1 00:00:00,000 --> 00:00:18,360 I'm Jeff McCaffer, I work for IBM Rational in Ottawa, Canada, and I'm the Equinox project 2 00:00:18,360 --> 00:00:24,920 lead and the Eclipse RCP lead as well, and I've been working on Eclipse for probably 3 00:00:24,920 --> 00:00:30,560 seven or eight years now ever since the beginning before Eclipse was Eclipse, primarily focused 4 00:00:30,560 --> 00:00:35,500 as I say on Equinox, the runtime, and specifically the client platform. 5 00:00:36,040 --> 00:00:40,980 One of the things that Eclipse historically from five, seven years ago has always been 6 00:00:40,980 --> 00:00:44,720 thought of as a tooling, you know, a tooling platform, which can do a great job with development 7 00:00:44,720 --> 00:00:48,880 tools and C development tools, that sort of thing, and sort of three or four years ago 8 00:00:48,880 --> 00:00:54,040 there was a bit of a renaissance, if you will, and people started to realize that, hey, you 9 00:00:54,040 --> 00:00:59,040 know, that modularity system, all that monetized stuff that people are using to build really 10 00:00:59,040 --> 00:01:04,380 cool tools, we could do that to build our applications, and sort of Eclipse as a rich client platform 11 00:01:04,380 --> 00:01:08,540 was born at about that time, essentially in Eclipse 3.0. 12 00:01:09,860 --> 00:01:14,700 And if you step back from that, it's been very successful, we've really had a lot of people 13 00:01:14,700 --> 00:01:18,920 adopting it and being very successful with it, but if you step back and look and say, what 14 00:01:18,920 --> 00:01:24,340 is it that is the useful part of what's giving them all that success, it really will come 15 00:01:24,340 --> 00:01:29,700 down to some great APIs and great frameworks, but underlying all of that, a really strong 16 00:01:29,700 --> 00:01:35,120 component model, and that coincided, the sort of evolution of Eclipse of the rich client 17 00:01:35,120 --> 00:01:42,600 platform coincided with our adoption of the OSGI framework specification. 18 00:01:42,920 --> 00:01:49,920 So OSGI essentially specifies a run-time, modular run-time system for Java programs. 19 00:01:49,920 --> 00:01:54,920 So the Eclipse of the rich client platform is really cool and it's a success, and now people 20 00:01:54,920 --> 00:01:59,920 are saying, well, hey, you know that component programming model, that modularity system, we can 21 00:01:59,920 --> 00:02:01,920 apply that to the server too. 22 00:02:01,920 --> 00:02:08,920 So this is really, we're seeing Eclipse evolve as a server-side story now, and I know of several 23 00:02:08,920 --> 00:02:14,920 projects and products that are coming out, various companies adopting Eclipse, IBM, sorry Eclipse 24 00:02:14,920 --> 00:02:19,920 on the server, IBM's WIP, your application server, the newest version is actually running Eclipse 25 00:02:19,920 --> 00:02:20,920 under the covers. 26 00:02:20,920 --> 00:02:24,920 So when you're running WAS, you're actually running Eclipse under the covers. 27 00:02:24,920 --> 00:02:25,920 Right. 28 00:02:25,920 --> 00:02:28,920 And that's true of some other server vendors. 29 00:02:28,920 --> 00:02:35,920 So what we're seeing now is, the real value is, you can use the same programming model across 30 00:02:35,920 --> 00:02:38,920 desktop servers and handhelds. 31 00:02:38,920 --> 00:02:43,920 Whereas, you know, in the standard travel world, we've got J2SE, J2ME, and J2EE, which 32 00:02:43,920 --> 00:02:49,920 all have sort of different programming models to varying degrees and different class structures 33 00:02:49,920 --> 00:02:50,920 that's a good thing. 34 00:02:50,920 --> 00:02:54,920 And, you know, code that runs in one doesn't always run in the other. 35 00:02:54,920 --> 00:02:59,920 And what we see now with OSGI and Eclipse and Equinox is that you can take the same bundles 36 00:02:59,920 --> 00:03:02,920 and use them in these different areas. 37 00:03:02,920 --> 00:03:03,920 Right. 38 00:03:03,920 --> 00:03:08,920 So to illustrate that, what I thought I would do is show you a little bit about how easy it 39 00:03:08,920 --> 00:03:15,920 is to use Eclipse on the server side to develop some static content and some servlet content. 40 00:03:15,920 --> 00:03:21,920 Now, I'm not a web programmer, so the web content will actually be very trivial for the world 41 00:03:21,920 --> 00:03:23,920 kind of thing. 