Fixed unintialized ARQ context

Author: Miel Vander Sande

pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.linkeddatafragments</groupId>
     <artifactId>ldfserver</artifactId>
-    <version>0.2.1</version>
+    <version>0.2.2</version>
     <packaging>war</packaging>
     <name>Linked Data Fragments Server</name>
     <url>http://linkeddatafragments.org</url>
@@ -20,7 +20,7 @@
     <scm>
         <connection>https://github.com/LinkedDataFragments/Server.Java.git</connection>
         <developerConnection>https://github.com/LinkedDataFragments/Server.Java.git</developerConnection>
-        <tag>v0.2.1</tag>
+        <tag>v0.2.2</tag>
         <url>https://github.com/LinkedDataFragments/Server.Java</url>
     </scm>
     <developers>
@@ -54,7 +54,7 @@
         </contributor>
     </contributors>
     <properties>
-        <jettyVersion>9.3.6.v20151106</jettyVersion>
+        <jettyVersion>9.4.9.v20180320</jettyVersion>
     </properties>
     <dependencies>
         <dependency>
@@ -125,6 +125,16 @@
             <artifactId>freemarker</artifactId>
             <version>2.3.25-incubating</version>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>1.7.21</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>1.7.10</version>
+        </dependency>
     </dependencies>
     <build>
         <plugins>

src/main/java/org/linkeddatafragments/servlet/LinkedDataFragmentServlet.java

@@ -182,9 +182,7 @@ public void doGet(HttpServletRequest request, HttpServletResponse response) thro
 
                 fragment = dataSource.getRequestProcessor()
                                   .createRequestedFragment( ldfRequest );
-                System.out.println("here");
                 writer.writeFragment(response.getOutputStream(), dataSource, fragment, ldfRequest);
-                System.out.println("not here");
 
             } catch (DataSourceNotFoundException ex) {
                 try {

src/main/java/org/linkeddatafragments/views/RdfWriterImpl.java

@@ -5,6 +5,8 @@
 import java.util.Map;
 import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletRequest;
+
+import org.apache.jena.query.ARQ;
 import org.apache.jena.rdf.model.Model;
 import org.apache.jena.rdf.model.ModelFactory;
 import org.apache.jena.riot.Lang;
@@ -26,6 +28,7 @@ class RdfWriterImpl extends LinkedDataFragmentWriterBase implements ILinkedDataF
     public RdfWriterImpl(Map<String, String> prefixes, HashMap<String, IDataSource> datasources, String mimeType) {
         super(prefixes, datasources);
         this.contentType = RDFLanguages.contentTypeToLang(mimeType);
+        ARQ.init();
     }
 
     @Override
@@ -47,7 +50,6 @@ public void writeFragment(ServletOutputStream outputStream, IDataSource datasour
         output.add(fragment.getMetadata());
         output.add(fragment.getTriples());
         output.add(fragment.getControls());
-
         RDFDataMgr.write(outputStream, output, contentType);
     }