reactiveui / akavache

An asynchronous, persistent key-value store created for writing desktop and mobile applications, based on SQLite3. Akavache is great for both storing important data as well as cached local data that expires.

What is ReactiveUI?

ReactiveUI is a composable, cross-platform model-view-viewmodel framework for all .NET platforms that is inspired by functional reactive programming, which is a paradigm that allows you to abstract mutable state away from your user interfaces and express the idea around a feature in one readable place and improve the testability of your application.

🔨 Get Started 🛍 Install Packages 🎞 Watch Videos 🎓 View Samples 🎤 Discuss ReactiveUI

Book

There has been an excellent book written by our Alumni maintainer Kent Boogart.

NuGet Packages

Install the following packages to start building your own ReactiveUI app. Note: some of the platform-specific packages are required. This means your app won't perform as expected until you install the packages properly. See the Installation docs page for more info.

Platform	ReactiveUI Package	NuGet
.NET Standard	ReactiveUI
	ReactiveUI.Fody
Unit Testing	ReactiveUI.Testing
WPF	ReactiveUI.WPF
UWP	ReactiveUI.Uwp
WinUI	ReactiveUI.WinUI
MAUI	ReactiveUI.Maui
Windows Forms	ReactiveUI.WinForms
Xamarin.Forms	ReactiveUI.XamForms
Xamarin.Essentials	ReactiveUI
AndroidX (Xamarin)	ReactiveUI.AndroidX
Xamarin.Android	ReactiveUI.AndroidSupport
Xamarin.iOS	ReactiveUI
Xamarin.Mac	ReactiveUI
Tizen	ReactiveUI
Blazor	ReactiveUI.Blazor
Platform Uno	ReactiveUI.Uno
Platform Uno	ReactiveUI.Uno.WinUI
Avalonia	Avalonia.ReactiveUI
Any	ReactiveUI.Validation

Sponsorship

The core team members, ReactiveUI contributors and contributors in the ecosystem do this open-source work in their free time. If you use ReactiveUI, a serious task, and you'd like us to invest more time on it, please donate. This project increases your income/productivity too. It makes development and applications faster and it reduces the required bandwidth.

Become a sponsor.

This is how we use the donations:

• Allow the core team to work on ReactiveUI
• Thank contributors if they invested a large amount of time in contributing
• Support projects in the ecosystem

Support

If you have a question, please see if any discussions in our GitHub issues or Stack Overflow have already answered it.

If you want to discuss something or just need help, here is our Slack room, where there are always individuals looking to help out!

Please do not open GitHub issues for support requests.

Contribute

ReactiveUI is developed under an OSI-approved open source license, making it freely usable and distributable, even for commercial use.

If you want to submit pull requests please first open a GitHub issue to discuss. We are first time PR contributors friendly.

See Contribution Guidelines for further information how to contribute changes.

Core Team

Glenn Watson Melbourne, Australia	Rodney Littles II Texas, USA	Artyom Gorchakov Moscow, Russia
Colt Bauman South Korea	Chris Pulman United Kingdom

Alumni Core Team

The following have been core team members in the past.

Geoffrey Huntley Sydney, Australia	Kent Boogaart Brisbane, Australia	Olly Levett London, United Kingdom
Anaïs Betts San Francisco, USA	Brendan Forster Melbourne, Australia	Claire Novotny New York, USA

.NET Foundation

ReactiveUI is part of the .NET Foundation. Other projects that are associated with the foundation include the Microsoft .NET Compiler Platform ("Roslyn") as well as the Microsoft ASP.NET family of projects, Microsoft .NET Core & Xamarin Forms.

akavache's Issues

WP8 BackgroundAgent Invalid cross-thread access

Windows Phone 8 project
Akavache v3.2.0

Attempting to access the default LocalMachine BlobCache from a WP8 background agent throws UnauthorizedAccessException.
Looks like the exception is coming from ReactiveUI.RxApp when it is not run on a UI thread.

I have created a sample project to show the error. https://dl.dropboxusercontent.com/u/4165510/AkavacheWP8BackgroundTest.zip
Run this project and it will schedule the task and launch it for testing after a few seconds then throw the exception on the getter for BlobCache.LocalMachine

Stack Trace

{System.TypeInitializationException: The type initializer for 'Akavache.BlobCache' threw an exception. ---> System.TypeInitializationException: The type initializer for 'ReactiveUI.RxApp' threw an exception. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.UnauthorizedAccessException: Invalid cross-thread access.
   at MS.Internal.XcpImports.CheckThread()
   at System.Windows.DependencyObject..ctor(UInt32 nativeTypeIndex, IntPtr constructDO)
   at System.Windows.Controls.Border..ctor()
   --- End of inner exception stack trace ---
   at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& bNeedSecurityCheck)
   at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic)
   at System.Activator.CreateInstance(Type type)
   at ReactiveUI.DesignModeDetector.IsInDesignMode()
   at ReactiveUI.RxApp.InUnitTestRunner()
   at ReactiveUI.RxApp..cctor()
   --- End of inner exception stack trace ---
   at ReactiveUI.RxApp.get_suppressLogging()
   at ReactiveUI.LogHost.get_Default()
   at Akavache.BlobCache..cctor()
   --- End of inner exception stack trace ---}

[WinRT] GetOrFetchObject always returns null when using roaming/local storage

While the examples in the README work nicely, I wanted to use the more elegant APIs like this:

var result = await blobCache.GetOrFetchObject(
             "KeyOne",
             () => Observable.Return(new SomethingUseful { Id = 1 }));

Assert.AreEqual(1, existingValueNoExpiration.Id);

Where SomethingUseful is just a POCO:

class SomethingUseful { public int Id; }

Expected: when GetOrfFetchObject does not find the object in cache, it should call fetch function and return result of fetch.
Actual: never calls fetch, always returns null.

Failing unit tests: https://gist.github.com/4465472

Adding Akavache to a WinPhone 8 app gives "Cannot resolve dependency to assembly 'System.Runtime.InteropServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' because it has not been preloaded. When using the ReflectionOnly APIs, dep

I added Akavache 3.0.1 to my WinPhone app and get this error on the build of EVERY xaml file. I have no idea where to even start.

Adding Akavache to a WinPhone 8 app gives "Cannot resolve dependency to assembly 'System.Runtime.InteropServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event."

Cache Locations For Monotouch

The current implimention that uses IsolatedStorageFile saves all caches to the ~/Documents directory on Monotouch.

There are some undesired effects when using the ~/Documents directory. First off everything in this directory is made available to the user through iTunes. Secondly, anything in this directory is backed up to iCloud.

The proper directory for a cache is ~/Library/Caches/ on the iPhone. This directory isn't backed up and is meant for anything that can be easily recreated.

http://docs.xamarin.com/guides/ios/application_fundamentals/working_with_the_file_system#3.2.application-directories

At the very least the argument could be made that the UserAccount cache should be stored in ~/Library/ which is backed up and the LocalMachine should be stored in ~/Library/Caches/ since there is a higher probability that anything stored in the LocalMachine is data that can easily be recreated if necessary and probably doesn't related to user preferences that they might configure in the application.

If you are agreeable on this I can submit a PR.

API Sketches for Transactions

API Sketches for My Sweetheart the Drunk Transaction

• The mindblowing idea is, you simply cannot access normal read/write operations outside of a transaction. They're not even on the IBlobCache object. Instead, you create a transaction and the returned transaction object has all of the methods you're used to. You can't Hold It Wrong™.

Old:

await BlobCache.LocalMachine.InsertObject("Foo", bar);
await BlobCache.LocalMachine.GetObjectAsync<Baz>("Bamf");

Perhaps New:

// Return value must:
// * Return the value of the transaction at the end or be Unit
// * Have a Cancel() method to cancel the transaction
await BlobCache.LocalMachine.InTransaction(cache => async {
    await cache.InsertObject("Foo", Bar);
    return await cache.GetObjectAsync<Baz>("Bamf");
});

or perhaps just:

await BlobCache.LocalMachine.InSyncTransaction(cache => {
    // These all run in order
    cache.InsertObject("Foo", Bar);
    cache.InsertObject("Baz", Bamf);

    return cache.GetObject<Bard>("Shakespeare");
});

Maybe both? There should also be a method for one-offs:

// I hate the name "SingleOp", find something better
await BlobCache.LocalMachine.SingleOp().GetAllObjects<Bamf>();

or times when you can't jam everything into a single Lambda function:

var transaction = BlobCache.LocalMachine.BeginTransaction();

await transaction.GetObjectAsync<Bar>("Foo");

transaction.Dispose();   // Finishes the transaction
//or
transaction.Cancel();    // Aborts the transaction.

