I have saved certain MDX query and I run them using ADOMD.NET. I get CellSet back which I convert into dataset. All this is working fine. Now the DB team has changed the cube structure. They have updated the DimesnionName, Attribute Name etc. Some dimensions got renamed and some got deleted. Becuase of this I am unable to run my saved queries. I want to create a console application, which will take list of keys ([DimensionName].[AttributeName] or [DimensionName].[AttributeName].[MemeberName] format) and it will tell me following keys does not exists.
Please let me know if this is possible programatically. I dont want to check it manually.
Kindly share a link or code which will help me acheive this.
Thank you.
If you're using ADOMD already this should be no problem, just use the metadata queries:
http://msdn.microsoft.com/en-us/library/ms123485.aspx
Alternatively, AMO is nice http://msdn.microsoft.com/en-us/library/microsoft.analysisservices.aspx
I use it in SSIS for processing, you could easily use it in .Net to test existence of elements:
using Microsoft.AnalysisServices;
...
Server server = new Server();
server.Connect(cubeConnectionString);
Database database = server.Databases.FindByName(databaseName);
Cube cube = database.Cubes.FindByName(cubeName);
foreach (MeasureGroup measureGroup in cube.MeasureGroups)
{
foreach (Partition partition in measureGroup.Partitions)
{
...
}
}
foreach (CubeDimension cubeDimension in cube.Dimensions)
{
Dimension dimension = cubeDimension.Dimension;
var dimName = dimension.Name;
...
}
Finding the names in advance for all the elements you need is probably the hard part (And keeping it all up-to-date).
Would it not be easier to fire all the queries at the cube and try to trap the "no such thing" response?
Related
Using Camunda as the tool for orchestration of the microservices. At later time, I find the process_instances_id generated necessary for continuing a particular process by using it in messageEventReceived(). Code as follows:
val processid = getProcessID(key1, key2)
val runtimeService = processengine.getRuntimeService
val subscription = runtimeService.createEventSubscriptionQuery
.eventType("message")
.eventName(eventname)
.processInstanceId(executionid)
.singleResult
runtimeService.messageEventReceived(subscription.getEventName, subscription.getExecutionId)
As of this moment the processid is saved and then retrieved from the database using the getProcessID(...) function when necessary. Is this proper?
Does camunda already have the list of process_ids in its own database? If so, how do I retrieve a particular process instance id just giving composite key(s)? Is that even possible?
It is the common way. You can also use the public api to get the process instance and his id via the process definition key.
See the following example from the documentation:
runtimeService.createProcessInstanceQuery()
.processDefinitionKey("invoice")
.list();
For your given example there is also a simpler way. It is possible to correlate the message via the runtime service.
See this example from the documenation:
runtimeService.createMessageCorrelation("messageName")
.processInstanceBusinessKey("AB-123")
.setVariable("payment_type", "creditCard")
.correlate();
You can use
runtimeService.createProcessInstanceQuery().list();
the query supports fluent criteria for filtering, for example on process_key, variables, businessKey ...
I am using TaxonomyManager gettree(path) method to get a particular tree hierarchy in my c# code but it is taking more than 3 min to get the result, due to this the website is taking long time to load. How to reduce the time to load the website, is there any other way i can use to get the hierarchy from Ektron.
We had this exact same issue and actually got on with Ektron support to help resolve it.
Now, whenever we work with taxonomies we cache them on the server-side to avoid the performance hit. Something like
string cacheKey = "Something unique for your situation";
TaxonomyData taxonomyData;
if (Ektron.Cms.Context.HttpContext.Cache[cacheKey] == null)
{
// Pull taxonomy data and store in cache.
Ektron.Cms.Context.HttpContext.Cache.Insert(cacheKey, taxonomyData);
}
else
{
taxonomyData = (TaxonomyData)Ektron.Cms.Context.HttpContext.Cache[cacheKey];
}
Since you already know how to pull the TaxonomyData I left that out. We don't store the taxonomy data, instead we store the object we create with the taxonomy data, so just cache whatever you need to and then you can avoid the performance hit 'most' of the time.
I don't remember where the ektron cache time is set, whether it's in the web.config or within the WorkArea. Ektron support said to use the Ektron cache, not sure how much of a difference it would make to use the regular cache instead.
I have a object Ob with several fields f1,..,fn (of different types).
Now a list of object is shown in a GridView and I need to implement the sorting method.
The real problem is:
how can I run
(from ob in Ob_list orderby ob.f1 ascending)
when the sorting field is represented by a string (i.e. "f1")?
Unfortunately I am not able to get it with the reflection (I am not able to do something like ob.GetType().GetField("f1"), this is not mapped into sql code).
I have several fields to possibly sort the rows, which is the best&fastest approach to this?
Thank you very much!
