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-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java30
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java11
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/Executor.java4
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/AgentMessage.java29
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RMIMessage.java14
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/TimerSchedulerMessage.java14
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Module.java24
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/ModuleType.java12
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/RMI.java8
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/TimerScheduler.java9
10 files changed, 95 insertions, 60 deletions
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java
index 4e75a51..1b078cf 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Agent.java
@@ -5,29 +5,29 @@ import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
-import pl.edu.mimuw.cloudatlas.agent.messages.AgentMessage;
import pl.edu.mimuw.cloudatlas.agent.modules.Module;
+import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType;
import pl.edu.mimuw.cloudatlas.agent.modules.RMI;
import pl.edu.mimuw.cloudatlas.agent.modules.TimerScheduler;
public class Agent {
- public static HashMap<AgentMessage.AgentModule, Module> initializeModules() {
- HashMap<AgentMessage.AgentModule, Module> modules = new HashMap<AgentMessage.AgentModule, Module>();
- modules.put(AgentMessage.AgentModule.TIMER_SCHEDULER, new TimerScheduler(AgentMessage.AgentModule.TIMER_SCHEDULER));
- modules.put(AgentMessage.AgentModule.RMI, new RMI(AgentMessage.AgentModule.RMI));
+ public static HashMap<ModuleType, Module> initializeModules() {
+ HashMap<ModuleType, Module> modules = new HashMap<ModuleType, Module>();
+ modules.put(ModuleType.TIMER_SCHEDULER, new TimerScheduler(ModuleType.TIMER_SCHEDULER));
+ modules.put(ModuleType.RMI, new RMI(ModuleType.RMI));
// TODO add modules as we implement them
return modules;
}
- public static HashMap<AgentMessage.AgentModule, Executor> initializeExecutors(
- HashMap<AgentMessage.AgentModule, Module> modules) {
- HashMap<AgentMessage.AgentModule, Executor> executors = new HashMap<AgentMessage.AgentModule, Executor>();
+ public static HashMap<ModuleType, Executor> initializeExecutors(
+ HashMap<ModuleType, Module> modules) {
+ HashMap<ModuleType, Executor> executors = new HashMap<ModuleType, Executor>();
Iterator it = modules.entrySet().iterator();
while (it.hasNext()) {
- Map.Entry<AgentMessage.AgentModule, Module> moduleEntry =
- (Map.Entry<AgentMessage.AgentModule, Module>) it.next();
+ Map.Entry<ModuleType, Module> moduleEntry =
+ (Map.Entry<ModuleType, Module>) it.next();
Module module = moduleEntry.getValue();
Executor executor = new Executor(module);
executors.put(moduleEntry.getKey(), executor);
@@ -36,13 +36,13 @@ public class Agent {
return executors;
}
- public static ArrayList<Thread> initializeExecutorThreads(HashMap<AgentMessage.AgentModule, Executor> executors) {
+ public static ArrayList<Thread> initializeExecutorThreads(HashMap<ModuleType, Executor> executors) {
ArrayList<Thread> executorThreads = new ArrayList<Thread>();
Iterator it = executors.entrySet().iterator();
while (it.hasNext()) {
- Map.Entry<AgentMessage.AgentModule, Executor> executorEntry =
- (Map.Entry<AgentMessage.AgentModule, Executor>) it.next();
+ Map.Entry<ModuleType, Executor> executorEntry =
+ (Map.Entry<ModuleType, Executor>) it.next();
Thread thread = new Thread(executorEntry.getValue());
thread.setDaemon(true);
System.out.println("Initializing executor " + executorEntry.getKey());
@@ -60,8 +60,8 @@ public class Agent {
}
public static void runModulesAsThreads() {
- HashMap<AgentMessage.AgentModule, Module> modules = initializeModules();
- HashMap<AgentMessage.AgentModule, Executor> executors = initializeExecutors(modules);
+ HashMap<ModuleType, Module> modules = initializeModules();
+ HashMap<ModuleType, Executor> executors = initializeExecutors(modules);
ArrayList<Thread> executorThreads = initializeExecutorThreads(executors);
Thread eventBusThread = new Thread(new EventBus(executors));
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java
index 37c125a..4f939b6 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java
@@ -1,6 +1,7 @@
package pl.edu.mimuw.cloudatlas.agent;
import pl.edu.mimuw.cloudatlas.agent.messages.AgentMessage;
+import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType;
import java.util.HashMap;
import java.util.Iterator;
@@ -12,18 +13,18 @@ import java.util.concurrent.LinkedBlockingQueue;
*/
public class EventBus implements Runnable {
private LinkedBlockingQueue<AgentMessage> events;
- private HashMap<AgentMessage.AgentModule, Executor> executors;
+ private HashMap<ModuleType, Executor> executors;
void setEventBusReference() {
Iterator it = this.executors.entrySet().iterator();
while (it.hasNext()) {
- Map.Entry<AgentMessage.AgentModule, Executor> executorEntry =
- (Map.Entry<AgentMessage.AgentModule, Executor>) it.next();
+ Map.Entry<ModuleType, Executor> executorEntry =
+ (Map.Entry<ModuleType, Executor>) it.next();
executorEntry.getValue().setEventBus(this);
}
}
- EventBus(HashMap<AgentMessage.AgentModule, Executor> executors) {
+ EventBus(HashMap<ModuleType, Executor> executors) {
this.executors = executors;
setEventBusReference();
this.events = new LinkedBlockingQueue<AgentMessage>();
@@ -43,13 +44,11 @@ public class EventBus implements Runnable {
}
public void routeMessage(AgentMessage msg) throws InterruptedException {
- assert msg.getCorrectMessageType() == msg.getDestinationModule();
System.out.println("Event bus routing message");
executors.get(msg.getDestinationModule()).addMessage(msg);
