Contrib Extension for Ambari Metrics Emitter (#3767)

* Contrib Extension for Ambari Metrics Emitter

extension to enable druid to send metrics to ambari metrics server
(https://cwiki.apache.org/confluence/display/AMBARI/Metrics)

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switch to public repo

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* add docs

* fix pom version

* Add link for doc page in extensions.md

* remove unused imports

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This commit is contained in:
Nishant 2016-12-20 00:42:47 +05:30 committed by Slim
parent 35160e5595
commit f576a0ff14
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---
layout: doc_page
---
# Ambari Metrics Emitter
To use this extension, make sure to [include](../../operations/including-extensions.html) `ambari-metrics-emitter` extension.
## Introduction
This extension emits druid metrics to a ambari-metrics carbon server.
Events are sent after been [pickled](http://ambari-metrics.readthedocs.org/en/latest/feeding-carbon.html#the-pickle-protocol); the size of the batch is configurable.
## Configuration
All the configuration parameters for ambari-metrics emitter are under `druid.emitter.ambari-metrics`.
|property|description|required?|default|
|--------|-----------|---------|-------|
|`druid.emitter.ambari-metrics.hostname`|The hostname of the ambari-metrics server.|yes|none|
|`druid.emitter.ambari-metrics.port`|The port of the ambari-metrics server.|yes|none|
|`druid.emitter.ambari-metrics.protocol`|The protocol used to send metrics to ambari metrics collector. One of http/https|no|http|
|`druid.emitter.ambari-metrics.trustStorePath`|Path to trustStore to be used for https|no|none|
|`druid.emitter.ambari-metrics.trustStoreType`|trustStore type to be used for https|no|none|
|`druid.emitter.ambari-metrics.trustStoreType`|trustStore password to be used for https|no|none|
|`druid.emitter.ambari-metrics.batchSize`|Number of events to send as one batch.|no|100|
|`druid.emitter.ambari-metrics.eventConverter`| Filter and converter of druid events to ambari-metrics timeline event(please see next section). |yes|none|
|`druid.emitter.ambari-metrics.flushPeriod` | Queue flushing period in milliseconds. |no|1 minute|
|`druid.emitter.ambari-metrics.maxQueueSize`| Maximum size of the queue used to buffer events. |no|`MAX_INT`|
|`druid.emitter.ambari-metrics.alertEmitters`| List of emitters where alerts will be forwarded to. |no| empty list (no forwarding)|
|`druid.emitter.ambari-metrics.emitWaitTime` | wait time in milliseconds to try to send the event otherwise emitter will throwing event. |no|0|
|`druid.emitter.ambari-metrics.waitForEventTime` | waiting time in milliseconds if necessary for an event to become available. |no|1000 (1 sec)|
### Druid to Ambari Metrics Timeline Event Converter
Ambari Metrics Timeline Event Converter defines a mapping between druid metrics name plus dimensions to a timeline event metricName.
ambari-metrics metric path is organized using the following schema:
`<namespacePrefix>.[<druid service name>].[<druid hostname>].<druid metrics dimensions>.<druid metrics name>`
Properly naming the metrics is critical to avoid conflicts, confusing data and potentially wrong interpretation later on.
Example `druid.historical.hist-host1:8080.MyDataSourceName.GroupBy.query/time`:
* `druid` -> namespace prefix
* `historical` -> service name
* `hist-host1:8080` -> druid hostname
* `MyDataSourceName` -> dimension value
* `GroupBy` -> dimension value
* `query/time` -> metric name
We have two different implementation of event converter:
#### Send-All converter
The first implementation called `all`, will send all the druid service metrics events.
The path will be in the form `<namespacePrefix>.[<druid service name>].[<druid hostname>].<dimensions values ordered by dimension's name>.<metric>`
User has control of `<namespacePrefix>.[<druid service name>].[<druid hostname>].`
```json
druid.emitter.ambari-metrics.eventConverter={"type":"all", "namespacePrefix": "druid.test", "appName":"druid"}
```
#### White-list based converter
The second implementation called `whiteList`, will send only the white listed metrics and dimensions.
Same as for the `all` converter user has control of `<namespacePrefix>.[<druid service name>].[<druid hostname>].`
White-list based converter comes with the following default white list map located under resources in `./src/main/resources/defaultWhiteListMap.json`
Although user can override the default white list map by supplying a property called `mapPath`.
This property is a String containing the path for the file containing **white list map Json object**.
For example the following converter will read the map from the file `/pathPrefix/fileName.json`.
```json
druid.emitter.ambari-metrics.eventConverter={"type":"whiteList", "namespacePrefix": "druid.test", "ignoreHostname":true, "appName":"druid", "mapPath":"/pathPrefix/fileName.json"}
```
**Druid emits a huge number of metrics we highly recommend to use the `whiteList` converter**

