Move tosca-controlloop src directries to new modulestosca-poc

This is the second stage of the TOSCA Controlloop merge.

In this review, the src directories of the old tosca-controlloop modules
are moved to the new modules off the root of the clamp repo and the
pom.xml files are updated with dependencies to allow the build of the
moved modules to run.

So the changes are renaming of files and updates of POM files in the
modules to which src directories are added so that the build works, and
of course deletion of the tosca-controlloop directory and its sub-
modules

The third and final review will follow this, which will merge the
tosca-poc branch onto master, in effect merging this review to master.

The differences with the clamp master repo are shown here:
diff -qr clamp clamp-tp | diff_filter.sh
Files clamp/INFO.yaml and clamp-tp/INFO.yaml differ
Only in clamp-tp/common: src
Only in clamp-tp/models: src
Files clamp/participant/participant-impl/participant-impl-dcae/pom.xml and clamp-tp/participant/participant-impl/participant-impl-dcae/pom.xml differ
Only in clamp-tp/participant/participant-impl/participant-impl-dcae: src
Only in clamp-tp/participant/participant-impl/participant-impl-policy: src
Only in clamp-tp/participant/participant-impl/participant-impl-simulator: src
Files clamp/participant/participant-impl/pom.xml and clamp-tp/participant/participant-impl/pom.xml differ
Only in clamp-tp/participant/participant-intermediary: src
Files clamp/participant/pom.xml and clamp-tp/participant/pom.xml differ
Files clamp/pom.xml and clamp-tp/pom.xml 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/pom.xml and clamp-tp/runtime/pom.xml differ
Only in clamp-tp: runtime-controlloop

Issue-ID: POLICY-3215
Change-Id: I0e69e3c566ea387d61f77cfa118bb6d67b4f8253
Signed-off-by: liamfallon <liam.fallon@est.tech>

11 files changed, 1261 insertions, 0 deletions

diff --git a/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/parameters/ParticipantSimulatorParameterHandler.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/parameters/ParticipantSimulatorParameterHandler.java
new file mode 100644
index 000000000..42f458602
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/parameters/ParticipantSimulatorParameterHandler.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.simulator.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.simulator.main.startstop.ParticipantSimulatorCommandLineArguments;
+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 participant simulator parameters from JSON files.
+ */
+public class ParticipantSimulatorParameterHandler {
+
+    private static final Coder CODER = new StandardCoder();
+
+    /**
+     * Read the parameters from the parameter file.
+     *
+     * @param arguments the arguments passed to simulator
+     * @return the parameters read from the configuration file
+     * @throws ControlLoopException on parameter exceptions
+     */
+    public ParticipantSimulatorParameters getParameters(final ParticipantSimulatorCommandLineArguments arguments)
+            throws ControlLoopException {
+        ParticipantSimulatorParameters parameters = null;
+
+        // Read the parameters
+        try {
+            // Read the parameters from JSON
+            File file = new File(arguments.getFullConfigurationFilePath());
+            parameters = CODER.decode(file, ParticipantSimulatorParameters.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-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/parameters/ParticipantSimulatorParameters.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/parameters/ParticipantSimulatorParameters.java
new file mode 100644
index 000000000..a4e62b446
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/parameters/ParticipantSimulatorParameters.java
@@ -0,0 +1,51 @@
+/*-
+ * ============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.simulator.main.parameters;
+
+import javax.validation.constraints.NotBlank;
+import lombok.Getter;
+import org.onap.policy.clamp.controlloop.participant.intermediary.parameters.ParticipantIntermediaryParameters;
+import org.onap.policy.common.endpoints.parameters.RestServerParameters;
+import org.onap.policy.common.parameters.ParameterGroupImpl;
+import org.onap.policy.common.parameters.annotations.NotNull;
+import org.onap.policy.models.provider.PolicyModelsProviderParameters;
+
+/**
+ * Class to hold all parameters needed for the participant simulator.
+ *
+ */
+@NotNull
+@NotBlank
+@Getter
+public class ParticipantSimulatorParameters extends ParameterGroupImpl {
+    private RestServerParameters restServerParameters;
+    private ParticipantIntermediaryParameters intermediaryParameters;
+    private PolicyModelsProviderParameters databaseProviderParameters;
+
+    /**
+     * Create the participant simulator parameter group.