42 00:03:23,920 --> 00:03:28,920 But the interesting part is really driving how, looking at how the systems work. 43 00:03:28,920 --> 00:03:29,920 Yeah. 44 00:03:29,920 --> 00:03:35,920 So, if you look at the screen now, so we've got an entity workspace that's not that interesting. 45 00:03:35,920 --> 00:03:42,920 But we're targeting a standard Eclipse, you know, Eclipse 3.3 SDK, just out of the box, off the 46 00:03:42,920 --> 00:03:43,920 download server. 47 00:03:43,920 --> 00:03:48,920 And what we can do now is go ahead and say, "Make a new plugin project." 48 00:03:48,920 --> 00:03:51,920 And we'll just call it "Hello." 49 00:03:53,920 --> 00:03:57,920 And we don't have to do anything fancy, just create that. 50 00:03:57,920 --> 00:04:02,920 And now what we want to do is we actually want to create some static content. 51 00:04:02,920 --> 00:04:07,920 We'll start out simple and just make a simple HTML page and then contribute it to a web server. 52 00:04:07,920 --> 00:04:14,920 So, you go ahead and just make a new folder, say. 53 00:04:14,920 --> 00:04:18,920 And in that folder, we'll make a new file. 54 00:04:18,920 --> 00:04:23,920 I'll say, you know, "Hello, world." 55 00:04:23,920 --> 00:04:31,920 And save it in our little guy and we'll call it "Index studies." 56 00:04:31,920 --> 00:04:32,920 All right. 57 00:04:32,920 --> 00:04:35,920 So, that's pretty straightforward. 58 00:04:35,920 --> 00:04:37,920 Now, we've got some web content. 59 00:04:37,920 --> 00:04:38,920 Okay. 60 00:04:38,920 --> 00:04:42,920 So, now we want to hook that web content into a web server. 61 00:04:42,920 --> 00:04:45,920 Now, OSGI specifies this thing called the HTTP service. 62 00:04:45,920 --> 00:04:50,920 And basically, it can serve up content, static content or serverless. 63 00:04:50,920 --> 00:04:53,920 And we've extended it to be able to do JMPs and the like. 64 00:04:53,920 --> 00:05:00,920 And what you do in our intent piece of this is you actually just go and create an extension. 65 00:05:00,920 --> 00:05:02,920 Now, Eclipse has an extension point model. 66 00:05:02,920 --> 00:05:10,920 Once you've decomposed the system into a bunch of pieces, you then need a mechanism to weave it all back together to sort of form a solution to your application. 67 00:05:10,920 --> 00:05:11,920 Right, right. 68 00:05:11,920 --> 00:05:13,920 Have all the glue that connects everything together. 69 00:05:13,920 --> 00:05:14,920 Yeah, yeah. 70 00:05:14,920 --> 00:05:19,920 So, the standard Eclipse way of doing this is through the extension, extension point registry. 71 00:05:19,920 --> 00:05:23,920 And the standard OSGI way of doing it is through services. 72 00:05:23,920 --> 00:05:27,920 You know, we can get into a long discussion about what the difference is between those two. 73 00:05:27,920 --> 00:05:32,920 But for right now, for this demo, I'm going to show you how to do it declaratively with extensions. 74 00:05:32,920 --> 00:05:33,920 Okay. 75 00:05:33,920 --> 00:05:39,920 So, back here on the plugin editor page, on the overview page, and let's click on the extensions guy here. 76 00:05:39,920 --> 00:05:43,920 And I haven't created any extensions before, so I'll say yes, I want to show the extensions. 77 00:05:43,920 --> 00:05:46,920 And I'll say, well, I want to add an extension. 78 00:05:46,920 --> 00:05:52,920 And I'm going to add an -- I'm going to search for the extension point to extend. 79 00:05:52,920 --> 00:05:54,920 And I've got this resources one. 80 00:05:54,920 --> 00:06:01,920 So, I can -- I've got an extension point called resources that I can add an extension for. 81 00:06:01,920 --> 00:06:02,920 So, now here we go. 82 00:06:02,920 --> 00:06:03,920 I've got an alias. 83 00:06:03,920 --> 00:06:08,920 And an alias is sort of -- what I'm doing is I'm situating some static content in URL space. 84 00:06:08,920 --> 00:06:11,920 I'm going to contribute it to an HTTP service. 85 00:06:11,920 --> 00:06:15,920 And say, here, put this content someplace in the URL space. 86 00:06:15,920 --> 00:06:22,920 So, I'll just call it content, just for fun. 87 00:06:22,920 --> 00:06:25,920 And then we put it in web. 88 00:06:25,920 --> 00:06:26,920 Right? 89 00:06:26,920 --> 00:06:27,920 That was the directory. 90 00:06:27,920 --> 00:06:30,920 Base name is the directory of content that we have in the folder. 91 00:06:30,920 --> 00:06:31,920 Right. 92 00:06:31,920 --> 00:06:38,920 So, now we've got an extension that goes into the HTTP service and says, hey, I've got some content in the web 93 00:06:38,920 --> 00:06:40,920 directory of this bundle. 