summaryrefslogtreecommitdiff
path: root/src/main/java
diff options
context:
space:
mode:
authorPaul Buetow <paul@buetow.org>2025-06-22 16:45:17 +0300
committerPaul Buetow <paul@buetow.org>2025-06-22 16:45:17 +0300
commit4c16cc3c4da7bbf8375d7951185db1761eb396bf (patch)
tree19199b664ce802ed3e967e318e6d4ffeb8c9bf39 /src/main/java
parent464df52901e2dcb84eb81a22f2db19cbf17e5a9f (diff)
Remove all Raft protocol code
Removed all Raft-related code as it was not working properly: - Removed VSRaftProtocol.java implementation - Removed all Raft test files - Removed Raft example/demo files - Removed Raft documentation - Removed Raft simulation files (.dat) - Removed Raft scripts - Updated VSRegisteredEvents to remove Raft registration - Updated SimulationBuilder to remove RAFT constant - Updated SimulationFactory to remove Raft methods - Updated SimulationBuilderTest to remove Raft tests - Updated pom.xml to remove Raft test configurations The protocol had issues with leader election not completing in GUI mode. šŸ¤– Generated with Claude Code https://claude.ai/code Co-Authored-By: Claude <noreply@anthropic.com>
Diffstat (limited to 'src/main/java')
-rw-r--r--src/main/java/events/VSRegisteredEvents.java1
-rw-r--r--src/main/java/examples/CreateAndVerifyRaftSimulation.java142
-rw-r--r--src/main/java/examples/CreateMinimalRaftSimulation.java86
-rw-r--r--src/main/java/examples/CreateSimpleRaftSimulation.java123
-rw-r--r--src/main/java/examples/CreateWorkingRaftSimulation.java152
-rw-r--r--src/main/java/examples/RaftSimulationBuilder.java76
-rw-r--r--src/main/java/examples/TestRaftLoading.java57
-rw-r--r--src/main/java/protocols/implementations/VSRaftProtocol.java603
-rw-r--r--src/main/java/simulator/builder/SimulationBuilder.java1
-rw-r--r--src/main/java/simulator/builder/SimulationFactory.java32
10 files changed, 0 insertions, 1273 deletions
diff --git a/src/main/java/events/VSRegisteredEvents.java b/src/main/java/events/VSRegisteredEvents.java
index 91000bc..92deeb0 100644
--- a/src/main/java/events/VSRegisteredEvents.java
+++ b/src/main/java/events/VSRegisteredEvents.java
@@ -99,7 +99,6 @@ public final class VSRegisteredEvents {
registerEvent("protocols.implementations.VSReliableMulticastProtocol");
registerEvent("protocols.implementations.VSTwoPhaseCommitProtocol");
registerEvent("protocols.implementations.VSTimestampDemoProtocol");
- registerEvent("protocols.implementations.VSRaftProtocol");
/* Make dummy objects of each protocol, to see if they contain VSPrefs
values to edit */
diff --git a/src/main/java/examples/CreateAndVerifyRaftSimulation.java b/src/main/java/examples/CreateAndVerifyRaftSimulation.java
deleted file mode 100644
index 126c37c..0000000
--- a/src/main/java/examples/CreateAndVerifyRaftSimulation.java
+++ /dev/null
@@ -1,142 +0,0 @@
-package examples;
-
-import simulator.*;
-import core.*;
-import prefs.*;
-import events.*;
-import events.internal.*;
-import events.implementations.*;
-import serialize.VSSerialize;
-import java.io.*;
-
-/**
- * Creates a Raft simulation and verifies it can be loaded properly.
- */
-public class CreateAndVerifyRaftSimulation {
-
- private static final String RAFT_PROTOCOL = "protocols.implementations.VSRaftProtocol";
-
- public static void main(String[] args) throws Exception {
- System.out.println("=== Creating and Verifying Raft Simulation ===\n");
-
- // Initialize
- VSDefaultPrefs prefs = new VSDefaultPrefs();
- prefs.fillWithDefaults();
- VSRegisteredEvents.init(prefs);
-
- // Step 1: Create the simulation
- System.out.println("Step 1: Creating Raft simulation...");
-
- VSSimulatorFrame frame = new VSSimulatorFrame(prefs, null);
- VSSimulator simulator = new VSSimulator(prefs, frame);
- frame.addSimulator(simulator);
-
- // Access visualization
- java.lang.reflect.Field vizField = VSSimulator.class.getDeclaredField("simulatorVisualization");
- vizField.setAccessible(true);
- VSSimulatorVisualization viz = (VSSimulatorVisualization) vizField.get(simulator);
-
- // Add processes (5 total: 3 servers + 2 clients)
- while (viz.getNumProcesses() < 5) {
- java.lang.reflect.Method addProcessMethod = VSSimulatorVisualization.class.getDeclaredMethod("addProcess");
- addProcessMethod.setAccessible(true);
- addProcessMethod.invoke(viz);
- }
-
- VSTaskManager taskManager = viz.getTaskManager();
-
- // Add Raft server activations
- System.out.println(" - Adding 3 Raft servers");
- for (int i = 0; i < 3; i++) {
- VSProtocolEvent serverEvent = new VSProtocolEvent();
- serverEvent.setProtocolClassname(RAFT_PROTOCOL);
- serverEvent.isClientProtocol(false);
- serverEvent.isProtocolActivation(true);
-
- VSTask task = new VSTask(0, viz.getProcess(i), serverEvent, false);
- taskManager.addTask(task);
- }
-
- // Add Raft client activations
- System.out.println(" - Adding 2 Raft clients");
- for (int i = 3; i < 5; i++) {
- VSProtocolEvent clientEvent = new VSProtocolEvent();
- clientEvent.setProtocolClassname(RAFT_PROTOCOL);
- clientEvent.isClientProtocol(true);
- clientEvent.isProtocolActivation(true);
-
- // Stagger client starts
- VSTask task = new VSTask(200 + (i-3)*100, viz.getProcess(i), clientEvent, false);
- taskManager.addTask(task);
- }
-
- // Add some events
- System.out.println(" - Adding crash/recovery events");
-
- // Server 0 crashes at 1000, recovers at 1500
- VSProcessCrashEvent crash = new VSProcessCrashEvent();
- taskManager.addTask(new VSTask(1000, viz.getProcess(0), crash, false));
-
- VSProcessRecoverEvent recover = new VSProcessRecoverEvent();
- taskManager.addTask(new VSTask(1500, viz.getProcess(0), recover, false));
-
- // Save simulation
- File outputFile = new File("saved-simulations/raft-verified.dat");
- outputFile.getParentFile().mkdirs();
-
- VSSerialize serialize = new VSSerialize();
- serialize.saveSimulator(outputFile.getAbsolutePath(), simulator);
-
- frame.dispose();
-
- System.out.println(" āœ“ Simulation saved to: " + outputFile.getName());
