Smith Jone

You should understand to 48hrs = within 2 days :roll:
48hrs rule is not "MUST".
Fix Your Windows Date(or Linux Date and so on),and You can test this rule.

public boolean bookingTest(Object aSelectedData) { boolean result = false; DataInfo temp = (DataInfo)aSelectedData; String str = temp.getDate(); String [] cal = str.split("/"); int year = Integer.parseInt(cal[0]); int month = Integer.parseInt(cal[1]); int date = Integer.parseInt(cal[2]); Calendar c1 = Calendar.getInstance(); c1.set(year,month-1,date); Date today = new Date(); //difference between today and date available long millis1 = c1.getTimeInMillis(); long millis2 = today.getTime(); long difference = millis1 - millis2; long days = difference/(86400*1000); if( (days >= 0) && (days <= 2) ) { result = true; } else { result = false; } return result; }
[ November 25, 2006: Message edited by: Smith Jone ]

Now,My UrlyBird almost completed except perfect Locking.
Finding Mechanism - Hotel or City / Just Hotel / Just City
If ComboBox is Just hotel & Just city ,another TextField is uneabled & Set Background(GRAY);



[ November 24, 2006: Message edited by: Smith Jone ]

Yes, I use Cookie,just in case.As following code...
How do you implement Locking?

public class LockManager extends Data { private final Map<Integer,Long> lockedRecords = Collections.synchronizedMap(new HashMap()); ..... public synchronized void lock(int recNo) throws RecordNotFoundException { Integer record = new Integer(recNo); Integer lockDB = new Integer(DATABASE_LOCK); long cookieNumber = 0L; if(recNo < 1) throw new RecordNotFoundException(); try { if( recNo == DATABASE_LOCK ) { while( lockedRecords.containsKey(lockDB)) { wait(); } } else { while(isLocked(recNo)) { wait(); } } cookieNumber = Thread.currentThread().hashCode(); lockedRecords.put(record,cookieNumber); } catch (InterruptedException ie) { System.out.println("Locking Fail : " + recNo); System.out.println(ie.getMessage()); } }


But,Cookie is a good-for-nothing so far.
[ November 21, 2006: Message edited by: Smith Jone ]

1. we don't need to store a cookie
2. we don't need to have a datastructure that stores key value pairs (we can use an arraylist instead for example)
3. we can put a cookie in if we want to in the way you described

OK,I understood that you said.
Of course,You should use arraylist or vector in Locking method.
But, You&I may have a datastructure that stores key value paris.
Because Anything will do. (in this case - Locking mechanism)


By the way,You applied Object Adapter Pattern in Database,too ??


https://coderanch.com/t/188772/java-developer-SCJD/certification/Adapter-Pattern
[ November 21, 2006: Message edited by: Smith Jone ]

My Program has Two interface(DBMain,DBClient);

public interface DBMain { public void read(int recNo) throws RecordNotFoundException; } public interface DBClient { public void read(int recNo) throws IOException; }

AdapterDB is Adapter Class

package suncertify.db ... public class AdapterDB implements DBClient { private static Data database = null; public AdapterDB (String dbPath) { database = new Data(dbPath); } public void read(int recNo) throws IOException { databse.read(recNo); } }
Data(Data Access) is Adaptee Class
package suncertify.db public class Data implements DBMain { public void read(int recNo) throws RecordNotFoundException{ //To-do } }


Because I must implement Sun supplied interface(DBMain),
So Data class implement DBMain. Make sence??
I must throws IOException in interface as DBClient-interface which declare IOException.It doesn't exist in Sun supplied interface(DBMain)
Because RemoteImplement class must declare RemoteException about Data methods.

Is this Object Adapter Pattern for Sloving these problems??


[Edited topic title. Believe me, nothing is "Important" on JavaRanch, unless we say so ]
[ November 21, 2006: Message edited by: Smith Jone ]
[ November 21, 2006: Message edited by: Barry Gaunt ]

Hi,Keith Jones

I don't have the Cookie in my UrlyBird version.you too
But, other versions have the cookie.

public void lock(int recNo,int cookie) throws RecordNotFoundException

We don`t need to make a cookie beacuse of aother version.