+     *
+     * @param name the parameter group name
+     */
+    public ParticipantSimulatorParameters(final String name) {
+        super(name);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/rest/ParticipantSimulatorAafFilter.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/rest/ParticipantSimulatorAafFilter.java
new file mode 100644
index 000000000..f200f975a
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/rest/ParticipantSimulatorAafFilter.java
@@ -0,0 +1,38 @@
+/*-
+ * ============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.simulator.main.rest;
+
+import org.onap.policy.common.endpoints.http.server.aaf.AafGranularAuthFilter;
+import org.onap.policy.common.utils.resources.MessageConstants;
+
+/**
+ * Class to manage AAF filters for the participant simulator component.
+ */
+public class ParticipantSimulatorAafFilter extends AafGranularAuthFilter {
+
+    public static final String AAF_NODETYPE = MessageConstants.POLICY_CLAMP + "-participant-simulator";
+    public static final String AAF_ROOT_PERMISSION = DEFAULT_NAMESPACE + "." + AAF_NODETYPE;
+
+    @Override
+    public String getPermissionTypeRoot() {
+        return AAF_ROOT_PERMISSION;
+    }
+}
diff --git a/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/rest/RestController.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/rest/RestController.java
new file mode 100644
index 000000000..444f37889
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/rest/RestController.java
@@ -0,0 +1,130 @@
+/*-
+ * ============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.simulator.main.rest;
+
+import io.swagger.annotations.Api;
+import io.swagger.annotations.BasicAuthDefinition;
+import io.swagger.annotations.Info;
+import io.swagger.annotations.SecurityDefinition;
+import io.swagger.annotations.SwaggerDefinition;
+import io.swagger.annotations.Tag;
+import java.net.HttpURLConnection;
+import java.util.UUID;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response.ResponseBuilder;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.onap.policy.clamp.controlloop.participant.simulator.simulation.SimulationHandler;
+import org.onap.policy.clamp.controlloop.participant.simulator.simulation.SimulationProvider;
+
+/**
+ * Common superclass to provide REST endpoints for the participant simulator.
+ */
+// @formatter:off
+@Path("/onap/participantsim/v2")
+@Api(value = "Participant Simulator API")
+@Produces({MediaType.APPLICATION_JSON, RestController.APPLICATION_YAML})
+@SwaggerDefinition(
+    info = @Info(description =
+                    "Participant Simulator", version = "v1.0",
+                    title = "Participant Simulator"),
+    consumes = {MediaType.APPLICATION_JSON, RestController.APPLICATION_YAML},
+    produces = {MediaType.APPLICATION_JSON, RestController.APPLICATION_YAML},
+    schemes = {SwaggerDefinition.Scheme.HTTP, SwaggerDefinition.Scheme.HTTPS},
+    tags = {@Tag(name = "participantsim", description = "Participant Simulator")},
+    securityDefinition = @SecurityDefinition(basicAuthDefinitions = {@BasicAuthDefinition(key = "basicAuth")}))
+// @formatter:on
+public class RestController {
+    public static final String APPLICATION_YAML = "application/yaml";
+
+    public static final String EXTENSION_NAME = "interface info";
+
+    public static final String API_VERSION_NAME = "api-version";
+    public static final String API_VERSION = "1.0.0";
+
+    public static final String LAST_MOD_NAME = "last-mod-release";
+    public static final String LAST_MOD_RELEASE = "Dublin";
+
+    public static final String VERSION_MINOR_NAME = "X-MinorVersion";
+    public static final String VERSION_MINOR_DESCRIPTION =
+            "Used to request or communicate a MINOR version back from the client"
+                    + " to the server, and from the server back to the client";
+
+    public static final String VERSION_PATCH_NAME = "X-PatchVersion";
+    public static final String VERSION_PATCH_DESCRIPTION = "Used only to communicate a PATCH version in a response for"
+            + " troubleshooting purposes only, and will not be provided by" + " the client on request";
+
+    public static final String VERSION_LATEST_NAME = "X-LatestVersion";
+    public static final String VERSION_LATEST_DESCRIPTION = "Used only to communicate an API's latest version";
+
+    public static final String REQUEST_ID_NAME = "X-ONAP-RequestID";
+    public static final String REQUEST_ID_HDR_DESCRIPTION = "Used to track REST transactions for logging purpose";
+    public static final String REQUEST_ID_PARAM_DESCRIPTION = "RequestID for http transaction";
+
+    public static final String AUTHORIZATION_TYPE = "basicAuth";
+
+    public static final int AUTHENTICATION_ERROR_CODE = HttpURLConnection.HTTP_UNAUTHORIZED;
+    public static final int AUTHORIZATION_ERROR_CODE = HttpURLConnection.HTTP_FORBIDDEN;
+    public static final int SERVER_ERROR_CODE = HttpURLConnection.HTTP_INTERNAL_ERROR;
+
+    public static final String AUTHENTICATION_ERROR_MESSAGE = "Authentication Error";
+    public static final String AUTHORIZATION_ERROR_MESSAGE = "Authorization Error";
+    public static final String SERVER_ERROR_MESSAGE = "Internal Server Error";
+    @Getter(AccessLevel.PROTECTED)
+    // The provider for simulation requests
+    private SimulationProvider simulationProvider;
+
+
+    /**
+     * create a Rest Controller.