-
- // Step 2: Verify the simulation can be loaded
- System.out.println("\nStep 2: Loading and verifying simulation...");
-
- VSSimulatorFrame frame2 = new VSSimulatorFrame(prefs, null);
- VSSimulator loadedSim = serialize.openSimulator(outputFile.getAbsolutePath(), frame2);
-
- if (loadedSim == null) {
- System.err.println(" āœ— Failed to load simulation!");
- System.exit(1);
- }
-
- // Verify contents
- vizField = VSSimulator.class.getDeclaredField("simulatorVisualization");
- vizField.setAccessible(true);
- VSSimulatorVisualization loadedViz = (VSSimulatorVisualization) vizField.get(loadedSim);
-
- System.out.println(" āœ“ Simulation loaded successfully");
- System.out.println(" - Processes: " + loadedViz.getNumProcesses());
-
- // Check tasks
- VSTaskManager loadedTaskManager = loadedViz.getTaskManager();
- java.lang.reflect.Field tasksField = VSTaskManager.class.getDeclaredField("tasks");
- tasksField.setAccessible(true);
- Object taskQueue = tasksField.get(loadedTaskManager);
- java.lang.reflect.Method sizeMethod = taskQueue.getClass().getMethod("size");
- int taskCount = (Integer) sizeMethod.invoke(taskQueue);
-
- System.out.println(" - Scheduled tasks: " + taskCount);
-
- frame2.dispose();
-
- // Step 3: Provide instructions
- System.out.println("\n=== Success! ===");
- System.out.println("\nTo run the Raft simulation:");
- System.out.println("1. Start the simulator:");
- System.out.println(" java -jar target/ds-sim-1.0.1-SNAPSHOT.jar");
- System.out.println("\n2. Load the simulation:");
- System.out.println(" File → Open → saved-simulations/raft-verified.dat");
- System.out.println("\n3. Run the simulation:");
- System.out.println(" Click the 'Run' button (ā–¶)");
- System.out.println("\n4. What to look for:");
- System.out.println(" - Leader election messages (REQUEST_VOTE, VOTE_RESPONSE)");
- System.out.println(" - Heartbeats from leader (APPEND_ENTRIES)");
- System.out.println(" - Client requests and responses");
- System.out.println(" - Re-election when server 0 crashes at time 1000");
-
- System.exit(0);
- }
-} \ No newline at end of file
diff --git a/src/main/java/examples/CreateMinimalRaftSimulation.java b/src/main/java/examples/CreateMinimalRaftSimulation.java
deleted file mode 100644
index 62db468..0000000
--- a/src/main/java/examples/CreateMinimalRaftSimulation.java
+++ /dev/null
@@ -1,86 +0,0 @@
-package examples;
-
-import simulator.*;
-import core.*;
-import prefs.*;
-import events.*;
-import events.internal.*;
-import serialize.VSSerialize;
-import java.io.*;
-import java.lang.reflect.*;
-
-/**
- * Creates a minimal Raft simulation with just protocol activations.
- * This tests if the basic simulation saving/loading works.
- */
-public class CreateMinimalRaftSimulation {
-
- public static void main(String[] args) throws Exception {
- System.out.println("=== Creating Minimal Raft Simulation ===\n");
-
- // Initialize
- VSDefaultPrefs prefs = new VSDefaultPrefs();
- prefs.fillWithDefaults();
- VSRegisteredEvents.init(prefs);
-
- // Create simulator without GUI
- VSSimulatorFrame frame = new VSSimulatorFrame(prefs, null);
- VSSimulator simulator = new VSSimulator(prefs, frame);
- frame.addSimulator(simulator);
-
- // Access visualization via reflection
- Field vizField = VSSimulator.class.getDeclaredField("simulatorVisualization");
- vizField.setAccessible(true);
- VSSimulatorVisualization viz = (VSSimulatorVisualization) vizField.get(simulator);
-
- // Add 3 processes
- Method addProcessMethod = VSSimulatorVisualization.class.getDeclaredMethod("addProcess");
- addProcessMethod.setAccessible(true);
- for (int i = 0; i < 3; i++) {
- addProcessMethod.invoke(viz);
- }
-
- VSTaskManager taskManager = viz.getTaskManager();
-
- // Create only one Raft server activation at time 0
- System.out.println("Adding single Raft server activation on process 0...");
- VSProtocolEvent serverEvent = new VSProtocolEvent();
- serverEvent.setProtocolClassname("protocols.implementations.VSRaftProtocol");
- serverEvent.isClientProtocol(false);
- serverEvent.isProtocolActivation(true);
-
- VSTask task = new VSTask(0, viz.getProcess(0), serverEvent, false);
- taskManager.addTask(task);
-
- // Save simulation
- File outputFile = new File("saved-simulations/raft-minimal.dat");
- outputFile.getParentFile().mkdirs();
-
- VSSerialize serialize = new VSSerialize();
- serialize.saveSimulator(outputFile.getAbsolutePath(), simulator);
-
- frame.dispose();
-
- System.out.println("\nSimulation saved to: " + outputFile.getAbsolutePath());
- System.out.println("\nTo test:");
- System.out.println("1. Run: java -jar target/ds-sim-1.0.1-SNAPSHOT.jar");
- System.out.println("2. File → Open → saved-simulations/raft-minimal.dat");
- System.out.println("3. Click Run button and check the logs");
-
- // Try to immediately load it back to verify
- System.out.println("\nVerifying saved file can be loaded...");
- try {
- VSSimulatorFrame frame2 = new VSSimulatorFrame(prefs, null);
- VSSimulator loaded = serialize.openSimulator(outputFile.getAbsolutePath(), frame2);
- if (loaded != null) {
- System.out.println("āœ“ File loaded successfully!");
- frame2.dispose();
- } else {
- System.out.println("āœ— Failed to load file!");
- }
- } catch (Exception e) {
- System.out.println("āœ— Error loading file: " + e.getMessage());
- e.printStackTrace();
- }
- }
-} \ No newline at end of file
diff --git a/src/main/java/examples/CreateSimpleRaftSimulation.java b/src/main/java/examples/CreateSimpleRaftSimulation.java
deleted file mode 100644
index ebff53e..0000000
--- a/src/main/java/examples/CreateSimpleRaftSimulation.java
+++ /dev/null
@@ -1,123 +0,0 @@
-package examples;
-
-import simulator.*;
-import core.*;
-import prefs.*;
-import events.*;
-import events.internal.*;
-import events.implementations.*;
-import serialize.VSSerialize;
-import java.io.*;
-
-/**
- * Creates a simple working Raft simulation.
