1 00:00:00,090 --> 00:00:05,910 In this video we are going to perform and to test of our hands on love, which is the final service 2 00:00:05,910 --> 00:00:08,720 architecture using Sanskrit and lambda. 3 00:00:08,730 --> 00:00:14,640 So that means we will start at this point in the client application and send a HTTP post request with 4 00:00:14,640 --> 00:00:16,890 the payload of the order created event. 5 00:00:16,890 --> 00:00:22,320 And these API gateway redirect to the lambda function, which is the order acknowledgement microservices. 6 00:00:22,320 --> 00:00:28,590 And in microservices we will validate the incoming request and save item in the order table and also 7 00:00:28,590 --> 00:00:32,310 publish message to Amazon Sans and return back the synchronous response. 8 00:00:32,310 --> 00:00:40,590 And after that Amazon is subscribed by the excuse these three to consume from the Amazon SAS and this 9 00:00:40,590 --> 00:00:43,590 will be added item into the queue. 10 00:00:43,590 --> 00:00:48,780 And these requests are consumed from the downstream microservices which are the notification inventory 11 00:00:48,780 --> 00:00:51,330 and shipment in the inventory of microservices. 12 00:00:51,330 --> 00:00:58,200 These will be pulled the case record item into lambda function and the invocation happens with the interaction 13 00:00:58,200 --> 00:01:00,600 with the inventory table on Dynamo DB. 14 00:01:00,600 --> 00:01:03,450 So save item in the event table. 15 00:01:03,600 --> 00:01:04,050 Okay. 16 00:01:04,050 --> 00:01:04,560 Very good. 17 00:01:04,560 --> 00:01:05,790 So let's get started. 18 00:01:05,790 --> 00:01:08,850 I'm going to start with the HTTP post request. 19 00:01:08,880 --> 00:01:12,210 We can get the payload from the command to text file. 20 00:01:12,210 --> 00:01:18,360 And if you go back to Postman, you can see that this is the our API gateway order endpoint that we 21 00:01:18,360 --> 00:01:22,260 are sending the ACG post request and we have already did before. 22 00:01:22,260 --> 00:01:25,230 And this is the payload of what we have sent in the last video. 23 00:01:25,230 --> 00:01:29,580 So I'm going to send the same payload and see what's happened from the inventory side. 24 00:01:29,580 --> 00:01:33,090 Click the send button and this will be returned back to us. 25 00:01:33,090 --> 00:01:38,970 Synchronous Success Message That means order create operation successfully happened and the message 26 00:01:38,970 --> 00:01:45,240 is published to SNS topic and this topic will be consumed from subscribers as case topics. 27 00:01:45,240 --> 00:01:52,080 So let's open the A management console and see the tables of the Dynamo TV. 28 00:01:52,080 --> 00:01:56,940 So I'm going to look at the directly from the inventory table if there is an item. 29 00:01:56,940 --> 00:01:59,460 So that means we it is consumed successfully. 30 00:01:59,460 --> 00:02:04,800 And when you open the inventory table, you can see that the item is created successfully. 31 00:02:04,830 --> 00:02:11,460 So that means inventory microservice pulls the record item in the case and interact with the Dynamo 32 00:02:11,470 --> 00:02:14,250 DB At this item Dynamo DB table. 33 00:02:14,550 --> 00:02:20,220 As you can see, the code is the icon, which is the item, and the rest of the attributes comes from 34 00:02:20,220 --> 00:02:21,810 the JSON object. 35 00:02:21,810 --> 00:02:23,040 So very good. 36 00:02:23,040 --> 00:02:30,630 So let's open the inventory microservices, go to monitor and we will close and see how it is invocation 37 00:02:30,630 --> 00:02:31,080 happens. 38 00:02:31,080 --> 00:02:36,900 If you open the latest log stream, you can see that this is the incoming request from the case. 39 00:02:36,900 --> 00:02:38,250 This is the body information. 40 00:02:38,250 --> 00:02:43,920 And in the body information we have a message from the SNS topic and this is our actual attribute, 41 00:02:43,920 --> 00:02:46,920 actual object, which is the order created object. 42 00:02:46,920 --> 00:02:53,520 And if you scroll down you can see that we can see the record object and after that we can see the SNS 43 00:02:53,520 --> 00:02:54,990 message in here. 44 00:02:55,170 --> 00:02:58,590 After that you can see the our actual order data. 45 00:02:58,590 --> 00:03:03,180 So these are the steps what we have develop in the inventory database. 46 00:03:03,180 --> 00:03:09,420 And after that we are writing these item into dynamic DB and see that successfully create our Dynamo 47 00:03:09,630 --> 00:03:10,560 inventory table. 48 00:03:10,560 --> 00:03:15,600 The log should be changed and we have successfully perform the internal operation. 49 00:03:15,600 --> 00:03:21,750 So please open the architecture and we have verified that we sent request to client application and 50 00:03:21,750 --> 00:03:27,720 this will go to our inventory database from the space and write the item in the inventory table.