LINQ execution is deferred until you actually enumerate over the results or access the "count", etc. Because of this, you can build up your LINQ statement in stages.
The below code is done in C#, but I'm sure the equivalent is possible in VB.NET.
First setup your basic query:
var query = (from ob in Ob_list);
At this point, nothing has actually gone to the database due to deferred execution.
Next, conditionally add your order by components:
if (sortField == "f1")
{
query = query.OrderBy(o => o.f1);
}
else if (sortField == "f2")
{
query = query.OrderBy(o => o.f2);
}
else
{
//...
}
And finally, collect your results
foreach (var item in query)
{
// Process the item
}
I've found this question: How do I specify the Linq OrderBy argument dynamically?
I'm using Entity Framework, so the first answer did not solved my problem. The second one however, worked great!
Hope it helps!
I want to add property to existing document (using clues form http://ravendb.net/docs/client-api/partial-document-updates). But before adding want to check if that property already exists in my database.
Is any "special,proper ravendB way" to achieve that?
Or just load document and check if this property is null or not?
You can do this using a set based database update. You carry it out using JavaScript, which fortunately is similar enough to C# to make it a pretty painless process for anybody. Here's an example of an update I just ran.
Note: You have to be very careful doing this because errors in your script may have undesired results. For example, in my code CustomId contains something like '1234-1'. In my first iteration of writing the script, I had:
product.Order = parseInt(product.CustomId.split('-'));
Notice I forgot the indexer after split. The result? An error, right? Nope. Order had the value of 12341! It is supposed to be 1. So be careful and be sure to test it thoroughly.
Example:
Job has a Products property (a collection) and I'm adding the new Order property to existing Products.
ravenSession.Advanced.DocumentStore.DatabaseCommands.UpdateByIndex(
"Raven/DocumentsByEntityName",
new IndexQuery { Query = "Tag:Jobs" },
new ScriptedPatchRequest { Script =
#"
this.Products.Map(function(product) {
if(product.Order == undefined)
{
product.Order = parseInt(product.CustomId.split('-')[1]);
}
return product;
});"
}
);
I referenced these pages to build it:
set based ops
partial document updates (in particular the Map section)
I have an application using NHibernate that is already deployed and working properly, and I'm re-factoring the unit tests to use SQLite for improved performance, and to keep unit test data out of the "real" database.
I have a simple test that creates an Calendar entity, saves it, then tries to read it back and verifies that it's the same object. The write works, but the subsequent select to read it back returns 0 records. A Calendar has a GUID as a primary key, and I understand that requires an extra parameter on the SQLite connection string. This is my connection string:
data source=:memory:;Version=3;New=true;Pooling=true;Max Pool Size=1;BinaryGuid=False
Through the logged SQL statements coming from NHibernate, I see the inserts to write the entity and its dependencies, then the subsequent select statement. It all looks good, but nothing is selected. If I use a file database instead of an in-memory database, I can open up the table in Visual Studio's Server Explorer, and I see the correct data in the tables. If I write a query to try selecting the record, like so:
SELECT CalendarID, Name, Description
FROM dbo_Calendars
WHERE (CalendarID = 'a9cd9820-1694-4645-88d4-f682c5a6b9cc')
it also fails to select anything. I think it's an issue with GUID handling, but I'm flummoxed.
Update
Here's what the test case looks like:
[Test]
public void SaveAndLoadCalendar()
{
Guid calId;
DAOFactory factory = (DAOFactory)DAOFactory;
ISession s = factory.SessionManager.CurrentSession;
using (var tx = s.BeginTransaction())
{
Calendar cal = new Calendar("Test Calendar", CalendarType.Test);
cal.Active = true;
cal.Browsable = true;
s.Save(cal);
tx.Commit();
calId = cal.ID;
}
Logger.InfoFormat("Calendar ID is {0} ", calId);
s.Clear();
using (var tx2 = s.BeginTransaction())
{
Calendar cal = s.Get<Calendar>(calId);
Assert.IsNotNull(cal, "Could not retrieve saved calendar");
Assert.AreEqual("Test Calendar", cal.Name, "Saved calendar not equal to original calendar");
}
}
I would guess that the transaction handling could be the problem.
So maybe the transaction inserting the record is not yet committed and so the (different) transaction performing the select does not yet see the new data - so the select returns nothing.
I figured it out, and the problem isn't NHibernate or SQLite, it's me. Each Calendar has an associated Theme. In our production database, these are manually entered, and expected to exist in advance. Now that I'm using SQLite for testing, I'm starting with an empty database, and this reference data isn't pre-populated. NHibernate's Select statement to fetch the Calendar uses an inner join on the Themes table, and with nothing in that table, the select will return empty. D'oh.
After updating my test setup code to save the default theme, the test passes.