Add dmaap response convert

Issue-ID: HOLMES-29

Change-Id: Ie5f7c772db16ed8b9568105310783c9a734fe478
Signed-off-by: Shiwei Tian <tian.shiwei@zte.com.cn>

2 files changed, 198 insertions, 0 deletions

diff --git a/dmaap-dsa/src/main/java/org/onap/holmes/dsa/dmaappolling/DMaaPResponseUtil.java b/dmaap-dsa/src/main/java/org/onap/holmes/dsa/dmaappolling/DMaaPResponseUtil.java
new file mode 100644
index 0000000..72b76c1
--- /dev/null
+++ b/dmaap-dsa/src/main/java/org/onap/holmes/dsa/dmaappolling/DMaaPResponseUtil.java
@@ -0,0 +1,110 @@
+/*
+ * 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.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import org.jvnet.hk2.annotations.Service;
+import org.onap.holmes.common.api.stat.AlarmAdditionalField;
+import org.onap.holmes.common.api.stat.VesAlarm;
+
+@Service
+public class DMaaPResponseUtil {
+
+    public VesAlarm convertJsonToVesAlarm(String responseJson) throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+        JsonNode jsonNode = mapper.readTree(responseJson);
+        VesAlarm vesAlarm = new VesAlarm();
+
+        JsonNode eventJson = jsonNode.get("event");
+
+        JsonNode commonEventHeaderJson = eventJson.get("commonEventHeader");
+        convertCommonEventHeaderJsonToEvent(commonEventHeaderJson, vesAlarm);
+
+        JsonNode faultFieldsJson = eventJson.get("faultFields");
+        convertFaultFieldsJsonToEvent(faultFieldsJson, vesAlarm);
+        return vesAlarm;
+    }
+
+    private void convertCommonEventHeaderJsonToEvent(JsonNode commonEventHeaderJson,
+            VesAlarm vesAlarm) {
+        vesAlarm.setDomain(commonEventHeaderJson.get("domain").asText());
+        vesAlarm.setEventId(commonEventHeaderJson.get("eventId").asText());
+        vesAlarm.setEventName(commonEventHeaderJson.get("eventName").asText());
+        vesAlarm.setEventType(getTextElementByNode(commonEventHeaderJson, "eventType"));
+        vesAlarm.setInternalHeaderFields(
+                getTextElementByNode(commonEventHeaderJson, "internalHeaderFields"));
+        vesAlarm.setLastEpochMicrosec(commonEventHeaderJson.get("lastEpochMicfrosec").asLong());
+        vesAlarm.setNfcNamingCode(getTextElementByNode(commonEventHeaderJson, "nfcNamingCode"));
+        vesAlarm.setNfNamingCode(getTextElementByNode(commonEventHeaderJson, "nfNamingCode"));
+        vesAlarm.setPriority(commonEventHeaderJson.get("priority").asText());
+        vesAlarm.setReportingEntityId(
+                getTextElementByNode(commonEventHeaderJson, "reportingEntityId"));
+        vesAlarm.setReportingEntityName(commonEventHeaderJson.get("reprotingEntityName").asText());
+        vesAlarm.setSequence(commonEventHeaderJson.get("sequence").asInt());
+        vesAlarm.setSourceId(getTextElementByNode(commonEventHeaderJson, "sourceId"));
+        vesAlarm.setSourceName(commonEventHeaderJson.get("sourceName").asText());
+        vesAlarm.setStartEpochMicrosec(commonEventHeaderJson.get("startEpochMicrosec").asLong());
+        vesAlarm.setVersion(commonEventHeaderJson.get("version").asLong());
+    }
+
+    private void convertFaultFieldsJsonToEvent(JsonNode faultFieldsJson, VesAlarm vesAlarm) {
+        vesAlarm.setAlarmAdditionalInformation(getListElementByNode(faultFieldsJson, "alarmAdditionalInformation"));
+        vesAlarm.setAlarmCondition(faultFieldsJson.get("alarmCondition").asText());
+        vesAlarm.setAlarmInterfaceA(getTextElementByNode(faultFieldsJson, "alarmInterfaceA"));
+        vesAlarm.setEventCategory(getTextElementByNode(faultFieldsJson,"eventCategory"));
+        vesAlarm.setEventSeverity(faultFieldsJson.get("eventSeverity").asText());
+        vesAlarm.setEventSourceType(faultFieldsJson.get("eventSourceType").asText());
