I need to use SMO to find out all the dependencies of a registered assembly (SQLCLR).
How can I do that?
Thanks, Nestor
Actually, here is a better answer:
static public List<Urn> GetDependencies(SqlAssembly assembly)
{
return GetDependencies(assembly.Parent.Parent, assembly.Urn);
}
static public List<Urn> GetDependencies(Server server, Urn obj)
{
Scripter scr = new Scripter(server);
DependencyTree tree = scr.DiscoverDependencies(new Urn[] { obj }, DependencyType.Parents);
DependencyWalker depwalker = new DependencyWalker();
DependencyCollection depcoll = depwalker.WalkDependencies(tree);
List<Urn> dependencies = new List<Urn>();
foreach (DependencyCollectionNode dep in depcoll) dependencies.Add(dep.Urn);
return dependencies;
}
I guess I can query it using TSQL:
select
a.name as 'assembly',
(select name from sys.assemblies where assembly_id = r.referenced_assembly_id) as 'referenced_assembly'
from sys.assemblies a left outer join sys.assembly_references r on (a.assembly_id=r.assembly_id)
where a.is_user_defined = 1
order by assembly
:-)
Related
I have a console program that moves Data between two different servers (DatabaseA and DatabaseB).
Database B is a Postgres-Server.
It calls a lot of stored procedures and other raw queries.
I use ExecuteSqlRaw a lot.
I also use NpsqlBulk.EfCore.
The program uses the same context instance for DatabaseB during the whole run it takes to finish.
Somehow i get locks on some of my tables on DatabaseB that never get released.
This happens always on my table mytable_fromdatabase_import.
The code run on that is the following:
protected override void AddIdsNew()
{
var toAdd = IdsNotInDatabaseB();
var newObjectsToAdd = GetByIds(toAdd).Select(Converter.ConvertAToB);
DatabaseBContext.Database.ExecuteSqlRaw("truncate mytable_fromdatabase_import; ");
var uploader = new NpgsqlBulkUploader(DatabaseBContext);
uploader.Insert(newObjectsToAdd); // inserts data into mytable_fromdatabase_import
DatabaseBContext.Database.ExecuteSqlRaw("call insert_myTable_from_importTable();");
}
After i run it the whole table is not accessable annymore and when i query the locks on the server i can see there is a process holding it.
How can i make sure this process always closes and releases its locks on tables?
I thought ef-core would do that automaticaly.
-----------Edit-----------
I just wanted to add that this is not a temporary problem during the run of the console. When i run this code and it is finished my table is still locked and nothing can access it. My understanding was that the ef-core context would release everything after it is disposed (if by error or by being finished)
The problem had nothing to do with ef core but with a wrong configured backupscript. The program is running now with no changes to it and it works fine
For concrete task you need right tools. Probably you have locks when retrieve Ids and also when trying to do not load already imported records. These steps are slow!
I would suggest to use linq2db (disclaimer, I'm co-author of this library)
Create two projects with models from different databases:
Source.Model.csproj - install linq2db.SQLServer
Destination.Model.csproj - install linq2db.PostgreSQL
Follow instructions in T4 templates how to generate model from two databases. It is easy and you can ask questions on linq2db`s github site.
I'll post helper class which I've used for transferring tables on my previous project. It additionally uses library CodeJam for mapping, but in your project, for sure, you can use Automapper.
