1 00:00:00,360 --> 00:00:04,860 In this video, we are going to create a rest API for our hands on lab. 2 00:00:04,920 --> 00:00:08,550 We'll create microservices with Rest API and lambda function. 3 00:00:08,850 --> 00:00:16,260 So as you can see the image, we are going to create a rest API and we are exposing these these methods. 4 00:00:16,500 --> 00:00:23,070 S&P method get product, get product, buy ID, post product, delete product by ID. 5 00:00:23,100 --> 00:00:30,060 So we will create these resource and method types into the rest API using the measurement console. 6 00:00:30,060 --> 00:00:31,650 So let's get started. 7 00:00:32,160 --> 00:00:34,800 Please open the A measurement console. 8 00:00:34,890 --> 00:00:37,680 In the last few years we have created product API. 9 00:00:37,830 --> 00:00:40,800 I would like to delete this one and create from the secret. 10 00:00:40,830 --> 00:00:46,440 Let's delete this product API and now we are going to create a rest API. 11 00:00:46,440 --> 00:00:54,420 So rest API provides provides and rest http and print for our lambda functions API gateway ROS to request 12 00:00:54,420 --> 00:00:57,900 to our lambda function and then returns the function response to the client. 13 00:00:58,140 --> 00:01:05,130 So in order to create this API, we should go to API Gateway and connect the rest API with button. 14 00:01:05,280 --> 00:01:09,810 So this will be redirecting to us, creating any rest API. 15 00:01:09,810 --> 00:01:17,400 So basically select the protocol as a rest and create an API and give the API name as a product. 16 00:01:17,400 --> 00:01:23,250 This API and end point type should be the regional and click the create button. 17 00:01:24,940 --> 00:01:30,670 So now we can design our HTTP methods according to our architecture. 18 00:01:30,700 --> 00:01:35,800 As you remember that our architecture in here, we will create these HTTP methods and resources. 19 00:01:35,860 --> 00:01:41,900 As you can see, that product should be the resource and the methods should be the get post and delete. 20 00:01:41,920 --> 00:01:47,050 So let's apply these into a major console for the rest API. 21 00:01:47,170 --> 00:01:49,950 We should start with the resource types. 22 00:01:49,960 --> 00:01:57,700 So if you click the actions and create resources, I'm going to create a resource which name is product? 23 00:01:57,820 --> 00:02:04,270 So we don't set any proxy for the product resources and we will create resources. 24 00:02:05,190 --> 00:02:09,040 So now under the product we can apply the HTTP methods. 25 00:02:09,060 --> 00:02:11,700 So I would like to start with the create method. 26 00:02:11,700 --> 00:02:14,850 So select these actions in the dropdown. 27 00:02:14,850 --> 00:02:19,590 This time we will create method, but make sure that you have selected these product resources. 28 00:02:19,710 --> 00:02:21,570 Actions create method. 29 00:02:21,570 --> 00:02:24,600 So I'm going to create get method. 30 00:02:24,810 --> 00:02:29,040 You can click this button and we have created the get method. 31 00:02:29,040 --> 00:02:32,430 So now integration type should be the lambda function. 32 00:02:32,430 --> 00:02:35,970 So we have set the integration type as a lambda function. 33 00:02:35,970 --> 00:02:41,130 But there's another complication which is the use lambda proxy integration. 34 00:02:41,130 --> 00:02:48,510 We should also check this box because this is basically redirect the request to the lambda function 35 00:02:48,510 --> 00:02:52,320 with request it is available in the event JSON file. 36 00:02:52,320 --> 00:02:54,990 So that's why I would like to check this box. 37 00:02:54,990 --> 00:02:57,870 And also we should provide the lambda function. 38 00:02:57,870 --> 00:03:02,070 If you write the product, it is com product page function. 39 00:03:02,070 --> 00:03:09,420 So now we are ready to set integration or http get method to do lambda function, click the say button, 40 00:03:09,420 --> 00:03:11,490 make sure that you have checked this box. 41 00:03:11,490 --> 00:03:18,360 Also because we write our code into lambda function according to this invocation, click the save button 42 00:03:18,360 --> 00:03:24,840 and it is said that you are about to give API Gateway permission to invoke your lambda function. 43 00:03:24,840 --> 00:03:31,230 So basically when we are clicked, okay, this will be required permissions to the lambda function. 44 00:03:31,230 --> 00:03:33,690 Lambda function has resource based policies. 45 00:03:33,720 --> 00:03:39,450 This will be automatically create a resource based policy to invoke lambda function from the list API 46 00:03:39,450 --> 00:03:46,680 gateway, click the okay button and this will be prepared or http get method for the product resources. 47 00:03:46,680 --> 00:03:48,720 We can see the get product request. 48 00:03:48,720 --> 00:03:55,110 So we finish the first part and you can see the Lambda Proxy and invoke the lambda function, which 49 00:03:55,110 --> 00:03:56,370 is the product function. 