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These are the user uploaded subtitles that are being translated: 1 1 00:00:01,120 --> 00:00:02,140 Alrighty, so let's go ahead 2 2 00:00:02,140 --> 00:00:03,880 and move into Eclipse. 3 3 00:00:03,880 --> 00:00:06,040 Looking at our development process, 4 4 00:00:06,040 --> 00:00:08,010 the first thing we want to do is define methods 5 5 00:00:08,010 --> 00:00:10,560 for init and destroy. 6 6 00:00:10,560 --> 00:00:12,370 So I'll go ahead and do this here. 7 7 00:00:12,370 --> 00:00:16,160 I'll make use of my TrackCoach.java class. 8 8 00:00:16,160 --> 00:00:18,310 So let's go ahead and move into this class. 9 9 00:00:19,520 --> 00:00:21,710 And we are going to just open it up. 10 10 00:00:22,720 --> 00:00:26,410 And we'll simply scroll down a bit 11 11 00:00:26,410 --> 00:00:29,360 to the bottom, and we'll define those new methods. 12 12 00:00:33,060 --> 00:00:34,630 So again, I always like to drop in 13 13 00:00:34,630 --> 00:00:38,670 some quick comments here just so I keep myself on track. 14 14 00:00:41,140 --> 00:00:42,800 So I want to add an init method, 15 15 00:00:42,800 --> 00:00:44,500 and I want to add a destroy method. 16 16 00:00:44,500 --> 00:00:47,770 So again, this is custom code that will execute 17 17 00:00:47,770 --> 00:00:49,090 during the bean's lifecycle, 18 18 00:00:49,090 --> 00:00:50,100 when the bean's being created 19 19 00:00:50,100 --> 00:00:53,020 or the bean's being destroyed, our little custom hook. 20 20 00:00:56,692 --> 00:00:59,420 And now what I want to do, just inside of this method here, 21 21 00:00:59,420 --> 00:01:01,150 just print out a little message here 22 22 00:01:01,150 --> 00:01:03,410 just so I know I'm actually inside the method. 23 23 00:01:03,410 --> 00:01:07,440 So I'll say TrackCoach: inside method 24 24 00:01:07,440 --> 00:01:09,280 do my startup stuff. 25 25 00:01:09,280 --> 00:01:11,290 So just to make sure that spring's actually calling 26 26 00:01:11,290 --> 00:01:12,810 my initialization method. 27 27 00:01:12,810 --> 00:01:14,310 But that's basically it right there. 28 28 00:01:14,310 --> 00:01:15,960 So this looks pretty good so far. 29 29 00:01:20,200 --> 00:01:21,300 Alright, so let's move on down 30 30 00:01:21,300 --> 00:01:23,540 and let's do a similar thing in here for our destroy method. 31 31 00:01:23,540 --> 00:01:26,730 So again, this is a hook or a method that'll be called 32 32 00:01:26,730 --> 00:01:29,270 when your bean's actually being destroyed 33 33 00:01:29,270 --> 00:01:30,780 by the spring container. 34 34 00:01:30,780 --> 00:01:33,910 So I'll call this doMyStartupStuff, 35 35 00:01:36,720 --> 00:01:40,320 and I'll copy/paste the method down there. 36 36 00:01:40,320 --> 00:01:43,490 And I'll just copy/paste that method name, and ew. 37 37 00:01:43,490 --> 00:01:46,510 I notice this is the wrong method name. 38 38 00:01:46,510 --> 00:01:48,480 I have a typo here, so let me change this. 39 39 00:01:48,480 --> 00:01:53,480 So instead of doMyStartupStuff, doMyCleanupStuffYoYo. 40 40 00:01:53,890 --> 00:01:57,000 Alright, doMyCleanupStuff. 41 41 00:01:57,000 --> 00:01:57,833 So I'll copy/paste. 42 42 00:01:57,833 --> 00:01:58,666 I'll fix that issue. 