com.fulcrologic.fulcro.algorithms.tx-processing — com.fulcrologic/fulcro 3.4.3

The transaction processing in Fulcro is (intended to be) pluggable. This namespace is the implementation for the default transaction processing . At the present time there is no documentation on how such an override would be written, nor is it necessarily recommended since many of the desirable and built-in behaviors of Fulcro are codified here.

abort! clj/s

(abort! app abort-id)

Implementation of abort when using this tx processing

abort-remote! clj/s

(abort-remote! app-ish remote)

Cause everything in the active network queue for remote to be cancelled. Any result that (finally) appears for aborted items will be ignored. This will cause a hard error to be "received" as the result for everything that is in the send queue of the given remote.

This function is mainly meant for use in development mode when dealing with a buggy remote implementation.

activate-submissions! clj/s

(activate-submissions! {:keys [:com.fulcrologic.fulcro.application/runtime-atom]
                        :as app})

Activate all of the transactions that have been submitted since the last activation. After the items are activated a single processing step will run for the active queue.

Activation can be blocked by the tx-node options for things like waiting for the next render frame.

active-remotes clj/s

(active-remotes queue remotes)

Calculate which remotes still have network activity to do on the given active queue.

add-send! clj/s

(add-send! {:com.fulcrologic.fulcro.application/keys [runtime-atom] :as app}
           {:com.fulcrologic.fulcro.algorithms.tx-processing/keys [id options]
            :as tx-node}
           ele-idx
           remote)

Generate a new send node and add it to the appropriate send queue. Returns the new send node.

advance-actions! clj/s

(advance-actions! app
                  {:com.fulcrologic.fulcro.algorithms.tx-processing/keys
                     [id elements]
                   :as node})

Runs any incomplete and non-blocked optimistic operations on a node.

app->remote-names clj/s

(app->remote-names app)

Returns a set of the names of the remotes from an app

app->remotes clj/s

(app->remotes app)

Returns the remotes map from an app

application-rendered! clj/s

(application-rendered! {:keys [:com.fulcrologic.fulcro.application/runtime-atom]
                        :as app}
                       options)

Should be called after the application renders to ensure that transactions blocked until the next render become unblocked. Schedules an activation.

build-env clj/s

(build-env app
           {:keys [:com.fulcrologic.fulcro.algorithms.tx-processing/options]
            :as tx-node})

(build-env app
           {:com.fulcrologic.fulcro.algorithms.tx-processing/keys [options]
            :as tx-node}
           addl)

combine-sends clj/s

(combine-sends app remote-name send-queue)

Takes a send queue and returns a map containing a new combined send node that can act as a single network request, along with the updated send queue.

compute-desired-ast-node clj/s

(compute-desired-ast-node app remote tx-node tx-element)

Add the ::desired-ast-nodes and ::transmitted-ast-nodes for remote to the tx-element based on the dispatch for the remote of the original mutation.

default-tx! clj/s

(default-tx! app tx)

(default-tx! {:com.fulcrologic.fulcro.application/keys [runtime-atom] :as app}
             tx
             {:keys [synchronous?] :as options})

Default (Fulcro-2 compatible) transaction submission. The options map can contain any additional options that might be used by the transaction processing (or UI refresh).

Some that may be supported (depending on application settings):

• :optimistic? - boolean. Should the transaction be processed optimistically?
• :ref - ident. The component ident to include in the transaction env.
• :component - React element. The instance of the component that should appear in the transaction env.
• :refresh - Vector containing idents (of components) and keywords (of props). Things that have changed and should be re-rendered on screen. Only necessary when the underlying rendering algorithm won't auto-detect, such as when UI is derived from the state of other components or outside of the directly queried props. Interpretation depends on the renderer selected: The ident-optimized render treats these as "extras".
• :only-refresh - Vector of idents/keywords. If the underlying rendering configured algorithm supports it: The components using these are the only things that will be refreshed in the UI. This can be used to avoid the overhead of looking for stale data when you know exactly what you want to refresh on screen as an extra optimization. Idents are not checked against queries.

