Just a quick note to say that I have made some minor changes to DynamoDb.SQL to: Add support for specifying the ScanIndexForward option(see DynamoDB API doc here for detail) in a Query operation using an optional “ORDER” clause Fixed a bug where when querying using the extension methods on the DynamoDBContext class, the LIMIT clause …
Just a quick note to say that I have updated the JSON serializers benchmark to use the latest Nuget versions of ServiceStack.Text, Json.Net and JsonFX. I have also included the JSON and BSON serializers from the MongoDB C# Driver in the test, and since BSON is a binary format I have included protobuf-net as a …
JSON serializers benchmark updated – including MongoDB Driver Read More »
Amazon’s DynamoDB is a wonderful product – scalable, durable, fast, with predictable latency numbers unlike SimpleDB. However, the only gripe I have with DynamoDB is that there is no built-in support for a query language, which makes life rather difficult when you want to perform a query or a scan against the data you have …
DynamoDb.SQL – a SQL-like external DSL for Amazon DynamoDB Read More »
In general, when you see async void in your code it’s bad news, because: you can’t wait for its completion (as mentioned in this post already) any unhandled exceptions will terminate your process (ouch!) Suppose you have a timer event that fires every once in a while and you want to do some asynchronous …
With the official release of .Net 4.5 and Visual Studio 2012, I suspect many .Net developers will be rushing to rewrite their data access or network layers (amongst many many other things!) to take advantage of the new async-await (see the excellent 101 examples here) language feature in C#, which means you’ll likely be working …
F# – helper functions to convert between Async<unit> and Task Read More »
In Erlang, we have the Supervisor behaviour which makes it very easy to provide the means to monitor and restart a whole network of workers and other supervisors based on some configured strategy. The MailboxProcessor (aka agents) in F# doesn’t come with the same higher-level abstractions (such as Erlang’s gen_server, gen_fsm behaviours) by default, but …
In F# you can write an extension method like this: Whilst this will work perfectly fine in your F# code, the extension method will not be visible to any C# code using the FileInfo type because F# and C# compiles extension methods differently. To make C#-compatible extension methods in F#, here’s what you need to …
Since my previous post on Filbert I have added a simple but functional BERT-RPC client which I have managed to test against native Erlang modules running on Ernie. To make it easier for you to try it out I’ve uploaded the package to NuGet, which you can download from here, or run the simple NuGet …
Found a useful little snippet that converts a C# dictionary to F#’s map which uses the built-in KeyValue active pattern:
I spent the last couple of nights and put together a small BERT serializer for .Net called Filbert. What’s BERT? BERT (Binary ERlang Term) is a binary format based on Erlang’s binary serialization format (as used by erlang:term_to_binary/1) but supports a couple of complex types such as boolean, dictionary and time, in additional to …
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