Added support for ORAN A1-P Version 2.0

Change-Id: I82a00dced95b76c97bf93c61a65a8c9d8157a00f
Issue-ID: CCSDK-2502
Signed-off-by: PatrikBuhr <patrik.buhr@est.tech>

8 files changed, 308 insertions, 56 deletions

diff --git a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1Client.java b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1Client.java
index 6f1bf357..4321ed48 100644
--- a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1Client.java
+++ b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1Client.java
@@ -36,8 +36,10 @@ public interface A1Client {
     public enum A1ProtocolType {
         UNKNOWN, //
         STD_V1_1, // STD A1 version 1.1
+        STD_V2_0_0, // STD A1 version 2.0.0
         OSC_V1, // OSC 'A1'
         SDNC_OSC_STD_V1_1, // SDNC_OSC with STD A1 version 1.1 southbound
+        SDNC_OSC_STD_V2_0_0, // SDNC_OSC with STD A1 version 2.0.0 southbound
         SDNC_OSC_OSC_V1, // SDNC_OSC with OSC 'A1' southbound
         SDNC_ONAP
     }
@@ -57,4 +59,5 @@ public interface A1Client {
     public Flux<String> deleteAllPolicies();
 
     public Mono<String> getPolicyStatus(Policy policy);
+
 }
diff --git a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1ClientFactory.java b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1ClientFactory.java
index f0f03cfe..66ba60c0 100644
--- a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1ClientFactory.java
+++ b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1ClientFactory.java
@@ -73,10 +73,14 @@ public class A1ClientFactory {
         if (version == A1ProtocolType.STD_V1_1) {
             assertNoControllerConfig(ric, version);
             return new StdA1ClientVersion1(ric.getConfig(), this.restClientFactory);
+        } else if (version == A1ProtocolType.STD_V2_0_0) {
+            assertNoControllerConfig(ric, version);
+            return new StdA1ClientVersion2(ric.getConfig(), this.restClientFactory);
         } else if (version == A1ProtocolType.OSC_V1) {
             assertNoControllerConfig(ric, version);
             return new OscA1Client(ric.getConfig(), this.restClientFactory);
-        } else if (version == A1ProtocolType.SDNC_OSC_STD_V1_1 || version == A1ProtocolType.SDNC_OSC_OSC_V1) {
+        } else if (version == A1ProtocolType.SDNC_OSC_STD_V1_1 || version == A1ProtocolType.SDNC_OSC_OSC_V1
+                || version == A1ProtocolType.SDNC_OSC_STD_V2_0_0) {
             return new SdncOscA1Client(version, ric.getConfig(), getControllerConfig(ric), this.restClientFactory);
         } else if (version == A1ProtocolType.SDNC_ONAP) {
             return new SdncOnapA1Client(ric.getConfig(), getControllerConfig(ric), this.restClientFactory);
@@ -118,7 +122,8 @@ public class A1ClientFactory {
 
     private Mono<A1Client.A1ProtocolType> getProtocolVersion(Ric ric) {
         if (ric.getProtocolVersion() == A1ProtocolType.UNKNOWN) {
-            return fetchVersion(ric, A1ProtocolType.STD_V1_1) //
+            return fetchVersion(ric, A1ProtocolType.STD_V2_0_0) //
+                    .onErrorResume(notUsed -> fetchVersion(ric, A1ProtocolType.STD_V1_1)) //
                     .onErrorResume(notUsed -> fetchVersion(ric, A1ProtocolType.OSC_V1)) //
                     .onErrorResume(notUsed -> fetchVersion(ric, A1ProtocolType.SDNC_OSC_STD_V1_1)) //
                     .onErrorResume(notUsed -> fetchVersion(ric, A1ProtocolType.SDNC_ONAP)) //
diff --git a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1UriBuilder.java b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1UriBuilder.java
index d29226c8..08ea0e8c 100644
--- a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1UriBuilder.java
+++ b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/A1UriBuilder.java
@@ -29,4 +29,10 @@ interface A1UriBuilder {
     String createDeleteUri(String type, String policyId);
 
