Improve serialization speeds

.github/workflows/ci.yml

@@ -108,6 +108,24 @@ jobs:
         arguments: |
           integrationTest -Dbuild.snapshot=false
 
+  backward-compatibility-build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-java@v3
+        with:
+          distribution: temurin # Temurin is a distribution of adoptium
+          java-version: 17
+
+      - name: Checkout Security Repo
+        uses: actions/checkout@v4
+
+      - name: Build BWC tests
+        uses: gradle/gradle-build-action@v2
+        with:
+          cache-disabled: true
+          arguments: |
+            -p bwc-test build -x test -x integTest
+
   backward-compatibility:
     strategy:
       fail-fast: false

bwc-test/build.gradle

@@ -47,6 +47,7 @@ buildscript {
         opensearch_version = System.getProperty("opensearch.version", "3.0.0-SNAPSHOT")
         opensearch_group = "org.opensearch"
         common_utils_version = System.getProperty("common_utils.version", '2.9.0.0-SNAPSHOT')
+        jackson_version = System.getProperty("jackson_version", "2.15.2")
     }
     repositories {
         mavenLocal()
@@ -72,6 +73,9 @@ dependencies {
     testImplementation "org.opensearch.test:framework:${opensearch_version}"
     testImplementation "org.apache.logging.log4j:log4j-core:${versions.log4j}"
     testImplementation "org.opensearch:common-utils:${common_utils_version}"
+    testImplementation "com.fasterxml.jackson.core:jackson-databind:${jackson_version}"
+    testImplementation "com.fasterxml.jackson.core:jackson-annotations:${jackson_version}"
+
 }
 
 loggerUsageCheck.enabled = false

bwc-test/src/test/java/org/opensearch/security/bwc/ClusterType.java

@@ -0,0 +1,28 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.security.bwc;
+
+public enum ClusterType {
+    OLD,
+    MIXED,
+    UPGRADED;
+
+    public static ClusterType parse(String value) {
+        switch (value) {
+            case "old_cluster":
+                return OLD;
+            case "mixed_cluster":
+                return MIXED;
+            case "upgraded_cluster":
+                return UPGRADED;
+            default:
+                throw new AssertionError("unknown cluster type: " + value);
+        }
+    }
+}