Question

这是一个长镜头......

我正在使用spring 1.3.2，并且在随机时间我得到ArgumentNullException异常（请参阅下面的堆栈跟踪）。

我在XML和Code之间混合配置容器（直接使用ObjectDefinitionBuilder，没有代码配置）。注册并行进行（5个线程加载定义）。

我的所有对象都使用通过构造函数自动装配，错误发生在构造函数中具有项目的两个组件中。

在所有内容都已在容器中注册后，我正在进行以下调用

context.GetObjectsOfType(typeof (IFoo)).OfType<DictionaryEntry>().Select(d => (IFoo) d.Value)

从堆栈跟踪中查看代码，我发现对IsAlias的调用似乎失败了，但我不确定我是否理解这是怎么回事。

有什么想法/想法吗？

堆栈追踪：

Spring.Objects.Factory.ObjectCreationException: Error creating object with name 'My.App.SomeFooImplementation' : Initialization of object failed : Key cannot be null. Parameter name: key ---> System.ArgumentNullException: Key cannot be null. Parameter name: key at System.Collections.Hashtable.ContainsKey(Object key) at System.Collections.Specialized.OrderedDictionary.Contains(Object key) at Spring.Objects.Factory.Support.AbstractObjectFactory.IsAlias(String name) at Spring.Objects.Factory.Support.DefaultListableObjectFactory.DoGetObjectNamesForType(Type type, Boolean includeNonSingletons, Boolean allowEagerInit) at Spring.Objects.Factory.Support.DefaultListableObjectFactory.GetObjectNamesForType(Type type, Boolean includePrototypes, Boolean includeFactoryObjects) at Spring.Objects.Factory.ObjectFactoryUtils.ObjectNamesForTypeIncludingAncestors(IListableObjectFactory factory, Type type, Boolean includePrototypes, Boolean includeFactoryObjects) at Spring.Objects.Factory.Support.DefaultListableObjectFactory.FindAutowireCandidates(String objectName, Type requiredType, DependencyDescriptor descriptor) at Spring.Objects.Factory.Support.DefaultListableObjectFactory.ResolveDependency(DependencyDescriptor descriptor, String objectName, IList autowiredObjectNames) at Spring.Objects.Factory.Support.ConstructorResolver.CreateArgumentArray(String objectName, RootObjectDefinition rod, ConstructorArgumentValues resolvedValues, ObjectWrapper wrapper, Type[] paramTypes, MethodBase methodOrCtorInfo, Boolean autowiring, UnsatisfiedDependencyExceptionData& unsatisfiedDependencyExceptionData) at Spring.Objects.Factory.Support.ConstructorResolver.AutowireConstructor(String objectName, RootObjectDefinition rod, ConstructorInfo[] chosenCtors, Object[] explicitArgs) at Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.CreateObjectInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) at Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) --- End of inner exception stack trace --- at Spring.Objects.Factory.Support.AbstractAutowireCapableObjectFactory.InstantiateObject(String name, RootObjectDefinition definition, Object[] arguments, Boolean allowEagerCaching, Boolean suppressConfigure) at Spring.Objects.Factory.Support.AbstractObjectFactory.CreateAndCacheSingletonInstance(String objectName, RootObjectDefinition objectDefinition, Object[] arguments) at Spring.Objects.Factory.Support.AbstractObjectFactory.GetObjectInternal(String name, Type requiredType, Object[] arguments, Boolean suppressConfigure) at Spring.Objects.Factory.Support.AbstractObjectFactory.GetObject(String name)

修改我刚刚得到了所有的定义名称，并且在那里有一个空条目，这似乎是问题，不知道它为什么会发生......

Answer 1

我能想出的唯一解决方法是将内部objectDefinitionNames ArrayList更改为使用ArrayList.Synchronized进行反射。 一点都不好但似乎做了这件事。

        var field = factory.GetType().GetField("objectDefinitionNames", BindingFlags.NonPublic | BindingFlags.Instance);
        if (field == null)
            throw new InvalidOperationException("Could not get Definitions field from application context.");

        var value = (ArrayList) field.GetValue(factory);
        field.SetValue(factory, ArrayList.Synchronized(value));

Spring.Objects.Factory.ObjectCreationException：System.ArgumentNullException：Key不能为null

1 个答案: