I am developing a Quickfix/n initiator to be used with several counterparties, in the same instance, all using the same version of FIX (4.2 in this instance) but utilizing a unique messaging specification and I would like to use Intellisense/ReSharper to develop said initiator.
Previously I have used the generate.rb script to create source code from a modified FIX##.xml file but would like to use something like FIX42.DeutcheBank.xml, FIX42.CME.xml, FIX42.Whatever, to generate the source with the generate.rb ruby script or a modified version thereof so they can be parsed by IntelliSense/ReSharper and I am having issues because they all use "FIX.4.2" as begin strings and thus causes a compile error.
I know that I can just refer to a field/group via a key like Tags["BidForwardPointsCME"] or something similar with a DataDictionary but, as stated, I would like to be able to use IntelliSense/ReSharper and reference the message fields/groups with something like Quickfix.CounterParty.WhateverField and using the same dll.
I've banged my head against the internet for answers for 3-4 days with no luck - Is what I would like to do possible? If so, how would one go about it?
Hi in advance to Grant Birchmeier <:-]
For anyone that ever is trying to do this, the answer is pretty simple - probably not the most efficient but it works as far as I know.
the trick is to edit two ruby generation scripts (messages_gen.rb and generate.rb) and place the additional FIX specification XML file(s) in the spec/fix directory.
Assuming that you have a custom FIX xml file for Foo Exchange and that the Foo Exchange uses FIX 4.2, you need to name it FIX.xml (Example: FIXFooExchange.xml)
Next, you will have to override the FIX version in messages_gen.rb like so:
def self.gen_basemsg fixver, destdir
beginstring = fixver
if beginstring.match(/^FIX50/)
beginstring = "FIXT11"
end
if beginstring.match(/^FIXFooExchange/)
beginstring = "FIX42"
end
Next you need to add your custom fix version to 6 method definitions in the generate.rb file.
Those methods are:
initialize
agg_fields
get_field_def
generate_messages
generate_csproj
generate_message_factories
Here are a few examples:
def initialize
#fix40 = FIXDictionary.load spec('FIX40')
#fix41 = FIXDictionary.load spec('FIX41')
#fix42 = FIXDictionary.load spec('FIX42')
#fix43 = FIXDictionary.load spec('FIX43')
#fix44 = FIXDictionary.load spec('FIX44')
#fix50 = FIXDictionary.load spec('FIX50')
#fix50sp1 = FIXDictionary.load spec('FIX50SP1')
#fix50sp2 = FIXDictionary.load spec('FIX50SP2')
#fixFooExchange = FIXDictionary.load spec('FIXFooExchange')
#src_path = File.join File.dirname(__FILE__), '..', 'QuickFIXn'
end
def get_field_def fld_name
# we give priority to latest fix version
fld = merge_field_defs(
#fix50sp2.fields[fld_name],
#fix50sp1.fields[fld_name],
#fix50.fields[fld_name],
#fix44.fields[fld_name],
#fixFooExchange.fields[fld_name],
#fix43.fields[fld_name],
#fix42.fields[fld_name],
#fix41.fields[fld_name],
#fix40.fields[fld_name]
)
End
Basically you just copy one line and replace the fix version with the customized exchange xml data dictionary name.
The class BeginString in FixValues.cs should be modified to look like this:
public class BeginString
{
public const string FIXT11 = "FIXT.1.1";
public const string FIX50 = "FIX.5.0";
public const string FIX44 = "FIX.4.4";
public const string FIX43 = "FIX.4.3";
public const string FIXFooExchange = "FIX.4.2";
public const string FIX42 = "FIX.4.2";
public const string FIX41 = "FIX.4.1";
public const string FIX40 = "FIX.4.0";
}
The Values.cs file contains a single class which should be changed to look like this:
public class Values
{
public const string BeginString_FIXT11 = "FIXT.1.1";
public const string BeginString_FIX50 = "FIX.5.0";
public const string BeginString_FIX44 = "FIX.4.4";
public const string BeginString_FIX43 = "FIX.4.3";
public const string BeginString_FIXFooExchange = "FIX.4.2";
public const string BeginString_FIX42 = "FIX.4.2";
public const string BeginString_FIX41 = "FIX.4.1";
public const string BeginString_FIX40 = "FIX.4.0";
}
Do those things and then run the generate.bat file and you should be able to reference namespaces via '.' rather than using the base FIX version.
Here are some examples:
using QuickFix.FIXFooExchange;
using Message = QuickFix.Message;
QuickFix.FIXFooExchange.MessageFactory mF = new QuickFix.FIXFooExchange.MessageFactory();
and reference message properties like:
string customField = message.yourCustomFieldName.getValue().ToUpper();
instead of by
string customField = message["yourCustomFieldName"].getValue().ToUpper();
Lastly, you need to edit 2 .cs files: FixValues.cs and Values.cs
I've tested this pretty extensively and it seems to work but I would advise that you do testing before you put anything in production.