     String createGetPolicyStatusUri(String type, String policyId);
+
+    String createPolicyTypesUri();
+
+    String createGetPolicyIdsUri(String type);
+
+    String createGetSchemaUri(String type);
 }
diff --git a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/OscA1Client.java b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/OscA1Client.java
index 741ab1b9..3643b8d2 100644
--- a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/OscA1Client.java
+++ b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/OscA1Client.java
@@ -37,7 +37,7 @@ import reactor.core.publisher.Mono;
  */
 @SuppressWarnings("squid:S2629") // Invoke method(s) only conditionally
 public class OscA1Client implements A1Client {
-    static final int CONCURRENCY_RIC = 1; // How may paralell requests that is sent to one NearRT RIC
+    static final int CONCURRENCY_RIC = 1; // How many paralell requests that is sent to one NearRT RIC
 
     public static class UriBuilder implements A1UriBuilder {
         private final RicConfig ricConfig;
@@ -54,6 +54,7 @@ public class OscA1Client implements A1Client {
         /**
          * /a1-p/policytypes/{policy_type_id}/policies
          */
+        @Override
         public String createGetPolicyIdsUri(String type) {
             return createPolicyTypeUri(type) + "/policies";
         }
@@ -81,6 +82,7 @@ public class OscA1Client implements A1Client {
         /**
          * /a1-p/policytypes/{policy_type_id}
          */
+        @Override
         public String createGetSchemaUri(String type) {
             return this.createPolicyTypeUri(type);
         }
@@ -88,6 +90,7 @@ public class OscA1Client implements A1Client {
         /**
          * ​/a1-p​/policytypes​/{policy_type_id}
          */
+        @Override
         public String createPolicyTypesUri() {
             return baseUri() + "/policytypes";
         }
diff --git a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/SdncOscA1Client.java b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/SdncOscA1Client.java
index 3ba2ba7b..28c27843 100644
--- a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/SdncOscA1Client.java
+++ b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/SdncOscA1Client.java
@@ -48,7 +48,7 @@ import reactor.core.publisher.Mono;
 @SuppressWarnings("squid:S2629") // Invoke method(s) only conditionally
 public class SdncOscA1Client implements A1Client {
 
-    static final int CONCURRENCY_RIC = 1; // How may paralell requests that is sent to one NearRT RIC
+    static final int CONCURRENCY_RIC = 1; // How many paralell requests that is sent to one NearRT RIC
 
     @Value.Immutable
     @org.immutables.gson.Gson.TypeAdapters
@@ -81,7 +81,8 @@ public class SdncOscA1Client implements A1Client {
      * Constructor that creates the REST client to use.
      *
      * @param protocolType the southbound protocol of the controller. Supported
-     *        protocols are SDNC_OSC_STD_V1_1 and SDNC_OSC_OSC_V1
+     *        protocols are SDNC_OSC_STD_V1_1, SDNC_OSC_OSC_V1 and
+     *        SDNC_OSC_STD_V2_0_0 with
      * @param ricConfig the configuration of the Near-RT RIC to communicate
      *        with
      * @param controllerConfig the configuration of the SDNC controller to use
@@ -92,32 +93,35 @@ public class SdncOscA1Client implements A1Client {
             AsyncRestClientFactory restClientFactory) {
         this(protocolType, ricConfig, controllerConfig,
                 restClientFactory.createRestClient(controllerConfig.baseUrl() + "/restconf/operations"));
-        logger.debug("SdncOscA1Client for ric: {}, a1Controller: {}", ricConfig.ricId(), controllerConfig);
     }
 
