1 files changed, 94 insertions, 0 deletions
diff --git a/services/services-onappf/src/main/java/org/onap/policy/apex/starter/handler/CommunicationHandler.java b/services/services-onappf/src/main/java/org/onap/policy/apex/starter/handler/CommunicationHandler.java
new file mode 100644
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--- /dev/null
+++ b/services/services-onappf/src/main/java/org/onap/policy/apex/starter/handler/CommunicationHandler.java
@@ -0,0 +1,94 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 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.apex.starter.handler;
+
+import java.util.List;
+
+import org.onap.policy.apex.starter.parameters.PdpStatusParameters;
+import org.onap.policy.common.capabilities.Startable;
+import org.onap.policy.common.endpoints.event.comm.TopicSink;
+import org.onap.policy.common.endpoints.event.comm.TopicSource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class manages the communication between apex pdp and pap.
+ *
+ * @author Ajith Sreekumar (ajith.sreekumar@est.tech)
+ */
+public class CommunicationHandler implements Startable {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(CommunicationHandler.class);
+
+    private List<TopicSink> topicSinks; // topics to which apex-pdp sends pdp status
+    private List<TopicSource> topicSources; // topics to which apex-pdp listens to for messages from pap.
+
+    private PdpStatusPublisher pdpStatusPublisher;
+    private PdpStatusParameters pdpStatusParameters;
+
+    /**
+     * Constructor for instantiating CommunicationHandler
+     *
+     * @param topicSinks topics to which apex-pdp sends pdp status
+     * @param topicSources topics to which apex-pdp listens to for messages from pap.
+     * @param pdpStatusParameters pdp status parameters read from the configuration file
+     */
+    public CommunicationHandler(final List<TopicSink> topicSinks, final List<TopicSource> topicSources,
+            final PdpStatusParameters pdpStatusParameters) {
+        this.topicSinks = topicSinks;
+        this.topicSources = topicSources;
+        this.pdpStatusParameters = pdpStatusParameters;
+    }
+
+    @Override
+    public boolean start() {
+        try {
+            pdpStatusPublisher = new PdpStatusPublisher(topicSinks, pdpStatusParameters.getTimeInterval());
+        } catch (final Exception e) {
+            LOGGER.error("Failed to start communication handler for apex-pdp", e);
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean stop() {
+        try {
+            pdpStatusPublisher.terminate();
+        } catch (final Exception e) {
+            LOGGER.error("Failed to stop communication handler for apex-pdp", e);
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public void shutdown() {
+        stop();
+    }
+
+    @Override
+    public boolean isAlive() {
+        return pdpStatusPublisher.isAlive();
+    }
+
+}