+        vesAlarm.setFaultFieldsVersion(faultFieldsJson.get("faultFieldsVersion").asLong());
+        vesAlarm.setSpecificProblem(faultFieldsJson.get("specificProblem").asText());
+        vesAlarm.setVfStatus(faultFieldsJson.get("vfStatus").asText());
+    }
+
+    private String getTextElementByNode(JsonNode jsonNode,String name){
+        if(jsonNode.has(name)){
+            return jsonNode.get(name).asText();
+        }
+        return null;
+    }
+
+    private Long getLongElementByNode(JsonNode jsonNode, String name) {
+        if(jsonNode.has(name)){
+            return jsonNode.get(name).asLong();
+        }
+        return null;
+    }
+
+    private List<AlarmAdditionalField> getListElementByNode(JsonNode jsonNode, String name){
+        List<AlarmAdditionalField> alarms = new ArrayList<AlarmAdditionalField>();
+        if (jsonNode.has(name)) {
+            JsonNode alarmAdditionalInformations = jsonNode.get(name);
+            if (alarmAdditionalInformations.isArray()) {
+                alarmAdditionalInformations.forEach(alarm -> {
+                    if(alarm.has("name") && alarm.has("value")) {
+                        AlarmAdditionalField field = new AlarmAdditionalField();
+                        field.setName(getTextElementByNode(alarm, "name"));
+                        field.setName(getTextElementByNode(alarm, "value"));
+                        alarms.add(field);
+                    }
+                });
+            }
+        }
+        return alarms;
+    }
+}
diff --git a/dmaap-dsa/src/main/java/org/onap/holmes/dsa/dmaappolling/Subscriber.java b/dmaap-dsa/src/main/java/org/onap/holmes/dsa/dmaappolling/Subscriber.java
new file mode 100644
index 0000000..3563b66
--- /dev/null
+++ b/dmaap-dsa/src/main/java/org/onap/holmes/dsa/dmaappolling/Subscriber.java
@@ -0,0 +1,88 @@
+/*
+ * 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 java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import javax.inject.Inject;
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.core.Response;
+import lombok.Getter;
+import lombok.Setter;
+import org.glassfish.jersey.client.ClientConfig;
+import org.onap.holmes.common.api.stat.VesAlarm;
+import org.onap.holmes.common.exception.CorrelationException;
+
+@Getter
+@Setter
+public class Subscriber {
+
+    @Inject
+    private DMaaPResponseUtil dMaaPResponseUtil;
+
+    /**
+     * 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 = 15000;
+
+    private boolean secure;
+    private String topic;
+    private String url;
+    private String consumerGroup = "g0";
+    private String consumer = "u1";
+    private String authInfo;
+    private String authExpDate;
+
+    public List<VesAlarm> subscribe() throws CorrelationException {
+        List<String> response = getDMaaPData();
+        try {
+            return extractVesAlarm(response);
+        } catch (Exception e) {
+            throw new CorrelationException("Failed to convert the response data to VES alarms.", e);
+        }
+    }
+
+    private List<String> getDMaaPData() {
+        Client client = ClientBuilder.newClient(new ClientConfig());
+        WebTarget webTarget = client.target(url);
+        Response response = webTarget.path(topic).path(consumerGroup).path(consumer).request().get();
+        return response.readEntity(List.class);
+    }
+
+    List<VesAlarm> extractVesAlarm(List<String> responseEntity) throws IOException {
+        List<VesAlarm> vesAlarmList = new ArrayList<>();
+        for (String entity : responseEntity) {
+            vesAlarmList.add(dMaaPResponseUtil.convertJsonToVesAlarm(entity));
+        }
+        return vesAlarmList;
+    }
+}