Package org.apache.hc.client5.http.impl.cache.memcached

Class SHA256KeyHashingScheme

java.lang.Object

org.apache.hc.client5.http.impl.cache.memcached.SHA256KeyHashingScheme

All Implemented Interfaces:

KeyHashingScheme

public final class SHA256KeyHashingScheme
extends Object
implements KeyHashingScheme

This is a KeyHashingScheme based on the SHA-256 algorithm. The hashes produced are hex-encoded SHA-256 digests and hence are always 64-character hexadecimal strings.

Since:

4.1

Field Summary

Fields

Modifier and Type	Field	Description
static final SHA256KeyHashingScheme	INSTANCE
private static final org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
SHA256KeyHashingScheme()

Method Summary

Modifier and Type	Method	Description
private MessageDigest	getDigest()
String	hash(String key)	Maps a storage key to a cache key.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final SHA256KeyHashingScheme INSTANCE

LOG

private static final org.slf4j.Logger LOG

Constructor Details

SHA256KeyHashingScheme

public SHA256KeyHashingScheme()

Method Details

hash

public String hash(String key)

Description copied from interface: KeyHashingScheme

Maps a storage key to a cache key. The storage key is what the higher-level HTTP cache uses as a key; the cache key is what we use as a key for talking to memcached.

Specified by:

hash in interface KeyHashingScheme

Parameters:

key - what the higher-level HTTP cache wants to use as its key for looking up cache entries

Returns:

a cache key suitable for use with memcached

getDigest

private MessageDigest getDigest()