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|Name|Description|Docs|
|----|-----------|----|
|ambari-metrics-emitter|Ambari Metrics Emitter |[link](../development/extensions-contrib/ambari-metrics-emitter.html)|
|druid-azure-extensions|Microsoft Azure deep storage.|[link](../development/extensions-contrib/azure.html)|
|druid-cassandra-storage|Apache Cassandra deep storage.|[link](../development/extensions-contrib/cassandra.html)|
|druid-cloudfiles-extensions|Rackspace Cloudfiles deep storage and firehose.|[link](../development/extensions-contrib/cloudfiles.html)|

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<?xml version="1.0" encoding="UTF-8"?>
<!--
~ Licensed to Metamarkets Group Inc. (Metamarkets) under one
~ or more contributor license agreements. See the NOTICE file
~ distributed with this work for additional information
~ regarding copyright ownership. Metamarkets licenses this file
~ to you 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.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>io.druid</groupId>
<artifactId>druid</artifactId>
<version>0.9.3-SNAPSHOT</version>
<relativePath>../../pom.xml</relativePath>
</parent>
<groupId>io.druid.extensions.contrib</groupId>
<artifactId>ambari-metrics-emitter</artifactId>
<name>ambari-metrics-emitter</name>
<description>Druid emitter extension to support ambari metrics server</description>
<dependencies>
<dependency>
<groupId>io.druid</groupId>
<artifactId>druid-common</artifactId>
<version>${project.parent.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>io.druid</groupId>
<artifactId>druid-api</artifactId>
<version>${project.parent.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.metamx</groupId>
<artifactId>emitter</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>io.druid</groupId>
<artifactId>druid-server</artifactId>
<version>${project.parent.version}</version>
<type>test-jar</type>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.ambari</groupId>
<artifactId>ambari-metrics-common</artifactId>
<version>2.4.1.0.22</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.easymock</groupId>
<artifactId>easymock</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>pl.pragmatists</groupId>
<artifactId>JUnitParams</artifactId>
<version>1.0.4</version>
<scope>test</scope>
</dependency>
</dependencies>
<repositories>
<repository>
<id>hortonworks</id>
<name>hortonworks</name>
<url>http://repo.hortonworks.com/content/repositories/releases</url>
</repository>
</repositories>
</project>

