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-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java7
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/Executor.java35
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/Module.java10
3 files changed, 52 insertions, 0 deletions
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java
new file mode 100644
index 0000000..47cb1ff
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/EventBus.java
@@ -0,0 +1,7 @@
+package pl.edu.mimuw.cloudatlas.agent;
+
+/*
+ * The EventBus routes messages sent between Modules.
+ */
+public class EventBus {
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/Executor.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Executor.java
new file mode 100644
index 0000000..0651a9b
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Executor.java
@@ -0,0 +1,35 @@
+package pl.edu.mimuw.cloudatlas.agent;
+
+import java.util.concurrent.LinkedBlockingQueue;
+
+import pl.edu.mimuw.cloudatlas.agent.message.AgentMessage;
+
+/*
+ * Queues messages sent to a particular module and ensures they are eventually
+ * handled.
+ */
+public class Executor implements Runnable {
+ private Module module;
+ private LinkedBlockingQueue<AgentMessage> events;
+
+ public Executor(Module module) {
+ this.module = module;
+ this.events = new LinkedBlockingQueue<AgentMessage>();
+ }
+
+ public void run() {
+ while (!Thread.currentThread().interrupted()) {
+ try {
+ AgentMessage event = events.take();
+ module.handle(event);
+ } catch (InterruptedException e) {
+ System.out.println("Executor interrupted. Exiting loop.");
+ break;
+ }
+ }
+ }
+
+ public void addMessage(AgentMessage event) throws InterruptedException {
+ events.put(event);
+ }
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/Module.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Module.java
new file mode 100644
index 0000000..46df31b
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/Module.java
@@ -0,0 +1,10 @@
+package pl.edu.mimuw.cloudatlas.agent;
+
+import pl.edu.mimuw.cloudatlas.agent.message.AgentMessage;
+
+/*
+ * A Module is a (potentially stateful) event handler.
+ */
+public abstract class Module {
+ public abstract void handle(AgentMessage event);
+}