94 00:06:40,920 --> 00:06:43,920 And you should put it in URL space at slash content. 95 00:06:43,920 --> 00:06:44,920 Right. 96 00:06:44,920 --> 00:06:49,920 So, we're sort of configuring the web server, as it were, by telling it where we're putting our content. 97 00:06:49,920 --> 00:06:50,920 Yeah. 98 00:06:50,920 --> 00:06:52,920 And the neat thing is we're doing this inside of a bundle. 99 00:06:52,920 --> 00:06:56,920 And bundles are sort of self-contained units of function. 100 00:06:56,920 --> 00:06:58,920 So, I can -- and a versions and -- 101 00:06:58,920 --> 00:06:59,920 Right. 102 00:06:59,920 --> 00:07:04,920 So, I could even specify dependencies between just static content bundles. 103 00:07:04,920 --> 00:07:05,920 Sure. 104 00:07:05,920 --> 00:07:11,920 If I have a mail system and a chat system and a group mechanism for my website, I can have 105 00:07:11,920 --> 00:07:15,920 those in different bundles and say that the mail system depends on the chat system. 106 00:07:15,920 --> 00:07:16,920 Right. 107 00:07:16,920 --> 00:07:19,920 And those calls depend together on certain sort of identity systems. 108 00:07:19,920 --> 00:07:20,920 Right, right. 109 00:07:20,920 --> 00:07:23,920 And they're all just sort of connected to each other via URL. 110 00:07:23,920 --> 00:07:28,920 And then, I mean, I'm thinking that the other exciting thing here is that you can take this 111 00:07:28,920 --> 00:07:32,920 hello bundle that we haven't deployed to any web server because everything's sort of -- to 112 00:07:32,920 --> 00:07:37,920 use an old term, they're relatively defined paths and they're not sort of tied directly 113 00:07:37,920 --> 00:07:38,920 to any particular web server. 114 00:07:38,920 --> 00:07:43,920 So, it's somewhat completely self-contained and you can deploy it anywhere that you want 115 00:07:43,920 --> 00:07:44,920 to. 116 00:07:44,920 --> 00:07:45,920 Yeah. 117 00:07:45,920 --> 00:07:50,920 In this case, you know, we're doing it into any OSGI-based, you know, HTTP service. 118 00:07:50,920 --> 00:07:51,920 Well, sure. 119 00:07:53,920 --> 00:07:54,920 Right. 120 00:07:54,920 --> 00:07:58,920 So, to run this guy, I'll open the dialogue. 121 00:07:58,920 --> 00:08:03,920 Now, I have a launch configuration I've already set up from before. 122 00:08:03,920 --> 00:08:08,920 But really, it's just a -- we've got all the plugins that are in our targets, which is 123 00:08:08,920 --> 00:08:10,920 the standard Eclipse SDK drop. 124 00:08:10,920 --> 00:08:13,920 And I've selected 11 bundles out of there. 125 00:08:13,920 --> 00:08:14,920 And you can look through the list here. 126 00:08:14,920 --> 00:08:18,920 You see there's some, you know, common blogging and some things here. 127 00:08:18,920 --> 00:08:19,920 Yeah. 128 00:08:19,920 --> 00:08:21,920 And then you get it down. 129 00:08:21,920 --> 00:08:25,920 And to the interesting ones, you've got HTTP JETI and HTTP servlets. 130 00:08:25,920 --> 00:08:30,920 So, these are the things that actually supply HTTP functionality. 131 00:08:30,920 --> 00:08:33,920 And at the very bottom, it's alphabetical. 132 00:08:33,920 --> 00:08:35,920 We've got a bundle for JETI. 133 00:08:35,920 --> 00:08:40,920 So, we've taken JETI and bundlized it by putting an OSGI manifest markup in it. 134 00:08:40,920 --> 00:08:41,920 Yeah. 135 00:08:41,920 --> 00:08:44,920 And now it's embedded inside of Equinox. 136 00:08:44,920 --> 00:08:51,920 So, what I'm about to do with this launch configuration is start up -- oh, and I've got to add our -- this 137 00:08:51,920 --> 00:08:53,920 is our bundle we just added, right? 138 00:08:53,920 --> 00:08:54,920 Mm-hmm. 139 00:08:55,920 --> 00:09:01,920 So, what I'm about to do is start up an Equinox that's got JETI embedded in it. 140 00:09:01,920 --> 00:09:08,920 JETI will start and, you know, all the various contributions that we've made to JETI, in our case, just this one, 141 00:09:08,920 --> 00:09:13,920 will get woven into the URL space that I can go to a browser and get them on. 142 00:09:13,920 --> 00:09:14,920 Right, right. 143 00:09:14,920 --> 00:09:21,920 And now, you had a kind of an interesting phrasing there that you're going to start up an Equinox. 144 00:09:21,920 --> 00:09:25,920 And so, does that mean that there's actually an Equinox server that you're starting up? 145 00:09:25,920 --> 00:09:32,920 Or, I mean, what's sort of the relationship between the container of Equinox and JETI? 146 00:09:33,920 --> 00:09:34,920 Right. 