2 files changed, 228 insertions, 0 deletions
diff --git a/engine-d/src/main/java/org/onap/holmes/dsa/dmaappolling/DMaaPResponseUtil.java b/engine-d/src/main/java/org/onap/holmes/dsa/dmaappolling/DMaaPResponseUtil.java
new file mode 100644
index 0000000..be30153
--- /dev/null
+++ b/engine-d/src/main/java/org/onap/holmes/dsa/dmaappolling/DMaaPResponseUtil.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2017 ZTE Corporation.
+ *
+ * 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.
+ */
+package org.onap.holmes.dsa.dmaappolling;
+
+import com.alibaba.fastjson.JSON;
+import com.alibaba.fastjson.JSONArray;
+import com.alibaba.fastjson.JSONObject;
+import org.jvnet.hk2.annotations.Service;
+import org.onap.holmes.common.api.stat.AlarmAdditionalField;
+import org.onap.holmes.common.api.stat.VesAlarm;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+@Service
+public class DMaaPResponseUtil {
+
+    public VesAlarm convertJsonToVesAlarm(String responseJson) throws IOException {
+        JSONObject jsonNode = JSON.parseObject(responseJson);
+
+        VesAlarm vesAlarm = new VesAlarm();
+
+        JSONObject eventJson = JSON.parseObject(jsonNode.get("event") +"");
+        JSONObject commonEventHeaderJson = JSON.parseObject(eventJson.get("commonEventHeader") +"");
+        convertCommonEventHeaderJsonToEvent(commonEventHeaderJson, vesAlarm);
+
+        JSONObject faultFieldsJson = JSON.parseObject(eventJson.get("faultFields") +"");
+        convertFaultFieldsJsonToEvent(faultFieldsJson, vesAlarm);
+        return vesAlarm;
+    }
+
+    private void convertCommonEventHeaderJsonToEvent(JSONObject commonEventHeaderJson,
+                                                     VesAlarm vesAlarm) {
+        vesAlarm.setDomain((String) commonEventHeaderJson.get("domain"));
+        vesAlarm.setEventId((String) commonEventHeaderJson.get("eventId"));
+        vesAlarm.setEventName((String) commonEventHeaderJson.get("eventName"));
+        vesAlarm.setAlarmIsCleared(vesAlarm.getEventName().endsWith("Cleared") ? 1 : 0);
+        vesAlarm.setEventType(getTextElementByNode(commonEventHeaderJson, "eventType"));
+        vesAlarm.setInternalHeaderFields(
+                getTextElementByNode(commonEventHeaderJson, "internalHeaderFields"));
+        vesAlarm.setLastEpochMicrosec(commonEventHeaderJson.getLong("lastEpochMicrosec"));
+        vesAlarm.setNfcNamingCode(getTextElementByNode(commonEventHeaderJson, "nfcNamingCode"));
+        vesAlarm.setNfNamingCode(getTextElementByNode(commonEventHeaderJson, "nfNamingCode"));
+        vesAlarm.setPriority((String) commonEventHeaderJson.get("priority"));
+        vesAlarm.setReportingEntityId(
+                getTextElementByNode(commonEventHeaderJson, "reportingEntityId"));
+        vesAlarm.setReportingEntityName( (String) commonEventHeaderJson.get("reportingEntityName"));
+        vesAlarm.setSequence((Integer) commonEventHeaderJson.get("sequence"));
+        vesAlarm.setSourceId(getTextElementByNode(commonEventHeaderJson, "sourceId"));
+        vesAlarm.setSourceName( (String) commonEventHeaderJson.get("sourceName"));
+        vesAlarm.setStartEpochMicrosec(commonEventHeaderJson.getLong("startEpochMicrosec"));
+        vesAlarm.setVersion(commonEventHeaderJson.getLong("version"));
+    }
+
+    private void convertFaultFieldsJsonToEvent(JSONObject faultFieldsJson, VesAlarm vesAlarm) {
+        vesAlarm.setAlarmAdditionalInformation(getListElementByNode(faultFieldsJson, "alarmAdditionalInformation"));
+        vesAlarm.setAlarmCondition(faultFieldsJson.getString("alarmCondition"));
+        vesAlarm.setAlarmInterfaceA(getTextElementByNode(faultFieldsJson, "alarmInterfaceA"));
+        vesAlarm.setEventCategory(getTextElementByNode(faultFieldsJson,"eventCategory"));
+        vesAlarm.setEventSeverity(faultFieldsJson.getString("eventSeverity"));
+        vesAlarm.setEventSourceType(faultFieldsJson.getString("eventSourceType"));
+        vesAlarm.setFaultFieldsVersion(faultFieldsJson.getLong("faultFieldsVersion"));
+        vesAlarm.setSpecificProblem(faultFieldsJson.getString("specificProblem"));
+        vesAlarm.setVfStatus(faultFieldsJson.getString("vfStatus"));
+    }
+
+    private String getTextElementByNode(JSONObject jsonNode,String name){
+        if(jsonNode.get(name) != null){
+            return jsonNode.getString(name);
+        }
+        return null;
+    }
+
+    private Long getLongElementByNode(JSONObject jsonNode, String name) {
+        if(jsonNode.get(name) != null){
+            return jsonNode.getLong(name);
+        }
+        return null;
+    }
+
+    private List<AlarmAdditionalField> getListElementByNode(JSONObject jsonNode, String name){
