From 25d3d6d1ff6f57ad354f03a0b6cc4f1a897bb342 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kjetil=20=C3=98rbekk?= <kjetil.orbekk@gmail.com>
Date: Thu, 16 Feb 2012 15:43:43 +0100
Subject: Implement all MasterService operations in NewMaster.

Tested with tests ported from old MasterImplTest.
---
 same/src/main/java/com/orbekk/same/NewMaster.java | 71 ++++++++++++++++++++++-
 1 file changed, 69 insertions(+), 2 deletions(-)

(limited to 'same/src/main/java/com')

diff --git a/same/src/main/java/com/orbekk/same/NewMaster.java b/same/src/main/java/com/orbekk/same/NewMaster.java
index 161586f..c2b2d9b 100644
--- a/same/src/main/java/com/orbekk/same/NewMaster.java
+++ b/same/src/main/java/com/orbekk/same/NewMaster.java
@@ -1,5 +1,7 @@
 package com.orbekk.same;
 
+import com.orbekk.same.State.Component;
+import java.util.Collections;
 import java.util.List;
 import com.orbekk.util.WorkQueue;
 import org.slf4j.Logger;
@@ -29,36 +31,101 @@ public class NewMaster {
         @Override
         public boolean updateStateRequest(String component,
                 String newData, long revision) {
-            return false;
+            logger.info("updateStateRequest({}, {}, {})",
+                    new Object[]{component, newData, revision});
+            boolean updated = state.update(component, newData, revision + 1);
+            if (updated) {
+                updateStateRequestThread.add(component);
+            }
+            return updated;
         }
 
         @Override
         public void joinNetworkRequest(String clientUrl) {
+            logger.info("joinNetworkRequest({})", clientUrl);
+            List<String> participants = state.getList(".participants");
+            sendFullStateThread.add(clientUrl);
+            if (!participants.contains(clientUrl)) {
+                participants.add(clientUrl);
+                synchronized (NewMaster.this) {
+                    state.updateFromObject(".participants", participants,
+                            state.getRevision(".participants") + 1);
+                }
+                updateStateRequestThread.add(".participants");
+            } else {
+                logger.warn("Client {} joining: Already part of network");
+            }
         }
     };
 
     WorkQueue<String> updateStateRequestThread = new WorkQueue<String>() {
         @Override protected void onChange() {
             List<String> pending = getAndClear();
+            logger.info("updateStateRequestThread: Updated state: {}",
+                    pending);
             for (String componentName : pending) {
-                logger.info("Component updated: {}", componentName); 
+                Component component = state.getComponent(componentName);
+                List<String> participants = state.getList(".participants");
+                broadcastNewComponents(participants,
+                        Collections.singletonList(component));
             }
         }
     };
 
+    WorkQueue<String> sendFullStateThread = new WorkQueue<String>() {
+        @Override protected void onChange() {
+            List<String> pending = getAndClear();
+            logger.info("Sending full state to {}", pending);
+            final List<Component> components = state.getComponents();
+            broadcastNewComponents(pending, components);
+        }
+    };
+
     void performWork() {
+        sendFullStateThread.performWork();
         updateStateRequestThread.performWork();
     }
 
     public void start() {
+        sendFullStateThread.start();
         updateStateRequestThread.start();
     }
 
     public void interrupt() {
+        sendFullStateThread.interrupt();
         updateStateRequestThread.interrupt();
     }
 
     public MasterService getService() {
         return serviceImpl;
     }
+
+    private synchronized void removeParticipant(String url) {
+        List<String> participants = state.getList(".participants");
+        if (participants.contains(url)) {
+            logger.info("removeParticipant({})", url);
+            participants.remove(url);
+            state.updateFromObject(".participants", participants,
+                    state.getRevision(".participants") + 1);
+            updateStateRequestThread.add(".participants");
+        }
+    }
+
+    private void broadcastNewComponents(List<String> destinations,
+            final List<State.Component> components) {
+        broadcaster.broadcast(destinations, new ServiceOperation() {
+            @Override public void run(String url) {
+                 ClientService client = connections.getClient(url);
+                 try {
+                     for (Component c : components) {
+                         client.setState(c.getName(), c.getData(),
+                                 c.getRevision());
+                     }
+                 } catch (Exception e) {
+                     logger.info("Client {} failed to receive state update.", url);
+                     removeParticipant(url);
+                 }
+            }
+        });
+    }
 }
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