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Do not store mapping field in Configuration #3398

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merged 16 commits into from
Aug 15, 2023
Merged

Do not store mapping field in Configuration #3398

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1c40dde
Do not store mapping in Configuration
hazzik Aug 6, 2023
ee07fe2
Create settings before mappings
hazzik Aug 6, 2023
5329091
Throw invalid operation exception if dialect is not ready yet
hazzik Aug 6, 2023
e17be07
Make DeepSource happy
hazzik Aug 6, 2023
92ad468
Remove reflection from tests
hazzik Aug 6, 2023
ddbb057
Refactoring
hazzik Aug 7, 2023
8a625cb
Merge branch 'master' of https://github.com/nhibernate/nhibernate-cor…
hazzik Aug 7, 2023
bfb30a3
Obsolete BuildMapping method
hazzik Aug 7, 2023
02052af
Oops
hazzik Aug 7, 2023
6390400
Remove validation on serialization
hazzik Aug 7, 2023
9f81860
Code review changes
hazzik Aug 14, 2023
92b008a
Merge branch 'master' of https://github.com/nhibernate/nhibernate-cor…
hazzik Aug 14, 2023
13cf540
Remove whitespace churn
hazzik Aug 14, 2023
16a9d50
Encapsulate StaticDialectMappingWrapper instantiation
hazzik Aug 14, 2023
08e4354
Improve obsolescence message
hazzik Aug 14, 2023
b632e60
Merge branch 'master' into refactor-cfg
hazzik Aug 15, 2023
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11 changes: 1 addition & 10 deletions src/NHibernate.Test/DialectTest/MsSql2008DialectFixture.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -148,16 +148,7 @@ public void ScaleTypes()
Assert.That(dialect.GetTypeName(SqlTypeFactory.GetTime(max + 1)), Is.EqualTo("time").IgnoreCase, "Over max time");
}

private static readonly FieldInfo _mappingField =
typeof(Configuration).GetField("mapping", BindingFlags.Instance | BindingFlags.NonPublic);

private static IMapping GetMapping(Configuration cfg)
{
Assert.That(_mappingField, Is.Not.Null, "Unable to find field mapping");
var mapping = _mappingField.GetValue(cfg) as IMapping;
Assert.That(mapping, Is.Not.Null, "Unable to find mapping object");
return mapping;
}
private static IMapping GetMapping(Configuration cfg) => (IMapping) cfg.BuildSessionFactory();
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The true equivalent for the original code in the new way would be GetMapping(Configuration cfg) => cfg.BuildMapping(), but Dialect would throw an InvalidOperationException. However, in this case it does not matter and we can use fully resolved session factory instead.

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Now new public "BuildMapping" can be used.

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I was thinking about it and don't like it. cfg.BuildMapping just should not exist as it provides an incomplete version of mapping, that can create a lot of problems.

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@bahusoid bahusoid Aug 15, 2023 •
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nit: I don't understand your concern. In my understanding IMapping was specifically designed to be safely used in "uncompiled" state. See interface description:

nhibernate-core/src/NHibernate/Engine/IMapping.cs

Lines 6 to 7 in a0bc61f

/// Defines operations common to "compiled" mappings (ie. <c>SessionFactory</c>) and
/// "uncompiled" mappings (ie <c>Configuration</c> that are used by implementors of <c>IType</c>

So as long you use interface methods and don't do some funny castings you should be safe.

You agreed to keep method public - so it would be good to have it in tests too.

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I don't think the IMapping was designed. It was probably appeared incidentally from some other bad design decision. Problem with the interface that it is not clear when it is safe to use compiled or raw mappings. For example, SingleTableEntityPersister accepts both IMapping and ISessionFactoryImplementor. Can it use only ISessionFactoryImplementor?

nhibernate-core/src/NHibernate/Persister/Entity/SingleTableEntityPersister.cs

Lines 79 to 81 in 3e353c1

public SingleTableEntityPersister(PersistentClass persistentClass, ICacheConcurrencyStrategy cache,
ISessionFactoryImplementor factory, IMapping mapping)
: base(persistentClass, cache, factory)

This is really not clear.

