Convert Policy Participant to SpringBoot Application

Issue-ID: POLICY-3245
Change-Id: Iadacaba3b2a30c67adbe77b8b17debce2f2abb39
Signed-off-by: FrancescoFioraEst <francesco.fiora@est.tech>

11 files changed, 206 insertions, 561 deletions

diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/PolicyParticipantApplication.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/PolicyParticipantApplication.java
new file mode 100644
index 000000000..bdc09c8b9
--- /dev/null
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/PolicyParticipantApplication.java
@@ -0,0 +1,41 @@
+/*-
+ * ============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;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.ConfigurationPropertiesScan;
+import org.springframework.context.annotation.ComponentScan;
+
+/**
+ * Starter.
+ *
+ */
+@SpringBootApplication
+@ComponentScan({"org.onap.policy.clamp.controlloop.participant.policy",
+        "org.onap.policy.clamp.controlloop.participant.intermediary"})
+@ConfigurationPropertiesScan("org.onap.policy.clamp.controlloop.participant.policy.main.parameters")
+public class PolicyParticipantApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(PolicyParticipantApplication.class, args);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/config/ParametersConfig.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/config/ParametersConfig.java
new file mode 100644
index 000000000..9c65d029c
--- /dev/null
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/config/ParametersConfig.java
@@ -0,0 +1,40 @@
+/*-
+ * ============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.config;
+
+import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
+import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameterHandler;
+import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameters;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class ParametersConfig {
+
+    @Value("${participant.file}")
+    private String file;
+
+    @Bean
+    public ParticipantPolicyParameters participantPolicyParameters() throws ControlLoopException {
+        return new ParticipantPolicyParameterHandler().toParticipantDcaeParameters(file);
+    }
+}
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
new file mode 100644
index 000000000..afef1a5d2
--- /dev/null
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/config/ParticipantConfig.java
@@ -0,0 +1,65 @@
+/*-
+ * ============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.config;
+
+import org.onap.policy.clamp.controlloop.participant.intermediary.api.ParticipantIntermediaryApi;
+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;
+
+@Configuration
+public class ParticipantConfig {
+
+    /**
+     * Create ParticipantIntermediaryApi.
+     *
+     * @param parameters the Participant Policy Parameters
+     * @param controlLoopElementHandler the ControlLoop Element Handler
+     * @return ParticipantIntermediaryApi
+     */
+    @Bean
+    public ParticipantIntermediaryApi participantIntermediaryApi(ParticipantPolicyParameters parameters,
+            ControlLoopElementHandler controlLoopElementHandler) {
+        ParticipantIntermediaryApi intermediaryApi = new ParticipantIntermediaryFactory().createApiImplementation();
+        intermediaryApi.init(parameters.getIntermediaryParameters());
+        intermediaryApi.registerControlLoopElementListener(controlLoopElementHandler);
+        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 932ebbece..5b07568da 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
@@ -25,11 +25,13 @@ import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.UUID;
+import lombok.Setter;
 import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ClElementStatistics;
 import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopElement;
 import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoopOrderedState;
 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.models.base.PfModelException;
 import org.onap.policy.models.base.PfModelRuntimeException;
 import org.onap.policy.models.provider.PolicyModelsProvider;
@@ -38,15 +40,31 @@ import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyType;
 import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
 
 /**
  * This class handles implementation of controlLoopElement updates.
  */
+@Component
 public class ControlLoopElementHandler implements ControlLoopElementListener {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(ControlLoopElementHandler.class);
-    private static final Map<String, String> policyTypeMap = new LinkedHashMap<>();
-    private static final Map<String, String> policyMap = new LinkedHashMap<>();
+    private final Map<String, String> policyTypeMap = new LinkedHashMap<>();
+    private final Map<String, String> policyMap = new LinkedHashMap<>();
+
+    private final PolicyModelsProvider databaseProvider;
+
+    @Setter
+    private ParticipantIntermediaryApi intermediaryApi;
+
+    /**
+     * constructor.
