Class: Thingfish::Datastore::Filesystem

Inherits:
Thingfish::Datastore
  • Object
show all
Extended by:
Configurability, Loggability, Strelka::MethodUtilities, Normalization
Defined in:
lib/thingfish/datastore/filesystem.rb

Overview

A hashed-directory hierarchy filesystem datastore for Thingfish

Constant Summary collapse

VERSION =

Package version

'0.2.0'
REVISION =

Version control revision

%q$Revision: cb4954dd5c6e $
HASH_DEPTH =

The number of subdirectories to use in the hashed directory tree. Must be 2, 4, or 8

4

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Filesystem

Create a new Filesystem Datastore.



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# File 'lib/thingfish/datastore/filesystem.rb', line 46

def initialize
  super
  @root_path = self.class.root_path
end

Instance Attribute Details

#root_path ⇒ Object (readonly)

The root path of the datastore



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# File 'lib/thingfish/datastore/filesystem.rb', line 58

def root_path
  @root_path
end

Instance Method Details

#fetch(oid) ⇒ Object

Fetch the data corresponding to the given oid as an IOish object.



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# File 'lib/thingfish/datastore/filesystem.rb', line 77

def fetch( oid )
  return self.retrieve( oid )
end

#include?(oid) ⇒ Boolean

Returns true if the datastore has a file for the specified oid.

Returns:

  • (Boolean) 


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# File 'lib/thingfish/datastore/filesystem.rb', line 83

def include?( oid )
  return self.hashed_path( oid ).exist?
end

#remove(oid) ⇒ Object

Remove the data associated with oid from the Datastore.



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# File 'lib/thingfish/datastore/filesystem.rb', line 89

def remove( oid )
  return self.hashed_path( oid ).unlink
end

#replace(oid, io) ⇒ Object

Replace the existing object associated with oid with the data read from the given io.



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# File 'lib/thingfish/datastore/filesystem.rb', line 96

def replace( oid, io )
  pos = io.pos
  self.store( oid, io )

  return true
ensure
  io.pos = pos if pos
end

#save(io) ⇒ Object

Save the data read from the specified io and return an ID that can be used to fetch it later.



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# File 'lib/thingfish/datastore/filesystem.rb', line 64

def save( io )
  oid = make_object_id()

  pos = io.pos
  self.store( oid, io )

  return oid
ensure
  io.pos = pos if pos
end