| 1 | # ---------------------------------------------------------------------- |
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| 2 | # COMPONENT: service - represents a tool embedded within another tool |
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| 3 | # |
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| 4 | # The tool.xml description for a Rappture tool can contain one or |
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| 5 | # more embedded <tool> references. Each Rappture::Service object |
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| 6 | # represents an embedded <tool> and manages its operation, |
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| 7 | # contributing some service to the overall tool. |
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| 8 | # ====================================================================== |
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| 9 | # AUTHOR: Michael McLennan, Purdue University |
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| 10 | # Copyright (c) 2004-2012 HUBzero Foundation, LLC |
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| 11 | # |
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| 12 | # See the file "license.terms" for information on usage and |
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| 13 | # redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 14 | # ====================================================================== |
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| 15 | package require BLT |
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| 16 | |
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| 17 | itcl::class Rappture::Service { |
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| 18 | constructor {owner path args} { # defined below } |
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| 19 | destructor { # defined below } |
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| 20 | |
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| 21 | public method control {} |
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| 22 | public method input {} |
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| 23 | public method output {args} |
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| 24 | |
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| 25 | public method run {} |
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| 26 | public method abort {} |
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| 27 | public method clear {} |
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| 28 | |
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| 29 | protected method _link {from to} |
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| 30 | |
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| 31 | private variable _owner "" ;# thing managing this service |
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| 32 | private variable _path "" ;# path to the <tool> description in _owner |
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| 33 | private variable _tool "" ;# underlying tool for this service |
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| 34 | private variable _control "" ;# control: auto/manual |
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| 35 | private variable _show ;# <show> info for input/output methods |
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| 36 | private variable _obj2path ;# maps object in _show => service path |
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| 37 | private variable _path2widget ;# maps path for object in _show => widget |
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| 38 | private variable _path2path ;# maps path for object in _show => link path |
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| 39 | private variable _result "" ;# result from last run |
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| 40 | } |
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| 41 | |
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| 42 | # ---------------------------------------------------------------------- |
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| 43 | # CONSTRUCTOR |
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| 44 | # ---------------------------------------------------------------------- |
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| 45 | itcl::body Rappture::Service::constructor {owner path args} { |
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| 46 | if {[catch {$owner isa Rappture::ControlOwner} valid] != 0 || !$valid} { |
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| 47 | error "bad object \"$owner\": should be Rappture::ControlOwner" |
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| 48 | } |
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| 49 | set _owner $owner |
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| 50 | set _path $path |
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| 51 | |
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| 52 | # |
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| 53 | # Load up the tool description from the <interface> file. |
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| 54 | # |
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| 55 | set intf [$_owner xml get $path.interface] |
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| 56 | if {"" == $intf} { |
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| 57 | puts "can't find <interface> description for tool at $path" |
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| 58 | } else { |
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| 59 | set installdir [[$_owner tool] installdir] |
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| 60 | regsub -all @tool $intf $installdir intf |
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| 61 | |
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| 62 | set xmlobj [Rappture::library $intf] |
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| 63 | set installdir [file dirname $intf] |
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| 64 | set _tool [Rappture::Tool ::#auto $xmlobj $installdir] |
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| 65 | set _control [$_tool xml get tool.control] |
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| 66 | |
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| 67 | # |
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| 68 | # Scan through the <tool> and establish all of the |
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| 69 | # relationships: |
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| 70 | # |
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| 71 | # <show> ... Add to list of "input" for this service. |
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| 72 | # Caller will add controls to the interface. |
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| 73 | # |
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| 74 | # <link> ... Link this value to another input/output |
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| 75 | # that exists in the containing tool. |
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| 76 | # |
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| 77 | # <set> .... Hard-code the value for this input/output. |
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| 78 | # |
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| 79 | foreach dir {input output} { |
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| 80 | set _show($dir) "" |
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| 81 | foreach cname [$_owner xml children $path.$dir] { |
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| 82 | set ppath $path.$dir.$cname |
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| 83 | |
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| 84 | set spath [$_owner xml get $ppath.path] |
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| 85 | if {"" == $spath} { |
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| 86 | error "missing <path> at $ppath" |
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| 87 | } |
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| 88 | |
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| 89 | set type [$_owner xml element -as type $ppath] |
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| 90 | switch -- $type { |
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| 91 | show { |
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| 92 | puts "show: $spath" |
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| 93 | set tpath [$_owner xml get $ppath.to] |
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| 94 | if {"" == $tpath && $dir == "input"} { |
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| 95 | error "missing <to> at $ppath" |
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| 96 | } |
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| 97 | set obj [$_tool xml element -as object $spath] |
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| 98 | puts " => $obj" |
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| 99 | lappend _show($dir) $obj |
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| 100 | set _obj2path($obj) $spath |
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| 101 | |
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| 102 | if {$dir == "input"} { |
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| 103 | puts "link: $tpath => $spath" |
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| 104 | $_owner notify add $this $tpath \ |