+     */
+    public RestController() {
+        simulationProvider = SimulationHandler.getInstance().getSimulationProvider();
+    }
+
+    /**
+     * Adds version headers to the response.
+     *
+     * @param respBuilder response builder
+     * @return the response builder, with version headers
+     */
+    public ResponseBuilder addVersionControlHeaders(ResponseBuilder respBuilder) {
+        return respBuilder.header(VERSION_MINOR_NAME, "0").header(VERSION_PATCH_NAME, "0").header(VERSION_LATEST_NAME,
+                API_VERSION);
+    }
+
+    /**
+     * Adds logging headers to the response.
+     *
+     * @param respBuilder response builder
+     * @return the response builder, with version logging
+     */
+    public ResponseBuilder addLoggingHeaders(ResponseBuilder respBuilder, UUID requestId) {
+        if (requestId == null) {
+            // Generate a random uuid if client does not embed requestId in rest request
+            return respBuilder.header(REQUEST_ID_NAME, UUID.randomUUID());
+        }
+
+        return respBuilder.header(REQUEST_ID_NAME, requestId);
+    }
+}
diff --git a/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/startstop/Main.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/startstop/Main.java
new file mode 100644
index 000000000..e6c93d55d
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/startstop/Main.java
@@ -0,0 +1,141 @@
+/*-
+ * ============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.simulator.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.simulator.main.parameters.ParticipantSimulatorParameterHandler;
+import org.onap.policy.clamp.controlloop.participant.simulator.main.parameters.ParticipantSimulatorParameters;
+import org.onap.policy.common.utils.resources.MessageConstants;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class initiates participant simulator.
+ */
+public class Main {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(Main.class);
+
+    private ParticipantSimulatorActivator activator;
+
+    @Getter
+    private ParticipantSimulatorParameters 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 participant service with arguments - {}", argumentString);
+
+        // Check the arguments
+        final ParticipantSimulatorCommandLineArguments arguments = new ParticipantSimulatorCommandLineArguments();
+        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 ParticipantSimulatorParameterHandler().getParameters(arguments);
+
+            // Now, create the activator for the service
+            activator = new ParticipantSimulatorActivator(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 ClParticipantSimulatorShutdownHookClass());
+        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 ClParticipantSimulatorShutdownHookClass terminates the control loop participant service
+     * when its run method is called.
