add mem-leak api

shipping/src/main/java/com/instana/robotshop/shipping/Controller.java

@@ -2,6 +2,7 @@ package com.instana.robotshop.shipping;
 
 import java.util.List;
 import java.util.Map;
+import java.util.Arrays;
 import java.util.ArrayList;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -22,6 +23,8 @@ public class Controller {
 
     private String CART_URL = String.format("http://%s/shipping/", getenv("CART_ENDPOINT", "cart"));
 
+    public static ArrayList bytesGlobal = new ArrayList<byte[]>();
+
     @Autowired
     private CityRepository cityrepo;
 
@@ -35,6 +38,14 @@ public class Controller {
         return val;
     }
 
+    @GetMapping(path = "/memory")
+    public int memory() {
+        byte[] bytes = new byte[1024 * 1024 * 25];
+        Arrays.fill(bytes,(byte)8);
+        bytesGlobal.add(bytes);
+        return bytesGlobal.size();
+    }
+
     @GetMapping("/health")
     public String health() {
         return "OK";