Extend capability of distributed cache

- Extend cache configs to be able to work in stanalone mode as well as
  in cluster mode in kubernetes.
- Expose the parameters to enable or disable the feature.
- to make it work in standalone mode autodiscovery config will take care , and
  to run it on kubernetes enable the kubernetes option and provide the
  service name property.

Issue-ID: CPS-1637
Change-Id: I704c4aa11e65b17b5be80048e4246079014d8bb7
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>

3 files changed, 53 insertions, 2 deletions

diff --git a/cps-service/src/main/java/org/onap/cps/cache/AnchorDataCacheConfig.java b/cps-service/src/main/java/org/onap/cps/cache/AnchorDataCacheConfig.java
index 54d6ff395..3acba0bb3 100644
--- a/cps-service/src/main/java/org/onap/cps/cache/AnchorDataCacheConfig.java
+++ b/cps-service/src/main/java/org/onap/cps/cache/AnchorDataCacheConfig.java
@@ -1,6 +1,6 @@
 /*
  * ============LICENSE_START========================================================
- *  Copyright (C) 2022 Nordix Foundation
+ *  Copyright (C) 2022-2023 Nordix Foundation
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -26,15 +26,24 @@ import com.hazelcast.config.NamedConfig;
 import com.hazelcast.core.Hazelcast;
 import com.hazelcast.core.HazelcastInstance;
 import com.hazelcast.map.IMap;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
 /**
  * Core infrastructure of the hazelcast distributed cache for anchor data config use cases.
  */
+@Slf4j
 @Configuration
 public class AnchorDataCacheConfig {
 
+    @Value("${hazelcast.mode.kubernetes.enabled}")
+    private boolean cacheKubernetesEnabled;
+
+    @Value("${hazelcast.mode.kubernetes.service-name}")
+    private String cacheKubernetesServiceName;
+
     private static final MapConfig anchorDataCacheMapConfig = createMapConfig("anchorDataCacheMapConfig");
 
     /**
@@ -57,6 +66,7 @@ public class AnchorDataCacheConfig {
         final Config config = new Config(instanceName);
         config.addMapConfig((MapConfig) namedConfig);
         config.setClusterName("cps-service-caches");
+        updateDiscoveryMode(config);
         return config;
     }
 
@@ -67,4 +77,12 @@ public class AnchorDataCacheConfig {
         return mapConfig;
     }
 
+    private void updateDiscoveryMode(final Config config) {
+        if (cacheKubernetesEnabled) {
+            log.info("Enabling kubernetes mode with service-name : {}", cacheKubernetesServiceName);
+            config.getNetworkConfig().getJoin().getKubernetesConfig().setEnabled(true)
+                    .setProperty("service-name", cacheKubernetesServiceName);
+        }
+    }
+
 }
diff --git a/cps-service/src/test/groovy/org/onap/cps/cache/AnchorDataCacheConfigSpec.groovy b/cps-service/src/test/groovy/org/onap/cps/cache/AnchorDataCacheConfigSpec.groovy
index 839444b68..76b534553 100644
--- a/cps-service/src/test/groovy/org/onap/cps/cache/AnchorDataCacheConfigSpec.groovy
+++ b/cps-service/src/test/groovy/org/onap/cps/cache/AnchorDataCacheConfigSpec.groovy
@@ -1,6 +1,6 @@
 /*
  *  ============LICENSE_START=======================================================
- *  Copyright (C) 2022 Nordix Foundation
+ *  Copyright (C) 2022-2023 Nordix Foundation
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -19,6 +19,8 @@
  */
 
 package org.onap.cps.cache
+
+import com.hazelcast.config.Config
 import com.hazelcast.core.Hazelcast
 import com.hazelcast.map.IMap
 import org.springframework.beans.factory.annotation.Autowired
@@ -49,4 +51,28 @@ class AnchorDataCacheConfigSpec extends Specification {
             assert anchorDataCacheConfig.backupCount == 3
             assert anchorDataCacheConfig.asyncBackupCount == 3
     }
+
+    def 'Verify deployment network configs for Distributed Caches'() {
+        given: 'the Anchor Data Cache config'
+            def anchorDataCacheNetworkConfig = Hazelcast.getHazelcastInstanceByName('hazelCastInstanceCpsCore').config.networkConfig
+        expect: 'system created instance with correct config'
+            assert anchorDataCacheNetworkConfig.join.autoDetectionConfig.enabled
+            assert !anchorDataCacheNetworkConfig.join.kubernetesConfig.enabled
+    }
+
+    def 'Verify network config'() {
+        given: 'Synchronization config object and test configuration'
+            def objectUnderTest = new AnchorDataCacheConfig()
+            def testConfig = new Config()
+        when: 'kubernetes properties are enabled'
+            objectUnderTest.cacheKubernetesEnabled = true
+            objectUnderTest.cacheKubernetesServiceName = 'test-service-name'
+        and: 'method called to update the discovery mode'
+            objectUnderTest.updateDiscoveryMode(testConfig)
+        then: 'applied properties are reflected'
+            assert testConfig.networkConfig.join.kubernetesConfig.enabled
+            assert testConfig.networkConfig.join.kubernetesConfig.properties.get('service-name') == 'test-service-name'
+
+    }
+
 }
diff --git a/cps-service/src/test/resources/application.yml b/cps-service/src/test/resources/application.yml
index 04295eb74..21f374533 100644
--- a/cps-service/src/test/resources/application.yml
+++ b/cps-service/src/test/resources/application.yml
@@ -48,3 +48,10 @@ spring:
 logging:
   level:
     org.apache.kafka: ERROR
+
+# Custom Hazelcast Config.
+hazelcast:
+  mode:
+    kubernetes:
+      enabled: false
+      service-name: "cps-and-ncmp-service"