+     */
+    private class ClParticipantSimulatorShutdownHookClass extends Thread {
+        /*
+         * (non-Javadoc)
+         *
+         * @see java.lang.Runnable#run()
+         */
+        @Override
+        public void run() {
+            try {
+                // Shutdown the participant simulator and wait for everything to stop
+                shutdown();
+            } catch (final RuntimeException | ControlLoopException e) {
+                LOGGER.warn("error occured during shut down of the participant simulator", 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-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/startstop/ParticipantSimulatorActivator.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/startstop/ParticipantSimulatorActivator.java
new file mode 100644
index 000000000..4daa0393f
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/startstop/ParticipantSimulatorActivator.java
@@ -0,0 +1,75 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.clamp.controlloop.participant.simulator.main.startstop;
+
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+import lombok.Getter;
+import org.onap.policy.clamp.controlloop.participant.simulator.main.parameters.ParticipantSimulatorParameters;
+import org.onap.policy.clamp.controlloop.participant.simulator.main.rest.ParticipantSimulatorAafFilter;
+import org.onap.policy.clamp.controlloop.participant.simulator.simulation.SimulationHandler;
+import org.onap.policy.common.endpoints.http.server.RestServer;
+import org.onap.policy.common.utils.services.ServiceManagerContainer;
+
+/**
+ * This class activates the participant simulator component as a complete service together with all its controllers,
+ * listeners and handlers.
+ */
+public class ParticipantSimulatorActivator extends ServiceManagerContainer {
+    @Getter
+    private final ParticipantSimulatorParameters parameters;
+
+    /**
+     * Instantiate the activator for the simulator as a complete service.
+     *
+     * @param parameters the parameters for the participant service
+     */
+    public ParticipantSimulatorActivator(final ParticipantSimulatorParameters parameters) {
+        this.parameters = parameters;
+
+        final AtomicReference<SimulationHandler> simulationHandler = new AtomicReference<>();
+        final AtomicReference<RestServer> restServer = new AtomicReference<>();
+
+        // @formatter:off
+        addAction("Simulation Handler",
+            () -> simulationHandler.set(new SimulationHandler(parameters)),
+            () -> simulationHandler.get().close());
+
+        addAction("Simulation Providers",
+            () -> simulationHandler.get().startProviders(),
+            () -> simulationHandler.get().stopProviders());
+
+        parameters.getRestServerParameters().setName(parameters.getName());
+
+        addAction("REST server",
+            () -> {
+                Set<Class<?>> providerClasses = simulationHandler.get().getProviderClasses();
+
+                RestServer server = new RestServer(parameters.getRestServerParameters(),
+                        ParticipantSimulatorAafFilter.class,
+                        providerClasses.toArray(new Class<?>[providerClasses.size()]));
+                restServer.set(server);
+                restServer.get().start();
+            },
+            () -> restServer.get().stop());
+        // @formatter:on
+    }
+}
diff --git a/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/startstop/ParticipantSimulatorCommandLineArguments.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/startstop/ParticipantSimulatorCommandLineArguments.java
new file mode 100644
index 000000000..51ac3a4d5
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/main/startstop/ParticipantSimulatorCommandLineArguments.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.simulator.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 participant simulator service.
+ *
+ */
+public class ParticipantSimulatorCommandLineArguments {
+    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 participant component.
+     */
+    public ParticipantSimulatorCommandLineArguments() {
+        options = new Options();
+        commonCommandLineArguments = new CommonCommandLineArguments(options);
+    }
+
+    /**
+     * Construct the options for the participant component and parse in the given arguments.
+     *
+     * @param args The command line arguments
+     */
+    public ParticipantSimulatorCommandLineArguments(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 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-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/SimulationHandler.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/SimulationHandler.java
new file mode 100644
index 000000000..df7f2a611
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/SimulationHandler.java
@@ -0,0 +1,81 @@
+/*-
+ * ============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.simulator.simulation;
+
+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.simulator.main.parameters.ParticipantSimulatorParameters;
+import org.onap.policy.clamp.controlloop.participant.simulator.simulation.rest.SimulationElementController;
+import org.onap.policy.clamp.controlloop.participant.simulator.simulation.rest.SimulationParticipantController;
+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 simulation of participants and control loop elements.
+ *
+ * <p/>It is effectively a singleton that is started at system start.
+ */
+public class SimulationHandler extends ControlLoopHandler {
+    private final ParticipantIntermediaryParameters participantParameters;
+
+    @Getter
+    private SimulationProvider simulationProvider;
+
+    /**
+     * Create a handler.
