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=e72fcf0b253fc9c8b65c2f3f4c17a370b0c2ff82;hb=dede1d28c8f37bb21fae806f00f8315b923670c1;hp=889dfafaaee5c8bdec2d24aa1e751145f2e3d534;hpb=d1b7bb42fe20c8c0131959f3e96668d8e6669d04;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 889dfafa..e72fcf0b 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
@@ -1,9 +1,8 @@
-
 /*-
  * ========================LICENSE_START=================================
  * O-RAN-SC
  * %%
- * Copyright (C) 2019 Nordix Foundation
+ * 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.
@@ -21,43 +20,129 @@
 
 package org.oransc.policyagent.dmaap;
 
-/**
- * The Dmaap consumer which has the base methods to be implemented by any class which implements this interface
- *
- */
-public interface DmaapMessageConsumer {
-
-    /**
-     * The init method creates the MRConsumer with the properties passed from the Application Config
-     *
-     * @param properties
-     */
-    public void init();
-
-    /**
-     * This method process the message and call the respective Controller
-     *
-     * @param msg
-     * @throws Exception
-     */
-    public abstract void processMsg(String msg) throws Exception;
-
-    /**
-     * To check whether the DMAAP Listner is alive
-     *
-     * @return boolean
-     */
-    public boolean isAlive();
-
-    /**
-     * To Stop the DMAAP Listener
-     */
-    public void stopConsumer();
-
-    /**
-     * It's a infinite loop run every configured seconds to fetch the message from DMAAP. This method can be stop by
-     * setting the alive flag to false
-     */
-    public void run();
+import com.google.common.collect.Iterables;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.time.Duration;
+import java.util.Properties;
+
+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);
+
+    private final static 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();
+    }
+
+    DmaapMessageConsumer(ApplicationConfig applicationConfig, boolean start) {
+        this.applicationConfig = applicationConfig;
+    }
+
+    private boolean isDmaapConfigured() {
+        Properties consumerCfg = applicationConfig.getDmaapConsumerConfig();
+        Properties producerCfg = applicationConfig.getDmaapPublisherConfig();
+        return (consumerCfg != null && consumerCfg.size() > 0 && producerCfg != null && producerCfg.size() > 0);
+    }
+
+    @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());
+                sleep(TIME_BETWEEN_DMAAP_POLLS);
+            }
+        }
+    }
+
+    private Iterable<String> fetchAllMessages() throws ServiceException, IOException {
+        Properties dmaapConsumerProperties = this.applicationConfig.getDmaapConsumerConfig();
+        MRConsumer consumer = getMessageRouterConsumer(dmaapConsumerProperties);
+        MRConsumerResponse response = consumer.fetchWithReturnConsumerResponse();
+        if (response == null || !"200".equals(response.getResponseCode())) {
+            String errorMessage = "DMaaP NULL response received";
+            if (response != null) {
+                errorMessage = "Error respons " + response.getResponseCode() + " " + response.getResponseMessage()
+                    + " from DMaaP.";
+            }
+            throw new ServiceException(errorMessage);
+        } else {
+            logger.debug("DMaaP consumer received {} : {}", response.getResponseCode(), response.getResponseMessage());
+            return response.getActualMessages();
+        }
+    }
+
+    private void processMsg(String msg) throws IOException {
+        logger.debug("Message Reveived from DMAAP : {}", msg);
+        getDmaapMessageHandler().handleDmaapMsg(msg);
+    }
+
+    private DmaapMessageHandler getDmaapMessageHandler() throws IOException {
+        String agentBaseUrl = "http://localhost:" + this.localServerPort;
+        AsyncRestClient agentClient = createRestClient(agentBaseUrl);
+        Properties dmaapPublisherProperties = applicationConfig.getDmaapPublisherConfig();
+        MRBatchingPublisher producer = getMessageRouterPublisher(dmaapPublisherProperties);
+
+        return createDmaapMessageHandler(agentClient, producer);
+    }
+
+    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;
+        }
+    }
+
+    MRConsumer getMessageRouterConsumer(Properties dmaapConsumerProperties) throws FileNotFoundException, IOException {
+        return MRClientFactory.createConsumer(dmaapConsumerProperties);
+    }
+
+    DmaapMessageHandler createDmaapMessageHandler(AsyncRestClient agentClient, MRBatchingPublisher producer) {
+        return new DmaapMessageHandler(producer, agentClient);
+    }
+
+    AsyncRestClient createRestClient(String agentBaseUrl) {
+        return new AsyncRestClient(agentBaseUrl);
+    }
 
+    MRBatchingPublisher getMessageRouterPublisher(Properties dmaapPublisherProperties)
+        throws FileNotFoundException, IOException {
+        return MRClientFactory.createBatchingPublisher(dmaapPublisherProperties);
+    }
 }