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https://github.com/koreader/koreader
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A BackgroundRunner plugin instance will stop running (rescheduling a check every 2 seconds) when there is no (or no more) job to run. Clients of this service now have to emit an event after adding a job into PluginShare.backgroundJobs, so an already loaded but stopped BackgroundRunner can notice it and start running again.
39 lines
1010 B
Lua
39 lines
1010 B
Lua
--[[--
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BackgroundTaskPlugin creates a plugin with a switch to enable or disable it and executes a
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background task.
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See spec/unit/background_task_plugin_spec.lua for the usage.
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]]
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local PluginShare = require("pluginshare")
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local SwitchPlugin = require("ui/plugin/switch_plugin")
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local BackgroundTaskPlugin = SwitchPlugin:extend()
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function BackgroundTaskPlugin:_schedule(settings_id)
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local enabled = function()
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if not self.enabled then
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return false
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end
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if settings_id ~= self.settings_id then
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return false
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end
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return true
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end
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table.insert(PluginShare.backgroundJobs, {
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when = self.when,
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repeated = enabled,
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executable = self.executable,
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})
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local Event = require("ui/event")
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local UIManager = require("ui/uimanager")
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UIManager:broadcastEvent(Event:new("BackgroundJobsUpdated"))
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end
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function BackgroundTaskPlugin:_start()
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self:_schedule(self.settings_id)
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end
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return BackgroundTaskPlugin
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