1 00:00:00,610 --> 00:00:05,170 In this video, we are going to develop our SDK application. 2 00:00:05,620 --> 00:00:12,030 So basically we are going to add an Amazon SDK SKU into our Halo CDK stack. 3 00:00:12,580 --> 00:00:20,470 So as you remember that in this diagram we have a double SDK application, which name is Halo CDK and 4 00:00:20,470 --> 00:00:23,800 we have a one stack, Halo, CDK stack. 5 00:00:23,920 --> 00:00:32,240 And now I'm going to create an X construct into our stick in order to deploy using database transformation. 6 00:00:32,730 --> 00:00:36,520 So now we are in the development phase for that reason. 7 00:00:36,700 --> 00:00:48,130 PS Open the Our Halo CD K application, close this terminal and open the Live for the Halo CD case type 8 00:00:48,130 --> 00:00:49,010 secret clause. 9 00:00:49,600 --> 00:00:50,560 Okay, very good. 10 00:00:50,710 --> 00:00:58,870 The CD case Amazon is case support is part of its main library a list CDK has main library. 11 00:00:58,870 --> 00:01:00,320 Which name is the ADA? 12 00:01:00,340 --> 00:01:02,440 Ada CD k live library. 13 00:01:02,440 --> 00:01:04,840 So we don't need to install another library. 14 00:01:04,870 --> 00:01:07,450 We can see there is some import statements in here. 15 00:01:07,450 --> 00:01:11,980 So we are using the main library which includes all of the details. 16 00:01:12,010 --> 00:01:15,700 We don't need to install a separate library. 17 00:01:16,180 --> 00:01:16,870 Okay. 18 00:01:17,140 --> 00:01:21,910 So first of all, let me show you the package JSON dependencies. 19 00:01:21,910 --> 00:01:28,150 But before that, we can just define an Amazon case in this stack using the using the case construct. 20 00:01:28,300 --> 00:01:35,290 Here is an example already in place on our code with commented, we will writing from scratch and you 21 00:01:35,290 --> 00:01:39,730 can see one import statement in here and also we have an example of source in here. 22 00:01:39,910 --> 00:01:46,600 So before that I would like to see package JSON, open the package JSON and make sure that on the dependencies 23 00:01:46,600 --> 00:01:49,960 you have a CDK library. 24 00:01:49,960 --> 00:01:55,660 This is the main library that includes all of the level two constructs which defined. 25 00:01:55,660 --> 00:02:02,700 So this package have almost all the level to construct defined and we can use them into our Stick+ OC 26 00:02:02,800 --> 00:02:10,570 Very good to open the hello CDK TypeScript secret class and you can uncomment the queue part or we can 27 00:02:10,570 --> 00:02:12,160 write it together. 28 00:02:12,580 --> 00:02:16,360 Let me refactor or writing from scratch. 29 00:02:16,480 --> 00:02:22,510 So I would like to write from the beginning with you in order to do that. 30 00:02:24,650 --> 00:02:27,560 I'm creating a new career defining. 31 00:02:28,780 --> 00:02:35,590 Q definition in here is you can say that this is like creating a variable, right? 32 00:02:35,590 --> 00:02:41,850 I'm creating a Q variable in here and basically instantiate with nib. 33 00:02:41,890 --> 00:02:52,150 Q You can see that we have also autocomplete and once I am click these enter the Q clause under the 34 00:02:52,570 --> 00:02:54,940 seed Caleb Edwards case. 35 00:02:55,510 --> 00:03:01,900 You can see the one import statement is automatically added, which is the import. 36 00:03:01,930 --> 00:03:07,930 Q From the a seed Caleb slash a Douglass asks so very good. 37 00:03:08,110 --> 00:03:13,190 This is the level to construct which defined by the seed team. 38 00:03:13,990 --> 00:03:14,720 Which name is. 39 00:03:14,740 --> 00:03:21,140 Q These are predefined constructs, including required configurations, IAM permissions and so on. 40 00:03:21,160 --> 00:03:27,370 You remember the level to construct which is developed by Cdcc team and it is handled lots of predefined 41 00:03:27,580 --> 00:03:35,170 configurations and lots of permission issues they are solving into the Cdcc and Cdcc has lots of level 42 00:03:35,170 --> 00:03:38,380 two constructs that I will show you later how we can see it. 43 00:03:38,380 --> 00:03:45,460 Define for example, HDD Bucket Lambda Functions API gateway is grace and sass advantage and so on. 44 00:03:45,460 --> 00:03:50,740 We will develop all these these kind of level two constructs into our application. 45 00:03:51,700 --> 00:03:58,300 So now it is important to know that this is the defined construct and we will create an instance and 46 00:03:58,300 --> 00:03:59,970 it required some parameters. 47 00:03:59,980 --> 00:04:06,640 If you go to definition of Q, if you right click and go to definition or collective 12, you can see 48 00:04:06,640 --> 00:04:08,440 the constructor in here. 49 00:04:08,860 --> 00:04:12,250 So see that there are three parameter requirements. 50 00:04:12,310 --> 00:04:13,630 The first one is the scope. 51 00:04:13,810 --> 00:04:17,830 Scope basically tests the queue that the stake is in Sprint. 52 00:04:17,830 --> 00:04:23,380 So it is a scope indicating the parent, it is defined within the scope of the stack. 