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/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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 io.druid.emitter.ambari.metrics;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
import com.metamx.common.ISE;
import com.metamx.common.logger.Logger;
import com.metamx.emitter.core.Emitter;
import com.metamx.emitter.core.Event;
import com.metamx.emitter.service.AlertEvent;
import com.metamx.emitter.service.ServiceMetricEvent;
import org.apache.hadoop.metrics2.sink.timeline.AbstractTimelineMetricsSink;
import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
import org.apache.hadoop.metrics2.sink.timeline.TimelineMetrics;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import java.util.regex.Pattern;
public class AmbariMetricsEmitter extends AbstractTimelineMetricsSink implements Emitter
{
private static final Logger log = new Logger(AmbariMetricsEmitter.class);
private final DruidToTimelineMetricConverter timelineMetricConverter;
private final List<Emitter> emitterList;
private final AtomicBoolean started = new AtomicBoolean(false);
private final LinkedBlockingQueue<TimelineMetric> eventsQueue;
private final AmbariMetricsEmitterConfig config;
private final String collectorURI;
private static final long DEFAULT_FLUSH_TIMEOUT_MILLIS = 60000; // default flush wait 1 min
private final ScheduledExecutorService exec = Executors.newScheduledThreadPool(2, new ThreadFactoryBuilder()
.setDaemon(true)
.setNameFormat("AmbariMetricsEmitter-%s")
.build()); // Thread pool of two in order to schedule flush runnable
private final AtomicLong countLostEvents = new AtomicLong(0);
public AmbariMetricsEmitter(
AmbariMetricsEmitterConfig config,
List<Emitter> emitterList
)
{
this.config = config;
this.emitterList = emitterList;
this.timelineMetricConverter = config.getDruidToTimelineEventConverter();
this.eventsQueue = new LinkedBlockingQueue<>(config.getMaxQueueSize());
this.collectorURI = String.format(
"%s://%s:%s%s",
config.getProtocol(),
config.getHostname(),
config.getPort(),
WS_V1_TIMELINE_METRICS
);
}
@Override
public void start()
{
synchronized (started) {
log.info("Starting Ambari Metrics Emitter.");
if (!started.get()) {
if (config.getProtocol().equals("https")) {
loadTruststore(config.getTrustStorePath(), config.getTrustStoreType(), config.getTrustStorePassword());
}
exec.scheduleAtFixedRate(
new ConsumerRunnable(),
config.getFlushPeriod(),
config.getFlushPeriod(),
TimeUnit.MILLISECONDS
);
started.set(true);
}
}
}
@Override
public void emit(Event event)
{
if (!started.get()) {
throw new ISE("WTF emit was called while service is not started yet");
}
if (event instanceof ServiceMetricEvent) {
final TimelineMetric timelineEvent = timelineMetricConverter.druidEventToTimelineMetric((ServiceMetricEvent) event);
if (timelineEvent == null) {
return;
}
try {
final boolean isSuccessful = eventsQueue.offer(
timelineEvent,
config.getEmitWaitTime(),
TimeUnit.MILLISECONDS
);
if (!isSuccessful) {
if (countLostEvents.getAndIncrement() % 1000 == 0) {
log.error(
"Lost total of [%s] events because of emitter queue is full. Please increase the capacity or/and the consumer frequency",
countLostEvents.get()
);
}
}
}
catch (InterruptedException e) {
log.error(e, "got interrupted with message [%s]", e.getMessage());
Thread.currentThread().interrupt();
}
} else if (event instanceof AlertEvent) {
for (Emitter emitter : emitterList) {
emitter.emit(event);
}
} else {
throw new ISE("unknown event type [%s]", event.getClass());
}
}
@Override
protected String getCollectorUri()
{
return collectorURI;
}
@Override
protected int getTimeoutSeconds()
{
return (int) (DEFAULT_FLUSH_TIMEOUT_MILLIS / 1000);
}
private class ConsumerRunnable implements Runnable
{
@Override
public void run()
{
try {
int batchSize = config.getBatchSize();
TimelineMetrics metrics = new TimelineMetrics();
while (eventsQueue.size() > 0 && !exec.isShutdown()) {
try {
final TimelineMetric metricEvent = eventsQueue.poll(
config.getWaitForEventTime(),
TimeUnit.MILLISECONDS
);
if (metricEvent != null) {
metrics.addOrMergeTimelineMetric(metricEvent);
if (metrics.getMetrics().size() == batchSize) {
emitMetrics(metrics);
log.debug(
"sent [%d] events",
metrics.getMetrics().size()
);
metrics = new TimelineMetrics();
}
}
}
catch (InterruptedException e) {
log.error(e, e.getMessage());
Thread.currentThread().interrupt();
}
}
if (metrics.getMetrics().size() > 0) {
emitMetrics(metrics);
log.debug(
"sent [%d] events",
metrics.getMetrics().size()
);
}
}
catch (Exception e) {
log.error(e, e.getMessage());
if (e instanceof InterruptedException) {
Thread.currentThread().interrupt();
}
}
}
}
@Override
public void flush() throws IOException
{
synchronized (started) {
if (started.get()) {
Future future = exec.schedule(new ConsumerRunnable(), 0, TimeUnit.MILLISECONDS);
try {
future.get(DEFAULT_FLUSH_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
}
catch (InterruptedException | ExecutionException | TimeoutException e) {
if (e instanceof InterruptedException) {
throw new RuntimeException("interrupted flushing elements from queue", e);
}
}
}
}
}
@Override
public void close() throws IOException
{
synchronized (started) {
flush();
exec.shutdown();
started.set(false);
}
}
protected static String sanitize(String namespace)
{
Pattern DOT_OR_WHITESPACE = Pattern.compile("[\\s]+|[.]+");
return DOT_OR_WHITESPACE.matcher(namespace).replaceAll("_");
}
}

