thodg/cl-unix-cybernetics/core/resource.lisp

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• Hash : 34f3771c
  Author :
  Date : 2014-11-03T17:33:27
  

  Refactor code into modules. Implement SPECIFY macro.

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• core/resource.lisp

• ;;
  ;;  adams  -  Remote system administration tools
  ;;
  ;;  Copyright 2013,2014 Thomas de Grivel <thomas@lowh.net>
  ;;
  ;;  Permission to use, copy, modify, and distribute this software for any
  ;;  purpose with or without fee is hereby granted, provided that the above
  ;;  copyright notice and this permission notice appear in all copies.
  ;;
  ;;  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  ;;  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  ;;  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ;;  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  ;;  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ;;  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  ;;  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  ;;
  
  (in-package :adams)
  
  ;;  Resource metaclass
  
  (defmethod closer-mop:finalize-inheritance :after ((rc resource-class))
    (setf (slot-value rc 'probes)
  	(compute-probes rc)))
  
  ;;  Resource
  
  (defmethod print-object ((r resource) stream)
    (print-unreadable-object (r stream :type t :identity (not *print-pretty*))
      (format stream "~S ~D spec ~D probed" (resource-id r)
  	    (/ (length (specified-properties r)) 2)
  	    (/ (length (probed-properties r)) 2))))
  
  (defun make-resource (type id &rest initargs &key &allow-other-keys)
    (apply #'make-instance type :id id initargs))
  
  (defun resource-type (resource)
    (class-name (class-of resource)))
  
  ;;  Resource tree
  
  (defmethod print-object ((r resource-tree) stream)
    (print-unreadable-object (r stream :type t :identity (not *print-pretty*))
      (format stream "~S ~D spec ~D probed ~D nested" (resource-id r)
  	    (/ (length (specified-properties r)) 2)
  	    (/ (length (probed-properties r)) 2)
  	    (hash-table-count (resources-of r)))))
  
  ;;  High level API
  
  (defmacro get-resource (type id &optional (resources '*resources*))
    `(gethash (cons ,type ,id) ,resources))
  
  (defun add-resource (parent child)
    (setf (get-resource (resource-type child) (resource-id child)
  		      (resources-of parent))
  	child))
  

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