147 00:09:34,920 --> 00:09:35,920 So, let me show you that here. 148 00:09:35,920 --> 00:09:37,920 In the console, I'll make the console big. 149 00:09:37,920 --> 00:09:40,920 This is the console for what I just launched. 150 00:09:40,920 --> 00:09:41,920 Right. 151 00:09:41,920 --> 00:09:44,920 Here in the corner, it's an OSGI framework that I launched. 152 00:09:44,920 --> 00:09:46,920 It happens to be called JETI and Equinox. 153 00:09:46,920 --> 00:09:51,920 And this is the standard OSGI console that we get. 154 00:09:51,920 --> 00:09:53,920 And you can see in here the list of bundles. 155 00:09:53,920 --> 00:09:55,920 I've got 11 bundles running. 156 00:09:55,920 --> 00:09:57,920 And there's Mort A, JETI there. 157 00:09:57,920 --> 00:09:58,920 So, there's Mort A, JETI. 158 00:09:58,920 --> 00:09:59,920 Right. 159 00:09:59,920 --> 00:10:02,920 And various other bundles which are active. 160 00:10:02,920 --> 00:10:04,920 And so, it's just up and running. 161 00:10:04,920 --> 00:10:06,920 And I can see here that JETI has started up. 162 00:10:06,920 --> 00:10:08,920 It's listening on port 80. 163 00:10:08,920 --> 00:10:11,920 And various things are sort of going on. 164 00:10:11,920 --> 00:10:18,920 And now, if I find my browser, go over here and go localhost. 165 00:10:18,920 --> 00:10:20,920 I've done this before. 166 00:10:20,920 --> 00:10:21,920 So, it's over there. 167 00:10:21,920 --> 00:10:22,920 Oh, darn. 168 00:10:22,920 --> 00:10:23,920 Oh, yes. 169 00:10:23,920 --> 00:10:24,920 Because I didn't put index. 170 00:10:24,920 --> 00:10:26,920 It's actually the wrong URL. 171 00:10:26,920 --> 00:10:27,920 Sorry. 172 00:10:27,920 --> 00:10:33,920 So, I can just go here and get content slash index dot HTML. 173 00:10:33,920 --> 00:10:35,920 I forgot which one I was doing. 174 00:10:35,920 --> 00:10:38,920 And there's our static content flow world. 175 00:10:38,920 --> 00:10:39,920 Right. 176 00:10:39,920 --> 00:10:41,920 And that was actually pretty quick to just get up and running with things. 177 00:10:41,920 --> 00:10:42,920 Especially since that. 178 00:10:42,920 --> 00:10:43,920 Well, yeah. 179 00:10:43,920 --> 00:10:44,920 That's the thing. 180 00:10:44,920 --> 00:10:46,920 There was nothing, you know, no configuring comcat. 181 00:10:46,920 --> 00:10:47,920 Right. 182 00:10:47,920 --> 00:10:51,920 And long sequence and making a war and all that sort of stuff. 183 00:10:51,920 --> 00:10:53,920 It's basically just, you know, let it go. 184 00:10:53,920 --> 00:10:54,920 Right. 185 00:10:54,920 --> 00:11:04,920 But what's kind of even cooler is that content is literally being served up dynamically right now. 186 00:11:04,920 --> 00:11:05,920 Right. 187 00:11:05,920 --> 00:11:09,920 So, I can change this to a hollow world, I don't know, whatever. 188 00:11:09,920 --> 00:11:10,920 It's nice. 189 00:11:11,920 --> 00:11:12,920 Right. 190 00:11:12,920 --> 00:11:17,920 And then I go back to our web browser and refresh and it's there. 191 00:11:17,920 --> 00:11:18,920 Right. 192 00:11:18,920 --> 00:11:19,920 So, this is something really magic. 193 00:11:19,920 --> 00:11:20,920 Oh, wow. 194 00:11:21,920 --> 00:11:24,920 So, what's going on in the back? 195 00:11:24,920 --> 00:11:28,920 Is it just like you said, it's reading directly from the file system, right? 196 00:11:28,920 --> 00:11:29,920 Right. 197 00:11:29,920 --> 00:11:30,920 That's pretty exciting. 198 00:11:30,920 --> 00:11:31,920 Yeah. 199 00:11:31,920 --> 00:11:32,920 So, what it is is I launched Equinox. 200 00:11:33,920 --> 00:11:34,920 Yeah. 201 00:11:34,920 --> 00:11:37,920 The bundles are coming, some of them out of my workspace and some of them out of what we 202 00:11:37,920 --> 00:11:38,920 call our target box ones. 203 00:11:38,920 --> 00:11:39,920 Right. 204 00:11:39,920 --> 00:11:42,920 And so, the ones that are coming out of my workspace, they're literally just very interested. 205 00:11:42,920 --> 00:11:43,920 Right, right. 206 00:11:43,920 --> 00:11:47,920 So, when I go and I edit them, the content is immediately reflected in whatever… 207 00:11:48,920 --> 00:11:49,920 Right. 208 00:11:49,920 --> 00:11:55,920 And what that shows you is that a bundle can be, you know, a zip file as it were or some 209 00:11:55,920 --> 00:12:00,920 other blob of information or it could just be an expanded out file system based sort 210 00:12:00,920 --> 00:12:01,920 of bundle as it were. 211 00:12:01,920 --> 00:12:02,920 Exactly. 