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client.go
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client.go
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// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 client
import (
"fmt"
"net"
"github.com/golang/glog"
)
type Client struct {
HostPort string
Namespace string
conn net.Conn
}
func (self *Client) Open() error {
conn, err := net.Dial("udp", self.HostPort)
if err != nil {
glog.Errorf("failed to open udp connection to %q: %v", self.HostPort, err)
return err
}
self.conn = conn
return nil
}
func (self *Client) Close() error {
self.conn.Close()
self.conn = nil
return nil
}
// Simple send to statsd daemon without sampling.
func (self *Client) Send(namespace, containerName, key string, value uint64) error {
// only send counter value
formatted := fmt.Sprintf("%s.%s.%s:%d|g", namespace, containerName, key, value)
_, err := fmt.Fprintf(self.conn, formatted)
if err != nil {
glog.V(3).Infof("failed to send data %q: %v", formatted, err)
return err
}
return nil
}
func New(hostPort string) (*Client, error) {
Client := Client{HostPort: hostPort}
if err := Client.Open(); err != nil {
return nil, err
}
return &Client, nil
}