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These are the user uploaded subtitles that are being translated: 1 1 00:00:01,474 --> 00:00:02,767 Wow, we did some great stuff 2 2 00:00:02,767 --> 00:00:05,221 in that last video so we're pretty much taken care of. 3 3 00:00:05,221 --> 00:00:08,819 We've covered steps one, steps two and step three, 4 4 00:00:08,819 --> 00:00:10,423 so we're ready to go. 5 5 00:00:10,423 --> 00:00:11,330 So, what we're gonna do now 6 6 00:00:11,330 --> 00:00:15,903 is actually move into our main application class. 7 7 00:00:15,903 --> 00:00:18,230 We'll make use of the beans from Spring 8 8 00:00:18,230 --> 00:00:19,608 and then call some methods on it. 9 9 00:00:19,608 --> 00:00:22,191 So, let's go ahead and dive in. 10 10 00:00:24,483 --> 00:00:25,468 Alright, so let's go ahead 11 11 00:00:25,468 --> 00:00:27,419 and move back to our main application class, 12 12 00:00:27,419 --> 00:00:29,353 our HelloSpringApp, 13 13 00:00:29,353 --> 00:00:31,360 and this is basically everything from before, 14 14 00:00:31,360 --> 00:00:32,894 so we go through it and retrieve the bean 15 15 00:00:32,894 --> 00:00:34,382 from the container myCoach 16 16 00:00:34,382 --> 00:00:38,382 but now this bean actually has some dependencies, right? 17 17 00:00:38,382 --> 00:00:40,403 The dependency meaning the FortuneService, 18 18 00:00:40,403 --> 00:00:44,417 so it actually injects that FortuneService 19 19 00:00:44,417 --> 00:00:46,903 onto that bean, so when we get the bean, 20 20 00:00:46,903 --> 00:00:50,438 we actually get the bean fully assembled. 21 21 00:00:50,438 --> 00:00:54,019 Remember, the Spring factory, they're actually gonna create 22 22 00:00:54,019 --> 00:00:56,898 all the appropriate beans and dependencies 23 23 00:00:56,898 --> 00:00:59,396 and inject those dependencies 24 24 00:00:59,396 --> 00:01:00,904 so you can make use of them, 25 25 00:01:00,904 --> 00:01:03,656 so you'll get a object that's fully assembled, 26 26 00:01:03,656 --> 00:01:06,402 ready to go, so your car has already been built, 27 27 00:01:06,402 --> 00:01:10,171 you simply drive it off the showroom floor. 28 28 00:01:10,171 --> 00:01:11,240 Now that that's taken care of, 29 29 00:01:11,240 --> 00:01:13,202 we simply call methods on the bean 30 30 00:01:13,202 --> 00:01:15,706 and let's go ahead and call the new methods 31 31 00:01:15,706 --> 00:01:19,456 that we actually have for our FortuneService. 32 32 00:01:21,669 --> 00:01:25,197 So, here I just simply do system out print line, 33 33 00:01:25,197 --> 00:01:28,114 and I say theCoach.getDailyFortune. 34 34 00:01:31,710 --> 00:01:34,122 Fortune, nice, I like that. 35 35 00:01:34,122 --> 00:01:34,955 And that's really it. 36 36 00:01:34,955 --> 00:01:37,151 We simply added a new method to support 37 37 00:01:37,151 --> 00:01:39,986 the new functionality that we just added 38 38 00:01:39,986 --> 00:01:42,128 to this application. 39 39 00:01:42,128 --> 00:01:43,199 So, that's cool. 40 40 00:01:43,199 --> 00:01:45,654 Everything else in this app stays the same. 41 41 00:01:45,654 --> 00:01:48,568 There's no major changes here. 42 42 00:01:48,568 --> 00:01:49,839 Alright, let's go ahead and run it. 43 43 00:01:49,839 --> 00:01:52,922 Right click, run as Java application. 44 44 00:01:55,041 --> 00:01:57,374 And voila, this looks great. 45 45 00:01:59,081 --> 00:02:00,709 So, we got our daily workout 46 46 00:02:00,709 --> 00:02:03,496 but now note this item here, 47 47 00:02:03,496 --> 00:02:05,944 today is your lucky day. 48 48 00:02:05,944 --> 00:02:08,084 This is awesome because you're lucky today 49 49 00:02:08,084 --> 00:02:09,597 because you have a Spring app 50 50 00:02:09,597 --> 00:02:13,611 that's actually running using dependency injection 51 51 00:02:13,611 --> 00:02:16,709 and IoC and all those other fancy buzzwords, 52 52 00:02:16,709 --> 00:02:20,044 so you're ready to hang out with your buddies and brag. 53 53 00:02:20,044 --> 00:02:21,854 But anyway, this is cool. 54 54 00:02:21,854 --> 00:02:22,925 I'm having so much fun here. 55 55 00:02:22,925 --> 00:02:24,462 So, we got this working, it's running 56 56 00:02:24,462 --> 00:02:27,112 and we went through all of the whole process 57 57 00:02:27,112 --> 00:02:30,945 step by step, so I'm pretty excited right now. 58 58 00:02:32,789 --> 00:02:34,032 Now let's go back in here 59 59 00:02:34,032 --> 00:02:35,897 and let's make some changes. 60 60 00:02:35,897 --> 00:02:38,454 Let's go ahead and drop in our TrackCoach, 61 61 00:02:38,454 --> 00:02:41,950 so our TrackCoach can also make use of the FortuneService 62 62 00:02:41,950 --> 00:02:45,099 'cause hey, we don't wanna leave anyone out, right? 63 63 00:02:45,099 --> 00:02:46,520 So, we're gonna give equal preference 64 64 00:02:46,520 --> 00:02:50,042 to all of the sports at our university. 65 65 00:02:50,042 --> 00:02:53,710 So, here we have our private FortuneService, 66 66 00:02:53,710 --> 00:02:55,668 service, FortuneService here, 67 67 00:02:55,668 --> 00:02:56,859 so that's for TrackCoach. 68 68 00:02:56,859 --> 00:03:00,319 Our TrackCoach also needs a constructor 69 69 00:03:00,319 --> 00:03:02,114 to support constructor injection. 70 70 00:03:02,114 --> 00:03:03,976 I'm gonna show you a nice little trick. 71 71 00:03:03,976 --> 00:03:07,649 So, right click, go to source, K, one more time, 72 72 00:03:07,649 --> 00:03:09,768 right click, source and choose 73 73 00:03:09,768 --> 00:03:13,815 generate constructor using fields, whoa. 74 74 00:03:13,815 --> 00:03:14,982 So, with that. 75 75 00:03:17,438 --> 00:03:19,584 So, Eclipse will actually look at the fields 76 76 00:03:19,584 --> 00:03:21,583 that you have in your class 77 77 00:03:21,583 --> 00:03:23,721 and it'll actually create a constructor 78 78 00:03:23,721 --> 00:03:25,343 using those fields, 79 79 00:03:25,343 --> 00:03:28,106 so here we have this one field called FortuneService 80 80 00:03:28,106 --> 00:03:30,947 and we can keep all the other defaults 81 81 00:03:30,947 --> 00:03:32,265 and then we can actually move down 82 82 00:03:32,265 --> 00:03:34,817 and hit the OK button 83 83 00:03:34,817 --> 00:03:38,687 and Eclipse will actually generate some code for us. 84 84 00:03:38,687 --> 00:03:40,125 Boo, booya. 85 85 00:03:40,125 --> 00:03:42,999 So, what we see right here on lines seven through nine, 86 86 00:03:42,999 --> 00:03:46,055 this is a constructor that Eclipse created 87 87 00:03:46,055 --> 00:03:47,628 and it created it based on the fields 88 88 00:03:47,628 --> 00:03:48,679 that we have this class. 89 89 00:03:48,679 --> 00:03:50,532 Really cool, I like this feature. 90 90 00:03:50,532 --> 00:03:51,415 And it's very flexible, 91 91 00:03:51,415 --> 00:03:54,705 you can turn it on and off if you have multiple fields, 92 92 00:03:54,705 --> 00:03:56,498 but anyway, that covers it for right now. 93 93 00:03:56,498 --> 00:03:59,274 So, we have our constructor set up for injection, 94 94 00:03:59,274 --> 00:04:00,413 now in the bottom here 95 95 00:04:00,413 --> 00:04:02,284 we're actually gonna use this service, 96 96 00:04:02,284 --> 00:04:04,010 so again, getDailyFortune, 97 97 00:04:04,010 --> 00:04:06,927 we'll say fortuneService.getFortune 98 98 00:04:08,822 --> 00:04:09,940 and for this TrackCoach 99 99 00:04:09,940 --> 00:04:12,159 they're gonna use something a little fancy here. 100 100 00:04:12,159 --> 00:04:12,992 They're gonna add 101 101 00:04:12,992 --> 00:04:15,156 their own little message on the beginning. 102 102 00:04:15,156 --> 00:04:16,073 Just do it. 103 103 00:04:18,243 --> 00:04:20,542 Famous commercial, 104 104 00:04:20,542 --> 00:04:23,030 just do it and then they'll drop in a fortuneService, 105 105 00:04:23,030 --> 00:04:25,093 just a little custom implementation 106 106 00:04:25,093 --> 00:04:26,539 just so that we know the TrackCoach 107 107 00:04:26,539 --> 00:04:28,916 is really doing something differently 108 108 00:04:28,916 --> 00:04:31,271 than you know, the BaseballCoach. 109 109 00:04:31,271 --> 00:04:33,861 Alright, so we have that saved. 110 110 00:04:33,861 --> 00:04:38,363 Now in our config file we just swap out BaseballCoach 111 111 00:04:38,363 --> 00:04:40,780 and we'll drop in TrackCoach. 