Class SimpleInstanceManager

java.lang.Object

org.apache.tomcat.SimpleInstanceManager

All Implemented Interfaces:

InstanceManager

public class SimpleInstanceManager
extends Object
implements InstanceManager

SimpleInstanceManager implements the org.apache.tomcat.InstanceManager interface. Instances are created using their public no-argument constructor. No dependency injection is performed and no pre-destroy callbacks are invoked.

Constructor Summary

Constructors

Constructor	Description
SimpleInstanceManager()	Creates a new SimpleInstanceManager.

Method Summary

Modifier and Type	Method	Description
void	destroyInstance(Object o)	Destroy the given instance, performing pre-destroy callbacks.
Object	newInstance(Class<?> clazz)	Create a new instance of the given class.
void	newInstance(Object o)	Perform dependency injection on the given object.
Object	newInstance(String className)	Create a new instance of the class with the given name.
Object	newInstance(String fqcn, ClassLoader classLoader)	Create a new instance of the class with the given name using the specified class loader.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface InstanceManager

backgroundProcess

Constructor Details

SimpleInstanceManager

public SimpleInstanceManager()

Creates a new SimpleInstanceManager.

Method Details

newInstance

public Object newInstance(Class<?> clazz)
                   throws IllegalAccessException,
InvocationTargetException,
NamingException,
InstantiationException,
NoSuchMethodException

Description copied from interface: InstanceManager

Create a new instance of the given class.

Specified by:

newInstance in interface InstanceManager

Parameters:

clazz - The class to instantiate

Returns:

the new instance

Throws:

IllegalAccessException - if the class or its nullary constructor is not accessible

InvocationTargetException - if the nullary constructor throws an exception

NamingException - if a naming exception is encountered

InstantiationException - if this Class represents an abstract class, an interface, an array class, a primitive type, or void

NoSuchMethodException - if the nullary method cannot be found

newInstance

public Object newInstance(String className)
                   throws IllegalAccessException,
InvocationTargetException,
NamingException,
InstantiationException,
ClassNotFoundException,
NoSuchMethodException

Description copied from interface: InstanceManager

Create a new instance of the class with the given name.

Specified by:

newInstance in interface InstanceManager

Parameters:

className - The name of the class to instantiate

Returns:

the new instance

Throws:

IllegalAccessException - if the class or its nullary constructor is not accessible

InvocationTargetException - if the nullary constructor throws an exception

NamingException - if a naming exception is encountered

InstantiationException - if this Class represents an abstract class, an interface, an array class, a primitive type, or void

ClassNotFoundException - if the class cannot be found

NoSuchMethodException - if the nullary method cannot be found

newInstance

public Object newInstance(String fqcn,
 ClassLoader classLoader)
                   throws IllegalAccessException,
InvocationTargetException,
NamingException,
InstantiationException,
ClassNotFoundException,
NoSuchMethodException

Description copied from interface: InstanceManager

Create a new instance of the class with the given name using the specified class loader.

Specified by:

newInstance in interface InstanceManager

Parameters:

fqcn - The fully qualified class name

classLoader - The class loader to use for loading the class

Returns:

the new instance

Throws:

IllegalAccessException - if the class or its nullary constructor is not accessible

InvocationTargetException - if the nullary constructor throws an exception

NamingException - if a naming exception is encountered

InstantiationException - if this Class represents an abstract class, an interface, an array class, a primitive type, or void

ClassNotFoundException - if the class cannot be found

NoSuchMethodException - if the nullary method cannot be found

newInstance

public void newInstance(Object o)
                 throws IllegalAccessException,
InvocationTargetException,
NamingException

Perform dependency injection on the given object.

This method is a NO-OP in this implementation.

Specified by:

newInstance in interface InstanceManager

Parameters:

o - The object to inject dependencies into

Throws:

IllegalAccessException - if the injection or lifecycle targets are not accessible

InvocationTargetException - if the injected setter or @PostConstruct throws an exception

NamingException - if a naming exception is encountered

destroyInstance

public void destroyInstance(Object o)
                     throws IllegalAccessException,
InvocationTargetException

Destroy the given instance, performing pre-destroy callbacks.

This method is a NO-OP in this implementation.

Specified by:

destroyInstance in interface InstanceManager

Parameters:

o - The object to destroy

Throws:

IllegalAccessException - if the injection or lifecycle targets are not accessible

InvocationTargetException - if @PreDestroy throws an exception