Open Questions

• Are operations inside a transaction guaranteed to run sequentially? Should they be?
• Do transactions only apply to writes, or does it guarantee a consistent read "view of the world".

Problem with Akavache and Punchlock in WinRT

I'm running into an issue when using Punchlock with Akavache.

I'm using the line

return await _opQueue.Enqueue(1, async () => await BlobCache.LocalMachine.LoadImageFromUrl(imageUrl));

to queue up image loading from an external resource. This works fine the first time it goes off to get the images. However, when it has already persisted the images, it never seems to return.

Thanks!

SqlitePersistentBlobCache#GetCreatedAt is full of lies

See the failing tests added with 8bea79d

Shouldn't IBlobCache.GetCreatedAt return Observable.Empty or a KeyNotFoundException?

When I call IBlobCache.GetCreatedAt with a key that doesn't exist, I get an observable sequence with one null value. That's counter intuitive. For example, when I call IBlobCache.GetAsync with a key that doesn't exist, I get an observed KeyNotFoundException.

For GetCreatedAt I would have expected one of these behaviors.

This brings up a general question about Rx operators. When you have an operator that returns a single result, when should you return Observable.Return(null) and when should you do Observable.Empty()? I'm finding that the lack of consistency with this leads me to have to write extra defensive boiler-plate code since I'm never sure what any given operator will do.

Thoughts?

Namespace collision with Sqlite-net component

The code from:
https://github.com/praeclarum/sqlite-net

is also available in a Xamarin Component and as a NuGet package. Using either of these causes namespace collisions with your sqlite version.

namespace SQLite

Can't add Akavache NuGet package to MonoTouch / Xamarin.iOS project

Hey there,

I just tried adding Akavache to an empty/new universal iOS project in VS (with Xamarin's toolchain installed) and unfortunately it failed because the Newtonsoft.Json package does not support MonoTouch projects.. apparently:

Attempting to resolve dependency 'akavache.portable (= 3.0.1)'. Attempting to resolve dependency 'Newtonsoft.Json (≥ 5.0.5)'. Attempting to resolve dependency 'reactiveui-core (≥ 5.0.1)'. Attempting to resolve dependency 'Rx-Main (≥ 2.1.30214.0)'. Attempting to resolve dependency 'Rx-Interfaces (≥ 2.1.30214.0)'. Attempting to resolve dependency 'Rx-Core (≥ 2.1.30214.0)'. Attempting to resolve dependency 'Rx-Linq (≥ 2.1.30214.0)'. Attempting to resolve dependency 'Rx-PlatformServices (≥ 2.1.30214.0)'. Installing 'Newtonsoft.Json 5.0.6'. Successfully installed 'Newtonsoft.Json 5.0.6'. Installing 'Rx-Interfaces 2.1.30214.0'. Successfully installed 'Rx-Interfaces 2.1.30214.0'. Installing 'Rx-Core 2.1.30214.0'. Successfully installed 'Rx-Core 2.1.30214.0'. Installing 'Rx-Linq 2.1.30214.0'. Successfully installed 'Rx-Linq 2.1.30214.0'. Installing 'Rx-PlatformServices 2.1.30214.0'. Successfully installed 'Rx-PlatformServices 2.1.30214.0'. Installing 'Rx-Main 2.1.30214.0'. Successfully installed 'Rx-Main 2.1.30214.0'. Installing 'reactiveui-core 5.0.2'. Successfully installed 'reactiveui-core 5.0.2'. Executing script file 'D:\Development\HelloWorld_App1\packages\reactiveui-core.5.0.2\tools\init.ps1'. Installing 'akavache.portable 3.0.1'. Successfully installed 'akavache.portable 3.0.1'. Installing 'akavache 3.0.1'. Successfully installed 'akavache 3.0.1'. Adding 'Newtonsoft.Json 5.0.6' to HelloWorld_App1. Uninstalling 'Newtonsoft.Json 5.0.6'. Successfully uninstalled 'Newtonsoft.Json 5.0.6'. Install failed. Rolling back... Could not install package 'Newtonsoft.Json 5.0.6'. You are trying to install this package into a project that targets 'MonoTouch,Version=v4.0', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.

As MonoTouch is mentioned/targeted in Akavache's nuspec file I was wondering.. what am I doing wrong / what version of Json.Net would be the correct one?

(also: the same goes for ReactiveUI).

Cheers
-Jörg

Potential race condition with Dispose

I wrote up a description of the race condition here: ce9c8a7

This is so difficult to get right. This gives me an idea though. This is a general pattern when multithreading is involved. Maybe we need a special Disposer class that encapsulates this pattern.

You create it and each method becomes wrapped by it.

public void SomeMethod() {
  disposer.Do(() => {/* actual implementation */});
}

public void Dispose() {
   disposer.Dispose(() => { /* actual implementation */});
}

Disposer makes sure that dispose waits on any outstanding operations before it disposes. It also make sure that no new operations can start while disposing. When disposing is done, all operations throw ObjectDisposedException. I think this would be broadly useful. What do you think? If you like it, I can sketch it out in the context of Akavache.

Sqlite implementation of GetCreatedAt returns expiration.

The Sqlite implementation of BlobCache looks to return the expiration time rather than the created at time.

Fixture tests sometime fail because cache hasn't finished writing to disk

Sometimes when I run the Akavache tests I see failures like this:

Test 'Akavache.Tests.PersistentBlobCacheInterfaceFixture.CacheShouldBeRoundtrippable' failed: System.IO.IOException : The process cannot access the file 'C:\Users\Adam Roben\Documents\GitHub\Windows\Akavache\Akavache.Tests\bin\Debug\f4d14bf2-deb3-45d4-9457-f376ab69d3ea\1356c67d7ad1638d816bfb822dd2c25d' because it is being used by another process.
    at System.Reactive.ExceptionHelpers.Throw[T](Exception exception)
    at System.Reactive.Linq.Observable.FirstOrDefaultInternal[TSource](IObservable`1 source, Boolean throwOnEmpty)
    at System.Reactive.Linq.Observable.First[TSource](IObservable`1 source)
    BlobCacheFixture.cs(65,0): at Akavache.Tests.BlobCacheInterfaceFixture.CacheShouldBeRoundtrippable()

Test 'Akavache.Tests.EncryptedBlobCacheInterfaceFixture.CacheShouldBeRoundtrippable' failed: System.IO.IOException : The process cannot access the file 'C:\Users\Adam Roben\Documents\GitHub\Windows\Akavache\Akavache.Tests\bin\Debug\f901b928-26f0-474a-8408-bb9311450866\1356c67d7ad1638d816bfb822dd2c25d' because it is being used by another process.
    at System.Reactive.ExceptionHelpers.Throw[T](Exception exception)
    at System.Reactive.Linq.Observable.FirstOrDefaultInternal[TSource](IObservable`1 source, Boolean throwOnEmpty)
    at System.Reactive.Linq.Observable.First[TSource](IObservable`1 source)
    BlobCacheFixture.cs(65,0): at Akavache.Tests.BlobCacheInterfaceFixture.CacheShouldBeRoundtrippable()

It looks like the cache gets flushed to disk asynchronously and that these tests aren't waiting for it to complete before trying to use the cache files again.

How do i debug a "Catastrophic failure" when using Akavache in a Windows Store App (8.1)?

i'm goofing around with a Windows Store App and when i include Akavache and try to InsertObject or GetObjectAsync, i get a COMException:

System.Runtime.InteropServices.COMException was unhandled by user code
  HResult=-2147418113
  Message=Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))
  Source=mscorlib
  ErrorCode=-2147418113
  StackTrace:
       at System.StubHelpers.StubHelpers.GetWinRTFactoryObject(IntPtr pCPCMD)
       at Windows.Storage.ApplicationData.get_Current()
       at Akavache.SimpleFilesystemProvider.GetDefaultLocalMachineCacheDirectory()
       at Akavache.Registrations.<>c__DisplayClass9.<Register>b__1()
       at System.Lazy`1.CreateValue()
    --- End of stack trace from previous location where exception was thrown ---
       at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
       at System.Lazy`1.get_Value()
       at Akavache.Registrations.<>c__DisplayClass9.<Register>b__2()
       at ReactiveUI.ModernDependencyResolver.GetService(Type serviceType, String contract)
       at ReactiveUI.DependencyResolverMixins.GetService[T](IDependencyResolver This, String contract)
       at Akavache.BlobCache.get_LocalMachine()
  InnerException: 

i'm on Windows 8.1 and making an 8.1 Store App.

i'm pretty sure that i'm just missing something because when i made a new app and included Akavache, it worked fine. Any ideas on what i could be doing wrong here? Because i think it's probably my fault, i would welcome advice on how i can debug this exception as well 😄.

i haven't included the NuGet to use SQLite3, although i plan to include it once i get my 💩 together.

