314 lines
8.2 KiB
Tcl
314 lines
8.2 KiB
Tcl
#!/bin/sh
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## pgserv.tcl
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# (c) 2000 Thomas Lockhart, PostgreSQL Inc.
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# The next line will reinvoke as wish *DO NOT REMOVE OR ALTER* \
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exec wish "$0" "$@"
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puts "Starting Replication Server demo"
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set RSERV_BIN "@BINDIR@"
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# Bring in the interfaces we will be using...
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#package require Pgtcl
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load libpgtcl[info sharedlibextension]
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# elog
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# Information or error log and exit handler
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proc {elog} {level message} {
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global show
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switch -exact -- $level {
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DEBUG {
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if {$show(debug)} {
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puts "DEBUG $message"
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}
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}
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ERROR {
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if {$show(error)} {
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puts "ERROR $message"
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}
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FATAL {
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if ($show(error)} {
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puts "FATAL $message"
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}
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exit 1
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}
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default {
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puts "INFO $message"
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}
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}
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}
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proc {ShowUsage} {} {
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global argv0
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puts "Usage: $argv0 --host name --user name --password string masterdb slavedb"
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puts "\t--masterhost name --masteruser name --masterpassword string"
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puts "\t--slavehost name --slaveuser name --slavepassword string"
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}
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# Initial values for database access
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# master, slave variables are tied to text input boxes,
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# and will be updated on user input
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proc {SetDbInfo} {db name {host ""} {user ""} {pass ""}} {
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global dbinfo
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set dbinfo($db,name) $name
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set dbinfo($db,host) $host
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set dbinfo($db,user) $user
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set dbinfo($db,pass) $pass
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}
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# ConnInfo
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# Connection information for pgtcl library
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proc {ConnInfo} {{db master}} {
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global dbinfo
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set ci "dbname=$dbinfo($db,name)"
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if {[string length $dbinfo($db,host)] > 0} {
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set ci "$ci host=$dbinfo($db,host)"
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}
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if {[string length $dbinfo($db,user)] > 0} {
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set ci "$ci user=$dbinfo($db,user)"
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}
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if {[string length $dbinfo($db,pass)] > 0} {
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set ci "$ci password=$dbinfo($db,pass)"
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}
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# puts "Construct conninfo $ci"
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return $ci
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}
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# ConnInfoParams
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# Connection information for (perl) callable programs
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proc {ConnInfoParams} {{db master}} {
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global dbinfo
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set ci ""
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if {[string length $dbinfo($db,host)] > 0} {
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set ci "$ci --host=$dbinfo($db,host)"
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}
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if {[string length $dbinfo($db,user)] > 0} {
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set ci "$ci --user=$dbinfo($db,user)"
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}
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if {[string length $dbinfo($db,pass)] > 0} {
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set ci "$ci --password=$dbinfo($db,pass)"
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}
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# puts "Construct conninfo $ci"
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return $ci
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}
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# ConnInfoMaster
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# Connection information for (perl) callable programs
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proc {ConnInfoMaster} {{db master}} {
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global dbinfo
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set ci $dbinfo($db,name)
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if {[string length $dbinfo($db,host)] > 0} {
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set ci "$ci --masterhost=$dbinfo($db,host)"
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}
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if {[string length $dbinfo($db,user)] > 0} {
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set ci "$ci --masteruser=$dbinfo($db,user)"
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}
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if {[string length $dbinfo($db,pass)] > 0} {
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set ci "$ci --masterpassword=$dbinfo($db,pass)"
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}
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# puts "Construct conninfo $ci"
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return $ci
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}
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# ConnInfoSlave
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# Connection information for (perl) callable programs
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proc {ConnInfoSlave} {{db slave}} {
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global dbinfo
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set ci $dbinfo($db,name)
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if {[string length $dbinfo($db,host)] > 0} {
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set ci "$ci --slavehost=$dbinfo($db,host)"
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}
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if {[string length $dbinfo($db,user)] > 0} {
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set ci "$ci --slaveuser=$dbinfo($db,user)"
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}
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if {[string length $dbinfo($db,pass)] > 0} {
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set ci "$ci --slavepassword=$dbinfo($db,pass)"
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}
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# puts "Construct conninfo $ci"
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return $ci
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}
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SetDbInfo master master localhost
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SetDbInfo slave slave localhost
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set dbinfo(snapshot,name) "__Snapshot"
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set update ""
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set show(debug) 1
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set show(error) 1
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set argi 0
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while {$argi < $argc} {
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# puts "argi is $argi; argc is $argc"
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set arg [lindex $argv $argi]
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switch -glob -- $arg {
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-h -
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--host {
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incr argi
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set dbinfo(master,host) [lindex $argv $argi]
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set dbinfo(slave,host) [lindex $argv $argi]
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}
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--masterhost {
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incr argi
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set dbinfo(master,host) [lindex $argv $argi]