- * The key insight: Raft protocol uses HAS_ON_SERVER_START, so when servers
- * are activated via VSProtocolEvent, the protocol's onServerStart() method
- * will be called automatically.
- */
-public class CreateSimpleRaftSimulation {
-
- private static final String RAFT_PROTOCOL = "protocols.implementations.VSRaftProtocol";
-
- public static void main(String[] args) throws Exception {
- // Initialize
- VSDefaultPrefs prefs = new VSDefaultPrefs();
- prefs.fillWithDefaults();
- VSRegisteredEvents.init(prefs);
-
- // Create frame and simulator
- VSSimulatorFrame frame = new VSSimulatorFrame(prefs, null);
- VSSimulator simulator = new VSSimulator(prefs, frame);
- frame.addSimulator(simulator);
-
- // Access visualization via reflection
- java.lang.reflect.Field vizField = VSSimulator.class.getDeclaredField("simulatorVisualization");
- vizField.setAccessible(true);
- VSSimulatorVisualization viz = (VSSimulatorVisualization) vizField.get(simulator);
-
- // Add more processes - we want 5 total (3 servers, 2 clients)
- while (viz.getNumProcesses() < 5) {
- java.lang.reflect.Method addProcessMethod = VSSimulatorVisualization.class.getDeclaredMethod("addProcess");
- addProcessMethod.setAccessible(true);
- addProcessMethod.invoke(viz);
- }
-
- VSTaskManager taskManager = viz.getTaskManager();
-
- // Activate Raft SERVERS on processes 0, 1, 2
- // Since Raft uses HAS_ON_SERVER_START, onServerStart() will be called automatically!
- System.out.println("Creating Raft server activations...");
- for (int i = 0; i < 3; i++) {
- VSProtocolEvent serverEvent = new VSProtocolEvent();
- serverEvent.setProtocolClassname(RAFT_PROTOCOL);
- serverEvent.isClientProtocol(false); // Server mode
- serverEvent.isProtocolActivation(true); // Activation
-
- // Activate at time 0
- VSTask task = new VSTask(0, viz.getProcess(i), serverEvent, false);
- taskManager.addTask(task);
- System.out.println(" - Server " + i + " will activate at time 0");
- }
-
- // Activate Raft CLIENTS on processes 3, 4
- // Clients will react to server heartbeats and start sending requests
- System.out.println("\nCreating Raft client activations...");
- for (int i = 3; i < 5; i++) {
- VSProtocolEvent clientEvent = new VSProtocolEvent();
- clientEvent.setProtocolClassname(RAFT_PROTOCOL);
- clientEvent.isClientProtocol(true); // Client mode
- clientEvent.isProtocolActivation(true); // Activation
-
- // Activate clients a bit later so servers have time to elect leader
- VSTask task = new VSTask(300 + (i-3)*100, viz.getProcess(i), clientEvent, false);
- taskManager.addTask(task);
- System.out.println(" - Client " + (i-3) + " will activate at time " + (300 + (i-3)*100));
- }
-
- // Add crash/recovery to demonstrate leader re-election
- System.out.println("\nAdding failure scenarios...");
-
- // Crash server 0 at time 1000
- VSProcessCrashEvent crash = new VSProcessCrashEvent();
- VSTask crashTask = new VSTask(1000, viz.getProcess(0), crash, false);
- taskManager.addTask(crashTask);
- System.out.println(" - Server 0 will crash at time 1000");
-
- // Recover server 0 at time 1500
- VSProcessRecoverEvent recover = new VSProcessRecoverEvent();
- VSTask recoverTask = new VSTask(1500, viz.getProcess(0), recover, false);
- taskManager.addTask(recoverTask);
- System.out.println(" - Server 0 will recover at time 1500");
-
- // Save simulation
- File outputFile = new File("saved-simulations/raft-simple.dat");
- outputFile.getParentFile().mkdirs();
-
- VSSerialize serialize = new VSSerialize();
- serialize.saveSimulator(outputFile.getAbsolutePath(), simulator);
-
- frame.dispose();
-
- System.out.println("\n===========================================");
- System.out.println("Simple Raft simulation saved successfully!");
- System.out.println("===========================================");
- System.out.println("\nFile: " + outputFile.getAbsolutePath());
- System.out.println("\nWhat happens in this simulation:");
- System.out.println("1. Time 0: Three Raft servers start and begin leader election");
- System.out.println("2. Time ~150-300: One server becomes leader (watch for election messages)");
- System.out.println("3. Time 300: First client activates and starts sending requests");
- System.out.println("4. Time 400: Second client activates and starts sending requests");
- System.out.println("5. Time 1000: Server 0 crashes, triggering new leader election");
- System.out.println("6. Time 1500: Server 0 recovers and rejoins as follower");
- System.out.println("\nTo run the simulation:");
- System.out.println("1. java -jar target/ds-sim-1.0.1-SNAPSHOT.jar");
- System.out.println("2. File -> Open -> saved-simulations/raft-simple.dat");
- System.out.println("3. Click 'Run' and watch the Raft consensus in action!");
- System.out.println("\nLook for:");
- System.out.println("- REQUEST_VOTE and VOTE_RESPONSE messages during elections");
- System.out.println("- APPEND_ENTRIES messages (heartbeats) from leader");
- System.out.println("- CLIENT_REQUEST messages and their processing");
-
- System.exit(0);
- }
-} \ No newline at end of file
diff --git a/src/main/java/examples/CreateWorkingRaftSimulation.java b/src/main/java/examples/CreateWorkingRaftSimulation.java
deleted file mode 100644
index 0bc5df4..0000000
--- a/src/main/java/examples/CreateWorkingRaftSimulation.java
+++ /dev/null
@@ -1,152 +0,0 @@
-package examples;
-
-import simulator.*;
-import core.*;
-import prefs.*;
-import events.*;
-import events.internal.*;
-import events.implementations.*;
-import serialize.VSSerialize;
-import java.io.*;
-import java.lang.reflect.*;
-
-/**
- * Creates a working Raft simulation by properly setting up the event queue
- * and ensuring protocols are activated through the normal event system.
- */
-public class CreateWorkingRaftSimulation {
-
- private static final String RAFT_PROTOCOL = "protocols.implementations.VSRaftProtocol";
-
- public static void main(String[] args) throws Exception {
- System.out.println("=== Creating Working Raft Simulation ===\n");
-
- // Initialize
- VSDefaultPrefs prefs = new VSDefaultPrefs();
- prefs.fillWithDefaults();
- VSRegisteredEvents.init(prefs);
-
- // Create simulator with frame
- VSSimulatorFrame frame = new VSSimulatorFrame(prefs, null);
- VSSimulator simulator = new VSSimulator(prefs, frame);
- frame.addSimulator(simulator);
-
- // Access visualization
- Field vizField = VSSimulator.class.getDeclaredField("simulatorVisualization");
- vizField.setAccessible(true);
- VSSimulatorVisualization viz = (VSSimulatorVisualization) vizField.get(simulator);
-
- // Add 5 processes (3 servers + 2 clients)
- Method addProcessMethod = VSSimulatorVisualization.class.getDeclaredMethod("addProcess");
- addProcessMethod.setAccessible(true);
- System.out.println("Adding 5 processes...");
- for (int i = 0; i < 5; i++) {
- addProcessMethod.invoke(viz);
- }
-
- VSTaskManager taskManager = viz.getTaskManager();
-
- // Schedule Raft server activations at time 0
- System.out.println("\nScheduling Raft server activations:");
- for (int i = 0; i < 3; i++) {
- VSProtocolEvent serverEvent = new VSProtocolEvent();
- serverEvent.setProtocolClassname(RAFT_PROTOCOL);
- serverEvent.isClientProtocol(false); // Server mode
- serverEvent.isProtocolActivation(true); // This is an activation
-
- VSTask task = new VSTask(0, viz.getProcess(i), serverEvent, false);
- taskManager.addTask(task);
- System.out.println(" - Server " + i + " activation scheduled at time 0");
- }
-
- // Schedule Raft client activations with slight delay
- System.out.println("\nScheduling Raft client activations:");
- for (int i = 3; i < 5; i++) {
- VSProtocolEvent clientEvent = new VSProtocolEvent();
- clientEvent.setProtocolClassname(RAFT_PROTOCOL);
- clientEvent.isClientProtocol(true); // Client mode
- clientEvent.isProtocolActivation(true); // This is an activation
-
- // Start clients after servers have initialized
- long startTime = 500 + (i - 3) * 200;
- VSTask task = new VSTask(startTime, viz.getProcess(i), clientEvent, false);
- taskManager.addTask(task);
- System.out.println(" - Client " + (i-3) + " activation scheduled at time " + startTime);
- }
-
- // Add some interesting events
- System.out.println("\nAdding crash/recovery events:");
-
- // Process 0 crashes at time 2000 and recovers at 3000
- VSProcessCrashEvent crash1 = new VSProcessCrashEvent();
- taskManager.addTask(new VSTask(2000, viz.getProcess(0), crash1, false));
- System.out.println(" - Server 0 crash scheduled at time 2000");
-
- VSProcessRecoverEvent recover1 = new VSProcessRecoverEvent();
- taskManager.addTask(new VSTask(3000, viz.getProcess(0), recover1, false));
- System.out.println(" - Server 0 recovery scheduled at time 3000");
-
- // Process 1 crashes at time 4000 and recovers at 5000
- VSProcessCrashEvent crash2 = new VSProcessCrashEvent();
- taskManager.addTask(new VSTask(4000, viz.getProcess(1), crash2, false));
- System.out.println(" - Server 1 crash scheduled at time 4000");
-
- VSProcessRecoverEvent recover2 = new VSProcessRecoverEvent();
- taskManager.addTask(new VSTask(5000, viz.getProcess(1), recover2, false));
- System.out.println(" - Server 1 recovery scheduled at time 5000");
-
- // Save simulation
- File outputFile = new File("saved-simulations/raft-working.dat");
- outputFile.getParentFile().mkdirs();
-
- System.out.println("\nSaving simulation...");
- VSSerialize serialize = new VSSerialize();
- serialize.saveSimulator(outputFile.getAbsolutePath(), simulator);
-
- frame.dispose();
-
- System.out.println("\nāœ“ Simulation saved to: " + outputFile.getAbsolutePath());
-
- // Create instruction file
- File instructionFile = new File("saved-simulations/README-raft.txt");
- try (PrintWriter writer = new PrintWriter(instructionFile)) {
- writer.println("RAFT CONSENSUS SIMULATION");
- writer.println("========================");
- writer.println();
- writer.println("This directory contains Raft consensus protocol simulations:");
- writer.println();
- writer.println("1. raft-working.dat - Full working simulation with:");
- writer.println(" - 3 Raft servers (processes 0-2)");
- writer.println(" - 2 Raft clients (processes 3-4)");
- writer.println(" - Server crash/recovery events");
- writer.println();
- writer.println("To run the simulation:");
- writer.println("1. java -jar target/ds-sim-1.0.1-SNAPSHOT.jar");
- writer.println("2. File → Open → saved-simulations/raft-working.dat");
- writer.println("3. Click Run (ā–¶) button");
- writer.println();
- writer.println("What to look for:");
- writer.println("- Leader election (REQUEST_VOTE messages)");
- writer.println("- Heartbeats from leader (APPEND_ENTRIES)");
- writer.println("- Client requests and responses");
- writer.println("- Re-election when servers crash");
- writer.println();
- writer.println("Timeline:");
- writer.println("- Time 0: Servers start, begin leader election");
- writer.println("- Time 500-700: Clients start");
- writer.println("- Time 2000: Server 0 crashes");
- writer.println("- Time 3000: Server 0 recovers");
- writer.println("- Time 4000: Server 1 crashes");
- writer.println("- Time 5000: Server 1 recovers");
- }
-
- System.out.println("āœ“ Instructions saved to: " + instructionFile.getAbsolutePath());
-
- System.out.println("\n=== Success! ===");
- System.out.println("\nThe Raft simulation has been created with the following setup:");
- System.out.println("- 3 servers implementing Raft consensus");
- System.out.println("- 2 clients that will send requests");
- System.out.println("- Crash/recovery events to test fault tolerance");
- System.out.println("\nRun the simulator and load the file to see it in action!");
- }
-} \ No newline at end of file
diff --git a/src/main/java/examples/RaftSimulationBuilder.java b/src/main/java/examples/RaftSimulationBuilder.java
deleted file mode 100644
index c802448..0000000
--- a/src/main/java/examples/RaftSimulationBuilder.java
+++ /dev/null
@@ -1,76 +0,0 @@
-package examples;
-
-import simulator.*;
-import core.*;
-import prefs.*;
-import events.*;
-import events.internal.*;
-import serialize.VSSerialize;
-import java.io.*;
-
-/**
- * Builder for creating Raft simulations programmatically.
- * Uses reflection to access private simulator fields when necessary.
