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Permission denied creating Singleton in GLOBAL.ASAhaving some odd issues In my GLOBAL.ASA, I have an <OBJECT> element specifying the relevant ProgID with RUNAT=Server and SCOPE=Application However, although this works fine for some classes, I get a permission denied error for classes from a particular DLL. The error response is:- Active Server Pages error '8002802b' Create object failed ? An error occurred while creating object 'oTest'. Microsoft VBScript runtime error '800a0046' Permission denied: 'oTest' /test/utilities/test.asp, line 11 Apart from all the failing classes being in one of two particular DLLs, I can't see what the pattern is. All the DLLs (working and non-working are written in VB6) Can anyone see a possible cause? Tony Proctor "Tony Proctor" <tony_proctor@aimtechnology_NoMoreSPAM_.com> schrieb im Hi Toni,Newsbeitrag news:O8%23$U5kEIHA.4028@TK2MSFTNGP02.phx.gbl... have you seen (and tested) my Shared-Memory-Example wich I've posted yesterday? Works very well across the IIS-STAs with very good performance (no marshaling involved). To wrap the approach in a way, that it works (with a binary chop) somehow like a dictionary should be no problem - you will end up with a lean Dictionary-Connector-Class, wich works against a shared Memory-Store, independent in wich STA this Class would be instantiated. Regarding your global.asa-question I have no idea. From my tests yesterday I've at least found, that it is somehow important to stop the service using: net stop iisadmin /y before any change in the "Dll-Environment". and to start it after that using: net start w3svc Stopping and (re)starting in the server-manager was somehow not sufficient. But that one you probably already know. Olaf I did see your example Olaf but it wasn't really applicable for what I need.
I actually have a VB class that stores multiple Dictionary objects in an array - one per "resource" being cached. Each Dictionary could have 20k-30k items in it. Hence, the problem with memory usage, and why I need a hashed lookup rather than a binary chop. It's that encapsulating VB class that I really want as a singleton. I can't directly add a VB object to the Application collection, but I can if it was created via the <OBJECT> element in GLOBAL.ASA....or so the theory goes. Interestingly, the two DLLs it fails with are physically under the virtual root of the web application. All the ones that work are located outside of that directory tree. Also, if I specify a similar class from a different version of the DLL (e.g. MyProj32.ClassName where MyProj32 is under a different virtual root) then it works without error too Nothing appears in the event log, and it works if the DLL is running in the IDE. Tony Proctor Show quoteHide quote "Schmidt" <s**@online.de> wrote in message news:emqmzNmEIHA.1184@TK2MSFTNGP04.phx.gbl... > > "Tony Proctor" <tony_proctor@aimtechnology_NoMoreSPAM_.com> schrieb im > Newsbeitrag news:O8%23$U5kEIHA.4028@TK2MSFTNGP02.phx.gbl... > > Hi Toni, > > have you seen (and tested) my Shared-Memory-Example > wich I've posted yesterday? > Works very well across the IIS-STAs with > very good performance (no marshaling involved). > To wrap the approach in a way, that it works > (with a binary chop) somehow like a dictionary > should be no problem - you will end up with > a lean Dictionary-Connector-Class, wich works > against a shared Memory-Store, independent > in wich STA this Class would be instantiated. > > Regarding your global.asa-question I have no idea. > From my tests yesterday I've at least found, that > it is somehow important to stop the service using: > net stop iisadmin /y > before any change in the "Dll-Environment". > and to start it after that using: > net start w3svc > > Stopping and (re)starting in the server-manager was > somehow not sufficient. > > But that one you probably already know. > > Olaf > > You probably don't want to be putting apartment-threaded objects in
Application. http://www.aspfaq.com/show.asp?id=2053 Tony Proctor wrote: Show quoteHide quote > I did see your example Olaf but it wasn't really applicable for what > I need. I actually have a VB class that stores multiple Dictionary > objects in an array - one per "resource" being cached. Each > Dictionary could have 20k-30k items in it. Hence, the problem with > memory usage, and why I need a hashed lookup rather than a binary > chop. It's that encapsulating VB class that I really want as a > singleton. > > I can't directly add a VB object to the Application collection, but I > can if it was created via the <OBJECT> element in GLOBAL.ASA....or so > the theory goes. Interestingly, the two DLLs it fails with are > physically under the virtual root of the web application. All the > ones that work are located outside of that directory tree. Also, if I > specify a similar class from a different version of the DLL (e.g. > MyProj32.ClassName where MyProj32 is under a different virtual root) > then it works without error too > > Nothing appears in the event log, and it works if the DLL is running > in the IDE. > > Tony Proctor > > "Schmidt" <s**@online.de> wrote in message > news:emqmzNmEIHA.1184@TK2MSFTNGP04.phx.gbl... >> >> "Tony Proctor" <tony_proctor@aimtechnology_NoMoreSPAM_.com> schrieb >> im Newsbeitrag news:O8%23$U5kEIHA.4028@TK2MSFTNGP02.phx.gbl... >> >> Hi Toni, >> >> have you seen (and tested) my Shared-Memory-Example >> wich I've posted yesterday? >> Works very well across the IIS-STAs with >> very good performance (no marshaling involved). >> To wrap the approach in a way, that it works >> (with a binary chop) somehow like a dictionary >> should be no problem - you will end up with >> a lean Dictionary-Connector-Class, wich works >> against a shared Memory-Store, independent >> in wich STA this Class would be instantiated. >> >> Regarding your global.asa-question I have no idea. >> From my tests yesterday I've at least found, that >> it is somehow important to stop the service using: >> net stop iisadmin /y >> before any change in the "Dll-Environment". >> and to start it after that using: >> net start w3svc >> >> Stopping and (re)starting in the server-manager was >> somehow not sufficient. >> >> But that one you probably already know. >> >> Olaf -- Microsoft MVP -- ASP/ASP.NET Please reply to the newsgroup. The email account listed in my From header is my spam trap, so I don't check it very often. You will get a quicker response by posting to the newsgroup. I've read that Bob but this object has to be a Singleton
Tony Proctor Show quoteHide quote "Bob Barrows [MVP]" <reb01501@NOyahoo.SPAMcom> wrote in message news:OqSQ6rmEIHA.4400@TK2MSFTNGP05.phx.gbl... > You probably don't want to be putting apartment-threaded objects in > Application. > http://www.aspfaq.com/show.asp?id=2053 > > Tony Proctor wrote: > > I did see your example Olaf but it wasn't really applicable for what > > I need. I actually have a VB class that stores multiple Dictionary > > objects in an array - one per "resource" being cached. Each > > Dictionary could have 20k-30k items in it. Hence, the problem with > > memory usage, and why I need a hashed lookup rather than a binary > > chop. It's that encapsulating VB class that I really want as a > > singleton. > > > > I can't directly add a VB object to the Application collection, but I > > can if it was created via the <OBJECT> element in GLOBAL.ASA....or so > > the theory goes. Interestingly, the two DLLs it fails with are > > physically under the virtual root of the web application. All the > > ones that work are located outside of that directory tree. Also, if I > > specify a similar class from a different version of the DLL (e.g. > > MyProj32.ClassName where MyProj32 is under a different virtual root) > > then it works without error too > > > > Nothing appears in the event log, and it works if the DLL is running > > in the IDE. > > > > Tony Proctor > > > > "Schmidt" <s**@online.de> wrote in message > > news:emqmzNmEIHA.1184@TK2MSFTNGP04.phx.gbl... > >> > >> "Tony Proctor" <tony_proctor@aimtechnology_NoMoreSPAM_.com> schrieb > >> im Newsbeitrag news:O8%23$U5kEIHA.4028@TK2MSFTNGP02.phx.gbl... > >> > >> Hi Toni, > >> > >> have you seen (and tested) my Shared-Memory-Example > >> wich I've posted yesterday? > >> Works very well across the IIS-STAs with > >> very good performance (no marshaling involved). > >> To wrap the approach in a way, that it works > >> (with a binary chop) somehow like a dictionary > >> should be no problem - you will end up with > >> a lean Dictionary-Connector-Class, wich works > >> against a shared Memory-Store, independent > >> in wich STA this Class would be instantiated. > >> > >> Regarding your global.asa-question I have no idea. > >> From my tests yesterday I've at least found, that > >> it is somehow important to stop the service using: > >> net stop iisadmin /y > >> before any change in the "Dll-Environment". > >> and to start it after that using: > >> net start w3svc > >> > >> Stopping and (re)starting in the server-manager was > >> somehow not sufficient. > >> > >> But that one you probably already know. > >> > >> Olaf > > -- > Microsoft MVP -- ASP/ASP.NET > Please reply to the newsgroup. The email account listed in my From > header is my spam trap, so I don't check it very often. You will get a > quicker response by posting to the newsgroup. > > "Tony Proctor" <tony_proctor@aimtechnology_NoMoreSPAM_.com> schrieb im I'd say, that you could adapt the approach very easyNewsbeitrag news:OM7$QemEIHA.5980@TK2MSFTNGP04.phx.gbl... > I did see your example Olaf but it wasn't really applicable > for what I need. to your problem. > I actually have a VB class that stores multiple Dictionary That's also no problem, since you could hold separate> objects in an array - one per "resource" being