From ca2f1ab4a37f0d590d5c116cd1fa7c341c77fad3 Mon Sep 17 00:00:00 2001
From: Marcin Chrzanowski <marcin.j.chrzanowski@gmail.com>
Date: Mon, 30 Dec 2019 22:16:46 +0100
Subject: Implement modular getZoneSet

---
 .../edu/mimuw/cloudatlas/agent/modules/Remik.java  | 54 ++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Remik.java

(limited to 'src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Remik.java')

diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Remik.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Remik.java
new file mode 100644
index 0000000..9645d71
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Remik.java
@@ -0,0 +1,54 @@
+package pl.edu.mimuw.cloudatlas.agent.modules;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.HashMap;
+import java.util.Map;
+
+
+import pl.edu.mimuw.cloudatlas.agent.messages.GetStateMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.RemikMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.RequestStateMessage;
+import pl.edu.mimuw.cloudatlas.agent.messages.ResponseMessage;
+
+/*
+ * Remik is a cute little module that allows RMI functions to interface with
+ * agent's asynchronous modules.
+ */
+public class Remik extends Module {
+    private Map<Long, CompletableFuture<ResponseMessage>> awaitingRequests;
+    private long nextRequestId = 0;
+
+    public Remik() {
+        super(ModuleType.RMI);
+        awaitingRequests = new HashMap();
+    }
+
+    public void handleTyped(RemikMessage message) throws InvalidMessageType, InterruptedException {
+        switch (message.getType()) {
+            case REQUEST_STATE:
+                handleRequestState((RequestStateMessage) message);
+                break;
+            default:
+                throw new InvalidMessageType("This type of message cannot be handled by Remik");
+        }
+    }
+
+    public void handleTyped(ResponseMessage message) {
+        CompletableFuture<ResponseMessage> responseFuture = awaitingRequests.get(message.getRequestId());
+
+        if (responseFuture == null) {
+            System.out.println("ERROR: Remik got response for nonexistent/finished request");
+        } else {
+            responseFuture.complete(message);
+        }
+    }
+
+    private void handleRequestState(RequestStateMessage message) throws InterruptedException {
+        awaitingRequests.put(nextRequestId, message.getFuture());
+
+        GetStateMessage getStateMessage = new GetStateMessage("", 0, ModuleType.RMI, nextRequestId);
+        nextRequestId++;
+
+        sendMessage(getStateMessage);
+    }
+}
-- 
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