Make policy participant interact with Policy API

Change the policy participant from interacting directly with
the database, into participant interacting with policy API instead

Issue-ID: POLICY-3330
Change-Id: I02420b1e43f1b18e337b00ebd300f03bb9b7412d
Signed-off-by: ERIMROB <robertas.rimkus@est.tech>

5 files changed, 176 insertions, 30 deletions

diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/client/AbstractHttpClient.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/client/AbstractHttpClient.java
new file mode 100644
index 000000000..4b6686156
--- /dev/null
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/client/AbstractHttpClient.java
@@ -0,0 +1,75 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.controlloop.participant.policy.client;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.Collections;
+import java.util.Map;
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.core.HttpHeaders;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
+import org.onap.policy.common.endpoints.http.client.HttpClient;
+import org.onap.policy.common.endpoints.http.client.HttpClientFactoryInstance;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public abstract class AbstractHttpClient implements Closeable {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(AbstractHttpClient.class);
+    private final HttpClient httpclient;
+
+
+    /**
+     * Constructor.
+     */
+    protected AbstractHttpClient(BusTopicParams policyApiParameters) {
+        try {
+            httpclient = HttpClientFactoryInstance.getClientFactory().build(policyApiParameters);
+        } catch (final Exception e) {
+            throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR, " Client failed to start", e);
+        }
+    }
+
+    protected Response executePost(String path, final Entity<?> entity) {
+        Response response = httpclient.post(path, entity, Map.of(HttpHeaders.ACCEPT,
+                MediaType.APPLICATION_JSON, HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON));
+        if (response.getStatus() / 100 != 2) {
+            LOGGER.error(
+                    "Invocation of path {} failed for entity {}. Response status: {}, Response status info: {}",
+                    path, entity, response.getStatus(), response.getStatusInfo());
+        }
+        return response;
+    }
+
+    protected Response executeDelete(String path) {
+        return httpclient.delete(path, Collections.emptyMap());
+    }
+
+    @Override
+    public void close() throws IOException {
+        httpclient.shutdown();
+    }
+}
\ No newline at end of file
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/client/PolicyApiHttpClient.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/client/PolicyApiHttpClient.java
new file mode 100644
index 000000000..3d1047ce4
--- /dev/null
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/client/PolicyApiHttpClient.java
@@ -0,0 +1,84 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.controlloop.participant.policy.client;
+
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameters;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
+import org.springframework.stereotype.Component;
+
+@Component
+public class PolicyApiHttpClient extends AbstractHttpClient {
+
+    private static final String POLICY_URI = "/policy/api/v1/";
+
+    /**
+     * Constructor.
+     */
+    public PolicyApiHttpClient(ParticipantPolicyParameters parameters) {
+        super(parameters.getPolicyApiParameters());
+    }
+
+    /**
+     * Create Policy Types.
+     *
+     * @param toscaServiceTemplate the whole ToscaServiceTemplate
+     * @return Response
+     */
+    public Response createPolicyType(ToscaServiceTemplate toscaServiceTemplate) throws PfModelException {
+        return executePost(POLICY_URI + "policytypes", Entity.entity(toscaServiceTemplate, MediaType.APPLICATION_JSON));
+    }
+
+    /**
+     * Create Policies.
+     *
+     * @param toscaServiceTemplate the whole ToscaServiceTemplate
+     * @return Response
+     */
+    public Response createPolicy(final ToscaServiceTemplate toscaServiceTemplate) {
+        return executePost(POLICY_URI + "policies", Entity.entity(toscaServiceTemplate, MediaType.APPLICATION_JSON));
+    }
+
+    /**
+     * Delete Policies.
+     *
+     * @param policyName the name of the policy to be deleted
+     * @param policyVersion the version of the policy to be deleted
+     * @return Response
+     */
+    public Response deletePolicy(final String policyName, final String policyVersion) {
+        return executeDelete(POLICY_URI + "policies/" + policyName + "/versions/" + policyVersion);
+    }
+
+    /**
+     * Delete Policy types.
+     *
+     * @param policyTypeName the name of the policy to be deleted
+     * @param policyTypeVersion the version of the policy to be deleted
+     * @return Response
+     */
+    public Response deletePolicyType(final String policyTypeName, final String policyTypeVersion) {
+        return executeDelete(POLICY_URI + "policytypes/" + policyTypeName + "/versions/" + policyTypeVersion);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/config/ParticipantConfig.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/config/ParticipantConfig.java
index afef1a5d2..3b8324151 100644
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/config/ParticipantConfig.java
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/config/ParticipantConfig.java
@@ -24,9 +24,6 @@ import org.onap.policy.clamp.controlloop.participant.intermediary.api.Participan
 import org.onap.policy.clamp.controlloop.participant.intermediary.api.ParticipantIntermediaryFactory;
 import org.onap.policy.clamp.controlloop.participant.policy.main.handler.ControlLoopElementHandler;
 import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameters;
-import org.onap.policy.models.base.PfModelException;
-import org.onap.policy.models.provider.PolicyModelsProvider;
-import org.onap.policy.models.provider.PolicyModelsProviderFactory;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
@@ -49,17 +46,4 @@ public class ParticipantConfig {
         controlLoopElementHandler.setIntermediaryApi(intermediaryApi);
         return intermediaryApi;
     }
-
-    /**
-     * Create PolicyModelsProvider.
-     *
-     * @param parameters the Participant Policy Parameters
-     * @return PolicyModelsProvider
-     * @throws PfModelException in case of an exception
-     */
-    @Bean
-    public PolicyModelsProvider databaseProvider(ParticipantPolicyParameters parameters) throws PfModelException {
-        return new PolicyModelsProviderFactory().createPolicyModelsProvider(parameters.getDatabaseProviderParameters());
-    }
-
 }
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/ControlLoopElementHandler.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/ControlLoopElementHandler.java
index 5b07568da..1b176f076 100644
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/ControlLoopElementHandler.java
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/ControlLoopElementHandler.java
@@ -32,9 +32,9 @@ import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoop
 import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopState;
 import org.onap.policy.clamp.controlloop.participant.intermediary.api.ControlLoopElementListener;
 import org.onap.policy.clamp.controlloop.participant.intermediary.api.ParticipantIntermediaryApi;
+import org.onap.policy.clamp.controlloop.participant.policy.client.PolicyApiHttpClient;
 import org.onap.policy.models.base.PfModelException;
 import org.onap.policy.models.base.PfModelRuntimeException;
-import org.onap.policy.models.provider.PolicyModelsProvider;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyType;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
@@ -52,7 +52,7 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
     private final Map<String, String> policyTypeMap = new LinkedHashMap<>();
     private final Map<String, String> policyMap = new LinkedHashMap<>();
 
-    private final PolicyModelsProvider databaseProvider;
+    private final PolicyApiHttpClient apiHttpClient;
 
     @Setter
     private ParticipantIntermediaryApi intermediaryApi;
@@ -60,10 +60,10 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
     /**
      * constructor.
      *
-     * @param databaseProvider the Policy Models Provider
+     * @param apiHttpClient the Policy Api Http Client
      */
-    public ControlLoopElementHandler(PolicyModelsProvider databaseProvider) {
-        this.databaseProvider = databaseProvider;
+    public ControlLoopElementHandler(PolicyApiHttpClient apiHttpClient) {
+        this.apiHttpClient = apiHttpClient;
     }
 
     /**
@@ -82,7 +82,7 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
                 try {
                     deletePolicyData(controlLoopElementId, newState);
                 } catch (PfModelRuntimeException e) {
-                    LOGGER.debug("Delete policytpes failed", e);
+                    LOGGER.debug("Deleting policy data failed", e);
                 }
                 break;
             case PASSIVE:
@@ -100,12 +100,12 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
     private void deletePolicyData(UUID controlLoopElementId, ControlLoopOrderedState newState) throws PfModelException {
         // Delete all policies of this controlLoop from policy framework
         for (Entry<String, String> policy : policyMap.entrySet()) {
-            databaseProvider.deletePolicy(policy.getKey(), policy.getValue());
+            apiHttpClient.deletePolicy(policy.getKey(), policy.getValue());
         }
         policyMap.clear();
         // Delete all policy types of this control loop from policy framework
         for (Entry<String, String> policyType : policyTypeMap.entrySet()) {
-            databaseProvider.deletePolicyType(policyType.getKey(), policyType.getValue());
+            apiHttpClient.deletePolicyType(policyType.getKey(), policyType.getValue());
         }
         policyTypeMap.clear();
         intermediaryApi.updateControlLoopElementState(controlLoopElementId, newState, ControlLoopState.UNINITIALISED);
@@ -127,17 +127,20 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
             for (ToscaPolicyType policyType : controlLoopDefinition.getPolicyTypes().values()) {
                 policyTypeMap.put(policyType.getName(), policyType.getVersion());
             }
-            databaseProvider.createPolicyTypes(controlLoopDefinition);
+            LOGGER.debug("Found Policy Types in control loop definition: {} , Creating Policy Types",
+                    controlLoopDefinition.getName());
+            apiHttpClient.createPolicyType(controlLoopDefinition);
         }
         if (controlLoopDefinition.getToscaTopologyTemplate().getPolicies() != null) {
             for (Map<String, ToscaPolicy> foundPolicyMap : controlLoopDefinition.getToscaTopologyTemplate()
                     .getPolicies()) {
-                for (Entry<String, ToscaPolicy> policyEntry : foundPolicyMap.entrySet()) {
-                    ToscaPolicy policy = policyEntry.getValue();
+                for (ToscaPolicy policy : foundPolicyMap.values()) {
                     policyMap.put(policy.getName(), policy.getVersion());
                 }
             }
-            databaseProvider.createPolicies(controlLoopDefinition);
+            LOGGER.debug("Found Policies in control loop definition: {} , Creating Policies",
+                    controlLoopDefinition.getName());
+            apiHttpClient.createPolicy(controlLoopDefinition);
         }
     }
 
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/parameters/ParticipantPolicyParameters.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/parameters/ParticipantPolicyParameters.java
index 13d89faba..490722a45 100644
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/parameters/ParticipantPolicyParameters.java
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/parameters/ParticipantPolicyParameters.java
@@ -23,9 +23,9 @@ package org.onap.policy.clamp.controlloop.participant.policy.main.parameters;
 import javax.validation.constraints.NotBlank;
 import lombok.Getter;
 import org.onap.policy.clamp.controlloop.participant.intermediary.parameters.ParticipantIntermediaryParameters;
+import org.onap.policy.common.endpoints.event.comm.bus.internal.BusTopicParams;
 import org.onap.policy.common.parameters.ParameterGroupImpl;
 import org.onap.policy.common.parameters.annotations.NotNull;
-import org.onap.policy.models.provider.PolicyModelsProviderParameters;
 
 /**
  * Class to hold all parameters needed for the policy participant.
@@ -36,7 +36,7 @@ import org.onap.policy.models.provider.PolicyModelsProviderParameters;
 @Getter
 public class ParticipantPolicyParameters extends ParameterGroupImpl {
     private ParticipantIntermediaryParameters intermediaryParameters;
-    private PolicyModelsProviderParameters databaseProviderParameters;
+    private BusTopicParams policyApiParameters;
 
     /**
      * Create the policy participant parameter group.