I have created a new index that is populated using an indexer. The indexer's datasource is a SQL view that has a Timestamp column of type datetime. Since we don't want a full reindexing each time the indexer runs, this column should be used to determine which data have changed since the last indexer run.
According to the documentation we need to create or update the datasource by setting the HighWatermarkColumnName and ODataType to the DataChangeDetectionPolicy object. The example in the documentation uses the REST API and there is also way to do it using the azure search portal directly.
However I want to do it using .netsdk and so far I haven't been able to do so. I am using Azure.Search.Documents(11.2.0 - beta.2). Here is the part of the code I use to create the datasource:
SearchIndexerDataSourceConnection CreateIndexerDataSource()
{
var ds = new SearchIndexerDataSourceConnection(DATASOURCE,
SearchIndexerDataSourceType.AzureSql,
this._datasourceConStringMaxEvents,
new SearchIndexerDataContainer(SQLVIEW));
//ds.DataChangeDetectionPolicy = new DataChangeDetectionPolicy();
return ds;
}
The commented code is what I tried to do to initialize the DataChangeDetectionPolicy but there is no ctor exposed. Am I missing something?
Thanks in advance.
Instead of using DataChangeDetectionPolicy, you will need to use HighWaterMarkChangeDetectionPolicy which is derived from DataChangeDetectionPolicy.
So your code would be something like:
ds.DataChangeDetectionPolicy = new HighWaterMarkChangeDetectionPolicy("Timestamp");
Related
I need to support database logging.
For that I decided to use nlog because it brings database support.
But first of all I need to setup the configuration programatically.
As far as I understood it I have to set the layout for the target.
But the class "DatabaseTarget" does not have any property related to Layout :/.
var dbTarget = new DatabaseTarget();
dbTarget.ConnectionString = LogConnectionString;
dbTarget.CommandType = System.Data.CommandType.StoredProcedure;
dbTarget.CommandText = "exec dbo.InsertLog #level=${level}, #callSite=${callsite}, #message=${message}, #stackTrace=${stacktrace}, #machinename=${machinename}, #processname=${processname}";
Is the layout definition really necessary for the DatabaseTarget. If so how do I set it programatically?
Additionally I want to pass some information. But I am not sure how I can assign those informations for the procedure.
As far as I understood it I can assign those variables:
https://github.com/nlog/nlog/wiki/Layout-Renderers
But NLog support generic arguments with his Log Method. It looks like this:
_nLog.Log<AJourFaultLevel>(ConvertLogLevel(logEntry.Level), logEntry.Message, logEntry.Fault);
How can I assign the passed "logEntry.Fault" value for my stored procedure?
Best regards
Your current log-statement injects logEntry.Fault as parameter into string.Format(logEntry.Message, logEntry.Fault):
_nLog.Log<AJourFaultLevel>(ConvertLogLevel(logEntry.Level), logEntry.Message, logEntry.Fault);
If you are using NLog 4.5 then you can use structured-logging where you can name the parameter like this:
_nLog.Log<AJourFaultLevel>(ConvertLogLevel(logEntry.Level), "Fault occurred: {AJourFaultLevel}", logEntry.Fault);
Then you can access the named parameter using ${event-properties:item=}:
dbTarget.CommandText = "exec dbo.InsertLog #level=${level}, #callSite=${callsite}, #message=${message}, #stackTrace=${stacktrace}, #machinename=${machinename}, #processname=${processname}, #faultLevel=${event-properties:item=AJourFaultLevel}";
As shown in my previous post QODBC/QODBC3 is not that good to work with databases. I have found a year old suggestion here to use ADODB for SQL Server. Can anyone give an example showing or suggest a link explaining How to connect, query and get result using ADODB.Connection in Qt?
You need to use QAxObject.
First you should take a look at:
QAxObject documentation: doc.qt.io/qt-5/qaxobject.html
Active X data object documentation: msdn.microsoft.com/en-us/library/windows/desktop/ms676795(v=vs.85).aspx
Here is a sample code to get you started:
// Create connection
QAxObject *connection = new QAxObject("ADODB.Connection");
connection->dynamicCall("Open(\"Provider=SQLOLEDB.1;Integrated Security=SSPI;Initial Catalog=Inaz;Data Source=SERVER02\")");
// Execute query and get recordset
QAxObject *recordSet = connection->querySubObject("Execute(\"select column01 from table01\")");
// Get fields
// or check https://msdn.microsoft.com/en-us/library/ms681510(v=vs.85).aspx to see what you can do with and how to use a recordset
QAxObject *fields = recordSet->querySubObject("Fields");
Note: You will need to call CoInitialize to use ADODB. However QGuiApplication and QApplication call it internally so you might not always need to make the call yourself.
