rmiregistry is   running, <code>[username]</code> is the log in name chosen by the user,   <code>[password]</code> is the user's chosen password, <code>[otherusername]</code>   is the name of the user who the meeting is scheduled with, <code>[start]</code>   is the start time of the meeting, <code>[end]</code> is the end time of the   meeting, and <code>[title]</code> is the meeting's title. <br>   <br> 　</dd>   <dt><code><strong>java [clientname] [servername] [portnumber] query   [username] [password] [start] [end] </strong></code></dt>   <dd>Where <code>[clientname]</code> is the name of your client program,   <code>[servername]</code> is the name of the machine where the server is   running, <code>[portnumber]</code> is the port on which rmiregistry is   running, <code>[username]</code> is the log in name chosen by the user,   <code>[password]</code> is the user's chosen password, <code>[start]</code>   and <code>[end]</code> represent the time interval of interest. <br>   <br> 　</dd>   <dt><code><strong>java [clientname] [servername] [portnumber] delete   [username] [password] [meetingid]</strong></code> </dt>   <dd>Where <code>[clientname]</code> is the name of your client program,   <code>[servername]</code> is the name of the machine where the server is   running, <code>[portnumber]</code> is the port on which rmiregistry is   running, <code>[username]</code> is the log in name chosen by the user,   <code>[password]</code> is the user's chosen password, and <code>[meetingid]</code>   is the identifier of the meeting to be deleted from the agenda. <br>   <br> 　</dd>   <dt><code><strong>java [clientname] [servername] [portnumber] clear   [username] [password]</strong></code> </dt>   <dd>Where <code>[clientname]</code> is the name of your client program,   <code>[servername]</code> is the name of the machine where the server is   running, <code>[portnumber]</code> is the port on which rmiregistry is   running, <code>[username]</code> is the log in name chosen by the user, and   <code>[password]</code> is the user's chosen password. The given user's   agenda must be cleared with this command.</dd> </dl>
[Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]

代码如下：
Meeting.java——事务信息类
相关文件：点这儿打开
RMIInterface.java——管理接口类
相关文件：点这儿打开
RMIClass.java——管理实现类
相关文件：点这儿打开
RMIServer.java——服务器类
相关文件：点这儿打开
RMIClient.java——客户端类
相关文件：点这儿打开

README文件如下：
批处理：
javac *.java
rmic RMIClass
start rmiregistry

运行方法：
java RMIServer <hostname> <port>
java RMIClient <hostname> <port> <args[]>

关于args[]的说明：
1.Register: register [username] [password]
2.Add: add [username] [password] [otherusername] [start] [end] [title]
3.Delete: delete [username] [password] [meetingid].
4.Clear: clear [username] [password]
5.Query: query [username] [password] [start] [end]