Scoping and Synchronization

[No One]

I have an object that needs to have a global scope within my ASP.Net
application. As I can find no way to make this a server component that
has a global scope, I have given it a static constructor for
initializing its inner parts. This is an id generator object for
inserting rows into a particular table (for various reasons the DBA
cannot make this table have a db server generated id). My concern stems
from the calls to the static getNextId() method. How do I do something
similar to Java's synchronized so that only one call happens to this
method at a time to avoid a race condition?

Thanks.

[Hermit Dave]

you could use lock keywork to allow only one thread to access the code at a
given point. the other threads will be placed in a queue.

if the id generation is just an incremental value then you can use interlock
class. it has a method called increment.

--

Regards,

Hermit Dave (D'way)
http://hdave.blogspot.com

(I hear what you're saying.. but lets try it my way first)

"No One" <no***@yahoo.com> wrote in message
news:41***************@yahoo.com...

I have an object that needs to have a global scope within my ASP.Net
application. As I can find no way to make this a server component that
has a global scope, I have given it a static constructor for
initializing its inner parts. This is an id generator object for
inserting rows into a particular table (for various reasons the DBA
cannot make this table have a db server generated id). My concern stems
from the calls to the static getNextId() method. How do I do something
similar to Java's synchronized so that only one call happens to this
method at a time to avoid a race condition?

Thanks.

[Jeff Louie]

To No One in Particular...

http://www.geocities.com/jeff_louie/OOP/oop4.htm

A Static Counter

Here is the classic example of a static counter that is zero based. It
contains a
static field "uniqueID" and a thread safe static method "GetUniqueID"
that
increments the unique ID:

/// <summary>
/// Summary description for TestStatic.
/// </summary>
class TestStatic
{
*** // static stuff
*** private static int uniqueID= 0;
*** private static int GetUniqueID()
*** {
******* lock(typeof(TestStatic))
******* {
*********** return uniqueID++; // returns zero at start
******* }
*** }
*** // member stuff
*** private int identity;
*** public TestStatic()
*** {
******* this.identity= TestStatic.GetUniqueID();
*** }
*** public int Identity
*** {
******* get
******* {
*********** return identity;
******* }
*** }
}

public class Test
{
**** /// <summary>
*** /// The main entry point for the application.
*** /// </summary>
**** [STAThread]
*** static void Main(string[] args)
*** {
******* //
******* // TODO: Add code to start application here
******* //
******* TestStatic ts1= new TestStatic();
******* TestStatic ts2= new TestStatic();
******* Console.WriteLine(ts1.Identity.ToString());
******* Console.WriteLine(ts2.Identity.ToString());
******* Console.ReadLine();
*** }
}

Regards,
Jeff

My concern stems from the calls to the static getNextId() method. How

do I
do something similar to Java's synchronized so that only one call
happens to
this method at a time to avoid a race condition?<
*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!