Monitoring progress by adding a single node

Keep users informed

Some operations in applications may take a long time. For instance, loading data from an external source or running an algorithm on a large graph. In these situations, you want to keep your users informed by providing them with visual and meaningful feedback. The same applies when you iterate through a list. In that case, users want to receive visual updates on the processed items. Adding a progress indicator is a good solution in both situations.

A single node makes all the difference

Graphileon nodes are functions. The one in this example is a so-called HtmlView, that displays an Html widget, inside of which we put a textarea, that is updated every time an incoming TRIGGER is fired. You can use the TRIGGER payload to set the message that appears in the log. It has a batch TRIGGER that points to itself to clear its contents.

If you want to add a progress indicator to your Graphileon configuration, you can add the function and the batch trigger by running the Cypher statement below against your application store.

// WARNING
// The Cypher statement below does not take into account any existing data in the database 
// you are running it against.
// It may cause conflicts (e.g. with existing constraints), or produce other undesired side effects 
// (e.g. change results of existing queries).
// It is therefore highly recommended to create a backup of your graph database before 
// executing the statement.

CREATE (_267152:`DUMP`:`IA_Function` {
`#logEntries:evaluate`: 'full',
`container.height`: '400',
`$template`: '
<textarea style="height:95%; width:95%;" id="qvFPAgvR5dEcWHJH">{{#logEntries}}
{{.}}{{/logEntries}}
</textarea>

<script>
let $textarea = $(\'#qvFPAgvR5dEcWHJH\');
$textarea.scrollTop($textarea[0].scrollHeight);
</script>',
`container.closable`: 'true',
`name`: 'Progress',
`$area`: 'sidebar-right',
`type`: 'HtmlView',
`uuid`: 'd978f150-b529-11ea-a47d-0242f63b198c',
`container.id`: 'progress',
`#logEntries`: '[]',
`$_instance`: 'progressView'
}) 
CREATE (_267152)-[:`TRIGGER` {
`action`: 'clear',
`#logEntries:evaluate`: 'full',
`type`: 'batch',
`uuid`: 'e7e3e420-b529-11ea-a47d-0242f63b198c',
`#logEntries`: '[]'
}]->(_267152)

Triggers that point to the HtmlView should update the contents of the log by putting properties on the trigger, like the ones below.

{
  "$_update.add.logEntries": "'Data loading started at ' +now()",
  "$_update.add.logEntries:evaluate": "full"
}


An interactive diagram that illustrates the approach is available here. To see it in action, watch the video below.

 


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Get started with Graphileon Personal Edition in the cloud or on your desktop.

The easiest way to get to know Graphileon is to spin up the Personal Edition in the Graphileon Cloud. It comes with two graph stores installed and access to the App Library with examples and apps. You can also download and install Graphileon Personal Edition to run it on your desktop. Either way, you will be able to build graphy applications an browse your graph stores in a way you never did before.