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| 105 | [itcl::code $this _link $tpath $spath] |
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| 106 | } |
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| 107 | } |
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| 108 | link { |
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| 109 | set tpath [$_owner xml get $ppath.to] |
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| 110 | if {"" == $tpath} { |
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| 111 | error "missing <to> at $ppath" |
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| 112 | } |
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| 113 | if {"" == [$_owner xml element $tpath]} { |
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| 114 | error "bad <to> path \"$tpath\" at $ppath" |
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| 115 | } |
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| 116 | if {$dir == "input"} { |
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| 117 | puts "link: $tpath => $spath" |
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| 118 | $_owner notify add $this $tpath \ |
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| 119 | [itcl::code $this _link $tpath $spath] |
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| 120 | } else { |
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| 121 | puts "path2path: $spath => $tpath" |
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| 122 | set _path2path($spath) $tpath |
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| 123 | } |
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| 124 | } |
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| 125 | set { |
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| 126 | if {"" == [$_owner xml element $ppath.value]} { |
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| 127 | error "missing <value> at $ppath" |
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| 128 | } |
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| 129 | puts "set: $spath from $ppath.value" |
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| 130 | $_tool xml copy $spath from \ |
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| 131 | [$_owner xml object] $ppath.value |
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| 132 | } |
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| 133 | } |
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| 134 | } |
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| 135 | } |
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| 136 | |
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| 137 | if {$_control != "auto"} { |
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| 138 | set _show(control) [$_tool xml element -as object tool.control] |
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| 139 | } else { |
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| 140 | set _show(control) "" |
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| 141 | } |
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| 142 | } |
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| 143 | |
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| 144 | eval configure $args |
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| 145 | } |
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| 146 | |
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| 147 | # ---------------------------------------------------------------------- |
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| 148 | # DESTRUCTOR |
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| 149 | # ---------------------------------------------------------------------- |
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| 150 | itcl::body Rappture::Service::destructor {} { |
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| 151 | foreach dir [array names _show] { |
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| 152 | foreach obj $_show($dir) { |
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| 153 | itcl::delete object $obj |
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| 154 | } |
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| 155 | } |
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| 156 | } |
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| 157 | |
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| 158 | # ---------------------------------------------------------------------- |
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| 159 | # USAGE: control |
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| 160 | # |
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| 161 | # Used by the container that displays this service to determine what |
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| 162 | # the control for this service should look like. Returns "" if |
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| 163 | # there is no control--the service is invoked automatically whenever |
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| 164 | # the inputs change. Otherwise, it returns a list of the form |
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| 165 | # {key value key value ...} with attributes that configure the button |
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| 166 | # controlling this service. |
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| 167 | # ---------------------------------------------------------------------- |
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| 168 | itcl::body Rappture::Service::control {} { |
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| 169 | return $_show(control) |
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| 170 | } |
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| 171 | |
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| 172 | # ---------------------------------------------------------------------- |
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| 173 | # USAGE: input |
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| 174 | # |
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| 175 | # Used by the container that displays this service to describe any |
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| 176 | # inputs for this service that should be added to the main service. |
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| 177 | # Returns a list of XML objects representing various input controls. |
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| 178 | # ---------------------------------------------------------------------- |
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| 179 | itcl::body Rappture::Service::input {} { |
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| 180 | return $_show(input) |
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| 181 | } |
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| 182 | |
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| 183 | # ---------------------------------------------------------------------- |
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| 184 | # USAGE: output |
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| 185 | # USAGE: output for <object> <widget> |
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| 186 | # |
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| 187 | # Used by the container that displays this service to describe any |
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| 188 | # outputs for this service that should be added to the main service. |
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| 189 | # |
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| 190 | # With no args, it returns a list of XML objects representing various |
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| 191 | # outputs. The caller uses this information to create various output |
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| 192 | # widgets. |
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| 193 | # ---------------------------------------------------------------------- |
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| 194 | itcl::body Rappture::Service::output {args} { |
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| 195 | if {[llength $args] == 0} { |
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| 196 | return $_show(output) |
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| 197 | } |
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| 198 | set option [lindex $args 0] |
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| 199 | switch -- $option { |
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| 200 | for { |
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| 201 | if {[llength $args] != 3} { |
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| 202 | error "wrong # args: should be \"output for object widget\"" |
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| 203 | } |
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| 204 | set obj [lindex $args 1] |
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| 205 | set win [lindex $args 2] |
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| 206 | if {[info exists _obj2path($obj)]} { |
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| 207 | set path $_obj2path($obj) |
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| 208 | puts "OUTPUT $path => $win" |
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| 209 | set _path2widget($path) $win |
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| 210 | } else { |
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| 211 | puts "error: don't recognize output object $obj" |