212 00:12:02,920 --> 00:12:04,920 You don't have to worry about packaging things up. 213 00:12:05,920 --> 00:12:06,920 Yeah. 214 00:12:06,920 --> 00:12:11,920 You could take this bundle and export it as a jar and then it would be a bundled jar 215 00:12:11,920 --> 00:12:12,920 and it would work. 216 00:12:12,920 --> 00:12:13,920 It's just exactly the same. 217 00:12:13,920 --> 00:12:14,920 Right. 218 00:12:14,920 --> 00:12:15,920 Right. 219 00:12:15,920 --> 00:12:16,920 So, now we've done some static content. 220 00:12:16,920 --> 00:12:19,920 You know, that was fun but it's not that exciting. 221 00:12:19,920 --> 00:12:21,920 So, let's do some serverlets. 222 00:12:21,920 --> 00:12:28,920 So, you remember we added an extension to the, excuse me, to the resources extension point. 223 00:12:28,920 --> 00:12:38,920 So, let's add another extension, check this guy, to the serverlets extension point. 224 00:12:40,920 --> 00:12:44,920 So, here we've got, it's asking for details for the extension. 225 00:12:44,920 --> 00:12:46,920 Again, we have to give it an alias. 226 00:12:46,920 --> 00:12:48,920 Let's put this one simply at hello. 227 00:12:48,920 --> 00:12:49,920 Mm-hmm. 228 00:12:49,920 --> 00:12:53,920 And we have to define it, you know, serverlets are defined by Java classes. 229 00:12:53,920 --> 00:12:55,920 So, we have to define a class. 230 00:12:55,920 --> 00:12:59,920 But now, there's some interesting things that are going to happen here. 231 00:12:59,920 --> 00:13:03,920 And before we go and do that, we want to look at the dependencies. 232 00:13:03,920 --> 00:13:10,920 So, remember I talked to you before about how bundles are standalone and they describe what they need for the rest of the world and what they give for the rest of the world. 233 00:13:10,920 --> 00:13:11,920 Absolutely. 234 00:13:11,920 --> 00:13:16,920 So, right here, I'm looking into the dependencies page of the bundle, the hello bundle. 235 00:13:16,920 --> 00:13:21,920 And we can see the list of required plugins and the list of imported packets. 236 00:13:21,920 --> 00:13:25,920 These are all the things that I could, the bundle I possibly get from the outside world. 237 00:13:25,920 --> 00:13:27,920 As you can see, they're both empty. 238 00:13:27,920 --> 00:13:28,920 Right. 239 00:13:28,920 --> 00:13:30,920 Right now, we're not thinking we need anything from the outside world. 240 00:13:30,920 --> 00:13:36,920 But we're about to implement a servlet which needs to extend HTTP servlet to class. 241 00:13:36,920 --> 00:13:37,920 Right. 242 00:13:37,920 --> 00:13:40,920 We have to see if we're going to get that from one place. 243 00:13:40,920 --> 00:13:45,920 So, what we can do here is then to go and add import package and do HTTP. 244 00:13:45,920 --> 00:13:50,920 Oh, hang on. 245 00:13:50,920 --> 00:13:52,920 I don't want a servlet. 246 00:13:52,920 --> 00:13:54,920 We need these two packages. 247 00:13:54,920 --> 00:13:55,920 Okay. 248 00:13:55,920 --> 00:13:57,920 So, I'm going to add those. 249 00:13:57,920 --> 00:13:58,920 Save. 250 00:13:58,920 --> 00:14:00,920 And go back to my extension tab here. 251 00:14:00,920 --> 00:14:03,920 And now I'm going to go and define the servlet class. 252 00:14:03,920 --> 00:14:05,920 When I do that, it comes in partially filled out. 253 00:14:05,920 --> 00:14:06,920 Right. 254 00:14:06,920 --> 00:14:13,920 But I'm actually going to make it extend HTTP servlet there. 255 00:14:13,920 --> 00:14:14,920 Okay. 256 00:14:14,920 --> 00:14:16,920 And I'll just click finish. 257 00:14:16,920 --> 00:14:19,920 And now I've got a servlet class, but it's got no body. 258 00:14:19,920 --> 00:14:21,920 So, I'll do get. 259 00:14:21,920 --> 00:14:23,920 And I'll make a quick body here. 260 00:14:23,920 --> 00:14:25,920 What should we do? 261 00:14:25,920 --> 00:14:26,920 We'll just do something like that. 262 00:14:26,920 --> 00:14:26,920 We'll do that. 263 00:14:26,920 --> 00:14:27,920 We'll do that. 264 00:14:27,920 --> 00:14:28,920 Not yet. 265 00:14:28,920 --> 00:14:29,920 Later. 266 00:14:29,920 --> 00:14:30,920 Make that even feel cool. 267 00:14:30,920 --> 00:14:31,920 And do that. 268 00:14:31,920 --> 00:14:32,920 Yeah. 269 00:14:32,920 --> 00:14:33,920 We'll just do a preview. 270 00:14:33,920 --> 00:14:34,920 Um. 271 00:14:34,920 --> 00:14:35,920 Hello from the servlet. 272 00:14:35,920 --> 00:14:36,920 Perfect. 