1 files changed, 67 insertions, 0 deletions
diff --git a/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/comm/ParticipantAckListener.java b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/comm/ParticipantAckListener.java
new file mode 100644
index 000000000..c5427db6b
--- /dev/null
+++ b/participant/participant-intermediary/src/main/java/org/onap/policy/clamp/acm/participant/intermediary/comm/ParticipantAckListener.java
@@ -0,0 +1,67 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 Nordix Foundation.
+ *  Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.acm.participant.intermediary.comm;
+
+import java.util.function.Consumer;
+import org.onap.policy.clamp.acm.participant.intermediary.handler.Listener;
+import org.onap.policy.clamp.acm.participant.intermediary.handler.ParticipantHandler;
+import org.onap.policy.clamp.models.acm.messages.dmaap.participant.ParticipantAckMessage;
+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;
+
+/**
+ * Abstract Listener for Participant Ack messages sent by runtime.
+ */
+public abstract class ParticipantAckListener<T extends ParticipantAckMessage> extends ScoListener<T>
+                implements Listener<T> {
+
+    private final ParticipantHandler participantHandler;
+    private final Consumer<T> consumer;
+
+    /**
+     * Constructs the object.
+     *
+     * @param clazz class of message this handles
+     * @param participantHandler ParticipantHandler
+     * @param consumer function that handles the message
+     */
+    protected ParticipantAckListener(Class<T> clazz, ParticipantHandler participantHandler, Consumer<T> consumer) {
+        super(clazz);
+        this.participantHandler = participantHandler;
+        this.consumer = consumer;
+    }
+
+    @Override
+    public void onTopicEvent(CommInfrastructure infra, String topic, StandardCoderObject sco, T message) {
+        if (participantHandler.appliesTo(message)) {
+            consumer.accept(message);
+        }
+    }
+
+    @Override
+    public ScoListener<T> getScoListener() {
+        return this;
+    }
+}