SqlitePersistentBlobCache#GetObjectAsync doesn't prefix keys when noTypePrefix is false

See https://github.com/github/Akavache/blob/master/Akavache.Sqlite3/SqlitePersistentBlobCache.cs#L162. Is this intentional?

Problems installing via nuget

I can't get akavache to install in my Windows Phone 8.1 (WinRT) project:

> install-package akavache
> ... successful dependencies...
> Uninstalling 'Splat 1.0.0'.
> Successfully uninstalled 'Splat 1.0.0'.
> Install failed. Rolling back...
> install-package : Could not install package 'Splat 1.0.0'. You are trying to install this package into a project that targets 'WindowsPhoneApp,Version=v8.1', but 
> the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.

Trying again with the -pre flag does appear to work, and I see a reference to 3.99.1-beta in my packages.config, but no dependencies are installed, nothing seems to be referenced, and there appears to be no assembly with the Akavache namespace in the project, BlobCache doesn't exist, etc.

Error: Could not open database file

i am opening/creating the DB on android like so

  Store = new SqlitePersistentBlobCache("Doggity");

and get the stacktrace below.

With standard sqlite there is an OpenOrCreate method - do i need some equivalent here?

System.TypeInitializationException: An exception was thrown by the type initializer for Doggity.Android.AndroidConfig
04-02 22:52:18.924 E/mono    (23754): 
04-02 22:52:18.924 E/mono    (23754): Unhandled Exception:
04-02 22:52:18.924 E/mono    (23754): System.TypeInitializationException: An exception was thrown by the type initializer for Doggity.Android.AndroidConfig ---> SQLite.SQLiteException: Could not open database file: Doggity (CannotOpen)
04-02 22:52:18.924 E/mono    (23754):   at SQLite.SQLiteConnection..ctor (System.String databasePath, SQLiteOpenFlags openFlags, Boolean storeDateTimeAsTicks) [0x0006d] in /Users/paul/github/Akavache/Akavache.Sqlite3/SQLite.cs:125 
04-02 22:52:18.924 E/mono    (23754):   at SQLite.SQLiteConnectionWithoutLock..ctor (SQLite.SQLiteConnectionString connectionString, SQLiteOpenFlags flags) [0x00000] in /Users/paul/github/Akavache/Akavache.Sqlite3/SQLiteAsync.cs:344 
04-02 22:52:18.924 E/mono    (23754):   at SQLite.SQLiteConnectionPool+Entry..ctor (SQLite.SQLiteConnectionString connectionString, SQLiteOpenFlags flags) [0x0000d] in /Users/paul/github/Akavache/Akavache.Sqlite3/SQLiteAsync.cs:330 
04-02 22:52:18.924 E/mono    (23754):   at SQLite.SQLiteConnectionPool+<Reset>c__AnonStorey14.<>m__25 (Int32 _) [0x00000] in /Users/paul/github/Akavache/Akavache.Sqlite3/SQLiteAsync.cs:309 
04-02 22:52:18.924 E/mono    (23754):   at System.Linq.Enumerable+<CreateSelectIterator>c__Iterator10`2[
04-02 22:52:18.927 E/mono-rt (23754): [ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: An exception was thrown by the type initializer for Doggity.Android.AndroidConfig ---> SQLite.SQLiteException: Could not open database file: Doggity (CannotOpen)
04-02 22:52:18.927 E/mono-rt (23754):   at SQLite.SQLiteConnection..ctor (System.String databasePath, SQLiteOpenFlags openFlags, Boolean storeDateTimeAsTicks) [0x0006d] in /Users/paul/github/Akavache/Akavache.Sqlite3/SQLite.cs:125 
04-02 22:52:18.927 E/mono-rt (23754):   at SQLite.SQLiteConnectionWithoutLock..ctor (SQLite.SQLiteConnectionString connectionString, SQLiteOpenFlags flags) [0x00000] in /Users/paul/github/Akavache/Akavache.Sqlite3/SQLiteAsync.cs:344 
04-02 22:52:18.927 E/mono-rt (23754):   at SQLite.SQLiteConnectionPool+Entry..ctor (SQLite.SQLiteConnectionString connectionString, SQLiteOpenFlags flags) [0x0000d] in /Users/paul/github/Akavache/Akavache.Sqlite3/SQLiteAsync.cs:330 
04-02 22:52:18.927 E/mono-rt (23754):   at SQLite.SQLiteConnectionPool+<Reset>c__AnonStorey14.<>m__25 (Int32 _) [0x00000] in /Users/paul/github/Akavache/Akavache.Sqlite3/SQLiteAsync.cs:309 
04-02 22:52:18.927 E/mono-rt (23754):   at System.Linq.Enumerable+<CreateSelectIterator>c__

How to subscribe to "CacheIndex inited" event?

While PersistentBlobCache is initializing CacheIndex is set to default empty object. How can i deterministically wait/await until it is properly inited?

Akavache.Sqlite3 on Monotouch and b0rked serializations

Hey!

Disclaimer: I didn't dig too deep on this bug, I'm trying to get feedback before spending too much time on this.

I'm trying Akavache.Sqlite3 again and I've noticed that somehow my app entered on a state where it would start and just stay on the blank black screen. After digging somewhat I found out that I had a bug on one of my view models that led to the deserialization step to fail. Now, instead of throwing an exception, it seems that Akavache.Sqlite3 was returning null, thus the AutoSuspendDelegate would just pass the null along and nothing would work.

Like I've said above, I'm not completely sure this is an Akavache.Sqlite3 bug, it may be something on my end. Does it ring any bells?

Cheers! :)

Sqlite3 for WP8

Why isn't there support for Akavache.Sqlite3_WP8? There is a working hint in your repo describing how to integrate Sqlite into WP8 but why it is not used and we are forced to use Akavache.Deprecated instead?
Thanks

WP8 Isolated Storage data not Encrypted in EncryptedBlobCache

The ProtectedData shim is still in place for the WP8 solution. This stops the isolated storage provider from encrypting data.

Fix shown here PeteGoo@bc14b80

SQLite.SQLiteException

Message: "Locked"
Stacktrace:

   at SQLite.PreparedSqlLiteInsertCommand.ExecuteNonQuery(Object[] source) in z:\github\Akavache\Akavache.Sqlite3\SQLite.cs:line 1847
   at SQLite.SQLiteConnection.Insert(Object obj, String extra, Type objType) in z:\github\Akavache\Akavache.Sqlite3\SQLite.cs:line 949
   at SQLite.SQLiteAsyncConnection.<>c__DisplayClass8.<InsertAsync>b__7(SQLiteConnection conn) in z:\github\Akavache\Akavache.Sqlite3\SQLiteAsync.cs:line 138
   at SQLite.SQLiteConnectionPool.<>c__DisplayClass1`1.<EnqueueConnectionOp>b__0() in z:\github\Akavache\Akavache.Sqlite3\SQLiteAsync.cs:line 278
   at Akavache.KeyedOperationQueue.<>c__DisplayClass15`1.<SafeStart>b__14() in z:\github\Akavache\Akavache\Portable\KeyedOperationQueue.cs:line 146

Version I'm using: 3.2.0
I get this exception when doing some inserts into the BlobCache.
I haven't yet had the time to create a simple reproduction, but I'll try to come up with one soon.

Akavache does not work on Xamarin.iOS 7.0.[23] on the device

Running on the simulator is fine, but on the device the following happens even with the linker off.

On InitializeAkavache:41, registerTypeClass always is null when running on a device (iPhone 4). This looks like a Xamarin bug, but I'm not sure.

Worse still, since IWantsToRegister is internal, I can't manually call them either.

WinRT - missing dependencies at runtime

Running this snippet from a C# Windows Store app

// must do this first or else no soup for you
BlobCache.ApplicationName = "FlickBoard";
var store = BlobCache.UserAccount;

Gives me this sweet error:

Could not load file or assembly 'System.Reactive.WindowsRuntime, Version=2.0.20823.0, Culture=neutral, PublicKeyToken=f300afd708cefcd3' or one of its dependencies. The system cannot find the file specified.

Which isn't present when I install Akavache 2.3.0 from NuGet:

Reading the source I see these two project references:

<Reference Include="System.Reactive.Windows.Threading">
    <HintPath>..\packages\Rx-WindowStoreApps.2.0.21114\lib\WinRT45\System.Reactive.Windows.Threading.dll</HintPath>
</Reference>
<Reference Include="System.Reactive.WindowsRuntime">
    <HintPath>..\packages\Rx-WinRT.2.0.21114\lib\WinRT45\System.Reactive.WindowsRuntime.dll</HintPath>
</Reference>

And I realise the error of my ways! So I go back to NuGet and run

Install-Package Rx-WindowStoreApps

And then it works. And then I grumble about why this assembly doesn't ship with the PlatformServices NuGet package...