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| 212 | } |
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| 213 | } |
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| 214 | default { |
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| 215 | error "bad option \"$option\": should be for" |
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| 216 | } |
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| 217 | } |
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| 218 | } |
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| 219 | |
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| 220 | # ---------------------------------------------------------------------- |
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| 221 | # USAGE: run |
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| 222 | # |
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| 223 | # This method causes the service to run. All widgets are synchronized |
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| 224 | # to the current XML representation, and a "driver.xml" file is |
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| 225 | # created as the input for the run. That file is fed to the tool |
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| 226 | # according to the <tool><command> string, and the job is executed. |
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| 227 | # |
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| 228 | # All outputs are pushed out to the tool containing this service |
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| 229 | # according to the <outputs> directive for the service. |
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| 230 | # ---------------------------------------------------------------------- |
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| 231 | itcl::body Rappture::Service::run {} { |
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| 232 | puts "running..." |
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| 233 | clear |
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| 234 | foreach {status result} [$_tool run] break |
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| 235 | |
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| 236 | if {$status == 0 && $result != "ABORT"} { |
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| 237 | if {[regexp {=RAPPTURE-RUN=>([^\n]+)} $result match file]} { |
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| 238 | set xmlobj [Rappture::library $file] |
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| 239 | # |
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| 240 | # Scan through all outputs and copy them to the final output |
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| 241 | # for the tool. If they have widgets associated with them, |
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| 242 | # set the value for the widget. |
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| 243 | # |
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| 244 | puts "showing output..." |
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| 245 | foreach cname [$xmlobj children output] { |
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| 246 | set path output.$cname |
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| 247 | puts " for $path" |
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| 248 | $_owner xml copy $path from $xmlobj $path |
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| 249 | |
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| 250 | if {[info exists _path2widget($path)]} { |
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| 251 | set obj [$xmlobj element -as object $path] |
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| 252 | puts " sending $obj to $_path2widget($path)" |
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| 253 | $_path2widget($path) value $obj |
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| 254 | } |
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| 255 | if {[info exists _path2path($path)]} { |
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| 256 | puts " sending $path to $_path2path($path)" |
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| 257 | $_owner xml copy $_path2path($path) from $xmlobj $path |
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| 258 | set w [$_owner widgetfor $_path2path($path)] |
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| 259 | if {$w != ""} { |
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| 260 | set obj [$_owner xml element -as object $_path2path($path)] |
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| 261 | $w value $obj |
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| 262 | } |
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| 263 | } |
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| 264 | } |
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| 265 | set _result $xmlobj |
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| 266 | } else { |
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| 267 | set status 1 |
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| 268 | set result "Can't find result file in output:\n\n$result" |
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| 269 | } |
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| 270 | } |
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| 271 | } |
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| 272 | |
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| 273 | # ---------------------------------------------------------------------- |
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| 274 | # USAGE: abort |
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| 275 | # |
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| 276 | # Clients use this during a "run" to abort the current job. |
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| 277 | # Kills the job and forces the "run" method to return. |
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| 278 | # ---------------------------------------------------------------------- |
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| 279 | itcl::body Rappture::Service::abort {} { |
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| 280 | $_tool abort |
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| 281 | } |
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| 282 | |
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| 283 | # ---------------------------------------------------------------------- |
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| 284 | # USAGE: clear |
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| 285 | # |
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| 286 | # Clears any result hanging around from the last run. |
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| 287 | # ---------------------------------------------------------------------- |
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| 288 | itcl::body Rappture::Service::clear {} { |
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| 289 | if {"" != $_result} { |
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| 290 | foreach cname [$_result children output] { |
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| 291 | set path output.$cname |
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| 292 | |
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| 293 | if {[info exists _path2widget($path)]} { |
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| 294 | $_path2widget($path) value "" |
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| 295 | } |
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| 296 | } |
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| 297 | itcl::delete object $_result |
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| 298 | set _result "" |
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| 299 | } |
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| 300 | } |
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| 301 | |
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| 302 | # ---------------------------------------------------------------------- |
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| 303 | # USAGE: _link <fromPath> <toPath> |
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| 304 | # |
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| 305 | # Used internally to link the value at <fromPath> in the outer tool |
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| 306 | # to the value at <toPath> for this service. If this service is |
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| 307 | # automatic and <toPath> is an input, this also invokes the service. |
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| 308 | # ---------------------------------------------------------------------- |
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| 309 | itcl::body Rappture::Service::_link {from to} { |
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| 310 | $_tool xml copy $to from [$_owner xml object] $from |
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| 311 | if {$_control == "auto" && [regexp -nocase {^input\.} $to]} { |
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| 312 | after cancel [itcl::code $this run] |
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| 313 | after idle [itcl::code $this run] |
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| 314 | } |
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| 315 | } |
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