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opentsdb.go
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opentsdb.go
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// Copyright 2017 Xiaomi, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pools
import (
"fmt"
"net"
"time"
connp "github.com/toolkits/pkg/pool"
)
type OpenTsdbClient struct {
cli *struct{ net.Conn }
name string
}
func (t OpenTsdbClient) Name() string {
return t.name
}
func (t OpenTsdbClient) Closed() bool {
return t.cli.Conn == nil
}
func (t OpenTsdbClient) Close() error {
if t.cli != nil {
err := t.cli.Close()
t.cli.Conn = nil
return err
}
return nil
}
func newOpenTsdbConnPool(address string, maxConns int, maxIdle int, connTimeout int) *connp.ConnPool {
pool := connp.NewConnPool("opentsdb", address, maxConns, maxIdle)
pool.New = func(name string) (connp.NConn, error) {
_, err := net.ResolveTCPAddr("tcp", address)
if err != nil {
return nil, err
}
conn, err := net.DialTimeout("tcp", address, time.Duration(connTimeout)*time.Millisecond)
if err != nil {
return nil, err
}
return OpenTsdbClient{
cli: &struct{ net.Conn }{conn},
name: name,
}, nil
}
return pool
}
type OpenTsdbConnPoolHelper struct {
p *connp.ConnPool
maxConns int
maxIdle int
connTimeout int
callTimeout int
address string
}
func NewOpenTsdbConnPoolHelper(address string, maxConns, maxIdle, connTimeout, callTimeout int) *OpenTsdbConnPoolHelper {
return &OpenTsdbConnPoolHelper{
p: newOpenTsdbConnPool(address, maxConns, maxIdle, connTimeout),
maxConns: maxConns,
maxIdle: maxIdle,
connTimeout: connTimeout,
callTimeout: callTimeout,
address: address,
}
}
func (t *OpenTsdbConnPoolHelper) Send(data []byte) (err error) {
conn, err := t.p.Fetch()
if err != nil {
return fmt.Errorf("get connection fail: err %v. proc: %s", err, t.p.Proc())
}
cli := conn.(OpenTsdbClient).cli
done := make(chan error, 1)
go func() {
_, err = cli.Write(data)
done <- err
}()
select {
case <-time.After(time.Duration(t.callTimeout) * time.Millisecond):
t.p.ForceClose(conn)
return fmt.Errorf("%s, call timeout", t.address)
case err = <-done:
if err != nil {
t.p.ForceClose(conn)
err = fmt.Errorf("%s, call failed, err %v. proc: %s", t.address, err, t.p.Proc())
} else {
t.p.Release(conn)
}
return err
}
}