public class DataImporter
{
private readonly DataConnection _source;
private readonly DataConnection _destination;
public DataImporter(DataConnection source, DataConnection destination)
{
_source = source;
_destination = destination;
}
private long ImportDataPrepared<TSource, TDest>(IOrderedQueryable<TSource> source, Expression<Func<TSource, TDest>> projection) where TDest : class
{
var destination = _destination.GetTable<TDest>();
var tableName = destination.TableName;
var sourceCount = source.Count();
if (sourceCount == 0)
return 0;
var currentCount = destination.Count();
if (currentCount > sourceCount)
throw new Exception($"'{tableName}' what happened here?.");
if (currentCount >= sourceCount)
return 0;
IQueryable<TSource> sourceQuery = source;
if (currentCount > 0)
sourceQuery = sourceQuery.Skip(currentCount);
var projected = sourceQuery.Select(projection);
var copied =
_destination.BulkCopy(
new BulkCopyOptions
{
BulkCopyType = BulkCopyType.MultipleRows,
RowsCopiedCallback = (obj) => RowsCopiedCallback(obj, currentCount, sourceCount, tableName)
}, projected);
return copied.RowsCopied;
}
private void RowsCopiedCallback(BulkCopyRowsCopied obj, int currentRows, int totalRows, string tableName)
{
var percent = (currentRows + obj.RowsCopied) / (double)totalRows * 100;
Console.WriteLine($"Copied {percent:N2}% \tto {tableName}");
}
public class ImporterHelper<TSource>
{
private readonly DataImporter _improrter;
private readonly IOrderedQueryable<TSource> _sourceQuery;
public ImporterHelper(DataImporter improrter, IOrderedQueryable<TSource> sourceQuery)
{
_improrter = improrter;
_sourceQuery = sourceQuery;
}
public long To<TDest>() where TDest : class
{
var mapperBuilder = new MapperBuilder<TSource, TDest>();
return _improrter.ImportDataPrepared(_sourceQuery, mapperBuilder.GetMapper().GetMapperExpressionEx());
}
public long To<TDest>(Expression<Func<TSource, TDest>> projection) where TDest : class
{
return _improrter.ImportDataPrepared(_sourceQuery, projection);
}
}
public ImporterHelper<TSource> ImprortData<TSource>(IOrderedQueryable<TSource> source)
{
return new ImporterHelper<TSource>(this, source);
}
}
So begin transferring. Note that I have used OrderBy/ThenBy to specify Id order to do not import already transferred records - important order fields should be Unique Key combination. So this sample is reentrant and can be re-run again when connection is lost.
var sourceBuilder = new LinqToDbConnectionOptionsBuilder();
sourceBuilder.UseSqlServer(SourceConnectionString);
var destinationBuilder = new LinqToDbConnectionOptionsBuilder();
destinationBuilder.UsePostgreSQL(DestinationConnectionString);
using (var source = new DataConnection(sourceBuilder.Build()))
using (var destination = new DataConnection(destinationBuilder.Build()))
{
var dataImporter = new DataImporter(source, destination);
dataImporter.ImprortData(source.GetTable<Source.Model.FirstTable>()
.OrderBy(e => e.Id1)
.ThenBy(e => e.Id2))
.To<Dest.Model.FirstTable>();
dataImporter.ImprortData(source.GetTable<Source.Model.SecondTable>().OrderBy(e => e.Id))
.To<Dest.Model.SecondTable>();
}
For sure boring part with OrderBy can be generated automatically, but this will explode this already not a short answer.
Also play with BulkCopyOptions. Native Npgsql COPY may fail and Multi-Line variant should be used.
I'm trying to use repository pattern for my vsto project.
How do I use a repository pattern to execute a stored procedure? I'm using Entity Framework. Any link for code sample would really useful
To your generic repository add
public IEnumerable<T> ExecWithStoreProcedure(string query, params object[] parameters)
{
return _context.Database.SqlQuery<T>(query, parameters);
}
And then you can call it with any unitofwork/repository like
IEnumerable<Products> products =
_unitOfWork.ProductRepository.ExecWithStoreProcedure(
"spGetProducts #bigCategoryId",
new SqlParameter("bigCategoryId", SqlDbType.BigInt) { Value = categoryId }
);
A non generic solution in your repository would be:
private int ExecWithStoreProcedure(string query, params object[] parameters)
{
return _context.Database.ExecuteSqlCommand("EXEC " + query, parameters);
}
And then a few typical examples of use:
var param = new SqlParameter("SomethingToCheck", SqlDbType.NVarChar) { Value = shortCode };
var result = ExecWithStoreProcedure("mySchema.myStoredProc #SomethingToCheck", param);
with multiple parameters:
var param1 = new SqlParameter("SomeCode", SqlDbType.VarChar) { Value = shortCode };
var param2 = new SqlParameter("User", SqlDbType.VarChar) { Value = userName };
var result = ExecWithStoreProcedure("mySchema.myStoredProc #SomeCode, #User", param1, param2 );
this link guided me. [Link]
But when you execute stored procedure you have to put "exec" informant of SP name
Eg: if sp is "sp_aa"
string should be "exec sp_aa"
I am somewhat new to expression trees and I just don't quite understand some things.
