forked from mirror/ledisdb
119 lines
2.0 KiB
Go
119 lines
2.0 KiB
Go
package server
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import (
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"fmt"
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"github.com/siddontang/go-snappy/snappy"
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"github.com/siddontang/ledisdb/ledis"
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"io/ioutil"
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"os"
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"strconv"
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"strings"
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)
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func slaveofCommand(c *client) error {
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args := c.args
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if len(args) != 2 {
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return ErrCmdParams
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}
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masterAddr := ""
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if strings.ToLower(ledis.String(args[0])) == "no" &&
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strings.ToLower(ledis.String(args[1])) == "one" {
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//stop replication, use master = ""
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} else {
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if _, err := strconv.ParseInt(ledis.String(args[1]), 10, 16); err != nil {
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return err
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}
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masterAddr = fmt.Sprintf("%s:%s", args[0], args[1])
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}
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if err := c.app.slaveof(masterAddr); err != nil {
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return err
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}
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c.resp.writeStatus(OK)
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return nil
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}
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func fullsyncCommand(c *client) error {
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//todo, multi fullsync may use same dump file
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dumpFile, err := ioutil.TempFile(c.app.cfg.DataDir, "dump_")
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if err != nil {
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return err
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}
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if err = c.app.ldb.Dump(dumpFile); err != nil {
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return err
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}
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st, _ := dumpFile.Stat()
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n := st.Size()
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dumpFile.Seek(0, os.SEEK_SET)
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c.resp.writeBulkFrom(n, dumpFile)
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name := dumpFile.Name()
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dumpFile.Close()
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os.Remove(name)
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return nil
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}
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func syncCommand(c *client) error {
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args := c.args
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if len(args) != 1 {
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return ErrCmdParams
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}
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var logId uint64
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var err error
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if logId, err = ledis.StrUint64(args[0], nil); err != nil {
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return ErrCmdParams
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}
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c.lastSyncLogID = logId - 1
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if c.ack != nil && logId > c.ack.id {
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select {
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case c.ack.ch <- logId:
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default:
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}
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c.ack = nil
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}
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c.syncBuf.Reset()
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if _, _, err := c.app.ldb.ReadLogsToTimeout(logId, &c.syncBuf, 30); err != nil {
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return err
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} else {
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buf := c.syncBuf.Bytes()
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if len(c.compressBuf) < snappy.MaxEncodedLen(len(buf)) {
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c.compressBuf = make([]byte, snappy.MaxEncodedLen(len(buf)))
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}
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if buf, err = snappy.Encode(c.compressBuf, buf); err != nil {
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return err
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}
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c.resp.writeBulk(buf)
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}
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c.app.addSlave(c)
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return nil
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}
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func init() {
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register("slaveof", slaveofCommand)
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register("fullsync", fullsyncCommand)
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register("sync", syncCommand)
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}
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