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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 com.att.nsa.cambria.beans;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Properties;
import java.util.concurrent.TimeUnit;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.recipes.locks.InterProcessMutex;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import org.springframework.beans.factory.annotation.Qualifier;
import com.att.nsa.cambria.backends.Consumer;
import com.att.nsa.cambria.backends.ConsumerFactory;
import com.att.nsa.cambria.backends.MetricsSet;
import com.att.nsa.cambria.backends.kafka.KafkaConsumer;
import com.att.nsa.cambria.backends.kafka.KafkaConsumerCache;
import com.att.nsa.cambria.backends.kafka.KafkaConsumerCache.KafkaConsumerCacheException;
import com.att.nsa.cambria.constants.CambriaConstants;
import com.att.nsa.cambria.utils.ConfigurationReader;
import com.att.nsa.drumlin.till.nv.rrNvReadable;
import com.att.nsa.drumlin.till.nv.rrNvReadable.missingReqdSetting;
import com.att.ajsc.filemonitor.AJSCPropertiesMap;
import kafka.consumer.ConsumerConfig;
import kafka.javaapi.consumer.ConsumerConnector;
/**
* @author author
*
*/
public class DMaaPKafkaConsumerFactory implements ConsumerFactory {
//private static final Logger log = LoggerFactory .getLogger(DMaaPKafkaConsumerFactory.class);
private static final EELFLogger log = EELFManager.getInstance().getLogger(DMaaPKafkaConsumerFactory.class);
/**
* constructor initialization
*
* @param settings
* @param metrics
* @param curator
* @throws missingReqdSetting
* @throws KafkaConsumerCacheException
* @throws UnknownHostException
*/
public DMaaPKafkaConsumerFactory(
@Qualifier("propertyReader") rrNvReadable settings,
@Qualifier("dMaaPMetricsSet") MetricsSet metrics,
@Qualifier("curator") CuratorFramework curator)
throws missingReqdSetting, KafkaConsumerCacheException,
UnknownHostException {
/*final String apiNodeId = settings.getString(
CambriaConstants.kSetting_ApiNodeIdentifier,
InetAddress.getLocalHost().getCanonicalHostName()
+ ":"
+ settings.getInt(CambriaConstants.kSetting_Port,
CambriaConstants.kDefault_Port));*/
String apiNodeId = AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop,
CambriaConstants.kSetting_ApiNodeIdentifier);
if (apiNodeId == null){
apiNodeId=InetAddress.getLocalHost().getCanonicalHostName()
+ ":"
+ settings.getInt(CambriaConstants.kSetting_Port,
CambriaConstants.kDefault_Port);
}
log.info("This Cambria API Node identifies itself as [" + apiNodeId
+ "].");
final String mode = CambriaConstants.DMAAP;
/*fSettings = settings;
fZooKeeper = fSettings.getString(kSettings_KafkaZookeeper, settings
.getString(CambriaConstants.kSetting_ZkConfigDbServers,
CambriaConstants.kDefault_ZkConfigDbServers));*/
String strkSettings_KafkaZookeeper = AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop,kSettings_KafkaZookeeper);
if(null==strkSettings_KafkaZookeeper){
strkSettings_KafkaZookeeper = AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop,CambriaConstants.kSetting_ZkConfigDbServers);
if (null==strkSettings_KafkaZookeeper) strkSettings_KafkaZookeeper = CambriaConstants.kDefault_ZkConfigDbServers;
}
fZooKeeper= strkSettings_KafkaZookeeper;
//final boolean isCacheEnabled = fSettings.getBoolean(
// kSetting_EnableCache, kDefault_IsCacheEnabled);
boolean kSetting_EnableCache= kDefault_IsCacheEnabled;
String strkSetting_EnableCache = AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop,kSetting_EnableCache+"");
if(null!=strkSetting_EnableCache)kSetting_EnableCache=Boolean.parseBoolean(strkSetting_EnableCache);
final boolean isCacheEnabled = kSetting_EnableCache;
fCache = (isCacheEnabled) ? new KafkaConsumerCache(apiNodeId,
metrics) : null;
if (fCache != null) {
fCache.startCache(mode, curator);
}
}
@Override
public Consumer getConsumerFor(String topic, String consumerGroupName,
String consumerId, int timeoutMs) throws UnavailableException {
KafkaConsumer kc;
try {
kc = (fCache != null) ? fCache.getConsumerFor(topic,
consumerGroupName, consumerId) : null;
} catch (KafkaConsumerCacheException e) {
throw new UnavailableException(e);
}
if (kc == null) {
final InterProcessMutex ipLock = new InterProcessMutex( ConfigurationReader.getCurator(), "/consumerFactory/" + topic + "/" + consumerGroupName + "/" + consumerId);
// final InterProcessMutex fLock = new InterProcessMutex(
// ConfigurationReader.getCurator(), "/consumerFactory/"
// + topic + "/" + consumerGroupName + "/"
// + consumerId);
boolean locked = false;
try {
locked = ipLock.acquire(30, TimeUnit.SECONDS);
if (!locked) {
// FIXME: this seems to cause trouble in some cases. This exception
// gets thrown routinely. Possibly a consumer trying multiple servers
// at once, producing a never-ending cycle of overlapping locks?