273 00:14:36,920 --> 00:14:37,920 And do that. 274 00:14:37,920 --> 00:14:38,920 We'll just, uh, do a preview. 275 00:14:38,920 --> 00:14:39,920 Um. 276 00:14:39,920 --> 00:14:40,920 Hello from the servlet. 277 00:14:40,920 --> 00:14:41,920 Perfect. 278 00:14:41,920 --> 00:14:42,920 And do that. 279 00:14:42,920 --> 00:14:43,920 Yeah. 280 00:14:43,920 --> 00:14:44,920 We'll just, uh, do a preview. 281 00:14:44,920 --> 00:14:45,920 Um. 282 00:14:45,920 --> 00:14:46,920 Hello from the servlet. 283 00:14:46,920 --> 00:14:47,920 Um. 284 00:14:47,920 --> 00:14:49,920 Hello from the servlet. 285 00:14:49,920 --> 00:14:50,920 Perfect. 286 00:14:50,920 --> 00:14:51,920 And close. 287 00:14:51,920 --> 00:14:52,920 Close that. 288 00:14:52,920 --> 00:15:00,920 So, we register that, you know, you can obviously put any arbitrary content here in your service 289 00:15:00,920 --> 00:15:01,920 if you want. 290 00:15:01,920 --> 00:15:02,920 Right, right. 291 00:15:02,920 --> 00:15:06,920 And I'll obviously link it to web application frameworks and things like that. 292 00:15:06,920 --> 00:15:07,920 Oh, sure. 293 00:15:07,920 --> 00:15:08,920 I mean, you do, Rhett. 294 00:15:08,920 --> 00:15:10,920 You can have a jack on front. 295 00:15:10,920 --> 00:15:11,920 Right, right, right. 296 00:15:11,920 --> 00:15:12,920 Temples for all of those. 297 00:15:12,920 --> 00:15:15,920 But I'm trying to show just the sort of the basics here. 298 00:15:15,920 --> 00:15:16,920 Absolutely. 299 00:15:16,920 --> 00:15:23,920 So, we'll save our, uh, saved everything. 300 00:15:23,920 --> 00:15:27,920 Now, just to step back for a second and make sure that I've done everything I need to 301 00:15:27,920 --> 00:15:28,920 do. 302 00:15:28,920 --> 00:15:29,920 Um. 303 00:15:29,920 --> 00:15:30,920 I believe so. 304 00:15:30,920 --> 00:15:31,920 So, we'll go back. 305 00:15:31,920 --> 00:15:34,920 And now, there's something interesting I'll show you. 306 00:15:34,920 --> 00:15:37,920 Uh, we should still assign the console. 307 00:15:37,920 --> 00:15:39,920 We're still running our server. 308 00:15:39,920 --> 00:15:40,920 Uh-huh. 309 00:15:40,920 --> 00:15:41,920 Right. 310 00:15:41,920 --> 00:15:43,920 And what we did is we went into our bundle. 311 00:15:43,920 --> 00:15:44,920 Right. 312 00:15:44,920 --> 00:15:47,920 And we, we used to have static, just static content in there. 313 00:15:47,920 --> 00:15:48,920 And it's still here in the index.html. 314 00:15:48,920 --> 00:15:50,920 And what we just did is we added a servlet. 315 00:15:50,920 --> 00:15:51,920 Right. 316 00:15:51,920 --> 00:15:54,920 We added that servlet up the, uh, hello URL. 317 00:15:54,920 --> 00:15:58,920 So, if we went to localhost/hello, let's go do that right now. 318 00:15:58,920 --> 00:15:59,920 Ah, yes. 319 00:15:59,920 --> 00:16:01,920 We will see it dynamically deployed, huh? 320 00:16:01,920 --> 00:16:04,920 Well, yes and no. 321 00:16:04,920 --> 00:16:06,920 The localhost flow, I don't see it. 322 00:16:06,920 --> 00:16:07,920 Right? 323 00:16:07,920 --> 00:16:08,920 Right. 324 00:16:08,920 --> 00:16:21,920 But if I go back to our console, here, and find the, our hello bundle is number two. 325 00:16:21,920 --> 00:16:22,920 Right. 326 00:16:22,920 --> 00:16:31,920 So, if I go and I say, update two, and then go back to my lib browser. 327 00:16:31,920 --> 00:16:32,920 Oh, yeah. 328 00:16:32,920 --> 00:16:33,920 That's exciting. 329 00:16:33,920 --> 00:16:34,920 That's exciting. 330 00:16:34,920 --> 00:16:35,920 So, what happens when you update a bundle? 331 00:16:35,920 --> 00:16:38,920 See, what I did is I really just changed the content of the bundle. 332 00:16:38,920 --> 00:16:39,920 Right. 333 00:16:39,920 --> 00:16:40,920 That content got installed previously. 334 00:16:40,920 --> 00:16:41,920 Now, I've changed the content. 335 00:16:41,920 --> 00:16:46,920 And now, I tell, I simply tell the OSGI system, hey, update the content of that. 336 00:16:46,920 --> 00:16:49,920 Because there's new, like update your, your view of, of that bundle. 337 00:16:49,920 --> 00:16:50,920 Because there's new content in it. 338 00:16:50,920 --> 00:16:51,920 Right. 339 00:16:51,920 --> 00:16:52,920 Right. 340 00:16:52,920 --> 00:16:55,920 And so, it dynamically went, found those classes, found those new extensions, 341 00:16:55,920 --> 00:17:01,920 wove them into the system, and made that URL available, um, to, you know, to the browsers. 