eu.clarin.cmdi.mdservice.action
Class Cache

java.lang.Object
  eu.clarin.cmdi.mdservice.action.Cache

public class Cache
extends java.lang.Object

This is a rudimentary caching mechanism. serializes the inputstream to a file (identifier => filename) and returns the inpustream based on the identifier

Author:

master

Field Summary

private java.lang.Integer	cachecounter
private java.lang.String	cachepath
static java.lang.String	PREFIX
private static Cache	singleton
private static java.lang.Integer	start_cache

Constructor Summary

Cache()

Method Summary

protected void	finalize()
java.lang.String	formPath(java.lang.String id)
static Cache	getCache()
java.lang.Integer	getCounter()
java.io.InputStream	getFromCache(java.lang.String id)
java.lang.Integer	initCachecounter() read counter-integer from file in cache or start that file
java.lang.String	putInCache(java.lang.String id, java.io.InputStream instream) here the external key for the data gets cache-internal counter-id assigned which is also returned back can be used (as shorthand instead of the (long) external key) from outside to retrieve the data.
void	updateCachecounter()
void	writeCachecounter(java.lang.Integer i)

Methods inherited from class java.lang.Object

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

Field Detail

PREFIX

public static java.lang.String PREFIX

singleton

private static Cache singleton

cachepath

private java.lang.String cachepath

cachecounter

private java.lang.Integer cachecounter

start_cache

private static final java.lang.Integer start_cache

Constructor Detail

Cache

public Cache()

Method Detail

getCache

public static Cache getCache()

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class java.lang.Object

Throws:

java.lang.Throwable

putInCache

public java.lang.String putInCache(java.lang.String id,
                                   java.io.InputStream instream)

here the external key for the data gets cache-internal counter-id assigned which is also returned back can be used (as shorthand instead of the (long) external key) from outside to retrieve the data. This is primarily meant to be able to reuse the recordset-data, when reading one record.

Parameters:

id -

instream -

Returns:

getFromCache

public java.io.InputStream getFromCache(java.lang.String id)

formPath

public java.lang.String formPath(java.lang.String id)

getCounter

public java.lang.Integer getCounter()

initCachecounter

public java.lang.Integer initCachecounter()

read counter-integer from file in cache or start that file

Returns:

updateCachecounter

public void updateCachecounter()

writeCachecounter

public void writeCachecounter(java.lang.Integer i)