WARNING: :only-refresh can cause missed refreshes because rendering is debounced. If you are using this for rapid-fire updates like drag-and-drop it is recommended that on the trailing edge (e.g. drop) of your sequence you force a normal refresh via app/render!.

If the options include :ref (which comp/transact! sets), then it will be auto-included on the :refresh list.

NOTE: Fulcro 2 'follow-on reads' are supported and are added to the :refresh entries. Your choice of rendering algorithm will influence their necessity.

Returns the transaction ID of the submitted transaction.

dispatch-elements clj/s

(dispatch-elements tx-node env dispatch-fn)

Run through the elements on the given tx-node and do the side-effect-free dispatch. This generates the dispatch map of things to do on that node.

dispatch-result! clj/s

(dispatch-result! app
                  tx-node
                  {:com.fulcrologic.fulcro.algorithms.tx-processing/keys
                     [results dispatch desired-ast-nodes transmitted-ast-nodes
                      original-ast-node]
                   :as tx-element}
                  remote)

Figure out the dispatch routine to trigger for the given network result. If it exists, send the result to it.

Returns the tx-element with the remote marked complete.

distribute-element-results! clj/s

(distribute-element-results!
  app
  tx-node
  {:keys [:com.fulcrologic.fulcro.algorithms.tx-processing/results
          :com.fulcrologic.fulcro.algorithms.tx-processing/complete?]
   :as tx-element})

Distribute results and mark the remotes for those elements as complete.

distribute-results! clj/s

(distribute-results!
  app
  {:keys [:com.fulcrologic.fulcro.algorithms.tx-processing/elements]
   :as tx-node})

Walk all elements of the tx-node and call result dispatch handlers for any results that have not been distributed.

element-with-work clj/s

(element-with-work
  remote-names
  {:keys [:com.fulcrologic.fulcro.algorithms.tx-processing/dispatch
          :com.fulcrologic.fulcro.algorithms.tx-processing/started?]
   :as element})

Returns a txnode element iff it has remaining (remote) work that has not been queued. Returns nil if there is no such element.

remote-names is the set of legal remote names.

every-ast? clj/s

(every-ast? ast-node-or-tree test)

Check if the given test predicate is true for an AST node or for all the immediate children of an AST tree.

extract-parallel clj/s

(extract-parallel sends)

Splits the given send queue into two send queues: [parallel-items sequential-items].

fully-complete? clj/s

(fully-complete? app
                 {:keys
                    [:com.fulcrologic.fulcro.algorithms.tx-processing/elements]
                  :as tx-node})

idle-node? clj/s

(idle-node? {:keys [:com.fulcrologic.fulcro.algorithms.tx-processing/elements]
             :as tx-node})

Returns true if the given node has no active network operations.

mutation-ast? clj/s

(mutation-ast? ast-node-or-tree)

Returns true if the given AST node or tree represents a mutation or sequence of mutations.

net-send! clj/s

(net-send! app send-node remote-name)

Process the send against the user-defined remote. Catches exceptions and calls error handler with status code 500 if the remote itself throws exceptions.

process-queue! clj/s

(process-queue!
  {:com.fulcrologic.fulcro.application/keys [state-atom runtime-atom] :as app})

Run through the active queue and do a processing step.

process-send-queues! clj/s

(process-send-queues! {:com.fulcrologic.fulcro.application/keys [runtime-atom]
                       :as app})

Process the send queues against the remotes. Updates the send queues on the app and returns the updated send queues.

process-tx-node! clj/s

(process-tx-node! app
                  {:keys
                     [:com.fulcrologic.fulcro.algorithms.tx-processing/options]
                   :as tx-node})

query-ast? clj/s

(query-ast? ast-node-or-tree)

Returns true if the given AST node or tree represents a mutation or sequence of mutations.

queue-element-sends! clj/s

(queue-element-sends!
  app
  tx-node
  {:keys [:com.fulcrologic.fulcro.algorithms.tx-processing/idx
          :com.fulcrologic.fulcro.algorithms.tx-processing/dispatch
          :com.fulcrologic.fulcro.algorithms.tx-processing/started?]})

Queue all (unqueued) remote actions for the given element. Returns the (possibly updated) node.

