Optimize API

Optimize API added:
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/in
dices-optimize.html#indices-optimize

goes.go

@@ -75,6 +75,20 @@ func (c *Connection) RefreshIndex(name string) (Response, error) {
 	return r.Run()
 }
 
+// Optimize an index represented by a name, extra args are also allowed please check:
+// http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-optimize.html#indices-optimize
+func (c *Connection) Optimize(indexList []string, extraArgs url.Values) (Response, error) {
+	r := Request{
+		Conn:      c,
+		IndexList: indexList,
+		ExtraArgs: extraArgs,
+		method:    "POST",
+		api:       "_optimize",
+	}
+
+	return r.Run()
+}
+
 // Stats fetches statistics (_stats) for the current elasticsearch server
 func (c *Connection) Stats(indexList []string, extraArgs url.Values) (Response, error) {
 	r := Request{

goes_test.go

@@ -190,6 +190,26 @@ func (s *GoesTestSuite) TestRefreshIndex(c *C) {
 	c.Assert(err, IsNil)
 }
 
+func (s *GoesTestSuite) TestOptimize(c *C) {
+	conn := NewConnection(ES_HOST, ES_PORT)
+	indexName := "testoptimize"
+
+	conn.DeleteIndex(indexName)
+	_, err := conn.CreateIndex(indexName, map[string]interface{}{})
+	c.Assert(err, IsNil)
+
+	// we must wait for a bit otherwise ES crashes
+	time.Sleep(1 * time.Second)
+
+	response, err := conn.Optimize([]string{indexName}, url.Values{"max_num_segments" : []string{"1"}})
+	c.Assert(err, IsNil)
+
+	c.Assert(response.All.Indices[indexName].Primaries["docs"].Count, Equals, 0)
+
+	_, err = conn.DeleteIndex(indexName)
+	c.Assert(err, IsNil)
+}
+
 func (s *GoesTestSuite) TestBulkSend(c *C) {
 	indexName := "testbulkadd"
 	docType := "tweet"