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/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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 io.druid.emitter.ambari.metrics;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Preconditions;
import java.util.Collections;
import java.util.List;
public class AmbariMetricsEmitterConfig
{
private final static int DEFAULT_BATCH_SIZE = 100;
private final static Long DEFAULT_FLUSH_PERIOD_MILLIS = (long) (60 * 1000); // flush every one minute
private final static long DEFAULT_GET_TIMEOUT = 1000; // default wait for get operations on the queue 1 sec
private final static String DEFAULT_PROTOCOL = "http";
@JsonProperty
private final String hostname;
@JsonProperty
private final int port;
@JsonProperty
private final String protocol;
@JsonProperty
private final String trustStorePath;
@JsonProperty
private final String trustStoreType;
@JsonProperty
private final String trustStorePassword;
@JsonProperty
private final int batchSize;
@JsonProperty
private final long flushPeriod;
@JsonProperty
private final int maxQueueSize;
@JsonProperty("eventConverter")
private final DruidToTimelineMetricConverter druidToTimelineEventConverter;
@JsonProperty
private final List<String> alertEmitters;
@JsonProperty
private final long emitWaitTime;
//waiting up to the specified wait time if necessary for an event to become available.
@JsonProperty
private final long waitForEventTime;
@JsonCreator
public AmbariMetricsEmitterConfig(
@JsonProperty("hostname") String hostname,
@JsonProperty("port") Integer port,
@JsonProperty("protocol") String protocol,
@JsonProperty("trustStorePath") String trustStorePath,
@JsonProperty("trustStoreType") String trustStoretype,
@JsonProperty("trustStorePassword") String trustStorePassword,
@JsonProperty("batchSize") Integer batchSize,
@JsonProperty("flushPeriod") Long flushPeriod,
@JsonProperty("maxQueueSize") Integer maxQueueSize,
@JsonProperty("eventConverter") DruidToTimelineMetricConverter druidToTimelineEventConverter,
@JsonProperty("alertEmitters") List<String> alertEmitters,
@JsonProperty("emitWaitTime") Long emitWaitTime,
@JsonProperty("waitForEventTime") Long waitForEventTime
)
{
this.hostname = Preconditions.checkNotNull(hostname, "hostname can not be null");
this.port = Preconditions.checkNotNull(port, "port can not be null");
this.protocol = protocol == null ? DEFAULT_PROTOCOL : protocol;
this.trustStorePath = trustStorePath;
this.trustStoreType = trustStoretype;
this.trustStorePassword = trustStorePassword;
this.batchSize = (batchSize == null) ? DEFAULT_BATCH_SIZE : batchSize;
this.flushPeriod = flushPeriod == null ? DEFAULT_FLUSH_PERIOD_MILLIS : flushPeriod;
this.maxQueueSize = maxQueueSize == null ? Integer.MAX_VALUE : maxQueueSize;
this.druidToTimelineEventConverter = Preconditions.checkNotNull(
druidToTimelineEventConverter,
"Event converter can not be null"
);
this.alertEmitters = alertEmitters == null ? Collections.<String>emptyList() : alertEmitters;
this.emitWaitTime = emitWaitTime == null ? 0 : emitWaitTime;
this.waitForEventTime = waitForEventTime == null ? DEFAULT_GET_TIMEOUT : waitForEventTime;
}
@JsonProperty
public String getHostname()
{
return hostname;
}
@JsonProperty
public int getPort()
{
return port;
}
@JsonProperty
public String getProtocol()
{
return protocol;
}
@JsonProperty
public String getTrustStorePath()
{
return trustStorePath;
}
@JsonProperty
public String getTrustStoreType()
{
return trustStoreType;
}
@JsonProperty
public String getTrustStorePassword()
{
return trustStorePassword;
}
@JsonProperty
public int getBatchSize()
{
return batchSize;
}
@JsonProperty
public int getMaxQueueSize()
{
return maxQueueSize;
}
@JsonProperty
public long getFlushPeriod()
{
return flushPeriod;
}
@JsonProperty
public DruidToTimelineMetricConverter getDruidToTimelineEventConverter()
{
return druidToTimelineEventConverter;
}
@JsonProperty
public List<String> getAlertEmitters()
{
return alertEmitters;
}
@JsonProperty
public long getEmitWaitTime()
{
return emitWaitTime;
}
@JsonProperty
public long getWaitForEventTime()
{
return waitForEventTime;
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
AmbariMetricsEmitterConfig that = (AmbariMetricsEmitterConfig) o;
if (port != that.port) {
return false;
}
if (batchSize != that.batchSize) {
return false;
}
if (flushPeriod != that.flushPeriod) {
return false;
}
if (maxQueueSize != that.maxQueueSize) {
return false;
}
if (emitWaitTime != that.emitWaitTime) {
return false;
}
if (waitForEventTime != that.waitForEventTime) {
return false;
}
if (!hostname.equals(that.hostname)) {
return false;
}
if (!protocol.equals(that.protocol)) {
return false;
}
if (trustStorePath != null ? !trustStorePath.equals(that.trustStorePath) : that.trustStorePath != null) {
return false;
}
if (trustStoreType != null ? !trustStoreType.equals(that.trustStoreType) : that.trustStoreType != null) {
return false;
}
if (trustStorePassword != null
? !trustStorePassword.equals(that.trustStorePassword)
: that.trustStorePassword != null) {
return false;
}
if (!druidToTimelineEventConverter.equals(that.druidToTimelineEventConverter)) {
return false;
}
return alertEmitters.equals(that.alertEmitters);
}
@Override
public int hashCode()
{
int result = hostname.hashCode();
result = 31 * result + port;
result = 31 * result + protocol.hashCode();
result = 31 * result + (trustStorePath != null ? trustStorePath.hashCode() : 0);
result = 31 * result + (trustStoreType != null ? trustStoreType.hashCode() : 0);
result = 31 * result + (trustStorePassword != null ? trustStorePassword.hashCode() : 0);
result = 31 * result + batchSize;
result = 31 * result + (int) (flushPeriod ^ (flushPeriod >>> 32));
result = 31 * result + maxQueueSize;
result = 31 * result + druidToTimelineEventConverter.hashCode();
result = 31 * result + alertEmitters.hashCode();
result = 31 * result + (int) (emitWaitTime ^ (emitWaitTime >>> 32));
result = 31 * result + (int) (waitForEventTime ^ (waitForEventTime >>> 32));
return result;
}
}