queue-next-send! clj/s

(queue-next-send! app
                  {:keys
                     [:com.fulcrologic.fulcro.algorithms.tx-processing/elements]
                   :as tx-node})

Assumes tx-node is to be processed pessimistically. Queues the next send if the node is currently idle on the network and there are any sends left to do. Adds to the send queue, and returns the updated tx-node.

queue-sends! clj/s

(queue-sends! app
              {:keys [:com.fulcrologic.fulcro.algorithms.tx-processing/options
                      :com.fulcrologic.fulcro.algorithms.tx-processing/elements]
               :as tx-node})

Finds any item(s) on the given node that are ready to be placed on the network queues and adds them. Non-optimistic multi-element nodes will only queue one remote operation at a time.

record-result! clj/s

(record-result! app txn-id ele-idx remote result)

(record-result! {:com.fulcrologic.fulcro.application/keys [runtime-atom]
                 :as app}
                txn-id
                ele-idx
                remote
                result
                result-key)

Record a network result on the given txn/element. If result-key is given it is used, otherwise defaults to ::results. Also removes the network send from the send queue so that remaining items can proceed, and schedules send processing.

remotes-active-on-node clj/s

(remotes-active-on-node
  {:com.fulcrologic.fulcro.algorithms.tx-processing/keys [elements] :as tx-node}
  remotes)

Given a tx node and the set of legal remotes: returns a set of remotes that are active on that node.

remove-send! clj/s

(remove-send! {:com.fulcrologic.fulcro.application/keys [runtime-atom] :as app}
              remote
              txn-id
              ele-idx)

Removes the send node (if present) from the send queue on the given remote.

requested-refreshes clj/s

(requested-refreshes app queue)

run-actions! clj/s

(run-actions! app
              {:com.fulcrologic.fulcro.algorithms.tx-processing/keys [id
                                                                      elements]
               :as node})

schedule-activation! clj/s

(schedule-activation! app)

(schedule-activation! app tm)

Schedule activation of submitted transactions. The default implementation copies all submitted transactions onto the active queue and immediately does an active queue processing step. If tm is not supplied (in ms) it defaults to 10ms.

schedule-queue-processing! clj/s

(schedule-queue-processing! app)

(schedule-queue-processing! app tm)

Schedule a processing of the active queue, which will advance the active transactions by a step. If tm is not supplied (in ms) it defaults to 10ms.

schedule-sends! clj/s

(schedule-sends! app)

(schedule-sends! app tm)

Schedule actual network activity. If tm is not supplied (in ms) it defaults to 0ms.

sort-queue-writes-before-reads clj/s

(sort-queue-writes-before-reads send-queue)

Sort function on a send queue. Leaves any active nodes in front, and sorts the remainder of the queue so that writes appear before reads, without changing the relative order in blocks of reads/writes.

top-keys clj/s

(top-keys {:keys [type key children] :as ast})

transact-sync! clj/s

(transact-sync! app tx {:keys [component] :as options})

Run the optimistic action(s) of a transaction synchronously. It is primarily used to deal with controlled inputs, since they have issues working asynchronously, so ideally the mutation in question will not have remote action (though they are allowed to).

NOTE: any remote behaviors of tx will still be async.

This function:

• Runs the optimistic side of the mutation(s)
• IF (and only if) one or more of the mutations has more sections than just an action then it submits the mutation to the normal transaction queue, but with the optimistic part already done.
• This functions does not queue a render refresh (though if the normal transaction queue is updated, it will queue tx remote processing, which will trigger a UI refresh).

If you pass it an on-screen instance that has a query and ident, then this function tunnel updated UI props synchronously to that component so it can refresh immediately and avoid DOM input issues.

Returns the new component props or the final state map if no component was used in the transaction.

tx-node clj/s

(tx-node tx)

(tx-node tx options)

update-progress! clj/s

(update-progress! app
                  {:keys
                     [:com.fulcrologic.fulcro.algorithms.tx-processing/elements]
                   :as tx-node})

Report all progress items to any registered progress dispatch and clear them from the tx-node. Returns the updated tx-node.