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OutputCache(CacheProfile) RSS

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Last post Nov 08, 2012 05:18 AM by oak_silver

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MysticW

Member

14 Points

7 Posts
OutputCache(CacheProfile)

Nov 07, 2012 01:58 AM|LINK
split from: http://forums.asp.net/t/1810343.aspx/1?OutputCache+CacheProfile+

I'm stumped as to how to solve it from the solution above. I've tried various combinations and nothing works with IIS 7. Selecting the 'ServerAndClient' would enable Client Caching -- but do nothing for the Server side!?!?

Here's what I've defined (perhaps mine is slightly different because I use a Session State mode of 'InProc' to manage logged in user sessions within the Application Pool Worker Process that should live for the duration of the Session or App Pool):

1. Web.Config:
```
<sessionState 
 mode="InProc" 
 timeout="30" 
 regenerateExpiredSessionId="true" />
```
```

 <caching>
 <outputCache enableOutputCache="true" />
 <outputCacheSettings>
   <outputCacheProfiles>
 <add name="CacheForReport" location="Server" duration="60" varyByParam="ReportId" varyByHeader="Accept"/>
 </outputCacheProfiles>
 </outputCacheSettings>
 </caching>
```
2. MyWebService.cs:
```
[ServiceContract( SessionMode = SessionMode.Allowed )]
[AspNetCompatibilityRequirements( RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed )]
[ServiceBehavior( InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Multiple )]
public class TrackingWebService
{
```
```
    [OperationBehavior( Impersonation = ImpersonationOption.Allowed )]
    [AspNetCacheProfile("CacheForReport")]
    [WebGet( UriTemplate = "GetReport?ReportId={sReportId}" )]
 public MyReport GetReport( string sReportId )
    {
```
```
          // Perform Query, Create and Populate MyReport, Return MyReport 
```
```
          // (Content here isn't important as the URL Request should be 
```
```
          // intercepted by IIS and return a Cached Response on the second repeat call
```
```
          // as long as the ReportId parameter is the same) 
```
```
 const string sJsonData = "{\"Result\":\"OK\"}"
```
```
          MyReport rMyReport = JsonConvert.DeserializeObject< MyReport >( sJsonData );
```
```
          return rMyReport;
```
```
    }
```
```
}
```
3. MyReport
```
[DataContract]
public class MyReport
{
```
```
     [DataMember] public string Result;
```
```
} 
```
4. Testing

I used Firefox 16.0 to test the URL request and re-request it to test the cache (independent of jQuery or other frameworks). Firebug confirms the URL Parameters match, but Server side caching doesn't work.

Q: Do I have to do anything or should IIS simply cache the response for 60 seconds if the URL and URL Params have been used before?

It appears the 'duration' only controls writing the 'Expire' header entry within the HTTP Response when the mode includes the 'Client' or 'ServerAndClient'?

Q: Is the use of 'InProc' causing the Server Caching to be ignored? Do I have to use AppFabric to make this work or should IIS just handle this within the Worker Process that stays alive (with App Pool configured to rarely recycle unless Web Service changes)?

AppFabric seems to be going away and Microsoft seems to be encouraging people to move toward Azure and Cloud Servers. I see no reason the 'InProc' shouldn't work -- but wanted to see what others think about the internals of IIS.

Q: While I can use Client Caching, I'd rather try Server caching to have control over purging when the user logs out. Is this possible?

It seems I may have to define my own caching at the Server Side. It would be nice to have this automatically work.
- Edited by MysticW on Nov 07, 2012 02:08 AM
- Edited by MysticW on Nov 07, 2012 02:10 AM
- Edited by MysticW on Nov 07, 2012 02:12 AM
- Edited by MysticW on Nov 07, 2012 02:13 AM
- Edited by mbanavige on Nov 07, 2012 04:54 PM
- Edited by mbanavige on Nov 07, 2012 04:55 PM
- Split by mbanavige on Nov 07, 2012 04:56 PM
- Edited by MysticW on Nov 07, 2012 07:56 PM
- Edited by MysticW on Nov 07, 2012 07:57 PM
- Edited by MysticW on Nov 07, 2012 07:58 PM
- Reply
MysticW

Member

14 Points

7 Posts

Re: OutputCache(CacheProfile)

Nov 07, 2012 07:52 PM|LINK

Here is what I'm guessing is going on...

- The 'outputCacheProfiles' appears to only manage writing the 'Cache-Control' header that is written within the HTTP Responses.

- It appears I need to write my own Caching mechanism to save and lookup to determine whether to use the Cache Response Data or to create a new one.

Q: Do I have this right?

Q: Can I use the HttpContext.Cache object to persist the Cache only for the Session?
- Reply
oak_silver

Member

418 Points

64 Posts

Re: OutputCache(CacheProfile)

Nov 08, 2012 05:18 AM|LINK

What service are you using?

Optimizing Web Services Performance with Caches

http://docs.oracle.com/cd/E12890_01/ales/docs32/webservicesprogrammersguide/cache.html

Using the Web Services Client Authorization Cache

http://docs.oracle.com/cd/E13169_01/ales/docs22/webservicesprogrammersguide/cache.html

Please mark it as answer if it helps.
- Marked as answer by haixia xie - msft on Nov 13, 2012 08:57 AM