1 files changed, 167 insertions, 0 deletions
diff --git a/src/main/java/org/onap/dmaap/dmf/mr/metrics/publisher/impl/DMaaPCambriaConsumerImpl.java b/src/main/java/org/onap/dmaap/dmf/mr/metrics/publisher/impl/DMaaPCambriaConsumerImpl.java
new file mode 100644
index 0000000..75dab74
--- /dev/null
+++ b/src/main/java/org/onap/dmaap/dmf/mr/metrics/publisher/impl/DMaaPCambriaConsumerImpl.java
@@ -0,0 +1,167 @@
+/*******************************************************************************
+ *  ============LICENSE_START=======================================================
+ *  org.onap.dmaap
+ *  ================================================================================
+ *  Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ *  ================================================================================
+ *  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.
+ *  ============LICENSE_END=========================================================
+ *  
+ *  ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ *  
+ *******************************************************************************/
+package org.onap.dmaap.dmf.mr.metrics.publisher.impl;
+
+import com.att.nsa.apiClient.http.HttpException;
+import com.att.nsa.apiClient.http.HttpObjectNotFoundException;
+import jline.internal.Log;
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.onap.dmaap.dmf.mr.metrics.publisher.CambriaPublisherUtility;
+
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.MalformedURLException;
+import java.net.URLEncoder;
+import java.util.Collection;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * 
+ * @author anowarul.islam
+ *
+ */
+public class DMaaPCambriaConsumerImpl extends CambriaBaseClient
+		implements org.onap.dmaap.dmf.mr.metrics.publisher.CambriaConsumer {
+	private final String fTopic;
+	private final String fGroup;
+	private final String fId;
+	private final int fTimeoutMs;
+	private final int fLimit;
+	private final String fFilter;
+
+	/**
+	 * 
+	 * @param hostPart
+	 * @param topic
+	 * @param consumerGroup
+	 * @param consumerId
+	 * @param timeoutMs
+	 * @param limit
+	 * @param filter
+	 * @param apiKey
+	 * @param apiSecret
+	 */
+	public DMaaPCambriaConsumerImpl(Collection<String> hostPart, final String topic, final String consumerGroup,
+			final String consumerId, int timeoutMs, int limit, String filter, String apiKey, String apiSecret) throws MalformedURLException {
+		super(hostPart, topic + "::" + consumerGroup + "::" + consumerId);
+
+		fTopic = topic;
+		fGroup = consumerGroup;
+		fId = consumerId;
+		fTimeoutMs = timeoutMs;
+		fLimit = limit;
+		fFilter = filter;
+
+		setApiCredentials(apiKey, apiSecret);
+	}
+
+	/**
+	 * method converts String to list
+	 * 
+	 * @param str
+	 * @return
+	 */
+	public static List<String> stringToList(String str) {
+		final LinkedList<String> set = new LinkedList<String>();
+		if (str != null) {
+			final String[] parts = str.trim().split(",");
+			for (String part : parts) {
+				final String trimmed = part.trim();
+				if (trimmed.length() > 0) {
+					set.add(trimmed);
+				}
+			}
+		}
+		return set;
+	}
+
+	@Override
+	public Iterable<String> fetch() throws IOException {
+		// fetch with the timeout and limit set in constructor
+		return fetch(fTimeoutMs, fLimit);
+	}
+
+	@Override
+	public Iterable<String> fetch(int timeoutMs, int limit) throws IOException {
+		final LinkedList<String> msgs = new LinkedList<String>();
+
+		final String urlPath = createUrlPath(timeoutMs, limit);
+
+		getLog().info("UEB GET " + urlPath);
+		try {
+			final JSONObject o = get(urlPath);
+
+			if (o != null) {
+				final JSONArray a = o.getJSONArray("result");
+				if (a != null) {
+					for (int i = 0; i < a.length(); i++) {
+						msgs.add(a.getString(i));
+					}
+				}
+			}
+		} catch (HttpObjectNotFoundException e) {
+			// this can happen if the topic is not yet created. ignore.
+			Log.error("Failed due to topic is not yet created" + e);
+		} catch (JSONException e) {
+			// unexpected response
+			reportProblemWithResponse();
+			Log.error("Failed due to jsonException", e);
+		} catch (HttpException e) {
+			throw new IOException(e);
+		}
+
+		return msgs;
+	}
+
+	public String createUrlPath(int timeoutMs, int limit) {
+		final StringBuilder url = new StringBuilder(CambriaPublisherUtility.makeConsumerUrl(fTopic, fGroup, fId));
+		final StringBuilder adds = new StringBuilder();
+		if (timeoutMs > -1) {
+			adds.append("timeout=").append(timeoutMs);
+		}
+
+		if (limit > -1) {
+			if (adds.length() > 0) {
+				adds.append("&");
+			}
+			adds.append("limit=").append(limit);
+		}
+		if (fFilter != null && fFilter.length() > 0) {
+			try {
+				if (adds.length() > 0) {
+					adds.append("&");
+				}
+				adds.append("filter=").append(URLEncoder.encode(fFilter, "UTF-8"));
+			} catch (UnsupportedEncodingException e) {
+				Log.error("Failed due to UnsupportedEncodingException" + e);
+			}
+		}
+		if (adds.length() > 0) {
+			url.append("?").append(adds.toString());
+		}
+		return url.toString();
+	}
+
+}