     /**
      * Constructor where the REST client to use is provided.
      *
      * @param protocolType the southbound protocol of the controller. Supported
-     *        protocols are SDNC_OSC_STD_V1_1 and SDNC_OSC_OSC_V1
+     *        protocols are SDNC_OSC_STD_V1_1, SDNC_OSC_OSC_V1 and
+     *        SDNC_OSC_STD_V2_0_0 with
      * @param ricConfig the configuration of the Near-RT RIC to communicate
      *        with
      * @param controllerConfig the configuration of the SDNC controller to use
      * @param restClient the REST client to use
      *
-     * @throws IllegalArgumentException when the protocolType is wrong.
+     * @throws IllegalArgumentException when the protocolType is illegal.
      */
     public SdncOscA1Client(A1ProtocolType protocolType, RicConfig ricConfig, ControllerConfig controllerConfig,
             AsyncRestClient restClient) {
-        if (!(A1ProtocolType.SDNC_OSC_STD_V1_1.equals(protocolType)
-                || A1ProtocolType.SDNC_OSC_OSC_V1.equals(protocolType))) {
-            throw new IllegalArgumentException("Protocol type must be " + A1ProtocolType.SDNC_OSC_STD_V1_1 + " or "
-                    + A1ProtocolType.SDNC_OSC_OSC_V1 + ", was: " + protocolType);
+        if (A1ProtocolType.SDNC_OSC_STD_V1_1.equals(protocolType) //
+                || A1ProtocolType.SDNC_OSC_OSC_V1.equals(protocolType) //
+                || A1ProtocolType.SDNC_OSC_STD_V2_0_0.equals(protocolType)) {
+            this.restClient = restClient;
+            this.ricConfig = ricConfig;
+            this.protocolType = protocolType;
+            this.controllerConfig = controllerConfig;
+            logger.debug("SdncOscA1Client for ric: {}, a1Controller: {}", ricConfig.ricId(), controllerConfig);
+        } else {
+            throw new IllegalArgumentException("Not handeled protocolversion: " + protocolType);
         }
-        this.restClient = restClient;
-        this.ricConfig = ricConfig;
-        this.protocolType = protocolType;
-        this.controllerConfig = controllerConfig;
+
     }
 
     @Override
@@ -125,9 +129,7 @@ public class SdncOscA1Client implements A1Client {
         if (this.protocolType == A1ProtocolType.SDNC_OSC_STD_V1_1) {
             return Mono.just(Arrays.asList(""));
         } else {
-            OscA1Client.UriBuilder uri = new OscA1Client.UriBuilder(ricConfig);
-            final String ricUrl = uri.createPolicyTypesUri();
-            return post(GET_POLICY_RPC, ricUrl, Optional.empty()) //
+            return post(GET_POLICY_RPC, getUriBuilder().createPolicyTypesUri(), Optional.empty()) //
                     .flatMapMany(SdncJsonHelper::parseJsonArrayOfString) //
                     .collectList();
         }
@@ -145,20 +147,27 @@ public class SdncOscA1Client implements A1Client {
         if (this.protocolType == A1ProtocolType.SDNC_OSC_STD_V1_1) {
             return Mono.just("{}");
         } else {
-            OscA1Client.UriBuilder uri = new OscA1Client.UriBuilder(ricConfig);
+            A1UriBuilder uri = this.getUriBuilder();
             final String ricUrl = uri.createGetSchemaUri(policyTypeId);
             return post(GET_POLICY_RPC, ricUrl, Optional.empty()) //
-                    .flatMap(response -> OscA1Client.extractCreateSchema(response, policyTypeId));
+                    .flatMap(response -> extractCreateSchema(response, policyTypeId));
+        }
+    }
+
+    private Mono<String> extractCreateSchema(String controllerResponse, String policyTypeId) {
+        if (this.protocolType == A1ProtocolType.SDNC_OSC_OSC_V1) {
+            return OscA1Client.extractCreateSchema(controllerResponse, policyTypeId);
+        } else if (this.protocolType == A1ProtocolType.SDNC_OSC_STD_V2_0_0) {
+            return StdA1ClientVersion2.extractPolicySchema(controllerResponse, policyTypeId);
+        } else {
+            throw new NullPointerException("Not supported");
         }
     }
 
     @Override
     public Mono<String> putPolicy(Policy policy) {
-        return getUriBuilder() //
-                .flatMap(builder -> {
-                    String ricUrl = builder.createPutPolicyUri(policy.type().id(), policy.id());
-                    return post("putA1Policy", ricUrl, Optional.of(policy.json()));
-                });
+        String ricUrl = getUriBuilder().createPutPolicyUri(policy.type().id(), policy.id());
+        return post("putA1Policy", ricUrl, Optional.of(policy.json()));
     }
 
