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https://gitea.elkins.co/Networking/ccl.git
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Joel D. Elkins
74bbc9dad8
Any container definitions in ccl.toml can be given a `start_order` tag (integer). It is recommended to not put a start_order unless a container depends on another one (e.g. synapse needs postgres), in which case all dependents and dependees should be given a `start_order`, with dependees having a lower number than their dependents. It is guaranteed that the dependees will be started first, although the container startup procedure is outside of our control. Containers without a `start_order` will have their operations applied asynchronously, but those with a start order are started, well, in order from lowest to highest. "Stop" operations are applied in the reverse order.
62 lines
1.8 KiB
Go
62 lines
1.8 KiB
Go
/*
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Copyright © 2022 Joel D. Elkins <joel@elkins.co>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package container
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import "golang.org/x/exp/slices"
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type operation bool
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const (
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Start operation = true
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Stop operation = false
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)
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func Reorder(conts []Container, op operation) {
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// null orderings go first for either start or stop, as they are executed asynchronously
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norm := func(a, b Container) bool {
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if !a.StartOrder.Valid {
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return true
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}
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if !b.StartOrder.Valid {
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return false
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}
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return a.StartOrder.ValueOrZero() < b.StartOrder.ValueOrZero()
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}
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rev := func(a, b Container) bool {
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if !a.StartOrder.Valid {
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return true
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}
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if !b.StartOrder.Valid {
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return false
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}
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return b.StartOrder.ValueOrZero() > a.StartOrder.ValueOrZero()
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}
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var sorter func(a, b Container) bool
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if op == Start {
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sorter = norm
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} else {
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sorter = rev
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}
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slices.SortFunc(conts, sorter)
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}
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