1 files changed, 86 insertions, 0 deletions
diff --git a/engine-d/src/main/java/org/onap/holmes/engine/dcae/ConfigFileScanningTask.java b/engine-d/src/main/java/org/onap/holmes/engine/dcae/ConfigFileScanningTask.java
new file mode 100644
index 0000000..2835a45
--- /dev/null
+++ b/engine-d/src/main/java/org/onap/holmes/engine/dcae/ConfigFileScanningTask.java
@@ -0,0 +1,86 @@
+/**
+ * Copyright 2021 ZTE Corporation.
+ * <p>
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.
+ */
+
+package org.onap.holmes.engine.dcae;
+
+import org.onap.holmes.common.ConfigFileScanner;
+import org.onap.holmes.common.dcae.DcaeConfigurationsCache;
+import org.onap.holmes.common.dcae.entity.DcaeConfigurations;
+import org.onap.holmes.common.dcae.utils.DcaeConfigurationParser;
+import org.onap.holmes.common.dropwizard.ioc.utils.ServiceLocatorHolder;
+import org.onap.holmes.common.exception.CorrelationException;
+import org.onap.holmes.common.utils.Md5Util;
+import org.onap.holmes.dsa.dmaappolling.Subscriber;
+import org.onap.holmes.engine.dmaap.SubscriberAction;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Map;
+
+public class ConfigFileScanningTask implements Runnable {
+    final public static long POLLING_PERIOD = 60L;
+    final private static Logger LOGGER = LoggerFactory.getLogger(ConfigFileScanningTask.class);
+    private String configFile = "/opt/hemtopics/cfy.json";
+    private ConfigFileScanner configFileScanner;
+    private String prevConfigMd5 = Md5Util.md5(null);
+
+    public ConfigFileScanningTask(ConfigFileScanner configFileScanner) {
+        this.configFileScanner = configFileScanner;
+    }
+
+    @Override
+    public void run() {
+        if (null == configFileScanner) {
+            configFileScanner = new ConfigFileScanner();
+        }
+        Map<String, String> newConfig = configFileScanner.scan(configFile);
+        String md5 = Md5Util.md5(newConfig);
+        if (!prevConfigMd5.equals(md5)) {
+            LOGGER.info("Configurations have changed.");
+            prevConfigMd5 = md5;
+        } else {
+            return;
+        }
+
+        for (Map.Entry entry : newConfig.entrySet()) {
+            DcaeConfigurations dcaeConfigurations = null;
+            try {
+                dcaeConfigurations = DcaeConfigurationParser.parse(entry.getValue().toString());
+            } catch (CorrelationException e) {
+                LOGGER.error(e.getMessage(), e);
+            } catch (Exception e) {
+                LOGGER.warn("Failed to deal with the new configurations.", e);
+            }
+
+            if (dcaeConfigurations != null) {
+                DcaeConfigurationsCache.setDcaeConfigurations(dcaeConfigurations);
+                addSubscribers(dcaeConfigurations);
+            }
+        }
+    }
+
+    private void addSubscribers(DcaeConfigurations dcaeConfigurations) {
+        SubscriberAction subscriberAction = ServiceLocatorHolder.getLocator()
+                .getService(SubscriberAction.class);
+        for (String key : dcaeConfigurations.getSubKeys()) {
+            Subscriber subscriber = new Subscriber();
+            subscriber.setTopic(key);
+            subscriber.setUrl(dcaeConfigurations.getSubSecInfo(key).getDmaapInfo()
+                    .getTopicUrl());
+            subscriberAction.addSubscriber(subscriber);
+        }
+    }
+}