+     *
+     * @param parameters the parameters for access to the database
+     */
+    public SimulationHandler(ParticipantSimulatorParameters parameters) {
+        super(parameters.getDatabaseProviderParameters());
+        participantParameters = parameters.getIntermediaryParameters();
+    }
+
+    public static SimulationHandler getInstance() {
+        return Registry.get(SimulationHandler.class.getName());
+    }
+
+    @Override
+    public Set<Class<?>> getProviderClasses() {
+        return Set.of(SimulationElementController.class, SimulationParticipantController.class);
+    }
+
+    @Override
+    public void startProviders() {
+        simulationProvider = new SimulationProvider(participantParameters);
+    }
+
+    @Override
+    public void stopProviders() {
+        try {
+            simulationProvider.close();
+        } catch (IOException e) {
+            throw new PfModelRuntimeException(Response.Status.INTERNAL_SERVER_ERROR, "Stop providers failed ", e);
+        }
+    }
+}
diff --git a/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/SimulationProvider.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/SimulationProvider.java
new file mode 100644
index 000000000..1fcbba3af
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/SimulationProvider.java
@@ -0,0 +1,129 @@
+/*-
+ * ============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.simulator.simulation;
+
+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.ControlLoop;
+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.intermediary.api.ParticipantIntermediaryApi;
+import org.onap.policy.clamp.controlloop.participant.intermediary.api.ParticipantIntermediaryFactory;
+import org.onap.policy.clamp.controlloop.participant.intermediary.parameters.ParticipantIntermediaryParameters;
+
+/**
+ * This provider class simulation of participants and control loop elements.
+ */
+public class SimulationProvider implements Closeable {
+    @Getter
+    private final ParticipantIntermediaryApi intermediaryApi;
+
+    /**
+     * Create a participant simulation provider.
+     *
+     * @throws ControlLoopRuntimeException on errors creating the provider
+     */
+    public SimulationProvider(ParticipantIntermediaryParameters participantParameters)
+                     throws ControlLoopRuntimeException {
+        intermediaryApi = new ParticipantIntermediaryFactory().createApiImplementation();
+        intermediaryApi.init(participantParameters);
+    }
+
+    @Override
+    public void close() throws IOException {
+        intermediaryApi.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 simulated 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 simulator.
+     *
+     * @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 simulated 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 simulated 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-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/rest/SimulationElementController.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/rest/SimulationElementController.java
new file mode 100644
index 000000000..1869047c9
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/rest/SimulationElementController.java
@@ -0,0 +1,195 @@
+/*-
+ * ============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.simulator.simulation.rest;
+
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
+import io.swagger.annotations.ApiResponse;
+import io.swagger.annotations.ApiResponses;
+import io.swagger.annotations.Authorization;
+import io.swagger.annotations.Extension;
+import io.swagger.annotations.ExtensionProperty;
+import io.swagger.annotations.ResponseHeader;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import javax.ws.rs.GET;
+import javax.ws.rs.HeaderParam;
+import javax.ws.rs.PUT;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
+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.messages.rest.SimpleResponse;
+import org.onap.policy.clamp.controlloop.models.messages.rest.TypedSimpleResponse;
+import org.onap.policy.clamp.controlloop.participant.simulator.main.rest.RestController;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Class to provide REST end points for participant simulator to query/update details of controlLoopElements.
+ */
+public class SimulationElementController extends RestController {
+    private static final Logger LOGGER = LoggerFactory.getLogger(SimulationElementController.class);
+
+    /**
+     * Queries details of all control loop element within the simulator.