So the problem is you want 1 QF initiator process to connect to several different counterparties where each session uses a separate data dictionary?
Don't you do this using DataDictionary=somewhere/FIX42.xml in the configuration file?
See also http://quickfixn.org/tutorial/configuration.html AppDataDictionary: This setting supports the possibility of a custom application data dictionary for each session.
Related
I'm trying to figure out how to use Android's Room library for implementing a prepopulated sqlite database in my app and I came across this Android tutorial. One of the lines (the one in the title) confuses me though, because in another tutorial (also by Android), this line isn't present. Why is this line of code present in the first tutorial but not the second? What is its purpose?
I ask this because my code (which I'm basing off the second tutorial) doesn't include this line and yet this post by a different user attempting to do something similar with a prepopulated database does include it.
Here is some of the code I have (each of the fields has a getter method which just returns this.thatfield'sname):
#Entity (tableName = "words")
public class Words {
#PrimaryKey
#NonNull
#ColumnInfo (name = "word_id")
private int wordId;
#ColumnInfo(name = "a_words")
private String aWords;
#ColumnInfo(name = "b_words")
private String bWords;
#ColumnInfo(name = "c_words")
private String cWords;
This code gives me a "Cannot find setter for field" but just changing the fields from public to private seems to solve that (not sure if this is the best way to solve this error, though).
Why is this line of code present in the first tutorial but not the second?
That line is an additional class constructor that takes 1 non-null String and sets the mWord member/variable to the provided String.
Without then you can only use myWord = new Word(); to instantiate a Word object and the value would be either the default value if provided or null.
With the additional constructor then you could use both
myWord = new Word();
or
myOtherWord = new Word("A Word");
So, in short it's provided an alternative way of constructing/instantiating a new Object of that Class.
Using your code then you could have, for example :-
#Entity(tableName = "words")
class Words {
#ColumnInfo(name = "word_id")
#PrimaryKey
private int wordId;
#ColumnInfo(name = "a_words")
String aWords;
#ColumnInfo(name = "b_words")
String bWords;
#ColumnInfo(name = "c_words")
String cWords;
public void setWordId(int wordId, String aWord, String bWords, String c) {
this.wordId = wordId;
this.aWords = aWord;
this.bWords = bWords;
this.cWords = c;
}
}
Note for demonstration the parameter names use 3 different standards, ideally you would stick to a single standard/convention for naming the parameters.
So now you could use the one constructor that expects 4 parameters e.g.
myWord = new Words(1,"Apple","Banana","Cherry");
which equates to
myWord = new Words();
myWord.wordId = 1;
myWord.aWords = "Apple;
myWord.bWords = "Banana";
myWord.cWords = "Cherry";
As you have specified a constructor, the default constructor is no longer usable.
What is its purpose?
As can be seen, additional constructors, can reduce the amount of coding, there use will also prompt for the values (hence the use of useful parameter names improves i.e. c as above is not very meaningful at all (although in conjunction with the other parameters if would be better than x))
I am recording the application through Wiremock using JAVA DSL, Do we have the option to customize the mapping file names? instead of getting the filename which is generated from wiremock..
Example: searchpanel_arrivalairport_th-72f9b8b7-076f-4102-b6a8-aa38710fde1b.json (Generated form wiremock using java )
I am expecting the above file name with my desired naming convention like
seacrpanel_airport_LGW.json
Custom filenames can be added by customizing StubMappingJsonRecorder.
I added CustomStubMappingJsonRecorder and override writeToMappingAndBodyFile method.
if(fileName!=null && !fileName.equals("")){
mappingFileName=fileName+"-mapping.json";
bodyFileName=fileName+"-body.json";
}else {
mappingFileName = UniqueFilenameGenerator.generate(request.getUrl(),
"mapping", filed);
bodyFileName = UniqueFilenameGenerator.generate(request.getUrl(), "body",
fileId, ContentTypes.determineFileExtension(request.getUrl(),
response.getHeaders().getContentTypeHeader(), body));
}
There's no easy way to do this at the moment. It is however possible. As #santhiya-ps says you need to write your own implementation of RequestListener, probably using StubMappingJsonRecorder as a template.