Also, Hibernate has removed this interface and redesigned the mapping compilation.


private static void AssertSqlType(IType type, SqlType sqlType, IMapping mapping)
{
Expand Down
79 changes: 31 additions & 48 deletions src/NHibernate/Cfg/Configuration.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -98,7 +98,6 @@ public Configuration(SerializationInfo info, StreamingContext context)
FilterDefinitions = GetSerialedObject<IDictionary<string, FilterDefinition>>(info, "filterDefinitions");
Imports = GetSerialedObject<IDictionary<string, string>>(info, "imports");
interceptor = GetSerialedObject<IInterceptor>(info, "interceptor");
mapping = GetSerialedObject<IMapping>(info, "mapping");
NamedQueries = GetSerialedObject<IDictionary<string, NamedQueryDefinition>>(info, "namedQueries");
NamedSQLQueries = GetSerialedObject<IDictionary<string, NamedSQLQueryDefinition>>(info, "namedSqlQueries");
namingStrategy = GetSerialedObject<INamingStrategy>(info, "namingStrategy");
Expand All @@ -124,7 +123,7 @@ public void GetObjectData(SerializationInfo info, StreamingContext context)
{
ConfigureProxyFactoryFactory();
SecondPassCompile();
Validate();
Validate(BuildMapping());
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info.AddValue("entityNotFoundDelegate", EntityNotFoundDelegate);

Expand All @@ -139,7 +138,6 @@ public void GetObjectData(SerializationInfo info, StreamingContext context)
info.AddValue("filterDefinitions", FilterDefinitions);
info.AddValue("imports", Imports);
info.AddValue("interceptor", interceptor);
info.AddValue("mapping", mapping);
info.AddValue("namedQueries", NamedQueries);
info.AddValue("namedSqlQueries", NamedSQLQueries);
info.AddValue("namingStrategy", namingStrategy);
Expand Down Expand Up @@ -238,18 +236,18 @@ public bool HasNonIdentifierPropertyNamedId(string className)
}

public Dialect.Dialect Dialect =>
NHibernate.Dialect.Dialect.GetDialect(configuration.Properties);
throw new InvalidOperationException("The dialect is not ready at this stage of the configuration.");
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}

[Serializable]
private class StaticDialectMappingWrapper : IMapping
{
private readonly IMapping _mapping;

public StaticDialectMappingWrapper(IMapping mapping)
public StaticDialectMappingWrapper(IMapping mapping, Dialect.Dialect dialect)
{
_mapping = mapping;
Dialect = mapping.Dialect;
Dialect = dialect;
}

public IType GetIdentifierType(string className)
Expand All @@ -275,20 +273,12 @@ public bool HasNonIdentifierPropertyNamedId(string className)
public Dialect.Dialect Dialect { get; }
}

private IMapping mapping;

protected Configuration(SettingsFactory settingsFactory)
{
InitBlock();
this.settingsFactory = settingsFactory;
Reset();
}

private void InitBlock()
{
mapping = BuildMapping();
}

public virtual IMapping BuildMapping()
{
return new Mapping(this);
Expand Down Expand Up @@ -548,9 +538,8 @@ private void AddValidatedDocument(NamedXmlDocument doc)
public void AddDeserializedMapping(HbmMapping mappingDocument, string documentFileName)
{
if (mappingDocument == null)
{
throw new ArgumentNullException("mappingDocument");
}
throw new ArgumentNullException(nameof(mappingDocument));

try
{
var dialect = new Lazy<Dialect.Dialect>(() => Dialect.Dialect.GetDialect(properties));
Expand Down Expand Up @@ -745,9 +734,8 @@ public Configuration AddResource(string path, Assembly assembly)
public Configuration AddResources(IEnumerable<string> paths, Assembly assembly)
{
if (paths == null)
{
throw new ArgumentNullException("paths");
}
throw new ArgumentNullException(nameof(paths));

foreach (var path in paths)
{
AddResource(path, assembly);
Expand Down Expand Up @@ -934,6 +922,9 @@ public static bool IncludeAction(SchemaAction actionsSource, SchemaAction includ
/// <param name="dialect"></param>
public string[] GenerateSchemaCreationScript(Dialect.Dialect dialect)
{
var m = BuildMapping();
var mapping = new StaticDialectMappingWrapper(m, dialect);