Using GetOrFetchObject never seems to invalidate objects

Using thee GetOrFetchObject for operations that write to disk, it never seem to invalidate using the absolute expiration.

Could not AOT the assembly Akavache.Sqlite3.dll

It looks like some of the changes in the Sqlite3 library broken Ahead Of Time compiling in Monotouch. Still trying to figure out what it was. Slowly rolling back through the checkins until I find what caused the issue.

Error MT3001: Could not AOT the assembly '/Users/nick/Development/projects/app/src/Monotouch/Project/obj/iPhone/Debug/mtouch-cache/Build/Akavache.Sqlite3.dll' (MT3001) (Project)

This checkin 2b4660f appears to be safe.

fb9ae3b - 33c0870 causes the mono compiler to crash. So without getting these to compile makes it rather hard to see if the AOT error started with them.

15195ca - this appears to be when the AOT issue started. But as I mentioned before, without being able to compile the sources above in the mono compiler I can't say this is the place for certain.

Fx Version in Cache Key

I checked out the cache key created by LoginMixin.

"System.Tuple`2[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, 
PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=4.0.0.0, 
Culture=neutral,PublicKeyToken=b77a5c561934e089]]

What happens when we upgrade to .NET 4.5? Or eventually 5.0? Will our caches all be invalid all of a sudden?

Using Akavache with C# WPF - Help

I am trying to use Akavache in our C# wpf application. I am trying to initialize it in our AppBootstrapper, but not having much success.

        BlobCache.ApplicationName = "MobileApp";
        BlobCache.EnsureInitialized();
       dependencyResolver.RegisterLazySingleton(() => new TestBlobCache(), typeof(IBlobCache), "LocalMachine");
        dependencyResolver.RegisterLazySingleton(() => new TestBlobCache(), typeof(IBlobCache), "UserAccount");
        //dependencyResolver.Register(() => BlobCache.LocalMachine, typeof(IViewFor<IBlobCache>), "LocalMachine");
        //dependencyResolver.Register(() => BlobCache.UserAccount, typeof(IViewFor<IBlobCache>), "UserAccount");

But when I go to use BlobCache later on, both .LocalMachine and .UserAccount are null.

What am I missing?

DateTime handling serializes in UTC but Deserializes in Local.

https://gist.github.com/niik/09047dd5bf035359be57 has the gory details. Basically, we save DateTimes as UTC, but restore them as Local times. That's Bad™.

IO Error accessing file in cache

Hey,

I keep getting IOErrors from Akavache where it says the file is being accessed by another process. I am wondering if it is a threading issue with my code, is this something you have seen before? Should Akavache be dealing with these exceptions and retrying if it happens? On a separate note, with the new version you seem to have changed from SecretCache to BlobCache if the storage is in roaming. The pr suggests that you can override this to put it back to SecretCache but I have been unable to find how, is it possible?

Thanks in advance

Adam

Cant install nuget package

I receive this error

Could not install package 'Splat 1.0.0'. You are trying to install this package into a project that targets 'portable-net45+sl50+MonoAndroid10+MonoTouch10', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.

My PCL targets ios, android and .net 4.5

I have tried installing all the varieties of akavache and they all fail with this error.

GetAndFetchLatest never calls the `fetchPredicate`

I'm trying to understand what the purpose of the fetchPredicate argument to GetAndFetchLatest is but it seems to never be called. Here is a unit test that demonstrates the ill behavior.

[Fact]
public void Test()
{
    var cache = new TestBlobCache();
    cache.InsertObject("key", "value");
    var retrieved = new List<string>();
    var prefixes = new List<DateTimeOffset>();
    cache.GetAndFetchLatest<string>("key"
    , () => {throw new InvalidOperationException();}
    , dt =>
    {
        prefixes.Add(dt);
        return false;
    }
    , DateTimeOffset.Now.AddHours(1)).Subscribe(retrieved.Add);
    cache.GetAndFetchLatest<string>("key" 
    , () => { throw new InvalidOperationException();}
    , dt =>
    {
        prefixes.Add(dt);
        return false;
    }
    , DateTimeOffset.Now.AddHours(1)).Subscribe(retrieved.Add);
    Assert.Equal(2, prefixes.Count); // This is always 0. :(
}

LoadImage throws weird error if you pass null as URL

We should throw a better one

Akavache.Sqlite3 3.1.1 does not pass peverify

Here are the results of running peverify on the released binaries:

***** Mono/Akavache.Sqlite3.dll
Could not load class with token 2000002
* Assertion at class.c:5594, condition `!mono_loader_get_last_error ()' not met

Abort trap: 6

***** Monoandroid/Akavache.Sqlite3.dll
Missing method .ctor in assembly /Users/loyful/Downloads/Akavache.3.1.1 (1)/Monoandroid/Akavache.Sqlite3.dll, type System.Runtime.CompilerServices.AsyncStateMachineAttribute
Error: Invalid CustomAttribute content row 268 Value field 0x00000f4a
Error: CustomAttribute: Invalid constructor
Error count: 2

***** Monotouch/Akavache.Sqlite3.dll
Missing method .ctor in assembly /Users/loyful/Downloads/Akavache.3.1.1 (1)/Monotouch/Akavache.Sqlite3.dll, type System.Runtime.CompilerServices.AsyncStateMachineAttribute
Error: Invalid CustomAttribute content row 268 Value field 0x00000f4a
Error: CustomAttribute: Invalid constructor
Error count: 2

***** Net45/Akavache.Sqlite3.dll
Could not load class with token 2000002
* Assertion at class.c:5594, condition `!mono_loader_get_last_error ()' not met

Abort trap: 6

***** WinRT45/Akavache.Sqlite3.dll
Error: AssemblyRef table row 16 has invalid Flags 00000200
Error count: 1

AFAIU, those with Abort trap: 6 are actually passing peverify since even Xamarin.Mobile.dll triggers this behavior. Monoandroid and Monotouch, however, seem to have some genuine errors.

On a private Xamarin bug, Zoltan Varga stated that there were some bugs on mcs that caused some miscompilations, but that those bugs have since been fixed.

What Xamarin.iOS version was used to compile these binaries? (Version 7.0.2, current stable, creates binaries with the same problems.)

If you use your current setup, do your final binaries still not pass peverify? If so, then I guess it's time to fill a public mcs bug report.

Error activating IFilesystemProvider?

Is it a true issue or you just missed to put this on the readme doc?
I've already overcame this but, is it realy necessary to bind the SimpleFilesystemProvider to the
IFilesystemProvider?

Issue with .LocalMachine / .UserAccount...

see #85 (comment)

---

I put

BlobCache.ApplicationName = "MobileApp";

in the constructor of my class but when i go to reference BlobCache.LocalMachine or BlobCache.UserAccount, both are null objects.

Transactions + Cloud Sync

Akavache 3.0's Next Level Feature: Sync

Right now, syncing between a cloud-based data store and a local-based store is Hard™. One of the features I've been thinking about for some time now is adding Akavache backends that represent non-disk stores, such as GDrive or Dropbox Sync.

Right now, dealing with trying to cache data locally, then eventually push it up to The Cloud™ from a desktop or mobile application doesn't have any great solutions. Dropbox Sync attempts to solve some of these problems, but it's pretty thoroughly tied to Dropbox (of course). It also thinks at the level of files, which isn't necessarily very convenient for app developers.

So, basically, Akavache should have a backend that is a "multi-level" backend - a sync cache that itself has an IBlobCache, which represents the local cache for the data. It handles sending data back and forth to The Cloud (perhaps via an IRemoteBlobCache interface), and handles syncing between the two.

API Changes: Transactions

To do this though, Akavache needs to be savvy about transactions. Being able to create a transaction, change several key/value pairs, and either commit them or roll them back atomically is a key part to being able to pull off the cloud sync. Something like:

using (var transaction = cache.BeginTransaction()) {
    cache.InsertObject("foo", bar, transaction);
    cache.InsertObject("baz", bamf, transaction);
};

Add Splat NuGet dependency

I tried calling the DownloadUrl extension method to IBlobCache but it returns a Splat.IBitmap. What is even a splat?

I think you just need to add a package dependency to Splat.

Problem deserializing dynamic objects

I'm getting an exception in my app when I try to access members of dynamic objects coming out of GetOrFetchObject, when the result is cached. I've created a slimmed down sample similar to my actual project, which demonstrates the problem.