You can't extend it and override writeToMappingAndBodyFile as that method is private, but that is the method you probably want to change.
import com.github.tomakehurst.wiremock.common.*;
import com.github.tomakehurst.wiremock.core.*;
import com.github.tomakehurst.wiremock.http.*;
import java.util.List;
import static com.github.tomakehurst.wiremock.core.WireMockApp.*;
class NameTemplateStubMappingJsonRecorder implements RequestListener {
private final FileSource mappingsFileSource;
private final FileSource filesFileSource;
private final Admin admin;
private final List<CaseInsensitiveKey> headersToMatch;
private final IdGenerator idGenerator = new VeryShortIdGenerator();
public NameTemplateStubMappingJsonRecorder(Admin admin) {
this.mappingsFileSource = admin.getOptions().filesRoot().child(MAPPINGS_ROOT);
this.filesFileSource = admin.getOptions().filesRoot().child(FILES_ROOT);
this.admin = admin;
this.headersToMatch = admin.getOptions().matchingHeaders();
}
#Override
public void requestReceived(Request request, Response response) {
// TODO copy StubMappingJsonRecorder changing as required...
}
}
You can then register your RequestListener as so:
WireMockServer wireMockServer = new WireMockServer();
wireMockServer.addMockServiceRequestListener(
new NameTemplateStubMappingJsonRecorder(wireMockServer)
);
wireMockServer.start();
So long as you still store the mapping files in the expected directory (stored in FileSource mappingsFileSource above, which will be ${rootDir}/mappings, where rootDir is configured as explained in Configuration - File Locations) they should be loaded successfully as all files with extension json in that dir are loaded as mappings.
It would be much easier if StubMappingJsonRecorder took a strategy for generating these names - it might be worth creating an issue on the WireMock repo asking for an easier way to do this. I'd suggest getting an agreement on a basic design before raising a PR though.
With the help of other Stackoverflow users, I have gone some way to my solution but have come to a halt.
I would like to build some generic classes in an app_code .cshtml file eg one would be to return property values from documents from a function eg
public static string docFieldValue(int docID,string strPropertyName){
var umbracoHelper = new Umbraco.Web.UmbracoHelper(Umbraco.Web.UmbracoContext.Current);
var strValue = "";
try{
strValue = umbracoHelper.Content(docID).GetPropertyValue(strPropertyName).ToString();
}
catch(Exception ex){
strValue = "Error - invalid document field name (" + strPropertyName + ")";
}
var nContent = new HtmlString(strValue);
return nContent;
}
This works ok for returning one field (ie property) from a document. However, if I wanted to return 2 or more, ideally, I would store the returned node in a variable or class and then be able to fetch property values repeatedly without having to look up the document with each call
ie without calling
umbracoHelper.Content(docID).GetPropertyValue(strPropertyName).ToString();
with different strPropertyName parameters each time, as I assume that will mean multiple reads from the database).
I tried to build a class, with its properties to hold the returned node
using Umbraco.Web;
using Umbraco.Core.Models;
...
public static Umbraco.Web.UmbracoHelper umbracoHelper = new Umbraco.Web.UmbracoHelper(Umbraco.Web.UmbracoContext.Current);
public static IPublishedContent docNode;
...
docNode = umbracoHelper.Content(docID);
but this crashed the code. Can I store the node in a property on a class, and if so, what type is it?
First of all, using a .cshtml file is unnecessary, use a .cs file instead :-) CSHTML files are for Razor code and HTML and stuff, CS files are for "pure" C#. That might also explain why your last idea crashes.
Second of all, UmbracoHelper uses Umbracos own cache, which means that the database is NOT touched with every request. I would at least define the umbracoHelper object outside of the method (so it gets reused every time the method is called instead of reinitialised).
Also, beware that property values can contain all kinds of other object types than strings.
EDIT
This is an example of the entire class file - my example namespace is Umbraco7 and my example class name is Helpers:
using Umbraco.Web;
namespace Umbraco7
{
public class Helpers
{
private static UmbracoHelper umbracoHelper = new UmbracoHelper(UmbracoContext.Current);
private static dynamic docNode;
public static string docFieldValue(int docID, string strPropertyName)
{
docNode = umbracoHelper.Content(docID);
return docNode.GetPropertyValue(strPropertyName).ToString();
}
}
}
This is an example how the function is called inside a View (.cshtml file inside Views folder):
#Helpers.docFieldValue(1076, "introduction")
Helpers, again, is the class name I chose. It can be "anything" you want. I've just tested this and it works.
I suggest you read up on general ASP.NET MVC and Razor development, since this is not very Umbraco specific.
All INET Nordic FIX protocols will be enhanced by extending to nanosecond granularity timestamps on 16.oktober 2015 (see notification and section 3.1.1 in the spec).
The timestamps will look like this: 20150924-10:35:20.840117690
quickfix currently rejects messages that contain fields with this new format with the error: Incorrect data format for value
Are there any plans to support this new format? Or maybe some workaround?
You can first try modifying your data dictionary. For example if you are using fix42.xml that comes with QuickFIX, you can change the affected timestamp fields from type='UTCTIMESTAMP' to type='STRING'.