cached. > Each Dictionary could have 20k-30k items in it. Arrays (as much as you want) for each resource. I assume, your current Dictionaries store simple StringKey<->SingleValue-Pairs for each resource (accessing each Value over the hashed StringKey). You can do exactly the same with my approach, and you could even store StringKey<->MutipleRecordValues without any problems as long as the RecordValues only contain simple Types (Strings, Longs, Doubles, etc.). > Hence, the problem with memory usage, and why I need The binary chop was meant to work on the (sorted)> a hashed lookup rather than a binary chop. StringKeys of each "Record-Entry" and if implemented right, retrieving Values by Key or a check for KeyExists is processed at the same speedlevel as the hashed lookup of the MS-ScriptingDictionary or the VB-Collection. In fact the keyed-access would be *much* faster in your special case, than working against a *marshaled* singleton- object, because of the non-existent OLE-Call-overhead. If you work readonly against your Resource-Caches, you wouldn't even need to implement CriticalSection- based locking with this approach. In the current example there is also an defined entry- point for the STA, wich is the first user of the shared cache - at this point you could fill all your data into each of the Resource-Caches. But I understand, that you want to avoid coding-effort and that reusing your already existing Resource-Cache- Class as a singleton would be the easiest way (if you manage, to get proper singleton-instancing in global.asa). Just let me know, when the marshaled singleton-approach doesn't work as you imagine - would enhance the example then with "multiple Resource-Caching-capabilities" + some appropriate KeyExists and GetRecordByKey-Methods for the multiple Resource-Caches. Olaf
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"Tony Proctor" <tony_proctor@aimtechnology_NoMoreSPAM_.com> wrote in message Have you confirmed that a simple CreateObject in a test.asp works for thenews:O8%23$U5kEIHA.4028@TK2MSFTNGP02.phx.gbl... > I need to create a process Singleton object for an ASP application, but I'm > having some odd issues > > In my GLOBAL.ASA, I have an <OBJECT> element specifying the relevant ProgID > with RUNAT=Server and SCOPE=Application > > However, although this works fine for some classes, I get a permission > denied error for classes from a particular DLL. The error response is:- > > Active Server Pages error '8002802b' > Create object failed > ? > An error occurred while creating object 'oTest'. > Microsoft VBScript runtime error '800a0046' > Permission denied: 'oTest' > /test/utilities/test.asp, line 11 > > Apart from all the failing classes being in one of two particular DLLs, I > can't see what the pattern is. All the DLLs (working and non-working are > written in VB6) > > Can anyone see a possible cause? > class? Have you checked the access control on the dll (IOW could this genuinely be a permission denied)? What isolation level are you using? Is this at all a sane thing to do anyway? If the object is in an STA what actually gets stored in application object? -- Anthony Jones - MVP ASP/ASP.NET I'm using "High" isolation (this is currently under IIS5 on a W2K box)
I can confirm that a 'New' operator and a CreateObject call both work from an ASP script. Also, if I instantiate the objects with Session scope via GLOBAL.ASA then it works. It only seems to fail like this with Application scope. I've also tried specifying CLASSID= instead of PROGID= in the GLOBAL.ASA but the results were the same. The rationale for this is that I need a "singleton" object. I don't care how I achieve this but it must be callable from any other ASP thread. The cross-thread calls are a necessary penalty since that singleton will use a considerable amount of VM for a global cache. I cannot afford to have that duplicated in every apartment. Tony Proctor Show quoteHide quote "Anthony Jones" <A**@yadayadayada.com> wrote in message news:OYgSQwoEIHA.1056@TK2MSFTNGP03.phx.gbl... > "Tony Proctor" <tony_proctor@aimtechnology_NoMoreSPAM_.com> wrote in message > news:O8%23$U5kEIHA.4028@TK2MSFTNGP02.phx.gbl... > > I need to create a process Singleton object for an ASP application, but > I'm > > having some odd issues > > > > In my GLOBAL.ASA, I have an <OBJECT> element specifying the relevant > ProgID > > with RUNAT=Server and SCOPE=Application > > > > However, although this works fine for some classes, I get a permission > > denied error for classes from a particular DLL. The error response is:- > > > > Active Server Pages error '8002802b' > > Create object failed > > ? > > An error occurred while creating object 'oTest'. > > Microsoft VBScript runtime error '800a0046' > > Permission denied: 'oTest' > > /test/utilities/test.asp, line 11 > > > > Apart from all the failing classes being in one of two particular DLLs, I > > can't see what the pattern is. All the DLLs (working and non-working are > > written in VB6) > > > > Can anyone see a possible cause? > > > > Have you confirmed that a simple CreateObject in a test.asp works for the > class? > Have you checked the access control on the dll (IOW could this genuinely be > a permission denied)? > What isolation level are you using? > > Is this at all a sane thing to do anyway? If the object is in an STA what > actually gets stored in application object? > > -- > Anthony Jones - MVP ASP/ASP.NET > >