+     *
+     * @param requestId request ID used in ONAP logging
+     * @param name the name of the Control Loop element to get, null to get all
+     * @param version the version of the Control Loop element to get, null to get all
+     * @return the control loop elements
+     */
+    // @formatter:off
+    @GET
+    @Path("/elements/{name}/{version}")
+    @ApiOperation(value = "Query details of the requested simulated control loop elements",
+            notes = "Queries details of the requested simulated control loop elements, "
+                    + "returning all control loop element details",
+            response = ControlLoops.class,
+            tags = {
+                "Clamp Control Loop Participant Simulator API"
+            },
+            authorizations = @Authorization(value = AUTHORIZATION_TYPE),
+            responseHeaders = {
+                    @ResponseHeader(
+                            name = VERSION_MINOR_NAME, description = VERSION_MINOR_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(name = VERSION_PATCH_NAME, description = VERSION_PATCH_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(name = VERSION_LATEST_NAME, description = VERSION_LATEST_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(name = REQUEST_ID_NAME, description = REQUEST_ID_HDR_DESCRIPTION,
+                            response = UUID.class)},
+            extensions = {
+                    @Extension(
+                            name = EXTENSION_NAME,
+                            properties = {
+                                    @ExtensionProperty(name = API_VERSION_NAME, value = API_VERSION),
+                                    @ExtensionProperty(name = LAST_MOD_NAME, value = LAST_MOD_RELEASE)
+                            }
+                    )
+            }
+    )
+    @ApiResponses(
+            value = {
+                    @ApiResponse(code = AUTHENTICATION_ERROR_CODE, message = AUTHENTICATION_ERROR_MESSAGE),
+                    @ApiResponse(code = AUTHORIZATION_ERROR_CODE, message = AUTHORIZATION_ERROR_MESSAGE),
+                    @ApiResponse(code = SERVER_ERROR_CODE, message = SERVER_ERROR_MESSAGE)
+            }
+    )
+    // @formatter:on
+    public Response elements(@HeaderParam(REQUEST_ID_NAME) @ApiParam(REQUEST_ID_PARAM_DESCRIPTION) UUID requestId,
+            @ApiParam(value = "Control loop element name", required = true) @PathParam("name") String name,
+            @ApiParam(value = "Control loop element version", required = true) @PathParam("version") String version) {
+
+        try {
+            Map<UUID, ControlLoopElement> response = getSimulationProvider().getControlLoopElements(name, version);
+            return addLoggingHeaders(addVersionControlHeaders(Response.status(Status.OK)), requestId).entity(response)
+                    .build();
+
+        } catch (ControlLoopException cle) {
+            LOGGER.warn("get of control loop elements failed", cle);
+            SimpleResponse resp = new SimpleResponse();
+            resp.setErrorDetails(cle.getErrorResponse().getErrorMessage());
+            return addLoggingHeaders(
+                    addVersionControlHeaders(Response.status(cle.getErrorResponse().getResponseCode())), requestId)
+                            .entity(resp).build();
+        }
+
+    }
+
+    /**
+     * Updates a control loop element in the simulator.
+     *
+     * @param requestId request ID used in ONAP logging
+     * @param body the body of a control loop element
+     * @return a response
+     */
+    // @formatter:off
+    @PUT
+    @Path("/elements")
+    @ApiOperation(
+            value = "Updates simulated control loop elements",
+            notes = "Updates simulated control loop elements, returning the updated control loop definition IDs",
+            response = TypedSimpleResponse.class,
+            tags = {
+                "Clamp Control Loop Participant Simulator API"
+                },
+            authorizations = @Authorization(value = AUTHORIZATION_TYPE),
+            responseHeaders = {
+                    @ResponseHeader(
+                            name = VERSION_MINOR_NAME,
+                            description = VERSION_MINOR_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(
+                            name = VERSION_PATCH_NAME,
+                            description = VERSION_PATCH_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(
+                            name = VERSION_LATEST_NAME,
+                            description = VERSION_LATEST_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(
+                            name = REQUEST_ID_NAME,
+                            description = REQUEST_ID_HDR_DESCRIPTION,
+                            response = UUID.class)
+                },
+            extensions = {
+                @Extension(
+                    name = EXTENSION_NAME,
+                    properties = {
+                            @ExtensionProperty(name = API_VERSION_NAME, value = API_VERSION),
