forked from tsuna/gohbase
/
test.go
112 lines (96 loc) · 2.98 KB
/
test.go
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// Copyright (C) 2015 The GoHBase Authors. All rights reserved.
// This file is part of GoHBase.
// Use of this source code is governed by the Apache License 2.0
// that can be found in the COPYING file.
package test
import (
"bytes"
"errors"
"io"
"os"
"os/exec"
"path"
"strings"
"github.com/tsuna/gohbase"
"github.com/tsuna/gohbase/hrpc"
"golang.org/x/net/context"
)
// This error is returned when the HBASE_HOME environment variable is unset
var ErrHomeUnset = errors.New("Environment variable HBASE_HOME is not set")
// getShellCmd returns a new shell subprocess (already started) along with its
// stdin
func getShellCmd() (*exec.Cmd, io.WriteCloser, error) {
hbaseHome := os.Getenv("HBASE_HOME")
if len(hbaseHome) == 0 {
return nil, nil, ErrHomeUnset
}
hbaseShell := path.Join(hbaseHome, "bin", "hbase")
cmd := exec.Command(hbaseShell, "shell")
stdin, err := cmd.StdinPipe()
if err != nil {
return nil, nil, err
}
err = cmd.Start()
if err != nil {
stdin.Close()
return nil, nil, err
}
return cmd, stdin, nil
}
// CreateTable finds the HBase shell via the HBASE_HOME environment variable,
// and creates the given table with the given families
func CreateTable(host, table string, cFamilies []string) error {
// If the table exists, delete it
DeleteTable(host, table)
// Don't check the error, since one will be returned if the table doesn't
// exist
cmd, stdin, err := getShellCmd()
if err != nil {
return err
}
var buf bytes.Buffer
buf.WriteString("create '" + table + "'")
for _, f := range cFamilies {
buf.WriteString(", '")
buf.WriteString(f)
buf.WriteString("'")
}
buf.WriteString("\n")
stdin.Write(buf.Bytes())
stdin.Write([]byte("exit\n"))
return cmd.Wait()
}
// DeleteTable finds the HBase shell via the HBASE_HOME environment variable,
// and disables and drops the given table
func DeleteTable(host, table string) error {
// TODO: We leak this client.
ac := gohbase.NewClient(host, gohbase.Admin())
dit := hrpc.NewDisableTable(context.Background(), []byte(table))
_, err := ac.SendRPC(dit)
if err != nil {
if !strings.Contains(err.Error(), "TableNotEnabledException") {
return err
}
}
det := hrpc.NewDeleteTable(context.Background(), []byte(table))
_, err = ac.SendRPC(det)
if err != nil {
return err
}
return nil
}
// LaunchRegionServers uses the script local-regionservers.sh to create new
// RegionServers. Fails silently if server already exists.
// Ex. LaunchRegions([]string{"2", "3"}) launches two servers with id=2,3
func LaunchRegionServers(servers []string) {
hh := os.Getenv("HBASE_HOME")
servers = append([]string{"start"}, servers...)
exec.Command(hh+"/bin/local-regionservers.sh", servers...).Run()
}
// StopRegionServers uses the script local-regionservers.sh to stop existing
// RegionServers. Fails silently if server isn't running.
func StopRegionServers(servers []string) {
hh := os.Getenv("HBASE_HOME")
servers = append([]string{"stop"}, servers...)
exec.Command(hh+"/bin/local-regionservers.sh", servers...).Run()
}