Class: Volt::Tasks
Overview
The tasks class provides an interface to call tasks on the backend server. This class is setup as page.task (as a singleton)
Instance Method Summary collapse
- #call(class_name, method_name, meta_data, *args) ⇒ Object
-
#initialize(volt_app) ⇒ Tasks
constructor
A new instance of Tasks.
-
#notify_query(method_name, collection, query, *args) ⇒ Object
Called when the backend sends a notification to change the results of a query.
- #received_message(name, promise_id, *args) ⇒ Object
- #reload ⇒ Object
-
#response(promise_id, result, error, cookies) ⇒ Object
When a request is sent to the backend, it can attach a callback, this is called from the backend to pass to the callback.
Constructor Details
#initialize(volt_app) ⇒ Tasks
Returns a new instance of Tasks.
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# File 'lib/volt/page/tasks.rb', line 7 def initialize(volt_app) @volt_app = volt_app @promise_id = 0 @promises = {} volt_app.channel.on('message') do |*args| (*args) end end |
Instance Method Details
#call(class_name, method_name, meta_data, *args) ⇒ Object
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# File 'lib/volt/page/tasks.rb', line 17 def call(class_name, method_name, , *args) promise_id = @promise_id @promise_id += 1 # Track the callback promise = Promise.new @promises[promise_id] = promise # TODO: Timeout on these callbacks @volt_app.channel.([promise_id, class_name, method_name, , *args]) promise end |
#notify_query(method_name, collection, query, *args) ⇒ Object
Called when the backend sends a notification to change the results of a query.
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# File 'lib/volt/page/tasks.rb', line 69 def notify_query(method_name, collection, query, *args) query_obj = Persistors::ArrayStore.query_pool.lookup(collection, query) query_obj.send(method_name, *args) end |
#received_message(name, promise_id, *args) ⇒ Object
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# File 'lib/volt/page/tasks.rb', line 31 def (name, promise_id, *args) case name when 'added', 'removed', 'updated', 'changed' notify_query(name, *args) when 'response' response(promise_id, *args) when 'reload' reload end end |
#reload ⇒ Object
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# File 'lib/volt/page/tasks.rb', line 74 def reload # Stash the current page value begin value = EJSON.stringify(Volt.current_app.page.to_h) # If this browser supports session storage, store the page, so it will # be in the same state when we reload. `sessionStorage.setItem('___page', value);` if `sessionStorage` rescue EJSON::NonEjsonType => e # Unable to serailize the page, ignore stashing it # clear the ___page stash `sessionStorage.removeItem('___page');` end Volt.current_app.page._reloading = true `window.location.reload(false);` end |
#response(promise_id, result, error, cookies) ⇒ Object
When a request is sent to the backend, it can attach a callback, this is called from the backend to pass to the callback.
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# File 'lib/volt/page/tasks.rb', line 44 def response(promise_id, result, error, ) # Set the cookies if .each do |key, value| @volt_app..set(key, value) end end promise = @promises.delete(promise_id) if promise if error # TODO: full error handling Volt.logger.error('Task Response:') Volt.logger.error(error) promise.reject(error) else promise.resolve(result) end end end |