}
public void addMessage(AgentMessage msg) throws InterruptedException {
- assert msg.getCorrectMessageType() == msg.getDestinationModule();
this.events.put(msg);
}
}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/Executor.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Executor.java
index 6ebf6a6..d648fac 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/Executor.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Executor.java
@@ -30,6 +30,10 @@ public class Executor implements Runnable {
} catch (InterruptedException e) {
System.out.println("Executor interrupted. Exiting loop.");
break;
+ } catch (Module.InvalidMessageType e) {
+ System.out.println("Executor got a message with type it can't handle");
+ System.out.println(e);
+ break;
}
}
}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/AgentMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/AgentMessage.java
index b71831f..f343e0f 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/AgentMessage.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/AgentMessage.java
@@ -1,36 +1,25 @@
package pl.edu.mimuw.cloudatlas.agent.messages;
-public abstract class AgentMessage {
-
- public enum AgentModule {
- TIMER_SCHEDULER,
- TIMER_GTP,
- RMI,
- UDP,
- GOSSIP_IN,
- GOSSIP_OUT,
- STATE,
- QUERY
- }
+import pl.edu.mimuw.cloudatlas.agent.modules.Module;
+import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType;
+public abstract class AgentMessage {
private String messageId;
- private AgentModule destinationModule;
+ private ModuleType destinationModule;
private long timestamp;
- public AgentMessage(String messageId, AgentModule destinationModule, long timestamp) {
+ public AgentMessage(String messageId, ModuleType destinationModule, long timestamp) {
this.messageId = messageId;
this.destinationModule = destinationModule;
this.timestamp = timestamp;
}
- public AgentMessage(String messageId, AgentModule destinationModule) {
+ public AgentMessage(String messageId, ModuleType destinationModule) {
this.messageId = messageId;
this.destinationModule = destinationModule;
this.timestamp = System.currentTimeMillis() / 1000L;
}
- public abstract AgentModule getCorrectMessageType();
-
public String getMessageId() {
return messageId;
}
@@ -39,14 +28,16 @@ public abstract class AgentMessage {
this.messageId = messageId;
}
- public AgentModule getDestinationModule() {
+ public ModuleType getDestinationModule() {
return destinationModule;
}
- public void setDestinationModule(AgentModule destinationModule) {
+ public void setDestinationModule(ModuleType destinationModule) {
this.destinationModule = destinationModule;
}
+ public abstract void callMe(Module module) throws InterruptedException, Module.InvalidMessageType;
+
public long getTimestamp() {
return timestamp;
}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RMIMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RMIMessage.java
new file mode 100644
index 0000000..a8e3afb
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/RMIMessage.java
@@ -0,0 +1,14 @@
+package pl.edu.mimuw.cloudatlas.agent.messages;
+
+import pl.edu.mimuw.cloudatlas.agent.modules.Module;
+import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType;
+
+public class RMIMessage extends AgentMessage {
+ public RMIMessage(String messageId, long timestamp) {
+ super(messageId, ModuleType.RMI, timestamp);
+ }
+
+ public void callMe(Module module) throws InterruptedException, Module.InvalidMessageType {
+ module.handleTyped(this);
+ }
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/TimerSchedulerMessage.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/TimerSchedulerMessage.java
index 333b381..8566d67 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/TimerSchedulerMessage.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/messages/TimerSchedulerMessage.java
@@ -1,6 +1,8 @@
package pl.edu.mimuw.cloudatlas.agent.messages;
import pl.edu.mimuw.cloudatlas.agent.modules.TimerScheduledTask;
+import pl.edu.mimuw.cloudatlas.agent.modules.Module;
+import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType;
public class TimerSchedulerMessage extends AgentMessage {
private String requestId;
@@ -9,13 +11,12 @@ public class TimerSchedulerMessage extends AgentMessage {
private TimerScheduledTask task;
public TimerSchedulerMessage(String messageId,
- AgentModule destinationModule,
long timestamp,
String requestId,
long delay,
long baseTime,
TimerScheduledTask task) {
- super(messageId, destinationModule, timestamp);
+ super(messageId, ModuleType.TIMER_SCHEDULER, timestamp);
this.requestId = requestId;
this.delay = delay;
this.baseTime = baseTime;
@@ -48,10 +49,9 @@ public class TimerSchedulerMessage extends AgentMessage {
public String getRequestId() { return requestId; }
- public void setRequestId(String requestId) { this.requestId = requestId; }
-
- @Override
- public AgentModule getCorrectMessageType() {
- return AgentModule.TIMER_SCHEDULER;
+ public void callMe(Module module) throws InterruptedException, Module.InvalidMessageType {
+ module.handleTyped(this);
}
+
+ public void setRequestId(String requestId) { this.requestId = requestId; }
}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Module.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Module.java
index 9744971..a50a95f 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Module.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Module.java
@@ -2,19 +2,37 @@ package pl.edu.mimuw.cloudatlas.agent.modules;
import pl.edu.mimuw.cloudatlas.agent.Executor;
import pl.edu.mimuw.cloudatlas.agent.messages.AgentMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.TimerSchedulerMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.RMIMessage;
/*
* A Module is a (potentially stateful) event handler.
