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org.vrspace.server.db
Class DBCache  

java.lang.Object
  org.vrspace.server.DB
      org.vrspace.server.db.DBCache

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public class DBCache

extends org.vrspace.server.DB

Database class

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Field Summary
private  org.vrspace.server.DB	db
private  java.util.TreeMap	tables

 

Fields inherited from class org.vrspace.server.DB

cache

 

Constructor Summary

DBCache(org.vrspace.server.DB db)

 

Method Summary
private  void	_put(java.lang.Object obj)           Stores obj into cache
void	commit()           Commit.
void	connect(java.lang.String name)           Connect to database.
java.lang.String	create(java.lang.String name)           create a new database if does not exist
private  java.util.TreeMap	createTable(java.lang.Object obj)
void	delete(java.lang.Object obj)           From the table obj.getClass().getName() deletes the row having db_id == obj.db_id, from both cache and the underlying db.
void	disconnect()           Disconnect
java.lang.Object	get(java.lang.Object obj)           Get an object.
java.lang.Object	get(java.lang.String className, long id)           Returns the object having id == obj.db_id
java.lang.Object	get(java.lang.String className, java.lang.String field, java.lang.Object value)           Returns the object of className class having field == value
java.lang.Object[]	getAll(java.lang.String className)           Returns all members of the class
java.lang.String	getClassName(java.lang.Object obj)
java.lang.Object[]	getRange(java.lang.Object o1, java.lang.Object o2)           Returns Object[] between o1 and o2 Class must have comparator() method to be searchable. TODO: map calls to underlying DB!
java.lang.Object[]	getRange(java.lang.String className, java.lang.String field, java.lang.Object value)           Returns Object[] of className class having field == value TODO: map calls on underlying DB
(package private)  java.util.TreeMap	getTables()           Returns references to cached tables
void	put(java.lang.Object obj)           Stores obj into database
boolean	tableExists(java.lang.String table)           Does table exist?
void	update(org.vrspace.server.Request r)           This method only passes request to underlying database.

 

Methods inherited from class org.vrspace.server.DB

load, load, load

 

Methods inherited from class java.lang.Object

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

 

Field Detail

tables

private java.util.TreeMap tables

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db

private org.vrspace.server.DB db

Constructor Detail

DBCache

public DBCache(org.vrspace.server.DB db)

Method Detail

create

public java.lang.String create(java.lang.String name)
                        throws java.lang.Exception

Description copied from class: org.vrspace.server.DB

create a new database if does not exist

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getTables

java.util.TreeMap getTables()

Returns references to cached tables

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connect

public void connect(java.lang.String name)
             throws java.lang.Exception

Connect to database. Calls underlying DB connect().

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disconnect

public void disconnect()

Disconnect

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commit

public void commit()

Commit. Just calls underlying commit

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get

public java.lang.Object get(java.lang.Object obj)
                     throws java.lang.Exception

Get an object.

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delete

public void delete(java.lang.Object obj)
            throws java.lang.Exception

From the table obj.getClass().getName() deletes the row having db_id == obj.db_id, from both cache and the underlying db.

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get

public java.lang.Object get(java.lang.String className,
                            long id)
                     throws java.lang.Exception

Returns the object having id == obj.db_id

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get

public java.lang.Object get(java.lang.String className,
                            java.lang.String field,
                            java.lang.Object value)
                     throws java.lang.Exception

Returns the object of className class having field == value

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getAll

public java.lang.Object[] getAll(java.lang.String className)
                          throws java.lang.Exception

Returns all members of the class

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getRange

public java.lang.Object[] getRange(java.lang.String className,
                                   java.lang.String field,
                                   java.lang.Object value)
                            throws java.lang.Exception

Returns Object[] of className class having field == value
TODO: map calls on underlying DB

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getRange

public java.lang.Object[] getRange(java.lang.Object o1,
                                   java.lang.Object o2)
                            throws java.lang.Exception

Returns Object[] between o1 and o2 Class must have comparator() method to be searchable.
TODO: map calls to underlying DB!

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getClassName

public java.lang.String getClassName(java.lang.Object obj)

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_put

private void _put(java.lang.Object obj)
           throws java.lang.Exception

Stores obj into cache

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put

public void put(java.lang.Object obj)
         throws java.lang.Exception

Stores obj into database

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update

public void update(org.vrspace.server.Request r)
            throws java.lang.Exception

This method only passes request to underlying database.

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tableExists

public boolean tableExists(java.lang.String table)

Does table exist?

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createTable

private java.util.TreeMap createTable(java.lang.Object obj)
                               throws DBException

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> vrspace >> server >> [ db overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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