Class SimpleJndiBeanFactory

All Implemented Interfaces:
BeanFactory

public class SimpleJndiBeanFactory extends JndiLocatorSupport implements BeanFactory
Simple JNDI-based implementation of Spring's BeanFactory interface. Does not support enumerating bean definitions, hence doesn't implement the ListableBeanFactory interface.

This factory resolves given bean names as JNDI names within the Jakarta EE application's "java:comp/env/" namespace. It caches the resolved types for all obtained objects, and optionally also caches shareable objects (if they are explicitly marked as shareable resource).

The main intent of this factory is usage in combination with Spring's CommonAnnotationBeanPostProcessor, configured as "resourceFactory" for resolving @Resource annotations as JNDI objects without intermediate bean definitions. It may be used for similar lookup scenarios as well, of course, in particular if BeanFactory-style type checking is required.

Since:
2.5
Author:
Juergen Hoeller
See Also:
  • Constructor Details

    • SimpleJndiBeanFactory

      public SimpleJndiBeanFactory()
  • Method Details

    • addShareableResource

      public void addShareableResource(String shareableResource)
      Add the name of a shareable JNDI resource, which this factory is allowed to cache once obtained.
      Parameters:
      shareableResource - the JNDI name (typically within the "java:comp/env/" namespace)
    • setShareableResources

      public void setShareableResources(String... shareableResources)
      Set a list of names of shareable JNDI resources, which this factory is allowed to cache once obtained.
      Parameters:
      shareableResources - the JNDI names (typically within the "java:comp/env/" namespace)
    • getBean

      public Object getBean(String name) throws BeansException
      Description copied from interface: BeanFactory
      Return an instance, which may be shared or independent, of the specified bean.

      This method allows a Spring BeanFactory to be used as a replacement for the Singleton or Prototype design pattern. Callers may retain references to returned objects in the case of Singleton beans.

      Translates aliases back to the corresponding canonical bean name.

      Will ask the parent factory if the bean cannot be found in this factory instance.

      Specified by:
      getBean in interface BeanFactory
      Parameters:
      name - the name of the bean to retrieve
      Returns:
      an instance of the bean
      Throws:
      NoSuchBeanDefinitionException - if there is no bean with the specified name
      BeansException - if the bean could not be obtained
    • getBean

      public <T> T getBean(String name, Class<T> requiredType) throws BeansException
      Description copied from interface: BeanFactory
      Return an instance, which may be shared or independent, of the specified bean.

      Behaves the same as BeanFactory.getBean(String), but provides a measure of type safety by throwing a BeanNotOfRequiredTypeException if the bean is not of the required type. This means that ClassCastException can't be thrown on casting the result correctly, as can happen with BeanFactory.getBean(String).

      Translates aliases back to the corresponding canonical bean name.

      Will ask the parent factory if the bean cannot be found in this factory instance.

      Specified by:
      getBean in interface BeanFactory
      Parameters:
      name - the name of the bean to retrieve
      requiredType - type the bean must match; can be an interface or superclass
      Returns:
      an instance of the bean
      Throws:
      NoSuchBeanDefinitionException - if there is no such bean definition
      BeanNotOfRequiredTypeException - if the bean is not of the required type
      BeansException - if the bean could not be created
    • getBean

      public Object getBean(String name, @Nullable Object... args) throws BeansException
      Description copied from interface: BeanFactory
      Return an instance, which may be shared or independent, of the specified bean.

      Allows for specifying explicit constructor arguments / factory method arguments, overriding the specified default arguments (if any) in the bean definition.

      Specified by:
      getBean in interface BeanFactory
      Parameters:
      name - the name of the bean to retrieve
      args - arguments to use when creating a bean instance using explicit arguments (only applied when creating a new instance as opposed to retrieving an existing one)
      Returns:
      an instance of the bean
      Throws:
      NoSuchBeanDefinitionException - if there is no such bean definition
      BeanDefinitionStoreException - if arguments have been given but the affected bean isn't a prototype
      BeansException - if the bean could not be created
    • getBean

      public <T> T getBean(Class<T> requiredType) throws BeansException
      Description copied from interface: BeanFactory
      Return the bean instance that uniquely matches the given object type, if any.

      This method goes into ListableBeanFactory by-type lookup territory but may also be translated into a conventional by-name lookup based on the name of the given type. For more extensive retrieval operations across sets of beans, use ListableBeanFactory and/or BeanFactoryUtils.