+                            @ExtensionProperty(name = LAST_MOD_NAME, value = LAST_MOD_RELEASE)
+                    }
+                )
+            }
+        )
+    @ApiResponses(
+            value = {
+                @ApiResponse(code = AUTHENTICATION_ERROR_CODE, message = AUTHENTICATION_ERROR_MESSAGE),
+                @ApiResponse(code = AUTHORIZATION_ERROR_CODE, message = AUTHORIZATION_ERROR_MESSAGE),
+                @ApiResponse(code = SERVER_ERROR_CODE, message = SERVER_ERROR_MESSAGE)
+            }
+        )
+    // @formatter:on
+    public Response update(@HeaderParam(REQUEST_ID_NAME) @ApiParam(REQUEST_ID_PARAM_DESCRIPTION) UUID requestId,
+            @ApiParam(value = "Body of a control loop element", required = true) ControlLoopElement body) {
+
+        try {
+            TypedSimpleResponse<ControlLoopElement> response =
+                    getSimulationProvider().updateControlLoopElement(body);
+            return addLoggingHeaders(addVersionControlHeaders(Response.status(Status.OK)), requestId).entity(response)
+                    .build();
+
+        } catch (ControlLoopException cle) {
+            LOGGER.warn("update of control loop element failed", cle);
+            TypedSimpleResponse<ControlLoopElement> resp = new TypedSimpleResponse<>();
+            resp.setErrorDetails(cle.getErrorResponse().getErrorMessage());
+            return addLoggingHeaders(
+                    addVersionControlHeaders(Response.status(cle.getErrorResponse().getResponseCode())), requestId)
+                            .entity(resp).build();
+        }
+    }
+}
diff --git a/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/rest/SimulationParticipantController.java b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/rest/SimulationParticipantController.java
new file mode 100644
index 000000000..d6ca6d0d1
--- /dev/null
+++ b/participant/participant-impl/participant-impl-simulator/src/main/java/org/onap/policy/clamp/controlloop/participant/simulator/simulation/rest/SimulationParticipantController.java
@@ -0,0 +1,192 @@
+/*-
+ * ============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.simulator.simulation.rest;
+
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
+import io.swagger.annotations.ApiResponse;
+import io.swagger.annotations.ApiResponses;
+import io.swagger.annotations.Authorization;
+import io.swagger.annotations.Extension;
+import io.swagger.annotations.ExtensionProperty;
+import io.swagger.annotations.ResponseHeader;
+import java.util.List;
+import java.util.UUID;
+import javax.ws.rs.GET;
+import javax.ws.rs.HeaderParam;
+import javax.ws.rs.PUT;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import org.onap.policy.clamp.controlloop.common.exception.ControlLoopException;
+import org.onap.policy.clamp.controlloop.models.controlloop.concepts.Participant;
+import org.onap.policy.clamp.controlloop.models.messages.rest.SimpleResponse;
+import org.onap.policy.clamp.controlloop.models.messages.rest.TypedSimpleResponse;
+import org.onap.policy.clamp.controlloop.participant.simulator.main.rest.RestController;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Class to provide REST end points for participant simulator to query/update details of all participants.
+ */
+public class SimulationParticipantController extends RestController {
+    private static final Logger LOGGER = LoggerFactory.getLogger(SimulationParticipantController.class);
+
+    /**
+     * Queries details of all participants within the simulator.
+     *
+     * @param requestId request ID used in ONAP logging
+     * @param name the name of the participant to get, null to get all
+     * @param version the version of the participant to get, null to get all
+     * @return the participants
+     */
+    // @formatter:off
+    @GET
+    @Path("/participants/{name}/{version}")
+    @ApiOperation(value = "Query details of the requested simulated participants",
+            notes = "Queries details of the requested simulated participants, "
+                    + "returning all participant details",
+            response = List.class,
+            tags = {
+                "Clamp Control Loop Participant Simulator API"
+            },
+            authorizations = @Authorization(value = AUTHORIZATION_TYPE),
+            responseHeaders = {
+                    @ResponseHeader(
+                            name = VERSION_MINOR_NAME, description = VERSION_MINOR_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(name = VERSION_PATCH_NAME, description = VERSION_PATCH_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(name = VERSION_LATEST_NAME, description = VERSION_LATEST_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(name = REQUEST_ID_NAME, description = REQUEST_ID_HDR_DESCRIPTION,
+                            response = UUID.class)},
+            extensions = {
+                    @Extension(
+                            name = EXTENSION_NAME,
+                            properties = {