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/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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 io.druid.emitter.ambari.metrics;
import com.fasterxml.jackson.databind.Module;
import com.google.common.base.Function;
import com.google.common.collect.Lists;
import com.google.inject.Binder;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.Provides;
import com.google.inject.name.Named;
import com.google.inject.name.Names;
import com.metamx.emitter.core.Emitter;
import io.druid.guice.JsonConfigProvider;
import io.druid.guice.ManageLifecycle;
import io.druid.initialization.DruidModule;
import java.util.Collections;
import java.util.List;
public class AmbariMetricsEmitterModule implements DruidModule
{
private static final String EMITTER_TYPE = "ambari-metrics";
@Override
public List<? extends Module> getJacksonModules()
{
return Collections.EMPTY_LIST;
}
@Override
public void configure(Binder binder)
{
JsonConfigProvider.bind(binder, "druid.emitter." + EMITTER_TYPE, AmbariMetricsEmitterConfig.class);
}
@Provides
@ManageLifecycle
@Named(EMITTER_TYPE)
public Emitter getEmitter(AmbariMetricsEmitterConfig emitterConfig, final Injector injector){
List<Emitter> emitters = Lists.transform(
emitterConfig.getAlertEmitters(),
new Function<String, Emitter>()
{
@Override
public Emitter apply(String s)
{
return injector.getInstance(Key.get(Emitter.class, Names.named(s)));
}
}
);
return new AmbariMetricsEmitter(emitterConfig, emitters);
}
}

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/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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 io.druid.emitter.ambari.metrics;
import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.metamx.emitter.service.ServiceMetricEvent;
import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type", defaultImpl = WhiteListBasedDruidToTimelineEventConverter.class)
@JsonSubTypes(value= {
@JsonSubTypes.Type(name="all", value = SendAllTimelineEventConverter.class),
@JsonSubTypes.Type(name="whiteList", value = WhiteListBasedDruidToTimelineEventConverter.class)
})
public interface DruidToTimelineMetricConverter
{
/**
* This function acts as a filter. It returns <tt>null</tt> if the event is not suppose to be emitted to Ambari Server
* Also This function will define the mapping between the druid event dimension's values and Ambari Metric Name
*
* @param serviceMetricEvent Druid event ot type {@link ServiceMetricEvent}
*
* @return {@link TimelineMetric} or <tt>null</tt>
*/
TimelineMetric druidEventToTimelineMetric(ServiceMetricEvent serviceMetricEvent);
}