112 112 00:04:42,648 --> 00:04:44,981 And we'll save that, hit OK. 113 113 00:05:01,166 --> 00:05:02,965 Alright, so let's go ahead and right click and run it, 114 114 00:05:02,965 --> 00:05:05,088 so right click, run as Java application, 115 115 00:05:05,088 --> 00:05:09,401 and oh my gosh, an error exists in the project. 116 116 00:05:09,401 --> 00:05:11,151 Yikes, what happened? 117 117 00:05:12,034 --> 00:05:14,486 MyApp, what's up with that? 118 118 00:05:14,486 --> 00:05:16,013 Oh, got you. 119 119 00:05:16,013 --> 00:05:19,763 This is our old rough prototype from earlier. 120 120 00:05:20,844 --> 00:05:22,444 For know let's comment it out. 121 121 00:05:22,444 --> 00:05:24,137 I'll come back and fix it later 122 122 00:05:24,137 --> 00:05:26,424 but just for now I don't wanna deal with it for right now, 123 123 00:05:26,424 --> 00:05:28,356 so I just hit some comments there, 124 124 00:05:28,356 --> 00:05:31,612 save it and now I'll go back and run it. 125 125 00:05:31,612 --> 00:05:33,439 I'll fix that later, so, 126 126 00:05:33,439 --> 00:05:35,598 and I'll actually fix it in this video, 127 127 00:05:35,598 --> 00:05:39,739 so right click, run as, Java application. 128 128 00:05:39,739 --> 00:05:41,358 Don't want to steal my thunder here 129 129 00:05:41,358 --> 00:05:44,869 because I'm on a role, run a hard 5 K from the TrackCoach 130 130 00:05:44,869 --> 00:05:48,820 and boom, just do it, today is your lucky day. 131 131 00:05:48,820 --> 00:05:53,238 Cool, so our TrackCoach is also serving up fortunes 132 132 00:05:53,238 --> 00:05:55,321 which is really cool, so. 133 133 00:05:57,982 --> 00:05:58,815 I'm happy. 134 134 00:05:59,944 --> 00:06:01,096 And I'm speechless. 135 135 00:06:01,096 --> 00:06:01,929 Yikes. 136 136 00:06:04,049 --> 00:06:06,494 Alright, so let's go back and fix that issue 137 137 00:06:06,494 --> 00:06:09,081 that we had before, set up MyApp. 138 138 00:06:09,081 --> 00:06:11,023 So, we just comment it out with some code 139 139 00:06:11,023 --> 00:06:12,407 but you know, how should we really, 140 140 00:06:12,407 --> 00:06:14,711 what's the real solution here? 141 141 00:06:14,711 --> 00:06:17,127 And the real solution is that over on the left-hand side 142 142 00:06:17,127 --> 00:06:19,303 they're trying to create a TrackCoach 143 143 00:06:19,303 --> 00:06:21,260 but we don't have a no-arg constructor 144 144 00:06:21,260 --> 00:06:23,530 or we don't have a default constructor, 145 145 00:06:23,530 --> 00:06:26,503 so we need to add that to the class. 146 146 00:06:26,503 --> 00:06:29,170 So, I can simply just hover over 147 147 00:06:30,049 --> 00:06:31,719 or actually I can just go ahead and type it in myself, 148 148 00:06:31,719 --> 00:06:33,181 I'll go ahead and do it the long way. 149 149 00:06:33,181 --> 00:06:35,089 So, I can go back to my TrackCoach class 150 150 00:06:35,089 --> 00:06:39,128 and I simply need to create a no argument constructor. 151 151 00:06:39,128 --> 00:06:40,961 So, public TrackCoach, 152 152 00:06:43,817 --> 00:06:46,309 open param and close param, 153 153 00:06:46,309 --> 00:06:47,650 and then there we go. 154 154 00:06:47,650 --> 00:06:48,932 So, this is kinda of a hack, 155 155 00:06:48,932 --> 00:06:50,349 not totally ideal 156 156 00:06:51,477 --> 00:06:53,625 but anyway, this will help us out 157 157 00:06:53,625 --> 00:06:55,371 when we get to the setter injection stuff. 158 158 00:06:55,371 --> 00:06:57,600 So anyway, I'll kind of leave it for now. 159 159 00:06:57,600 --> 00:06:59,761 There are minor issue here or there 160 160 00:06:59,761 --> 00:07:01,895 but we'll worry about that later. 161 161 00:07:01,895 --> 00:07:04,758 So anyway, that takes care of the actual compile issue 162 162 00:07:04,758 --> 00:07:06,444 and we're good to go. 163 163 00:07:06,444 --> 00:07:07,822 so, I think we're in good shape here. 164 164 00:07:07,822 --> 00:07:09,091 I mean, we covered on all 165 165 00:07:09,091 --> 00:07:12,505 of the basic constructor injection stuff 166 166 00:07:12,505 --> 00:07:15,099 with dependency injection. 167 167 00:07:15,099 --> 00:07:16,432 Good job, whoa. 13928