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Spring.NET - object reference not set to object instance

I am new to .NET. I've used Spring Framework and Hibernate before in Java, but this is my first in .NET. For developing my application, I am using Spring.Northwind solution as an example.

Sleep mode display:

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
    <class name="EMSApplication.Domain.Employee, EMSApplication.Domain" table="ems_Employees" proxy="EMSApplication.Domain.IEmployee, EMSApplication.Domain" lazy="true">
        <id name="Id" type="System.Int32">
        <column name="Id" not-null="true"/>
        <generator class="native"/>
        </id>
        <property name="Username" type="System.String">
        <column name="Username" not-null="true"/>
        </property>
        <property name="Firstname" type="System.String">
        <column name="Firstname" not-null="true"/>
        </property>     
    </class>    
</hibernate-mapping>

As you can see, the Employee class only has three fields. It implements IEmployee, which consists of defining the get and set methods of these fields (if you want to see these classes I can provide).

Now I have a Web.config. I installed Spring as a sectionGroup and defined it as:

<configSections>
    <sectionGroup name="spring">
    <section name="context" type="Spring.Context.Support.WebContextHandler, Spring.Web"/>
    <section name="parsers" type="Spring.Context.Support.NamespaceParsersSectionHandler, Spring.Core"/>
    </sectionGroup>
    <section name="databaseSettings" type="System.Configuration.NameValueSectionHandler"/>
</configSections>
<spring>
    <parsers/>
    <context>
    <resource uri="~/Web.xml"/>
    </context>
</spring>
<databaseSettings>
    <add key="db.datasource" value="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\JYM.mdf;Integrated Security=True;User Instance=True"/>
</databaseSettings>

I also added a key Spring.Data.NHibernate.Support.OpenSessionInViewModule.SessionFactoryObjectName

to appsettings:

<appSettings>
    <add key="Spring.Data.NHibernate.Support.OpenSessionInViewModule.SessionFactoryObjectName" value="NHibernateSessionFactory"/>
</appSettings>

httpModules system.web has the following entries:

<httpModules>
    <add name="Spring" type="Spring.Context.Support.WebSupportModule, Spring.Web"/>
    <add name="OpenSessionInView" type="Spring.Data.NHibernate.Support.OpenSessionInViewModule, Spring.Data.NHibernate32"/>
</httpModules>

Finally, the Spring Web.xml resource has the following entities:

<object type="Spring.Objects.Factory.Config.PropertyPlaceholderConfigurer, Spring.Core">
    <property name="ConfigSections" value="databaseSettings"/>
</object>

<db:provider id="DbProvider" provider="System.Data.SqlClient" connectionString="Data Source=|DataDirectory|\JYM.mdf"/>

<object id="NHibernateSessionFactory" type="Spring.Data.NHibernate.LocalSessionFactoryObject, Spring.Data.NHibernate32">
    <property name="DbProvider" ref="DbProvider"/>
    <property name="MappingResources">
    <list>
        <value>assembly://EMSApplication/Domain/EMSApplication.hbm.xml</value>
    </list>
    </property>
    <property name="HibernateProperties">
    <dictionary>
        <entry key="hibernate.connection.provider" value="NHibernate.Connection.DriverConnectionProvider"/>
        <entry key="dialect" value="NHibernate.Dialect.MsSql2008Dialect"/>
        <entry key="connection.driver_class" value="NHibernate.Driver.SqlClientDriver"/>
        <entry key="proxyfactory.factory_class" value="NHibernate.Bytecode.DefaultProxyFactoryFactory, NHibernate"/>
        <entry key="show_sql" value="true"/>
        <entry key="hbm2ddl.auto" value="update"/>
        <entry key="cache.use_query_cache" value="true"/>
    </dictionary>
    </property>

    <property name="ExposeTransactionAwareSessionFactory" value="true" />
</object>

<object id="transactionManager" type="Spring.Data.NHibernate.HibernateTransactionManager, Spring.Data.NHibernate32">
    <property name="DbProvider" ref="DbProvider"/>
    <property name="SessionFactory" ref="NHibernateSessionFactory"/>
</object>

<object type="Spring.Dao.Attributes.PersistenceExceptionTranslationPostProcessor, Spring.Data"/>

<object id="EmployeeDao" type="EMSApplication.NHibernate.HibernateEmployeeDao">
    <property name="SessionFactory" ref="NHibernateSessionFactory"/>
</object>

<tx:attribute-driven transaction-manager="transactionManager"/>

Now when I start debugging from Visual Studio 2010 I get

System.NullReferenceException: Object reference not set to object instance.