342 00:17:01,920 --> 00:17:06,920 And, and does, does it, does it reload the entire bundle, or is it more selective in how 343 00:17:06,920 --> 00:17:09,920 it reloads things, or dynamically loads things up? 344 00:17:09,920 --> 00:17:14,920 No, it reloads the bundle, because you could have arbitrary classes already loaded. 345 00:17:14,920 --> 00:17:15,920 Sure. 346 00:17:15,920 --> 00:17:18,920 Like, in this case, we went to static content with no classes into something with classes. 347 00:17:18,920 --> 00:17:22,920 But, if I already had something with classes in it, um, that, you could get quite sticky 348 00:17:22,920 --> 00:17:24,920 into having old versions of classes. 349 00:17:24,920 --> 00:17:25,920 Oh, yeah. 350 00:17:25,920 --> 00:17:26,920 Absolutely. 351 00:17:26,920 --> 00:17:29,920 So, you have to essentially throw away the old class loader. 352 00:17:29,920 --> 00:17:30,920 Right. 353 00:17:30,920 --> 00:17:32,920 And get a new class loader based on the new content. 354 00:17:32,920 --> 00:17:33,920 That makes sense. 355 00:17:33,920 --> 00:17:34,920 But, yeah. 356 00:17:34,920 --> 00:17:39,920 I mean, because I'm running, you know, in a, um, you know, a modern job or VM, we've got 357 00:17:39,920 --> 00:17:40,920 hot code replaced. 358 00:17:40,920 --> 00:17:44,920 We can also do things like, um, I'll add some more text here. 359 00:17:44,920 --> 00:17:45,920 Let's see. 360 00:17:45,920 --> 00:17:46,920 Let's see. 361 00:17:46,920 --> 00:17:47,920 Let's see. 362 00:17:47,920 --> 00:17:48,920 Second version. 363 00:17:48,920 --> 00:17:49,920 We'll change that. 364 00:17:49,920 --> 00:17:50,920 Right. 365 00:17:50,920 --> 00:17:58,920 And because we're running in situ, right, right out of the project, so just to illustrate that, 366 00:17:58,920 --> 00:18:02,920 right, I added the text here, and, and what I'm going to do is I'll go and I'll update 367 00:18:02,920 --> 00:18:03,920 bundle again. 368 00:18:03,920 --> 00:18:04,920 Okay. 369 00:18:04,920 --> 00:18:12,920 So I can just do update two, and then go back to our browser, and refresh, and then we've got 370 00:18:12,920 --> 00:18:13,920 a lot of those users. 371 00:18:13,920 --> 00:18:14,920 Great. 372 00:18:14,920 --> 00:18:15,920 Yeah, that's, that's pretty nice. 373 00:18:15,920 --> 00:18:19,920 That's, I mean, that's always one of the, uh, uh, if you don't have something helping 374 00:18:19,920 --> 00:18:24,920 you out along these lines, one of the, the, uh, annoyances of doing any sort of Java enterprise 375 00:18:24,920 --> 00:18:28,920 or whatever you want to call it development is having to redeploy things and wait. 376 00:18:28,920 --> 00:18:29,920 It's a, it's a big time suck. 377 00:18:29,920 --> 00:18:30,920 It's a big time suck. 378 00:18:30,920 --> 00:18:34,920 So it's always nice to have a system, like runtime systems that are very responsive to 379 00:18:34,920 --> 00:18:36,920 getting new changes in there for the development cycle. 380 00:18:36,920 --> 00:18:37,920 Right. 381 00:18:37,920 --> 00:18:38,920 Right. 382 00:18:38,920 --> 00:18:41,920 And so actually one of your questions on something that's very important. 383 00:18:41,920 --> 00:18:45,920 I mean, this, what we've been running is, is Jetty embedded inside of Econoc. 384 00:18:45,920 --> 00:18:46,920 Right. 385 00:18:46,920 --> 00:18:50,920 And in a classic sort of IT shop, uh, you know, if you went to your IT, you know, your 386 00:18:50,920 --> 00:18:54,920 security guys and said, and said, hey, I want to run this Econoc thing on our production 387 00:18:54,920 --> 00:18:55,920 service. 388 00:18:55,920 --> 00:18:56,920 Right. 389 00:18:56,920 --> 00:18:59,920 They would, they would probably, you know, look at you strangely and, and, you know, quietly 390 00:18:59,920 --> 00:19:00,920 shuffle you out the door. 391 00:19:00,920 --> 00:19:01,920 Right. 392 00:19:01,920 --> 00:19:04,920 Um, but if you went to them and said, hey, I have this web app that I want to run on 393 00:19:04,920 --> 00:19:09,920 our, you know, on our production, uh, or whatever your website would be. 394 00:19:09,920 --> 00:19:10,920 Right. 395 00:19:10,920 --> 00:19:13,920 They would say, you know, they'd ask a few questions, but they'd call, you know, in the 396 00:19:13,920 --> 00:19:15,920 end it would, it would, it would work out well. 397 00:19:15,920 --> 00:19:16,920 Right. 