     @Override
@@ -172,44 +181,46 @@ public class SdncOscA1Client implements A1Client {
             return getPolicyIds() //
                     .flatMap(policyId -> deletePolicyById("", policyId), CONCURRENCY_RIC); //
         } else {
-            OscA1Client.UriBuilder uriBuilder = new OscA1Client.UriBuilder(ricConfig);
+            A1UriBuilder uriBuilder = this.getUriBuilder();
             return getPolicyTypeIdentities() //
                     .flatMapMany(Flux::fromIterable) //
-                    .flatMap(type -> oscDeleteInstancesForType(uriBuilder, type), CONCURRENCY_RIC);
+                    .flatMap(type -> deleteAllInstancesForType(uriBuilder, type), CONCURRENCY_RIC);
         }
     }
 
-    private Flux<String> oscGetInstancesForType(OscA1Client.UriBuilder uriBuilder, String type) {
+    private Flux<String> getInstancesForType(A1UriBuilder uriBuilder, String type) {
         return post(GET_POLICY_RPC, uriBuilder.createGetPolicyIdsUri(type), Optional.empty()) //
                 .flatMapMany(SdncJsonHelper::parseJsonArrayOfString);
     }
 
-    private Flux<String> oscDeleteInstancesForType(OscA1Client.UriBuilder uriBuilder, String type) {
-        return oscGetInstancesForType(uriBuilder, type) //
+    private Flux<String> deleteAllInstancesForType(A1UriBuilder uriBuilder, String type) {
+        return getInstancesForType(uriBuilder, type) //
                 .flatMap(instance -> deletePolicyById(type, instance), CONCURRENCY_RIC);
     }
 
     @Override
     public Mono<A1ProtocolType> getProtocolVersion() {
-        return tryStdProtocolVersion() //
+        return tryStdProtocolVersion2() //
+                .onErrorResume(t -> tryStdProtocolVersion1()) //
                 .onErrorResume(t -> tryOscProtocolVersion());
     }
 
     @Override
     public Mono<String> getPolicyStatus(Policy policy) {
-        return getUriBuilder() //
-                .flatMap(builder -> {
-                    String ricUrl = builder.createGetPolicyStatusUri(policy.type().id(), policy.id());
-                    return post("getA1PolicyStatus", ricUrl, Optional.empty());
-                });
+        String ricUrl = getUriBuilder().createGetPolicyStatusUri(policy.type().id(), policy.id());
+        return post("getA1PolicyStatus", ricUrl, Optional.empty());
+
     }
 
-    private Mono<A1UriBuilder> getUriBuilder() {
+    private A1UriBuilder getUriBuilder() {
         if (protocolType == A1ProtocolType.SDNC_OSC_STD_V1_1) {
-            return Mono.just(new StdA1ClientVersion1.UriBuilder(ricConfig));
-        } else {
-            return Mono.just(new OscA1Client.UriBuilder(ricConfig));
+            return new StdA1ClientVersion1.UriBuilder(ricConfig);
+        } else if (protocolType == A1ProtocolType.SDNC_OSC_STD_V2_0_0) {
+            return new StdA1ClientVersion2.UriBuilder(ricConfig);
+        } else if (protocolType == A1ProtocolType.SDNC_OSC_OSC_V1) {
+            return new OscA1Client.UriBuilder(ricConfig);
         }
+        throw new NullPointerException();
     }
 
     private Mono<A1ProtocolType> tryOscProtocolVersion() {
@@ -218,20 +229,26 @@ public class SdncOscA1Client implements A1Client {
                 .flatMap(x -> Mono.just(A1ProtocolType.SDNC_OSC_OSC_V1));
     }
 
-    private Mono<A1ProtocolType> tryStdProtocolVersion() {
+    private Mono<A1ProtocolType> tryStdProtocolVersion1() {
         StdA1ClientVersion1.UriBuilder uriBuilder = new StdA1ClientVersion1.UriBuilder(ricConfig);
-        return post(GET_POLICY_RPC, uriBuilder.createGetPolicyIdsUri(), Optional.empty()) //
+        return post(GET_POLICY_RPC, uriBuilder.createGetPolicyIdsUri(""), Optional.empty()) //
                 .flatMap(x -> Mono.just(A1ProtocolType.SDNC_OSC_STD_V1_1));
     }
 