What I need to do is send in a list of values and select the columns for an entity from those values. So I would make a call something like this:
DATASTORE<Contact> dst = new DATASTORE<Contact>();//DATASTORE is implemented below.
List<string> lColumns = new List<string>() { "ID", "NAME" };//List of columns
dst.SelectColumns(lColumns);//Selection Command
I want that to be translated into code like this (Contact is an entity using the EF4):
Contact.Select(i => new Contact { ID = i.ID, NAME = i.NAME });
So let's say I have the following code:
public Class<t> DATASTORE where t : EntityObject
{
public Expression<Func<t, t>> SelectColumns(List<string> columns)
{
ParameterExpression i = Expression.Parameter(typeof(t), "i");
List<MemberBinding> bindings = new List<MemberBinding>();
foreach (PropertyInfo propinfo in typeof(t).GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (columns.Contains(propinfo.Name))
{
MemberBinding binding = Expression.Bind(propinfo, Expression.Property(i, propinfo.Name));
bindings.Add(binding);
}
}
Expression expMemberInit = Expression.MemberInit(Expression.New(typeof(t)), bindings);
return Expression.Lambda<Func<t, t>>(expMemberInit, i);
}
When I ran the above code I got the following error:
The entity or complex type 'Contact' cannot be constructed in a LINQ to Entities query.
I looked at the body of the query and it emitted the following code:
{i => new Contact() {ID = i.ID, NAME = i.NAME}}
I am pretty sure that I should be able to construct the a new entity because I wrote this line explicitly as a test to see if this could be done:
.Select(i => new Contact{ ID = i.ID, NAME = i.NAME })
This worked, but I need to construct the select dynamically.
I tried decompiling a straight query(first time I have looked at the low level code) and I can't quite translate it. The high level code that I entered is:
Expression<Func<Contact, Contact>> expression = z =>
new Contact { ID = z.ID, NAME = z.NAME };
Changing the framework used in the decompiler I get this code:
ParameterExpression expression2;
Expression<Func<Contact, Contact>> expression =
Expression.Lambda<Func<Contact, Contact>>
(Expression.MemberInit(Expression.New((ConstructorInfo) methodof(Contact..ctor),
new Expression[0]), new MemberBinding[] { Expression.Bind((MethodInfo)
methodof(Contact.set_ID), Expression.Property(expression2 = Expression.Parameter(typeof(Contact), "z"), (MethodInfo)
methodof(Contact.get_ID))), Expression.Bind((MethodInfo)
methodof(Contact.set_NAME), Expression.Property(expression2, (MethodInfo)
methodof(Contact.get_NAME))) }), new ParameterExpression[] { expression2
});
I have looked several places to try and understand this but I haven't quite gotten it yet. Can anyone help?
These are some places that I have looked:
msdn blog -- This is exactly what I want to do but my decopiled code soes not have Expression.Call.
msdn MemberInit
msdn Expression Property
stackoverflow EF only get specific columns -- This is close but this seems like it is doing the same thing as if i just use a select off of a query.
stackoverflow lambda expressions to be used in select query -- The answer here is exactly what I want to do, I just don't understand how to translate the decompiled code to
C#.
When I did it last time I projected result to not mapped class (not entity) and it worked, everything else was the same as in your code. Are you sure that not dynamic query like .Select(i => new Contact{ ID = i.ID, NAME = i.NAME }) works?
I need to change the storage schema of the entities on runtime.
I've followed a wonderful post, available here:
http://blogs.microsoft.co.il/blogs/idof/archive/2008/08/22/change-entity-framework-storage-db-schema-in-runtime.aspx?CommentPosted=true#commentmessage
This works perfectly, but only for queries, not for modifications.
Any idea why?