These are the steps to reproduce:

1. In VS 2013 Express for Windows, create a new project based on the Blank App (Windows Phone Silverlight) template, and target Windows Phone 8.0
2. In the Package Manager Console, install-package akavache
3. Open MainPage.xaml.cs and paste in this gist: https://gist.github.com/factormystic/3d44bf95ecb0af6684a7 don't forget to change my namespace to whatever your actual namespace is
4. Add a button to the page, and hook up the event handler to the one that I have there, that calls RunTest() (or add your own handler and manually call RunTest(), etc)
5. Start the app for debugging in an emulator, and click the button you added.
6. Note in the output window, the all the debug printing from my little debug delegate comes out fine, and there are no exceptions (but possibly some additional TaskHost symbol loading messages)
7. Click the button again. Note that this time, the exception handler message this shouldn't have happened, but did is printed

This corresponds with calling the debug print delegate on the cached result of the "ExampleDynamic" key, which is the object with the List<dynamic> in it.

This behavior is unexpected. The behavior that I want is the same behavior as when the button is first clicked, and there is no exception with the expected output.

Kinda irritating when dealing with dynamic objects from web requests, etc. What do you think?

NullReferenceException in Akavache

While calling the LoadImageFromUrl method I got the following stack trace with a NullReferenceException. As far as I know, we're not doing anything special here such as fiddling with the _inflightCache.

System.dll!System.Collections.Generic.LinkedList<string>.InternalInsertNodeBefore(System.Collections.Generic.LinkedListNode<string> node, System.Collections.Generic.LinkedListNode<string> newNode) + 0x23 bytes   
    System.dll!System.Collections.Generic.LinkedList<string>.AddFirst(System.Collections.Generic.LinkedListNode<string> node) + 0x23 bytes  
    ReactiveUI.dll!ReactiveUI.MemoizingMRUCache<string,System.IObservable<Akavache.Sqlite3.CacheElement>>.Get(string key, object context) + 0x1d6 bytes 
    ReactiveUI.dll!ReactiveUI.MemoizingMRUCache<string,System.IObservable<Akavache.Sqlite3.CacheElement>>.Get(string key) + 0x2d bytes  
    Akavache.Sqlite3.dll!Akavache.Sqlite3.SqlitePersistentBlobCache.GetAsync(string key) Line 88 + 0x13 bytes   C#
    Akavache.dll!Akavache.HttpMixin.DownloadUrl(Akavache.IBlobCache This, string url, System.Collections.Generic.Dictionary<string,string> headers, bool fetchAlways, System.DateTimeOffset? absoluteExpiration) Line 329 + 0x1a bytes  C#
    Akavache.dll!Akavache.BitmapImageMixin.LoadImageFromUrl(Akavache.IBlobCache This, string url, bool fetchAlways, System.DateTimeOffset? absoluteExpiration) Line 49 + 0x2d bytes C#

Could not open database file: BlobCache/userblobs.db (CannotOpen)

When debugging on device.

Now using
BlobCache.ApplicationName = "Doggity";
BlobCache.EnsureInitialized();
BlobCache.UserAccount.GetObjectAsync<Venue[]>("Venues");

which returns an error on the GetObjectAsync line. Do i need to grant extra permissions? External storage is already granted.

BlobCache.ApplicationName = "Doggity";
BlobCache.EnsureInitialized();

04-03 11:29:19.907 E/SQLiteLog(32234): (14) cannot open file at line 30191 of [00bb9c9ce4]
04-03 11:29:19.907 E/SQLiteLog(32234): (14) os_unix.c:30191: (2) open(//BlobCache/userblobs.db)

3.0.2 Akavache.BlobCache constructor throws Exception

When trying to use BlobCache.ApplicationName = "blah" as per the readme an exception is thrown from the static constructor as the TaskPoolScheduler is being used and it has been replaced with Scheduler.Default in the latest RXExtensions

Error Creating a PersistentBlobCache on WP

When attempting to create an instance of a PersistentBlobCache an IO Access error gets thrown. Seems like its being caused by the static properties that are Lazy loaded - https://github.com/github/Akavache/blob/master/Akavache/PersistentBlobCache.cs#L87

Environment:
Windows 8
Windows Phone 7.1.1 tools
Akavache NuGet package (v1.0.1)
Same result on both Device and Emulator

My code: https://gist.github.com/2656520
The stack trace: http://pastebin.com/dsBtSJzS

Unable to resolve dependency 'ReactiveUI-Core (≥ 5.2.0)'

I have a PCL library project (PCL 4.5 - Profile 7) and I tried to add the Akavache NuGet Package 3.20. I am getting the error "Unable to resolve dependency 'ReactiveUI-Core (≥ 5.2.0)'". I am using the newly released Xamarin Studio on the Mac (version 5 build 878) with its integrated NuGet Package manager. I also tried other PCL 4.5 profiles (49, 78, 111, and 259) without any success.

Below is the output of the Package Console:

