functions/objectcache.ps1
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<# .Synopsis Stores an object in in-memory cache. The object is valid as long as lockfile has not changed #> function set-cachedobject([Parameter(Mandatory=$true)]$lockfile, [Parameter(Mandatory=$true)]$object) { if (!(test-path $lockfile)) { throw "lock file '$lockfile' not found" } $f = gi $lockfile $ts = $f.LastWriteTimeUtc $global:cache[$lockfile] = @{ ts = $ts value = $object file = (gi $lockfile).FullName } } <# .Synopsis Returns an object from in-memory cache that is locked by specified lockfile. If lockfile was modified since the object was cached, returns $null. #> function get-cachedobject([Parameter(Mandatory=$true)]$lockfile) { if (!(test-path $lockfile)) { throw "lock file '$lockfile' not found" } if ($global:cache[$lockfile] -ne $null) { $f = gi $lockfile $ts = $f.LastWriteTimeUtc if ($ts -le $global:cache[$lockfile].ts) { return $global:cache[$lockfile] } } return $null } |