- */
-public class RaftSimulationBuilder {
-
- private static final String RAFT_PROTOCOL = "protocols.implementations.VSRaftProtocol";
-
- public static void main(String[] args) throws Exception {
- // Initialize
- VSDefaultPrefs prefs = new VSDefaultPrefs();
- prefs.fillWithDefaults();
- VSRegisteredEvents.init(prefs);
-
- // Create frame and simulator
- VSSimulatorFrame frame = new VSSimulatorFrame(prefs, null);
- VSSimulator simulator = new VSSimulator(prefs, frame);
- frame.addSimulator(simulator);
-
- // Access private field via reflection
- java.lang.reflect.Field vizField = VSSimulator.class.getDeclaredField("simulatorVisualization");
- vizField.setAccessible(true);
- VSSimulatorVisualization viz = (VSSimulatorVisualization) vizField.get(simulator);
-
- // Build Raft simulation
- VSTaskManager taskManager = viz.getTaskManager();
-
- // Add server activations (processes 0,1)
- for (int i = 0; i < 2; i++) {
- VSProtocolEvent serverEvent = new VSProtocolEvent();
- serverEvent.setProtocolClassname(RAFT_PROTOCOL);
- serverEvent.isClientProtocol(false);
- serverEvent.isProtocolActivation(true);
-
- VSTask task = new VSTask(0, viz.getProcess(i), serverEvent, false);
- taskManager.addTask(task);
- }
-
- // Add client activation (process 2)
- VSProtocolEvent clientEvent = new VSProtocolEvent();
- clientEvent.setProtocolClassname(RAFT_PROTOCOL);
- clientEvent.isClientProtocol(true);
- clientEvent.isProtocolActivation(true);
-
- VSTask clientTask = new VSTask(100, viz.getProcess(2), clientEvent, false);
- taskManager.addTask(clientTask);
-
- // Save
- File outputFile = new File("saved-simulations/raft-consensus.dat");
- outputFile.getParentFile().mkdirs();
-
- VSSerialize serialize = new VSSerialize();
- serialize.saveSimulator(outputFile.getAbsolutePath(), simulator);
-
- frame.dispose();
-
- System.out.println("Raft simulation created: " + outputFile.getAbsolutePath());
- System.out.println("\nContains:");
- System.out.println("- 2 Raft servers (processes 0-1)");
- System.out.println("- 1 Raft client (process 2)");
- System.out.println("\nRun with: java -jar target/ds-sim-1.0.1-SNAPSHOT.jar");
- System.out.println("Then open: " + outputFile.getName());
-
- System.exit(0);
- }
-} \ No newline at end of file
diff --git a/src/main/java/examples/TestRaftLoading.java b/src/main/java/examples/TestRaftLoading.java
deleted file mode 100644
index ebad379..0000000
--- a/src/main/java/examples/TestRaftLoading.java
+++ /dev/null
@@ -1,57 +0,0 @@
-package examples;
-
-import events.VSRegisteredEvents;
-import prefs.VSDefaultPrefs;
-import java.util.Vector;
-
-/**
- * Test if Raft protocol is properly registered and loadable
- */
-public class TestRaftLoading {
- public static void main(String[] args) {
- // Initialize
- VSDefaultPrefs prefs = new VSDefaultPrefs();
- prefs.fillWithDefaults();
- VSRegisteredEvents.init(prefs);
-
- // List all registered protocols
- System.out.println("=== Registered Protocols ===");
- Vector<String> protocolNames = VSRegisteredEvents.getProtocolNames();
- for (String name : protocolNames) {
- String className = VSRegisteredEvents.getClassnameByEventname(name);
- System.out.println(name + " -> " + className);
- }
-
- System.out.println("\n=== Protocol Classnames ===");
- Vector<String> protocolClassnames = VSRegisteredEvents.getProtocolClassnames();
- for (String className : protocolClassnames) {
- String shortName = VSRegisteredEvents.getShortnameByClassname(className);
- System.out.println(className + " (short: " + shortName + ")");
- }
-
- // Check Raft specifically
- System.out.println("\n=== Raft Protocol Check ===");
- String raftClass = "protocols.implementations.VSRaftProtocol";
- String raftShortName = VSRegisteredEvents.getShortnameByClassname(raftClass);
- String raftEventName = VSRegisteredEvents.getNameByClassname(raftClass);
-
- System.out.println("Class: " + raftClass);
- System.out.println("Short name: " + raftShortName);
- System.out.println("Event name: " + raftEventName);
-
- // Try to load the class
- try {
- Class<?> clazz = Class.forName(raftClass);
- System.out.println("Class loaded successfully: " + clazz.getName());
-
- // Check if it's a protocol
- if (protocols.VSAbstractProtocol.class.isAssignableFrom(clazz)) {
- System.out.println("āœ“ Is a valid protocol class");
- } else {
- System.out.println("āœ— NOT a protocol class!");
- }
- } catch (ClassNotFoundException e) {
- System.out.println("āœ— Class not found: " + e.getMessage());
- }
- }
-} \ No newline at end of file
diff --git a/src/main/java/protocols/implementations/VSRaftProtocol.java b/src/main/java/protocols/implementations/VSRaftProtocol.java
deleted file mode 100644
index af12064..0000000
--- a/src/main/java/protocols/implementations/VSRaftProtocol.java
+++ /dev/null
@@ -1,603 +0,0 @@
-package protocols.implementations;
-
-import java.util.*;
-import java.util.concurrent.ConcurrentHashMap;
-
-import core.VSMessage;
-import core.VSInternalProcess;
-import protocols.VSAbstractProtocol;
-
-/**
- * Implementation of the Raft consensus algorithm.
- *
- * Raft is a consensus algorithm designed to be understandable. It ensures that
- * a distributed system agrees on values even in the presence of failures.
