replicas

1 files changed, 115 insertions, 0 deletions

diff --git a/src/main/java/derms/ReplicaManager.java b/src/main/java/derms/ReplicaManager.java
new file mode 100644
index 0000000..9725bcb
--- /dev/null
+++ b/src/main/java/derms/ReplicaManager.java
@@ -0,0 +1,115 @@
+package derms;
+import derms.frontend.FEInterface;
+
+import derms.Replica1;
+import derms.Replica2;
+import derms.Replica3;
+import derms.Replica4;
+
+import derms.Request;
+import derms.Response;
+import derms.net.MessagePayload;
+import derms.net.tomulticast.TotalOrderMulticastReceiver;
+import derms.net.runicast.ReliableUnicastSender;
+import derms.net.tomulticast.TotalOrderMulticastSender;
+
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.util.logging.Logger;
+
+public class ReplicaManager {
+    private final int replicaId;
+    private Replica replica;
+    private Response response;
+    private final FEInterface frontEnd;
+    private final Logger log;
+    private ReliableUnicastSender <Response>unicastSender;
+
+    private TotalOrderMulticastReceiver multicastReceiver;
+
+    public ReplicaManager(int replicaId, FEInterface frontEnd) throws IOException {
+        this.replicaId = replicaId;
+        this.frontEnd = frontEnd;
+        this.log = Logger.getLogger(getClass().getName());
+        initReplica();
+        initMulticastReceiver();
+        startHeartbeatThread();
+    }
+
+    private void initReplica() throws IOException {
+        InetSocketAddress frontEndAddress = new InetSocketAddress("localhost", 1999);
+        switch (replicaId)
+        case 1:
+        replica = new Replica1(frontEndAddress);
+        break;
+        case 2:
+        replica = new Replica2( frontEndAddress);
+        break;
+        case 3:
+        replica = new Replica3( frontEndAddress);
+        break;
+        case 4:
+        replica = new Replica4(frontEndAddress);
+        break;
+        replica.startProcess();
+    }
+
+
+
+    private void initMulticastReceiver() throws IOException {
+        InetSocketAddress group = new InetSocketAddress("230.0.0.0", 4446); // Example multicast group and port for receiving requests
+        InetAddress localAddress = InetAddress.getLocalHost(); // Your local address
+        multicastReceiver = new TotalOrderMulticastReceiver<Request>(group, localAddress);
+
+
+        new Thread(() -> {
+            while (true) {
+                try {
+                    MessagePayload receivedPayload = multicastReceiver.receive();
+                    Request request = (Request) receivedPayload;
+                    replica.processRequest(request);
+                } catch (InterruptedException e) {
+                    log.severe("Failed to receive request: " + e.getMessage());
+                    Thread.currentThread().interrupt();
+                } catch (Exception e) {
+                    log.severe("Error processing request: " + e.getMessage());
+                }
+            }
+        }).start();
+    }
+
+
+    private void startHeartbeatThread() {
+        new Thread(() -> {
+            while (true) {
+                if (!replica.isAlive()) {
+                    frontEnd.informRmIsDown(replica.getId());
+                    replica.restart();
+                }
+                try {
+                    Thread.sleep(5000); // Example 5 seconds.
+                } catch (InterruptedException e) {
+                    log.severe("Heartbeat thread interrupted: " + e.getMessage());
+                }
+            }
+        }).start();
+    }
+
+    public void sendResponseToFE(Response response) {
+        try {
+            unicastSender.send(response);
+        } catch (IOException e) {
+            log.severe("Failed to send response to FE: " + e.getMessage());
+        }
+    }
+    public void handleByzantineFailure() {
+        log.severe("Byzantine failure detected in Replica " + replica.getId());
+        replica.restart();
+        frontEnd.informRmHasBug(replica.getId());
+    }
+
+
+
+}
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