Système permettant de retourner des résultats divers après l'exécution d'un ProtocolReader sans cast (générique)

app/src/main/java/lightcontainer/App.java

@@ -6,8 +6,11 @@ package lightcontainer;
 import lightcontainer.domains.server.MulticastServerListener;
 import lightcontainer.domains.server.UnicastServerListener;
 import lightcontainer.interfaces.MulticastSPR;
+import lightcontainer.interfaces.ProtocolRepository;
+import lightcontainer.protocol.rules.reader.HelloRule;
 import lightcontainer.repository.ClientHandlerRepository;
 import lightcontainer.repository.FileFrontEnd;
+import lightcontainer.repository.ProtocolRepositoryImpl;
 import lightcontainer.repository.StoreProcessorRepository;
 
 public class App {
@@ -22,9 +25,12 @@ public class App {
         // Create all repository
         ClientHandlerRepository clientRep = new ClientHandlerRepository();
         StoreProcessorRepository storeRep = new StoreProcessorRepository();
+        ProtocolRepository protocolRep = new ProtocolRepositoryImpl();
+
+        protocolRep.addReader(new HelloRule());
 
         new UnicastServerListener(clientRep, UNICAST_PORT);
-        new MulticastServerListener(storeRep, MULTICAST_IP, MULTICAST_PORT);
+        new MulticastServerListener(storeRep, protocolRep, MULTICAST_IP, MULTICAST_PORT);
 
         FileFrontEnd ffe = new FileFrontEnd(clientRep, storeRep);
 

app/src/main/java/lightcontainer/domains/server/MulticastServerListener.java

@@ -2,34 +2,38 @@ package lightcontainer.domains.server;
 
 import lightcontainer.domains.client.StoreProcessor;
 import lightcontainer.interfaces.MulticastSPR;
+import lightcontainer.interfaces.ProtocolRepository;
+import lightcontainer.protocol.ProtocolReader;
+import lightcontainer.protocol.rules.reader.HelloRule;
 
 import java.io.IOException;
 import java.net.*;
 
 /**
  * StoreMulticastRunnable
- *
+ * <p>
  * Class listening to the announcement of new StoreBackEnd.
  * Allowing it to be used as a storage unit.
  *
- * @version     1.0
- * @since       1.0
- *
- * @see         Runnable
  * @author Jérémi NIHART <j.nihart@student.helmo.be>
+ * @version 1.0
+ * @see Runnable
+ * @since 1.0
  */
 public class MulticastServerListener implements Runnable {
     // Variable
     private final String multicast_address;
     private final int multicast_port;
     private final MulticastSPR repository;
+    private final ProtocolRepository protocolRep;
 
     private final byte[] buffer = new byte[256];
     private MulticastSocket listener;
 
     // Constructor
-    public MulticastServerListener(MulticastSPR repository, String multicast_address, int multicast_port) {
+    public MulticastServerListener(MulticastSPR repository, ProtocolRepository protocolRep, String multicast_address, int multicast_port) {
         this.repository = repository;
+        this.protocolRep = protocolRep;
         this.multicast_address = multicast_address;
         this.multicast_port = multicast_port;
         repository.setServerListener(this);
@@ -38,10 +42,9 @@ public class MulticastServerListener implements Runnable {
     /**
      * Start Multicast listening on indicated port and IP group.
      *
-     * @since       1.0
-     *
      * @see MulticastSocket#receive(DatagramPacket)
      * @see DatagramPacket
+     * @since 1.0
      */
     @Override
     public void run() {
@@ -54,29 +57,32 @@ public class MulticastServerListener implements Runnable {
             DatagramPacket packet = new DatagramPacket(this.buffer, this.buffer.length);
             // Add the listener to the multicast group
             this.listener.joinGroup(listener_group);
-            while(true) {
+            while (true) {
                 // Read the packet received and build a string of characters
                 this.listener.receive(packet);
                 String data = new String(packet.getData(), 0, packet.getLength());
                 // Create a new StoreBacked (try used in the case of an error to maintain the listening loop)
                 try {
                     // TODO Récupérer le port du message du packet et le setup (add description of the line).
-                    Socket socket = new Socket(packet.getAddress(), 2500);
+                    HelloRule.Result readerResult = protocolRep.executeReader(data);
+
+                    Socket socket = new Socket(packet.getAddress(), readerResult.getPort());
                     // Create the store processor
                     StoreProcessor storeProcessor = new StoreProcessor(socket, null); // TODO <!!!> : Voir comment on procède get via repo ou ici ?!
                     // Add the store processor to its repository
                     this.repository.addStore(storeProcessor);
-                } catch (IOException ignore) { }
+                } catch (IOException ignore) {
+                }
+            }
+        } catch (Exception ignore) {
         }
-        } catch (Exception ignore) { }
     }
 