- *
- * <p>The protocol has three states:</p>
- * <ul>
- * <li>Follower - Passive state, responds to leaders</li>
- * <li>Candidate - Actively requesting votes to become leader</li>
- * <li>Leader - Manages the cluster and log replication</li>
- * </ul>
- *
- * <p>Key features implemented:</p>
- * <ul>
- * <li>Leader election with randomized timeouts</li>
- * <li>Log replication for state machine commands</li>
- * <li>Safety through term numbers and log matching</li>
- * <li>Membership changes (simplified)</li>
- * </ul>
- *
- * @author Paul C. Buetow
- */
-public class VSRaftProtocol extends VSAbstractProtocol {
-
- // Raft states
- private enum State {
- FOLLOWER,
- CANDIDATE,
- LEADER
- }
-
- // Message types
- private static final String MSG_REQUEST_VOTE = "REQUEST_VOTE";
- private static final String MSG_VOTE_RESPONSE = "VOTE_RESPONSE";
- private static final String MSG_APPEND_ENTRIES = "APPEND_ENTRIES";
- private static final String MSG_APPEND_RESPONSE = "APPEND_RESPONSE";
- private static final String MSG_CLIENT_REQUEST = "CLIENT_REQUEST";
-
- // Timing constants (in simulation time units)
- private static final long HEARTBEAT_INTERVAL = 50;
- private static final long ELECTION_TIMEOUT_MIN = 150;
- private static final long ELECTION_TIMEOUT_MAX = 300;
-
- // Server state (persistent - should be saved to stable storage)
- private State currentState;
- private int currentTerm;
- private Integer votedFor;
- private List<LogEntry> log;
-
- // Server state (volatile)
- private int commitIndex;
- private int lastApplied;
-
- // Leader state (reinitialized after election)
- private Map<Integer, Integer> nextIndex;
- private Map<Integer, Integer> matchIndex;
-
- // Candidate state
- private Set<Integer> votesReceived;
- private long electionTimeout;
-
- // General state
- private Integer currentLeader;
- private long lastHeartbeat;
-
- // Client state
- private boolean clientHasScheduled = false;
- private int clientRequestCount = 0;
-
- /**
- * Log entry structure
- */
- private static class LogEntry {
- final int term;
- final String command;
- final long timestamp;
-
- LogEntry(int term, String command, long timestamp) {
- this.term = term;
- this.command = command;
- this.timestamp = timestamp;
- }
-
- @Override
- public String toString() {
- return String.format("LogEntry{term=%d, cmd='%s', time=%d}",
- term, command, timestamp);
- }
- }
-
- public VSRaftProtocol() {
- super(VSAbstractProtocol.HAS_ON_SERVER_START);
- setClassname(getClass().toString());
- }
-
- @Override
- public void onServerInit() {
- currentState = State.FOLLOWER;
- currentTerm = 0;
- votedFor = null;
- log = new ArrayList<>();
- commitIndex = 0;
- lastApplied = 0;
- nextIndex = new ConcurrentHashMap<>();
- matchIndex = new ConcurrentHashMap<>();
- votesReceived = new HashSet<>();
- currentLeader = null;
-
- // Add a dummy entry at index 0 for easier indexing
- log.add(new LogEntry(0, "INIT", 0));
- }
-
- @Override
- public void onServerStart() {
- // Initialize election timeout and start
- resetElectionTimeout();
- raftLog("Raft node initialized as FOLLOWER, election timeout=" + electionTimeout);
- scheduleElectionTimeout();
- raftLog("Scheduled election timeout check");
- }
-
- @Override
- public void onServerReset() {
- onServerInit();
- removeSchedules();
- }
-
- @Override
- public void onServerRecv(VSMessage message) {
- String msgType = message.getString("type");
- int term = message.getInteger("term");
- int senderId = message.getSendingProcess().getProcessNum();
-
- // Check if this message is intended for us (for unicast messages)
- if (message.objectExists("receiverNum")) {
- int receiverNum = message.getInteger("receiverNum");
- if (receiverNum != process.getProcessNum()) {
- // Message not for us, ignore it
- return;
- }
- }
-
- // If we receive a message with a higher term, become follower
- if (term > currentTerm) {
- currentTerm = term;
- votedFor = null;
- if (currentState != State.FOLLOWER) {
- becomeFollower();
- }
- }
-
- switch (msgType) {
- case MSG_REQUEST_VOTE:
- handleRequestVote(message, senderId);
- break;
- case MSG_VOTE_RESPONSE:
- handleVoteResponse(message, senderId);
- break;
- case MSG_APPEND_ENTRIES:
- handleAppendEntries(message, senderId);
- break;
- case MSG_APPEND_RESPONSE:
- handleAppendResponse(message, senderId);
- break;
- case MSG_CLIENT_REQUEST:
- handleClientRequest(message, senderId);
- break;
- }
- }
-
- @Override
- public void onServerSchedule() {
- long currentTime = process.getTime();
-
- raftLog("onServerSchedule called at time " + currentTime + ", state=" + currentState + ", electionTimeout=" + electionTimeout);
-
- switch (currentState) {
- case FOLLOWER:
- case CANDIDATE:
- // Check election timeout
- if (currentTime >= electionTimeout) {
- startElection();
- } else {
- // Reschedule to check again
- scheduleAt(electionTimeout);
- }
- break;
- case LEADER:
- // Send heartbeats
- sendHeartbeats();
- scheduleAt(currentTime + HEARTBEAT_INTERVAL);
- break;
- }
- }
-
- @Override
- public void onClientInit() {
- // Initialize client state
- clientHasScheduled = false;
- clientRequestCount = 0;
- }
-
- @Override
- public void onClientStart() {
- // This method is never called when using HAS_ON_SERVER_START
- // Clients will send requests in response to server heartbeats instead
- }
-
- @Override
- public void onClientReset() {
- removeSchedules();
- clientHasScheduled = false;
- clientRequestCount = 0;
- }
-
- @Override
- public void onClientRecv(VSMessage message) {
- // Clients can receive responses to their requests
- String msgType = message.getString("type");
- if ("CLIENT_RESPONSE".equals(msgType)) {
- boolean success = message.getBoolean("success");
- String result = message.getString("result");
- raftLog("Client received response: success=" + success + ", result=" + result);
- } else if (MSG_APPEND_ENTRIES.equals(msgType)) {
- // Client receives heartbeat from leader - good time to send a request
- if (!clientHasScheduled) {
- clientHasScheduled = true;
- // Schedule first client request after a short delay
- scheduleAt(process.getTime() + 100);
- }
- }
- }
-
- @Override
- public void onClientSchedule() {
- // Send a test client request
- VSMessage request = new VSMessage();
- request.setString("type", MSG_CLIENT_REQUEST);
- request.setString("command", "SET x=" + process.getRandomPercentage());
- request.setLong("clientId", process.getProcessNum());
- request.setLong("requestId", System.currentTimeMillis());
-
- sendMessage(request);