Well, I was looking for this piece of code all around the Internet. In the end I had to do it myself. It's based on Brandon Haynes adapter, but this function is all you need to change the schema on runtime - and you don't need to replace the autogenerated context constructors.
public static EntityConnection Create(
string schema, string connString, string model)
{
XmlReader[] conceptualReader = new XmlReader[]
{
XmlReader.Create(
Assembly
.GetExecutingAssembly()
.GetManifestResourceStream(model + ".csdl")
)
};
XmlReader[] mappingReader = new XmlReader[]
{
XmlReader.Create(
Assembly
.GetExecutingAssembly()
.GetManifestResourceStream(model + ".msl")
)
};
var storageReader = XmlReader.Create(
Assembly
.GetExecutingAssembly()
.GetManifestResourceStream(model + ".ssdl")
);
XNamespace storageNS = "http://schemas.microsoft.com/ado/2009/02/edm/ssdl";
var storageXml = XElement.Load(storageReader);
foreach (var entitySet in storageXml.Descendants(storageNS + "EntitySet"))
{
var schemaAttribute = entitySet.Attributes("Schema").FirstOrDefault();
if (schemaAttribute != null)
{
schemaAttribute.SetValue(schema);
}
}
storageXml.CreateReader();
StoreItemCollection storageCollection =
new StoreItemCollection(
new XmlReader[] { storageXml.CreateReader() }
);
EdmItemCollection conceptualCollection = new EdmItemCollection(conceptualReader);
StorageMappingItemCollection mappingCollection =
new StorageMappingItemCollection(
conceptualCollection, storageCollection, mappingReader
);
var workspace = new MetadataWorkspace();
workspace.RegisterItemCollection(conceptualCollection);
workspace.RegisterItemCollection(storageCollection);
workspace.RegisterItemCollection(mappingCollection);
var connectionData = new EntityConnectionStringBuilder(connString);
var connection = DbProviderFactories
.GetFactory(connectionData.Provider)
.CreateConnection();
connection.ConnectionString = connectionData.ProviderConnectionString;
return new EntityConnection(workspace, connection);
}
The resulting EntityConnection should be passed as a parameter when instantiating the context. You can modify it, so all ssdl models are modified by this function, not only the specified one.
I've managed to resolve this issue by using a brilliant library, located in CodePlex (courtesy of Brandon Haynes), named "Entity Framework Runtime Model Adapter", available here:
http://efmodeladapter.codeplex.com/
I've tweaked it a bit, to fit our needs and without the need of replacing the designer code at all.
So, I'm good.
Thanks anyways, and especially to Brandon, amazing job!
I need import data from postgres database. It by default use schema "public". So I use Entity Framework CTP 4 "Code first". It by default use schema "dbo". To change it in runtime I use:
public class PublicSchemaContext : DbContext
{
protected override void OnModelCreating(System.Data.Entity.ModelConfiguration.ModelBuilder builder)
{
builder.Entity<series_categories>().MapSingleType().ToTable("[public].[series_categories]");
}
public DbSet<series_categories> series_categories { get; set; }
}
It work for select, insert, update and delete data. So next test in pass:
[Test]
public void AccessToPublicSchema()
{
// Select
var db = new PublicSchemaContext();
var list = db.series_categories.ToList();
Assert.Greater(list.Count, 0);
Assert.IsNotNull(list.First().series_category);
// Delete
foreach (var item in db.series_categories.Where(c => c.series_category == "Test"))
db.series_categories.Remove(item);
db.SaveChanges();
// Insert
db.series_categories.Add(new series_categories { series_category = "Test", series_metacategory_id = 1 });
db.SaveChanges();
// Update
var test = db.series_categories.Single(c => c.series_category == "Test");
test.series_category = "Test2";
db.SaveChanges();
// Delete
foreach (var item in db.series_categories.Where(c => c.series_category == "Test2"))
db.series_categories.Remove(item);
db.SaveChanges();
}
Not an answer per se but a followup on Jan Matousek's Create[EntityConnection] method showing how to use from a DbContext. Note DB is the DbContext type passed to the generic repository.
public TxRepository(bool pUseTracking, string pServer, string pDatabase, string pSchema="dbo")
{
// make our own EF database connection string using server and database names
string lConnectionString = BuildEFConnectionString(pServer, pDatabase);
// do nothing special for dbo as that is the default
if (pSchema == "dbo")
{
// supply dbcontext with our connection string
mDbContext = Activator.CreateInstance(typeof(DB), lConnectionString) as DB;
}
else // change the schema in the edmx file before we use it!
