Common
Class SessionMgr

java.lang.Object
  Common.SessionMgr

All Implemented Interfaces:

java.io.Serializable

public class SessionMgr
extends java.lang.Object
implements java.io.Serializable

Session manager class. This class stores all the session wide data. Upon application exit, the class serializes all its variables. Upon application restart, those variables are read back in and restored to their original values. Eg, directory locations for input files are remembered across sessions.

Since:

1.0

See Also:

Serialized Form

Field Summary

private java.util.Map<java.lang.String,java.lang.String>	mAttributeToVal Map storing attributes.
private static SessionMgr	mInstance
private java.lang.String	mMapFileName
private static char	mSeparator
static java.lang.String	mSerialFileName
private static long	serialVersionUID

Constructor Summary

private

SessionMgr() SessionMgr is a singleton class.

Method Summary

java.lang.String	GetAttribute(java.lang.String moduleName, java.lang.String attrName) Get the attribute value for the module name and attribute.
java.lang.String	GetMapFileName()
static SessionMgr	Instance() Get the SessionMgr singleton instance.
private void	ReadMap()
private void	readObject(java.io.ObjectInputStream in) Read object back (deserialization).
void	SaveAttribute(java.lang.String moduleName, java.lang.String attrName, java.lang.String val)
private void	WriteMap()
private void	writeObject(java.io.ObjectOutputStream out) Write object for serialization.

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

mSeparator

private static final char mSeparator

See Also:

Constant Field Values

mSerialFileName

public static final java.lang.String mSerialFileName

See Also:

Constant Field Values

mMapFileName

private java.lang.String mMapFileName

mAttributeToVal

private java.util.Map<java.lang.String,java.lang.String> mAttributeToVal

Map storing attributes. Key of this map is constructed as follows: module_name + ":" + attr_name

mInstance

private static SessionMgr mInstance

Constructor Detail

SessionMgr

private SessionMgr()

SessionMgr is a singleton class.

Method Detail

Instance

public static SessionMgr Instance()

Get the SessionMgr singleton instance.

Returns:

SesionMgr instance

GetMapFileName

public java.lang.String GetMapFileName()

SaveAttribute

public void SaveAttribute(java.lang.String moduleName,
                          java.lang.String attrName,
                          java.lang.String val)

GetAttribute

public java.lang.String GetAttribute(java.lang.String moduleName,
                                     java.lang.String attrName)
                              throws java.lang.IllegalArgumentException

Get the attribute value for the module name and attribute.

Parameters:

moduleName - Name of module

attrName - Name of attribute

Returns:

Value of attribute for a particular module

Throws:

java.lang.IllegalArgumentException - If the attribute or module name has not been stored.

WriteMap

private void WriteMap()

ReadMap

private void ReadMap()

writeObject

private void writeObject(java.io.ObjectOutputStream out)
                  throws java.io.IOException

Write object for serialization.

Parameters:

out - ObjectOutputStream

Throws:

java.io.IOException

readObject

private void readObject(java.io.ObjectInputStream in)
                 throws java.io.IOException,
                        java.lang.ClassNotFoundException

Read object back (deserialization).

Parameters:

in - ObjectInputStream

Throws:

java.io.IOException

java.lang.ClassNotFoundException