50 00:03:56,370 --> 00:04:03,390 So I will also follow the same steps for the post because we have get product and the post product. 51 00:04:03,390 --> 00:04:07,560 So that's why select the product resource actions create method. 52 00:04:07,560 --> 00:04:14,130 And this time I'm going to select the post and click this check icon and select integration type lambda 53 00:04:14,130 --> 00:04:16,860 function use lambda proxy integration. 54 00:04:17,100 --> 00:04:24,150 Choose the lambda function as a product function and click the say button and give the permission with 55 00:04:24,150 --> 00:04:24,570 clicking. 56 00:04:24,570 --> 00:04:25,110 Okay. 57 00:04:27,310 --> 00:04:34,690 As you can see that we have created get and post method for the products and it is adding the required 58 00:04:34,690 --> 00:04:40,760 permissions to lambda invocations and we are ready for the get and post operations. 59 00:04:40,780 --> 00:04:45,490 Now we have also two more API methods. 60 00:04:45,490 --> 00:04:47,590 You can see that we finished get and post. 61 00:04:47,620 --> 00:04:48,550 Now we should. 62 00:04:49,210 --> 00:04:52,930 They will hope to get product by ID and delete product by ID. 63 00:04:52,960 --> 00:05:00,310 For that reason we should come back to product section and after that we should create any resource 64 00:05:00,310 --> 00:05:07,180 pet with the ID information, let me click the product resource actions create resources. 65 00:05:07,180 --> 00:05:11,140 This time I'm going to add a resource with the ID information. 66 00:05:11,140 --> 00:05:19,720 So because we will get the ID, I can say the source name is a ID or get by ID product by ID you can 67 00:05:19,720 --> 00:05:21,340 give what you name it. 68 00:05:21,340 --> 00:05:27,250 So now we can click the create resource to complete this operation. 69 00:05:28,500 --> 00:05:35,580 So now it is ready for the product by ID, but we should also add the required method under the product 70 00:05:35,580 --> 00:05:37,170 ID for that purpose. 71 00:05:37,170 --> 00:05:45,990 Come to actions and create method and I'm going to create a get product by ID for that purpose at the 72 00:05:45,990 --> 00:05:50,430 get method and click this icon and select the lambda function. 73 00:05:50,850 --> 00:05:55,560 Use Lambda Proxy Integration CheckBox and right on the product function. 74 00:05:55,950 --> 00:05:59,220 Just click the save button, give required permission. 75 00:05:59,220 --> 00:06:07,320 So this is the get product by ID HTTP method and is the same way I'm going to add another method which 76 00:06:07,320 --> 00:06:14,160 is the delete is remember that we will lead by ID also I will follow the same configurations. 77 00:06:14,160 --> 00:06:19,050 Please make sure that you have also checked this box and set the integration type lambda. 78 00:06:19,080 --> 00:06:21,510 Give the function name and click button. 79 00:06:22,580 --> 00:06:23,210 Okay. 80 00:06:23,420 --> 00:06:32,300 So as you can see that now we have complete our methods, get and post product, get and delete buy 81 00:06:32,300 --> 00:06:34,370 ID product by ID operations. 82 00:06:34,370 --> 00:06:39,200 So now every method integrate with the same lambda function. 83 00:06:39,200 --> 00:06:42,980 So now we can deploy our API in the last step. 84 00:06:42,980 --> 00:06:49,190 We need to deploy our API so that we can access through the public for that purpose, come to product 85 00:06:49,190 --> 00:06:53,660 resources, go to the actions and click to deploy API. 86 00:06:53,660 --> 00:06:59,150 So in the deployment stage it is required a stage, so we should create a new stage. 87 00:06:59,150 --> 00:07:03,740 So I'm going to create a production stage and click the deploy button. 88 00:07:05,950 --> 00:07:13,870 So you can see the an invocation URL generated from the API gateway and we will try to accessing the 89 00:07:13,870 --> 00:07:16,210 URL from the web browser or the postman. 90 00:07:16,300 --> 00:07:22,630 So in order to test our API, we will test our API to make sure that it is working or not. 91 00:07:23,020 --> 00:07:25,870 We will use a web browser to invoke our API. 92 00:07:25,900 --> 00:07:32,590 If you right click open the top and you can see the missing authentication token because our raw definition 93 00:07:32,590 --> 00:07:33,400 is different. 94 00:07:33,430 --> 00:07:40,420 We can come here under the stage, open the production, and click the get button and see the correct 95 00:07:40,450 --> 00:07:42,340 URL that we can invoke. 96 00:07:42,370 --> 00:07:46,090 Adding the appending slash product right click opening top. 97 00:07:46,120 --> 00:07:49,860 You can see that this is invoke to a lambda function. 98 00:07:49,870 --> 00:07:52,690 See that response come from the lambda function. 99 00:07:52,690 --> 00:07:55,690 So that means we have created successfully. 100 00:07:55,810 --> 00:08:00,960 As you can see that we have developed Lambda Synchronous Microservices with API Gateway in the rest 101 00:08:00,970 --> 00:08:02,560 API and HTTP methods.