1 files changed, 68 insertions, 0 deletions
diff --git a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/controlloop/participant/intermediary/comm/ControlLoopStateChangeListener.java b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/controlloop/participant/intermediary/comm/ControlLoopStateChangeListener.java
new file mode 100644
index 000000000..50b8b9cdc
--- /dev/null
+++ b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/controlloop/participant/intermediary/comm/ControlLoopStateChangeListener.java
@@ -0,0 +1,68 @@
+/*-
+ * ============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.intermediary.comm;
+
+import java.io.Closeable;
+import org.onap.policy.clamp.controlloop.models.messages.dmaap.participant.ParticipantControlLoopStateChange;
+import org.onap.policy.clamp.controlloop.participant.intermediary.handler.ParticipantHandler;
+import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
+import org.onap.policy.common.endpoints.listeners.ScoListener;
+import org.onap.policy.common.utils.coder.StandardCoderObject;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Listener for Participant State Change messages sent by CLAMP.
+ */
+public class ControlLoopStateChangeListener extends ScoListener<ParticipantControlLoopStateChange>
+        implements Closeable {
+    private static final Logger LOGGER = LoggerFactory.getLogger(ControlLoopStateChangeListener.class);
+
+    private final ParticipantHandler participantHandler;
+
+    /**
+     * Constructs the object.
+     *
+     * @param participantHandler the handler for managing the state of the participant
+     */
+    public ControlLoopStateChangeListener(final ParticipantHandler participantHandler) {
+        super(ParticipantControlLoopStateChange.class);
+        this.participantHandler = participantHandler;
+    }
+
+    @Override
+    public void onTopicEvent(final CommInfrastructure infra, final String topic, final StandardCoderObject sco,
+            final ParticipantControlLoopStateChange controlLoopStateChangeMsg) {
+        LOGGER.debug("Control Loop State Change received from CLAMP - {}", controlLoopStateChangeMsg);
+
+        if (participantHandler.canHandle(controlLoopStateChangeMsg)) {
+            LOGGER.debug("Message for this participant");
+            participantHandler.getControlLoopHandler().handleControlLoopStateChange(controlLoopStateChangeMsg);
+        } else {
+            LOGGER.debug("Message not for this participant");
+        }
+    }
+
+    @Override
+    public void close() {
+        // No explicit action on this class
+    }
+}