org.mmbase.module
Interface scancacheInterface

All Known Implementing Classes:

scancache

public interface scancacheInterface

File cache system interface. System for caching texts (it stores and retrieves strings) by use of a key. While in theory it is possible to cache ANY text, this is mainly used to store pages based on their url.
Caching is done in pools. Each pool has its own memory cache and files, and has different ways to handle file caching.

Version:

$Id: scancacheInterface.java 35335 2009-05-21 08:14:41Z michiel $

Author:

Daniel Ockeloen, Pierre van Rooden (javadocs)

Application:

SCAN

Rename:

SCANCacheInterface

Method Summary

String	get(String pool, String key, scanpage sp) Retrieve a file from the indicated pool's cache.
String	get(String pool, String key, String line, scanpage sp) Retrieve a file from the indicated pool's cache.
long	getExpireDate(String poolName, String key, String expireStr) getExpireDate.
long	getLastModDate(String poolName, String key) getLastModDate.
void	init() Initializes the module.
String	newput(String pool, HttpServletResponse res, String key, String value, String mimeType) Store a file in the indicated pool's cache.
String	newput2(String pool, String key, String value, int cachetype, String mimeType) Deprecated. Temporary hack for solving asis problems (?). Use newput(String, HttpServletResponse, String, String, String) instead.
String	put(String pool, String key, String value) Store a file in the indicated pool's cache.
void	remove(String poolName, String key) Removes an entry from the cache pool.

Method Detail

init

void init()

Initializes the module. Also defined in ModuleInterface, so why is it in here?

get

String get(String pool,
           String key,
           scanpage sp)

Retrieve a file from the indicated pool's cache.

Parameters:

pool - name of the cache pool

key - key under which the content was cached

Returns:

the cached content as a string, or null if no entry was found (i.e. cache was empty or poolname was invalid).

get

String get(String pool,
           String key,
           String line,
           scanpage sp)

Retrieve a file from the indicated pool's cache.

Parameters:

pool - name of the cache pool

key - key under which the content was cached

line - options for retrieving, such as an expiration value

Returns:

the cached content as a string, or null if no entry was found (i.e. cache was empty or poolname was invalid).

getExpireDate

long getExpireDate(String poolName,
                   String key,
                   String expireStr)

getExpireDate.

Parameters:

poolName -

key -

expireStr -

Returns:

long

getLastModDate

long getLastModDate(String poolName,
                    String key)

getLastModDate.

Parameters:

poolName -

key -

Returns:

long

put

String put(String pool,
           String key,
           String value)

Store a file in the indicated pool's cache. Returns the old value if available.

Parameters:

pool - name of the cache pool

key - key under which the content was cached

value - content to store

Returns:

the old cached content as a string, or null if no entry was found

newput

String newput(String pool,
              HttpServletResponse res,
              String key,
              String value,
              String mimeType)

Store a file in the indicated pool's cache. Returns the old value if available.

Parameters:

pool - name of the cache pool

res - response object for retrieving headers (used by mmbase.org?)

key - key under which the content was cached

value - content to store

mimeType - the content's mime type

Returns:

the old cached content as a string, or null if no entry was found

newput2

String newput2(String pool,
               String key,
               String value,
               int cachetype,
               String mimeType)

Deprecated. Temporary hack for solving asis problems (?). Use newput(String, HttpServletResponse, String, String, String) instead.

Store a file in the indicated pool's cache. Returns the old value if available.

Parameters:

pool - name of the cache pool

key - key under which the content was cached

value - content to store

cachetype - only needed for cachepool "PAGE". If 0, no file transfer is performed. Otherwise the NetFileSrv builder is invoked to start the VWM that handles the transfer.

mimeType - the page's mime type, only needed for cachepool "PAGE"

Returns:

the old cached content as a string, or null if no entry was found

remove

void remove(String poolName,
            String key)

Removes an entry from the cache pool.

Parameters:

poolName - name of cache pool

key - key of the content to remove