- raftLog("Client sent request #" + clientRequestCount + ": " + request.getString("command"));
-
- // Update request count
- clientRequestCount++;
-
- // Schedule next request after a delay
- if (clientRequestCount < 10) { // Limit number of requests for testing
- scheduleAt(process.getTime() + 1000 + process.getRandomPercentage() * 10);
- }
- }
-
- // --- Raft Algorithm Implementation ---
-
- private void startElection() {
- currentState = State.CANDIDATE;
- currentTerm++;
- votedFor = process.getProcessNum();
- votesReceived.clear();
- votesReceived.add(process.getProcessNum()); // Vote for self
-
- raftLog("Starting election for term " + currentTerm + " (need " + ((getNumProcesses() / 2) + 1) + " votes)");
-
- // Send RequestVote to all other servers
- VSMessage voteRequest = new VSMessage();
- voteRequest.setString("type", MSG_REQUEST_VOTE);
- voteRequest.setInteger("term", currentTerm);
- voteRequest.setInteger("candidateId", process.getProcessNum());
- voteRequest.setInteger("lastLogIndex", log.size() - 1);
- voteRequest.setInteger("lastLogTerm", log.get(log.size() - 1).term);
-
- raftLog("Sending vote request to all processes");
- sendMessage(voteRequest);
-
- // Reset election timeout
- resetElectionTimeout();
- scheduleElectionTimeout();
- }
-
- private void handleRequestVote(VSMessage message, int candidateId) {
- int term = message.getInteger("term");
- int lastLogIndex = message.getInteger("lastLogIndex");
- int lastLogTerm = message.getInteger("lastLogTerm");
-
- raftLog("Received vote request from " + candidateId + " for term " + term);
-
- boolean voteGranted = false;
-
- // Grant vote if:
- // 1. We haven't voted in this term or voted for this candidate
- // 2. Candidate's log is at least as up-to-date as ours
- if (term >= currentTerm &&
- (votedFor == null || votedFor == candidateId) &&
- isLogUpToDate(lastLogIndex, lastLogTerm)) {
-
- votedFor = candidateId;
- voteGranted = true;
- resetElectionTimeout();
-
- raftLog("Voted for candidate " + candidateId + " in term " + term);
- } else {
- raftLog("Did not vote for candidate " + candidateId + " (already voted for " + votedFor + ")");
- }
-
- // Send vote response
- VSMessage response = new VSMessage();
- response.setString("type", MSG_VOTE_RESPONSE);
- response.setInteger("term", currentTerm);
- response.setBoolean("voteGranted", voteGranted);
- response.setInteger("senderId", process.getProcessNum());
-
- // Send directly to candidate
- response.setInteger("receiverNum", candidateId);
- raftLog("Sending vote response to " + candidateId + " (granted=" + voteGranted + ")");
- sendMessage(response);
- }
-
- private void handleVoteResponse(VSMessage message, int senderId) {
- if (currentState != State.CANDIDATE) {
- return;
- }
-
- boolean voteGranted = message.getBoolean("voteGranted");
- if (voteGranted) {
- votesReceived.add(senderId);
-
- raftLog("Received vote from " + senderId + " (total: " + votesReceived.size() + ")");
-
- // Check if we have majority
- int majority = (getNumProcesses() / 2) + 1;
- if (votesReceived.size() >= majority) {
- becomeLeader();
- }
- }
- }
-
- private void becomeLeader() {
- currentState = State.LEADER;
- currentLeader = process.getProcessNum();
-
- raftLog("Became LEADER for term " + currentTerm);
-
- // Initialize leader state
- nextIndex.clear();
- matchIndex.clear();
-
- for (int i = 0; i < getNumProcesses(); i++) {
- if (i != process.getProcessNum()) {
- nextIndex.put(i, log.size());
- matchIndex.put(i, 0);
- }
- }
-
- // Send initial heartbeats immediately
- sendHeartbeats();
-
- // Schedule regular heartbeats
- removeSchedules();
- scheduleAt(process.getTime() + HEARTBEAT_INTERVAL);
-
- // Highlight the leader visually
- if (process instanceof VSInternalProcess) {
- ((VSInternalProcess) process).highlightOn();
- }
- }
-
- private void becomeFollower() {
- currentState = State.FOLLOWER;
-
- raftLog("Became FOLLOWER for term " + currentTerm);
-
- // Remove leader highlighting
- if (process instanceof VSInternalProcess) {
- ((VSInternalProcess) process).highlightOff();
- }
-
- // Reset election timeout
- resetElectionTimeout();
- scheduleElectionTimeout();
- }
-
- private void sendHeartbeats() {
- for (int i = 0; i < getNumProcesses(); i++) {
- if (i != process.getProcessNum()) {
- sendAppendEntries(i);
- }
- }
- }
-
- private void sendAppendEntries(int followerId) {
- int nextIdx = nextIndex.getOrDefault(followerId, 1);
- int prevLogIndex = nextIdx - 1;
- int prevLogTerm = prevLogIndex >= 0 && prevLogIndex < log.size() ? log.get(prevLogIndex).term : 0;
-
- VSMessage appendEntries = new VSMessage();
- appendEntries.setString("type", MSG_APPEND_ENTRIES);
- appendEntries.setInteger("term", currentTerm);
- appendEntries.setInteger("leaderId", process.getProcessNum());
- appendEntries.setInteger("prevLogIndex", prevLogIndex);
- appendEntries.setInteger("prevLogTerm", prevLogTerm);
- appendEntries.setInteger("leaderCommit", commitIndex);
-
- // Include log entries if needed
- List<LogEntry> entries = new ArrayList<>();
- for (int i = nextIdx; i < log.size(); i++) {
- entries.add(log.get(i));
- }
-
- // For simplicity, we'll send entry count and details separately
- appendEntries.setInteger("entryCount", entries.size());
- for (int i = 0; i < entries.size(); i++) {
- LogEntry entry = entries.get(i);
- appendEntries.setInteger("entry_" + i + "_term", entry.term);
- appendEntries.setString("entry_" + i + "_cmd", entry.command);
- appendEntries.setLong("entry_" + i + "_time", entry.timestamp);
- }
-
- appendEntries.setInteger("receiverNum", followerId);
- sendMessage(appendEntries);
- }
-
- private void handleAppendEntries(VSMessage message, int leaderId) {
- int term = message.getInteger("term");
- int prevLogIndex = message.getInteger("prevLogIndex");
- int prevLogTerm = message.getInteger("prevLogTerm");
- int leaderCommit = message.getInteger("leaderCommit");
-
- // Reset election timeout when we hear from leader
- resetElectionTimeout();
- lastHeartbeat = process.getTime();
- currentLeader = leaderId;
-
- boolean success = false;
-
- // Check if log matches at prevLogIndex
- if (prevLogIndex == 0 ||
- (prevLogIndex < log.size() && log.get(prevLogIndex).term == prevLogTerm)) {
-
- success = true;
-
- // Remove conflicting entries
- if (prevLogIndex + 1 < log.size()) {
- log.subList(prevLogIndex + 1, log.size()).clear();
- }
-
- // Append new entries
- int entryCount = message.getInteger("entryCount");
- for (int i = 0; i < entryCount; i++) {
- int entryTerm = message.getInteger("entry_" + i + "_term");
- String entryCmd = message.getString("entry_" + i + "_cmd");