53 00:04:23,380 --> 00:04:31,570 So you can define the construct inside of the construct, creating a higher hierarchical construct tree. 54 00:04:31,570 --> 00:04:37,120 So here and in most cases the scope is using this keyword. 55 00:04:37,600 --> 00:04:41,860 So a meaning that this construct that contains the Q in the state. 56 00:04:42,190 --> 00:04:50,770 So once we are creating a queue, we are placing this cable in here in order to adding to record in 57 00:04:50,770 --> 00:04:51,610 the stack. 58 00:04:51,610 --> 00:04:58,090 Or you can also define hierarchical construct three with pacing the construct in in this place. 59 00:04:58,540 --> 00:05:06,940 Okay, the second parameter is the ID ID is the logical ID of the queue within the CDK application. 60 00:05:07,090 --> 00:05:14,300 This name, plus a hash based generated uniquely identifies name will be assigned by the one deploying 61 00:05:14,320 --> 00:05:15,160 the application. 62 00:05:15,820 --> 00:05:23,830 So that means, for example, I'm giving the name McHugh and also a double is adding McHugh plus hash 63 00:05:23,860 --> 00:05:30,730 generated unique identifier number or keyword that we are going to deploy our application. 64 00:05:30,730 --> 00:05:35,890 We see this unique identifier like wheat or hash based parameter. 65 00:05:35,890 --> 00:05:39,340 The name is generated by the alias OC. 66 00:05:39,370 --> 00:05:41,980 The third parameter is props. 67 00:05:42,550 --> 00:05:47,400 That means properties, a bundle of values that define properties of the Q. 68 00:05:47,440 --> 00:05:52,080 Here we have defined only one property, which is the visibility timeout. 69 00:05:52,210 --> 00:05:56,170 You can go back in here and see the property definition in here. 70 00:05:56,410 --> 00:06:02,800 They are setting the visibility timeout property, but you can see all properties under the Q properties. 71 00:06:03,430 --> 00:06:03,950 Okay. 72 00:06:04,240 --> 00:06:08,890 We basically set only visible the timeout, which enables the visible timeout for the Q. 73 00:06:09,340 --> 00:06:16,180 So all constructs take these same tree elements when you see when you see the any level to construct, 74 00:06:16,540 --> 00:06:17,380 construct. 75 00:06:18,310 --> 00:06:22,300 Every construct has three parameter one creating this construct. 76 00:06:23,350 --> 00:06:27,940 So these are the three arguments, always the same for the old constructs. 77 00:06:27,940 --> 00:06:35,050 So it is easy to stay oriented as you learn about the new ones and as you might expect, you can subclass 78 00:06:35,050 --> 00:06:40,750 any construct to extend it, suite your needs or you just change its default values. 79 00:06:41,470 --> 00:06:48,160 Now it's come back to our main stick+ and now I'm continuing to creating an Amazon case. 80 00:06:48,160 --> 00:06:55,870 So once we run into Q, we basically automatically importing the Q statement from the SDK library, 81 00:06:56,170 --> 00:07:00,040 and now I am going to define these three parameter. 82 00:07:00,070 --> 00:07:08,950 If you open your bracket, you can see the inline explanation I'm going to now giving the scope and 83 00:07:08,950 --> 00:07:11,170 pasting this cable to construct. 84 00:07:11,170 --> 00:07:17,200 By this way, this means that my stick+ under the mistake we are going to create a queue. 85 00:07:17,470 --> 00:07:22,810 So that means if you come here under the stick, I'm going to create a SGS queue. 86 00:07:22,840 --> 00:07:30,790 So in code way we passing this keyword and putting comma and now it's time to my name. 87 00:07:30,790 --> 00:07:34,770 I can basically say that halo cdk. 88 00:07:38,240 --> 00:07:38,730 True. 89 00:07:39,350 --> 00:07:48,290 So once when we are deploying this stick, it is adding some hash numbers and deploying with Disney. 90 00:07:50,360 --> 00:07:53,990 So the last parameter is the props. 91 00:07:54,020 --> 00:07:56,300 You can see the Q props in here. 92 00:07:56,660 --> 00:07:59,300 I'm going to open a curly bracket. 93 00:07:59,300 --> 00:08:08,360 And if you hit the control and space, you can see the available properties about the Q definition. 94 00:08:08,390 --> 00:08:14,240 There are lots of definitions that you can see that as you can see this very powerful that you are using 95 00:08:14,360 --> 00:08:18,410 with any Visual Studio code or any programming language. 96 00:08:18,440 --> 00:08:20,570 You can see the in line explanation. 97 00:08:20,570 --> 00:08:23,830 So for example, I'm using the visibility timeout. 98 00:08:23,840 --> 00:08:31,430 You can see that we can basically set the visible timeout by giving a defining under the Q props. 99 00:08:31,700 --> 00:08:40,430 So basically I'm giving the duration that things if you write the duration, you can see also duration 100 00:08:40,430 --> 00:08:43,280 comes from the CDK based library. 101 00:08:43,550 --> 00:08:48,910 And with duration I would like to get the seconds to 300. 102 00:08:48,920 --> 00:08:51,530 So that means 5 minutes visible to timeout. 103 00:08:53,750 --> 00:08:54,470 That's all. 104 00:08:54,500 --> 00:08:59,810 With this line of code, we are creating the Amazon case under the our CDK.