1 files changed, 186 insertions, 0 deletions
diff --git a/runtime-controlloop/src/main/java/org/onap/policy/clamp/controlloop/runtime/main/startstop/ClRuntimeActivator.java b/runtime-controlloop/src/main/java/org/onap/policy/clamp/controlloop/runtime/main/startstop/ClRuntimeActivator.java
new file mode 100644
index 000000000..a4238a9c4
--- /dev/null
+++ b/runtime-controlloop/src/main/java/org/onap/policy/clamp/controlloop/runtime/main/startstop/ClRuntimeActivator.java
@@ -0,0 +1,186 @@
+/*-
+ * ============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.runtime.main.startstop;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicReference;
+import javax.ws.rs.core.Response.Status;
+import org.onap.policy.clamp.controlloop.common.exception.ControlLoopRuntimeException;
+import org.onap.policy.clamp.controlloop.common.handler.ControlLoopHandler;
+import org.onap.policy.clamp.controlloop.runtime.commissioning.CommissioningHandler;
+import org.onap.policy.clamp.controlloop.runtime.instantiation.InstantiationHandler;
+import org.onap.policy.clamp.controlloop.runtime.main.parameters.ClRuntimeParameterGroup;
+import org.onap.policy.clamp.controlloop.runtime.main.rest.ControlLoopAafFilter;
+import org.onap.policy.clamp.controlloop.runtime.monitoring.MonitoringHandler;
+import org.onap.policy.clamp.controlloop.runtime.supervision.SupervisionHandler;
+import org.onap.policy.common.endpoints.event.comm.TopicEndpointManager;
+import org.onap.policy.common.endpoints.event.comm.TopicSink;
+import org.onap.policy.common.endpoints.event.comm.TopicSource;
+import org.onap.policy.common.endpoints.http.server.RestServer;
+import org.onap.policy.common.endpoints.listeners.MessageTypeDispatcher;
+import org.onap.policy.common.parameters.ParameterService;
+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 ClRuntimeActivator extends ServiceManagerContainer {
+    // Name of the message type for messages on topics
+    private static final String[] MSG_TYPE_NAMES = {"messageType"};
+
+    private final ClRuntimeParameterGroup clRuntimeParameterGroup;
+
+    // Topics from which the application receives and to which the application sends messages
+    private List<TopicSink> topicSinks;
+    private List<TopicSource> topicSources;
+
+    /**
+     * Listens for messages on the topic, decodes them into a message, and then dispatches them.
+     */
+    private final MessageTypeDispatcher msgDispatcher;
+
+    /**
+     * Instantiate the activator for the control loop runtime as a complete service.
+     *
+     * @param clRuntimeParameterGroup the parameters for the control loop runtime service
+     */
+    public ClRuntimeActivator(final ClRuntimeParameterGroup clRuntimeParameterGroup) {
+
+        if (clRuntimeParameterGroup == null || !clRuntimeParameterGroup.isValid()) {
+            throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR, "ParameterGroup not valid");
+        }
+
+        this.clRuntimeParameterGroup = clRuntimeParameterGroup;
+
+        topicSinks = TopicEndpointManager.getManager()
+                .addTopicSinks(clRuntimeParameterGroup.getTopicParameterGroup().getTopicSinks());
+
+        topicSources = TopicEndpointManager.getManager()
+                .addTopicSources(clRuntimeParameterGroup.getTopicParameterGroup().getTopicSources());
+
+        try {
+            msgDispatcher = new MessageTypeDispatcher(MSG_TYPE_NAMES);
+        } catch (final RuntimeException e) {
+            throw new ControlLoopRuntimeException(Status.INTERNAL_SERVER_ERROR,
+                    "topic message dispatcher failed to start", e);
+        }
+
+        final AtomicReference<ControlLoopHandler> commissioningHandler = new AtomicReference<>();
+        final AtomicReference<ControlLoopHandler> instantiationHandler = new AtomicReference<>();
+        final AtomicReference<ControlLoopHandler> supervisionHandler = new AtomicReference<>();
+        final AtomicReference<ControlLoopHandler> monitoringHandler = new AtomicReference<>();
