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AggClientConnection.java
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AggClientConnection.java
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/**
* Copyright 2014 Groupon.com
*
* 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 com.arpnetworking.clusteraggregator.client;
import akka.actor.ActorRef;
import akka.actor.Props;
import akka.actor.Terminated;
import akka.actor.UntypedActor;
import akka.io.Tcp;
import akka.io.TcpMessage;
import akka.util.ByteString;
import com.arpnetworking.clusteraggregator.models.CombinedMetricData;
import com.arpnetworking.metrics.aggregation.protocol.Messages;
import com.arpnetworking.steno.Logger;
import com.arpnetworking.steno.LoggerFactory;
import com.arpnetworking.tsdcore.model.AggregatedData;
import com.arpnetworking.tsdcore.model.AggregationMessage;
import com.arpnetworking.tsdcore.model.FQDSN;
import com.arpnetworking.tsdcore.model.PeriodicData;
import com.arpnetworking.tsdcore.statistics.Statistic;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.protobuf.GeneratedMessage;
import scala.concurrent.duration.FiniteDuration;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.time.Duration;
import java.util.Collections;
import java.util.Map;
import java.util.regex.Pattern;
/**
* An actor that handles the data sent from an agg client.
*
* @author Brandon Arp (brandonarp at gmail dot com)
*/
public class AggClientConnection extends UntypedActor {
/**
* Creates a <code>Props</code> for use in Akka.
*
* @param connection Reference to the client connection actor.
* @param remote The address of the client socket.
* @param maxConnectionAge The maximum duration to keep a connection open before cycling it.
* @return A new <code>Props</code>.
*/
public static Props props(final ActorRef connection, final InetSocketAddress remote, final FiniteDuration maxConnectionAge) {
return Props.create(AggClientConnection.class, connection, remote, maxConnectionAge);
}
/**
* Public constructor.
*
* @param connection Reference to the client connection actor.
* @param remote The address of the client socket.
* @param maxConnectionAge The maximum duration to keep a connection open before cycling it.
*/
public AggClientConnection(
final ActorRef connection,
final InetSocketAddress remote,
final FiniteDuration maxConnectionAge) {
_connection = connection;
_remoteAddress = remote;
getContext().watch(connection);
context().system().scheduler().scheduleOnce(
maxConnectionAge,
self(),
TcpMessage.close(),
context().dispatcher(),
self());
}
/**
* {@inheritDoc}
*/
@Override
public void onReceive(final Object message) throws Exception {
if (message instanceof Tcp.Received) {
final Tcp.Received received = (Tcp.Received) message;
final ByteString data = received.data();
LOGGER.trace()
.setMessage("Received a tcp message")
.addData("length", data.length())
.addContext("actor", self())
.log();
_buffer = _buffer.concat(data);
processMessages();
} else if (message instanceof Tcp.CloseCommand) {
LOGGER.debug()
.setMessage("Connection timeout hit, cycling connection")
.addData("remote", _remoteAddress)
.addContext("actor", self())
.log();
if (_connection != null) {
_connection.tell(message, self());
}
} else if (message instanceof Tcp.ConnectionClosed) {
getContext().stop(getSelf());
} else if (message instanceof Terminated) {
final Terminated terminated = (Terminated) message;
LOGGER.info()
.setMessage("Connection actor terminated")
.addData("terminated", terminated.actor())
.addContext("actor", self())
.log();
if (terminated.actor().equals(_connection)) {
getContext().stop(getSelf());
} else {
unhandled(message);
}
} else {
unhandled(message);
}
}
private void processMessages() {
ByteString current = _buffer;
Optional<AggregationMessage> messageOptional = AggregationMessage.deserialize(current);
while (messageOptional.isPresent()) {
final AggregationMessage message = messageOptional.get();
current = current.drop(message.getLength());
final GeneratedMessage gm = message.getMessage();
if (gm instanceof Messages.HostIdentification) {
final Messages.HostIdentification hostIdent = (Messages.HostIdentification) gm;
if (hostIdent.hasHostName()) {
_hostName = Optional.fromNullable(hostIdent.getHostName());
}
if (hostIdent.hasClusterName()) {
_clusterName = Optional.fromNullable(hostIdent.getClusterName());
}
LOGGER.info()
.setMessage("Handshake received")
.addData("host", _hostName.or(""))
.addData("cluster", _clusterName.or(""))
.addContext("actor", self())
.log();
} else if (gm instanceof Messages.StatisticSetRecord) {
final Messages.StatisticSetRecord setRecord = (Messages.StatisticSetRecord) gm;
LOGGER.trace()
.setMessage("StatisticSet record received")
.addData("aggregation", setRecord)
.addContext("actor", self())
.log();
getContext().parent().tell(setRecord, getSelf());
if (setRecord.getStatisticsCount() > 0) {
