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New Message on BDOTNET
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From: G�rard EDMOND
Message 1 in Discussion
Hope someone could clarify me the synchronisation question in Singleton pattern code
of C#
I had created a class as
public sealed class SecuriteManager
{
private static volatile SecurityManager instance;
private static object syncRoot = new Object();
private SecurityManager() { }
public static SecurityManager GetInstance
{
get{
if(null == instance){
lock(syncRoot){
if (instance == null)
instance = new SecurityManager();
}
}
return instance;
}
}
public bool IsAllowed(string UserName)
{
//A very long process here.
//For example access to a webservice which might take 3 seconds.
//HttpContext.Current.Session[UserName] = returnValueFromWebservice;
}
}
My question,
when 2 users access IsAllowed at the same time, is the process thread safe ?
Or should I use lock for each call in my function as
public bool IsAllowed(string UserName)
{
lock(syncRoot)
{
//A very long process here.
//For example access to a webservice which might take 3 seconds.
//HttpContext.Current.Session[UserName] = returnValueFromWebservice;
}
}
Thanks in advance.
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