25 lines
539 B
Crystal
25 lines
539 B
Crystal
module DB
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# Generic module to encapsulate disposable db resources.
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module Disposable
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macro included
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@closed = false
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end
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# Closes this object.
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def close
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return if @closed
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do_close
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@closed = true
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end
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# Returns `true` if this object is closed. See `#close`.
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def closed?
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@closed
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end
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# Implementors overrides this method to perform resource cleanup
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# If an exception is raised, the resource will not be marked as closed.
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protected abstract def do_close
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end
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end
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