+        List<AlarmAdditionalField> alarms = new ArrayList<AlarmAdditionalField>();
+        if (jsonNode.get(name) != null) {
+            JSONArray alarmAdditionalInformations = jsonNode.getJSONArray(name);
+            for (int i = 0; i < alarmAdditionalInformations.size(); i++) {
+                JSONObject jsonObject = alarmAdditionalInformations.getJSONObject(i);
+                if (jsonObject.get("name") != null
+                        && jsonObject.get("value") != null) {
+                    AlarmAdditionalField field = new AlarmAdditionalField();
+                    field.setName(getTextElementByNode(jsonObject, "name"));
+                    field.setValue(getTextElementByNode(jsonObject, "value"));
+                    alarms.add(field);
+                }
+            }
+        }
+        return alarms;
+    }
+}
diff --git a/engine-d/src/main/java/org/onap/holmes/dsa/dmaappolling/Subscriber.java b/engine-d/src/main/java/org/onap/holmes/dsa/dmaappolling/Subscriber.java
new file mode 100644
index 0000000..160fc38
--- /dev/null
+++ b/engine-d/src/main/java/org/onap/holmes/dsa/dmaappolling/Subscriber.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2017 ZTE Corporation.
+ *
+ * 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.
+ */
+
+package org.onap.holmes.dsa.dmaappolling;
+
+import lombok.Getter;
+import lombok.Setter;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.http.HttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.onap.holmes.common.api.stat.VesAlarm;
+import org.onap.holmes.common.dropwizard.ioc.utils.ServiceLocatorHolder;
+import org.onap.holmes.common.exception.CorrelationException;
+import org.onap.holmes.common.utils.GsonUtil;
+import org.onap.holmes.common.utils.HttpsUtils;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.UUID;
+
+@Getter
+@Setter
+@Slf4j
+public class Subscriber {
+
+    private DMaaPResponseUtil dMaaPResponseUtil = ServiceLocatorHolder.getLocator()
+            .getService(DMaaPResponseUtil.class);
+
+    /**
+     * The number of milliseconds to wait for messages if none are immediately available. This
+     * should normally be used, and set at 15000 or higher.
+     */
+    private int timeout = 15000;
+
+    /**
+     * The maximum number of messages to return
+     */
+    private int limit = 100;
+
+    /**
+     * The number of milliseconds to poll interval time. This should normally be used, and set at
+     * 15000 or higher.
+     */
+    private int period = timeout;
+
+    private boolean secure;
+    private String topic;
+    private String url;
+    private String uuid = UUID.randomUUID() + "";
+    private String consumerGroup = "homlesGroup" + uuid;
+    private String consumer = "homles" + uuid;
+    private String authInfo;
+    private String authExpDate;
+
+    public List<VesAlarm> subscribe() throws CorrelationException {
+        List<String> response;
+        try {
+            response = getDMaaPData();
+        } catch (Exception e) {
+            throw new CorrelationException("Failed to get data from DMaaP.", e);
+        }
+        try {
+            return extractVesAlarm(response);
+        } catch (Exception e) {
+            throw new CorrelationException("Failed to convert the response data to VES alarms.", e);
+        }
+    }
+
+    private List<String> getDMaaPData() throws Exception {
+        String response;
+        CloseableHttpClient closeableHttpClient = null;
+        HttpGet httpGet = new HttpGet(url + "/" + consumerGroup + "/" + consumer + "?timeout=" + period);
+        try {
+            closeableHttpClient = HttpsUtils.getHttpClient(timeout);
+            HttpResponse httpResponse = HttpsUtils
+                    .get(httpGet, new HashMap<>(), closeableHttpClient);
+            response = HttpsUtils.extractResponseEntity(httpResponse);
+        } catch (Exception e) {
+            throw e;
+        } finally {
+            httpGet.releaseConnection();
+            if (closeableHttpClient != null) {
+                try {
+                    closeableHttpClient.close();
+                } catch (IOException e) {
+                    log.warn("Failed to close http client!");
+                }
+            }
+        }
+        return GsonUtil.jsonToBean(response, List.class);
+    }
+
+    private List<VesAlarm> extractVesAlarm(List<String> responseEntity) throws IOException {
+        List<VesAlarm> vesAlarmList = new ArrayList<>();
+        for (String entity : responseEntity) {
+            vesAlarmList.add(dMaaPResponseUtil.convertJsonToVesAlarm(entity));
+        }
+        return vesAlarmList;
+    }
+}