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595 lines
26 KiB
595 lines
26 KiB
#package require logger |
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package provide shellthread [namespace eval shellthread { |
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variable version |
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set version 1.6 |
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}] |
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package require Thread |
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namespace eval shellthread { |
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proc iso8601 {{tsmicros ""}} { |
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if {$tsmicros eq ""} { |
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set tsmicros [clock micros] |
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} else { |
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set microsnow [clock micros] |
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if {[string length $tsmicros] != [string length $microsnow]} { |
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error "iso8601 requires 'clock micros' or empty string to create timestamp" |
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} |
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} |
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set seconds [expr {$tsmicros / 1000000}] |
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return [clock format $seconds -format "%Y-%m-%d_%H-%M-%S"] |
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} |
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} |
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namespace eval shellthread::worker { |
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variable settings |
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variable sysloghost_port |
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variable sock |
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variable logfile "" |
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variable fd |
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variable client_ids [list] |
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variable ts_start_micros |
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variable errorlist [list] |
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variable inpipe "" |
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proc bgerror {args} { |
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variable errorlist |
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lappend errorlist $args |
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} |
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proc send_errors_now {tidcli} { |
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variable errorlist |
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thread::send -async $tidcli [list shellthread::manager::report_worker_errors [list worker_tid [thread::id] errors $errorlist]] |
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} |
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proc add_client_tid {tidcli} { |
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variable client_ids |
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if {$tidcli ni $client_ids} { |
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lappend client_ids $tidcli |
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} |
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} |
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proc init {tidclient start_m settingsdict} { |
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variable sysloghost_port |
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variable logfile |
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variable settings |
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interp bgerror {} shellthread::worker::bgerror |
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package require overtype |
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variable client_ids |
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variable ts_start_micros |
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lappend client_ids $tidclient |
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set ts_start_micros $start_m |
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set defaults [list -raw 0 -file "" -syslog "" -direction out] |
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set settings [dict merge $defaults $settingsdict] |
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set syslog [dict get $settings -syslog] |
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if {[string length $syslog]} { |
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lassign [split $syslog :] s_host s_port |
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set sysloghost_port [list $s_host $s_port] |
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} else { |
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set sysloghost_port "" |
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} |
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if {[catch {package require udp} errm]} { |
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#disable rather than bomb and interfere with any -file being written |
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set sysloghost_port "" |
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} |
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set logfile [dict get $settings -file] |
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} |
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proc start_pipe_read {source readchan args} { |
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#assume 1 inpipe for now |
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variable inpipe |
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variable sysloghost_port |
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variable logfile |
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set defaults [dict create -buffering \uFFFF ] |
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set opts [dict merge $defaults $args] |
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if {[dict exists $opts -readbuffering]} { |
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set readbuffering [dict get $opts -readbuffering] |
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} else { |
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if {[dict get $opts -buffering] eq "\uFFFF"} { |
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#get buffering setting from the channel as it was set prior to thread::transfer |
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set readbuffering [chan configure $readchan -buffering] |
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} else { |
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set readbuffering [dict get $opts -buffering] |
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chan configure $readchan -buffering $readbuffering |
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} |
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} |
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if {[dict exists $opts -writebuffering]} { |
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set writebuffering [dict get $opts -writebuffering] |
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} else { |
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if {[dict get $opts -buffering] eq "\uFFFF"} { |
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set writebuffering line |
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#set writebuffering [chan configure $writechan -buffering] |
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} else { |
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set writebuffering [dict get $opts -buffering] |
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#can configure $writechan -buffering $writebuffering |
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} |
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} |
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chan configure $readchan -translation lf |
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if {$readchan ni [chan names]} { |
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error "shellthread::worker::start_pipe_read - inpipe not configured. Use shellthread::manager::set_pipe_read_from_client to thread::transfer the pipe end" |
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} |
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set inpipe $readchan |
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#::shellthread::worker::log $inpipe 0 - $source - info "START PIPE READ HELLO\n" line |
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chan configure $readchan -blocking 0 |
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#::shellthread::worker::log $inpipe 0 - $source - info "START PIPE READ HELLO2 readbuffering: $readbuffering syslog $sysloghost_port filename $logfile" line |
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set waitvar ::shellthread::worker::wait($inpipe,[clock micros]) |
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chan event $readchan readable [list apply {{chan source waitfor readbuffering writebuffering} { |
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if {$readbuffering eq "line"} { |
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set chunksize [chan gets $chan chunk] |
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if {$chunksize >= 0} { |
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if {![chan eof $chan]} { |
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::shellthread::worker::log pipe 0 - $source - info $chunk\n $writebuffering |
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} else { |
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::shellthread::worker::log pipe 0 - $source - info $chunk $writebuffering |
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} |
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} |
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} else { |
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set chunk [chan read $chan] |
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::shellthread::worker::log pipe 0 - $source - info $chunk $writebuffering |
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} |
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if {[chan eof $chan]} { |
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chan event $chan readable {} |
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set $waitfor "pipe" |
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chan close $chan |
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} |
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}} $readchan $source $waitvar $readbuffering $writebuffering] |
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#::shellthread::worker::log $inpipe 0 - $source - info "START PIPE READ HELLO3 vwaiting on $waitvar\n" line |
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vwait $waitvar |
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} |
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proc start_pipe_write {source writechan args} { |
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variable outpipe |
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set defaults [dict create -buffering \uFFFF ] |
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set opts [dict merge $defaults $args] |
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#todo! |
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set readchan stdin |
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if {[dict exists $opts -readbuffering]} { |
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set readbuffering [dict get $opts -readbuffering] |
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} else { |
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if {[dict get $opts -buffering] eq "\uFFFF"} { |
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set readbuffering [chan configure $readchan -buffering] |
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} else { |
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set readbuffering [dict get $opts -buffering] |
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chan configure $readchan -buffering $readbuffering |
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} |
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} |
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if {[dict exists $opts -writebuffering]} { |
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set writebuffering [dict get $opts -writebuffering] |
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} else { |
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if {[dict get $opts -buffering] eq "\uFFFF"} { |
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#nothing explicitly set - take from transferred channel |
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set writebuffering [chan configure $writechan -buffering] |
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} else { |
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set writebuffering [dict get $opts -buffering] |
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can configure $writechan -buffering $writebuffering |
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} |
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} |
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if {$writechan ni [chan names]} { |
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error "shellthread::worker::start_pipe_write - outpipe not configured. Use shellthread::manager::set_pipe_write_to_client to thread::transfer the pipe end" |
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} |
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set outpipe $writechan |
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chan configure $readchan -blocking 0 |
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chan configure $writechan -blocking 0 |
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set waitvar ::shellthread::worker::wait($outpipe,[clock micros]) |
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chan event $readchan readable [list apply {{chan writechan source waitfor readbuffering} { |
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if {$readbuffering eq "line"} { |
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set chunksize [chan gets $chan chunk] |
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if {$chunksize >= 0} { |
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if {![chan eof $chan]} { |
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puts $writechan $chunk |
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} else { |
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puts -nonewline $writechan $chunk |
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} |
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} |
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} else { |
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set chunk [chan read $chan] |
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puts -nonewline $writechan $chunk |
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} |
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if {[chan eof $chan]} { |
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chan event $chan readable {} |
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set $waitfor "pipe" |
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chan close $writechan |
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if {$chan ne "stdin"} { |
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chan close $chan |
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} |
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} |
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}} $readchan $writechan $source $waitvar $readbuffering] |
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vwait $waitvar |
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} |
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proc _initsock {} { |
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variable sysloghost_port |
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variable sock |
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if {[string length $sysloghost_port]} { |
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if {[catch {fconfigure $sock} state]} { |
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set sock [udp_open] |
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fconfigure $sock -buffering none -translation binary |
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fconfigure $sock -remote $sysloghost_port |
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} |
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} |
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} |
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proc _reconnect {} { |
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variable sock |
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catch {close $sock} |
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_initsock |
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return [fconfigure $sock] |
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} |
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proc send_info {client_tid ts_sent source msg} { |
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set ts_received [clock micros] |
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set lag_micros [expr {$ts_received - $ts_sent}] |
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set lag [expr {$lag_micros / 1000000.0}] ;#lag as x.xxxxxx seconds |
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log $client_tid $ts_sent $lag $source - info $msg line 1 |
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} |
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proc log {client_tid ts_sent lag source service level msg writebuffering {islog 0}} { |
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variable sock |
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variable fd |
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variable sysloghost_port |
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variable logfile |
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variable settings |
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set logchunk $msg |
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if {![dict get $settings -raw]} { |
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set tail_crlf 0 |
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set tail_lf 0 |
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set tail_cr 0 |
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#for cooked - always remove the trailing newline before splitting.. |
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# |
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#note that if we got our data from reading a non-line-buffered binary channel - then this naive line splitting will not split neatly for mixed line-endings. |
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# |
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#Possibly not critical as cooked is for logging and we are still preserving all \r and \n chars - but review and consider implementing a better split |
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#but add it back exactly as it was afterwards |
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#we can always split on \n - and any adjacent \r will be preserved in the rejoin |
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set lastchar [string range $logchunk end end] |
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if {[string range $logchunk end-1 end] eq "\r\n"} { |
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set tail_crlf 1 |
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set logchunk [string range $logchunk 0 end-2] |
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} else { |
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if {$lastchar eq "\n"} { |
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set tail_lf 1 |
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set logchunk [string range $logchunk 0 end-1] |
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} elseif {$lastchar eq "\r"} { |
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#\r line-endings are obsolete..and unlikely... and ugly as they can hide characters on the console. but we'll pass through anyway. |
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set tail_cr 1 |
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set logchunk [string range $logchunk 0 end-1] |
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} else { |
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#possibly a single line with no linefeed.. or has linefeeds only in the middle |
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} |
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} |
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if {$ts_sent != 0} { |
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set micros [lindex [split [expr {$ts_sent / 1000000.0}] .] end] |
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set time_info [::shellthread::iso8601 $ts_sent].$micros |
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#set time_info "${time_info}+$lag" |
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set lagfp "+[format %f $lag]" |
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} else { |
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#from pipe - no ts_sent/lag info available |
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set time_info "" |
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set lagfp "" |
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} |
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set idtail [string range $client_tid end-8 end] ;#enough for display purposes id - mostly zeros anyway |
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set col0 [string repeat " " 9] |
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set col1 [string repeat " " 27] |
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set col2 [string repeat " " 11] |
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set col3 [string repeat " " 20] |
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#do not columnize the final data column or append to tail - or we could muck up the crlf integrity |
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lassign [list [overtype::left $col0 $idtail] [overtype::left $col1 $time_info] [overtype::left $col2 $lagfp] [overtype::left $col3 $source]] c0 c1 c2 c3 |
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#split on \n no matter the actual line-ending in use |
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#shouldn't matter as long as we don't add anything at the end of the line other than the raw data |
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#ie - don't quote or add spaces |
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set lines [split $logchunk \n] |
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set i 1 |
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set outlines [list] |
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foreach ln $lines { |
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if {$i == 1} { |
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lappend outlines "$c0 $c1 $c2 $c3 $ln" |
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} else { |
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lappend outlines "$c0 $c1 $col2 $c3 $ln" |
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} |
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incr i |
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} |
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if {$tail_lf} { |
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set logchunk "[join $outlines \n]\n" |
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} elseif {$tail_crlf} { |
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set logchunk "[join $outlines \r\n]\r\n" |
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} elseif {$tail_cr} { |
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set logchunk "[join $outlines \r]\r" |
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} else { |
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#no trailing linefeed |
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set logchunk [join $outlines \n] |
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} |
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#set logchunk "[overtype::left $col0 $idtail] [overtype::left $col1 $time_info] [overtype::left $col2 "+$lagfp"] [overtype::left $col3 $source] $msg" |
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} |
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if {[string length $sysloghost_port]} { |
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_initsock |
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catch {puts -nonewline $sock $logchunk} |
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} |
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#todo - sockets etc? |
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if {[string length $logfile]} { |
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#todo - setting to maintain open filehandle and reduce io. |
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# possible settings for buffersize - and maybe logrotation, although this could be left to client |
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#for now - default to safe option of open/close each write despite the overhead. |
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set fd [open $logfile a] |
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chan configure $fd -translation auto -buffering $writebuffering |
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#whether line buffered or not - by now our logchunk includes newlines |
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puts -nonewline $fd $logchunk |
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close $fd |
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} |
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} |
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# - withdraw just this client |
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proc finish {tidclient} { |
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variable client_ids |
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if {($tidclient in $clientids) && ([llength $clientids] == 1)} { |
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terminate $tidclient |
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} else { |
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set posn [lsearch $client_ids $tidclient] |
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set client_ids [lreplace $clientids $posn $posn] |
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} |
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} |
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#allow any client to terminate |
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proc terminate {tidclient} { |
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variable sock |
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variable client_ids |
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if {$tidclient in $client_ids} { |
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catch {close $sock} |
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set client_ids [list] |
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return 1 |
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} else { |
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return 0 |
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} |
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} |
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} |
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namespace eval shellthread::manager { |
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variable workers [dict create] |
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variable worker_errors [list] |
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variable log_threads |
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#new datastructure regarding workers and sourcetags required. |
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#one worker can service multiple sourcetags - but each sourcetag may be used by multiple threads too. |
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#generally each thread will use a specific sourcetag - but we may have pools doing similar things which log to same destination. |
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# |
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#As a convention we may use a sourcetag for the thread which started the worker that isn't actually used for logging - but as a common target for joins |
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#If the thread which started the thread calls leave_worker with that 'primary' sourcetag it means others won't be able to use that target - which seems reasonable. |
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#If another thread want's to maintain joinability beyond the span provided by the starting client, |
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#it can join with both the primary tag and a tag it will actually use for logging. |
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#A thread can join the logger with any existingtag - not just the 'primary' |
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#(which is arbitrary anyway. It will usually be the first in the list - but may be unsubscribed by clients and disappear) |
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proc join_worker {client_tid existingtag sourcetaglist} { |
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#todo - allow a source to piggyback on existing worker by referencing one of the sourcetags already using the worker |
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} |
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proc leave_worker {client_tid sourcetaglist} { |
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#todo |
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#unsub this client_tid from the sourcetags in the sourcetaglist. if no more client_tids exist for sourcetag, remove sourcetag, |
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#if no more sourcetags - close worker |
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} |
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#it is up to caller to use a unique sourcetag (e.g by prefixing with own thread::id etc) |
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# This allows multiple threads to more easily write to the same named sourcetag if necessary |
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# todo - change sourcetag for a list of tags which will be handled by the same thread. e.g for multiple threads logging to same file |
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# |
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# todo - some protection mechanism for case where target is a file to stop creation of multiple worker threads writing to same file. |
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# Even if we use open fd,close fd wrapped around writes.. it is probably undesirable to have multiple threads with same target |
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# On the other hand socket targets such as UDP can happily be written to by multiple threads. |
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# For now the mechanism is that a call to new_worker (rename to open_worker?) will join the same thread if a sourcetag matches.. |
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# but, as sourcetags can get removed(unsubbed via leave_worker) this doesn't guarantee two threads with same -file settings won't fight. |
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# Also.. the settingsdict is ignored when joining with a tag that exists.. this is problematic.. e.g logrotation where previous file still being written by existing worker |
