我有实现客户端和服务器之间的通用接口的服务器类。我有多个远程对象绑定到不同的 rim 注册表（差异端口和 rim_id）。客户端将根据clientID 查找注册表，例如如果clientID 是EXE1111，那么它应该连接到EXE 服务器远程对象。我希望每个服务器对象都有自己的哈希表来存储客户端提供的数据。这是服务器代码::
enter code here
public class StationServers extends UnicastRemoteObject implements StationService{
private static final long serialVersionUID = 8119533223378875144L;
private String criminalRecordID="CR";
private String missingRecordID="MR";
private int count=11111;
protected StationServers() throws RemoteException {
super();
}
public static void main(String args[]){
try {
bindSPVMServer(new StationServers());
bindSPLServer(new StationServers());
bindSPBServer(new StationServers());
System.out.print("Servers are up and running on ");
System.out.println(InetAddress.getLocalHost().getHostName());
} catch (Exception e) {
System.err.println("Server start up error: "+e.getMessage());
e.printStackTrace();
}
}
private static void bindSPVMServer(StationServers spvmObject) {
try {
Registry reg = LocateRegistry.createRegistry(Constants.SPVM_RMI_PORT);
reg.bind(Constants.SPVM_RMI_ID, spvmObject);
} catch (Exception e) {
e.printStackTrace();
}
}
private static void bindSPLServer(StationServers splObject) {
try {
Registry reg = LocateRegistry.createRegistry(Constants.SPL_RMI_PORT);
reg.bind(Constants.SPL_RMI_ID, splObject);
} catch (Exception e) {
e.printStackTrace();
}
}
private static void bindSPBServer(StationServers spbObject) {
try {
Registry reg = LocateRegistry.createRegistry(Constants.SPB_RMI_PORT);
reg.bind(Constants.SPB_RMI_ID, spbObject);
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void createCRecord(String firstName, String lastName,
String description, RecordStatus status) throws RemoteException {
}
@Override
public void createMRecord(String firstName, String lastName,
String address, String lastDate, String lastLocation,
RecordStatus status) throws RemoteException {
// TODO Auto-generated method stub
}
@Override
public String getRecordCounts() throws RemoteException {
// TODO Auto-generated method stub
return null;
}
@Override
public void editCRecord(String lastName, String recordID,
RecordStatus newStatus) throws RemoteException {
// TODO Auto-generated method stub
}
}
客户代码::
enter code here
public class OfficerClients implements Runnable{
public static void showMenu() {
System.out.println("\n****Welcome to DPIS****\n");
System.out.println("Please select an option (1-5)");
System.out.println("1. Create Criminal Record");
System.out.println("2. Create Missing Record");
System.out.println("3. Get Records Count");
System.out.println("4. Edit Record");
System.out.println("5. Exit");
}
public static void main(String[] args) {
try {
if (System.getSecurityManager() == null)
System.setSecurityManager(new RMISecurityManager());
new Thread(new OfficerClients()).start();
} catch (Exception e) {
e.printStackTrace();
}
}
private static RecordStatus getRecordStatus(String status, int userChoice) {
if (userChoice == 1) {
if (RecordStatus.CAPTURED.name().equals(status))
return RecordStatus.CAPTURED;
else if (RecordStatus.ONTHERUN.name().equals(status))
return RecordStatus.ONTHERUN;
else
throw new IllegalArgumentException("Invalid status for Criminal Record");
} else if (userChoice == 2) {
if (RecordStatus.FOUND.name().equals(status))
return RecordStatus.FOUND;
else if (RecordStatus.MISSING.name().equals(status))
return RecordStatus.MISSING;
else
throw new IllegalArgumentException("Invalid status for Missing Record");
} else if (userChoice == 3) {
if (RecordStatus.CAPTURED.name().equals(status))
return RecordStatus.CAPTURED;
else if (RecordStatus.ONTHERUN.name().equals(status))
return RecordStatus.ONTHERUN;
else if (RecordStatus.FOUND.name().equals(status))
return RecordStatus.FOUND;
else if (RecordStatus.MISSING.name().equals(status))
return RecordStatus.MISSING;
}