// The problem is that it throws and winds up sending a 503 to the
// client, which would be incorrect if the client is causing trouble
// by switching back and forth.
throw new UnavailableException("Could not acquire lock in order to create (topic, group, consumer) = " + "(" + topic + ", " + consumerGroupName + ", " + consumerId + ")");
}
// if (!fLock.acquire(30, TimeUnit.SECONDS)) {
// throw new UnavailableException(
// "Could not acquire lock in order to create (topic, group, consumer) = "
// + "(" + topic + ", " + consumerGroupName
// + ", " + consumerId + ")");
// }
fCache.signalOwnership(topic, consumerGroupName, consumerId);
log.info("Creating Kafka consumer for group ["
+ consumerGroupName + "], consumer [" + consumerId
+ "], on topic [" + topic + "].");
final String fakeGroupName = consumerGroupName + "--" + topic;
final ConsumerConfig ccc = createConsumerConfig(fakeGroupName,
consumerId);
final ConsumerConnector cc = kafka.consumer.Consumer
.createJavaConsumerConnector(ccc);
kc = new KafkaConsumer(topic, consumerGroupName, consumerId, cc);
if (fCache != null) {
fCache.putConsumerFor(topic, consumerGroupName, consumerId,
kc);
}
} catch (org.I0Itec.zkclient.exception.ZkTimeoutException x) {
log.error("Exception find at getConsumerFor(String topic, String consumerGroupName,\r\n" +
" String consumerId, int timeoutMs) : " + x);
throw new UnavailableException("Couldn't connect to ZK.");
} catch (KafkaConsumerCacheException e) {
log.warn("Failed to cache consumer (this may have performance implications): "
+ e.getMessage());
} catch (Exception e) {
throw new UnavailableException(
"Error while acquiring consumer factory lock", e);
} finally {
if ( locked )
{
try {
ipLock.release();
} catch (Exception e) {
throw new UnavailableException("Error while releasing consumer factory lock", e);
}
}
}
}
return kc;
}
@Override
public synchronized void destroyConsumer(String topic,
String consumerGroup, String clientId) {
if (fCache != null) {
fCache.dropConsumer(topic, consumerGroup, clientId);
}
}
@Override
public synchronized Collection<? extends Consumer> getConsumers() {
return fCache.getConsumers();
}
@Override
public synchronized void dropCache() {
fCache.dropAllConsumers();
}
private ConsumerConfig createConsumerConfig(String groupId,
String consumerId) {
final Properties props = new Properties();
props.put("zookeeper.connect", fZooKeeper);
props.put("group.id", groupId);
props.put("consumer.id", consumerId);
//props.put("auto.commit.enable", "false");
// additional settings: start with our defaults, then pull in configured
// overrides
props.putAll(KafkaInternalDefaults);
for (String key : KafkaConsumerKeys) {
transferSettingIfProvided(props, key, "kafka");
}
return new ConsumerConfig(props);
}
//private final rrNvReadable fSettings;
private final KafkaConsumerCache fCache;
private String fZooKeeper;
private static final String kSettings_KafkaZookeeper = "kafka.client.zookeeper";
private static final HashMap<String, String> KafkaInternalDefaults = new HashMap<String, String>();
/**
* putting values in hashmap like consumer timeout, zookeeper time out, etc
*
* @param setting
*/
public static void populateKafkaInternalDefaultsMap() {
//@Qualifier("propertyReader") rrNvReadable setting) {
try {
HashMap<String, String> map1= com.att.ajsc.filemonitor.AJSCPropertiesMap.getProperties(CambriaConstants.msgRtr_prop);
KafkaInternalDefaults.put("consumer.timeout.ms",
// AJSCPropertiesMap.get(CambriaConstants.msgRtr_prop, "consumer.timeout.ms"));
map1.get( "consumer.timeout.ms"));
KafkaInternalDefaults.put("zookeeper.connection.timeout.ms",
//AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop, "zookeeper.connection.timeout.ms"));
map1.get("zookeeper.connection.timeout.ms"));
KafkaInternalDefaults.put("zookeeper.session.timeout.ms",
//AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop, "zookeeper.session.timeout.ms"));
map1.get("zookeeper.session.timeout.ms"));
KafkaInternalDefaults.put("zookeeper.sync.time.ms",
// AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop, "zookeeper.sync.time.ms"));
map1.get( "zookeeper.sync.time.ms"));
KafkaInternalDefaults.put("auto.commit.interval.ms",
//AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop, "auto.commit.interval.ms"));
map1.get( "auto.commit.interval.ms"));
KafkaInternalDefaults.put("fetch.message.max.bytes",
//AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop, "fetch.message.max.bytes"));
map1.get("fetch.message.max.bytes"));
KafkaInternalDefaults.put("auto.commit.enable",
// AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop, "auto.commit.enable"));
map1.get("auto.commit.enable"));
} catch (Exception e) {
log.error("Failed to load Kafka Internal Properties.", e);
}
}
private static final String KafkaConsumerKeys[] = { "socket.timeout.ms",
"socket.receive.buffer.bytes", "fetch.message.max.bytes",
"auto.commit.interval.ms", "queued.max.message.chunks",
"rebalance.max.retries", "fetch.min.bytes", "fetch.wait.max.bytes",
"rebalance.backoff.ms", "refresh.leader.backoff.ms",
"auto.offset.reset", "consumer.timeout.ms",
"zookeeper.session.timeout.ms", "zookeeper.connection.timeout.ms",
"zookeeper.sync.time.ms" };
private static String makeLongKey(String key, String prefix) {
return prefix + "." + key;
}
private void transferSettingIfProvided(Properties target, String key,
String prefix) {
String keyVal= AJSCPropertiesMap.getProperty(CambriaConstants.msgRtr_prop,makeLongKey(key, prefix));
// if (fSettings.hasValueFor(makeLongKey(key, prefix))) {
if (null!=keyVal) {
// final String val = fSettings
// .getString(makeLongKey(key, prefix), "");
log.info("Setting [" + key + "] to " + keyVal + ".");
target.put(key, keyVal);
}
}
}
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