Files
mgmt/engine/traits/reverse.go
James Shubin 253ed78cc6 engine: Rewrite the core algorithm
The engine core had some unfortunate bugs that were the result of some
early design errors when I wasn't as familiar with channels. I've
finally rewritten most of the bad parts, and I think it's much more
logical and stable now.

This also simplifies the resource API, since more of the work is done
completely in the engine, and hidden from view.

Lastly, this adds a few new metaparameters and associated code.

There are still some open problems left to solve, but hopefully this
brings us one step closer.
2019-02-24 12:28:59 -05:00

49 lines
1.7 KiB
Go

// Mgmt
// Copyright (C) 2013-2018+ James Shubin and the project contributors
// Written by James Shubin <james@shubin.ca> and the project contributors
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package traits
import (
"github.com/purpleidea/mgmt/engine"
)
// Reversible contains a general implementation with most of the properties and
// methods needed to support reversing resources. It may be used as a starting
// point to avoid re-implementing the straightforward methods.
type Reversible struct {
meta *engine.ReversibleMeta
// Bug5819 works around issue https://github.com/golang/go/issues/5819
Bug5819 interface{} // XXX: workaround
}
// ReversibleMeta lets you get or set meta params for the reversing trait.
func (obj *Reversible) ReversibleMeta() *engine.ReversibleMeta {
if obj.meta == nil { // set the defaults if previously empty
obj.meta = &engine.ReversibleMeta{
Disabled: true, // by default we're disabled
}
}
return obj.meta
}
// SetReversibleMeta lets you set all of the meta params for the reversing trait
// in a single call.
func (obj *Reversible) SetReversibleMeta(meta *engine.ReversibleMeta) {
obj.meta = meta
}