+     *
+     * @param databaseProvider the Policy Models Provider
+     */
+    public ControlLoopElementHandler(PolicyModelsProvider databaseProvider) {
+        this.databaseProvider = databaseProvider;
+    }
 
     /**
      * Callback method to handle a control loop element state change.
@@ -55,12 +73,10 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
      * @param currentState the current state of the control loop element
      * @param newState the state to which the control loop element is changing to
      * @throws PfModelException in case of an exception
-    */
+     */
     @Override
-    public void controlLoopElementStateChange(UUID controlLoopElementId,
-            ControlLoopState currentState,
+    public void controlLoopElementStateChange(UUID controlLoopElementId, ControlLoopState currentState,
             ControlLoopOrderedState newState) throws PfModelException {
-        PolicyProvider policyProvider = PolicyHandler.getInstance().getPolicyProvider();
         switch (newState) {
             case UNINITIALISED:
                 try {
@@ -70,14 +86,10 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
                 }
                 break;
             case PASSIVE:
-                policyProvider.getIntermediaryApi()
-                    .updateControlLoopElementState(controlLoopElementId, newState,
-                            ControlLoopState.PASSIVE);
+                intermediaryApi.updateControlLoopElementState(controlLoopElementId, newState, ControlLoopState.PASSIVE);
                 break;
             case RUNNING:
-                policyProvider.getIntermediaryApi()
-                    .updateControlLoopElementState(controlLoopElementId, newState,
-                            ControlLoopState.RUNNING);
+                intermediaryApi.updateControlLoopElementState(controlLoopElementId, newState, ControlLoopState.RUNNING);
                 break;
             default:
                 LOGGER.debug("Unknown orderedstate {}", newState);
@@ -85,25 +97,18 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
         }
     }
 
-    private void deletePolicyData(UUID controlLoopElementId,
-            ControlLoopOrderedState newState) throws PfModelException {
-        PolicyModelsProvider dbProvider = PolicyHandler.getInstance().getDatabaseProvider();
-        PolicyProvider policyProvider = PolicyHandler.getInstance().getPolicyProvider();
-        if (policyMap != null) {
-            // Delete all policies of this controlLoop from policy framework
-            for (Entry<String, String> policy : policyMap.entrySet()) {
-                dbProvider.deletePolicy(policy.getKey(), policy.getValue());
-            }
+    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());
         }
-        if (policyTypeMap != null) {
-            // Delete all policy types of this control loop from policy framework
-            for (Entry<String, String> policy : policyTypeMap.entrySet()) {
-                dbProvider.deletePolicyType(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());
         }
-        policyProvider.getIntermediaryApi()
-            .updateControlLoopElementState(controlLoopElementId, newState,
-                    ControlLoopState.UNINITIALISED);
+        policyTypeMap.clear();
+        intermediaryApi.updateControlLoopElementState(controlLoopElementId, newState, ControlLoopState.UNINITIALISED);
     }
 
     /**
@@ -114,27 +119,25 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
      * @throws PfModelException in case of an exception
      */
     @Override
-    public void controlLoopElementUpdate(ControlLoopElement element,
-            ToscaServiceTemplate controlLoopDefinition) throws PfModelException {
-        PolicyModelsProvider dbProvider = PolicyHandler.getInstance().getDatabaseProvider();
-        PolicyProvider policyProvider = PolicyHandler.getInstance().getPolicyProvider();
-
-        policyProvider.getIntermediaryApi()
-            .updateControlLoopElementState(element.getId(), element.getOrderedState(), ControlLoopState.PASSIVE);
+    public void controlLoopElementUpdate(ControlLoopElement element, ToscaServiceTemplate controlLoopDefinition)
+            throws PfModelException {
