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explorer.go
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/
explorer.go
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// Copyright 2013, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package zktopo
import (
"net/http"
"sort"
"github.com/youtube/vitess/go/vt/vtctld/explorer"
"github.com/youtube/vitess/go/zk"
)
// ZkExplorer implements explorer.Explorer
type ZkExplorer struct {
zconn zk.Conn
}
// NewZkExplorer returns an Explorer implementation for Zookeeper
func NewZkExplorer(zconn zk.Conn) *ZkExplorer {
return &ZkExplorer{zconn}
}
// HandlePath is part of the Explorer interface
func (ex ZkExplorer) HandlePath(zkPath string, r *http.Request) *explorer.Result {
result := &explorer.Result{}
if zkPath == "/" {
cells, err := zk.ResolveWildcards(ex.zconn, []string{"/zk/*"})
if err != nil {
result.Error = err.Error()
return result
}
for i, cell := range cells {
cells[i] = cell[4:] // cut off "/zk/"
}
result.Children = cells
sort.Strings(result.Children)
return result
}
zkPath = "/zk" + zkPath
data, _, err := ex.zconn.Get(zkPath)
if err != nil {
result.Error = err.Error()
return result
}
result.Data = data
children, _, err := ex.zconn.Children(zkPath)
if err != nil {
result.Error = err.Error()
return result
}
result.Children = children
sort.Strings(result.Children)
return result
}