Added files for a simple Restlet/Jackson example

Author: Alexander Tarnowski

java/restlet/build.gradle

@@ -0,0 +1,11 @@
+apply plugin: 'java'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies { 
+    compile files(fileTree(dir: 'lib', includes: ['*.jar'])) 
+	compile group: 'org.codehaus.jackson', name: 'jackson-core-lgpl', version: '1.9.11'
+    compile group: 'org.codehaus.jackson', name: 'jackson-mapper-lgpl', version: '1.9.11'
+} 

java/restlet/lib/org.restlet.ext.jackson.jar

@@ -0,0 +1,16 @@
+package se.tarnowski.bootstrap.restlet;
+
+import org.restlet.Component;
+import org.restlet.data.Protocol;
+import se.tarnowski.bootstrap.restlet.resource.JsonResource;
+import se.tarnowski.bootstrap.restlet.resource.TextResource;
+
+public class Main {
+    public static void main(String[] args) throws Exception {
+        Component component = new Component();
+        component.getServers().add(Protocol.HTTP, 8182);
+        component.getDefaultHost().attach("/text", TextResource.class);
+        component.getDefaultHost().attach("/json", JsonResource.class);
+        component.start();
+    }
+}

java/restlet/lib/org.restlet.jar

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+package se.tarnowski.bootstrap.restlet.representation;
+
+public class SimpleResponse {
+    public String response;
+
+    public SimpleResponse() {
+        this("Default response");
+    }
+
+    public SimpleResponse(String response) {
+        this.response = response;
+    }
+}

java/restlet/src/main/java/se/tarnowski/bootstrap/restlet/Main.java

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+package se.tarnowski.bootstrap.restlet.request;
+
+public class SimpleRequest {
+    public String parameter;
+}

java/restlet/src/main/java/se/tarnowski/bootstrap/restlet/representation/SimpleResponse.java

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+package se.tarnowski.bootstrap.restlet.resource;
+
+import org.codehaus.jackson.map.ObjectMapper;
+import org.restlet.ext.jackson.JacksonRepresentation;
+import org.restlet.representation.Representation;
+import org.restlet.resource.Get;
+import org.restlet.resource.Post;
+import org.restlet.resource.ServerResource;
+import se.tarnowski.bootstrap.restlet.representation.SimpleResponse;
+import se.tarnowski.bootstrap.restlet.request.SimpleRequest;
+
+public class JsonResource extends ServerResource {
+
+    private static ObjectMapper objectMapper = new ObjectMapper();
+
+    @Get("json")
+    public Representation produceResponse() {
+        return new JacksonRepresentation<SimpleResponse>(new SimpleResponse());
+    }
+
+    // Gotcha: the Representation argument is crucial. Otherwise HTTP error code 415 will be returned.
+    @Post("json")
+    public Representation echoString(Representation representation) {
+        try {
+            SimpleRequest request = objectMapper.readValue(representation.getStream(), SimpleRequest.class);
+            return new JacksonRepresentation<SimpleResponse>(new SimpleResponse(request.parameter));
+        } catch (Exception e) {
+            throw new IllegalStateException(e);
+        }
+     }
+}

java/restlet/src/main/java/se/tarnowski/bootstrap/restlet/request/SimpleRequest.java

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+package se.tarnowski.bootstrap.restlet.resource;
+
+import org.restlet.resource.Get;
+import org.restlet.resource.ServerResource;
+
+public class TextResource extends ServerResource {
+
+   @Get
+   public String produceResponse() {
+      return "A text response";
+   }
+}

java/restlet/src/main/java/se/tarnowski/bootstrap/restlet/resource/JsonResource.java

@@ -0,0 +1,3 @@
+{
+    "parameter":"value from request"
+}