Adding akavache...
Attempting to resolve dependency 'Splat (≥ 1.0.0)'.
Attempting to resolve dependency 'Newtonsoft.Json (≥ 5.0.5)'.
Attempting to resolve dependency 'ReactiveUI-Core (≥ 5.2.0)'.
Attempting to resolve dependency 'Rx-Main (≥ 2.1.30214.0)'.
Attempting to resolve dependency 'Rx-Interfaces (≥ 2.1.30214.0)'.
Attempting to resolve dependency 'Rx-Core (≥ 2.1.30214.0)'.
Attempting to resolve dependency 'Rx-Linq (≥ 2.1.30214.0)'.
Attempting to resolve dependency 'Rx-PlatformServices (≥ 2.1.30214.0)'.
akavache Package contains PowerShell scripts which will not be run.
The Rx-Interfaces package has a license agreement which is available at http://go.microsoft.com/fwlink/?LinkID=261272
Please review this license agreement and remove the package if you do not accept the agreement.
Check the package for additional dependencies which may also have license agreements.
Using this package and any dependencies constitutes your acceptance of these license agreements.
The Rx-Core package has a license agreement which is available at http://go.microsoft.com/fwlink/?LinkID=261272
Please review this license agreement and remove the package if you do not accept the agreement.
Check the package for additional dependencies which may also have license agreements.
Using this package and any dependencies constitutes your acceptance of these license agreements.
The Rx-Linq package has a license agreement which is available at http://go.microsoft.com/fwlink/?LinkID=261272
Please review this license agreement and remove the package if you do not accept the agreement.
Check the package for additional dependencies which may also have license agreements.
Using this package and any dependencies constitutes your acceptance of these license agreements.
The Rx-PlatformServices package has a license agreement which is available at http://go.microsoft.com/fwlink/?LinkID=261272
Please review this license agreement and remove the package if you do not accept the agreement.
Check the package for additional dependencies which may also have license agreements.
Using this package and any dependencies constitutes your acceptance of these license agreements.
The Rx-Main package has a license agreement which is available at http://go.microsoft.com/fwlink/?LinkID=261272
Please review this license agreement and remove the package if you do not accept the agreement.
Check the package for additional dependencies which may also have license agreements.
Using this package and any dependencies constitutes your acceptance of these license agreements.
Installing 'Splat 1.0.0'.
Added file 'Splat.dll' to folder 'Splat.1.0.0/lib/monoandroid'.
Added file 'Splat.dll.mdb' to folder 'Splat.1.0.0/lib/monoandroid'.
Added file 'Splat.dll' to folder 'Splat.1.0.0/lib/MonoMac'.
Added file 'Splat.dll.mdb' to folder 'Splat.1.0.0/lib/MonoMac'.
Added file 'Splat.dll' to folder 'Splat.1.0.0/lib/monotouch'.
Added file 'Splat.dll.mdb' to folder 'Splat.1.0.0/lib/monotouch'.
Added file 'Splat.dll' to folder 'Splat.1.0.0/lib/Net45'.
Added file 'Splat.pdb' to folder 'Splat.1.0.0/lib/Net45'.
Added file 'Splat.dll' to folder 'Splat.1.0.0/lib/NetCore45'.
Added file 'Splat.pdb' to folder 'Splat.1.0.0/lib/NetCore45'.
Added file 'Splat.pri' to folder 'Splat.1.0.0/lib/NetCore45'.
Added file 'Splat.dll' to folder 'Splat.1.0.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'Splat.dll.mdb' to folder 'Splat.1.0.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'Splat.pdb' to folder 'Splat.1.0.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'Splat.dll' to folder 'Splat.1.0.0/lib/wp8'.
Added file 'Splat.pdb' to folder 'Splat.1.0.0/lib/wp8'.
Added file 'Splat.1.0.0.nupkg' to folder 'Splat.1.0.0'.
Successfully installed 'Splat 1.0.0'.
Installing 'Newtonsoft.Json 5.0.5'.
Added file 'Newtonsoft.Json.dll' to folder 'Newtonsoft.Json.5.0.5/lib/net20'.
Added file 'Newtonsoft.Json.xml' to folder 'Newtonsoft.Json.5.0.5/lib/net20'.
Added file 'Newtonsoft.Json.dll' to folder 'Newtonsoft.Json.5.0.5/lib/net35'.
Added file 'Newtonsoft.Json.xml' to folder 'Newtonsoft.Json.5.0.5/lib/net35'.
Added file 'Newtonsoft.Json.dll' to folder 'Newtonsoft.Json.5.0.5/lib/net40'.
Added file 'Newtonsoft.Json.xml' to folder 'Newtonsoft.Json.5.0.5/lib/net40'.
Added file 'Newtonsoft.Json.dll' to folder 'Newtonsoft.Json.5.0.5/lib/net45'.
Added file 'Newtonsoft.Json.xml' to folder 'Newtonsoft.Json.5.0.5/lib/net45'.
Added file 'Newtonsoft.Json.dll' to folder 'Newtonsoft.Json.5.0.5/lib/netcore45'.
Added file 'Newtonsoft.Json.xml' to folder 'Newtonsoft.Json.5.0.5/lib/netcore45'.
Added file 'Newtonsoft.Json.dll' to folder 'Newtonsoft.Json.5.0.5/lib/portable-net40+sl4+wp7+win8'.
Added file 'Newtonsoft.Json.xml' to folder 'Newtonsoft.Json.5.0.5/lib/portable-net40+sl4+wp7+win8'.
Added file 'Newtonsoft.Json.dll' to folder 'Newtonsoft.Json.5.0.5/lib/portable-net45+wp80+win8'.
Added file 'Newtonsoft.Json.xml' to folder 'Newtonsoft.Json.5.0.5/lib/portable-net45+wp80+win8'.
Added file 'Newtonsoft.Json.5.0.5.nupkg' to folder 'Newtonsoft.Json.5.0.5'.
Successfully installed 'Newtonsoft.Json 5.0.5'.
Installing 'Rx-Interfaces 2.1.30214.0'.
Added file 'System.Reactive.Interfaces.dll' to folder 'Rx-Interfaces.2.1.30214.0/lib/Net40'.
Added file 'System.Reactive.Interfaces.XML' to folder 'Rx-Interfaces.2.1.30214.0/lib/Net40'.
Added file 'System.Reactive.Interfaces.dll' to folder 'Rx-Interfaces.2.1.30214.0/lib/Net45'.
Added file 'System.Reactive.Interfaces.XML' to folder 'Rx-Interfaces.2.1.30214.0/lib/Net45'.
Added file 'System.Reactive.Interfaces.dll' to folder 'Rx-Interfaces.2.1.30214.0/lib/NetCore45'.
Added file 'System.Reactive.Interfaces.XML' to folder 'Rx-Interfaces.2.1.30214.0/lib/NetCore45'.
Added file 'System.Reactive.Interfaces.dll' to folder 'Rx-Interfaces.2.1.30214.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'System.Reactive.Interfaces.XML' to folder 'Rx-Interfaces.2.1.30214.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'System.Reactive.Interfaces.dll' to folder 'Rx-Interfaces.2.1.30214.0/lib/SL4-WindowsPhone71'.
Added file 'System.Reactive.Interfaces.XML' to folder 'Rx-Interfaces.2.1.30214.0/lib/SL4-WindowsPhone71'.
Added file 'System.Reactive.Interfaces.dll' to folder 'Rx-Interfaces.2.1.30214.0/lib/SL5'.
Added file 'System.Reactive.Interfaces.XML' to folder 'Rx-Interfaces.2.1.30214.0/lib/SL5'.
Added file 'System.Reactive.Interfaces.dll' to folder 'Rx-Interfaces.2.1.30214.0/lib/WP8'.
Added file 'System.Reactive.Interfaces.XML' to folder 'Rx-Interfaces.2.1.30214.0/lib/WP8'.
Added file '_._' to folder 'Rx-Interfaces.2.1.30214.0/lib/SL4'.
Added file 'Rx-Interfaces.2.1.30214.0.nupkg' to folder 'Rx-Interfaces.2.1.30214.0'.
Successfully installed 'Rx-Interfaces 2.1.30214.0'.
Installing 'Rx-Core 2.1.30214.0'.
Added file 'System.Reactive.Core.dll' to folder 'Rx-Core.2.1.30214.0/lib/Net40'.
Added file 'System.Reactive.Core.XML' to folder 'Rx-Core.2.1.30214.0/lib/Net40'.
Added file 'System.Reactive.Core.dll' to folder 'Rx-Core.2.1.30214.0/lib/Net45'.
Added file 'System.Reactive.Core.XML' to folder 'Rx-Core.2.1.30214.0/lib/Net45'.
Added file 'System.Reactive.Core.dll' to folder 'Rx-Core.2.1.30214.0/lib/NetCore45'.
Added file 'System.Reactive.Core.XML' to folder 'Rx-Core.2.1.30214.0/lib/NetCore45'.
Added file 'System.Reactive.Core.dll' to folder 'Rx-Core.2.1.30214.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'System.Reactive.Core.XML' to folder 'Rx-Core.2.1.30214.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'System.Reactive.Core.dll' to folder 'Rx-Core.2.1.30214.0/lib/SL4-WindowsPhone71'.
Added file 'System.Reactive.Core.XML' to folder 'Rx-Core.2.1.30214.0/lib/SL4-WindowsPhone71'.
Added file 'System.Reactive.Core.dll' to folder 'Rx-Core.2.1.30214.0/lib/SL5'.
Added file 'System.Reactive.Core.XML' to folder 'Rx-Core.2.1.30214.0/lib/SL5'.
Added file 'System.Reactive.Core.dll' to folder 'Rx-Core.2.1.30214.0/lib/WP8'.
Added file 'System.Reactive.Core.XML' to folder 'Rx-Core.2.1.30214.0/lib/WP8'.
Added file '_._' to folder 'Rx-Core.2.1.30214.0/lib/SL4'.
Added file 'Rx-Core.2.1.30214.0.nupkg' to folder 'Rx-Core.2.1.30214.0'.
Successfully installed 'Rx-Core 2.1.30214.0'.
Installing 'Rx-Linq 2.1.30214.0'.
Added file 'System.Reactive.Linq.dll' to folder 'Rx-Linq.2.1.30214.0/lib/Net40'.
Added file 'System.Reactive.Linq.XML' to folder 'Rx-Linq.2.1.30214.0/lib/Net40'.
Added file 'System.Reactive.Linq.dll' to folder 'Rx-Linq.2.1.30214.0/lib/Net45'.
Added file 'System.Reactive.Linq.XML' to folder 'Rx-Linq.2.1.30214.0/lib/Net45'.
Added file 'System.Reactive.Linq.dll' to folder 'Rx-Linq.2.1.30214.0/lib/NetCore45'.
Added file 'System.Reactive.Linq.XML' to folder 'Rx-Linq.2.1.30214.0/lib/NetCore45'.
Added file 'System.Reactive.Linq.dll' to folder 'Rx-Linq.2.1.30214.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'System.Reactive.Linq.XML' to folder 'Rx-Linq.2.1.30214.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'System.Reactive.Linq.dll' to folder 'Rx-Linq.2.1.30214.0/lib/SL4-WindowsPhone71'.
Added file 'System.Reactive.Linq.XML' to folder 'Rx-Linq.2.1.30214.0/lib/SL4-WindowsPhone71'.
Added file 'System.Reactive.Linq.dll' to folder 'Rx-Linq.2.1.30214.0/lib/SL5'.
Added file 'System.Reactive.Linq.XML' to folder 'Rx-Linq.2.1.30214.0/lib/SL5'.
Added file 'System.Reactive.Linq.dll' to folder 'Rx-Linq.2.1.30214.0/lib/WP8'.
Added file 'System.Reactive.Linq.XML' to folder 'Rx-Linq.2.1.30214.0/lib/WP8'.
Added file '_._' to folder 'Rx-Linq.2.1.30214.0/lib/SL4'.
Added file 'Rx-Linq.2.1.30214.0.nupkg' to folder 'Rx-Linq.2.1.30214.0'.
Successfully installed 'Rx-Linq 2.1.30214.0'.
Installing 'Rx-PlatformServices 2.1.30214.0'.
Added file 'Readme.txt' to folder 'Rx-PlatformServices.2.1.30214.0/content/Portable-Net45+WinRT45+WP8'.
Added file 'System.Reactive.PlatformServices.dll' to folder 'Rx-PlatformServices.2.1.30214.0/lib/Net40'.
Added file 'System.Reactive.PlatformServices.XML' to folder 'Rx-PlatformServices.2.1.30214.0/lib/Net40'.
Added file 'System.Reactive.PlatformServices.dll' to folder 'Rx-PlatformServices.2.1.30214.0/lib/Net45'.
Added file 'System.Reactive.PlatformServices.XML' to folder 'Rx-PlatformServices.2.1.30214.0/lib/Net45'.
Added file 'System.Reactive.PlatformServices.dll' to folder 'Rx-PlatformServices.2.1.30214.0/lib/NetCore45'.
Added file 'System.Reactive.PlatformServices.XML' to folder 'Rx-PlatformServices.2.1.30214.0/lib/NetCore45'.
Added file 'System.Reactive.PlatformServices.dll' to folder 'Rx-PlatformServices.2.1.30214.0/lib/SL4-WindowsPhone71'.
Added file 'System.Reactive.PlatformServices.XML' to folder 'Rx-PlatformServices.2.1.30214.0/lib/SL4-WindowsPhone71'.
Added file 'System.Reactive.PlatformServices.dll' to folder 'Rx-PlatformServices.2.1.30214.0/lib/SL5'.
Added file 'System.Reactive.PlatformServices.XML' to folder 'Rx-PlatformServices.2.1.30214.0/lib/SL5'.
Added file 'System.Reactive.PlatformServices.dll' to folder 'Rx-PlatformServices.2.1.30214.0/lib/WP8'.
Added file 'System.Reactive.PlatformServices.XML' to folder 'Rx-PlatformServices.2.1.30214.0/lib/WP8'.
Added file '_._' to folder 'Rx-PlatformServices.2.1.30214.0/content/Net40'.
Added file '_._' to folder 'Rx-PlatformServices.2.1.30214.0/content/Net45'.
Added file '_._' to folder 'Rx-PlatformServices.2.1.30214.0/content/NetCore45'.
Added file '_._' to folder 'Rx-PlatformServices.2.1.30214.0/content/SL4'.
Added file '_._' to folder 'Rx-PlatformServices.2.1.30214.0/content/SL4-WindowsPhone71'.
Added file '_._' to folder 'Rx-PlatformServices.2.1.30214.0/content/SL5'.
Added file '_._' to folder 'Rx-PlatformServices.2.1.30214.0/content/WP8'.
Added file '_._' to folder 'Rx-PlatformServices.2.1.30214.0/lib/Portable-Net45+WinRT45+WP8'.
Added file '_._' to folder 'Rx-PlatformServices.2.1.30214.0/lib/SL4'.
Added file 'Rx-PlatformServices.2.1.30214.0.nupkg' to folder 'Rx-PlatformServices.2.1.30214.0'.
Successfully installed 'Rx-PlatformServices 2.1.30214.0'.
Installing 'Rx-Main 2.1.30214.0'.
Added file 'Rx-Main.2.1.30214.0.nupkg' to folder 'Rx-Main.2.1.30214.0'.
Successfully installed 'Rx-Main 2.1.30214.0'.
Installing 'reactiveui-core 5.2.0'.
Added file 'ReactiveUI.dll' to folder 'reactiveui-core.5.2.0/lib/Monoandroid'.
Added file 'ReactiveUI.xml' to folder 'reactiveui-core.5.2.0/lib/Monoandroid'.
Added file 'ReactiveUI.dll' to folder 'reactiveui-core.5.2.0/lib/Monomac'.
Added file 'ReactiveUI.mdb' to folder 'reactiveui-core.5.2.0/lib/Monomac'.
Added file 'ReactiveUI.xml' to folder 'reactiveui-core.5.2.0/lib/Monomac'.
Added file 'ReactiveUI.dll' to folder 'reactiveui-core.5.2.0/lib/Monotouch'.
Added file 'ReactiveUI.xml' to folder 'reactiveui-core.5.2.0/lib/Monotouch'.
Added file 'ReactiveUI.dll' to folder 'reactiveui-core.5.2.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'ReactiveUI.xml' to folder 'reactiveui-core.5.2.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'ICSharpCode.NRefactory.CSharp.dll' to folder 'reactiveui-core.5.2.0/tools'.
Added file 'ICSharpCode.NRefactory.dll' to folder 'reactiveui-core.5.2.0/tools'.
Added file 'init.ps1' to folder 'reactiveui-core.5.2.0/tools'.
Added file 'Mono.Cecil.dll' to folder 'reactiveui-core.5.2.0/tools'.
Added file 'Nustache.Core.dll' to folder 'reactiveui-core.5.2.0/tools'.
Added file 'RxUIScaffolding.psm1' to folder 'reactiveui-core.5.2.0/tools'.
Added file 'RxUIViewModelGenerator.exe' to folder 'reactiveui-core.5.2.0/tools'.
Added file 'RxUIViewModelGenerator.exe.config' to folder 'reactiveui-core.5.2.0/tools'.
Added file 'reactiveui-core.5.2.0.nupkg' to folder 'reactiveui-core.5.2.0'.
Successfully installed 'reactiveui-core 5.2.0'.
Installing 'akavache 3.2.0'.
Added file 'Akavache.dll' to folder 'akavache.3.2.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'Akavache.pdb' to folder 'akavache.3.2.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'Akavache.xml' to folder 'akavache.3.2.0/lib/Portable-Net45+WinRT45+WP8'.
Added file 'Akavache.dll' to folder 'akavache.3.2.0/lib/net45'.
Added file 'Akavache.pdb' to folder 'akavache.3.2.0/lib/net45'.
Added file 'Akavache.xml' to folder 'akavache.3.2.0/lib/net45'.
Added file 'Akavache.dll' to folder 'akavache.3.2.0/lib/wp8'.
Added file 'Akavache.pdb' to folder 'akavache.3.2.0/lib/wp8'.
Added file 'Akavache.dll' to folder 'akavache.3.2.0/lib/WinRT45'.
Added file 'Akavache.pdb' to folder 'akavache.3.2.0/lib/WinRT45'.
Added file 'Akavache.pri' to folder 'akavache.3.2.0/lib/WinRT45'.
Added file 'Akavache.dll' to folder 'akavache.3.2.0/lib/MonoMac'.
Added file 'Akavache.dll' to folder 'akavache.3.2.0/lib/MonoAndroid'.
Added file 'Akavache.dll' to folder 'akavache.3.2.0/lib/MonoTouch'.
Added file 'akavache.3.2.0.nupkg' to folder 'akavache.3.2.0'.
Successfully installed 'akavache 3.2.0'.
Unable to resolve dependency 'ReactiveUI-Core (≥ 5.2.0)'.