If you want to make cookie,Look at the following code.

cookieNumber = Thread.currentThread().hashCode(); lockedRecords.put(record,cookieNumber);

Cheer up Jones


[ November 21, 2006: Message edited by: Smith Jone ]

If you need to throw checkable exceptions you can :
1.Run in panic up and down
2.subclass the RecordNotFoundException
3.chain them in RunTimeException.
4.The same like 1 but now with a relaxed air.

What is the "panic up and down & relawed air" ?? Could you explain it for me ?
If I have subclass the RecordNotFoundException,Can I declear the RemoteException on Remote Interface??

How chain them in RuntimeException ??

Following I implement Data Class.

package suncertify.db; public interface DBMain { public String [] read(int recNo) throws RecordNotFoundException; public void update(int recNo, String [] data) throws RecordNotFoundException; public int [] find(String [] criteria) throws RecordNotFoundException; public void lock(int recNo) throws RecordNotFoundException; public void unlock(int recNo) throws RecordNotFoundException; public boolean isLocked(int recNo) throws RecordNotFoundException; } ---------------------------- package suncertify.db; import java.io.*; import java.util.*; public interface DBMainEx { public String [] read(int recNo) throws RecordNotFoundException,IOException; public void update(int recNo, String [] data) throws RecordNotFoundException,IOException; public DataInfo getRecord(int recNo) throws RecordNotFoundException,IOException; public List<DataInfo> getRecordAll() throws IOException; public int [] find(String [] criteria) throws RecordNotFoundException,IOException; public void lock(int recNo) throws RecordNotFoundException,IOException; public void unlock(int recNo) throws RecordNotFoundException,IOException; public boolean isLocked(int recNo) throws RecordNotFoundException,IOException; } --------------------------------------- package suncertify.db; import java.io.*; import java.util.*; import java.util.concurrent.locks.*; import java.util.logging.*; public class Data implements DBMain,DBMainEx {

Data implements DBMain,DBMainEx
If IOException isn't added on DBMainEx,I get a Complie failureoverridden method does not throw java.rmi.RemoteException
Because RemoteExcepion is subclass of IOException.
Do you Understand?

Origianlly, DBMain extended DBMainEx.And Class Data implements DBMainEx.
public class Data implements DBMainEx {

But,I changed for RemoteException(subclass of IOException).
package suncertify.server; import java.rmi.Remote; import java.rmi.RemoteException; import suncertify.db.*; import java.util.*; import java.io.*; public interface DataDBRemote extends Remote,DBMainEx{ public String [] read(int recNo) throws RemoteException, RecordNotFoundException; public DataInfo getRecord(int recNo) throws RemoteException,RecordNotFoundException; public List<DataInfo> getRecordAll() throws RemoteException,IOException; public int [] find(String [] criteria) throws RemoteException,RecordNotFoundException; public void update(int recNo, String [] data) throws RemoteException,RecordNotFoundException; public void lock(int recNo) throws RemoteException,RecordNotFoundException; public void unlock(int recNo) throws RemoteException,RecordNotFoundException; public boolean isLocked(int recNo) throws RemoteException,RecordNotFoundException; }

Do I receive a cut in marks ? by marker
Is that Automatic Failures??

instructions.html
Any unimplemented exceptions in this interface must all be created as member classes of the suncertify.db package. Each must have a zero argument constructor and a second constructor that takes a String that serves as the exception's description.

[ November 20, 2006: Message edited by: Smith Jone ]

[ November 20, 2006: Message edited by: Smith Jone ]
[ November 20, 2006: Message edited by: Smith Jone ]

Why do I'll get a lower score on the GUI part ??

Do I receive a cut in marks ? by marker

Is it all right??

This Column(Record No.) has to exist to display correct TableModel interacting with Data class(DB records) and The "Record No." field act the Primary Key.

It is very important to me.

ok?

Again ~

Do I receive a cut in marks ? by marker

Is it all right??
[ November 15, 2006: Message edited by: Smith Jone ]

Hi~ nice meet you , I am first-time visit in Javaranch.
I am English well..Sorry
This is my Gui.
I added "Record NO."field in Jtable.

Is this no problem?? Do I receive a cut in marks ? or not ?

Answer me,please ~
Good Day



[ November 15, 2006: Message edited by: Smith Jone ]