Sybase acquiring Aleri?

February 2, 2010 Leave a comment

Looks like Sybase is in the process of acquiring Aleri.

It’ll be interesting to see how Sybase manages Aleri and Coral8 products, in both development and deployment (licensing).

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Categories: CEP, Finance

FIXatdl v1.1 Release Candidate

February 1, 2010 Leave a comment

The Algoithmic Trading Working Group uploaded the v1.1 Release Candidate (internal build v2.7.0) for FIXatdl recently. You’ll need to register in order to download the files.

So start coding up those algo UIs already!

Here’s an earlier post that highlights some of the breaking changes with previous builds.

Categories: .net, Finance

ProtoBuf.net – Handling optional primitives

January 27, 2010 1 comment

If you are dealing with protos containing optional primitives, it’s not immediately obvious how you’d deal with them in C#.

For example, if the proto contains an optional int and you generated the C# class, the results would as follows:

optional int32 bar_ukey = 13;

>protogen -i:BarTest.proto -o:BarTestProto.cs

private int _bar_ukey =default(int);
[ProtoBuf.ProtoMember(13, IsRequired = false, Name=@"bar_ukey", DataFormat = ProtoBuf.DataFormat.TwosComplement)][System.ComponentModel.DefaultValue(default(int))]
public int bar_ukey
{
get { return _bar_ukey; }
set { _bar_ukey = value; }
}

As you can see, the highlighted default value doesn’t take the optional nature of the field into account.

To fix this, protogen needs to be run with detectMissing argument as follows:
protogen -i:BarTest.proto -o:BarTestProto.cs -p:detectMissing
which results in the property getting generated as


private int? _bar_ukey;
[ProtoBuf.ProtoMember(13, IsRequired = false, Name=@"bar_ukey", DataFormat = ProtoBuf.DataFormat.TwosComplement)]
public int bar_ukey
{
get { return _bar_ukey?? default(int); }
set { _bar_ukey = value; }
}
[System.Xml.Serialization.XmlIgnore]
[System.ComponentModel.Browsable(false)]
public bool bar_ukeySpecified
{
get { return _bar_ukey != null; }
set { if (value == (_bar_ukey== null)) _bar_ukey = value ? bar_ukey : (int?)null; }
}
private bool ShouldSerializebar_ukey() { return bar_ukeySpecified; }
private void Resetbar_ukey() { bar_ukeySpecified = false; }

Side note: Also tucked away in the -p template property observable and preObservable options for the observable pattern.

Categories: .net

C#: Hidden or lesser known features?

January 26, 2010 1 comment

Aaron blogged about some C# features that aren’t very well known. I won’t call them hidden, actually, as I came across them in the documentation and have been using coalesce, assignments, and to a lesser extent, partial methods (when I do use v3.5).

In any case, here’s another list that’s related. You never know what you’ll find.

Categories: .net

Kindle Development Kit?

January 21, 2010 1 comment

Amazon just announced an upcoming development kit for Kindle. As a Kindle user, the possibilities are interesting. Not sure how much I’ll use the active content though, given the enormous drain on the battery caused by wireless usage.

Categories: Uncategorized

Useful WPF binding

January 12, 2010 Leave a comment

See here.

Categories: .net Tags:

Entity Framework update

January 12, 2010 Leave a comment

This might be old news to some, but I’ve only been watching from the outskirts so far.

Categories: .net