Class ::nsmcp::QuestionJobPoller (public)
::nx::Class ::nsmcp::QuestionJobPoller
Defined in /usr/local/ns/tcl/nsmcp/question-backend.tcl
- Testcases:
- No testcase defined.
Source code: :public object method wait {name json deadline emit poll {check {}}} { # # Wait for a background tool job while reporting its progress. # # Poll retained handles within the question deadline, emit status events and # honor cancellation; do not restart the original job. # # @param name Name of the configured or registered item to resolve. # @param json Serialized JSON supplied by the backend transport. # @param deadline Absolute deadline in clock milliseconds. # @param emit Event callback prefix; returning false requests cancellation. # @param poll Callback prefix invoked with a retained background-job handle. # @param check Optional callback used to check cancellation or other turn # constraints. # # @return The final tool-result JSON, or the current JSON when it is not a # pollable job. # set delay 0.1 while {1} { set value [ns_json parse $json] if {[dict exists $value isError] && [dict get $value isError]} { return $json } if {![dict exists $value structuredContent jobHandle]} { return $json } set job [dict get $value structuredContent] set handle [dict get $job jobHandle] if {![regexp {^[0-9a-f]{64}$} $handle] || ![dict exists $job status]} { return $json } set status [dict get $job status] set event [dict create type job name $name jobHandle $handle status $status] if {[dict exists $job progress]} { dict set event progress [dict get $job progress] } if {![uplevel #0 [list {*}$emit $event]]} { return -code error -errorcode {NSMCP QUESTION CANCELLED} "Question cancelled; background jobHandle: $handle" } if {$status ni {queued running}} { return $json } if {[clock milliseconds] >= $deadline} { error "Question timed out waiting for background jobHandle $handle; use log_results with this handle to continue" } if {$check ne ""} { uplevel #0 $check } ns_sleep [expr {min($delay,max(0.001,($deadline-[clock milliseconds])/1000.0))}] set json [uplevel #0 [list {*}$poll $handle]] set delay [expr {min(1.0,$delay*1.5)}] } }XQL Not present: Generic, PostgreSQL, Oracle
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