398 00:19:16,920 --> 00:19:22,920 And so what we have is to take exactly these same bundles and run them embedded inside 399 00:19:22,920 --> 00:19:24,920 of another web app. 400 00:19:24,920 --> 00:19:26,920 It's a thing we call the serverlet bridge. 401 00:19:26,920 --> 00:19:31,920 And essentially what happens is you, you have this, this tiny war, uh, that we create 402 00:19:31,920 --> 00:19:35,920 and it's, it's just got OSGI and a little launcher stuff in it. 403 00:19:35,920 --> 00:19:40,920 And you, you would deploy that war using standard, you know, J2E tools and all that sort of stuff. 404 00:19:40,920 --> 00:19:42,920 You put it in as a regular web app. 405 00:19:42,920 --> 00:19:47,920 And what it does when it starts up, it registers the serverlet with the, in the web app. 406 00:19:47,920 --> 00:19:52,920 And when somebody hits that serverlet, essentially it goes and it will start an Equinox framework 407 00:19:52,920 --> 00:19:54,920 inside of the web app. 408 00:19:54,920 --> 00:19:55,920 Right. 409 00:19:55,920 --> 00:20:01,920 And once Equinox is running, you can add bundles to it and do all that sort of stuff. 410 00:20:01,920 --> 00:20:02,920 Right. 411 00:20:02,920 --> 00:20:13,920 It's, it's, it's, it's, it's, it's, it's, it's, it's, it's, it's a little tiny HTTP server server, server, uh, service story in there that forwards the request that came into the web app and forwards them and on to the bundles that are registered. 412 00:20:13,920 --> 00:20:21,920 So I can take exactly this bundle, the hello bundle and package it up, either put it in the war or leave it outside the war and have the war discover it. 413 00:20:21,920 --> 00:20:27,920 Um, and, and, and deploy into Tomcat or WAZ or, or, or in fact, Yeti running as a standalone, you know, for them. 414 00:20:27,920 --> 00:20:28,920 Right. 415 00:20:28,920 --> 00:20:29,920 Right. 416 00:20:29,920 --> 00:20:30,920 Or BA servers. 417 00:20:30,920 --> 00:20:39,920 And again, going back to the discussion about programming models, it gives you that notion that you can run the same content on all, like I could run this on a cell phone. 418 00:20:39,920 --> 00:20:40,920 Right. 419 00:20:40,920 --> 00:20:45,920 So that their next version of, uh, cell phones are going to be OSGI enabled. 420 00:20:45,920 --> 00:20:46,920 Right. 421 00:20:46,920 --> 00:20:54,920 So you can run this bundle on your cell phone, run it on your desktop, run it on your server, you know, all sorts of different things are now possible. 422 00:20:54,920 --> 00:21:12,920 So that, that's, that's really kind of the, the overview of, of, of, you know, flip to the server as an example of really the modularity story that's emerging around OSGI and, and Quinox, um, and Java indeed, um, as the underlying technology. 423 00:21:12,920 --> 00:21:13,920 Yeah, that, that looks nice. 424 00:21:13,920 --> 00:21:14,920 It's very powerful. 425 00:21:15,920 --> 00:21:17,920 Well, that's fantastic. 426 00:21:17,920 --> 00:21:18,920 Yeah. 427 00:21:18,920 --> 00:21:20,920 Well, thanks for, uh, showing us all those features. 428 00:21:20,920 --> 00:21:22,920 That was, uh, that was quite helpful. 429 00:21:22,920 --> 00:21:23,920 That'll be fun. 430 00:21:23,920 --> 00:21:24,920 I enjoy it. 431 00:21:24,920 --> 00:21:26,920 There's, uh, there's, there's, there's many more. 432 00:21:26,920 --> 00:21:37,920 I've just sort of scratched the surface of, uh, Equinox as a, as a, as a solid, you know, runtime base for lots of different kinds of applications, whether they're web-based or embedded or desktop or tools. 433 00:21:37,920 --> 00:21:38,920 Right. 434 00:21:38,920 --> 00:21:41,920 There's a lot more under there, but, uh, you know, we have to look at that. 435 00:21:41,920 --> 00:21:42,920 That's right. 436 00:21:42,920 --> 00:21:52,920 And it seems like with Europa that, uh, there'll be much, uh, there'll be a lot more depth on the server side of using OSGI or, or, you know, Equinox using the OSGI model of development 437 00:21:52,920 --> 00:21:55,920 instead of just, uh, doing it on the desktop as it were. 438 00:21:55,920 --> 00:21:56,920 So that'll be fun. 439 00:21:56,920 --> 00:21:57,920 Yeah. 440 00:21:57,920 --> 00:21:58,920 I've seen a lot more. 441 00:21:58,920 --> 00:21:59,920 Yeah. 442 00:21:59,920 --> 00:22:00,920 That'll be fun to see pan out. 443 00:22:00,920 --> 00:22:01,920 Hmm. 444 00:22:01,920 --> 00:22:02,920 All right. 445 00:22:02,920 --> 00:22:03,920 Well, uh, thanks. 446 00:22:03,920 --> 00:22:04,920 Thank you. 447 00:22:04,920 --> 00:22:05,920 Thank you.