+    private Mono<A1ProtocolType> tryStdProtocolVersion2() {
+        StdA1ClientVersion2.UriBuilder uriBuilder = new StdA1ClientVersion2.UriBuilder(ricConfig);
+        return post(GET_POLICY_RPC, uriBuilder.createPolicyTypesUri(), Optional.empty()) //
+                .flatMap(x -> Mono.just(A1ProtocolType.SDNC_OSC_STD_V2_0_0));
+    }
+
     private Flux<String> getPolicyIds() {
         if (this.protocolType == A1ProtocolType.SDNC_OSC_STD_V1_1) {
             StdA1ClientVersion1.UriBuilder uri = new StdA1ClientVersion1.UriBuilder(ricConfig);
-            final String ricUrl = uri.createGetPolicyIdsUri();
+            final String ricUrl = uri.createGetPolicyIdsUri("");
             return post(GET_POLICY_RPC, ricUrl, Optional.empty()) //
                     .flatMapMany(SdncJsonHelper::parseJsonArrayOfString);
         } else {
-            OscA1Client.UriBuilder uri = new OscA1Client.UriBuilder(ricConfig);
+            A1UriBuilder uri = this.getUriBuilder();
             return getPolicyTypeIdentities() //
                     .flatMapMany(Flux::fromIterable)
                     .flatMap(type -> post(GET_POLICY_RPC, uri.createGetPolicyIdsUri(type), Optional.empty())) //
@@ -240,11 +257,8 @@ public class SdncOscA1Client implements A1Client {
     }
 
     private Mono<String> deletePolicyById(String type, String policyId) {
-        return getUriBuilder() //
-                .flatMap(builder -> {
-                    String ricUrl = builder.createDeleteUri(type, policyId);
-                    return post("deleteA1Policy", ricUrl, Optional.empty());
-                });
+        String ricUrl = getUriBuilder().createDeleteUri(type, policyId);
+        return post("deleteA1Policy", ricUrl, Optional.empty());
     }
 
     private Mono<String> post(String rpcName, String ricUrl, Optional<String> body) {
@@ -270,8 +284,9 @@ public class SdncOscA1Client implements A1Client {
         } else {
             logger.debug("Error response: {} {}", output.httpStatus(), body);
             byte[] responseBodyBytes = body.getBytes(StandardCharsets.UTF_8);
-            WebClientResponseException responseException = new WebClientResponseException(output.httpStatus(),
-                    "statusText", null, responseBodyBytes, StandardCharsets.UTF_8, null);
+            HttpStatus httpStatus = HttpStatus.valueOf(output.httpStatus());
+            WebClientResponseException responseException = new WebClientResponseException(httpStatus.value(),
+                    httpStatus.getReasonPhrase(), null, responseBodyBytes, StandardCharsets.UTF_8, null);
 
             return Mono.error(responseException);
         }
diff --git a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/StdA1ClientVersion1.java b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/StdA1ClientVersion1.java
index d094e7a1..94567234 100644
--- a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/StdA1ClientVersion1.java
+++ b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/StdA1ClientVersion1.java
@@ -53,7 +53,8 @@ public class StdA1ClientVersion1 implements A1Client {
         /**
          * /A1-P/v1/policies
          */
-        public String createGetPolicyIdsUri() {
+        @Override
+        public String createGetPolicyIdsUri(String type) {
             return baseUri() + "/policies";
         }
 
@@ -68,6 +69,7 @@ public class StdA1ClientVersion1 implements A1Client {
         /**
          * /A1-P/v1/policies/{policyId}/status
          */
+        @Override
         public String createGetPolicyStatusUri(String type, String policyId) {
             return policiesBaseUri() + policyId + "/status";
         }
@@ -77,7 +79,17 @@ public class StdA1ClientVersion1 implements A1Client {
         }
 
         private String policiesBaseUri() {
-            return createGetPolicyIdsUri() + "/";
+            return createGetPolicyIdsUri("") + "/";
+        }
+
+        @Override
+        public String createPolicyTypesUri() {
+            throw new NullPointerException("Not supported URI");
+        }
+
+        @Override
+        public String createGetSchemaUri(String type) {
+            throw new NullPointerException("Not supported URI");
         }
     }
 
