mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
116 lines
3.1 KiB
Go
116 lines
3.1 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package command
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import (
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"errors"
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"fmt"
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"os"
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"strings"
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"github.com/coreos/etcd/Godeps/_workspace/src/github.com/codegangsta/cli"
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"github.com/coreos/etcd/Godeps/_workspace/src/github.com/coreos/go-etcd/etcd"
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)
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type handlerFunc func(*cli.Context, *etcd.Client) (*etcd.Response, error)
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type printFunc func(*etcd.Response, string)
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type contextualPrintFunc func(*cli.Context, *etcd.Response, string)
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// dumpCURL blindly dumps all curl output to os.Stderr
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func dumpCURL(client *etcd.Client) {
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client.OpenCURL()
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for {
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fmt.Fprintf(os.Stderr, "Curl-Example: %s\n", client.RecvCURL())
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}
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}
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// rawhandle wraps the command function handlers and sets up the
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// environment but performs no output formatting.
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func rawhandle(c *cli.Context, fn handlerFunc) (*etcd.Response, error) {
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endpoints, err := getEndpoints(c)
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if err != nil {
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return nil, err
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}
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tr, err := getTransport(c)
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if err != nil {
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return nil, err
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}
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client := etcd.NewClient(endpoints)
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client.SetTransport(tr)
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if c.GlobalBool("debug") {
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go dumpCURL(client)
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}
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// Sync cluster.
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if !c.GlobalBool("no-sync") {
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if ok := client.SyncCluster(); !ok {
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handleError(ExitBadConnection, errors.New("cannot sync with the cluster using endpoints "+strings.Join(endpoints, ", ")))
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}
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}
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if c.GlobalBool("debug") {
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fmt.Fprintf(os.Stderr, "Cluster-Endpoints: %s\n", strings.Join(client.GetCluster(), ", "))
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}
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// Execute handler function.
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return fn(c, client)
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}
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// handlePrint wraps the command function handlers to parse global flags
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// into a client and to properly format the response objects.
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func handlePrint(c *cli.Context, fn handlerFunc, pFn printFunc) {
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resp, err := rawhandle(c, fn)
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// Print error and exit, if necessary.
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if err != nil {
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handleError(ExitServerError, err)
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}
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if resp != nil && pFn != nil {
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pFn(resp, c.GlobalString("output"))
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}
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}
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// Just like handlePrint but also passed the context of the command
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func handleContextualPrint(c *cli.Context, fn handlerFunc, pFn contextualPrintFunc) {
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resp, err := rawhandle(c, fn)
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if err != nil {
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handleError(ExitServerError, err)
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}
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if resp != nil && pFn != nil {
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pFn(c, resp, c.GlobalString("output"))
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}
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}
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// handleDir handles a request that wants to do operations on a single dir.
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// Dir cannot be printed out, so we set NIL print function here.
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func handleDir(c *cli.Context, fn handlerFunc) {
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handlePrint(c, fn, nil)
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}
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// handleKey handles a request that wants to do operations on a single key.
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func handleKey(c *cli.Context, fn handlerFunc) {
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handlePrint(c, fn, printKey)
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}
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func handleAll(c *cli.Context, fn handlerFunc) {
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handlePrint(c, fn, printAll)
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}
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