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#!/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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|
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puts "Starting Replication Server demo" |
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|
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set RSERV_BIN "/usr/lib/postgresql/bin" |
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|
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# Bring in the interfaces we will be using... |
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|
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#package require Pgtcl |
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load libpgtcl[info sharedlibextension] |
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|
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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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|
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proc {ShowUsage} {} { |
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global argv0 |
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puts "Usage: $argv0 --host name --user name --password string masterdb slavedb" |
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puts "\t--masterhost name --masteruser name --masterpassword string" |
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puts "\t--slavehost name --slaveuser name --slavepassword string" |
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} |
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|
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# Initial values for database access |
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# master, slave variables are tied to text input boxes, |
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# and will be updated on user input |
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proc {SetDbInfo} {db name {host ""} {user ""} {pass ""}} { |
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global dbinfo |
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set dbinfo($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) $pass |
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} |
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|
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# ConnInfo |
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# Connection information for pgtcl library |
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proc {ConnInfo} {{db master}} { |
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global dbinfo |
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set ci "dbname=$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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|
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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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|
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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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|
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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 $ci |
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} |
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|
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|
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SetDbInfo master master localhost |
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SetDbInfo slave slave localhost |
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set dbinfo(snapshot,name) ".__Snapshot" |
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|
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set update "" |
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|
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set show(debug) 1 |
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set show(error) 1 |
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|
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set argi 0 |
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while {$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 '$arg'" |
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ShowUsage |
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exit 1 |
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} |
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default { |
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break |
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} |
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} |
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incr argi |
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} |
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|
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if {$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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|
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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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# |
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# TK layout |
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# |
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|
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wm title . "Async Replication" |
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|
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wm geom . 400x400 |
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|
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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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|
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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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|
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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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|
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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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|
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set r [CreateResultFrame .r Replicate 10] |
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|
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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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|
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set b .button |
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pack [frame $b -borderwidth 10] -fill x |
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|
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pack [button $b.quit -text "Quit" -command Shutdown] |
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|
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# |
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# Functions mapped to buttons |
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# |
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|
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proc {Update} {} { |
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global dbinfo |
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global update |
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|
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elog DEBUG "Opening database [ConnInfo master]..." |
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set res [catch {set db [pg_connect -conninfo "[ConnInfo master]"]} msg] |
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if {$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 $db} |
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} |
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} |
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|
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proc {Replicate} {} { |
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global dbinfo |
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global RSERV_BIN |
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|
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elog DEBUG "Replicating [ConnInfoCmd master]..." |
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exec "$RSERV_BIN/Replicate" --snapshot=$dbinfo(snapshot,name) [ConnInfoParams] [ConnInfoMaster] [ConnInfoSlave] |
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} |
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|
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proc {Show} {} { |
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global dbinfo |
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global update |
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|
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elog DEBUG "Opening database [ConnInfo slave]..." |
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set res [catch {set db [pg_connect -conninfo "[ConnInfo slave]"]} msg] |
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if {$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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|
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proc {Shutdown} {} { |
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global dbinfo |
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exit |
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} |