org.asunder
Class AsunderCache

java.lang.Object
  org.asunder.AsunderCache

All Implemented Interfaces:

DHTCache

public class AsunderCache
extends java.lang.Object
implements DHTCache

Author:

simms2k

Constructor Summary

AsunderCache(Id center, Environment env, java.lang.String rootDir, AsunderConfig config)

AsunderCache(Id center, Environment env, java.lang.String rootDir, AsunderConfig config, AsunderLogger logger)
Creates a new instance of AsunderCache

Method Summary

long	capacity()
int	getAcceptanceFactor()
boolean	haveContent(DHTContentKey contentKey) Checks if the content for this key is already stored
void	loadContent(DHTContentKey contentKey, DHTContinuation cmd) Retrieve content from storage.
void	openContentStream(DHTContentKey contentKey, DHTContinuation cmd) TODO
void	setAcceptanceFactor(int factor)
void	storeContent(DHTContent content, DHTContinuation cmd) Non-forcing version of storeContent (follows policies)
void	storeContent(DHTContent content, DHTContinuation cmd, boolean force) Write the content to disk
long	usage()
boolean	wantContent(DHTContentKey contentKey) this is a non-deterministic method! Probability of returning true increases as contentKey approaches center

Methods inherited from class java.lang.Object

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

Constructor Detail

AsunderCache

public AsunderCache(Id center,
                    Environment env,
                    java.lang.String rootDir,
                    AsunderConfig config)
             throws java.io.IOException

Throws:

java.io.IOException

AsunderCache

public AsunderCache(Id center,
                    Environment env,
                    java.lang.String rootDir,
                    AsunderConfig config,
                    AsunderLogger logger)
             throws java.io.IOException

Creates a new instance of AsunderCache

Throws:

java.io.IOException

Method Detail

setAcceptanceFactor

public void setAcceptanceFactor(int factor)

getAcceptanceFactor

public int getAcceptanceFactor()

capacity

public long capacity()

usage

public long usage()

wantContent

public boolean wantContent(DHTContentKey contentKey)

this is a non-deterministic method! Probability of returning true increases as contentKey approaches center

Specified by:

wantContent in interface DHTCache

Parameters:

contentKey - key for the content to potentially store

Returns:

whether the cache would like to store this content

haveContent

public boolean haveContent(DHTContentKey contentKey)

Checks if the content for this key is already stored

Parameters:

contentKey - the key to check for

storeContent

public void storeContent(DHTContent content,
                         DHTContinuation cmd,
                         boolean force)

Write the content to disk

Parameters:

content - the content to store

force - whether to save the content regardless of policies

cmd - command to run on completion

storeContent

public void storeContent(DHTContent content,
                         DHTContinuation cmd)

Non-forcing version of storeContent (follows policies)

Specified by:

storeContent in interface DHTCache

loadContent

public void loadContent(DHTContentKey contentKey,
                        DHTContinuation cmd)

Retrieve content from storage. Content is passed to cmd on success

Specified by:

loadContent in interface DHTCache

Parameters:

contenKey - the key of the content to retrieve

cmd - command to run on completion

openContentStream

public void openContentStream(DHTContentKey contentKey,
                              DHTContinuation cmd)

TODO

Specified by:

openContentStream in interface DHTCache