      Specified by:
      getBean in interface BeanFactory
      Parameters:
      requiredType - type the bean must match; can be an interface or superclass
      Returns:
      an instance of the single bean matching the required type
      Throws:
      NoSuchBeanDefinitionException - if no bean of the given type was found
      NoUniqueBeanDefinitionException - if more than one bean of the given type was found
      BeansException - if the bean could not be created
      See Also:
    • getBean

      public <T> T getBean(Class<T> requiredType, @Nullable Object... args) throws BeansException
      Description copied from interface: BeanFactory
      Return an instance, which may be shared or independent, of the specified bean.

      Allows for specifying explicit constructor arguments / factory method arguments, overriding the specified default arguments (if any) in the bean definition.

      This method goes into ListableBeanFactory by-type lookup territory but may also be translated into a conventional by-name lookup based on the name of the given type. For more extensive retrieval operations across sets of beans, use ListableBeanFactory and/or BeanFactoryUtils.

      Specified by:
      getBean in interface BeanFactory
      Parameters:
      requiredType - type the bean must match; can be an interface or superclass
      args - arguments to use when creating a bean instance using explicit arguments (only applied when creating a new instance as opposed to retrieving an existing one)
      Returns:
      an instance of the bean
      Throws:
      NoSuchBeanDefinitionException - if there is no such bean definition
      BeanDefinitionStoreException - if arguments have been given but the affected bean isn't a prototype
      BeansException - if the bean could not be created
    • getBeanProvider

      public <T> ObjectProvider<T> getBeanProvider(Class<T> requiredType)
      Description copied from interface: BeanFactory
      Return a provider for the specified bean, allowing for lazy on-demand retrieval of instances, including availability and uniqueness options.

      For matching a generic type, consider BeanFactory.getBeanProvider(ResolvableType).

      Specified by:
      getBeanProvider in interface BeanFactory
      Parameters:
      requiredType - type the bean must match; can be an interface or superclass
      Returns:
      a corresponding provider handle
      See Also:
    • getBeanProvider

      public <T> ObjectProvider<T> getBeanProvider(ResolvableType requiredType)
      Description copied from interface: BeanFactory
      Return a provider for the specified bean, allowing for lazy on-demand retrieval of instances, including availability and uniqueness options. This variant allows for specifying a generic type to match, similar to reflective injection points with generic type declarations in method/constructor parameters.

      Note that collections of beans are not supported here, in contrast to reflective injection points. For programmatically retrieving a list of beans matching a specific type, specify the actual bean type as an argument here and subsequently use ObjectProvider.orderedStream() or its lazy streaming/iteration options.

      Also, generics matching is strict here, as per the Java assignment rules. For lenient fallback matching with unchecked semantics (similar to the ┬┤unchecked┬┤ Java compiler warning), consider calling BeanFactory.getBeanProvider(Class) with the raw type as a second step if no full generic match is available with this variant.

      Specified by:
      getBeanProvider in interface BeanFactory
      Parameters:
      requiredType - type the bean must match; can be a generic type declaration
      Returns:
      a corresponding provider handle
      See Also:
    • containsBean

      public boolean containsBean(String name)
      Description copied from interface: BeanFactory
      Does this bean factory contain a bean definition or externally registered singleton instance with the given name?

      If the given name is an alias, it will be translated back to the corresponding canonical bean name.

      If this factory is hierarchical, will ask any parent factory if the bean cannot be found in this factory instance.

      If a bean definition or singleton instance matching the given name is found, this method will return true whether the named bean definition is concrete or abstract, lazy or eager, in scope or not. Therefore, note that a true return value from this method does not necessarily indicate that BeanFactory.getBean(java.lang.String) will be able to obtain an instance for the same name.

      Specified by:
      containsBean in interface BeanFactory
      Parameters:
      name - the name of the bean to query
      Returns:
      whether a bean with the given name is present
    • isSingleton

      public boolean isSingleton(String name) throws NoSuchBeanDefinitionException
      Description copied from interface: BeanFactory
      Is this bean a shared singleton? That is, will BeanFactory.getBean(java.lang.String) always return the same instance?

      Note: This method returning false does not clearly indicate independent instances. It indicates non-singleton instances, which may correspond to a scoped bean as well. Use the BeanFactory.isPrototype(java.lang.String) operation to explicitly check for independent instances.

      Translates aliases back to the corresponding canonical bean name.

      Will ask the parent factory if the bean cannot be found in this factory instance.

      Specified by:
      isSingleton in interface BeanFactory
      Parameters:
      name - the name of the bean to query
      Returns:
      whether this bean corresponds to a singleton instance
      Throws:
      NoSuchBeanDefinitionException - if there is no bean with the given name
      See Also:
    • isPrototype

      public boolean isPrototype(String name) throws NoSuchBeanDefinitionException
      Description copied from interface: BeanFactory
      Is this bean a prototype? That is, will BeanFactory.getBean(java.lang.String) always return independent instances?