43 43 00:01:58,666 --> 00:02:00,850 So again, that's different method names. 44 44 00:02:00,850 --> 00:02:02,010 So this is our destroy method, 45 45 00:02:02,010 --> 00:02:04,560 so I'll call it doMyCleanupStuffYoYo. 46 46 00:02:04,560 --> 00:02:06,540 And I'm being funny here just to verify 47 47 00:02:06,540 --> 00:02:09,460 that, hey, there's no special method naming convention. 48 48 00:02:09,460 --> 00:02:11,760 You can give it any method name that you want. 49 49 00:02:13,840 --> 00:02:14,680 Alright, so that looks good. 50 50 00:02:14,680 --> 00:02:18,000 So that's our init method, and that's our destroy method. 51 51 00:02:18,000 --> 00:02:19,000 Good job so far. 52 52 00:02:22,790 --> 00:02:25,870 Now let's go ahead and make use of a configuration file. 53 53 00:02:25,870 --> 00:02:27,300 And what I'm gonna do here is I'm gonna 54 54 00:02:27,300 --> 00:02:30,380 just kind of copy/paste a previous config file 55 55 00:02:30,380 --> 00:02:32,160 and simply make some changes to it. 56 56 00:02:32,160 --> 00:02:36,430 So I'm gonna copy/paste the beanScope-applicationContext.xml 57 57 00:02:36,430 --> 00:02:38,100 from the previous video. 58 58 00:02:38,100 --> 00:02:40,560 Simply do just a right-click and choose Copy 59 59 00:02:40,560 --> 00:02:43,060 and then a right-click and choose Paste. 60 60 00:02:43,060 --> 00:02:45,890 And then for the new name that I'll give here, 61 61 00:02:45,890 --> 00:02:49,930 I'll call it beanLifeCycle-applicationContext 62 62 00:02:49,930 --> 00:02:51,630 and remove the two at the end, .xml. 63 63 00:02:51,630 --> 00:02:53,940 So again, we can have multiple config files, right? 64 64 00:02:53,940 --> 00:02:56,210 So I'm just giving a unique name here 65 65 00:02:56,210 --> 00:02:57,610 for this demo project. 66 66 00:02:59,120 --> 00:03:01,050 And if you didn't complete the previous video, 67 67 00:03:01,050 --> 00:03:06,050 simply grab any one of your XML files and just rename it. 68 68 00:03:06,100 --> 00:03:07,290 So anyway, let's take a look 69 69 00:03:07,290 --> 00:03:10,319 at this beanLifeCycle-applicationContext.xml, 70 70 00:03:10,319 --> 00:03:12,500 and let's kind of expand the window here. 71 71 00:03:12,500 --> 00:03:14,150 And let's move down. 72 72 00:03:14,150 --> 00:03:15,580 Now there's one thing that's a leftover 73 73 00:03:15,580 --> 00:03:17,670 from the previous video as far as playing around 74 74 00:03:17,670 --> 00:03:18,870 with bean scopes. 75 75 00:03:18,870 --> 00:03:21,370 So on line 19, I'm gonna delete this entry, 76 76 00:03:21,370 --> 00:03:22,680 scope="prototype". 77 77 00:03:22,680 --> 00:03:25,270 I'm gonna remove that because I want to make use 78 78 00:03:25,270 --> 00:03:27,430 of simply just the default scope, right? 79 79 00:03:27,430 --> 00:03:31,630 And as a quiz question, the default scope is singleton. 80 80 00:03:31,630 --> 00:03:32,649 Alright. 81 81 00:03:32,649 --> 00:03:35,530 Now here, let's go ahead and add our init method. 82 82 00:03:36,540 --> 00:03:38,920 So we need to give the actual method name 83 83 00:03:38,920 --> 00:03:40,500 from our bean class. 