Merge pull request #813 from hollow/get_brokers

make list of brokers available through sarama.Client

client.go

@@ -17,6 +17,9 @@ type Client interface {
 	// altered after it has been created.
 	Config() *Config
 
+	// Brokers returns the current set of active brokers as retrieved from cluster metadata.
+	Brokers() []*Broker
+
 	// Topics returns the set of available topics as retrieved from cluster metadata.
 	Topics() ([]string, error)
 
@@ -157,6 +160,16 @@ func (client *client) Config() *Config {
 	return client.conf
 }
 
+func (client *client) Brokers() []*Broker {
+	client.lock.RLock()
+	defer client.lock.RUnlock()
+	brokers := make([]*Broker, 0)
+	for _, broker := range client.brokers {
+		brokers = append(brokers, broker)
+	}
+	return brokers
+}
+
 func (client *client) Close() error {
 	if client.Closed() {
 		// Chances are this is being called from a defer() and the error will go unobserved