add more examples for queries (#61)

src/main/java/com/rockset/examples/QueryExample.java

@@ -1,12 +1,16 @@
 package com.rockset.examples;
 
+import com.google.gson.internal.LinkedTreeMap;
 import com.rockset.client.RocksetClient;
 import com.rockset.client.model.*;
 
+import java.util.Map;
+
 public class QueryExample {
-  public static void main(String[] args) {
+  public static void main(String[] args) throws Exception {
     RocksetClient rs = new RocksetClient("<apiKey>", "<apiServer>");
 
+    // query to default VI
     QueryRequest request =
         new QueryRequest().sql(new QueryRequestSql().query("SELECT * FROM \"_events\" LIMIT 10"));
 
@@ -16,5 +20,25 @@ public static void main(String[] args) {
     } catch (Exception e) {
       e.printStackTrace();
     }
+
+    // query to a specific VI
+    try {
+      QueryResponse response = rs.virtualInstances.query("vi-id", request);
+      System.out.println(response);
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
+
+    // send query lamdba to a specific VI
+    QueryParameter exParam = new QueryParameter();
+    exParam.setName("param");
+    exParam.setType("string");
+    exParam.setValue("All work and no play makes Jack a dull boy");
+    ExecuteQueryLambdaRequest exReq = new ExecuteQueryLambdaRequest();
+    exReq.addParametersItem(exParam);
+    exReq.setVirtualInstanceId("vi-id");
+    QueryResponse qr = rs.queryLambdas.execute("commons", "ql-name", "production", exReq);
+    Map<String, String> result = (LinkedTreeMap) qr.getResults().get(0);
+    System.out.println(result.toString());
   }
 }