add simple example for LDP service

README.md

@@ -10,6 +10,7 @@ A simple beginner project for eniLINK web applications.
 * run `mvn test -Pconfigure -DskipTests` to initialize or update a launch configuration
 * run `mvn test` to (re-)start the eniLINK platform
 * The application should now be available at: [http://localhost:8080/beginner/](http://localhost:8080/beginner/)
+* The LDP service (with default configuration) should be available at:  [http://localhost:8080/ldp/](http://localhost:8080/ldp/)
 
 ## Developing
 * The project can be developed with any IDE supporting Java and Scala projects

net.enilink.beginner.web/pom.xml

@@ -30,6 +30,11 @@
 			<version>${enilink.version}</version>
 			<type>pom</type>
 		</dependency>
+		<dependency>
+			<groupId>net.enilink.platform</groupId>
+			<artifactId>net.enilink.platform.ldp</artifactId>
+			<version>${enilink.version}</version>
+		</dependency>
 	</dependencies>
 
 	<build>

net.enilink.beginner.web/src/main/scala/net/enilink/beginner/web/LDPServiceExample.scala

@@ -0,0 +1,48 @@
+package net.enilink.beginner.web
+
+import net.enilink.komma.core.{Statement, URI, URIs}
+import net.enilink.platform.ldp.{LDP, LDPHelper}
+import net.enilink.platform.lift.util.Globals
+import net.enilink.vocab.rdf.RDF
+import net.enilink.vocab.rdfs.RDFS
+import net.liftweb.common.Full
+
+import scala.jdk.CollectionConverters._
+
+object LDPServiceExample extends LDPHelper {
+// // use Handler to configure LDP service
+//  val handler = new BasicContainerHandler("ldp")
+//  val rootUri = URIs.createURI(s"""http://localhost:8080/${ handler.getPath }/""")
+
+  // use default configuration
+  val rootUri = URIs.createURI("http://localhost:8080/ldp/")
+  // initialize the root container
+  init(rootUri)
+
+  // register LDP endpoint for resources
+  register("ldp", rootUri, null)
+
+  protected def init(uri: URI) = Globals.contextModelSet.vend.map { ms =>
+    ms.getUnitOfWork.begin
+    try {
+      // create the resource model if it does not yet exist
+      val m = ms.createModel(uri)
+      m.setLoaded(true)
+      m.getManager.add(List(
+        new Statement(uri, RDF.PROPERTY_TYPE, LDP.TYPE_RESOURCE),
+        //new Statement(uri, RDF.PROPERTY_TYPE, LDP.TYPE_RDFSOURCE),
+        //new Statement(uri, RDF.PROPERTY_TYPE, LDP.TYPE_CONTAINER),
+        new Statement(uri, RDF.PROPERTY_TYPE, LDP.TYPE_BASICCONTAINER),
+        new Statement(uri, RDFS.PROPERTY_LABEL, "LDP Basic container"),
+        new Statement(uri, RDFS.PROPERTY_COMMENT, "root container for various RDF and none-RDF resources including containers ")).asJava)
+
+      // side effect for rdfa templates: set Globals.contextModel
+      Globals.contextModel.default.set(() => Full(m))
+    } catch {
+      case t: Throwable => t.printStackTrace
+    } finally {
+      ms.getUnitOfWork.end
+    }
+  }
+
+}

net.enilink.beginner.web/src/main/scala/net/enilink/beginner/web/LiftModule.scala

@@ -3,15 +3,13 @@ package net.enilink.beginner.web
 
 
 import scala.language.implicitConversions
-
 import net.enilink.komma.core.URIs
 import net.enilink.platform.lift.sitemap.HideIfInactive
 import net.enilink.platform.lift.sitemap.Menus
 import net.enilink.platform.lift.sitemap.Menus._
 import net.enilink.platform.lift.util.Globals
 import net.liftweb.common.Full
-import net.liftweb.http.Req
-import net.liftweb.http.S
+import net.liftweb.http.{LiftRules, RedirectResponse, Req, S}
 import net.liftweb.sitemap.SiteMap
 
 /**
@@ -54,8 +52,23 @@ class LiftModule {
     Globals.contextModelRules.prepend {
       case Req(`app` :: _, _, _) if !S.param("model").isDefined => Full(DEFAULT_MODEL_URI)
     }
+    // add DOM LDP service
+    LiftRules.dispatch.append(LDPServiceExample)
   }
 
+//  def boot {
+//    // redirect to index
+//    LiftRules.statelessDispatch.prepend {
+//      case Req(`app` :: Nil, _, _) => {
+//        () => Full(RedirectResponse(s"/$app/"))
+//      }
+//    }
+//
+//    // add DOM LDP service
+//    LiftRules.dispatch.append(LDPServiceExample)
+//  }
+
+
   def shutdown {
   }
 }