andrewslai.clj.persistence.filesystem — org.clojars.alai57/andrewslai 0.0.98

canonical-url clj

(canonical-url url)

DistributedFileSystem clj protocol

A distributed Filesystem. This has properties that are different from a normal filesystem.

For example, in a distributed filesystem we want to be able to build caching into the filesystem. When we ask for a file, we also want to be able to say 'Please don't actually send me the contents of the file if I have the most recent, up-to-date version'

get-file clj

(get-file _ path options)

Retrieve a single file

ls clj

(ls _ path options)

Like the unix ls command. Returns a collection of metadata from a path, without the contents

put-file clj

(put-file _ path input-stream metadata)

Put a file

does-not-exist-response clj

does-not-exist? clj

(does-not-exist? x)

folder? clj

(folder? url)

get clj

(get filesystem path)

(get filesystem path options)

md5 clj

(md5 s)

not-modified-response clj

There is an asymmetry in a distributed filesystem - when we try to get a resource, we don't always want the full resource back because it would take longer to send over the wire.

So we may have multiple ways to represent a resource - we can represent the raw resource, or we can say 'You already have the most recent version, use your copy'

not-modified? clj

(not-modified? x)

object clj

(object x)

An object in the distributed Filesystem. All objects must have a version

object-content clj

(object-content fs-object)

object-metadata clj

(object-metadata fs-object)

object-version clj

(object-version fs-object)

object? clj

(object? x)