84 84 00:03:40,500 --> 00:03:41,890 So I need to kind of move back over 85 85 00:03:41,890 --> 00:03:44,230 to my TrackCoach and find out which init method 86 86 00:03:44,230 --> 00:03:45,063 I'll use here. 87 87 00:03:45,063 --> 00:03:47,040 So I'll call it doMyStartupStuff. 88 88 00:03:47,040 --> 00:03:49,870 I'll simply copy that name, and then 89 89 00:03:49,870 --> 00:03:51,010 I'll simply paste it here. 90 90 00:03:51,010 --> 00:03:54,100 I use the keyboard for that, copy/paste. 91 91 00:03:54,100 --> 00:03:54,933 And there we go. 92 92 00:03:54,933 --> 00:03:55,766 So that's my init method. 93 93 00:03:55,766 --> 00:03:56,599 That's in place. 94 94 00:03:56,599 --> 00:03:58,510 Now let's do a similar thing here 95 95 00:03:58,510 --> 00:04:01,610 for the destroy method, so destroy-method equals. 96 96 00:04:01,610 --> 00:04:03,380 And again, I need to get that actual method name. 97 97 00:04:03,380 --> 00:04:06,690 So I'll kind of move back over to TrackCoach, 98 98 00:04:06,690 --> 00:04:08,070 and I'll copy that name. 99 99 00:04:10,230 --> 00:04:13,210 So it's doMyCleanupStuffYoYo. 100 100 00:04:16,042 --> 00:04:17,500 And then move back to the config, 101 101 00:04:17,500 --> 00:04:18,950 and then paste that in there. 102 102 00:04:20,570 --> 00:04:23,070 So that's our destroy method that spring will call 103 103 00:04:23,070 --> 00:04:25,780 when the bean is being destroyed. 104 104 00:04:33,910 --> 00:04:35,560 Alright, this looks pretty good. 105 105 00:04:35,560 --> 00:04:38,310 Now I need to have a main program to kind of run everything. 106 106 00:04:38,310 --> 00:04:39,620 So again, I'm gonna kind of copy 107 107 00:04:39,620 --> 00:04:41,820 one of my previous examples. 108 108 00:04:41,820 --> 00:04:43,410 We've been doing a lot of stuff from scratch. 109 109 00:04:43,410 --> 00:04:44,790 And here I'm just gonna copy this 110 110 00:04:44,790 --> 00:04:46,690 and just make some quick updates to it. 111 111 00:04:46,690 --> 00:04:50,525 So here, I'm gonna copy this BeanScopeDemoApp, 112 112 00:04:50,525 --> 00:04:54,160 BeanScopeDemoApp.java, tongue twister. 113 113 00:04:54,160 --> 00:04:57,870 I'll just copy that, and I will just paste it. 114 114 00:05:00,300 --> 00:05:03,142 And I'll give it a new name, so I'll call this 115 115 00:05:03,142 --> 00:05:08,142 BeanLifeCycleDemoApp, take off the two at the end. 116 116 00:05:09,260 --> 00:05:12,640 And if everything's okay, then we can click the OK button. 117 117 00:05:15,450 --> 00:05:17,970 Alright, so we should have this new file here, 118 118 00:05:17,970 --> 00:05:20,950 BeanLifeCycleDemoApp.java. 119 119 00:05:20,950 --> 00:05:22,360 So let's go ahead and double-click that one, 120 120 00:05:22,360 --> 00:05:24,640 open it up, expand the window. 121 121 00:05:24,640 --> 00:05:28,690 Cool, now the first thing I want to do here is on line 11 122 122 00:05:28,690 --> 00:05:31,260 where we have the actual file name. 123 123 00:05:31,260 --> 00:05:33,450 I want to change this file name 124 124 00:05:33,450 --> 00:05:37,150 to use my LifeCycle example. 125 125 00:05:37,150 --> 00:05:38,820 Right, so it has to say 126 126 00:05:38,820 --> 00:05:42,350 beanLifeCycle-applicationContext.xml. 127 127 00:05:42,350 --> 00:05:43,570 You want to make sure that it's calling 128 128 00:05:43,570 --> 00:05:46,460 the right config file for your application. 