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class CacheReader extends AnyRef

Reads image content from the cache.

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Instance Constructors

  1. new CacheReader(cache: Cache)

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  1. final def !=(arg0: Any): Boolean
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  9. final def getClass(): Class[_]
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  10. def getLayer(layerDigest: DescriptorDigest): CachedLayer

    layerDigest

    the layer digest of the layer to get.

    returns

    the cached layer with digest layerDigest, or null if not found.

  11. def getLayerFile(layerEntries: ImmutableList[LayerEntry]): Path

    Finds the file that stores the content BLOB for an application layer.

    Finds the file that stores the content BLOB for an application layer.

    layerEntries

    the entries for the layer content

    returns

    the newest cached layer file that matches the layerType and sourceFiles, or null if there is no match.

    Exceptions thrown

    CacheMetadataCorruptedException if getting the cache metadata fails.

  12. def getUpToDateLayerByLayerEntries(layerEntries: ImmutableList[LayerEntry]): CachedLayerWithMetadata

    Gets an up-to-date layer that is built from the sourceFiles.

    Gets an up-to-date layer that is built from the sourceFiles.

    The method returns the first up-to-date layer found. This is safe because the source files will not have been modified since creation of any up-to-date layer (ie. all up-to-date layers should have the same file contents).

    layerEntries

    the layer's content entries

    returns

    an up-to-date layer containing the source files.

    Exceptions thrown

    CacheMetadataCorruptedException if reading the cache metadata fails.

    IOException if reading the source files fails.

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