throw new IllegalArgumentException("No Enum specified for this string");
}
private static StationService getRemoteObjectStub(String stationName) {
String url = "rmi://localhost:";
Remote lookup = null;
try {
if ("SPVM".equals(stationName))
url += Constants.SPVM_RMI_PORT;
else if ("SPL".equals(stationName))
url += Constants.SPL_RMI_PORT;
else if ("SPB".equals(stationName))
url += Constants.SPB_RMI_PORT;
url += "/" + stationName;
System.out.println("URL==" + url);
if (url != null && !url.isEmpty())
lookup = Naming.lookup(url);
} catch (Exception e) {
e.printStackTrace();
}
return (StationService) lookup;
}
@Override
public void run() {
int userChoice = 0;
String firstName = "", lastName = "", description = "", address = "", lastDate = "", lastLocation = "", badgeID = "", recStatus = "", recordID = "";
RecordStatus status;
String requestBadgeID = "Please enter your unique BadgeID: ";
String requestRecordID = "Please enter RecordID: ";
String requestFName = "First Name: ";
String requestLName = "Last Name: ";
String requestDesc = "Description of Crime: ";
String requestAddress = "Last Known Address: ";
String requestDate = "Date last seen: ";
String requestPlace = "Place last seen: ";
String requestStatus = "Status: ";
String requestNewStatus = "New Status: ";
showMenu();
BufferedReader br = new BufferedReader(new InputStreamReader(
System.in));
try{
while (true) {
Boolean valid = false;
System.out.print(requestBadgeID);
badgeID = br.readLine().toUpperCase();
System.out.println(badgeID);
String stationName = badgeID.replaceAll("[0-9]", "").trim();
System.out.println(stationName);
StationService server = getRemoteObjectStub(stationName);
while (!valid) {
try {
System.out.print("Enter your choice: ");
userChoice = Integer.parseInt(br.readLine());
valid = true;
} catch (Exception e) {
System.out
.println("Invalid Input, please enter an integer: ");
valid = false;
}
}
switch (userChoice) {
case 1:
System.out.print(requestFName);
firstName = br.readLine().trim().toUpperCase();
System.out.print(requestLName);
lastName = br.readLine().trim().toUpperCase();
System.out.print(requestDesc);
description = br.readLine().trim().toUpperCase();
System.out.print(requestStatus);
recStatus = br.readLine().trim().toUpperCase()
.replaceAll("\\s+", "");
status = getRecordStatus(recStatus, userChoice);
server.createCRecord(firstName, lastName, description,
status);
showMenu();
break;
case 2:
System.out.print(requestFName);
firstName = br.readLine().trim().toUpperCase();
System.out.print(requestLName);
lastName = br.readLine().trim().toUpperCase();
System.out.print(requestAddress);
address = br.readLine().trim().toUpperCase();
System.out.print(requestDate);
lastDate = br.readLine().trim().toUpperCase();
System.out.print(requestPlace);
lastLocation = br.readLine().trim().toUpperCase();
System.out.print(requestStatus);
recStatus = br.readLine().trim().toUpperCase()
.replaceAll("\\s+", "");
status = getRecordStatus(recStatus, userChoice);
server.createMRecord(firstName, lastName, requestAddress,
lastDate, lastLocation, status);
showMenu();
break;
case 3:
String recordCounts = server.getRecordCounts();
System.out.println(recordCounts);
showMenu();
break;
case 4:
System.out.print(requestLName);
lastName = br.readLine().trim().toUpperCase();
System.out.print(requestRecordID);
recordID = br.readLine().trim().toUpperCase();
System.out.print(requestNewStatus);
recStatus = br.readLine().trim().toUpperCase()
.replaceAll("\\s+", "");
status = getRecordStatus(recStatus, userChoice);
server.editCRecord(lastName, recordID, status);
showMenu();
break;
case 5:
System.out.println("Have a nice day!");
br.close();
System.exit(0);
default:
System.out.println("Invalid Input, please try again.");
}
}
}catch(Exception e){
e.printStackTrace();
}
}
}
我是 RMI 新手，所以我不知道如何维护每个远程对象并根据客户端请求调用并将记录存储在哈希表中（每个远程对象）。
请帮忙...