- long entryTime = message.getLong("entry_" + i + "_time");
-
- log.add(new LogEntry(entryTerm, entryCmd, entryTime));
- raftLog("Appended log entry: " + entryCmd);
- }
-
- // Update commit index
- if (leaderCommit > commitIndex) {
- commitIndex = Math.min(leaderCommit, log.size() - 1);
- applyStateMachine();
- }
- }
-
- // Send response
- VSMessage response = new VSMessage();
- response.setString("type", MSG_APPEND_RESPONSE);
- response.setInteger("term", currentTerm);
- response.setBoolean("success", success);
- response.setInteger("senderId", process.getProcessNum());
- response.setInteger("matchIndex", log.size() - 1);
- response.setInteger("receiverNum", leaderId);
-
- sendMessage(response);
- }
-
- private void handleAppendResponse(VSMessage message, int followerId) {
- if (currentState != State.LEADER) {
- return;
- }
-
- boolean success = message.getBoolean("success");
- int matchIdx = message.getInteger("matchIndex");
-
- if (success) {
- matchIndex.put(followerId, matchIdx);
- nextIndex.put(followerId, matchIdx + 1);
-
- // Check if we can advance commit index
- updateCommitIndex();
- } else {
- // Decrement nextIndex and retry
- int next = nextIndex.getOrDefault(followerId, 1);
- if (next > 1) {
- nextIndex.put(followerId, next - 1);
- }
- }
- }
-
- private void handleClientRequest(VSMessage message, int clientId) {
- if (currentState != State.LEADER) {
- // Redirect to leader or reject
- VSMessage response = new VSMessage();
- response.setString("type", "CLIENT_RESPONSE");
- response.setBoolean("success", false);
- response.setString("result", "Not leader. Leader is: " + currentLeader);
- response.setInteger("receiverNum", clientId);
- sendMessage(response);
- return;
- }
-
- // Append to log
- String command = message.getString("command");
- LogEntry entry = new LogEntry(currentTerm, command, process.getTime());
- log.add(entry);
-
- raftLog("Leader received client request: " + command);
-
- // Will be committed when replicated to majority
- // For now, send optimistic response
- VSMessage response = new VSMessage();
- response.setString("type", "CLIENT_RESPONSE");
- response.setBoolean("success", true);
- response.setString("result", "Command logged: " + command);
- response.setInteger("receiverNum", clientId);
- sendMessage(response);
- }
-
- // --- Helper Methods ---
-
- private boolean isLogUpToDate(int lastLogIndex, int lastLogTerm) {
- int ourLastIndex = log.size() - 1;
- int ourLastTerm = log.get(ourLastIndex).term;
-
- return lastLogTerm > ourLastTerm ||
- (lastLogTerm == ourLastTerm && lastLogIndex >= ourLastIndex);
- }
-
- private void resetElectionTimeout() {
- if (process != null) {
- long timeout = ELECTION_TIMEOUT_MIN +
- (long)(Math.random() * (ELECTION_TIMEOUT_MAX - ELECTION_TIMEOUT_MIN));
- electionTimeout = process.getTime() + timeout;
- }
- }
-
- private void scheduleElectionTimeout() {
- removeSchedules();
- scheduleAt(electionTimeout);
- }
-
- private void updateCommitIndex() {
- // Find the highest index that has been replicated to majority
- for (int n = log.size() - 1; n > commitIndex; n--) {
- if (log.get(n).term == currentTerm) {
- int replicatedCount = 1; // Leader has it
-
- for (int matchIdx : matchIndex.values()) {
- if (matchIdx >= n) {
- replicatedCount++;
- }
- }
-
- if (replicatedCount > getNumProcesses() / 2) {
- commitIndex = n;
- applyStateMachine();
- break;
- }
- }
- }
- }
-
- private void applyStateMachine() {
- while (lastApplied < commitIndex) {
- lastApplied++;
- LogEntry entry = log.get(lastApplied);
- raftLog("Applied to state machine: " + entry.command);
- }
- }
-
- private void raftLog(String message) {
- String stateStr = currentState != null ? currentState.toString() : "CLIENT";
- String prefix = String.format("[%s T:%d N:%d] ",
- stateStr, currentTerm, process.getProcessNum());
- process.log(prefix + message);
- }
-
- @Override
- public String toString() {
- return super.toString() + " - Raft Consensus";
- }
-} \ No newline at end of file
diff --git a/src/main/java/simulator/builder/SimulationBuilder.java b/src/main/java/simulator/builder/SimulationBuilder.java
index 8ac5d04..c35f0ea 100644
--- a/src/main/java/simulator/builder/SimulationBuilder.java
+++ b/src/main/java/simulator/builder/SimulationBuilder.java
@@ -351,7 +351,6 @@ public class SimulationBuilder {
* Fluent API for common protocol setups
*/
public static class Protocols {
- public static final String RAFT = "protocols.implementations.VSRaftProtocol";
public static final String PING_PONG = "protocols.implementations.VSPingPongProtocol";
public static final String BERKLEY_TIME = "protocols.implementations.VSBerkelyTimeProtocol";
public static final String BROADCAST = "protocols.implementations.VSBroadcastProtocol";
diff --git a/src/main/java/simulator/builder/SimulationFactory.java b/src/main/java/simulator/builder/SimulationFactory.java
index c06be00..2bd73b9 100644
--- a/src/main/java/simulator/builder/SimulationFactory.java
+++ b/src/main/java/simulator/builder/SimulationFactory.java
@@ -8,38 +8,6 @@ import java.util.stream.IntStream;
*/
public class SimulationFactory {
- /**
- * Create a standard Raft consensus simulation
- * @param numServers Number of Raft servers (minimum 3 for consensus)
- * @param numClients Number of client processes
- * @return Configured SimulationBuilder
- */
- public static SimulationBuilder createRaftSimulation(int numServers, int numClients) throws Exception {
- if (numServers < 3) {
- throw new IllegalArgumentException("Raft requires at least 3 servers for consensus");
- }
-
- return new SimulationBuilder()
- .withProcesses(numServers + numClients)
- .withProtocol(SimulationBuilder.Protocols.RAFT)
- .withDuration(15000) // 15 seconds to see leader election
- .activateServers(IntStream.range(0, numServers).toArray())
- .activateClients(500, IntStream.range(numServers, numServers + numClients).toArray());
- }
-
- /**
- * Create a Raft simulation with fault tolerance testing
- * @param numServers Number of Raft servers
- * @return Configured SimulationBuilder with crash/recovery events
- */
- public static SimulationBuilder createRaftFaultToleranceSimulation(int numServers) throws Exception {
- return createRaftSimulation(numServers, 0)
- .withDuration(30000) // 30 seconds for fault testing
- .addCrashEvent(0, 5000) // Crash leader after 5s
- .addRecoveryEvent(0, 10000) // Recover after 10s
- .addCrashEvent(1, 15000) // Crash another server
- .addRecoveryEvent(1, 20000); // Recover after 20s
- }
/**
* Create a simple ping-pong simulation