solucao lab2

common/consistenthash/consistenthash.go

@@ -21,6 +21,16 @@ func (r *Ring) search(key string) int {
     /////////////////////////
     // YOUR CODE GOES HERE //
     /////////////////////////
+    r.Lock()
+    defer r.Unlock()
+
+    hash := hashId(key)
+
+    for i, node := range r.Nodes {
+        if node.HashId > hash {
+            return i
+        }
+    }
 
     return 0
 }

dynamo/cache.go

@@ -12,6 +12,7 @@ import (
 // Cache is the struct that handle all the data storage for the dynamo server.
 type Cache struct {
     data map[string]string
+    time map[string]int64
     sync.Mutex
 }
 
@@ -20,6 +21,7 @@ func NewCache() *Cache {
     var s Cache
 
     s.data = make(map[string]string)
+    s.time = make(map[string]int64)
 
     return &s
 }
@@ -29,7 +31,7 @@ func NewCache() *Cache {
 func (cache *Cache) Get(key string) (value string, timestamp int64) {
     cache.Lock()
     value = cache.data[key]
-    timestamp = 0
+    timestamp = cache.time[key]
     cache.Unlock()
 
     log.Printf("[CACHE] Getting Key '%v' with Value '%v' @ timestamp '%v'\n", key, value, timestamp)
@@ -43,6 +45,7 @@ func (cache *Cache) Put(key string, value string, timestamp int64) {
 
     cache.Lock()
     cache.data[key] = value
+    cache.time[key] = timestamp
     cache.Unlock()
 
     return

dynamo/coordinator.go

@@ -186,13 +186,33 @@ func (server *Server) Voting(key string, quorum int) (string, error) {
 
 // aggregateVotes will select the right value from the votes received.
 func aggregateVotes(votes []*vote) (result string) {
+	var (
+		horario_max int64
+	)
+
+	horario_max = 0
+
 	for _, vote := range votes {
 		log.Printf("[COORDINATOR] Vote: %v\n", vote.value)
+
+		if vote.timestamp > horario_max {
+			result = vote.value
+			horario_max = vote.timestamp
+		}
+
 	}
 
 	/////////////////////////
 	// YOUR CODE GOES HERE //
 	/////////////////////////
-	result = votes[0].value
+	//result = votes[0].value
+
 	return
 }
+
+
+// type vote struct {
+//   	value     string
+//      timestamp int64
+//  	err       error
+// }