+        intermediaryApi.updateControlLoopElementState(element.getId(), element.getOrderedState(),
+                ControlLoopState.PASSIVE);
         if (controlLoopDefinition.getPolicyTypes() != null) {
             for (ToscaPolicyType policyType : controlLoopDefinition.getPolicyTypes().values()) {
                 policyTypeMap.put(policyType.getName(), policyType.getVersion());
             }
-            dbProvider.createPolicyTypes(controlLoopDefinition);
+            databaseProvider.createPolicyTypes(controlLoopDefinition);
         }
         if (controlLoopDefinition.getToscaTopologyTemplate().getPolicies() != null) {
-            for (Map<String, ToscaPolicy> foundPolicyMap : controlLoopDefinition
-                            .getToscaTopologyTemplate().getPolicies()) {
-                for (ToscaPolicy policy : foundPolicyMap.values()) {
+            for (Map<String, ToscaPolicy> foundPolicyMap : controlLoopDefinition.getToscaTopologyTemplate()
+                    .getPolicies()) {
+                for (Entry<String, ToscaPolicy> policyEntry : foundPolicyMap.entrySet()) {
+                    ToscaPolicy policy = policyEntry.getValue();
                     policyMap.put(policy.getName(), policy.getVersion());
                 }
             }
-            dbProvider.createPolicies(controlLoopDefinition);
+            databaseProvider.createPolicies(controlLoopDefinition);
         }
     }
 
@@ -144,16 +147,13 @@ public class ControlLoopElementHandler implements ControlLoopElementListener {
      * @param controlLoopElementId controlloop element id
      */
     @Override
-    public void handleStatistics(UUID controlLoopElementId) {
-        PolicyProvider policyProvider = PolicyHandler.getInstance().getPolicyProvider();
-        ControlLoopElement clElement = policyProvider.getIntermediaryApi()
-               .getControlLoopElement(controlLoopElementId);
+    public void handleStatistics(UUID controlLoopElementId) throws PfModelException {
+        ControlLoopElement clElement = intermediaryApi.getControlLoopElement(controlLoopElementId);
         if (clElement != null) {
             ClElementStatistics clElementStatistics = new ClElementStatistics();
             clElementStatistics.setControlLoopState(clElement.getState());
             clElementStatistics.setTimeStamp(Instant.now());
-            policyProvider.getIntermediaryApi()
-                .updateControlLoopElementStatistics(controlLoopElementId, clElementStatistics);
+            intermediaryApi.updateControlLoopElementStatistics(controlLoopElementId, clElementStatistics);
         }
     }
 }
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/PolicyHandler.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/PolicyHandler.java
deleted file mode 100644
index d62e5f9f3..000000000
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/PolicyHandler.java
+++ /dev/null
@@ -1,100 +0,0 @@
-/*-
- * ============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.main.handler;
-
-import java.io.IOException;
-import java.util.List;
-import java.util.Set;
-import javax.ws.rs.core.Response;
-import lombok.Getter;
-import org.onap.policy.clamp.controlloop.common.handler.ControlLoopHandler;
-import org.onap.policy.clamp.controlloop.participant.intermediary.parameters.ParticipantIntermediaryParameters;
-import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameters;
-import org.onap.policy.common.endpoints.event.comm.TopicSink;
-import org.onap.policy.common.endpoints.listeners.MessageTypeDispatcher;
-import org.onap.policy.common.utils.services.Registry;
-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.provider.PolicyModelsProviderFactory;
-
-/**
- * This class handles policy participant and control loop elements.
- *
- * <p/>It is effectively a singleton that is started at system start.
- */
-public class PolicyHandler extends ControlLoopHandler {
-
-    private final ParticipantIntermediaryParameters participantParameters;
-    private final ParticipantPolicyParameters policyParameters;
-
-    @Getter
-    private PolicyProvider policyProvider;
-    @Getter
-    private PolicyModelsProvider databaseProvider;
-
-    /**
-     * Create a handler.