{
// Create an EntityConnection and use that to create an ObjectContext,
// then that to create a DbContext with a different default schema from that specified for the edmx file.
// This allows us to have parallel tables in the database that we can make available using either schema or synonym renames.
var lEntityConnection = CreateEntityConnection(pSchema, lConnectionString, "TxData");
// create regular ObjectContext
ObjectContext lObjectContext = new ObjectContext(lEntityConnection);
// create a DbContext from an existing ObjectContext
mDbContext = Activator.CreateInstance(typeof(DB), lObjectContext, true) as DB;
}
// finish EF setup
SetupAndOpen(pUseTracking);
}
I was able to convert the solution from Jan Matousek to work in vb.net 2013 with entity framework 6. I will also try to explain how to use the code in vb.net.
We have a JD Edwards Database which uses different Schema's for each environment (TESTDTA, CRPDTA, PRODDTA). This makes switching between environments cumbersome as you have to manually modify the .edmx file if you want to change environments.
First step is to create a partial class that allows you to pass a value to the constructor of your entities, by default it uses the values from your config file.
Partial Public Class JDE_Entities
Public Sub New(ByVal myObjectContext As ObjectContext)
MyBase.New(myObjectContext, True)
End Sub
End Class
Next create the function that will modify your store schema .ssdl file in memory.
Public Function CreateObjectContext(ByVal schema As String, ByVal connString As String, ByVal model As String) As ObjectContext
Dim myEntityConnection As EntityConnection = Nothing
Try
Dim conceptualReader As XmlReader = XmlReader.Create(Me.GetType().Assembly.GetManifestResourceStream(model + ".csdl"))
Dim mappingReader As XmlReader = XmlReader.Create(Me.GetType().Assembly.GetManifestResourceStream(model + ".msl"))
Dim storageReader As XmlReader = XmlReader.Create(Me.GetType().Assembly.GetManifestResourceStream(model + ".ssdl"))
Dim storageNS As XNamespace = "http://schemas.microsoft.com/ado/2009/11/edm/ssdl"
Dim storageXml = XDocument.Load(storageReader)
Dim conceptualXml = XDocument.Load(conceptualReader)
Dim mappingXml = XDocument.Load(mappingReader)
For Each myItem As XElement In storageXml.Descendants(storageNS + "EntitySet")
Dim schemaAttribute = myItem.Attributes("Schema").FirstOrDefault
If schemaAttribute IsNot Nothing Then
schemaAttribute.SetValue(schema)
End If
Next
storageXml.Save("storage.ssdl")
conceptualXml.Save("storage.csdl")
mappingXml.Save("storage.msl")
Dim storageCollection As StoreItemCollection = New StoreItemCollection("storage.ssdl")
Dim conceptualCollection As EdmItemCollection = New EdmItemCollection("storage.csdl")
Dim mappingCollection As StorageMappingItemCollection = New StorageMappingItemCollection(conceptualCollection, storageCollection, "storage.msl")
Dim workspace = New MetadataWorkspace()
workspace.RegisterItemCollection(conceptualCollection)
workspace.RegisterItemCollection(storageCollection)
workspace.RegisterItemCollection(mappingCollection)
Dim connectionData = New EntityConnectionStringBuilder(connString)
Dim connection = DbProviderFactories.GetFactory(connectionData.Provider).CreateConnection()
connection.ConnectionString = connectionData.ProviderConnectionString
myEntityConnection = New EntityConnection(workspace, connection)
Return New ObjectContext(myEntityConnection)
Catch ex As Exception
End Try
End Function
Make sure that the storageNS namespace hardcoded value matches the one used in your code, you can view this by debugging the code and examining the storageXML variable to see what was actually used.
Now you can pass a new schema name, and different database connection info at runtime when you create your entities. No more manual .edmx changes required.