I would like to achieve dictionary like data pattern that can be accessed from the
java script. Something like this:
pseudo Code:
for all records:
{
rec = //Get the Record
rec["Name"]
rec["Address"]
}
I am trying to achieve with CefV8Accessor, but i am not getting near to the solution.
Kindly provide few links for the reference, as i see the documentation is very less from chromium embedded.
If I understand correctly, you're trying to create a JS "dictionary" object for CEF using C++. If so, here's a code snippet that does that:
CefRefPtr<CefV8Value> GetDictionary(__in const wstring& sName, __in const wstring& sAddress)
{
CefRefPtr<CefV8Value> objectJS = CefV8Value::CreateObject(NULL);
objectJS->SetValue(L"Name", sName, V8_PROPERTY_ATTRIBUTE_NONE);
objectJS->SetValue(L"Address", sAddress, V8_PROPERTY_ATTRIBUTE_NONE);
return objectJS;
}
The CefV8Accessor can also be used for that matter, but that's only if you want specific control over the set & get methods, to create a new type of object.
In that case you should create a class that inherits CefV8Accessor, implement the Set and Get methods (in a similar way to what appears in the code above), and pass it to the CreateObject method. The return value would be an instance of that new type of object.
I strongly suggest to browse through this link, if you haven't already.
I found this article useful when indexing documents, however, how can I attach additional fields so I can pass in, say, the ID of the document in our database for use in displaying the search results? I thought by using the Fields (Of the ExtractParameters class) property I could index additional data with the document, but that doesn't seem to work or that is not its function.
Example code:
var solr = ObjectLocator.Instance.Resolve<ISolrOperations<IndexDocument>>();
var guid = Guid.NewGuid().ToString();
using (var fileStream = System.IO.File.OpenRead(Server.MapPath("~/files/") + "greenroof.pdf"))
{
var response =
solr.Extract(
new ExtractParameters(fileStream, "greenRoof1234")
{
ExtractFormat = ExtractFormat.Text,
ExtractOnly = false,
Fields = new[] { new ExtractField("field1", "value1"), new ExtractField("field2", "value2") }
});
}
#aitchnyu is correct, passing the values via the literal.field=value method is the correct way to do this.
However, according to this post on ExtractingRequestHandler support in the SolrNet Google Group, there was a bug with the ExtractParameters.Fields not working properly. This was fixed in the 0.4.0.X versions of SolrNet. Please make sure you are using one of the latest versions of SolrNet. You can obtain that by one of the following means:
Project Site Downloads
NuGet PreRelease Package
Also that discussion has some good examples of using the ExtractingRequestHandler in SolrNet as well as a workaround for adding the additional field values if you cannot upgrade to a newer version of SolrNet.
This is sufficient: http://wiki.apache.org/solr/ExtractingRequestHandler#Literals .
In general use a literal.field=value while uploading.
It turned out not to be an issue with SOLRNet, but my knowledge of SOLR, in general. I needed to specify the fields in my schema. After i added the fields to my schema they were visible in my SOLR query.
I am storing a type in the EPiServer DDS that has a few properties such as string and guid. I now want to add a new property of type string to that type. How is it possible to get the DDS to recognise the new property added to the type and add it to the schema for the type in the DDS.
You need to remap the type to the store like this:
Let's say your class is called Car
var store = DynamicDataStoreFactory.Instance.GetStore(typeof(Car));
store.StoreDefinition.Remap(typeof(Car));
store.StoreDefinition.CommitChanges();
If you're then going to use the store instance directly after then do a refresh:
store.Refresh();
You can find more info about the DDS here:
http://world.episerver.com/Documentation/Items/Tech-Notes/EPiServer-CMS-6/EPiServer-CMS-60/Dynamic-Data-Store/
Paul Smith
Developer Evangelist
EPiServer
The next version of CMS / EPiServer Framework will ship with a PowerShell cmdlet to do this from a script.
For the CMS 6 version I suggest you add the code to the Global.asax or create an initialization module
(http://world.episerver.com/Blogs/Magnus-Strale/Dates/2010/2/Changes-in-the-initialization-system-from-EPiServer-CMS-6-RC1/)
You can first check if the type and store are aligned:
var store = DynamicDataStoreFactory.Instance.GetStore(typeof(Car));
if (!store.StoreDefinition.ValidateAgainstMappings(typeof(Car), false))
{
store.StoreDefinition.Remap(typeof(Car));
store.StoreDefinition.CommitChanges();
}
This way you only remap when needed.