-     *
-     * @param parameters the parameters for access to the database
-     * @throws PfModelException in case of an exception
-     */
-    public PolicyHandler(ParticipantPolicyParameters parameters) throws PfModelException {
-        super(parameters.getDatabaseProviderParameters());
-        participantParameters = parameters.getIntermediaryParameters();
-        policyParameters = parameters;
-    }
-
-    public static PolicyHandler getInstance() {
-        return Registry.get(PolicyHandler.class.getName());
-    }
-
-    @Override
-    public Set<Class<?>> getProviderClasses() {
-        return null;
-    }
-
-    @Override
-    public void startProviders() {
-        try {
-            policyProvider = new PolicyProvider(participantParameters);
-            databaseProvider = new PolicyModelsProviderFactory().createPolicyModelsProvider(
-                                         policyParameters.getDatabaseProviderParameters());
-        } catch (PfModelException e) {
-            throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, "Start providers failed ", e);
-        }
-    }
-
-    @Override
-    public void stopProviders() {
-        try {
-            policyProvider.close();
-        } catch (IOException e) {
-            throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, "Stop providers failed ", e);
-        }
-
-        try {
-            databaseProvider.close();
-        } catch (PfModelException e) {
-            throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, "Stop providers failed ", e);
-        }
-    }
-}
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/PolicyProvider.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/PolicyProvider.java
deleted file mode 100644
index 420c77ee3..000000000
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/handler/PolicyProvider.java
+++ /dev/null
@@ -1,57 +0,0 @@
-/*-
- * ============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.main.handler;
-
-import java.io.Closeable;
-import java.io.IOException;
-import lombok.Getter;
-import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException;
-import org.onap.policy.clamp.controlloop.participant.intermediary.api.ParticipantIntermediaryApi;
-import org.onap.policy.clamp.controlloop.participant.intermediary.api.ParticipantIntermediaryFactory;
-import org.onap.policy.clamp.controlloop.participant.intermediary.parameters.ParticipantIntermediaryParameters;
-
-/**
- * Provider class for policy participant.
- */
-public class PolicyProvider implements Closeable {
-    @Getter
-    private final ParticipantIntermediaryApi intermediaryApi;
-
-    private final ControlLoopElementHandler controlLoopElementHandler;
-
-    /**
-     * Create a policy participant provider.
-     *
-     * @throws ControlLoopRuntimeException on errors creating the provider
-     */
-    public PolicyProvider(ParticipantIntermediaryParameters participantParameters)
-                     throws ControlLoopRuntimeException {
-        intermediaryApi = new ParticipantIntermediaryFactory().createApiImplementation();
-        intermediaryApi.init(participantParameters);
-        controlLoopElementHandler = new ControlLoopElementHandler();
-        intermediaryApi.registerControlLoopElementListener(controlLoopElementHandler);
-    }
-
-    @Override
-    public void close() throws IOException {
-        intermediaryApi.close();
-    }
-}
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/parameters/ParticipantPolicyParameterHandler.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/parameters/ParticipantPolicyParameterHandler.java
index 98cea821a..0d8e70013 100644
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/parameters/ParticipantPolicyParameterHandler.java
+++ b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/parameters/ParticipantPolicyParameterHandler.java
@@ -23,8 +23,7 @@ package org.onap.policy.clamp.controlloop.participant.policy.main.parameters;
 import java.io.File;
 import javax.ws.rs.core.Response;
 import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
-import org.onap.policy.clamp.controlloop.participant.policy.main.startstop.ParticipantPolicyCommandLineArguments;
-import org.onap.policy.common.parameters.ValidationResult;
+import org.onap.policy.common.parameters.BeanValidationResult;
 import org.onap.policy.common.utils.coder.Coder;
 import org.onap.policy.common.utils.coder.CoderException;
 import org.onap.policy.common.utils.coder.StandardCoder;
@@ -39,37 +38,34 @@ public class ParticipantPolicyParameterHandler {
     /**
      * Read the parameters from the parameter file.
      *
-     * @param arguments the arguments passed to policy
+     * @param path the path passed to policy
      * @return the parameters read from the configuration file
      * @throws ControlLoopException on parameter exceptions
      */
-    public ParticipantPolicyParameters getParameters(final ParticipantPolicyCommandLineArguments arguments)
-            throws ControlLoopException {
+    public ParticipantPolicyParameters toParticipantDcaeParameters(final String path) throws ControlLoopException {
         ParticipantPolicyParameters parameters = null;
 
         // Read the parameters
         try {
             // Read the parameters from JSON
-            File file = new File(arguments.getFullConfigurationFilePath());
+            File file = new File(path);
             parameters = CODER.decode(file, ParticipantPolicyParameters.class);
         } catch (final CoderException e) {
-            final String errorMessage = "error reading parameters from \"" + arguments.getConfigurationFilePath()
-                    + "\"\n" + "(" + e.getClass().getSimpleName() + ")";
+            final String errorMessage =
+                    "error reading parameters from \"" + path + "\"\n" + "(" + e.getClass().getSimpleName() + ")";
             throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage, e);
         }
 
         // The JSON processing returns null if there is an empty file
         if (parameters == null) {
-            final String errorMessage = "no parameters found in \"" + arguments.getConfigurationFilePath() + "\"";
-            throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, errorMessage);
+            throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, "no parameters found in \"" + path + "\"");
         }
 
         // validate the parameters
-        final ValidationResult validationResult = parameters.validate();
+        final BeanValidationResult validationResult = parameters.validate();
         if (!validationResult.isValid()) {
-            String returnMessage =
-                    "validation error(s) on parameters from \"" + arguments.getConfigurationFilePath() + "\"\n";
-            returnMessage += validationResult.getResult();
+            final String returnMessage =
+                    "validation error(s) on parameters from \"" + path + "\"\n" + validationResult.getResult();
 
             throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, returnMessage);
         }
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/startstop/Main.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/startstop/Main.java
deleted file mode 100644
index 9a6bfdf7d..000000000
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/startstop/Main.java
+++ /dev/null
@@ -1,141 +0,0 @@
-/*-
- * ============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.main.startstop;
-
-import java.util.Arrays;
-import javax.ws.rs.core.Response;
-import lombok.Getter;
-import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
-import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException;
-import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameterHandler;
-import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameters;
-import org.onap.policy.common.utils.resources.MessageConstants;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * This class initiates Policy Participant.
- */
-public class Main {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
-
-    private ParticipantPolicyActivator activator;
-
-    @Getter
-    private ParticipantPolicyParameters parameterGroup;
-
-    /**
-     * Instantiates policy participant.
-     *
-     * @param args the command line arguments
-     */
-    public Main(final String[] args) {
-        final String argumentString = Arrays.toString(args);
-        LOGGER.info("Starting the control loop participant service with arguments - {}", argumentString);
-
-        // Check the arguments
-        final ParticipantPolicyCommandLineArguments arguments = new ParticipantPolicyCommandLineArguments();
-        try {
-            // The arguments return a string if there is a message to print and we should exit
-            final String argumentMessage = arguments.parse(args);
-            if (argumentMessage != null) {
-                LOGGER.info(argumentMessage);
-                return;
-            }
-            // Validate that the arguments are sane
-            arguments.validate();
-
-            // Read the parameters
-            parameterGroup = new ParticipantPolicyParameterHandler().getParameters(arguments);
-
-            // Now, create the activator for the service
-            activator = new ParticipantPolicyActivator(parameterGroup);
-
-            // Start the activator
-            activator.start();
-        } catch (Exception exp) {
-            throw new ControlLoopRuntimeException(Response.Status.BAD_REQUEST,
-                String.format(MessageConstants.START_FAILURE_MSG, MessageConstants.POLICY_CLAMP), exp);
-        }
-
-        // Add a shutdown hook to shut everything down in an orderly manner
-        Runtime.getRuntime().addShutdownHook(new ClRuntimeShutdownHookClass());
-        String successMsg = String.format(MessageConstants.START_SUCCESS_MSG, MessageConstants.POLICY_CLAMP);
-        LOGGER.info(successMsg);
-    }
-
-    /**
-     * Check if main is running.
-     */
-    public boolean isRunning() {
-        return activator != null && activator.isAlive();
-    }
-
-    /**
-     * Shut down Execution.
-     *
-     * @throws ControlLoopException on shutdown errors
-     */
-    public void shutdown() throws ControlLoopException {
-        // clear the parameterGroup variable
-        parameterGroup = null;
-
-        // clear the cl participant activator
-        if (activator != null) {
-            activator.stop();
-        }
-    }
-
-    /**
-     * The Class ClRuntimeShutdownHookClass terminates the policy participant
-     * when its run method is called.
-     */
-    private class ClRuntimeShutdownHookClass extends Thread {
-        /*
-         * (non-Javadoc)
-         *
-         * @see java.lang.Runnable#run()
-         */
-        @Override
-        public void run() {
-            try {
-                // Shutdown the control loop participant service and wait for everything to stop
-                shutdown();
-            } catch (final RuntimeException | ControlLoopException e) {
-                LOGGER.warn("error occured during shut down of the policy participant", e);
-            }
-        }
-    }
-
-    /**
-     * The main method.
-     *
-     * @param args the arguments
-     */
-    public static void main(final String[] args) {      // NOSONAR
-        /*
-         * NOTE: arguments are validated by the constructor, thus sonar is disabled.
-         */
-
-        new Main(args);
-    }
-}
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/startstop/ParticipantPolicyActivator.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/startstop/ParticipantPolicyActivator.java
deleted file mode 100644
index 760f8267d..000000000
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/startstop/ParticipantPolicyActivator.java
+++ /dev/null
@@ -1,57 +0,0 @@
-/*-
- * ============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.main.startstop;
-
-import java.util.concurrent.atomic.AtomicReference;
-import lombok.Getter;
-import org.onap.policy.clamp.controlloop.participant.policy.main.handler.PolicyHandler;
-import org.onap.policy.clamp.controlloop.participant.policy.main.parameters.ParticipantPolicyParameters;
-import org.onap.policy.common.utils.services.ServiceManagerContainer;
-
-/**
- * This class activates the policy participant.
- *
- */
-public class ParticipantPolicyActivator extends ServiceManagerContainer {
-    @Getter
-    private final ParticipantPolicyParameters parameters;
-
-    /**
-     * Instantiate the activator for the policy participant.
-     *
-     * @param parameters the parameters for the policy participant
-     */
-    public ParticipantPolicyActivator(final ParticipantPolicyParameters parameters) {
-        this.parameters = parameters;
-
-        final AtomicReference<PolicyHandler> policyHandler = new AtomicReference<>();
-
-        // @formatter:off
-        addAction("Policy Handler",
-            () -> policyHandler.set(new PolicyHandler(parameters)),
-            () -> policyHandler.get().close());
-
-        addAction("Policy Providers",
-            () -> policyHandler.get().startProviders(),
-            () -> policyHandler.get().stopProviders());
-        // @formatter:on
-    }
-}
diff --git a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/startstop/ParticipantPolicyCommandLineArguments.java b/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/startstop/ParticipantPolicyCommandLineArguments.java
deleted file mode 100644
index af7a189f6..000000000
--- a/participant/participant-impl/participant-impl-policy/src/main/java/org/onap/policy/clamp/controlloop/participant/policy/main/startstop/ParticipantPolicyCommandLineArguments.java
+++ /dev/null
@@ -1,145 +0,0 @@
-/*-
- * ============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.main.startstop;
-
-import java.util.Arrays;
-import javax.ws.rs.core.Response;
-import lombok.Getter;
-import lombok.Setter;
-import org.apache.commons.cli.CommandLine;
-import org.apache.commons.cli.DefaultParser;
-import org.apache.commons.cli.Options;
-import org.apache.commons.cli.ParseException;
-import org.apache.commons.lang3.StringUtils;
-import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
-import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException;
-import org.onap.policy.clamp.controlloop.common.startstop.CommonCommandLineArguments;
-import org.onap.policy.common.utils.resources.ResourceUtils;
-
-/**
- * This class reads and handles command line parameters for the policy participant.
- *
- */
-public class ParticipantPolicyCommandLineArguments {
-    private static final String FILE_MESSAGE_PREAMBLE = " file \"";
-    private static final int HELP_LINE_LENGTH = 120;
-
-    private final Options options;
-    private final CommonCommandLineArguments commonCommandLineArguments;
-
-    @Getter()
-    @Setter()
-    private String configurationFilePath = null;
-
-    /**
-     * Construct the options for the policy participant.
-     */
-    public ParticipantPolicyCommandLineArguments() {
-        options = new Options();
-        commonCommandLineArguments = new CommonCommandLineArguments(options);
-    }
-
-    /**
-     * Construct the options for the CLI editor and parse in the given arguments.
-     *
-     * @param args The command line arguments
-     */
-    public ParticipantPolicyCommandLineArguments(final String[] args) {
-        // Set up the options with the default constructor
-        this();
-
-        // Parse the arguments
-        try {
-            parse(args);
-        } catch (final ControlLoopException e) {
-            throw new ControlLoopRuntimeException(Response.Status.NOT_ACCEPTABLE,
-                    "parse error on policy participant parameters", e);
-        }
-    }
-
-    /**
-     * Parse the command line options.
-     *
-     * @param args The command line arguments
-     * @return a string with a message for help and version, or null if there is no message
-     * @throws ControlLoopException on command argument errors
-     */
-    public String parse(final String[] args) throws ControlLoopException {
-        // Clear all our arguments
-        setConfigurationFilePath(null);
-        CommandLine commandLine = null;
-        try {
-            commandLine = new DefaultParser().parse(options, args);
-        } catch (final ParseException e) {
-            throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE,
-                    "invalid command line arguments specified : " + e.getMessage());
-        }
-
-        // Arguments left over after Commons CLI does its stuff
-        final String[] remainingArgs = commandLine.getArgs();
-
-        if (remainingArgs.length > 0) {
-            throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE,
-                    "too many command line arguments specified : " + Arrays.toString(args));
-        }
-
-        if (commandLine.hasOption('h')) {
-            return commonCommandLineArguments.help(Main.class.getName(), options);
-        }
-
-        if (commandLine.hasOption('v')) {
-            return commonCommandLineArguments.version();
-        }
-
-        if (commandLine.hasOption('c')) {
-            setConfigurationFilePath(commandLine.getOptionValue('c'));
-        }
-
-        return null;
-    }
-
-    /**
-     * Validate the command line options.
-     *
-     * @throws ControlLoopException on command argument validation errors
-     */
-    public void validate() throws ControlLoopException {
-        commonCommandLineArguments.validate(configurationFilePath);
-    }
-
-    /**
-     * Gets the full expanded configuration file path.
-     *
-     * @return the configuration file path
-     */
-    public String getFullConfigurationFilePath() {
-        return ResourceUtils.getFilePath4Resource(getConfigurationFilePath());
-    }
-
-    /**
-     * Check set configuration file path.
-     *
-     * @return true, if check set configuration file path
-     */
-    public boolean checkSetConfigurationFilePath() {
-        return !StringUtils.isEmpty(configurationFilePath);
-    }
-}
diff --git a/participant/participant-impl/participant-impl-policy/src/main/resources/config/application.yaml b/participant/participant-impl/participant-impl-policy/src/main/resources/config/application.yaml
new file mode 100644
index 000000000..79eca8f92
--- /dev/null
+++ b/participant/participant-impl/participant-impl-policy/src/main/resources/config/application.yaml
@@ -0,0 +1,3 @@
+
+participant:
+  file: src/main/resources/config/PolicyParticipantConfig.json