GetAndFetchLatest doesn't invalidate the correct key

Because GetAndFetchLatest calls Invalidate rather that InvalidateObject the wrong key will be used (not type prefixed).

WinRT LoadImageFromUrl issue

In WinRT I haven't been successful using LoadImageFromUrl.

  MainImage.ImageSource = (await BlobCache.LocalMachine.LoadImageFromUrl(imageMetaData.imageUrl)).ToNative();

The application called an interface that was marshalled for a different thread. (Exception from HRESULT: 0x8001010E (RPC_E_WRONG_THREAD))

   at Windows.UI.Xaml.Media.Imaging.WriteableBitmap..ctor(Int32 pixelWidth, Int32 pixelHeight)
   at Splat.PlatformBitmapLoader.<Load>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Reactive.PlatformServices.ExceptionServicesImpl.Rethrow(Exception exception)
   at System.Reactive.ExceptionHelpers.ThrowIfNotNull(Exception exception)
   at System.Reactive.Subjects.AsyncSubject`1.GetResult()
   at ThePaperWall.WinRT.HubPage.<OnNavigatedTo>d__4.MoveNext() in c:\Users\jimmy_000\Documents\GitHub\ThePaperWallApps\src\ThePaperWall.WinRT\HubPage.xaml.cs:line 130

Expiration time issue

I am making a windows phone 8 app and having issue setting the expiration time.

I have something similar to below
issue is "foo" is not getting cleared from cache even after 5 seconds.

What am I doing wrong?

BlobCache.ApplicationName = "TestApp";

try
{
    var cachedValue = await BlobCache.LocalMachine.GetObjectAsync<string>("foo");
}
catch (Exception exception)
{
}

await BlobCache.LocalMachine.InsertObject("foo", "fooValue", TimeSpan.FromSeconds(5));

System.Collections.Concurrent conflict

Akavache/ConcurrentDictionary.cs

Because this declares the namespace System.Collections.Concurrent it conflicts with another package (System.Threading.Tasks) in Silverlight 5

Any way to change the name or mark it as internal?

Nevermind..I forgot about extern alias.