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}
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--slavehost {
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incr argi
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set dbinfo(slave,host) [lindex $argv $argi]
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}
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-u -
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--user {
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incr argi
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set dbinfo(master,user) [lindex $argv $argi]
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set dbinfo(slave,user) [lindex $argv $argi]
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}
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--masteruser {
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incr argi
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set dbinfo(master,user) [lindex $argv $argi]
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}
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--slaveuser {
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incr argi
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set dbinfo(slave,user) [lindex $argv $argi]
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}
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-s -
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--snapshot {
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incr argi
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set dbinfo(snapshot,name) [lindex $argv $argi]
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}
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-* {
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elog ERROR "$argv0: invalid parameter '$arg'"
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ShowUsage
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exit 1
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}
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default {
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break
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}
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}
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incr argi
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}
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if {$argi < $argc} {
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set dbinfo(master,name) [lindex $argv $argi]
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incr argi
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}
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if {$argi < $argc} {
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set dbinfo(slave,name) [lindex $argv $argi]
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incr argi
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}
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if {$argi < $argc} {
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elog "$argv0: too many parameters"
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ShowUsage
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exit 1
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}
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elog DEBUG "User is $dbinfo(master,user) $dbinfo(slave,user)"
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elog DEBUG "Host is $dbinfo(master,host) $dbinfo(slave,host)"
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#
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# TK layout
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#
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wm title . "Async Replication"
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wm geom . 400x400
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proc {CreateResultFrame} {b l w} {
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pack [frame $b -borderwidth 10] -fill x
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pack [button $b.run -text $l -command $l -width $w] -side left
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# pack [entry $b.e -textvariable NewRow] -side left
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}
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set t .top
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pack [frame $t -borderwidth 10] -fill x
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pack [frame $t.h -borderwidth 10] -fill x
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pack [label $t.h.h -text "PostgreSQL Async Replication Server"]
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set b .b
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pack [frame $b -borderwidth 10] -fill x
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pack [frame $b.l -borderwidth 10] -fill x
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pack [label $b.l.ml -text "Master"] -side left
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pack [label $b.l.sl -text "Slave"] -side right
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pack [entry $b.m -textvariable dbinfo(master,name) -width 25] -side left
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pack [entry $b.s -textvariable dbinfo(slave,name) -width 25] -side right
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set b .u
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pack [frame $b -borderwidth 10] -fill x
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pack [button $b.run -text update -command Update -width 10] -side left
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pack [entry $b.e -textvariable update -width 50] -side left
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set r [CreateResultFrame .r Replicate 10]
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set b .s
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pack [frame $b -borderwidth 10] -fill x
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pack [button $b.b -text Show -command Show -width 10] -side left
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pack [label $b.e -text ""] -side left
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set b .button
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pack [frame $b -borderwidth 10] -fill x
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pack [button $b.quit -text "Quit" -command Shutdown]
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#
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# Functions mapped to buttons
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#
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proc {Update} {} {
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global dbinfo
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global update
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elog DEBUG "Opening database [ConnInfo master]..."
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set res [catch {set db [pg_connect -conninfo "[ConnInfo master]"]} msg]
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if {$res} {
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elog ERROR "Database '$dbinfo(master,name)' is not available: $res ($msg)"
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} else {
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elog DEBUG "Insert $update into database $dbinfo(master,name)..."
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set res [pg_exec $db "insert into test select '$update', max(k)+1, max(l)+1 from test"]
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elog DEBUG [pg_result $res -status]
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catch {pg_disconnect $db}
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}
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}
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proc {Replicate} {} {
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global dbinfo
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global RSERV_BIN
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elog DEBUG "Replicating [ConnInfoCmd master]..."
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exec "$RSERV_BIN/Replicate" --snapshot=$dbinfo(snapshot,name) [ConnInfoParams] [ConnInfoMaster] [ConnInfoSlave]
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}
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proc {Show} {} {
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global dbinfo
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global update
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elog DEBUG "Opening database [ConnInfo slave]..."
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set res [catch {set db [pg_connect -conninfo "[ConnInfo slave]"]} msg]
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if {$res} {
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elog ERROR "DB $dbinfo(slave,name) not available: $res ($msg)"
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} else {
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elog DEBUG "Select $update from database $dbinfo(slave,name)..."
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set res [pg_exec $db "select i from test where i='$update'"]
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if {[pg_result $res -status] != "PGRES_TUPLES_OK"} {
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.s.e config -text "n/a"
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} else {
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set ntups [pg_result $res -numTuples]
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if {$ntups <= 0} {
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.s.e config -text "n/a"
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} else {
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for {set i 0} {$i < $ntups} {incr i} {
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set val [pg_result $res -getTuple $i]
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.s.e config -text $val
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}
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}
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pg_result $res -clear
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}
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catch {pg_disconnect $db}
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}
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}
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proc {Shutdown} {} {
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global dbinfo
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exit
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}
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