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In this video we are going to understand how a lambda triggered with event json object.

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You can see the image.

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We are creating an event and trigger a lambda function code and arrange and develop our function code

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with incoming JSON object.

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Let's get started.

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Please open the A machine console and go to Lambda functions.

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Create a function.

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We use a lambda function for the backend or API.

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For this example, I also and also during the course, I would like to use Node.js versions as a runtime

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so the function name will be the new function and runtime should be the Node.js and architecture live

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as it is and the permission leave as it is and click the create function.

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This is a standard lambda function and this example function returns a 200 response to client and the

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text will be the halo from the lambda.

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If you scroll down, you can see the code section is the standard lambda function.

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It is turning source code and the button information.

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Okay.

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Before we start, first of all, we should understand how a lambda triggered with the event JSON objects.

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So we opened our lambda function and go to the test section.

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So if you scroll down under the test, you can see that these are the test events we set that lambda

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triggered with events, so we should provide at least one event from anywhere.

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So in this test section, we can invoke our function with a test event.

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Also, we can choose a template I will show you soon, but let's see this helloworld template.

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If you scroll down, you can see the templates by default it's coming the Helloworld template and this

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is the Helloworld template event object so we can give the name.

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The test you want.

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And if you scroll down.

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Select the template helloworld and scroll up.

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We can see the save button and click the test button, but before click the test button you can check

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the event JSON object.

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So that means we will send this JSON object to our lambda function.

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So let's click the test button and see how we can send these images.

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Okay.

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So as you can see that the execution result is succeed and if you expand these details, you can see

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the source code is 280 is hello from lambda function.

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So we can successfully invoke our lambda function but we don't interact with the incoming even JSON

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object yet.

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So if you look at the our code window, we don't have any interaction with this even JSON object, we

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only return this response.

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But we should also interact with the event JSON object because now we are know that we are sending this

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information about this Helloworld JSON object and we can interact with these attributes, which is the

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key 1 to 3.

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So let's modify our code with getting and writing events value from the Lambda function.

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I'm going to modify our lambda function in the management console, but you can get the quote from the

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OR.

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We just do code window under lecture 60.

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If you go to index JS, you can see that this is the are updated code.

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So I would like to also log into incoming event.

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So basically in this line of code, we are logging the incoming event JSON object as adjacent structure

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and after that we will interact incoming event object attributes.

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So event is key 1 to 3 attributes so that we can interact with logging this information.

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And after that we have returned the first key of the event JSON object.

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So this is our updated code.

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So that's why let's copy this in line of the code and code, go back to our dashboard management console

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and please remove this line of codes and paste in here.

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Of course we should deploy for the deploying our function and now we can test again with this event

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object.

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We verified that our event will be this way key.

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One, two, three and one, two, three.

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If I click the test button now, I'm going to interact with the incoming event JSON object and return

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back to volume one.

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So how we can interact that we can check from the monitoring with this function.

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If you go to monitor and we include watch logs, we will see the logs on the cloud watch.

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And if you open the latest logs, you can see that the first line of two are logging the incoming event.

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This is the incoming event that we verified from the Lambda function and these are the logs that we

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are logging in for logs, volume one, volume two and three.

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And the last operation is returning to volume one operation.

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So we can verify that this is the following the same steps that we develop in our function.

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You can see the function code in here and we have verified that we proceed these lines and execute to

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logs, right, to logs in this way.

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Okay.

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We verified that.

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Understand that when we send any test or lambda function, we are signing these event JSON objects and

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we can interact with evaluation object to reaching these attributes into our code of the lambda function.

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So you can see that we have locked every item into event request and return back to volume one.

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In the next video.

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We will continue to do some advanced event objects.