1 00:00:00,300 --> 00:00:06,660 In this video, we are going to develop the late product method for our product Lambda Microservices 2 00:00:06,660 --> 00:00:08,670 using the HDC packages. 3 00:00:08,910 --> 00:00:16,140 So that means we will accommodate the HTTP delete request from the client and Amazon API gateway into 4 00:00:16,140 --> 00:00:22,020 our product microservices lambda function and to perform delete item in Dynamo DB table. 5 00:00:22,800 --> 00:00:26,610 So in order to do that, please open the widgets to the code. 6 00:00:26,610 --> 00:00:33,360 And in here in the indexes, we basically accommodate the HTTP delete method. 7 00:00:33,390 --> 00:00:37,740 We're checking the exit method and case delete operation. 8 00:00:37,740 --> 00:00:42,360 So which event JS object comes from our switch statement. 9 00:00:42,360 --> 00:00:46,590 You can go to events and go to delete by ID JSON object. 10 00:00:46,620 --> 00:00:50,910 This object is exactly the same event that we will trigger. 11 00:00:50,940 --> 00:00:56,850 The our lambda function method will be the delete and the resource and pet in here. 12 00:00:56,850 --> 00:01:02,910 So in order to get a pet parameters, you can scroll down and see that we can get the pet parameters 13 00:01:02,910 --> 00:01:09,930 from the event dot pet parameters that ID information in order to delete an item in the existing Dynamo 14 00:01:09,930 --> 00:01:10,770 DB table. 15 00:01:11,040 --> 00:01:11,670 Okay. 16 00:01:11,670 --> 00:01:15,780 So let's get start to accommodate this HTTP delete operation. 17 00:01:15,780 --> 00:01:18,120 To do so, go to index case file. 18 00:01:18,150 --> 00:01:23,550 And basically I'm going to add a new case block after the post operation. 19 00:01:23,550 --> 00:01:24,840 This will be the. 20 00:01:25,960 --> 00:01:27,940 KS delete operation. 21 00:01:27,940 --> 00:01:36,820 Please add the next block, which is the delete operation and give the body of the statement as a delete 22 00:01:36,820 --> 00:01:37,900 product method. 23 00:01:37,900 --> 00:01:44,350 And this method get a parameter which is a product ID is the same way to get product. 24 00:01:44,380 --> 00:01:46,810 In this case, we will delete product by ID. 25 00:01:46,810 --> 00:01:54,400 So that's why we are placing event parameters ID to delete and specific ID to dynamic DB table. 26 00:01:54,640 --> 00:02:03,610 So after we have performed the switch case below, we are going to develop the delete product method. 27 00:02:03,700 --> 00:02:08,000 But before we implement, let's check the documentation. 28 00:02:08,020 --> 00:02:12,030 If you go to the documentation, you can see that we will use the late item command. 29 00:02:12,040 --> 00:02:18,270 If you go to delete item command, you can read what it is going to do and scroll down. 30 00:02:18,280 --> 00:02:24,970 You can see the example implementation and if you go to the input object, you can see the available 31 00:02:24,970 --> 00:02:29,320 properties that we will send as a parameter of delete item command. 32 00:02:29,530 --> 00:02:34,450 So please go back to our indexes and save our index file. 33 00:02:34,480 --> 00:02:37,940 Now I'm going to implement this delete product. 34 00:02:37,960 --> 00:02:39,740 To do so, please go. 35 00:02:39,760 --> 00:02:45,310 At the end of these indexes and we will create a new method. 36 00:02:45,340 --> 00:02:46,420 You can come here. 37 00:02:46,420 --> 00:02:49,350 Let me copy paste in here and explain after that. 38 00:02:49,360 --> 00:02:55,120 So this is the delete product method, which is getting product ID as a parameter. 39 00:02:55,120 --> 00:03:00,560 And we will use this product ID when we are deleting an item. 40 00:03:00,580 --> 00:03:05,320 Before explaining these methods, let me add a required package. 41 00:03:05,320 --> 00:03:11,470 See that we have all of the import marshal and in this case, the only thing that we should import the 42 00:03:11,470 --> 00:03:17,980 delete item command, please copy this command or come here, click the control space and go on top 43 00:03:17,980 --> 00:03:25,900 of the page and make sure that you have edit delete item command into the client dynamic DB package 44 00:03:25,900 --> 00:03:32,650 and make sure that you have import successfully if you go back to our method at the end of the page. 45 00:03:32,650 --> 00:03:35,410 So let me explain this method one by one. 46 00:03:35,830 --> 00:03:44,410 So basically we will start with covering try case below to avoid any unexpected exception and follow 47 00:03:44,410 --> 00:03:49,900 the exception from the Amazon Cloud, which looks after that we perform the log operation to identify 48 00:03:49,900 --> 00:03:56,650 where in the delete product method and after that we basically create a parameter object. 49 00:03:56,950 --> 00:04:03,940 You can come here and see the parameter object and let me make it more clean. 50 00:04:03,940 --> 00:04:04,390 Okay. 51 00:04:04,540 --> 00:04:09,700 We have created a parameter object with pasting the table name and the key information. 52 00:04:09,700 --> 00:04:15,400 In the key information we basically passing the ID of the table because ID is partitioned and primary 53 00:04:15,400 --> 00:04:18,640 key and with using Marshall it is very simplify. 54 00:04:18,670 --> 00:04:22,330 Otherwise, for example, this is an example key definition. 55 00:04:22,360 --> 00:04:27,190 Otherwise we should pass the ID information as a specifying number and the value. 56 00:04:27,280 --> 00:04:33,010 Instead of that, we use the Marshall operation with directly passing the ID information without specifying 57 00:04:33,010 --> 00:04:34,480 any data type. 58 00:04:34,480 --> 00:04:40,930 And after we have completed the parameters, we pass these parameters into delete item command and using 59 00:04:40,930 --> 00:04:41,770 the dynamo db. 60 00:04:41,800 --> 00:04:48,490 Send a bait method in order to perform delete operation and response back to the later result logging 61 00:04:48,490 --> 00:04:52,720 and return back these delete that to the delete product function. 62 00:04:52,720 --> 00:04:58,300 So as you can see that we have developed this delete product function. 63 00:04:58,300 --> 00:05:00,850 So in the next video we will see other methods.