Add stream create without timestamp (#43)

Author: lujiajing1126

CHANGES.md

@@ -9,6 +9,7 @@ Release Notes.
 * Support new TopN query protocol
 * Remove ID type of TAG
 * Make the global singleton MetadataCache client-local
+* Add createStreamWrite API to allow late timestamp set
 
 0.3.1
 ------------------

src/main/java/org/apache/skywalking/banyandb/v1/client/BanyanDBClient.java

@@ -269,6 +269,18 @@ public MeasureWrite createMeasureWrite(String group, String name, long timestamp
         return new MeasureWrite(this.metadataCache.findMetadata(group, name), timestamp);
     }
 
+    /**
+     * Build a StreamWrite request.
+     *
+     * @param group     the group of the stream
+     * @param name      the name of the stream
+     * @param elementId the primary key of the stream
+     * @return the request to be built
+     */
+    public StreamWrite createStreamWrite(String group, String name, final String elementId) {
+        return new StreamWrite(this.metadataCache.findMetadata(group, name), elementId);
+    }
+
     /**
      * Build a StreamWrite request.
      *