     /**
      * Closes the MulticastSocket connection and aborts the listening and infinite listening loop.
      *
-     * @since       1.0
-     *
      * @see MulticastServerListener#run()
+     * @since 1.0
      */
     public void stop() {
         this.listener.close();

app/src/main/java/lightcontainer/interfaces/ProtocolRepository.java

@@ -5,7 +5,7 @@ import lightcontainer.protocol.ProtocolWriter;
 
 public interface ProtocolRepository {
 
-    boolean executeReader(String data);
+    <T extends ProtocolReader.ProtocolResult> T executeReader(String data);
 
     String executeWriter(String... datas);
 

app/src/main/java/lightcontainer/protocol/ProtocolReader.java

@@ -11,11 +11,14 @@ public abstract class ProtocolReader {
         this.rulePattern = Pattern.compile(pattern);
     }
 
+
+    public abstract class ProtocolResult {}
+
     /**
      * Permet de lancer la décomposition d'une commande pour en extraire les données
      * @param data Contenu de la commande
      */
-    public boolean execute(String data) {
+    public <T extends ProtocolResult> T execute(String data) {
         Matcher ruleMatcher = this.rulePattern.matcher(data);
 
         if (ruleMatcher.matches()) {
@@ -24,17 +27,17 @@ public abstract class ProtocolReader {
             for (int i = 1; i <= groups.length; ++i)
                 groups[i - 1] = ruleMatcher.group(i);
 
-            onExecuted(groups);
+
-            return true;
+            return onExecuted(groups);
         }
 
-        return false;
+        return null;
     }
 
     /**
      * Cette méthode est appelée lors de l'exécution de la règle
      * @param data
      */
-    protected abstract void onExecuted(String... data);
+    protected abstract <T> T onExecuted(String... data);
 
 }

app/src/main/java/lightcontainer/protocol/rules/reader/HelloRule.java

@@ -2,6 +2,9 @@ package lightcontainer.protocol.rules.reader;
 
 import lightcontainer.protocol.ProtocolReader;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class HelloRule extends ProtocolReader {
 
     private static final  String PATTERN = "^HELLO ([A-Za-z0-9]{5,20}) ([0-9]{1,5})\r\n$";
@@ -17,11 +20,33 @@ public class HelloRule extends ProtocolReader {
     }
 
 
-    @Override
+    public class Result extends ProtocolResult {
-    protected void onExecuted(String... data) {
-        String domain = data[DOMAIN], port = data[PORT];
 
-        System.out.printf("Règle Hello avec domain=%s et port=%s\n", domain, port);
+        private final String domain;
+        private final int port;
+
+        public Result(String domain, int port) {
+            this.domain = domain;
+            this.port = port;
+        }
+
+        public String getDomain() {
+            return domain;
+        }
+
+        public int getPort() {
+            return port;
+        }
+    }
+
+
+    @Override
+    protected HelloRule.Result onExecuted(String... data) {
+        String domain = data[DOMAIN];
+        int port = Integer.parseInt(data[PORT]);
+
+        System.out.printf("Regle Hello avec domain=%s et port=%s\n", domain, port);
+        return new HelloRule.Result(domain, port);
     }
 
 }

app/src/main/java/lightcontainer/repository/ProtocolRepositoryImpl.java

@@ -8,17 +8,18 @@ import java.util.HashSet;
 import java.util.Set;
 
 public class ProtocolRepositoryImpl implements ProtocolRepository {
-    private Set<ProtocolReader> readers = new HashSet<>();
+    private final Set<ProtocolReader> readers = new HashSet<>();
-    private Set<ProtocolWriter> writers = new HashSet<>();
+    private final Set<ProtocolWriter> writers = new HashSet<>();
 
     @Override
-    public boolean executeReader(String data) {
+    public <T extends ProtocolReader.ProtocolResult> T executeReader(String data) {
         for (ProtocolReader reader : readers) {
-            if (reader.execute(data)) {
+            T readerResult = reader.execute(data);
-                return true;
+            if (readerResult != null) {
+                return readerResult;
             }
         }
-        return false;
+        return null;
     }
 
     @Override

app/src/test/java/lightcontainer/protocol/rules/reader/HelloRuleTest.java

@@ -14,8 +14,12 @@ class HelloRuleTest {
         ProtocolReader protocolReader = new HelloRule();
         String request = "HELLO bento 42890\r\n";
 
-        // EXPECT
+        // WHEN
-        assertTrue(protocolReader.execute(request));
+        HelloRule.Result ruleResult = protocolReader.execute(request);
+
+        // THEN
+        assertEquals("bento", ruleResult.getDomain());
+        assertEquals(42890, ruleResult.getPort());
     }
 
 }