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"Tony Proctor" <tony_proctor@aimtechnology_NoMoreSPAM_.com> wrote in message In an early post you I think you said that you have other classes built withnews:ex34etvEIHA.5328@TK2MSFTNGP05.phx.gbl... > I'm using "High" isolation (this is currently under IIS5 on a W2K box) > > I can confirm that a 'New' operator and a CreateObject call both work from > an ASP script. Also, if I instantiate the objects with Session scope via > GLOBAL.ASA then it works. It only seems to fail like this with Application > scope. I've also tried specifying CLASSID= instead of PROGID= in the > GLOBAL.ASA but the results were the same. > > The rationale for this is that I need a "singleton" object. I don't care how > I achieve this but it must be callable from any other ASP thread. The > cross-thread calls are a necessary penalty since that singleton will use a > considerable amount of VM for a global cache. I cannot afford to have that > duplicated in every apartment. > VB that you were able to successfully create with an object tag with an application scope? Can you confirm that is so? Normally any attempt to assign an object in an STA into the application object would fail. I think Schmidt was directing you to a more complex but more scalable solution. What happens when the thread on which the object was created is currently busy processing an ASP script which potentially may take some time? Have you checked the permissions on the DLL and anything the class initialise may need to access. Ensure that such resources allow IWAM_<machinename> and IUSR_<machinename> appropriate access. -- Anthony Jones - MVP ASP/ASP.NET The DLLs are already part of a working application. It's true that you
cannot directly assign an apartment-threaded object into the Application variables (you get an error) but you can create such an object with SCOPE=Application via the <OBJECT> tag in GLOBAL.ASA I can create objects with SCOPE=Application from other DLLs, and - once created - I can even add them to the Application collection. However, the DLLs I really want are located under the virtual root of the application, and they fail as indicated. Oddly, I can do this with classes from a different version of the same application, from a physically separate directory, but that's of no practical use. The code for this class already exists, although it's not used as a singleton yet. It would be a huge task to re-write it to use shared memory and mutexes as it currently uses objects Tony Proctor Show quoteHide quote "Anthony Jones" <A**@yadayadayada.com> wrote in message news:ugLuRMwEIHA.5228@TK2MSFTNGP05.phx.gbl... > "Tony Proctor" <tony_proctor@aimtechnology_NoMoreSPAM_.com> wrote in message > news:ex34etvEIHA.5328@TK2MSFTNGP05.phx.gbl... > > I'm using "High" isolation (this is currently under IIS5 on a W2K box) > > > > I can confirm that a 'New' operator and a CreateObject call both work from > > an ASP script. Also, if I instantiate the objects with Session scope via > > GLOBAL.ASA then it works. It only seems to fail like this with Application > > scope. I've also tried specifying CLASSID= instead of PROGID= in the > > GLOBAL.ASA but the results were the same. > > > > The rationale for this is that I need a "singleton" object. I don't care > how > > I achieve this but it must be callable from any other ASP thread. The > > cross-thread calls are a necessary penalty since that singleton will use a > > considerable amount of VM for a global cache. I cannot afford to have that > > duplicated in every apartment. > > > > > In an early post you I think you said that you have other classes built with > VB that you were able to successfully create with an object tag with an > application scope? Can you confirm that is so? Normally any attempt to > assign an object in an STA into the application object would fail. > > I think Schmidt was directing you to a more complex but more scalable > solution. What happens when the thread on which the object was created is > currently busy processing an ASP script which potentially may take some > time? > > Have you checked the permissions on the DLL and anything the class > initialise may need to access. Ensure that such resources allow > IWAM_<machinename> and IUSR_<machinename> appropriate access. > > > > > -- > Anthony Jones - MVP ASP/ASP.NET > >  
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