final Optional<PeriodicData> periodicData = buildPeriodicData(setRecord);
if (periodicData.isPresent()) {
getContext().parent().tell(periodicData.get(), self());
}
}
} else if (gm instanceof Messages.HeartbeatRecord) {
LOGGER.debug()
.setMessage("Heartbeat received")
.addData("host", _hostName.or(""))
.addData("cluster", _clusterName.or(""))
.addContext("actor", self())
.log();
} else {
LOGGER.warn()
.setMessage("Unknown message type")
.addData("type", gm.getClass())
.addContext("actor", self())
.log();
}
messageOptional = AggregationMessage.deserialize(current);
if (!messageOptional.isPresent() && current.length() > 4) {
LOGGER.debug()
.setMessage("buffer did not deserialize completely")
.addData("remainingBytes", current.length())
.addContext("actor", self())
.log();
}
}
//TODO(barp): Investigate using a ring buffer [MAI-196]
_buffer = current;
}
private Optional<PeriodicData> buildPeriodicData(final Messages.StatisticSetRecord setRecord) {
final CombinedMetricData combinedMetricData = CombinedMetricData.Builder.fromStatisticSetRecord(setRecord).build();
final ImmutableList.Builder<AggregatedData> builder = ImmutableList.builder();
final ImmutableMap.Builder<String, String> dimensionBuilder = ImmutableMap.builder();
Optional<String> host = Optional.absent();
Optional<String> service = Optional.absent();
Optional<String> cluster = Optional.absent();
for (final Messages.DimensionEntry dimensionEntry : setRecord.getDimensionsList()) {
if (HOST_KEY.equals(dimensionEntry.getKey())) {
host = Optional.fromNullable(dimensionEntry.getValue());
} else if (SERVICE_KEY.equals(dimensionEntry.getKey())) {
service = Optional.fromNullable(dimensionEntry.getValue());
} else if (CLUSTER_KEY.equals(dimensionEntry.getKey())) {
cluster = Optional.fromNullable(dimensionEntry.getValue());
} else {
dimensionBuilder.put(dimensionEntry.getKey(), dimensionEntry.getValue());
}
}
if (!service.isPresent()) {
service = Optional.fromNullable(setRecord.getService());
}
if (!cluster.isPresent()) {
cluster = Optional.fromNullable(setRecord.getCluster());
if (!cluster.isPresent()) {
cluster = _clusterName;
}
}
if (!host.isPresent()) {
host = _hostName;
}
dimensionBuilder.put(HOST_KEY, host.or(""));
dimensionBuilder.put(SERVICE_KEY, service.or(""));
dimensionBuilder.put(CLUSTER_KEY, cluster.or(""));
if (!(host.isPresent() && service.isPresent() && cluster.isPresent())) {
INCOMPLETE_RECORD_LOGGER.warn()
.setMessage("Cannot process StatisticSet record, missing required fields.")
.addData("host", host)
.addData("service", service)
.addData("cluster", cluster)
.log();
return Optional.absent();
}
final ImmutableMap<String, String> dimensions = dimensionBuilder.build();
for (final Map.Entry<Statistic, CombinedMetricData.StatisticValue> record
: combinedMetricData.getCalculatedValues().entrySet()) {
final AggregatedData aggregatedData = new AggregatedData.Builder()
.setFQDSN(new FQDSN.Builder()
.setCluster(setRecord.getCluster())
.setMetric(setRecord.getMetric())
.setService(setRecord.getService())
.setStatistic(record.getKey())
.build())
.setHost(host.get())
.setIsSpecified(record.getValue().getUserSpecified())
.setPeriod(combinedMetricData.getPeriod())
.setPopulationSize(1L)
.setSamples(Collections.emptyList())
.setStart(combinedMetricData.getPeriodStart())
.setSupportingData(record.getValue().getValue().getData())
.setValue(record.getValue().getValue().getValue())
.build();
builder.add(aggregatedData);
}
return Optional.of(new PeriodicData.Builder()
.setData(builder.build())
.setConditions(ImmutableList.of())
.setDimensions(dimensions)
.setPeriod(combinedMetricData.getPeriod())
.setStart(combinedMetricData.getPeriodStart())
.build());
}
private Optional<String> _hostName = Optional.absent();
private Optional<String> _clusterName = Optional.absent();
private ByteString _buffer = ByteString.empty();
private final ActorRef _connection;
private final InetSocketAddress _remoteAddress;
private static final Logger LOGGER = LoggerFactory.getLogger(AggClientConnection.class);
private static final Logger INCOMPLETE_RECORD_LOGGER = LoggerFactory.getRateLimitLogger(
AggClientConnection.class,
Duration.ofSeconds(30));
private static final boolean IS_ENABLED;
private static final String HOST_KEY = "host";
private static final String SERVICE_KEY = "service";
private static final String CLUSTER_KEY = "cluster";
static {
// Determine the local host name
String localHost = "UNKNOWN";
try {
localHost = InetAddress.getLocalHost().getCanonicalHostName();
LOGGER.info(String.format("Determined local host name as: %s", localHost));
} catch (final UnknownHostException e) {
LOGGER.warn("Unable to determine local host name", e);
}
// Determine if the host name is enabled
IS_ENABLED = Pattern.matches(".*\\.lup1$", localHost) || Pattern.matches(".*\\.snc1$", localHost);
LOGGER.info(String.format("Cluster aggregator will be %s", IS_ENABLED ? "ENABLED" : "DISABLED"));
}
}