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# todo - rename 'sourcetag' concept to 'targettag' ?? the concept is a mixture of both.. it is somewhat analagous to a syslog 'facility' |
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# probably new_worker should disallow auto-joining and we allow different workers to handle same tags simultaneously to support overlap during logrotation etc. |
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proc new_worker {sourcetaglist {settingsdict {}}} { |
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variable workers |
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set ts_start [clock micros] |
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set tidclient [thread::id] |
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set sourcetag [lindex $sourcetaglist 0] ;#todo - use all |
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if {[dict exists $workers $sourcetag]} { |
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set winfo [dict get $workers $sourcetag] |
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if {[thread::exists [dict get $winfo tid]]} { |
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#add our client-info to existing worker thread |
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dict lappend winfo list_client_tids $tidclient |
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dict set workers $sourcetag $winfo ;#writeback |
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return [dict get $winfo tid] |
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} |
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} |
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#set ts_start [::shellthread::iso8601] |
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set tidworker [thread::create -preserved] |
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set init_script [string map [list %ts_start% $ts_start %mp% [tcl::tm::list] %ap% $::auto_path %tidcli% $tidclient %sd% $settingsdict] { |
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#set tclbase [file dirname [file dirname [info nameofexecutable]]] |
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#set tcllib $tclbase/lib |
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#if {$tcllib ni $::auto_path} { |
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# lappend ::auto_path $tcllib |
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#} |
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set ::settingsinfo [dict create %sd%] |
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#if the executable running things is something like a tclkit, |
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# then it's likely we will need to use the caller's auto_path and tcl::tm::list to find things |
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#The caller can tune the thread's package search by providing a settingsdict |
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if {![dict exists $::settingsinfo tcl_tm_list]} { |
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tcl::tm::add %mp% |
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} else { |
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tcl::tm::remove {*}[tcl::tm::list] |
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tcl::tm::add {*}[dict get $::settingsinfo tcl_tm_list] |
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} |
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if {![dict exists $::settingsinfo auto_path]} { |
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set ::auto_path [list %ap%] |
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} else { |
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set ::auto_path [dict get $::settingsinfo auto_path] |
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} |
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package require Thread |
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package require shellthread |
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if {![catch {::shellthread::worker::init %tidcli% %ts_start% $::settingsinfo} errmsg]} { |
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unset ::settingsinfo |
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set ::shellthread_init "ok" |
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} else { |
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unset ::settingsinfo |
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set ::shellthread_init "err $errmsg" |
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} |
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}] |
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thread::send -async $tidworker $init_script |
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#thread::send $tidworker $init_script |
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set winfo [dict create tid $tidworker list_client_tids [list $tidclient] ts_start $ts_start ts_end_list [list]] |
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dict set workers $sourcetag $winfo |
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return $tidworker |
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} |
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proc set_pipe_read_from_client {tag_pipename worker_tid rchan args} { |
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variable workers |
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if {![dict exists $workers $tag_pipename]} { |
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error "workerthread::manager::set_pipe_read_from_client source/pipename $tag_pipename not found" |
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} |
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set match_worker_tid [dict get $workers $tag_pipename tid] |
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if {$worker_tid ne $match_worker_tid} { |
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error "workerthread::manager::set_pipe_read_from_client source/pipename $tag_pipename workert_tid mismatch '$worker_tid' vs existing:'$match_worker_tid'" |
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} |
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#buffering set during channel creation will be preserved on thread::transfer |
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thread::transfer $worker_tid $rchan |
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#start_pipe_read will vwait - so we have to send async |
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thread::send -async $worker_tid [list ::shellthread::worker::start_pipe_read $tag_pipename $rchan] |
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#client may start writing immediately - but presumably it will buffer in fifo2 |
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} |
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proc set_pipe_write_to_client {tag_pipename worker_tid wchan args} { |
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variable workers |
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if {![dict exists $workers $tag_pipename]} { |
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error "workerthread::manager::set_pipe_write_to_client pipename $tag_pipename not found" |
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} |
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set match_worker_tid [dict get $workers $tag_pipename tid] |
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if {$worker_tid ne $match_worker_tid} { |
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error "workerthread::manager::set_pipe_write_to_client pipename $tag_pipename workert_tid mismatch '$worker_tid' vs existing:'$match_worker_tid'" |
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} |
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#buffering set during channel creation will be preserved on thread::transfer |
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thread::transfer $worker_tid $wchan |
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thread::send -async $worker_tid [list ::shellthread::worker::start_pipe_write $tag_pipename $wchan] |
