X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=policy-agent%2Fsrc%2Fmain%2Fjava%2Forg%2Foransc%2Fpolicyagent%2Fdmaap%2FDmaapMessageConsumer.java;h=46dd2ee2a3a4cfe330dd14592988fd3963a401c3;hb=61d78df4c74f93d77bc56eaa51280a8cead66209;hp=42be12d3a329bca4434b4c352f81d0d21ca30427;hpb=dac5e37a0197f9aab3c746676963826d5136365c;p=nonrtric.git

diff --git a/policy-agent/src/main/java/org/oransc/policyagent/dmaap/DmaapMessageConsumer.java b/policy-agent/src/main/java/org/oransc/policyagent/dmaap/DmaapMessageConsumer.java
index 42be12d3..46dd2ee2 100644
--- a/policy-agent/src/main/java/org/oransc/policyagent/dmaap/DmaapMessageConsumer.java
+++ b/policy-agent/src/main/java/org/oransc/policyagent/dmaap/DmaapMessageConsumer.java
@@ -1,22 +1,122 @@
+/*-
+ * ========================LICENSE_START=================================
+ * O-RAN-SC
+ * %%
+ * Copyright (C) 2020 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.
+ * ========================LICENSE_END===================================
+ */
+
 package org.oransc.policyagent.dmaap;
 
+import com.google.common.collect.Iterables;
+
+import java.io.IOException;
+import java.time.Duration;
 import java.util.Properties;
 
-/**
- * The Dmaap consumer which has the base methods to be implemented by any class
- * which implements this interface
- *
- */
-public interface DmaapMessageConsumer extends Runnable {
+import org.onap.dmaap.mr.client.MRBatchingPublisher;
+import org.onap.dmaap.mr.client.MRClientFactory;
+import org.onap.dmaap.mr.client.MRConsumer;
+import org.onap.dmaap.mr.client.response.MRConsumerResponse;
+import org.oransc.policyagent.clients.AsyncRestClient;
+import org.oransc.policyagent.configuration.ApplicationConfig;
+import org.oransc.policyagent.exceptions.ServiceException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+@Component
+public class DmaapMessageConsumer implements Runnable {
+
+    private static final Logger logger = LoggerFactory.getLogger(DmaapMessageConsumer.class);
+
+    @SuppressWarnings("squid:S00116") // To avoid warning about DMAAP abbreviation.
+    final Duration TIME_BETWEEN_DMAAP_POLLS = Duration.ofSeconds(10);
+
+    private final ApplicationConfig applicationConfig;
+
+    @Value("${server.port}")
+    private int localServerPort;
+
+    @Autowired
+    public DmaapMessageConsumer(ApplicationConfig applicationConfig) {
+        this.applicationConfig = applicationConfig;
+
+        Thread thread = new Thread(this);
+        thread.start();
+    }
+
+    private boolean isDmaapConfigured() {
+        Properties consumerCfg = applicationConfig.getDmaapConsumerConfig();
+        Properties producerCfg = applicationConfig.getDmaapPublisherConfig();
+        return (consumerCfg != null && consumerCfg.size() > 0 && producerCfg != null && producerCfg.size() > 0);
+    }
 
-	public void init(Properties baseProperties);
+    @Override
+    public void run() {
+        while (sleep(TIME_BETWEEN_DMAAP_POLLS) && isDmaapConfigured()) {
+            try {
+                Iterable<String> dmaapMsgs = fetchAllMessages();
+                if (dmaapMsgs != null && Iterables.size(dmaapMsgs) > 0) {
+                    logger.debug("Fetched all the messages from DMAAP and will start to process the messages");
+                    for (String msg : dmaapMsgs) {
+                        processMsg(msg);
+                    }
+                }
+            } catch (Exception e) {
+                logger.warn("{}: cannot fetch because of ", this, e.getMessage(), e);
+                sleep(TIME_BETWEEN_DMAAP_POLLS);
+            }
+        }
+    }
 
-	public abstract void processMsg(String msg) throws Exception;
+    private Iterable<String> fetchAllMessages() throws ServiceException, IOException {
+        Properties dmaapConsumerProperties = this.applicationConfig.getDmaapConsumerConfig();
+        MRConsumer consumer = MRClientFactory.createConsumer(dmaapConsumerProperties);
+        MRConsumerResponse response = consumer.fetchWithReturnConsumerResponse();
+        if (response == null || !"200".equals(response.getResponseCode())) {
+            throw new ServiceException("DMaaP NULL response received");
+        } else {
+            logger.debug("DMaaP consumer received {} : {}", response.getResponseCode(), response.getResponseMessage());
+            return response.getActualMessages();
+        }
+    }
 
-	public boolean isReady();
+    private void processMsg(String msg) throws IOException {
+        logger.debug("Message Reveived from DMAAP : {}", msg);
+        createDmaapMessageHandler().handleDmaapMsg(msg);
+    }
 
-	public boolean isRunning();
+    private DmaapMessageHandler createDmaapMessageHandler() throws IOException {
+        String agentBaseUrl = "http://localhost:" + this.localServerPort;
+        AsyncRestClient agentClient = new AsyncRestClient(agentBaseUrl);
+        Properties dmaapPublisherProperties = applicationConfig.getDmaapPublisherConfig();
+        MRBatchingPublisher producer = MRClientFactory.createBatchingPublisher(dmaapPublisherProperties);
 
-	public void stopConsumer();
+        return new DmaapMessageHandler(producer, agentClient);
+    }
 
+    private boolean sleep(Duration duration) {
+        try {
+            Thread.sleep(duration.toMillis());
+            return true;
+        } catch (Exception e) {
+            logger.error("Failed to put the thread to sleep", e);
+            return false;
+        }
+    }
 }