From 91af49f5ee0daf950407b8fe392bc52ed0275fb1 Mon Sep 17 00:00:00 2001
From: Harald Musum <musum@yahooinc.com>
Date: Thu, 16 Sep 2021 09:08:30 +0200
Subject: Test with xxhash64 as well

---
 .../com/yahoo/vespa/config/util/ConfigUtils.java   | 47 +++++++++-------------
 1 file changed, 19 insertions(+), 28 deletions(-)

(limited to 'config/src/main/java/com/yahoo')

diff --git a/config/src/main/java/com/yahoo/vespa/config/util/ConfigUtils.java b/config/src/main/java/com/yahoo/vespa/config/util/ConfigUtils.java
index 329661bf7ae..efad076d85c 100644
--- a/config/src/main/java/com/yahoo/vespa/config/util/ConfigUtils.java
+++ b/config/src/main/java/com/yahoo/vespa/config/util/ConfigUtils.java
@@ -1,4 +1,4 @@
-// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.vespa.config.util;
 
 import com.yahoo.collections.Tuple2;
@@ -46,42 +46,18 @@ public class ConfigUtils {
     private static final String doubleFormattedMax = new DecimalFormat("#.#").format(1e308);
     private static final String doubleFormattedMin = new DecimalFormat("#.#", new DecimalFormatSymbols(Locale.ENGLISH)).format(-1e308);
 
-    /**
-     * Computes Md5 hash of a list of strings.
-     *
-     * @param payload a config payload
-     * @return the Md5 hash of the list, with lowercase letters
-     */
     public static String getMd5(ConfigPayload payload) {
-        ByteArrayOutputStream baos = new ByteArrayOutputStream();
-        try {
-            payload.serialize(baos, new JsonFormat(true));
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-        return getMd5(baos.toByteArray());
+        return getMd5(getByteBuffer(payload));
     }
 
-    /**
-     * Computes Md5 hash of a string.
-     *
-     * @param input the input String
-     * @return the Md5 hash of the input, with lowercase letters
-     */
-    public static String getMd5(String input) {
-        return getMd5(input.getBytes(StandardCharsets.UTF_8));
+  public static String getMd5(String input) {
+        return getMd5(ByteBuffer.wrap(input.getBytes(StandardCharsets.UTF_8)));
     }
 
     public static String getMd5(AbstractUtf8Array input) {
         return getMd5(input.wrap());
     }
 
-    public static String getMd5(byte[] input) {
-        MessageDigest md5 = getMd5Instance();
-        md5.update(input);
-        return HexDump.toHexString(md5.digest()).toLowerCase();
-    }
-
     public static String getMd5(ByteBuffer input) {
         MessageDigest md5 = getMd5Instance();
         md5.update(input);
@@ -105,6 +81,21 @@ public class ConfigUtils {
         return Long.toHexString(hasher.hash(input, 0)).toLowerCase();
     }
 
+    public static String getXxhash64(ConfigPayload payload) {
+        return getXxhash64(getByteBuffer(payload));
+    }
+
+    private static ByteBuffer getByteBuffer(ConfigPayload payload) {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        try {
+            payload.serialize(baos, new JsonFormat(true));
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+        return ByteBuffer.wrap(baos.toByteArray());
+    }
+
+
     /**
      * Replaces sequences of spaces with 1 space, unless inside quotes. Public for testing;
      *
-- 
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