At 05:38 PM 6/29/00 +0200, you wrote:
>it may not be unique across multiple machines (not jvm), but you can make
>globally unique by adding the InetAddress.
>
>excerpt from the jdk documentation:
>Creates a pure identifier that is unique with respect to the host on which
>it is generated. This UID is unique
>under the following conditions: a) the machine takes more than one second to
>reboot, and b) the machine's
>clock is never set backward. In order to construct a UID that is globally
>unique, simply pair a UID with an
>InetAddress.
>
>Ulf Gohde
>
>
>> -----Original Message-----
>> From: Tolu Agbeja [mailto:[EMAIL PROTECTED]]
>> Sent: Thursday, June 29, 2000 4:06 PM
>> To: [EMAIL PROTECTED]
>> Subject: Re: GUID - Generator for primary key
>> Importance: High
>>
>>
>> The UID in the jdk does not guarantee uniqueness across
>> multiple jvm. To
>> achieve this you are better off using a more complex algorithm.
>>
>> -----Original Message-----
>> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
>> Sent: Thursday, June 29, 2000 5:47 AM
>> To: [EMAIL PROTECTED]
>> Subject: Re: GUID - Generator for primary key
>>
>>
>> In the jdk there is already a class for UID in the jdk. We're
>> using it for
>> primary keys.
>>
>>
>> import java.rmi.server.UID;
>>
>> public class UUID {
>> public static String getUUIDString() {
>> UID id = new UID();
>> return id.toString();
>> }
>>
>> public static byte[] getUUIDBytes() {
>> return getUUIDString().getBytes();
>> }
>>
>> private UUID(){
>> }
>> }
>>
>>
>> Mit freundlichen Gr��en
>> With kind regards
>>
>> Ulf Gohde
>> System Architect
>> CE Computer Equipment AG Fon: +49 (0)521 9318-167
>> Herforder Str. 155a Fax: +49 (0)521 9318-444
>> 33609 Bielefeld E-Mail:[EMAIL PROTECTED]
>> Germany http://www.ce-ag.com
>>
>>
>> > -----Original Message-----
>> > From: Ring, Harald [mailto:[EMAIL PROTECTED]]
>> > Sent: Wednesday, June 28, 2000 10:57 AM
>> > To: [EMAIL PROTECTED]
>> > Subject: GUID - Generator for primary key
>> >
>> >
>> > Hi all,
>> > can anyone tell me where I can get a generator for GUIDs (of
>> > course written
>> > in Java) which produces unique identifiers which are suitable
>> > as PK for
>> > EJBs?
>> >
>> > Thanks a lot H.Ring
>> >
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>> >
>>
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>
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>
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