/usr/share/gocode/src/github.com/google/cups-connector/monitor/monitor.go is in google-cloud-print-connector 0.0~git20151105.24.1902938-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | /*
Copyright 2015 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 or at
https://developers.google.com/open-source/licenses/bsd
*/
package monitor
import (
"fmt"
"net"
"github.com/google/cups-connector/cups"
"github.com/google/cups-connector/gcp"
"github.com/google/cups-connector/lib"
"github.com/google/cups-connector/log"
"github.com/google/cups-connector/manager"
"github.com/google/cups-connector/privet"
)
const monitorFormat = `cups-printers=%d
cups-raw-printers=%d
gcp-printers=%d
local-printers=%d
cups-conn-qty=%d
cups-conn-max-qty=%d
jobs-done=%d
jobs-error=%d
jobs-in-progress=%d
`
type Monitor struct {
cups *cups.CUPS
gcp *gcp.GoogleCloudPrint
p *privet.Privet
pm *manager.PrinterManager
listenerQuit chan bool
}
func NewMonitor(cups *cups.CUPS, gcp *gcp.GoogleCloudPrint, p *privet.Privet, pm *manager.PrinterManager, socketFilename string) (*Monitor, error) {
m := Monitor{cups, gcp, p, pm, make(chan bool)}
listener, err := net.ListenUnix("unix", &net.UnixAddr{socketFilename, "unix"})
if err != nil {
return nil, err
}
go m.listen(listener)
return &m, nil
}
func (m *Monitor) listen(listener net.Listener) {
ch := make(chan net.Conn)
quitReq := make(chan bool, 1)
quitAck := make(chan bool)
go func() {
for {
conn, err := listener.Accept()
if err != nil {
select {
case <-quitReq:
quitAck <- true
return
}
log.Errorf("Error listening to monitor socket: %s", err)
} else {
ch <- conn
}
}
}()
for {
select {
case conn := <-ch:
log.Info("Received monitor request")
stats, err := m.getStats()
if err != nil {
log.Warningf("Monitor request failed: %s", err)
conn.Write([]byte("error"))
} else {
conn.Write([]byte(stats))
}
conn.Close()
case <-m.listenerQuit:
quitReq <- true
listener.Close()
<-quitAck
m.listenerQuit <- true
return
}
}
}
func (m *Monitor) Quit() {
m.listenerQuit <- true
<-m.listenerQuit
}
func (m *Monitor) getStats() (string, error) {
var cupsPrinterQuantity, rawPrinterQuantity, gcpPrinterQuantity, privetPrinterQuantity int
if cupsPrinters, err := m.cups.GetPrinters(); err != nil {
return "", err
} else {
cupsPrinterQuantity = len(cupsPrinters)
_, rawPrinters := lib.FilterRawPrinters(cupsPrinters)
rawPrinterQuantity = len(rawPrinters)
}
cupsConnOpen := m.cups.ConnQtyOpen()
cupsConnMax := m.cups.ConnQtyMax()
if m.gcp != nil {
if gcpPrinters, err := m.gcp.List(); err != nil {
return "", err
} else {
gcpPrinterQuantity = len(gcpPrinters)
}
}
if m.p != nil {
privetPrinterQuantity = m.p.Size()
}
jobsDone, jobsError, jobsProcessing, err := m.pm.GetJobStats()
if err != nil {
return "", err
}
stats := fmt.Sprintf(
monitorFormat,
cupsPrinterQuantity, rawPrinterQuantity, gcpPrinterQuantity, privetPrinterQuantity,
cupsConnOpen, cupsConnMax,
jobsDone, jobsError, jobsProcessing)
return stats, nil
}
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