Full stack trace:

    [NullReferenceException: Object reference not set to an instance of an object.]
   System.Xml.XmlReader.CalcBufferSize(Stream input) +14
   System.Xml.XmlTextReaderImpl.InitStreamInput(Uri baseUri, String baseUriStr, Stream stream, Byte[] bytes, Int32 byteCount, Encoding encoding) +66
   System.Xml.XmlTextReaderImpl..ctor(String url, Stream input, XmlNameTable nt) +93
   System.Xml.XmlTextReader..ctor(Stream input) +74
   NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream, String name) in d:\CSharp\NH\NH\nhibernate\src\NHibernate\Cfg\Configuration.cs:631

[MappingException: Could not configure datastore from input stream ]
   NHibernate.Cfg.Configuration.LogAndThrow(Exception exception) in d:\CSharp\NH\NH\nhibernate\src\NHibernate\Cfg\Configuration.cs:342
   NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream, String name) in d:\CSharp\NH\NH\nhibernate\src\NHibernate\Cfg\Configuration.cs:641
   NHibernate.Cfg.Configuration.AddInputStream(Stream xmlInputStream) in d:\CSharp\NH\NH\nhibernate\src\NHibernate\Cfg\Configuration.cs:611
   Spring.Data.NHibernate.LocalSessionFactoryObject.AfterPropertiesSet() in c:\_prj\spring-net\trunk\src\Spring\Spring.Data.NHibernate20\Data\NHibernate\LocalSessionFactoryObject.cs:599
   Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InvokeInitMethods(Object target, String name, IConfigurableObjectDefinition definition) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:1294
   Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.ConfigureObject(String name, RootObjectDefinition definition, IObjectWrapper wrapper) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:1890
   Spring.Objects.Factory.Support.WebObjectFactory.ConfigureObject(String name, RootObjectDefinition definition, IObjectWrapper wrapper) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Objects\Factory\Support\WebObjectFactory.cs:450
   Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:921

[ObjectCreationException: Error creating object with name 'NHibernateSessionFactory' defined in 'file [D:\Code\EMSApplication\EMSApplication\Web.xml] line 14' : Initialization of object failed : Could not configure datastore from input stream ]
   Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:938
   Spring.Objects.Factory.Support.AbstractObjectFactory.CreateAndCacheSingletonInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:2144
   Spring.Objects.Factory.Support.WebObjectFactory.CreateAndCacheSingletonInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Objects\Factory\Support\WebObjectFactory.cs:299
   Spring.Objects.Factory.Support.AbstractObjectFactory.GetObjectInternal(String name, Type requiredType, Object[] arguments, Boolean suppressConfigure) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:2065
   Spring.Objects.Factory.Support.AbstractObjectFactory.GetObject(String name) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:1826
   Spring.Objects.Factory.Support.DefaultListableObjectFactory.GetObjectsOfType(Type type, Boolean includePrototypes, Boolean includeFactoryObjects) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\DefaultListableObjectFactory.cs:770
   Spring.Objects.Factory.ObjectFactoryUtils.ObjectsOfTypeIncludingAncestors(IListableObjectFactory factory, Type type, Boolean includePrototypes, Boolean includeFactoryObjects) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\ObjectFactoryUtils.cs:268
   Spring.Dao.Support.PersistenceExceptionTranslationInterceptor.DetectPersistenceExceptionTranslators(IListableObjectFactory objectFactory) in c:\_prj\spring-net\trunk\src\Spring\Spring.Data\Dao\Support\PersistenceExceptionTranslationInterceptor.cs:155
   Spring.Dao.Support.PersistenceExceptionTranslationInterceptor..ctor(IListableObjectFactory objectFactory) in c:\_prj\spring-net\trunk\src\Spring\Spring.Data\Dao\Support\PersistenceExceptionTranslationInterceptor.cs:73
   Spring.Dao.Attributes.PersistenceExceptionTranslationAdvisor..ctor(IListableObjectFactory objectFactory, Type repositoryAttributeType) in c:\_prj\spring-net\trunk\src\Spring\Spring.Data\Dao\Attributes\PersistenceExceptionTranslationAdvisor.cs:63
   Spring.Dao.Attributes.PersistenceExceptionTranslationPostProcessor.set_ObjectFactory(IObjectFactory value) in c:\_prj\spring-net\trunk\src\Spring\Spring.Data\Dao\Attributes\PersistenceExceptionTranslationPostProcessor.cs:95
   Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.ConfigureObject(String name, RootObjectDefinition definition, IObjectWrapper wrapper) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:1886
   Spring.Objects.Factory.Support.WebObjectFactory.ConfigureObject(String name, RootObjectDefinition definition, IObjectWrapper wrapper) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Objects\Factory\Support\WebObjectFactory.cs:450
   Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractAutowireCapableObjectFactory.cs:930
   Spring.Objects.Factory.Support.AbstractObjectFactory.CreateAndCacheSingletonInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:2144
   Spring.Objects.Factory.Support.WebObjectFactory.CreateAndCacheSingletonInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Objects\Factory\Support\WebObjectFactory.cs:299
   Spring.Objects.Factory.Support.AbstractObjectFactory.GetObjectInternal(String name, Type requiredType, Object[] arguments, Boolean suppressConfigure) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:2065
   Spring.Objects.Factory.Support.AbstractObjectFactory.GetObject(String name) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\AbstractObjectFactory.cs:1826
   Spring.Objects.Factory.Support.DefaultListableObjectFactory.GetObjectsOfType(Type type, Boolean includePrototypes, Boolean includeFactoryObjects) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Objects\Factory\Support\DefaultListableObjectFactory.cs:770
   Spring.Context.Support.AbstractApplicationContext.GetObjectsOfType(Type type, Boolean includePrototypes, Boolean includeFactoryObjects) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Context\Support\AbstractApplicationContext.cs:1383
   Spring.Context.Support.AbstractApplicationContext.RegisterObjectPostProcessors(IConfigurableListableObjectFactory objectFactory) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Context\Support\AbstractApplicationContext.cs:652
   Spring.Context.Support.AbstractApplicationContext.Refresh() in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Context\Support\AbstractApplicationContext.cs:1000
   Spring.Context.Support.WebApplicationContext..ctor(WebApplicationContextArgs args) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Context\Support\WebApplicationContext.cs:125
   Spring.Context.Support.WebApplicationContext..ctor(String name, Boolean caseSensitive, String[] configurationLocations) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Context\Support\WebApplicationContext.cs:82
   _dynamic_Spring.Context.Support.WebApplicationContext..ctor(Object[] ) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Caching\AspNetCache.cs:126
   Spring.Reflection.Dynamic.SafeConstructor.Invoke(Object[] arguments) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Reflection\Dynamic\DynamicConstructor.cs:116
   Spring.Context.Support.RootContextInstantiator.InvokeContextConstructor(ConstructorInfo ctor) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextHandler.cs:563
   Spring.Context.Support.ContextInstantiator.InstantiateContext() in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextHandler.cs:508
   Spring.Context.Support.ContextHandler.InstantiateContext(IApplicationContext parentContext, Object configContext, String contextName, Type contextType, Boolean caseSensitive, String[] resources) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextHandler.cs:351
   Spring.Context.Support.WebContextHandler.InstantiateContext(IApplicationContext parent, Object configContext, String contextName, Type contextType, Boolean caseSensitive, String[] resources) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Context\Support\WebContextHandler.cs:127
   Spring.Context.Support.ContextHandler.Create(Object parent, Object configContext, XmlNode section) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Context\Support\ContextHandler.cs:289