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} |
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proc write_log {source msg args} { |
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variable workers |
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set ts_micros_sent [clock micros] |
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set defaults [list -async 1 -level info] |
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set opts [dict merge $defaults $args] |
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if {[dict exists $workers $source]} { |
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set tidworker [dict get $workers $source tid] |
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if {![thread::exists $tidworker]} { |
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set tidworker [new_worker $source] |
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} |
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} else { |
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#auto create with no requirement to call new_worker.. warn? |
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set tidworker [new_worker $source] |
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} |
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set client_tid [thread::id] |
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if {[dict get $opts -async]} { |
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thread::send -async $tidworker [list ::shellthread::worker::send_info $client_tid $ts_micros_sent $source $msg] |
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} else { |
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thread::send $tidworker [list ::shellthread::worker::send_info $client_tid $ts_micros_sent $source $msg] |
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} |
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} |
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proc report_worker_errors {errdict} { |
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variable workers |
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set reporting_tid [dict get $errdict worker_tid] |
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dict for {src srcinfo} $workers { |
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if {[dict get $srcinfo tid] eq $reporting_tid} { |
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dict set srcinfo errors [dict get $errdict errors] |
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dict set workers $src $srcinfo ;#writeback updated |
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break |
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} |
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} |
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} |
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proc close_worker {source {timeout 2500}} { |
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variable workers |
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variable worker_errors |
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set ts_now [clock micros] |
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#puts stderr "close_worker $source" |
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if {[dict exists $workers $source]} { |
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set tidworker [dict get $workers $source tid] |
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set ts_end_list [dict get $workers $source ts_end_list] |
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if {[llength $ts_end_list]} { |
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set last_end_ts [lindex $ts_end_list end] |
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if {[expr {(($tsnow - $last_end_ts) / 1000) >= $timeout}]} { |
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lappend ts_end_list $ts_now |
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dict set workers $source ts_end_list $ts_end_list |
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} else { |
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#existing close in progress.. assume it will work |
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return |
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} |
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} |
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|
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if {[thread::exists $tidworker]} { |
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#puts stderr "shellthread::manager::close_worker: thread $tidworker for source $source still running.. terminating" |
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set timeoutarr($source) 0 |
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after $timeout [list set timeoutarr($source) 2] |
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|
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thread::send -async $tidworker [list shellthread::worker::send_errors_now [thread::id]] |
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thread::send -async $tidworker [list shellthread::worker::terminate [thread::id]] timeoutarr($source) |
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|
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#thread::send -async $tidworker [string map [list %tidclient% [thread::id]] { |
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# shellthread::worker::terminate %tidclient% |
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#}] timeoutarr($source) |
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|
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vwait timeoutarr($source) |
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#puts stderr "shellthread::manager::close_worker: thread $tidworker for source $source DONE1" |
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|
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thread::release $tidworker |
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#puts stderr "shellthread::manager::close_worker: thread $tidworker for source $source DONE2" |
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if {[dict exists $workers $source errors]} { |
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set errlist [dict get $workers $source errors] |
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if {[llength $errlist]} { |
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lappend worker_errors [list $source [dict get $workers $source]] |
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} |
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} |
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dict unset workers $source |
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} |
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} |
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#puts stdout "close_worker $source - end" |
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} |
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|
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#worker errors only available for a source after close_worker called on that source |
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#It is possible for there to be multiple entries for a source because new_worker can be called multiple times with same sourcetag, |
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# e.g if a thread |
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proc get_and_clear_errors {source} { |
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variable worker_errors |
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set source_errors [lsearch -all -inline -index 0 $worker_errors $source] |
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set worker_errors [lsearch -all -inline -index 0 -not $worker_errors $source] |
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return $source_errors |
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} |
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} |
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