com.rhi.architecture.resource.shmem
Class PersistentSharedMemory

java.lang.Object
  com.rhi.architecture.resource.shmem.PersistentSharedMemory

All Implemented Interfaces:

Resource, SharedMemory

public class PersistentSharedMemory

extends java.lang.Object

implements SharedMemory

Object used to share memory between threads. The shared memory is persisted to a file.

Author:

geolun01

Constructor Summary

PersistentSharedMemory()

Method Summary

void	close() Set our shared data to null
java.lang.Object	getSharedData() Returns the sharedData.
void	init(java.util.Properties props) No initialization is required
void	setPersistenceFile(java.lang.String fileName) Sets the file to be used to persist the stored object.
void	setSharedData(java.lang.Object sharedData) Sets the sharedData and then persists it to a file, if the file is available

Methods inherited from class java.lang.Object

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

Constructor Detail

PersistentSharedMemory

public PersistentSharedMemory()

Method Detail

init

public void init(java.util.Properties props)

No initialization is required

Specified by:

init in interface Resource

Parameters:

props -

close

public void close()

Set our shared data to null

Specified by:

close in interface Resource

See Also:

Resource.close()

setPersistenceFile

public void setPersistenceFile(java.lang.String fileName)
                        throws java.io.IOException,
                               java.lang.ClassNotFoundException

Sets the file to be used to persist the stored object. Any calls after the first call are ignored assuming the first call was successful.

Parameters:

fileName - Name of the file to be used for persistance

Throws:

java.io.IOException - Thrown if an error occurs while reading from the file

java.lang.ClassNotFoundException - Thrown if the loaded object's class cannot be found

setSharedData

public void setSharedData(java.lang.Object sharedData)
                   throws java.io.IOException

Sets the sharedData and then persists it to a file, if the file is available

Specified by:

setSharedData in interface SharedMemory

Parameters:

sharedData - The sharedData to set

Throws:

java.io.IOException - Thrown if an error occurs while writing to the file

getSharedData

public java.lang.Object getSharedData()

Returns the sharedData.

Specified by:

getSharedData in interface SharedMemory

Returns:

Object