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/*******************************************************************************
* ============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 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;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.onap.dmaap.dmf.mr.metrics.publisher.CambriaPublisherUtility;
import com.att.nsa.apiClient.http.HttpException;
import com.att.nsa.apiClient.http.HttpObjectNotFoundException;
import jline.internal.Log;
/**
*
* @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();
}
}
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