b19583e7d3
This is an initial implementation of the mgmt language. It is a declarative (immutable) functional, reactive, domain specific programming language. It is intended to be a language that is: * safe * powerful * easy to reason about With these properties, we hope this language, and the mgmt engine will allow you to model the real-time systems that you'd like to automate. This also includes a number of other associated changes. Sorry for the large size of this patch.
90 lines
3.6 KiB
Go
90 lines
3.6 KiB
Go
// Mgmt
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// Copyright (C) 2013-2018+ 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 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package resources
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import (
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"os"
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"github.com/purpleidea/mgmt/etcd/scheduler"
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"github.com/spf13/afero"
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)
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// World is an interface to the rest of the different graph state. It allows
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// the GAPI to store state and exchange information throughout the cluster. It
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// is the interface each machine uses to communicate with the rest of the world.
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type World interface { // TODO: is there a better name for this interface?
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ResWatch() chan error
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ResExport([]Res) error
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// FIXME: should this method take a "filter" data struct instead of many args?
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ResCollect(hostnameFilter, kindFilter []string) ([]Res, error)
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StrWatch(namespace string) chan error
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StrIsNotExist(error) bool
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StrGet(namespace string) (string, error)
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StrSet(namespace, value string) error
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StrDel(namespace string) error
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// XXX: add the exchange primitives in here directly?
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StrMapWatch(namespace string) chan error
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StrMapGet(namespace string) (map[string]string, error)
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StrMapSet(namespace, value string) error
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StrMapDel(namespace string) error
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Scheduler(namespace string, opts ...scheduler.Option) (*scheduler.Result, error)
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Fs(uri string) (Fs, error)
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}
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// from the ioutil package:
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// NopCloser(r io.Reader) io.ReadCloser // not implemented here
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// ReadAll(r io.Reader) ([]byte, error)
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// ReadDir(dirname string) ([]os.FileInfo, error)
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// ReadFile(filename string) ([]byte, error)
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// TempDir(dir, prefix string) (name string, err error)
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// TempFile(dir, prefix string) (f *os.File, err error) // slightly different here
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// WriteFile(filename string, data []byte, perm os.FileMode) error
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// Fs is an interface that represents this file system API that we support.
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// TODO: this should be in the gapi package or elsewhere.
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type Fs interface {
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//fmt.Stringer // TODO: add this method?
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afero.Fs // TODO: why doesn't this interface exist in the os pkg?
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URI() string // returns the URI for this file system
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//DirExists(path string) (bool, error)
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//Exists(path string) (bool, error)
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//FileContainsAnyBytes(filename string, subslices [][]byte) (bool, error)
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//FileContainsBytes(filename string, subslice []byte) (bool, error)
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//FullBaseFsPath(basePathFs *BasePathFs, relativePath string) string
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//GetTempDir(subPath string) string
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//IsDir(path string) (bool, error)
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//IsEmpty(path string) (bool, error)
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//NeuterAccents(s string) string
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//ReadAll(r io.Reader) ([]byte, error) // not needed
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ReadDir(dirname string) ([]os.FileInfo, error)
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ReadFile(filename string) ([]byte, error)
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//SafeWriteReader(path string, r io.Reader) (err error)
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TempDir(dir, prefix string) (name string, err error)
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TempFile(dir, prefix string) (f afero.File, err error) // slightly different from upstream
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//UnicodeSanitize(s string) string
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//Walk(root string, walkFn filepath.WalkFunc) error
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WriteFile(filename string, data []byte, perm os.FileMode) error
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//WriteReader(path string, r io.Reader) (err error)
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}
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