@@ -137,7 +149,7 @@ public class StdA1ClientVersion1 implements A1Client {
     }
 
     private Flux<String> getPolicyIds() {
-        return restClient.get(uri.createGetPolicyIdsUri()) //
+        return restClient.get(uri.createGetPolicyIdsUri("")) //
                 .flatMapMany(SdncJsonHelper::parseJsonArrayOfString);
     }
 
diff --git a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/StdA1ClientVersion2.java b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/StdA1ClientVersion2.java
new file mode 100644
index 00000000..c475b22f
--- /dev/null
+++ b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/clients/StdA1ClientVersion2.java
@@ -0,0 +1,208 @@
+/*-
+ * ========================LICENSE_START=================================
+ * ONAP : ccsdk oran
+ * ======================================================================
+ * Copyright (C) 2020 Nordix Foundation. All rights reserved.
+ * ======================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ========================LICENSE_END===================================
+ */
+
+package org.onap.ccsdk.oran.a1policymanagementservice.clients;
+
+import java.lang.invoke.MethodHandles;
+import java.util.List;
+
+import org.json.JSONObject;
+import org.onap.ccsdk.oran.a1policymanagementservice.configuration.RicConfig;
+import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policy;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+/**
+ * Client for accessing ORAN A1-P Vesion 2.0 REST API
+ */
+@SuppressWarnings("squid:S2629") // Invoke method(s) only conditionally
+public class StdA1ClientVersion2 implements A1Client {
+    static final int CONCURRENCY_RIC = 1; // How many paralell requests that is sent to one NearRT RIC
+
+    public static class UriBuilder implements A1UriBuilder {
+        private final RicConfig ricConfig;
+
+        public UriBuilder(RicConfig ricConfig) {
+            this.ricConfig = ricConfig;
+        }
+
+        @Override
+        public String createPutPolicyUri(String type, String policyId) {
+            return createPolicyUri(type, policyId);
+        }
+
+        /**
+         * /A1-P/v2​/policytypes/{policy_type_id}/policies
+         */
+        @Override
+        public String createGetPolicyIdsUri(String type) {
+            return createPolicyTypeUri(type) + "/policies";
+        }
+
+        @Override
+        public String createDeleteUri(String type, String policyId) {
+            return createPolicyUri(type, policyId);
+        }
+
+        /**
+         * ​/A1-P/v2​/policytypes​/{policy_type_id}​/policies​/{policy_instance_id}​/status
+         */
+        @Override
+        public String createGetPolicyStatusUri(String type, String policyId) {
+            return createPolicyUri(type, policyId) + "/status";
+        }
+
+        /**
+         * /A1-P/v2/policytypes/{policy_type_id}
+         */
+        @Override
+        public String createGetSchemaUri(String type) {
+            return this.createPolicyTypeUri(type);
+        }
+
+        /**
+         * ​/A1-P/v2​/policytypes​/{policy_type_id}
+         */
+        @Override
+        public String createPolicyTypesUri() {
+            return baseUri() + "/policytypes";
+        }
+
+        /**
+         * ​/A1-P/v2​/policytypes​/{policy_type_id}​/policies​/{policy_instance_id}
+         */
+        private String createPolicyUri(String type, String id) {
+            return createPolicyTypeUri(type) + "/policies/" + id;
+        }
+
+        /**
+         * /A1-P/v2/policytypes/{policy_type_id}
+         */
+        private String createPolicyTypeUri(String type) {
+            return createPolicyTypesUri() + "/" + type;
+        }
+
+        private String baseUri() {
+            return ricConfig.baseUrl() + "/A1-P/v2";
+        }
+    }
+
+    private static final String TITLE = "title";
+    private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+    private final AsyncRestClient restClient;
+    private final UriBuilder uriBuiler;
+
+    public StdA1ClientVersion2(RicConfig ricConfig, AsyncRestClientFactory restClientFactory) {
+        this(ricConfig, restClientFactory.createRestClient(""));
+    }
+
+    public StdA1ClientVersion2(RicConfig ricConfig, AsyncRestClient restClient) {
+        this.restClient = restClient;
+        logger.debug("OscA1Client for ric: {}", ricConfig.ricId());
+
+        uriBuiler = new UriBuilder(ricConfig);
+    }
+
+    public static Mono<String> extractPolicySchema(String policyTypeResponse, String policyTypeId) {
+        try {
+            JSONObject obj = new JSONObject(policyTypeResponse);
+            JSONObject schemaObj = obj.getJSONObject("policySchema");
+            schemaObj.put(TITLE, policyTypeId);
+            return Mono.just(schemaObj.toString());
+        } catch (Exception e) {
+            String exceptionString = e.toString();
+            logger.error("Unexpected response for policy type: {}, exception: {}", policyTypeResponse, exceptionString);
+            return Mono.error(e);
+        }
+    }
+
+    @Override
+    public Mono<List<String>> getPolicyTypeIdentities() {
+        return getPolicyTypeIds() //
+                .collectList();
+    }
+
+    @Override
+    public Mono<List<String>> getPolicyIdentities() {
+        return getPolicyTypeIds() //
+                .flatMap(this::getPolicyIdentitiesByType) //
+                .collectList();
+    }
+
+    @Override
+    public Mono<String> getPolicyTypeSchema(String policyTypeId) {
+        String schemaUri = uriBuiler.createGetSchemaUri(policyTypeId);
+        return restClient.get(schemaUri) //
+                .flatMap(response -> extractPolicySchema(response, policyTypeId));
+    }
+
+    @Override
+    public Mono<String> putPolicy(Policy policy) {
+        String policyUri = this.uriBuiler.createPutPolicyUri(policy.type().id(), policy.id());
+        return restClient.put(policyUri, policy.json());
+    }
+
+    @Override
+    public Mono<String> deletePolicy(Policy policy) {
+        return deletePolicyById(policy.type().id(), policy.id());
+    }
+
+    @Override
+    public Mono<A1ProtocolType> getProtocolVersion() {
+        return restClient.get(uriBuiler.createPolicyTypesUri()) //
+                .flatMap(notUsed -> Mono.just(A1ProtocolType.STD_V2_0_0));
+    }
+
+    @Override
+    public Flux<String> deleteAllPolicies() {
+        return getPolicyTypeIds() //
+                .flatMap(this::deletePoliciesForType, CONCURRENCY_RIC);
+    }
+
+    @Override
+    public Mono<String> getPolicyStatus(Policy policy) {
+        String statusUri = uriBuiler.createGetPolicyStatusUri(policy.type().id(), policy.id());
+        return restClient.get(statusUri);
+
+    }
+
+    private Flux<String> getPolicyTypeIds() {
+        return restClient.get(uriBuiler.createPolicyTypesUri()) //
+                .flatMapMany(SdncJsonHelper::parseJsonArrayOfString);
+    }
+
+    private Flux<String> getPolicyIdentitiesByType(String typeId) {
+        return restClient.get(uriBuiler.createGetPolicyIdsUri(typeId)) //
+                .flatMapMany(SdncJsonHelper::parseJsonArrayOfString);
+    }
+
+    private Mono<String> deletePolicyById(String typeId, String policyId) {
+        String policyUri = uriBuiler.createDeleteUri(typeId, policyId);
+        return restClient.delete(policyUri);
+    }
+
+    private Flux<String> deletePoliciesForType(String typeId) {
+        return getPolicyIdentitiesByType(typeId) //
+                .flatMap(policyId -> deletePolicyById(typeId, policyId), CONCURRENCY_RIC);
+    }
+}
diff --git a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/tasks/RicSynchronizationTask.java b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/tasks/RicSynchronizationTask.java
index cf7ca74e..88d99232 100644
--- a/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/tasks/RicSynchronizationTask.java
+++ b/a1-policy-management/src/main/java/org/onap/ccsdk/oran/a1policymanagementservice/tasks/RicSynchronizationTask.java
@@ -59,7 +59,7 @@ import reactor.core.publisher.SignalType;
 public class RicSynchronizationTask {
 
     private static final Logger logger = LoggerFactory.getLogger(RicSynchronizationTask.class);
-    static final int CONCURRENCY_RIC = 1; // How may paralell requests that is sent to one NearRT RIC
+    static final int CONCURRENCY_RIC = 1; // How many paralell requests that is sent to one NearRT RIC
 
     private final A1ClientFactory a1ClientFactory;
     private final PolicyTypes policyTypes;