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Java Source Code / Java Documentation » Web Framework » TURBINE » org.apache.turbine.services.pool 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.apache.turbine.services.TurbineBaseService
   org.apache.turbine.services.pool.TurbinePoolService

TurbinePoolService
public class TurbinePoolService extends TurbineBaseService implements PoolService(Code)
The Pool Service extends the Factory Service by adding support for pooling instantiated objects. When a new instance is requested, the service first checks its pool if one is available. If the the pool is empty, a new instance will be requested from the FactoryService.

For objects implementing the Recyclable interface, a recycle method will be called, when they taken from the pool, and a dispose method, when they are returned to the pool.
author:
   Ilkka Priha
author:
   Henning P. Schmiedehausen
version:
   $Id: TurbinePoolService.java 534527 2007-05-02 16:10:59Z tv $




Constructor Summary
public  TurbinePoolService()
     Constructs a Pool Service.

Method Summary
public  voidclearPool(String className)
     Clears instances of a named class from the pool.
public  voidclearPool()
     Clears all instances from the pool.
public  intgetCapacity(String className)
     Gets the capacity of the pool for a named class.
public  ObjectgetInstance(String className)
     Gets an instance of a named class either from the pool or by calling the Factory Service if the pool is empty.
Parameters:
  className - the name of the class.
public  ObjectgetInstance(String className, ClassLoader loader)
     Gets an instance of a named class either from the pool or by calling the Factory Service if the pool is empty. The specified class loader will be passed to the Factory Service.
Parameters:
  className - the name of the class.
Parameters:
  loader - the class loader.
public  ObjectgetInstance(String className, Object[] params, String[] signature)
     Gets an instance of a named class either from the pool or by calling the Factory Service if the pool is empty. Parameters for its constructor are given as an array of objects, primitive types must be wrapped with a corresponding class.
Parameters:
  className - the name of the class.
Parameters:
  loader - the class loader.
Parameters:
  params - an array containing the parameters of the constructor.
Parameters:
  signature - an array containing the signature of the constructor.
public  ObjectgetInstance(String className, ClassLoader loader, Object[] params, String[] signature)
     Gets an instance of a named class either from the pool or by calling the Factory Service if the pool is empty. Parameters for its constructor are given as an array of objects, primitive types must be wrapped with a corresponding class. The specified class loader will be passed to the Factory Service.
Parameters:
  className - the name of the class.
Parameters:
  loader - the class loader.
Parameters:
  params - an array containing the parameters of the constructor.
Parameters:
  signature - an array containing the signature of the constructor.
public  ObjectgetInstance(Class clazz)
     Gets an instance of a specified class either from the pool or by instatiating from the class if the pool is empty.
Parameters:
  clazz - the class.
public  ObjectgetInstance(Class clazz, Object params, String signature)
     Gets an instance of a specified class either from the pool or by instatiating from the class if the pool is empty.
Parameters:
  clazz - the class.
Parameters:
  params - an array containing the parameters of the constructor.
Parameters:
  signature - an array containing the signature of the constructor.
public  intgetSize(String className)
     Gets the current size of the pool for a named class.
public  voidinit()
     Initializes the service by setting the pool capacity.
public  booleanisLoaderSupported(String className)
     Tests if specified class loaders are supported for a named class.
Parameters:
  className - the name of the class.
public  booleanputInstance(Object instance)
     Puts a used object back to the pool.
public  voidsetCapacity(String className, int capacity)
     Sets the capacity of the pool for a named class.


Constructor Detail
TurbinePoolService
public TurbinePoolService()(Code)
Constructs a Pool Service.