+        final AtomicReference<RestServer> restServer = new AtomicReference<>();
+
+        // @formatter:off
+        addAction("Control loop runtime parameters",
+            () -> ParameterService.register(clRuntimeParameterGroup),
+            () -> ParameterService.deregister(clRuntimeParameterGroup.getName()));
+
+        addAction("Topic endpoint management",
+            () -> TopicEndpointManager.getManager().start(),
+            () -> TopicEndpointManager.getManager().shutdown());
+
+        addAction("Commissioning Handler",
+                () -> commissioningHandler.set(new CommissioningHandler(clRuntimeParameterGroup)),
+                () -> commissioningHandler.get().close());
+
+        addAction("Instantiation Handler",
+            () -> instantiationHandler.set(new InstantiationHandler(clRuntimeParameterGroup)),
+            () -> instantiationHandler.get().close());
+
+        addAction("Supervision Handler",
+            () -> supervisionHandler.set(new SupervisionHandler(clRuntimeParameterGroup)),
+            () -> supervisionHandler.get().close());
+
+        addAction("Monitoring Handler",
+            () -> monitoringHandler.set(new MonitoringHandler(clRuntimeParameterGroup)),
+            () -> monitoringHandler.get().close());
+
+        addHandlerActions("Commissioning", commissioningHandler);
+        addHandlerActions("Instantiation", instantiationHandler);
+        addHandlerActions("Supervision", supervisionHandler);
+        addHandlerActions("Monitoring", monitoringHandler);
+
+        addAction("Topic Message Dispatcher", this::registerMsgDispatcher, this::unregisterMsgDispatcher);
+
+        clRuntimeParameterGroup.getRestServerParameters().setName(clRuntimeParameterGroup.getName());
+
+        addAction("REST server",
+            () -> {
+                Set<Class<?>> providerClasses = new HashSet<>();
+                providerClasses.addAll(commissioningHandler.get().getProviderClasses());
+                providerClasses.addAll(instantiationHandler.get().getProviderClasses());
+                providerClasses.addAll(supervisionHandler.get().getProviderClasses());
+                providerClasses.addAll(monitoringHandler.get().getProviderClasses());
+
+                RestServer server = new RestServer(clRuntimeParameterGroup.getRestServerParameters(),
+                        ControlLoopAafFilter.class,
+                        providerClasses.toArray(new Class<?>[providerClasses.size()]));
+
+                restServer.set(server);
+                restServer.get().start();
+            },
+            () -> restServer.get().stop());
+        // @formatter:on
+    }
+
+    private void addHandlerActions(final String name, final AtomicReference<ControlLoopHandler> handler) {
+        addAction(name + " Providers",
+            () -> handler.get().startProviders(),
+            () -> handler.get().stopProviders());
+        addAction(name + " Listeners",
+            () -> handler.get().startAndRegisterListeners(msgDispatcher),
+            () -> handler.get().stopAndUnregisterListeners(msgDispatcher));
+        addAction(name + " Publishers",
+            () -> handler.get().startAndRegisterPublishers(topicSinks),
+            () -> handler.get().stopAndUnregisterPublishers());
+    }
+
+    /**
+     * Registers the dispatcher with the topic source(s).
+     */
+    private void registerMsgDispatcher() {
+        for (final TopicSource source : topicSources) {
+            source.register(msgDispatcher);
+        }
+    }
+
+    /**
+     * Unregisters the dispatcher from the topic source(s).
+     */
+    private void unregisterMsgDispatcher() {
+        for (final TopicSource source : topicSources) {
+            source.unregister(msgDispatcher);
+        }
+    }
+
+    /**
+     * Get the parameters used by the activator.
+     *
+     * @return the parameters of the activator
+     */
+    public ClRuntimeParameterGroup getParameterGroup() {
+        return clRuntimeParameterGroup;
+    }
+}