+                                    @ExtensionProperty(name = API_VERSION_NAME, value = API_VERSION),
+                                    @ExtensionProperty(name = LAST_MOD_NAME, value = LAST_MOD_RELEASE)
+                            }
+                    )
+            }
+    )
+    @ApiResponses(
+            value = {
+                    @ApiResponse(code = AUTHENTICATION_ERROR_CODE, message = AUTHENTICATION_ERROR_MESSAGE),
+                    @ApiResponse(code = AUTHORIZATION_ERROR_CODE, message = AUTHORIZATION_ERROR_MESSAGE),
+                    @ApiResponse(code = SERVER_ERROR_CODE, message = SERVER_ERROR_MESSAGE)
+            }
+    )
+    // @formatter:on
+    public Response participants(@HeaderParam(REQUEST_ID_NAME) @ApiParam(REQUEST_ID_PARAM_DESCRIPTION) UUID requestId,
+            @ApiParam(value = "Participant name", required = true) @PathParam("name") String name,
+            @ApiParam(value = "Participant version", required = true) @PathParam("version") String version) {
+
+        try {
+            List<Participant> response = getSimulationProvider().getParticipants(name, version);
+            return addLoggingHeaders(addVersionControlHeaders(Response.status(Status.OK)), requestId).entity(response)
+                    .build();
+
+        } catch (ControlLoopException cle) {
+            LOGGER.warn("get of participants failed", cle);
+            SimpleResponse resp = new SimpleResponse();
+            resp.setErrorDetails(cle.getErrorResponse().getErrorMessage());
+            return addLoggingHeaders(
+                    addVersionControlHeaders(Response.status(cle.getErrorResponse().getResponseCode())), requestId)
+                            .entity(resp).build();
+        }
+
+    }
+
+    /**
+     * Updates a participant in the simulator.
+     *
+     * @param requestId request ID used in ONAP logging
+     * @param body the body of a participant
+     * @return a response
+     */
+    // @formatter:off
+    @PUT
+    @Path("/participants")
+    @ApiOperation(
+            value = "Updates simulated participants",
+            notes = "Updates simulated participants, returning the updated control loop definition IDs",
+            response = TypedSimpleResponse.class,
+            tags = {
+                "Clamp Control Loop Participant Simulator API"
+                },
+            authorizations = @Authorization(value = AUTHORIZATION_TYPE),
+            responseHeaders = {
+                    @ResponseHeader(
+                            name = VERSION_MINOR_NAME,
+                            description = VERSION_MINOR_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(
+                            name = VERSION_PATCH_NAME,
+                            description = VERSION_PATCH_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(
+                            name = VERSION_LATEST_NAME,
+                            description = VERSION_LATEST_DESCRIPTION,
+                            response = String.class),
+                    @ResponseHeader(
+                            name = REQUEST_ID_NAME,
+                            description = REQUEST_ID_HDR_DESCRIPTION,
+                            response = UUID.class)
+                },
+            extensions = {
+                @Extension(
+                    name = EXTENSION_NAME,
+                    properties = {
+                            @ExtensionProperty(name = API_VERSION_NAME, value = API_VERSION),
+                            @ExtensionProperty(name = LAST_MOD_NAME, value = LAST_MOD_RELEASE)
+                    }
+                )
+            }
+        )
+    @ApiResponses(
+            value = {
+                @ApiResponse(code = AUTHENTICATION_ERROR_CODE, message = AUTHENTICATION_ERROR_MESSAGE),
+                @ApiResponse(code = AUTHORIZATION_ERROR_CODE, message = AUTHORIZATION_ERROR_MESSAGE),
+                @ApiResponse(code = SERVER_ERROR_CODE, message = SERVER_ERROR_MESSAGE)
+            }
+        )
+    // @formatter:on
+    public Response update(@HeaderParam(REQUEST_ID_NAME) @ApiParam(REQUEST_ID_PARAM_DESCRIPTION) UUID requestId,
+            @ApiParam(value = "Body of a participant", required = true) Participant body) {
+
+        try {
+            TypedSimpleResponse<Participant> response = getSimulationProvider().updateParticipant(body);
+            return addLoggingHeaders(addVersionControlHeaders(Response.status(Status.OK)), requestId).entity(response)
+                    .build();
+
+        } catch (ControlLoopException cle) {
+            LOGGER.warn("update of participant failed", cle);
+            TypedSimpleResponse<Participant> resp = new TypedSimpleResponse<>();
+            resp.setErrorDetails(cle.getErrorResponse().getErrorMessage());
+            return addLoggingHeaders(
+                    addVersionControlHeaders(Response.status(cle.getErrorResponse().getResponseCode())), requestId)
+                            .entity(resp).build();
+        }
+    }
+}