Using Context As New JDE_Entities(CreateObjectContext("NewSchemaNameHere", ConnectionString_EntityFramework("ServerName", "DatabaseName", "UserName", "Password"), "JDE_Model"))
Dim myWO = From a In Context.F4801 Where a.WADOCO = 400100
If myWO IsNot Nothing Then
For Each r In myWO
Me.Label1.Text = r.WADL01
Next
End If
End Using
These were the .net libraries used:
Imports System.Data.Entity.Core.EntityClient
Imports System.Xml
Imports System.Data.Common
Imports System.Data.Entity.Core.Metadata.Edm
Imports System.Reflection
Imports System.Data.Entity.Core.Mapping
Imports System.Data.Entity.Core.Objects
Imports System.Data.Linq
Imports System.Xml.Linq
Hope that helps anyone out there with the same issues.
I had a lot of problems getting this to work when using EF6 with an OData Data Service, so I had to find an alternate solution. In my case, I didn't really need to do it on the fly. I could get away with changing the schema when deploying to some test environments, and in the installer.
Use Mono.Cecil to rewrite the embedded .ssdl resources straight in the DLLs. This works just fine in my case.
Here is a simplified example of how you can do this:
var filename = "/path/to/some.dll"
var replacement = "Schema=\"new_schema\"";
var module = ModuleDefinition.ReadModule(filename);
var ssdlResources = module.Resources.Where(x => x.Name.EndsWith(".ssdl"));
foreach (var resource in ssdlResources)
{
var item = (EmbeddedResource)resource;
string rewritten;
using (var reader = new StreamReader(item.GetResourceStream()))
{
var text = reader.ReadToEnd();
rewritten = Regex.Replace(text, "Schema=\"old_schema\"", replacement);
}
var bytes = Encoding.UTF8.GetBytes(rewritten);
var newResource = new EmbeddedResource(item.Name, item.Attributes, bytes);
module.Resources.Remove(item);
module.Resources.Add(newResource);
}
I would like to display the version number of a custom Eclipse feature I am developing in the title bar of its perspective. Is there a way to obtain the version number from the runtime plugin and/or workbench?
Something like:
Platform.getBundle("my.feature.id").getHeaders().get("Bundle-Version");
should do the trick.
Note (from this thread) that it can not be used anywhere within the plugin itself:
this.getBundle() is not valid until AFTER super.start(BundleContext) has been called on your plugin.
So if you are using this.getBundle() within your constructor or within your start(BundleContext) before calling super.start() then it will return null.
If that fails, you have here a more complete "version":
public static String getPlatformVersion() {
String version = null;
try {
Dictionary dictionary =
org.eclipse.ui.internal.WorkbenchPlugin.getDefault().getBundle().getHeaders();
version = (String) dictionary.get("Bundle-Version"); //$NON-NLS-1$
} catch (NoClassDefFoundError e) {
version = getProductVersion();
}
return version;
}
public static String getProductVersion() {
String version = null;
try {
// this approach fails in "Rational Application Developer 6.0.1"
IProduct product = Platform.getProduct();
String aboutText = product.getProperty("aboutText"); //$NON-NLS-1$
String pattern = "Version: (.*)\n"; //$NON-NLS-1$
Pattern p = Pattern.compile(pattern);
Matcher m = p.matcher(aboutText);
boolean found = m.find();
if (found) {
version = m.group(1);
}
} catch (Exception e) {
}
return version;
}
I use the first option:
protected void fillStatusLine(IStatusLineManager statusLine) {
statusItem = new StatusLineContributionItem("LastModificationDate"); //$NON-NLS-1$
statusItem.setText("Ultima Actualizaci\u00f3n: "); //$NON-NLS-1$
statusLine.add(statusItem);
Dictionary<String, String> directory = Platform.getBundle("ar.com.cse.balanza.core").getHeaders();
String version = directory.get("Bundle-Version");
statusItem = new StatusLineContributionItem("CopyRight"); //$NON-NLS-1$
statusItem.setText(Messages.AppActionBar_18);
statusLine.add(statusItem);
}
As #zvikico says above, the accepted answer does not work for Features, only Plug-ins (OSGi Bundles, which Features are not). The way to get info about installed features is via org.eclipse.core.runtime.Platform.getBundleGroupProviders() as described here.
A version of what VonC provided to retrieve the primary Eclipse version number, but one that doesn't reference internal classes (which you should avoid doing):
Platform.getBundle(PlatformUI.PLUGIN_ID).getHeaders().get("Bundle-Version");