61 lines
1.4 KiB
Ruby
Executable file
61 lines
1.4 KiB
Ruby
Executable file
#
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# Author:: Anders Bengtsson <ndrsbngtssn@yahoo.se>
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# Copyright:: Copyright (c) 2004
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#
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require 'zlib'
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module Madeleine
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#
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# Snapshot marshaller for compressed snapshots.
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#
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# Compresses the snapshots created by another marshaller. Uses either
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# Marshal (the default) or another supplied marshaller.
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#
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# Uses <tt>zlib</tt> to do on-the-fly compression/decompression.
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#
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# ZMarshal works with Ruby's own Marshal and YAML, but not with SOAP
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# marshalling.
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#
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# Usage:
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#
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# require 'madeleine'
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# require 'madeleine/zmarshal'
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#
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# marshaller = Madeleine::ZMarshal.new(YAML)
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# madeleine = SnapshotMadeleine.new("my_example_storage", marshaller) {
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# SomeExampleApplication.new()
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# }
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#
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class ZMarshal
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def initialize(marshaller=Marshal)
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@marshaller = marshaller
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end
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def load(stream)
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zstream = Zlib::GzipReader.new(stream)
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begin
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# Buffer into a string first, since GzipReader can't handle
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# Marshal's 0-sized reads and SOAP can't handle streams at all.
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# In a bright future we can revert to reading directly from the
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# stream again.
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buffer = zstream.read
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return @marshaller.load(buffer)
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ensure
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zstream.finish
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end
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end
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def dump(system, stream)
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zstream = Zlib::GzipWriter.new(stream)
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begin
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@marshaller.dump(system, zstream)
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ensure
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zstream.finish
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end
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nil
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end
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end
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end
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