Package com.bumptech.glide.load.engine

Class DiskCacheStrategy

java.lang.Object

com.bumptech.glide.load.engine.DiskCacheStrategy

public abstract class DiskCacheStrategy
extends java.lang.Object

Set of available caching strategies for media.

Field Summary

Fields

Modifier and Type	Field	Description
static DiskCacheStrategy	ALL	Caches remote data with both DATA and RESOURCE, and local data with RESOURCE only.
static DiskCacheStrategy	AUTOMATIC	Tries to intelligently choose a strategy based on the data source of the DataFetcher and the EncodeStrategy of the ResourceEncoder (if an ResourceEncoder is available).
static DiskCacheStrategy	DATA	Writes retrieved data directly to the disk cache before it's decoded.
static DiskCacheStrategy	NONE	Saves no data to cache.
static DiskCacheStrategy	RESOURCE	Writes resources to disk after they've been decoded.

Constructor Summary

Constructors

Constructor	Description
DiskCacheStrategy()

Method Summary

Modifier and Type	Method	Description
abstract boolean	decodeCachedData()	Returns true if this request should attempt to decode cached source data.
abstract boolean	decodeCachedResource()	Returns true if this request should attempt to decode cached resource data.
abstract boolean	isDataCacheable(DataSource dataSource)	Returns true if this request should cache the original unmodified data.
abstract boolean	isResourceCacheable(boolean isFromAlternateCacheKey, DataSource dataSource, EncodeStrategy encodeStrategy)	Returns true if this request should cache the final transformed resource.

Methods inherited from class java.lang.Object

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

Field Detail

ALL

public static final DiskCacheStrategy ALL

Caches remote data with both DATA and RESOURCE, and local data with RESOURCE only.

NONE

public static final DiskCacheStrategy NONE

Saves no data to cache.

DATA

public static final DiskCacheStrategy DATA

Writes retrieved data directly to the disk cache before it's decoded.

RESOURCE

public static final DiskCacheStrategy RESOURCE

Writes resources to disk after they've been decoded.

AUTOMATIC

public static final DiskCacheStrategy AUTOMATIC

Tries to intelligently choose a strategy based on the data source of the DataFetcher and the EncodeStrategy of the ResourceEncoder (if an ResourceEncoder is available).

Constructor Detail

DiskCacheStrategy

public DiskCacheStrategy()

Method Detail

isDataCacheable

public abstract boolean isDataCacheable(DataSource dataSource)

Returns true if this request should cache the original unmodified data.

Parameters:

dataSource - Indicates where the data was originally retrieved.

isResourceCacheable

public abstract boolean isResourceCacheable(boolean isFromAlternateCacheKey,
                                            DataSource dataSource,
                                            EncodeStrategy encodeStrategy)

Returns true if this request should cache the final transformed resource.

Parameters:

isFromAlternateCacheKey - true if the resource we've decoded was loaded using an alternative, rather than the primary, cache key.

dataSource - Indicates where the data used to decode the resource was originally retrieved.

encodeStrategy - The EncodeStrategy the ResourceEncoder will use to encode the resource.

decodeCachedResource

public abstract boolean decodeCachedResource()

Returns true if this request should attempt to decode cached resource data.

decodeCachedData

public abstract boolean decodeCachedData()

Returns true if this request should attempt to decode cached source data.