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title	Use the Annotation Window to view your sample data in the String Viewing Window

Now we are in the Translator!

Every Translator component contains a Main.lua module with a main function that is called each time a message is received or on a configured poll time.

Notice we can see our sample data (variable named Data) passed to main functionby looking at the Annotation Windows.

If we click on the sample data in the annotations, we can view it using The string viewing window.

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title	Parse the JSON sample data using json.parse{data=Data}

In main, parse the JSON sample data by passing Data.

Code Block

language	lua

local patient = json.parse{data=Data}

JSON objects are parsed into Lua tables as dictionaries with key-value pairs. You can see this clearly in the Annotation Window.

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title	Create a filter function in filters.lua

Notice we are brought to an empty filters.lua script in the project tree. Lets add our filtering logic:

First, create your filter function Block statements and pass patient as the parameter.

Code Block

language	lua

function filter(patient)
   
end

Then go into main and call your filter function, passing your parsed patient JSON as the expected parameter.

Notice after calling our filter function, when we go back into filter.lua, there is now an annotation window we can use to add the rest of the logic.

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title	Now let's see our filtering in action by going through the sample data and viewing the annotations

By switching which Sample Data is being passed to main, we can see the results and test how our filter function works, by using the annotations.

Switch to the second sample data to see the sample message fail the condition and return false.

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title	Add custom logging to your filter to make it more comprehensive

Now that the annotations are active for the failed scenario, we can leverage them to add Custom Logging to add more visibility into the logs.

For example,

Code Block

language	lua

if domain == 'interfaceware.com' then
  return true
else 
  iguana.log('Filtered out message with: '..domain)   
  return false
end

You’re done the filter! Don’t forget to Commit and Push Changes to Git.

Versions Compared

Old Version 16

New Version 17

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