1 files changed, 88 insertions, 0 deletions
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
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+++ 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;
+    }
+}