Unhandled Exception with SQLite - no such table CacheElement

In an app, it usually works, but every now and then when I start it, I get the following exception:

01-16 17:15:14.803 I/MonoDroid(11492): UNHANDLED EXCEPTION: SQLite.SQLiteException: no such table: CacheElement
01-16 17:15:14.803 I/MonoDroid(11492): at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <IL 0x00011, 0x00068>
01-16 17:15:14.803 I/MonoDroid(11492): at System.Reactive.PlatformServices.ExceptionServicesImpl.Rethrow (System.Exception) <IL 0x00006, 0x0006b>
01-16 17:15:14.803 I/MonoDroid(11492): at System.Reactive.ExceptionHelpers.Throw (System.Exception) <IL 0x0000b, 0x00083>
01-16 17:15:14.803 I/MonoDroid(11492): at System.Reactive.Stubs.<.cctor>b__1 (System.Exception) <IL 0x00001, 0x00043>
01-16 17:15:14.803 I/MonoDroid(11492): at System.Reactive.AnonymousSafeObserver`1<System.Collections.Generic.IEnumerable`1<PB8.Models.PersonDto>>.OnError (System.Exception) <0x000b7>
01-16 17:15:14.803 I/MonoDroid(11492): at System.Reactive.ScheduledObserver`1<System.Collections.Generic.IEnumerable`1<PB8.Models.PersonDto>>.Run (object,System.Action`1<object>) <0x0018f>
01-16 17:15:14.803 I/MonoDroid(11492): at System.Reactive.Concurrency.Scheduler/<>c__DisplayClass50`1<object>.<InvokeRec1>b__4d (object) <0x000b3>
01-16 17:15:14.803 I/MonoDroid(11492): at System.Reactive.Concurrency.Scheduler.InvokeRec1<object> (System.Reactive.Concurrency.IScheduler,System.Reactive.Concurrency.Scheduler/Pair`2<object, System.Action`2<object, System.Action`1<object>>>) <0x002af>
01-16 17:15:14.803 I/MonoDroid(11492): at (wrapper delegate-invoke) System.Func`3<System.Reactive.Concurrency.IScheduler, System.Reactive.Concurrency.Scheduler/Pair`2<object, System.Action`2<object, System.Action`1<object>>>, System.IDisposable>.invoke_TResult__this___T1_T2 (System.Reactive.Concurrency.IScheduler,System.Reactive.Concurrency.Scheduler/Pair`2<object, System.Action`2<object, System.Action`1<object>>>) <IL 0x00054, 0x0013b>
01-16 17:15:14.803 I/MonoDroid(11492): at ReactiveUI.Android.AndroidUIScheduler/<Schedule>c__AnonStorey1`1<System.Reactive.Concurrency.Scheduler/Pair`2<object, System.Action`2<object, System.Action`1<object>>>>.<>m__4 () <IL 0x00013, 0x00087>
01-16 17:15:14.803 I/MonoDroid(11492): at Java.Lang.Thread/RunnableImplementor.Run () [0x0000b] in /Users/builder/data/lanes/monodroid-mlion-monodroid-4.12-series/c789d807/source/monodroid/src/Mono.Android/src/Java.Lang/Thread.cs:36
01-16 17:15:14.803 I/MonoDroid(11492): at Java.Lang.IRunnableInvoker.n_Run (intptr,intptr) [0x00009] in /Users/builder/data/lanes/monodroid-mlion-monodroid-4.12-series/c789d807/source/monodroid/src/Mono.Android/platforms/android-19/src/generated/Java.Lang.IRunnable.cs:71
01-16 17:15:14.803 I/MonoDroid(11492): at (wrapper dynamic-method) object.3d7a414c-5b58-4343-ba4c-a0f855415db1 (intptr,intptr) <IL 0x00011, 0x0003b>
Unhandled Exception:

SQLite.SQLiteException: no such table: CacheElement

01-16 17:15:20.739 E/mono    (11492): 
01-16 17:15:20.739 E/mono    (11492): Unhandled Exception:
01-16 17:15:20.739 E/mono    (11492): SQLite.SQLiteException: no such table: CacheElement
01-16 17:15:20.739 E/mono    (11492):   at SQLite.SQLite3.Prepare2 (IntPtr db, System.String query) [0x0001b] in /Users/oren/git/Akavache/Akavache.Sqlite3/SQLite.cs:2351 
01-16 17:15:20.739 E/mono    (11492):   at SQLite.SQLiteCommand.Prepare () [0x00000] in /Users/oren/git/Akavache/Akavache.Sqlite3/SQLite.cs:1659 
01-16 17:15:20.739 E/mono    (11492):   at SQLite.SQLiteCommand+<ExecuteDeferredQuery>c__Iterator0`1[Akavache.Sqlite3.CacheElement].MoveNext () [0x00038] in /Users/oren/git/Akavache/Akavache.Sqlite3/SQLite.cs:1585 
01-16 17:15:20.739 E/mono    (11492):   at System.Collections.Generic.List`1[Akavache.Sqlite3.CacheElement].AddEnumerable (IEnumerable`1 enumerable) [0x00000] in <filename unknown>:0 
01-16 17:15:20.739 E/mono    (11492):   at System.Collections.Generic.List`1[Akavache.Sqlite3.CacheElement]..ctor (IEnumerable`1 collection) [0x00000] in <filename unknown>:0 
01-16 17:15:20.739 E/mono    (11492):   at System.Linq.Enumerable.ToList[CacheElement] (IEnumerable`1 source) [0x00000] in <filename unknown>:0 
01-16 17:15:20.739 E/mono    (11492):   at SQLite.SQLiteCommand.ExecuteQuery[CacheElement] () [0x00000] in /Users/oren/git/Akavache/Akavache.Sqlite3/SQLite.cs:1554 
01-16 17:15:20.739 E/mono    (11492):   at SQLite.S
01-16 17:15:20.739 E/mono-rt (11492): [ERROR] FATAL UNHANDLED EXCEPTION: SQLite.SQLiteException: no such table: CacheElement
01-16 17:15:20.739 E/mono-rt (11492):   at SQLite.SQLite3.Prepare2 (IntPtr db, System.String query) [0x0001b] in /Users/oren/git/Akavache/Akavache.Sqlite3/SQLite.cs:2351 
01-16 17:15:20.739 E/mono-rt (11492):   at SQLite.SQLiteCommand.Prepare () [0x00000] in /Users/oren/git/Akavache/Akavache.Sqlite3/SQLite.cs:1659 
01-16 17:15:20.739 E/mono-rt (11492):   at SQLite.SQLiteCommand+<ExecuteDeferredQuery>c__Iterator0`1[Akavache.Sqlite3.CacheElement].MoveNext () [0x00038] in /Users/oren/git/Akavache/Akavache.Sqlite3/SQLite.cs:1585 
01-16 17:15:20.739 E/mono-rt (11492):   at System.Collections.Generic.List`1[Akavache.Sqlite3.CacheElement].AddEnumerable (IEnumerable`1 enumerable) [0x00000] in <filename unknown>:0 
01-16 17:15:20.739 E/mono-rt (11492):   at System.Collections.Generic.List`1[Akavache.Sqlite3.CacheElement]..ctor (IEnumerable`1 collection) [0x00000] in <filename unknown>:0 
01-16 17:15:20.739 E/mono-rt (11492):   at System.Linq.Enumerable.ToList[CacheElement] (IEnumerable`1 source) [0x00000] in <filename unknown>:0 
01-16 17:15:20.739 E/mono-rt (11492):   at SQLite.SQLiteCommand.ExecuteQuery[CacheElement] () [0x00000] in /Users/oren/git/Akavache/Akavache.Sqlite3/SQLite.cs:1554 
The program 'Mono' has exited with code 0 (0x0).

Static caches not initialized for WP8 (3.0.2)

Static cache properties (excluding InMemory) are not getting initialized.

Repro:

• Start a new WP8 project (VS 2012 Update 3)
• Add Nuget dependency to Akavache 3.0.2
• Add App.xaml.cs code to set ApplicationName
• Add Main.xaml.cs code to access UserAccount/Secure/LocaMachine
• Null Ref occurs

Also note build warnings:

Warning 1 The primary reference "Akavache" could not be resolved because it has an indirect dependency on the .NET Framework assembly "System.Net.Requests, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which has a higher version "4.0.0.0" than the version "3.9.0.0" in the current target framework. AkavacheTest
Warning 2 The primary reference "Akavache" could not be resolved because it has an indirect dependency on the .NET Framework assembly "System.Net.Primitives, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which has a higher version "4.0.0.0" than the version "3.9.0.0" in the current target framework. AkavacheTest

May be related to http://connect.microsoft.com/VisualStudio/feedback/details/770242