129 129 00:05:48,040 --> 00:05:50,630 Alright, and then we'll kind of scroll down a bit. 130 130 00:05:50,630 --> 00:05:53,400 I'll delete a lot of that other stuff that was there. 131 131 00:05:53,400 --> 00:05:56,670 So we should have just a very simple program right now. 132 132 00:05:56,670 --> 00:05:58,150 So again, we did a little copy/paste 133 133 00:05:58,150 --> 00:06:00,900 to kind of help us out, but just a real small program: 134 134 00:06:00,900 --> 00:06:02,430 load the config, retrieve the bean, 135 135 00:06:02,430 --> 00:06:03,580 and close the context. 136 136 00:06:05,070 --> 00:06:06,470 So just a little checkpoint to make sure 137 137 00:06:06,470 --> 00:06:08,620 we're on the same page here. 138 138 00:06:09,600 --> 00:06:11,050 And now I'm just gonna use the bean 139 139 00:06:11,050 --> 00:06:12,410 once I've retrieved it from the container. 140 140 00:06:12,410 --> 00:06:13,860 I'll just print out getDailyWorkout 141 141 00:06:13,860 --> 00:06:18,080 just to print something to the screen, nothing big there. 142 142 00:06:19,981 --> 00:06:23,600 And that's pretty much it for this little demo here 143 143 00:06:23,600 --> 00:06:24,640 for the LifeCycle. 144 144 00:06:26,820 --> 00:06:28,960 So we simply load the config file. 145 145 00:06:30,490 --> 00:06:33,460 We retrieve the bean from the container, 146 146 00:06:33,460 --> 00:06:38,460 call methods on it, and finally we close the spring context. 147 147 00:06:41,240 --> 00:06:42,073 Alright, so that's it. 148 148 00:06:42,073 --> 00:06:43,470 It looks good. 149 149 00:06:43,470 --> 00:06:44,440 BeanLifeCycleDemoApp, it's ready. 150 150 00:06:44,440 --> 00:06:47,510 Let's save it, and let's run it. 151 151 00:06:47,510 --> 00:06:49,930 Right-click, Run as Java Application. 152 152 00:06:52,090 --> 00:06:53,640 And cool, here's our output. 153 153 00:06:54,990 --> 00:06:57,090 So, a couple of things here. 154 154 00:06:57,090 --> 00:06:59,080 Make sure that it's reading from the right config file, 155 155 00:06:59,080 --> 00:07:02,210 beanLifeCycle-applicationContext.xml. 156 156 00:07:02,210 --> 00:07:05,420 So that's the correct file that we just created. 157 157 00:07:05,420 --> 00:07:07,170 We see that it's calling our method, 158 158 00:07:07,170 --> 00:07:10,800 inside method doMyStartupStuff, which is good. 159 159 00:07:10,800 --> 00:07:11,700 That's our init method. 160 160 00:07:11,700 --> 00:07:14,010 We call our daily workout which is great. 161 161 00:07:14,010 --> 00:07:16,390 And then we see when this container's closing, 162 162 00:07:16,390 --> 00:07:19,030 at the end it'll actually call our destroy method. 163 163 00:07:19,030 --> 00:07:21,460 So, inside method doMyCleanupStuffYoYo. 164 164 00:07:23,040 --> 00:07:23,873 So this is great. 165 165 00:07:23,873 --> 00:07:27,620 So spring's actually calling our init method as desired 166 166 00:07:27,620 --> 00:07:30,220 and it's also calling our destroy method. 167 167 00:07:30,220 --> 00:07:31,053 So this is great. 168 168 00:07:31,053 --> 00:07:33,260 So we can add our own custom hooks here 169 169 00:07:33,260 --> 00:07:37,590 into the spring bean lifecycle. 14469