203d866643
This adds a new set of methods to the World API (for sharing data throughout the cluster) and adds an etcd backed implementation.
65 lines
2.6 KiB
Go
65 lines
2.6 KiB
Go
// Mgmt
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// Copyright (C) 2013-2017+ James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package etcd
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import (
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"github.com/purpleidea/mgmt/resources"
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)
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// World is an etcd backed implementation of the World interface.
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type World struct {
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Hostname string // uuid for the consumer of these
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EmbdEtcd *EmbdEtcd
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}
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// ResExport exports a list of resources under our hostname namespace.
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// Subsequent calls replace the previously set collection atomically.
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func (obj *World) ResExport(resourceList []resources.Res) error {
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return SetResources(obj.EmbdEtcd, obj.Hostname, resourceList)
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}
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// ResCollect gets the collection of exported resources which match the filter.
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// It does this atomically so that a call always returns a complete collection.
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func (obj *World) ResCollect(hostnameFilter, kindFilter []string) ([]resources.Res, error) {
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// XXX: should we be restricted to retrieving resources that were
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// exported with a tag that allows or restricts our hostname? We could
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// enforce that here if the underlying API supported it... Add this?
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return GetResources(obj.EmbdEtcd, hostnameFilter, kindFilter)
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}
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// SetWatch returns a channel which spits out events on possible string changes.
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func (obj *World) StrWatch(namespace string) chan error {
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return WatchStr(obj.EmbdEtcd, namespace)
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}
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// StrGet returns a map of hostnames to values in the given namespace.
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func (obj *World) StrGet(namespace string) (map[string]string, error) {
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return GetStr(obj.EmbdEtcd, []string{}, namespace)
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}
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// StrSet sets the namespace value to a particular string under the identity of
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// its own hostname.
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func (obj *World) StrSet(namespace, value string) error {
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return SetStr(obj.EmbdEtcd, obj.Hostname, namespace, &value)
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}
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// StrDel deletes the value in a particular namespace.
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func (obj *World) StrDel(namespace string) error {
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return SetStr(obj.EmbdEtcd, obj.Hostname, namespace, nil)
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}
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