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  • Committer: Gustavo Niemeyer
  • Date: 2011-09-26 14:48:45 UTC
  • mto: This revision was merged to the branch mainline in revision 34.
  • Revision ID: gustavo@niemeyer.net-20110926144845-atwp3u6blqngmhel
Bootstrapping store package.

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state/life.go
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// Copyright 2012, 2013 Canonical Ltd.
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// Licensed under the AGPLv3, see LICENCE file for details.
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package state
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import (
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        "labix.org/v2/mgo"
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        "launchpad.net/juju-core/state/api/params"
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)
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// Life represents the lifecycle state of the entities
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// Relation, Unit, Service and Machine.
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type Life int8
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const (
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        Alive Life = iota
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        Dying
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        Dead
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        nLife
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)
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var lifeStrings = [nLife]params.Life{
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        Alive: params.Alive,
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        Dying: params.Dying,
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        Dead:  params.Dead,
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}
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func (l Life) String() string {
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        return string(lifeStrings[l])
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}
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var isAliveDoc = D{{"life", Alive}}
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var isDeadDoc = D{{"life", Dead}}
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var notDeadDoc = D{{"life", D{{"$ne", Dead}}}}
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// Living describes state entities with a lifecycle.
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type Living interface {
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        Life() Life
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        Destroy() error
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        EnsureDead() error
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        Refresh() error
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}
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func isAlive(coll *mgo.Collection, id interface{}) (bool, error) {
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        n, err := coll.Find(D{{"_id", id}, {"life", Alive}}).Count()
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        return n == 1, err
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}
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func isNotDead(coll *mgo.Collection, id interface{}) (bool, error) {
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        n, err := coll.Find(D{{"_id", id}, {"life", D{{"$ne", Dead}}}}).Count()
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        return n == 1, err
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}