*/
public abstract class Module {
- protected AgentMessage.AgentModule moduleType;
+ public class InvalidMessageType extends Exception {
+ public InvalidMessageType(String message) {
+ super(message);
+ }
+ }
+
+ protected ModuleType moduleType;
protected Executor executor;
- public Module(AgentMessage.AgentModule moduleType) {
+ public Module(ModuleType moduleType) {
this.moduleType = moduleType;
}
- public abstract void handle(AgentMessage event) throws InterruptedException ;
+ public void handle(AgentMessage event) throws InterruptedException, InvalidMessageType {
+ event.callMe(this);
+ }
+
+ public void handleTyped(TimerSchedulerMessage message) throws InterruptedException, InvalidMessageType {
+ throw new InvalidMessageType("Got a TimerSchedulerMessage in module " + moduleType.toString());
+ }
+
+ public void handleTyped(RMIMessage message) throws InterruptedException, InvalidMessageType {
+ throw new InvalidMessageType("Got an RMIMessage in module " + moduleType.toString());
+ }
public void setExecutor(Executor executor) {
this.executor = executor;
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/ModuleType.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/ModuleType.java
new file mode 100644
index 0000000..ff4a92e
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/ModuleType.java
@@ -0,0 +1,12 @@
+package pl.edu.mimuw.cloudatlas.agent.modules;
+
+public enum ModuleType {
+ TIMER_SCHEDULER,
+ TIMER_GTP,
+ RMI,
+ UDP,
+ GOSSIP_IN,
+ GOSSIP_OUT,
+ STATE,
+ QUERY
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/RMI.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/RMI.java
index 452b214..1a86fc7 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/RMI.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/RMI.java
@@ -2,7 +2,7 @@ package pl.edu.mimuw.cloudatlas.agent.modules;
import pl.edu.mimuw.cloudatlas.agent.ApiImplementation;
import pl.edu.mimuw.cloudatlas.agent.messages.AgentMessage;
-import pl.edu.mimuw.cloudatlas.agent.messages.TimerSchedulerMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.RMIMessage;
import pl.edu.mimuw.cloudatlas.api.Api;
import pl.edu.mimuw.cloudatlas.interpreter.Main;
import pl.edu.mimuw.cloudatlas.model.ZMI;
@@ -12,7 +12,7 @@ import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;
public class RMI extends Module {
- public RMI(AgentMessage.AgentModule moduleType) {
+ public RMI(ModuleType moduleType) {
super(moduleType);
runRegistry();
}
@@ -32,8 +32,6 @@ public class RMI extends Module {
}
}
- @Override
- public void handle(AgentMessage event) throws InterruptedException {
- assert event.getDestinationModule() == event.getCorrectMessageType();
+ public void handleTyped(RMIMessage event) throws InterruptedException {
}
}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/TimerScheduler.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/TimerScheduler.java
index 9390940..68a9326 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/TimerScheduler.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/TimerScheduler.java
@@ -2,6 +2,7 @@ package pl.edu.mimuw.cloudatlas.agent.modules;
import pl.edu.mimuw.cloudatlas.agent.messages.AgentMessage;
import pl.edu.mimuw.cloudatlas.agent.messages.TimerSchedulerMessage;
+import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType;
import java.util.Timer;
@@ -17,17 +18,15 @@ import java.util.Timer;
public class TimerScheduler extends Module {
private Timer timer;
- public TimerScheduler(AgentMessage.AgentModule moduleType) {
+ public TimerScheduler(ModuleType moduleType) {
super(moduleType);
- assert moduleType == AgentMessage.AgentModule.TIMER_SCHEDULER;
+ assert moduleType == ModuleType.TIMER_SCHEDULER;
this.timer = new Timer();
System.out.println("TimerScheduler instance initialized");
}
@Override
- public void handle(AgentMessage event) throws InterruptedException {
- assert event.getDestinationModule() == event.getCorrectMessageType();
- TimerSchedulerMessage timerEvent = (TimerSchedulerMessage) event;
+ public void handleTyped(TimerSchedulerMessage timerEvent) throws InterruptedException {
addTask(timerEvent);
}