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/*-
* ============LICENSE_START=======================================================
* ONAP : APPC
* ================================================================================
* Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Copyright (C) 2017 Amdocs
* ================================================================================
* Modifications Copyright (C) 2018 IBM
* ================================================================================
* 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=========================================================
*/
package org.onap.appc.adapter.messaging.dmaap.impl;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import com.att.nsa.mr.client.MRClientFactory;
import com.att.nsa.mr.client.MRConsumer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Properties;
import org.apache.commons.lang3.StringUtils;
import org.onap.appc.adapter.message.Consumer;
import org.onap.appc.adapter.messaging.dmaap.utils.DmaapUtil;
import org.onap.appc.configuration.Configuration;
import org.onap.appc.configuration.ConfigurationFactory;
import org.onap.appc.metricservice.MetricRegistry;
import org.onap.appc.metricservice.MetricService;
import org.onap.appc.metricservice.metric.DmaapRequestCounterMetric;
import org.onap.appc.metricservice.metric.Metric;
import org.onap.appc.metricservice.metric.MetricType;
import org.onap.appc.metricservice.policy.PublishingPolicy;
import org.onap.appc.metricservice.publisher.LogPublisher;
import org.osgi.framework.BundleContext;
import org.osgi.framework.FrameworkUtil;
import org.osgi.framework.ServiceReference;
public class DmaapConsumerImpl implements Consumer {
private static final EELFLogger LOG = EELFManager.getInstance().getLogger(DmaapConsumerImpl.class);
private final Configuration configuration = ConfigurationFactory.getConfiguration();
// Default values
private static final int DEFAULT_TIMEOUT_MS = 60000;
private static final int DEFAULT_LIMIT = 1000;
private String topic;
private boolean isMetricEnabled = false;
private boolean useHttps = false;
private MetricRegistry metricRegistry;
private MRConsumer client = null;
private Properties props = null;
public DmaapConsumerImpl(Collection<String> urls, String topicName, String consumerGroupName, String consumerId,
String user, String password) {
this(urls, topicName, consumerGroupName, consumerId, user, password, null);
}
public DmaapConsumerImpl(Collection<String> urls, String topicName, String consumerGroupName, String consumerId,
String user, String password, String filter) {
this.topic = topicName;
this.props = new Properties();
String urlsStr = StringUtils.join(urls, ',');
props.setProperty("host", urlsStr);
props.setProperty("group", consumerGroupName);
props.setProperty("id", consumerId);
if (user != null && password != null) {
props.setProperty("username", user);
props.setProperty("password", password);
} else {
props.setProperty("TransportType", "HTTPNOAUTH");
}
if (filter != null) {
props.setProperty("filter", filter);
}
}
private void initMetric() {
LOG.debug("Metric getting initialized");
MetricService metricService = getMetricservice();
if (metricService != null) {
metricRegistry = metricService.createRegistry("APPC");
DmaapRequestCounterMetric dmaapKpiMetric = metricRegistry.metricBuilderFactory()
.dmaapRequestCounterBuilder().withName("DMAAP_KPI").withType(MetricType.COUNTER)
.withRecievedMessage(0).withPublishedMessage(0).build();
if (metricRegistry.register(dmaapKpiMetric)) {
Metric[] metrics = new Metric[] { dmaapKpiMetric };
LogPublisher logPublisher = new LogPublisher(metricRegistry, metrics);
LogPublisher[] logPublishers = new LogPublisher[1];
logPublishers[0] = logPublisher;
PublishingPolicy manuallyScheduledPublishingPolicy = metricRegistry.policyBuilderFactory()
.scheduledPolicyBuilder().withPublishers(logPublishers).withMetrics(metrics).build();
LOG.debug("Policy getting initialized");
manuallyScheduledPublishingPolicy.init();
LOG.debug("Metric initialized");
}
}
}
/**
* @return An instance of MRConsumer created from our class variables.
*/
synchronized MRConsumer getClient(int waitMs, int limit) {
try {
props.setProperty("timeout", String.valueOf(waitMs));
props.setProperty("limit", String.valueOf(limit));
String topicProducerPropFileName = DmaapUtil.createConsumerPropFile(topic, props);
return MRClientFactory.createConsumer(topicProducerPropFileName);
} catch (IOException e1) {
LOG.error("failed to createConsumer", e1);
return null;
}
}
@Override
public synchronized void updateCredentials(String key, String secret) {
LOG.info(String.format("Setting auth to %s for %s", key, this.toString()));
props.setProperty("username", String.valueOf(key));
props.setProperty("password", String.valueOf(secret));
client = null;
}
@Override
public List<String> fetch() {
return fetch(DEFAULT_TIMEOUT_MS, DEFAULT_LIMIT);
}
@Override
public List<String> fetch(int waitMs, int limit) {
Properties properties = configuration.getProperties();
if (properties != null && properties.getProperty("metric.enabled") != null) {
isMetricEnabled = Boolean.valueOf(properties.getProperty("metric.enabled"));
}
if (isMetricEnabled) {
initMetric();
}
LOG.debug(String.format("Fetching up to %d records with %dms wait on %s", limit, waitMs, this.toString()));
List<String> out = new ArrayList<>();
// Create client once and reuse it on subsequent fetches. This is
// to support failover to other servers in the DMaaP cluster.
if (client == null) {
LOG.info("Getting DMaaP Client ...");
client = getClient(waitMs, limit);
}
if (client != null) {
try {
for (String s : client.fetch(waitMs, limit)) {
out.add(s);
incrementReceivedMessage();
}
LOG.debug(String.format("Got %d records from %s", out.size(), this.toString()));
} catch (Exception e) {
// Connection exception
LOG.error(String.format("Dmaap Connection Issue Detected. %s", e.getMessage()), e);
try {
LOG.warn(String.format("Sleeping for %dms to compensate for connection failure", waitMs));
Thread.sleep(waitMs);
} catch (InterruptedException e2) {
LOG.warn(String.format("Failed to wait for %dms after bad fetch", waitMs));
Thread.currentThread().interrupt();
}
}
}
return out;
}
private void incrementReceivedMessage() {
if (isMetricEnabled && metricRegistry != null) {
((DmaapRequestCounterMetric) metricRegistry.metric("DMAAP_KPI")).incrementRecievedMessage();
}
}
/**
* Close consumer Dmaap client.
*/
@Override
public void close() {
LOG.debug("Closing Dmaap consumer client....");
if (client != null) {
client.close();
}
}
@Override
public String toString() {
String hostStr = (props == null || props.getProperty("host") == null ? "N/A" : props.getProperty("host"));
String group = (props == null || props.getProperty("group") == null ? "N/A" : props.getProperty("group"));
String id = (props == null || props.getProperty("id") == null ? "N/A" : props.getProperty("id"));
return String.format("Consumer %s/%s listening to %s on [%s]", group, id, topic, hostStr);
}
@Override
public void useHttps(boolean yes) {
useHttps = yes;
}
private MetricService getMetricservice() {
BundleContext bctx = FrameworkUtil.getBundle(MetricService.class).getBundleContext();
ServiceReference sref = bctx.getServiceReference(MetricService.class.getName());
if (sref != null) {
LOG.info("Metric Service from bundlecontext");
return (MetricService) bctx.getService(sref);
} else {
LOG.info("Metric Service error from bundlecontext");
LOG.warn("Cannot find service reference for org.onap.appc.metricservice.MetricService");
return null;
}
}
public Properties getProperties() {
return props;
}
public boolean isHttps() {
return useHttps;
}
}
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