Last active
December 24, 2015 04:58
-
-
Save theotherian/6746967 to your computer and use it in GitHub Desktop.
A way to map Handlebars helper functions on the server side within a Jersey resource
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| A way to map Handlebars helper functions on the server side within a Jersey resource |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import java.io.IOException; | |
| import java.util.concurrent.ExecutionException; | |
| import javax.ws.rs.GET; | |
| import javax.ws.rs.Path; | |
| import javax.ws.rs.Produces; | |
| import javax.ws.rs.core.MediaType; | |
| import javax.ws.rs.core.Response; | |
| import com.github.jknack.handlebars.Template; | |
| @Path("desktop") | |
| public class DesktopView { | |
| @GET | |
| @Produces(MediaType.TEXT_HTML) | |
| public Response get() throws IOException, InterruptedException, ExecutionException { | |
| Template template = HandlebarsManager.get().compile("home"); | |
| return Response.ok(template.apply(new Args("Ian", "Denny", "Chris"))).build(); | |
| } | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import javax.ws.rs.Path; | |
| import javax.ws.rs.container.DynamicFeature; | |
| import javax.ws.rs.container.ResourceInfo; | |
| import javax.ws.rs.core.FeatureContext; | |
| import org.apache.log4j.Logger; | |
| import com.github.jknack.handlebars.Handlebars; | |
| import com.github.jknack.handlebars.Helper; | |
| public class HandlebarsResourceFeature implements DynamicFeature { | |
| private final Logger logger = Logger.getLogger(getClass()); | |
| @Override | |
| public void configure(ResourceInfo resourceInfo, FeatureContext context) { | |
| if (Helper.class.isAssignableFrom(resourceInfo.getResourceClass())) { | |
| Class<?> resourceClass = resourceInfo.getResourceClass(); | |
| String helperName = resourceClass.getAnnotation(Path.class).value(); | |
| // HandlebarsManager exists in the project linked at the end of this post. | |
| Handlebars handlebars = HandlebarsManager.get(); | |
| if (handlebars.helper(helperName) == null) { | |
| Helper<?> helper = null; | |
| try { | |
| helper = resourceInfo.getResourceClass().asSubclass(Helper.class).newInstance(); | |
| } catch (InstantiationException | IllegalAccessException e) { | |
| logger.fatal("Can't instantiate " + resourceClass.getCanonicalName(), e); | |
| } | |
| if (helper != null) { | |
| handlebars.registerHelper(helperName, helper); | |
| } | |
| else { | |
| logger.info("Not registering " + helperName + " a second time; already registered previously"); | |
| } | |
| } | |
| } | |
| } | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <head> | |
| <title>Home Page</title> | |
| </head> | |
| <body> | |
| <h1>Welcome to the site!</h1> | |
| <p>Here are the latest messages:</p> | |
| {{#each names}} | |
| <ul> | |
| <li> | |
| <h2>Messages from {{this}}</h2> | |
| {{#latestmessages this}} | |
| {{> messages this}} | |
| {{/latestmessages}} | |
| </li> | |
| </ul> | |
| {{/each}} | |
| </body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <head> | |
| <title>Mobile Home Page</title> | |
| <script src="/handlebars.js"></script> | |
| <script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.3/jquery.min.js"></script> | |
| <script type="text/javascript"> | |
| {{#precompile "messages"}}{{/precompile}} | |
| </script> | |
| </head> | |
| <body> | |
| <h1>Welcome to the mobile site!</h1> | |
| <h4>Click on a name to see messages</h4> | |
| {{#each names}} | |
| <div class="message-container-{{this}}"> | |
| <p><a class="message-link" id="{{this}}" href="#">{{this}}</a></p> | |
| </div> | |
| {{/each}} | |
| <script type="text/javascript"> | |
| $(document).ready(function bindAll() { | |
| $('.message-link').bind('click', event, function showMessages() { | |
| var name = event.target.id; | |
| var messageList = '#message-list-' + name; | |
| if ($(messageList).length) { | |
| if ($(messageList).is(':visible')) { | |
| return; | |
| } | |
| else { | |
| $('.message-list').hide(); | |
| $(messageList).show(); | |
| return; | |
| } | |
| } | |
| else { | |
| $('.message-list').hide(); | |
| } | |
| // here's the important bit involving calling the resource | |
| var messageTemplate = Handlebars.templates['messages']; | |
| $.get('latestmessages/' + name).done( function(data) { | |
| var html = messageTemplate(data); | |
| $('.message-container-' + name).append('<div id="message-list-' + name + '" class="message-list">'); | |
| $(messageList).append(html); | |
| }); | |
| }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import java.io.IOException; | |
| import java.util.List; | |
| import javax.ws.rs.GET; | |
| import javax.ws.rs.Path; | |
| import javax.ws.rs.PathParam; | |
| import javax.ws.rs.Produces; | |
| import javax.ws.rs.core.MediaType; | |
| import com.github.jknack.handlebars.Helper; | |
| import com.github.jknack.handlebars.Options; | |
| @Path("latestmessages") | |
| public class MessageResource implements Helper<String> { | |
| @GET | |
| @Path("{name}") | |
| @Produces(MediaType.APPLICATION_JSON) | |
| public List<Message> get(@PathParam("name") String name) { | |
| return getMessages(name); | |
| } | |
| private List<Message> getMessages(String name) { | |
| // MessageDatastore exists in the project linked at the end of this post | |
| return MessageDatastore.getMessagesByName(name); | |
| } | |
| @Override | |
| public CharSequence apply(String context, Options options) throws IOException { | |
| return options.fn(getMessages(context)); | |
| } | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <ul> | |
| {{#each this}} | |
| <li>{{text}} <span style="font-size: x-small;">{{when}}</span></li> | |
| {{/each}} | |
| </ul> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment