org.wandora.piccolo.services

Class MemoryCache

java.lang.Object

org.wandora.piccolo.services.MemoryCache

All Implemented Interfaces:

Service, PageCacheService, XMLParamAware

public class MemoryCache
extends java.lang.Object
implements PageCacheService, XMLParamAware

Page cache that stores pages in memory. Note that this isn't actually very much faster than FileSystemCache. Probably has something to do with operating system disk caching. If the cache size would grow so large that all pages wouldn't fit in OS's disk cache, this might speed things up, but then again, storing the pages in memory would take huge amount of memory in that case.

Author:

olli

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	MemoryCache.PageInputStream
class	MemoryCache.PageOutputStream

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.HashMap	cached
private java.lang.String	cacheDir
private java.util.HashMap	locks
private Logger	logger
private java.util.HashMap	pages

Constructor Summary

Constructors

Constructor and Description
MemoryCache() Creates a new instance of FileSystemCache

Method Summary

Modifier and Type	Method and Description
private java.io.ByteArrayInputStream	getBAIS(java.lang.String key)
java.io.InputStream	getPage(java.lang.String key, long modifyTime)
java.lang.String	getServiceName()
java.lang.String	getServiceType()
private java.lang.String	makeFileName(java.lang.String key)
java.io.OutputStream	storePage(java.lang.String key, long modifyTime)
void	xmlParamInitialize(org.w3c.dom.Element element, XMLParamProcessor processor)

Methods inherited from class java.lang.Object

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

Field Detail

logger

private Logger logger

cached

private java.util.HashMap cached

cacheDir

private java.lang.String cacheDir

locks

private java.util.HashMap locks

pages

private java.util.HashMap pages

Constructor Detail

MemoryCache

public MemoryCache()

Creates a new instance of FileSystemCache

Method Detail

getPage

public java.io.InputStream getPage(java.lang.String key,
                                   long modifyTime)

Specified by:

getPage in interface PageCacheService

getServiceName

public java.lang.String getServiceName()

Specified by:

getServiceName in interface Service

getServiceType

public java.lang.String getServiceType()

Specified by:

getServiceType in interface Service

getBAIS

private java.io.ByteArrayInputStream getBAIS(java.lang.String key)

makeFileName

private java.lang.String makeFileName(java.lang.String key)

storePage

public java.io.OutputStream storePage(java.lang.String key,
                                      long modifyTime)

Specified by:

storePage in interface PageCacheService

xmlParamInitialize

public void xmlParamInitialize(org.w3c.dom.Element element,
                               XMLParamProcessor processor)

Specified by:

xmlParamInitialize in interface XMLParamAware