Method Detail
clearPool
public void clearPool(String className)(Code)
Clears instances of a named class from the pool.
Parameters:
  className - the name of the class.



clearPool
public void clearPool()(Code)
Clears all instances from the pool.



getCapacity
public int getCapacity(String className)(Code)
Gets the capacity of the pool for a named class.
Parameters:
  className - the name of the class.



getInstance
public Object getInstance(String className) throws TurbineException(Code)
Gets an instance of a named class either from the pool or by calling the Factory Service if the pool is empty.
Parameters:
  className - the name of the class. the instance.
throws:
  TurbineException - if recycling fails.



getInstance
public Object getInstance(String className, ClassLoader loader) throws TurbineException(Code)
Gets an instance of a named class either from the pool or by calling the Factory Service if the pool is empty. The specified class loader will be passed to the Factory Service.
Parameters:
  className - the name of the class.
Parameters:
  loader - the class loader. the instance.
throws:
  TurbineException - if recycling fails.



getInstance
public Object getInstance(String className, Object[] params, String[] signature) throws TurbineException(Code)
Gets an instance of a named class either from the pool or by calling the Factory Service if the pool is empty. Parameters for its constructor are given as an array of objects, primitive types must be wrapped with a corresponding class.
Parameters:
  className - the name of the class.
Parameters:
  loader - the class loader.
Parameters:
  params - an array containing the parameters of the constructor.
Parameters:
  signature - an array containing the signature of the constructor. the instance.
throws:
  TurbineException - if recycling fails.



getInstance
public Object getInstance(String className, ClassLoader loader, Object[] params, String[] signature) throws TurbineException(Code)
Gets an instance of a named class either from the pool or by calling the Factory Service if the pool is empty. Parameters for its constructor are given as an array of objects, primitive types must be wrapped with a corresponding class. The specified class loader will be passed to the Factory Service.
Parameters:
  className - the name of the class.
Parameters:
  loader - the class loader.
Parameters:
  params - an array containing the parameters of the constructor.
Parameters:
  signature - an array containing the signature of the constructor. the instance.
throws:
  TurbineException - if recycling fails.



getInstance
public Object getInstance(Class clazz) throws TurbineException(Code)
Gets an instance of a specified class either from the pool or by instatiating from the class if the pool is empty.
Parameters:
  clazz - the class. the instance.
throws:
  TurbineException - if recycling fails.



getInstance
public Object getInstance(Class clazz, Object params, String signature) throws TurbineException(Code)
Gets an instance of a specified class either from the pool or by instatiating from the class if the pool is empty.
Parameters:
  clazz - the class.
Parameters:
  params - an array containing the parameters of the constructor.
Parameters:
  signature - an array containing the signature of the constructor. the instance.
throws:
  TurbineException - if recycling fails.



getSize
public int getSize(String className)(Code)
Gets the current size of the pool for a named class.
Parameters:
  className - the name of the class.



init
public void init() throws InitializationException(Code)
Initializes the service by setting the pool capacity.
Parameters:
  config - initialization configuration.
throws:
  InitializationException - if initialization fails.



isLoaderSupported
public boolean isLoaderSupported(String className) throws TurbineException(Code)
Tests if specified class loaders are supported for a named class.
Parameters:
  className - the name of the class. true if class loaders are supported, false otherwise.
throws:
  TurbineException - if test fails.



putInstance
public boolean putInstance(Object instance)(Code)
Puts a used object back to the pool. Objects implementing the Recyclable interface can provide a recycle method to be called when they are reused and a dispose method to be called when they are returned to the pool.
Parameters:
  instance - the object instance to recycle. true if the instance was accepted.



setCapacity
public void setCapacity(String className, int capacity)(Code)
Sets the capacity of the pool for a named class. Note that the pool will be cleared after the change.
Parameters:
  className - the name of the class.
Parameters:
  capacity - the new capacity.



Methods inherited from org.apache.turbine.services.TurbineBaseService
public void init(Object data) throws InitializationException(Code)(Java Doc)
public void init(ServletConfig config) throws InitializationException(Code)(Java Doc)
public void init(RunData data) throws InitializationException(Code)(Java Doc)
public void init() throws InitializationException(Code)(Java Doc)
public void shutdown()(Code)(Java Doc)

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