If that isn't enough, you should instead write a patch against QuickFIX in C++, which should be somewhat straightforward once you know where to patch it, which I think is UtcTimeStampConvertor, around here: https://github.com/quickfix/quickfix/blob/master/src/C%2B%2B/FieldConvertors.h#L564
I think you need to add a case 27: above case 21: near the top, because your format has six extra digits. It looks like the rest of the function doesn't care about the total field length.
Of course if you want to actually inspect the sub-millisecond precision part of these timestamps, you'll need to do more.
No plans in QF/n, but only because this is the first I've heard of this.
I'll need to write some tests to see what the repercussions are. It may be that the time/date parser just truncates the extra nano places when it converts the string to a DateTime.
I've opened an issue: https://github.com/connamara/quickfixn/issues/352
This change is as far as I know kind of breaking the fix protocol definition of timestamps but that's another story.
There is a static class in QuickFixn called DateTimeConverter under QuickFix/Fields/Converters.
To get this to work correctly you would need to add format strings in lines in that class.
Add "yyyyMMdd-HH:mm:ss.fffffff" to DATE_TIME_FORMATS and "HH:mm:ss.fffffff" to TIME_ONLY_FORMATS so that it would look like this.
/// <summary>
/// Convert DateTime to/from String
/// </summary>
public static class DateTimeConverter
{
public const string DATE_TIME_FORMAT_WITH_MILLISECONDS = "{0:yyyyMMdd-HH:mm:ss.fff}";
public const string DATE_TIME_FORMAT_WITHOUT_MILLISECONDS = "{0:yyyyMMdd-HH:mm:ss}";
public const string DATE_ONLY_FORMAT = "{0:yyyyMMdd}";
public const string TIME_ONLY_FORMAT_WITH_MILLISECONDS = "{0:HH:mm:ss.fff}";
public const string TIME_ONLY_FORMAT_WITHOUT_MILLISECONDS = "{0:HH:mm:ss}";
public static string[] DATE_TIME_FORMATS = { "yyyyMMdd-HH:mm:ss.fffffff", "yyyyMMdd-HH:mm:ss.fff", "yyyyMMdd-HH:mm:ss" };
public static string[] DATE_ONLY_FORMATS = { "yyyyMMdd" };
public static string[] TIME_ONLY_FORMATS = { "HH:mm:ss.fffffff", "HH:mm:ss.fff", "HH:mm:ss" };
public static DateTimeStyles DATE_TIME_STYLES = DateTimeStyles.AssumeUniversal | DateTimeStyles.AdjustToUniversal;
public static CultureInfo DATE_TIME_CULTURE_INFO = CultureInfo.InvariantCulture;
I am implementing a custom IBsonSerializer with the official MongoDB driver (C#). I am in the situation where I must serialize and deserialize a Guid.
If I implement the Serialize method as follow, it works:
public void Serialize(BsonWriter bsonWriter, Type nominalType, object value, IBsonSerializationOptions options)
{
BsonBinaryData data = new BsonBinaryData(value, GuidRepresentation.CSharpLegacy);
bsonWriter.WriteBinaryData(data);
}
However I don't want the Guid representation to be CSharpLegacy, I want to use the standard representation. But if I change the Guid representation in that code, I get the following error:
MongoDB.Bson.BsonSerializationException: The GuidRepresentation for the writer is CSharpLegacy, which requires the subType argument to be UuidLegacy, not UuidStandard.
How do I serialize a Guid value using the standard representation?
Old question but in case someone finds it on google like I did...
Do this once:
BsonDefaults.GuidRepresentation = GuidRepresentation.Standard;
For example, in a Web Application/Web API, your Global.asax.cs file is best place to add it once
public class WebApiApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
BsonDefaults.GuidRepresentation = GuidRepresentation.Standard;
//Other code...below
}
}
If you don't want to modify the global setting BsonDefaults.GuidRepresentation (and you shouldn't, because modifying globals is a bad pattern), you can specify the setting when you create your collection:
IMongoDatabase db = ???;
string collectionName = ???;
var collectionSettings = new MongoCollectionSettings {
GuidRepresentation = GuidRepresentation.Standard
};
var collection = db.GetCollection<BsonDocument>(collectionName, collectionSettings);
Then any GUIDs written to the collection will be in the standard format.
Note that when you read records from the database, you will get a System.FormatException if the GUID format in the database is different from the format in your collection settings.
It looks like what's happening is when you are not explicitly passing the GuidRepresentation to BsonBinaryData constructor, it defaults to passing GuidRepresentation.Unspecified and that ultimately maps to GuidRepresentation.Legacy (see this line in the source)
So you need to explicitly pass the guidRepresentation as a third argument to BsonBinaryData set to GuidRepresentation.Standard.
edit: As was later pointed out, you can set BsonDefaults.GuidRepresentation = GuidRepresentation.Standard if that's what you always want to use.