      Note: This method returning false does not clearly indicate a singleton object. It indicates non-independent instances, which may correspond to a scoped bean as well. Use the BeanFactory.isSingleton(java.lang.String) operation to explicitly check for a shared singleton instance.

      Translates aliases back to the corresponding canonical bean name.

      Will ask the parent factory if the bean cannot be found in this factory instance.

      Specified by:
      isPrototype in interface BeanFactory
      Parameters:
      name - the name of the bean to query
      Returns:
      whether this bean will always deliver independent instances
      Throws:
      NoSuchBeanDefinitionException - if there is no bean with the given name
      See Also:
    • isTypeMatch

      public boolean isTypeMatch(String name, ResolvableType typeToMatch) throws NoSuchBeanDefinitionException
      Description copied from interface: BeanFactory
      Check whether the bean with the given name matches the specified type. More specifically, check whether a BeanFactory.getBean(java.lang.String) call for the given name would return an object that is assignable to the specified target type.

      Translates aliases back to the corresponding canonical bean name.

      Will ask the parent factory if the bean cannot be found in this factory instance.

      Specified by:
      isTypeMatch in interface BeanFactory
      Parameters:
      name - the name of the bean to query
      typeToMatch - the type to match against (as a ResolvableType)
      Returns:
      true if the bean type matches, false if it doesn't match or cannot be determined yet
      Throws:
      NoSuchBeanDefinitionException - if there is no bean with the given name
      See Also:
    • isTypeMatch

      public boolean isTypeMatch(String name, @Nullable Class<?> typeToMatch) throws NoSuchBeanDefinitionException
      Description copied from interface: BeanFactory
      Check whether the bean with the given name matches the specified type. More specifically, check whether a BeanFactory.getBean(java.lang.String) call for the given name would return an object that is assignable to the specified target type.

      Translates aliases back to the corresponding canonical bean name.

      Will ask the parent factory if the bean cannot be found in this factory instance.

      Specified by:
      isTypeMatch in interface BeanFactory
      Parameters:
      name - the name of the bean to query
      typeToMatch - the type to match against (as a Class)
      Returns:
      true if the bean type matches, false if it doesn't match or cannot be determined yet
      Throws:
      NoSuchBeanDefinitionException - if there is no bean with the given name
      See Also:
    • getType

      @Nullable public Class<?> getType(String name) throws NoSuchBeanDefinitionException
      Description copied from interface: BeanFactory
      Determine the type of the bean with the given name. More specifically, determine the type of object that BeanFactory.getBean(java.lang.String) would return for the given name.

      For a FactoryBean, return the type of object that the FactoryBean creates, as exposed by FactoryBean.getObjectType(). This may lead to the initialization of a previously uninitialized FactoryBean (see BeanFactory.getType(String, boolean)).

      Translates aliases back to the corresponding canonical bean name.

      Will ask the parent factory if the bean cannot be found in this factory instance.

      Specified by:
      getType in interface BeanFactory
      Parameters:
      name - the name of the bean to query
      Returns:
      the type of the bean, or null if not determinable
      Throws:
      NoSuchBeanDefinitionException - if there is no bean with the given name
      See Also:
    • getType

      @Nullable public Class<?> getType(String name, boolean allowFactoryBeanInit) throws NoSuchBeanDefinitionException
      Description copied from interface: BeanFactory
      Determine the type of the bean with the given name. More specifically, determine the type of object that BeanFactory.getBean(java.lang.String) would return for the given name.

      For a FactoryBean, return the type of object that the FactoryBean creates, as exposed by FactoryBean.getObjectType(). Depending on the allowFactoryBeanInit flag, this may lead to the initialization of a previously uninitialized FactoryBean if no early type information is available.

      Translates aliases back to the corresponding canonical bean name.

      Will ask the parent factory if the bean cannot be found in this factory instance.

      Specified by:
      getType in interface BeanFactory
      Parameters:
      name - the name of the bean to query
      allowFactoryBeanInit - whether a FactoryBean may get initialized just for the purpose of determining its object type
      Returns:
      the type of the bean, or null if not determinable
      Throws:
      NoSuchBeanDefinitionException - if there is no bean with the given name
      See Also:
    • getAliases

      public String[] getAliases(String name)
      Description copied from interface: BeanFactory
      Return the aliases for the given bean name, if any.

      All of those aliases point to the same bean when used in a BeanFactory.getBean(java.lang.String) call.

      If the given name is an alias, the corresponding original bean name and other aliases (if any) will be returned, with the original bean name being the first element in the array.

      Will ask the parent factory if the bean cannot be found in this factory instance.

      Specified by:
      getAliases in interface BeanFactory
      Parameters:
      name - the bean name to check for aliases
      Returns:
      the aliases, or an empty array if none
      See Also: