Transfer tosca-poc onto master

This is the third if three commits, this commit makes the content of
the master branch the same as the tosca-poc branch.

This commit adds the "src" files for TOSCA control loops to the modules
in master.

Difference between this commit and the current master:
------------------------------------------------------
diff -qr clamp clamp-master |diff_filter.sh
Only in clamp/common: src
Only in clamp/models: src
Files clamp/participant/participant-impl/participant-impl-dcae/pom.xml and clamp-master/participant/participant-impl/participant-impl-dcae/pom.xml differ
Only in clamp/participant/participant-impl/participant-impl-dcae: src
Only in clamp/participant/participant-impl/participant-impl-policy: src
Only in clamp/participant/participant-impl/participant-impl-simulator: src
Files clamp/participant/participant-impl/pom.xml and clamp-master/participant/participant-impl/pom.xml differ
Only in clamp/participant/participant-intermediary: src
Files clamp/participant/pom.xml and clamp-master/participant/pom.xml differ
Files clamp/pom.xml and clamp-master/pom.xml differ
Files clamp/runtime/pom.xml and clamp-master/runtime/pom.xml differ
Only in clamp: runtime-controlloop

Difference between this commit and the current tosca-poc branch:
----------------------------------------------------------------
diff -qr clamp clamp-tp |diff_filter.sh
Files clamp/INFO.yaml and clamp-tp/INFO.yaml differ
Only in clamp/releases: 6.0.1-container.yaml
Only in clamp/releases: 6.0.1.yaml
Only in clamp/releases: 6.0.2-container.yaml
Only in clamp/releases: 6.0.2.yaml
Only in clamp/releases: 6.1.0-container.yaml
Only in clamp/releases: 6.1.0.yaml
Only in clamp/releases: 6.1.1-container.yaml
Only in clamp/releases: 6.1.1.yaml
Files clamp/runtime/src/main/resources/META-INF/resources/swagger.html and clamp-tp/runtime/src/main/resources/META-INF/resources/swagger.html differ

Issue-ID: POLICY-3215
Change-Id: Ica1aa3fe5d6110df2396ea856703102e800fa770
Signed-off-by: liamfallon <liam.fallon@est.tech>

14 files changed, 1388 insertions, 0 deletions

diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/httpclient/AbstractHttpClient.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/httpclient/AbstractHttpClient.java
new file mode 100644
index 000000000..b2d0b61d0
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/httpclient/AbstractHttpClient.java
@@ -0,0 +1,154 @@
+/*-
+ * ============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.dcae.httpclient;
+
+import java.io.Closeable;
+import java.io.IOException;
+import javax.ws.rs.core.Response.Status;
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpHost;
+import org.apache.http.HttpRequest;
+import org.apache.http.ParseException;
+import org.apache.http.auth.AuthScope;
+import org.apache.http.auth.UsernamePasswordCredentials;
+import org.apache.http.client.AuthCache;
+import org.apache.http.client.CredentialsProvider;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.client.methods.HttpPut;
+import org.apache.http.client.protocol.HttpClientContext;
+import org.apache.http.conn.ssl.NoopHostnameVerifier;
+import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
+import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
+import org.apache.http.impl.auth.BasicScheme;
+import org.apache.http.impl.client.BasicAuthCache;
+import org.apache.http.impl.client.BasicCredentialsProvider;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.ssl.SSLContextBuilder;
+import org.apache.http.util.EntityUtils;
+import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException;
+import org.onap.policy.clamp.controlloop.participant.dcae.model.Loop;
+import org.onap.policy.common.endpoints.parameters.RestServerParameters;
+import org.onap.policy.common.utils.coder.Coder;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+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 HttpClientContext localContext;
+    private final CloseableHttpClient httpclient;
+    private final HttpHost target;
+    public static final Coder CODER = new StandardCoder();
+
+    /**
+     * Constructor.
+     */
+    protected AbstractHttpClient(RestServerParameters restServerParameters) {
+        try {
+            final String scheme = restServerParameters.isHttps() ? "https" : "http";
+            target = new HttpHost(restServerParameters.getHost(), restServerParameters.getPort(), scheme);
+
+            CredentialsProvider credsProvider = new BasicCredentialsProvider();
+            credsProvider.setCredentials(new AuthScope(target.getHostName(), target.getPort()),
+                    new UsernamePasswordCredentials(restServerParameters.getUserName(),
+                            restServerParameters.getPassword()));
+
+            AuthCache authCache = new BasicAuthCache();
+            BasicScheme basicAuth = new BasicScheme();
+            authCache.put(target, basicAuth);
+            localContext = HttpClientContext.create();
+            localContext.setAuthCache(authCache);
+
+            HttpClientBuilder builder = HttpClients.custom().setDefaultCredentialsProvider(credsProvider);
+            if (restServerParameters.isHttps()) {
+                final SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(new SSLContextBuilder()
+                        .loadTrustMaterial(null, new TrustSelfSignedStrategy()).setProtocol("TLSv1.2").build(),
+                        new NoopHostnameVerifier());
+                builder.setSSLSocketFactory(sslsf);
+            }
+            httpclient = builder.build();
+
+        } catch (final Exception e) {
+            throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR,
+                    restServerParameters.getName() + " Client failed to start", e);
+        }
+    }
+
+    CloseableHttpResponse execute(HttpRequest request) throws IOException {
+        return httpclient.execute(target, request, localContext);
+    }
+
+    protected boolean executePut(String path, int statusCode) {
+        try (CloseableHttpResponse response = execute(new HttpPut(path))) {
+            return response.getStatusLine().getStatusCode() == statusCode;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+
+    protected Loop executePost(String path, int statusCode) {
+        try (CloseableHttpResponse response = execute(new HttpPost(path))) {
+            if (response.getStatusLine().getStatusCode() != statusCode) {
+                return null;
+            }
+            return entityToMap(response.getEntity());
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    protected Loop executeGet(String path, int statusCode) {
+        try (CloseableHttpResponse response = execute(new HttpGet(path))) {
+            if (response.getStatusLine().getStatusCode() != statusCode) {
+                return null;
+            }
+            return entityToMap(response.getEntity());
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    private Loop entityToMap(HttpEntity httpEntity) {
+        if (httpEntity == null) {
+            return new Loop();
+        }
+        try {
+            return CODER.convert(EntityUtils.toString(httpEntity), Loop.class);
+        } catch (ParseException | IOException e) {
+            LOGGER.error("error reading Entity", e);
+            return new Loop();
+        } catch (CoderException e) {
+            LOGGER.error("cannot convert to Loop Object", e);
+            return new Loop();
+        }
+    }
+
+    @Override
+    public void close() throws IOException {
+        httpclient.close();
+    }
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/httpclient/ClampHttpClient.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/httpclient/ClampHttpClient.java
new file mode 100644
index 000000000..eb805054d
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/httpclient/ClampHttpClient.java
@@ -0,0 +1,140 @@
+/*-
+ * ============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.dcae.httpclient;
+
+import org.apache.http.HttpStatus;
+import org.onap.policy.clamp.controlloop.participant.dcae.model.ExternalComponent;
+import org.onap.policy.clamp.controlloop.participant.dcae.model.Loop;
+import org.onap.policy.common.endpoints.parameters.RestServerParameters;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ClampHttpClient extends AbstractHttpClient {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ClampHttpClient.class);
+
+    private static final String STATUS = "/restservices/clds/v2/loop/getstatus/";
+    private static final String CREATE = "/restservices/clds/v2/loop/create/%s?templateName=%s";
+    private static final String UPDATE = "/restservices/clds/v2/loop/updateMicroservicePolicy/";
+    private static final String DEPLOY = "/restservices/clds/v2/loop/deploy/";
+    private static final String STOP = "/restservices/clds/v2/loop/stop/";
+    private static final String DELETE = "/restservices/clds/v2/loop/delete/";
+    private static final String UNDEPLOY = "/restservices/clds/v2/loop/undeploy/";
+    public static final String STATUS_NOT_FOUND = "STATUS_NOT_FOUND";
+    public static final String POLICY_NOT_FOUND = "POLICY_NOT_FOUND";
+
+    /**
+     * Constructor.
+     */
+    public ClampHttpClient(RestServerParameters restServerParameters) {
+        super(restServerParameters);
+    }
+
+    /**
+     * Create.
+     *
+     * @param loopName the loopName
+     * @param templateName the templateName
+     * @return the Loop object or null if error occurred
+     */
+    public Loop create(String loopName, String templateName) {
+        return executePost(String.format(CREATE, loopName, templateName), HttpStatus.SC_OK);
+    }
+
+    /**
+     * Update.
+     *
+     * @param loopName the loopName
+     * @param jsonEntity the Json entity
+     * @return true
+     */
+    public boolean update(String loopName, String jsonEntity) {
+        return executePost(UPDATE + loopName, HttpStatus.SC_OK) != null;
+    }
+
+    /**
+     * Deploy.
+     *
+     * @param loopName the loopName
+     * @return true
+     */
+    public boolean deploy(String loopName) { // DCAE
+        return executePut(DEPLOY + loopName, HttpStatus.SC_ACCEPTED);
+    }
+
+    /**
+     * Get Status.
+     *
+     * @param loopName the loopName
+     * @return the Loop object or null if error occurred
+     */
+    public Loop getstatus(String loopName) {
+        return executeGet(STATUS + loopName, HttpStatus.SC_OK);
+    }
+
+    /**
+     * Undeploy.
+     *
+     * @param loopName the loopName
+     * @return true
+     */
+    public boolean undeploy(String loopName) {
+        return executePut(UNDEPLOY + loopName, HttpStatus.SC_ACCEPTED);
+    }
+
+    /**
+     * Stop.
+     *
+     * @param loopName the loopName
+     * @return true
+     */
+    public boolean stop(String loopName) {
+        return executePut(STOP + loopName, HttpStatus.SC_OK);
+    }
+
+    /**
+     * Delete.
+     *
+     * @param loopName the loopName
+     * @return true
+     */
+    public boolean delete(String loopName) {
+        return executePut(DELETE + loopName, HttpStatus.SC_OK);
+    }
+
+    /**
+     * return status from Loop object.
+     *
+     * @param loop Loop
+     * @return status
+     */
+    public static String getStatusCode(Loop loop) {
+        if (loop == null || loop.getComponents() == null || loop.getComponents().isEmpty()) {
+            return STATUS_NOT_FOUND;
+        }
+        ExternalComponent externalComponent = loop.getComponents().get("DCAE");
+        if (externalComponent == null || externalComponent.getComponentState() == null) {
+            return STATUS_NOT_FOUND;
+        }
+
+        return externalComponent.getComponentState().getStateName();
+    }
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/httpclient/ConsulDcaeHttpClient.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/httpclient/ConsulDcaeHttpClient.java
new file mode 100644
index 000000000..cd84a2feb
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/httpclient/ConsulDcaeHttpClient.java
@@ -0,0 +1,46 @@
+/*-
+ * ============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.dcae.httpclient;
+
+import org.apache.http.HttpStatus;
+import org.onap.policy.common.endpoints.parameters.RestServerParameters;
+
+public class ConsulDcaeHttpClient extends AbstractHttpClient {
+
+    private static final String DEPLOY = "/v1/kv/dcae-pmsh:policy";
+
+    /**
+     * constructor.
+     */
+    public ConsulDcaeHttpClient(RestServerParameters restServerParameters) {
+        super(restServerParameters);
+    }
+
+    /**
+     * call consult.
+     *
+     * @param jsonEntity the Entity
+     * @return true
+     */
+    public boolean deploy(String jsonEntity) {
+        return executePut(DEPLOY + jsonEntity, HttpStatus.SC_ACCEPTED);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/handler/ControlLoopElementHandler.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/handler/ControlLoopElementHandler.java
new file mode 100644
index 000000000..96677f320
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/handler/ControlLoopElementHandler.java
@@ -0,0 +1,197 @@
+/*-
+ * ============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.dcae.main.handler;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.time.Instant;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+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.dcae.httpclient.ClampHttpClient;
+import org.onap.policy.clamp.controlloop.participant.dcae.httpclient.ConsulDcaeHttpClient;
+import org.onap.policy.clamp.controlloop.participant.dcae.model.Loop;
+import org.onap.policy.clamp.controlloop.participant.intermediary.api.ControlLoopElementListener;
+import org.onap.policy.common.endpoints.parameters.RestServerParameters;
+import org.onap.policy.models.base.PfModelException;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaServiceTemplate;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class handles implementation of controlLoopElement updates.
+ */
+public class ControlLoopElementHandler implements ControlLoopElementListener, Closeable {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ControlLoopElementHandler.class);
+    private final ClampHttpClient clampClient;
+    private final ConsulDcaeHttpClient consulClient;
+
+    private static final String LOOP = "pmsh_loop";
+    private static final String TEMPLATE = "LOOP_TEMPLATE_k8s_pmsh";
+
+    private static final String BLUEPRINT_DEPLOYED = "BLUEPRINT_DEPLOYED";
+    private static final String MICROSERVICE_INSTALLED_SUCCESSFULLY = "MICROSERVICE_INSTALLED_SUCCESSFULLY";
+    private static final int CHECK_COUNT = 10;
+
+    private static final String BODY_CONSUL =
+            "{ \"subscription\": { \"subscriptionName\": \"subscriptiona\", \"administrativeState\": \"UNLOCKED\", "
+                    + "\"fileBasedGP\": 15, \"fileLocation\": \"/pm/pm.xml\", \"nfFilter\": "
+                    + "{ \"nfNames\": [ \"^pnf1.*\" ], \"modelInvariantIDs\": "
+                    + "[ \"5845y423-g654-6fju-po78-8n53154532k6\", \"7129e420-d396-4efb-af02-6b83499b12f8\" ], "
+                    + "\"modelVersionIDs\": [ \"e80a6ae3-cafd-4d24-850d-e14c084a5ca9\" ] }, \"measurementGroups\": "
+                    + "[ { \"measurementGroup\": { \"measurementTypes\": [ { \"measurementType\": \"countera\" }, "
+                    + "{ \"measurementType\": \"counterb\" } ], \"managedObjectDNsBasic\": [ { \"DN\": \"dna\" }, "
+                    + "{ \"DN\": \"dnb\" } ] } }, { \"measurementGroup\": { \"measurementTypes\": "
+                    + "[ { \"measurementType\": \"counterc\" }, { \"measurementType\": \"counterd\" } ], "
+                    + "\"managedObjectDNsBasic\": " + "[ { \"DN\": \"dnc\" }, { \"DN\": \"dnd\" } ] } } ] } }";
+
+    /**
+     * Constructor.
+     */
+    public ControlLoopElementHandler(RestServerParameters clampParameters, RestServerParameters consulParameters) {
+        clampClient = new ClampHttpClient(clampParameters);
+        consulClient = new ConsulDcaeHttpClient(consulParameters);
+    }
+
+    /**
+     * Callback method to handle a control loop element state change.
+     *
+     * @param controlLoopElementId the ID of the control loop element
+     * @param currentState the current state of the control loop element
+     * @param newState the state to which the control loop element is changing to
+     */
+    @Override
+    public void controlLoopElementStateChange(UUID controlLoopElementId, ControlLoopState currentState,
+            ControlLoopOrderedState newState) {
+        switch (newState) {
+            case UNINITIALISED:
+                Loop loop = clampClient.getstatus(LOOP);
+                if (loop != null) {
+                    clampClient.undeploy(LOOP);
+                    DcaeHandler.getInstance().getDcaeProvider().getIntermediaryApi()
+                        .updateControlLoopElementState(controlLoopElementId, newState, ControlLoopState.UNINITIALISED);
+                }
+                break;
+            case PASSIVE:
+                DcaeHandler.getInstance().getDcaeProvider().getIntermediaryApi()
+                    .updateControlLoopElementState(controlLoopElementId, newState, ControlLoopState.PASSIVE);
+                break;
+            case RUNNING:
+                DcaeHandler.getInstance().getDcaeProvider().getIntermediaryApi()
+                    .updateControlLoopElementState(controlLoopElementId, newState, ControlLoopState.RUNNING);
+                break;
+            default:
+                LOGGER.debug("Unknown orderedstate {}", newState);
+                break;
+        }
+    }
+
+    private Loop getStatus() throws PfModelException {
+        Loop loop = clampClient.getstatus(LOOP);
+        if (loop == null) {
+            loop = clampClient.create(LOOP, TEMPLATE);
+        }
+        if (loop == null) {
+            throw new PfModelException(null, "");
+        }
+        return loop;
+    }
+
+    private void deploy() throws PfModelException {
+        if (!consulClient.deploy(BODY_CONSUL)) {
+            throw new PfModelException(null, "deploy to consul failed");
+        }
+        if (!clampClient.deploy(LOOP)) {
+            throw new PfModelException(null, "deploy failed");
+        }
+    }
+
+    /**
+     * Callback method to handle an update on a control loop element.
+     *
+     * @param element the information on the control loop element
+     * @param controlLoopDefinition toscaServiceTemplate
+     * @throws PfModelException in case of an exception
+     */
+    @Override
+    public void controlLoopElementUpdate(ControlLoopElement element, ToscaServiceTemplate controlLoopDefinition)
+            throws PfModelException {
+        try {
+            Loop loop = getStatus();
+
+            if (BLUEPRINT_DEPLOYED.equals(ClampHttpClient.getStatusCode(loop))) {
+                deploy();
+                boolean deployedFlag = false;
+                for (int i = 0; i < CHECK_COUNT; i++) {
+                    //sleep 10 seconds
+                    TimeUnit.SECONDS.sleep(CHECK_COUNT);
+                    loop = getStatus();
+                    String status = ClampHttpClient.getStatusCode(loop);
+                    if (MICROSERVICE_INSTALLED_SUCCESSFULLY.equals(status)) {
+                        DcaeHandler.getInstance().getDcaeProvider().getIntermediaryApi()
+                            .updateControlLoopElementState(element.getId(), element.getOrderedState(),
+                                            ControlLoopState.PASSIVE);
+                        deployedFlag = true;
+                        break;
+                    }
+                }
+                if (!deployedFlag) {
+                    LOGGER.warn("DCAE is not deployed properly, ClElement state will be UNINITIALISED2PASSIVE");
+                    DcaeHandler.getInstance().getDcaeProvider().getIntermediaryApi()
+                        .updateControlLoopElementState(element.getId(), element.getOrderedState(),
+                                      ControlLoopState.UNINITIALISED2PASSIVE);
+                }
+            }
+        } catch (PfModelException e) {
+            throw e;
+        } catch (Exception e) {
+            throw new PfModelException(null, e.getMessage(), e);
+        }
+    }
+
+    /**
+     * Handle controlLoopElement statistics.
+     *
+     * @param controlLoopElementId controlloop element id
+     */
+    @Override
+    public void handleStatistics(UUID controlLoopElementId) {
+        ControlLoopElement clElement = DcaeHandler.getInstance().getDcaeProvider()
+                .getIntermediaryApi().getControlLoopElement(controlLoopElementId);
+        if (clElement != null) {
+            ClElementStatistics clElementStatistics = new ClElementStatistics();
+            clElementStatistics.setControlLoopState(clElement.getState());
+            clElementStatistics.setTimeStamp(Instant.now());
+            DcaeHandler.getInstance().getDcaeProvider().getIntermediaryApi()
+                .updateControlLoopElementStatistics(controlLoopElementId, clElementStatistics);
+        }
+    }
+
+    @Override
+    public void close() throws IOException {
+        clampClient.close();
+        consulClient.close();
+    }
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/handler/DcaeHandler.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/handler/DcaeHandler.java
new file mode 100644
index 000000000..1963e38b1
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/handler/DcaeHandler.java
@@ -0,0 +1,82 @@
+/*-
+ * ============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.dcae.main.handler;
+
+import java.io.IOException;
+import java.util.Collections;
+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.dcae.main.parameters.ParticipantDcaeParameters;
+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.PfModelRuntimeException;
+
+/**
+ * This class handles dcae of participants and control loop elements.
+ *
+ * </p>
+ * It is effectively a singleton that is started at system start.
+ */
+public class DcaeHandler extends ControlLoopHandler {
+
+    private final ParticipantDcaeParameters parameters;
+    @Getter
+    private DcaeProvider dcaeProvider;
+
+    /**
+     * Create a handler.
+     *
+     * @param parameters the parameters for access to the database
+     */
+    public DcaeHandler(ParticipantDcaeParameters parameters) {
+        super(parameters.getDatabaseProviderParameters());
+        this.parameters = parameters;
+    }
+
+    public static DcaeHandler getInstance() {
+        return Registry.get(DcaeHandler.class.getName());
+    }
+
+    @Override
+    public Set<Class<?>> getProviderClasses() {
+        return Collections.emptySet();
+    }
+
+    @Override
+    public void startProviders() {
+        dcaeProvider = new DcaeProvider(parameters);
+    }
+
+    @Override
+    public void stopProviders() {
+        try {
+            dcaeProvider.close();
+        } catch (IOException e) {
+            throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, e.getMessage());
+        } finally {
+            dcaeProvider = null;
+        }
+    }
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/handler/DcaeProvider.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/handler/DcaeProvider.java
new file mode 100644
index 000000000..afaf1c754
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/handler/DcaeProvider.java
@@ -0,0 +1,133 @@
+/*-
+ * ============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.dcae.main.handler;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+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.models.controlloop.concepts.ControlLoopElement;
+import org.onap.policy.clamp.controlloop.models.controlloop.concepts.ControlLoops;
+import org.onap.policy.clamp.controlloop.models.controlloop.concepts.Participant;
+import org.onap.policy.clamp.controlloop.models.messages.rest.TypedSimpleResponse;
+import org.onap.policy.clamp.controlloop.participant.dcae.main.parameters.ParticipantDcaeParameters;
+import org.onap.policy.clamp.controlloop.participant.intermediary.api.ParticipantIntermediaryApi;
+import org.onap.policy.clamp.controlloop.participant.intermediary.api.ParticipantIntermediaryFactory;
+
+/**
+ * This provider class dcae of participants and control loop elements.
+ */
+public class DcaeProvider implements Closeable {
+    @Getter
+    private final ParticipantIntermediaryApi intermediaryApi;
+
+    private final ControlLoopElementHandler clElementHandler;
+
+    /**
+     * Create a participant dcae provider.
+     *
+     * @throws ControlLoopRuntimeException on errors creating the provider
+     */
+    public DcaeProvider(ParticipantDcaeParameters parameters) throws ControlLoopRuntimeException {
+        intermediaryApi = new ParticipantIntermediaryFactory().createApiImplementation();
+        intermediaryApi.init(parameters.getIntermediaryParameters());
+        clElementHandler = new ControlLoopElementHandler(parameters.getClampClientParameters(),
+                parameters.getConsulClientParameters());
+        intermediaryApi.registerControlLoopElementListener(clElementHandler);
+    }
+
+    @Override
+    public void close() throws IOException {
+        intermediaryApi.close();
+        clElementHandler.close();
+    }
+
+    /**
+     * Get the control loops.
+     *
+     * @param name the controlLoop, null to get all
+     * @param version the controlLoop, null to get all
+     * @return the control loops
+     * @throws ControlLoopException on errors getting the control loops
+     */
+    public ControlLoops getControlLoops(String name, String version) throws ControlLoopException {
+        return intermediaryApi.getControlLoops(name, version);
+    }
+
+    /**
+     * Get the dcae control loop elements.
+     *
+     * @param name the controlLoopElement, null to get all
+     * @param version the controlLoopElement, null to get all
+     * @return the control loop elements
+     * @throws ControlLoopException on errors getting the control loop elements
+     */
+    public Map<UUID, ControlLoopElement> getControlLoopElements(String name, String version)
+            throws ControlLoopException {
+        return intermediaryApi.getControlLoopElements(name, version);
+    }
+
+    /**
+     * Update the given control loop element in the dcae.
+     *
+     * @param element the control loop element to update
+     * @return response simple response returned
+     * @throws ControlLoopException on errors updating the control loop element
+     */
+    public TypedSimpleResponse<ControlLoopElement> updateControlLoopElement(ControlLoopElement element)
+            throws ControlLoopException {
+        TypedSimpleResponse<ControlLoopElement> response = new TypedSimpleResponse<>();
+        response.setResponse(intermediaryApi.updateControlLoopElementState(element.getId(),
+                element.getOrderedState(), element.getState()));
+        return response;
+    }
+
+    /**
+     * Get the current dcae participants.
+     *
+     * @param name the participant, null to get all
+     * @param version the participant, null to get all
+     * @return the list of participants
+     * @throws ControlLoopException on errors getting the participants
+     */
+    public List<Participant> getParticipants(String name, String version) throws ControlLoopException {
+        return intermediaryApi.getParticipants(name, version);
+    }
+
+    /**
+     * Update a dcae participant.
+     *
+     * @param participant the participant to update
+     * @return TypedSimpleResponse simple response
+     * @throws ControlLoopException on errors updating the participant
+     */
+
+    public TypedSimpleResponse<Participant> updateParticipant(Participant participant) throws ControlLoopException {
+        TypedSimpleResponse<Participant> response = new TypedSimpleResponse<>();
+        response.setResponse(
+                intermediaryApi.updateParticipantState(participant.getDefinition(), participant.getParticipantState()));
+        return response;
+    }
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/parameters/ParticipantDcaeParameterHandler.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/parameters/ParticipantDcaeParameterHandler.java
new file mode 100644
index 000000000..8d9bef98c
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/parameters/ParticipantDcaeParameterHandler.java
@@ -0,0 +1,78 @@
+/*-
+ * ============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.dcae.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.dcae.main.startstop.ParticipantDcaeCommandLineArguments;
+import org.onap.policy.common.parameters.ValidationResult;
+import org.onap.policy.common.utils.coder.Coder;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+
+/**
+ * This class handles reading, parsing and validating of control loop runtime parameters from JSON files.
+ */
+public class ParticipantDcaeParameterHandler {
+
+    private static final Coder CODER = new StandardCoder();
+
+    /**
+     * Read the parameters from the parameter file.
+     *
+     * @param arguments the arguments passed to dcae
+     * @return the parameters read from the configuration file
+     * @throws ControlLoopException on parameter exceptions
+     */
+    public ParticipantDcaeParameters getParameters(final ParticipantDcaeCommandLineArguments arguments)
+            throws ControlLoopException {
+        ParticipantDcaeParameters parameters = null;
+
+        // Read the parameters
+        try {
+            // Read the parameters from JSON
+            File file = new File(arguments.getFullConfigurationFilePath());
+            parameters = CODER.decode(file, ParticipantDcaeParameters.class);
+        } catch (final CoderException e) {
+            final String errorMessage = "error reading parameters from \"" + arguments.getConfigurationFilePath()
+                    + "\"\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);
+        }
+
+        // validate the parameters
+        final ValidationResult validationResult = parameters.validate();
+        if (!validationResult.isValid()) {
+            String returnMessage =
+                    "validation error(s) on parameters from \"" + arguments.getConfigurationFilePath() + "\"\n";
+            returnMessage += validationResult.getResult();
+            throw new ControlLoopException(Response.Status.NOT_ACCEPTABLE, returnMessage);
+        }
+
+        return parameters;
+    }
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/parameters/ParticipantDcaeParameters.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/parameters/ParticipantDcaeParameters.java
new file mode 100644
index 000000000..beb273086
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/parameters/ParticipantDcaeParameters.java
@@ -0,0 +1,93 @@
+/*-
+ * ============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.dcae.main.parameters;
+
+import javax.validation.constraints.NotBlank;
+import lombok.Getter;
+import org.apache.commons.lang3.StringUtils;
+import org.onap.policy.clamp.controlloop.participant.intermediary.parameters.ParticipantIntermediaryParameters;
+import org.onap.policy.common.endpoints.parameters.RestServerParameters;
+import org.onap.policy.common.parameters.BeanValidationResult;
+import org.onap.policy.common.parameters.ParameterGroupImpl;
+import org.onap.policy.common.parameters.ValidationStatus;
+import org.onap.policy.common.parameters.annotations.NotNull;
+import org.onap.policy.common.parameters.annotations.Valid;
+import org.onap.policy.models.provider.PolicyModelsProviderParameters;
+
+/**
+ * Class to hold all parameters needed for the participant dcae.
+ *
+ */
+@NotNull
+@NotBlank
+@Getter
+public class ParticipantDcaeParameters extends ParameterGroupImpl {
+    @Valid
+    private RestServerParameters clampClientParameters;
+
+    @Valid
+    private RestServerParameters consulClientParameters;
+
+    private ParticipantIntermediaryParameters intermediaryParameters;
+    private PolicyModelsProviderParameters databaseProviderParameters;
+
+    /**
+     * Create the participant dcae parameter group.
+     *
+     * @param name the parameter group name
+     */
+    public ParticipantDcaeParameters(final String name) {
+        super(name);
+    }
+
+    /**
+     * {@inheritDoc}.
+     */
+    @Override
+    public BeanValidationResult validate() {
+        BeanValidationResult result = super.validate();
+        if (result.isValid()) {
+            result.addResult(checkMissingMandatoryParams(clampClientParameters));
+            result.addResult(checkMissingMandatoryParams(consulClientParameters));
+        }
+        return result;
+    }
+
+    private BeanValidationResult checkMissingMandatoryParams(RestServerParameters clientParameters) {
+        BeanValidationResult result = new BeanValidationResult(clientParameters.getName(), clientParameters);
+        if (StringUtils.isBlank(clientParameters.getHost())) {
+            result.addResult("Host", clientParameters.getHost(), ValidationStatus.INVALID, "is blank");
+        }
+        if (StringUtils.isBlank(clientParameters.getName())) {
+            result.addResult("Name", clientParameters.getName(), ValidationStatus.INVALID, "is blank");
+        }
+        if (StringUtils.isBlank(clientParameters.getPassword())) {
+            result.addResult("Password", clientParameters.getPassword(), ValidationStatus.INVALID, "is blank");
+        }
+        if (StringUtils.isBlank(clientParameters.getUserName())) {
+            result.addResult("UserName", clientParameters.getUserName(), ValidationStatus.INVALID, "is blank");
+        }
+        if (clientParameters.getPort() <= 0 || clientParameters.getPort() >= 65535) {
+            result.addResult("Port", clientParameters.getPort(), ValidationStatus.INVALID, "is not valid");
+        }
+        return result;
+    }
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/startstop/Main.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/startstop/Main.java
new file mode 100644
index 000000000..2b47a2c13
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/startstop/Main.java
@@ -0,0 +1,151 @@
+/*-
+ * ============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.dcae.main.startstop;
+
+import java.util.Arrays;
+import javax.ws.rs.core.Response;
+import lombok.Getter;
+import org.onap.policy.clamp.controlloop.common.ControlLoopConstants;
+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.dcae.main.parameters.ParticipantDcaeParameterHandler;
+import org.onap.policy.clamp.controlloop.participant.dcae.main.parameters.ParticipantDcaeParameters;
+import org.onap.policy.common.utils.resources.MessageConstants;
+import org.onap.policy.common.utils.services.Registry;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class initiates ONAP Policy Framework Control Loop participant component.
+ */
+public class Main {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
+
+    private ParticipantDcaeActivator activator;
+
+    @Getter
+    private ParticipantDcaeParameters parameterGroup;
+
+    /**
+     * Instantiates the control loop participant service.
+     *
+     * @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 ParticipantDcaeCommandLineArguments arguments = new ParticipantDcaeCommandLineArguments();
+        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 ParticipantDcaeParameterHandler().getParameters(arguments);
+
+            // Now, create the activator for the service
+            activator = new ParticipantDcaeActivator(parameterGroup);
+            Registry.register(ControlLoopConstants.REG_CLRUNTIME_ACTIVATOR, activator);
+
+            // Start the activator
+            activator.start();
+        } catch (Exception exp) {
+            if (null != activator) {
+                Registry.unregister(ControlLoopConstants.REG_CLRUNTIME_ACTIVATOR);
+            }
+            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 control loop participant service
+     * when its run method is called.
+     */
+    private class ClRuntimeShutdownHookClass extends Thread {
+        /*
+         * (non-Javadoc)
+         *
+         * @see java.lang.Runnable#run()
+         */
+        @Override
+        public void run() {
+            if (!activator.isAlive()) {
+                return;
+            }
+
+            try {
+                // Shutdown the control loop participant service and wait for everything to stop
+                activator.stop();
+            } catch (final RuntimeException e) {
+                LOGGER.warn("error occured during shut down of the control loop participant service", 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-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/startstop/ParticipantDcaeActivator.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/startstop/ParticipantDcaeActivator.java
new file mode 100644
index 000000000..d485895cf
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/startstop/ParticipantDcaeActivator.java
@@ -0,0 +1,58 @@
+/*-
+ * ============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.dcae.main.startstop;
+
+import java.util.concurrent.atomic.AtomicReference;
+import lombok.Getter;
+import org.onap.policy.clamp.controlloop.participant.dcae.main.handler.DcaeHandler;
+import org.onap.policy.clamp.controlloop.participant.dcae.main.parameters.ParticipantDcaeParameters;
+import org.onap.policy.common.utils.services.ServiceManagerContainer;
+
+/**
+ * This class activates the control loop runtime component as a complete service together with all its controllers,
+ * listeners & handlers.
+ */
+public class ParticipantDcaeActivator extends ServiceManagerContainer {
+    @Getter
+    private final ParticipantDcaeParameters parameters;
+
+    /**
+     * Instantiate the activator for the dcae as a complete service.
+     *
+     * @param parameters the parameters for the control loop runtime service
+     */
+    public ParticipantDcaeActivator(final ParticipantDcaeParameters parameters) {
+        this.parameters = parameters;
+
+        final AtomicReference<DcaeHandler> dcaeHandler = new AtomicReference<>();
+
+        // @formatter:off
+        addAction("Dcae Handler",
+            () -> dcaeHandler.set(new DcaeHandler(parameters)),
+            () -> dcaeHandler.get().close());
+
+        addAction("Dcae Providers",
+            () -> dcaeHandler.get().startProviders(),
+            () -> dcaeHandler.get().stopProviders());
+
+        // @formatter:on
+    }
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/startstop/ParticipantDcaeCommandLineArguments.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/startstop/ParticipantDcaeCommandLineArguments.java
new file mode 100644
index 000000000..0bf382ab1
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/main/startstop/ParticipantDcaeCommandLineArguments.java
@@ -0,0 +1,151 @@
+/*-
+ * ============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.dcae.main.startstop;
+
+import java.io.File;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.net.URL;
+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.HelpFormatter;
+import org.apache.commons.cli.Option;
+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 control loop runtime service.
+ *
+ */
+public class ParticipantDcaeCommandLineArguments {
+    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 dcae participant.
+     */
+    public ParticipantDcaeCommandLineArguments() {
+        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 ParticipantDcaeCommandLineArguments(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 dcae 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-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/model/ExternalComponent.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/model/ExternalComponent.java
new file mode 100644
index 000000000..01a514f43
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/model/ExternalComponent.java
@@ -0,0 +1,35 @@
+/*-
+ * ============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.dcae.model;
+
+import java.io.Serializable;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class ExternalComponent implements Serializable {
+
+    private static final long serialVersionUID = -10;
+
+    private ExternalComponentState componentState;
+
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/model/ExternalComponentState.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/model/ExternalComponentState.java
new file mode 100644
index 000000000..da7360a9b
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/model/ExternalComponentState.java
@@ -0,0 +1,34 @@
+/*-
+ * ============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.dcae.model;
+
+import java.io.Serializable;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class ExternalComponentState implements Serializable {
+
+    private static final long serialVersionUID = -10;
+
+    private String stateName;
+}
diff --git a/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/model/Loop.java b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/model/Loop.java
new file mode 100644
index 000000000..d84270500
--- /dev/null
+++ b/participant/participant-impl/participant-impl-dcae/src/main/java/org/onap/policy/clamp/controlloop/participant/dcae/model/Loop.java
@@ -0,0 +1,36 @@
+/*-
+ * ============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.dcae.model;
+
+import java.io.Serializable;
+import java.util.HashMap;
+import java.util.Map;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class Loop implements Serializable {
+
+    private static final long serialVersionUID = -10;
+
+    private Map<String, ExternalComponent> components = new HashMap<>();
+}