[ConfigurationErrorsException: Error creating context 'spring.root': Could not configure datastore from input stream ]
   System.Configuration.BaseConfigurationRecord.EvaluateOne(String[] keys, SectionInput input, Boolean isTrusted, FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult) +199
   System.Configuration.BaseConfigurationRecord.Evaluate(FactoryRecord factoryRecord, SectionRecord sectionRecord, Object parentResult, Boolean getLkg, Boolean getRuntimeObject, Object& result, Object& resultRuntimeObject) +1153
   System.Configuration.BaseConfigurationRecord.GetSectionRecursive(String configKey, Boolean getLkg, Boolean checkPermission, Boolean getRuntimeObject, Boolean requestIsHere, Object& result, Object& resultRuntimeObject) +1468
   System.Configuration.BaseConfigurationRecord.GetSection(String configKey) +41
   System.Web.HttpContext.GetSection(String sectionName) +52
   System.Web.Configuration.HttpConfigurationSystem.GetSection(String sectionName) +57
   System.Web.Configuration.HttpConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String configKey) +6
   System.Configuration.ConfigurationManager.GetSection(String sectionName) +78
   Spring.Util.ConfigurationUtils.GetSection(String sectionName) in c:\_prj\spring-net\trunk\src\Spring\Spring.Core\Util\ConfigurationUtils.cs:71
   Spring.Context.Support.WebApplicationContext.GetContextInternal(String virtualPath) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Context\Support\WebApplicationContext.cs:335
   Spring.Context.Support.WebApplicationContext.GetRootContext() in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Context\Support\WebApplicationContext.cs:223
   Spring.Context.Support.WebSupportModule.Init(HttpApplication app) in c:\_prj\spring-net\trunk\src\Spring\Spring.Web\Context\Support\WebSupportModule.cs:175
   System.Web.HttpApplication.InitModulesCommon() +172
   System.Web.HttpApplication.InitModules() +43
   System.Web.HttpApplication.InitInternal(HttpContext context, HttpApplicationState state, MethodInfo[] handlers) +828
   System.Web.HttpApplicationFactory.GetNormalApplicationInstance(HttpContext context) +304
   System.Web.HttpApplicationFactory.GetApplicationInstance(HttpContext context) +107
   System.Web.HttpRuntime.ProcessRequestInternal(HttpWorkerRequest wr) +327

Here you can see:

[ObjectCreationException: Failed to create an object named "NHibernateSessionFactory" defined in file [D: \ Code \ EMSApplication \ EMSApplication \ Web.xml] line 14 ': Object initialization failed: Could not configure datastore from input stream]

So I cannot figure out how to solve this problem. Any help or suggestion that I really appreciate.

Thank.

NB: I haven't changed any settings in IIS 7.

Edit:

These are the links used:

enter image description here

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1 answer


Is it an assembly://EMSApplication/Domain/EMSApplication.hbm.xml

embedded resource (VS -> Properties -> Build Actions -> Embedded Resource)?

However, instead of pointing to an embedded resource, I would suggest pointing to an assembly, as @Marijn already pointed out in a previous post:



<propertyname="MappingAssemblies">
  <list>
    <value>EMSApplication.Domain</value> <-- Assembly name
  </list>
</property
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