SecondPassCompile();

var defaultCatalog = GetQuotedDefaultCatalog(dialect);
Expand Down Expand Up @@ -1001,11 +992,11 @@ public string[] GenerateSchemaCreationScript(Dialect.Dialect dialect)
return script.ToArray();
}

private void Validate()
private void Validate(IMapping mapping)
{
ValidateEntities();
ValidateEntities(mapping);

ValidateCollections();
ValidateCollections(mapping);

ValidateFilterDefs();
}
Expand Down Expand Up @@ -1059,15 +1050,15 @@ private void ValidateFilterDefs()
}
}

private void ValidateCollections()
private void ValidateCollections(IMapping mapping)
{
foreach (var col in collections.Values)
{
col.Validate(mapping);
}
}

private void ValidateEntities()
private void ValidateEntities(IMapping mapping)
{
bool validateProxy = PropertiesHelper.GetBoolean(Environment.UseProxyValidator, properties, true);
HashSet<string> allProxyErrors = null;
Expand Down Expand Up @@ -1281,8 +1272,7 @@ protected virtual void ConfigureProxyFactoryFactory()
//http://nhibernate.jira.com/browse/NH-975

var ipff = Environment.BytecodeProvider as IInjectableProxyFactoryFactory;
string pffClassName;
properties.TryGetValue(Environment.ProxyFactoryFactoryClass, out pffClassName);
properties.TryGetValue(Environment.ProxyFactoryFactoryClass, out var pffClassName);
if (ipff != null && !string.IsNullOrEmpty(pffClassName))
{
ipff.SetProxyFactoryFactory(pffClassName);
Expand All @@ -1299,33 +1289,22 @@ protected virtual void ConfigureProxyFactoryFactory()
/// <returns>An <see cref="ISessionFactory" /> instance.</returns>
public ISessionFactory BuildSessionFactory()
{
var dynamicDialectMapping = mapping;
// Use a mapping which does store the dialect instead of instantiating a new one
// at each access. The dialect does not change while building a session factory.
// It furthermore allows some hack on NHibernate.Spatial side to go on working,
// See nhibernate/NHibernate.Spatial#104
mapping = new StaticDialectMappingWrapper(mapping);
try
{
ConfigureProxyFactoryFactory();
SecondPassCompile();
Validate();
Environment.VerifyProperties(properties);
Settings settings = BuildSettings();
var m = BuildMapping();
var settings = BuildSettings();
var mapping = new StaticDialectMappingWrapper(m, settings.Dialect);
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ConfigureProxyFactoryFactory();
SecondPassCompile();
Validate(mapping);
Environment.VerifyProperties(properties);

// Ok, don't need schemas anymore, so free them
Schemas = null;
// Ok, don't need schemas anymore, so free them
Schemas = null;

return new SessionFactoryImpl(
this,
mapping,
settings,
GetInitializedEventListeners());
}
finally
{
mapping = dynamicDialectMapping;
}
return new SessionFactoryImpl(this, mapping, settings, GetInitializedEventListeners());
}

/// <summary>
Expand Down Expand Up @@ -2358,6 +2337,8 @@ private static T[] AppendListeners<T>(T[] existing, T[] listenersToAdd)
/// <seealso cref="NHibernate.Tool.hbm2ddl.SchemaUpdate"/>
public string[] GenerateSchemaUpdateScript(Dialect.Dialect dialect, IDatabaseMetadata databaseMetadata)
{
var m = BuildMapping();
var mapping = new StaticDialectMappingWrapper(m, dialect);
SecondPassCompile();

var defaultCatalog = GetQuotedDefaultCatalog(dialect);
Expand Down Expand Up @@ -2438,6 +2419,8 @@ public string[] GenerateSchemaUpdateScript(Dialect.Dialect dialect, IDatabaseMet

public void ValidateSchema(Dialect.Dialect dialect, IDatabaseMetadata databaseMetadata)
{
var m = BuildMapping();
var mapping = new StaticDialectMappingWrapper(m, dialect);
SecondPassCompile();

var defaultCatalog = GetQuotedDefaultCatalog(dialect);
Expand Down
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