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@ -0,0 +1,129 @@
/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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 io.druid.emitter.ambari.metrics;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeName;
import com.google.common.base.Joiner;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSortedSet;
import com.metamx.emitter.service.ServiceMetricEvent;
import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
/**
* Emits all the events instance of {@link com.metamx.emitter.service.ServiceMetricEvent}.
* <p>
* All the dimensions will be retained and lexicographically order using dimensions name.
* <p>
* The metric name of the timeline event is:
* <namespacePrefix>.<druid service name>.<dimensions values ordered by dimension's name>.<metric>
* <p>
* Note that this name will be sanitized by replacing all the `.` or `space` to `_` {@link AmbariMetricsEmitter#sanitize(String)}
*/
@JsonTypeName("all")
public class SendAllTimelineEventConverter implements DruidToTimelineMetricConverter
{
public static final String DEFAULT_APP_NAME = "druid";
@JsonProperty
private final String namespacePrefix;
@JsonProperty
private final String appName;
@JsonProperty
public String getNamespacePrefix()
{
return namespacePrefix;
}
@JsonCreator
public SendAllTimelineEventConverter(
@JsonProperty("namespacePrefix") String namespacePrefix,
@JsonProperty("appName") String appName
)
{
this.namespacePrefix = namespacePrefix;
this.appName = appName == null ? DEFAULT_APP_NAME : appName;
}
@Override
public TimelineMetric druidEventToTimelineMetric(ServiceMetricEvent serviceMetricEvent)
{
ImmutableList.Builder metricNameBuilder = new ImmutableList.Builder<>();
if(!Strings.isNullOrEmpty(namespacePrefix)) {
metricNameBuilder.add(namespacePrefix);
}
metricNameBuilder.add(AmbariMetricsEmitter.sanitize(serviceMetricEvent.getService()));
ImmutableSortedSet<String> dimNames = ImmutableSortedSet.copyOf(serviceMetricEvent.getUserDims().keySet());
for (String dimName : dimNames) {
metricNameBuilder.add(
AmbariMetricsEmitter.sanitize(
String.valueOf(
serviceMetricEvent.getUserDims().get(dimName)
)
)
);
}
metricNameBuilder.add(AmbariMetricsEmitter.sanitize(serviceMetricEvent.getMetric()));
TimelineMetric metric = new TimelineMetric();
metric.setMetricName(Joiner.on(".").join(metricNameBuilder.build()));
metric.setAppId(appName);
metric.setHostName(serviceMetricEvent.getHost());
metric.setType(serviceMetricEvent.getFeed());
metric.setInstanceId(serviceMetricEvent.getService());
long ts = serviceMetricEvent.getCreatedTime().getMillis();
metric.setStartTime(ts);
metric.setTimestamp(ts);
metric.getMetricValues().put(ts, serviceMetricEvent.getValue().doubleValue());
return metric;
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
SendAllTimelineEventConverter that = (SendAllTimelineEventConverter) o;
if (namespacePrefix != null ? !namespacePrefix.equals(that.namespacePrefix) : that.namespacePrefix != null) {
return false;
}
return appName.equals(that.appName);
}
@Override
public int hashCode()
{
int result = namespacePrefix != null ? namespacePrefix.hashCode() : 0;
result = 31 * result + appName.hashCode();
return result;
}
}

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/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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 io.druid.emitter.ambari.metrics;
import com.fasterxml.jackson.annotation.JacksonInject;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonTypeName;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.base.Strings;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSortedMap;
import com.google.common.io.CharStreams;
import com.google.common.io.Files;
import com.metamx.common.ISE;
import com.metamx.common.logger.Logger;
import com.metamx.emitter.service.ServiceMetricEvent;
import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.Collections;
import java.util.List;
import java.util.SortedMap;
@JsonTypeName("whiteList")
public class WhiteListBasedDruidToTimelineEventConverter implements DruidToTimelineMetricConverter
{
private static final Logger LOGGER = new Logger(WhiteListBasedDruidToTimelineEventConverter.class);
/**
* @code whiteListDimsMapper is a white list of metric->dimensions mappings.
* Key is the druid metric name or the metric's prefix.
* Value is a list of metric's dimensions names.
* The order of the dimension name is important, it will be used to build the ambari metrics name.
* For instance if we have dimensions dataSource and queryType for metric query/time
* the final metric name will be -> prefix.dataSource.queryType.metricName
* Note that this name will be sanitized by replacing all the `.` or `space` to `_` {@link AmbariMetricsEmitter#sanitize(String)}
*/
private final ImmutableSortedMap<String, ImmutableList<String>> whiteListDimsMapper;
@JsonProperty
private final String namespacePrefix;
@JsonProperty
private final String appName;
@JsonProperty
private final String mapPath;
private final ObjectMapper mapper;
@JsonCreator
public WhiteListBasedDruidToTimelineEventConverter(
@JsonProperty("namespacePrefix") String namespacePrefix,
@JsonProperty("appName") String appName,
@JsonProperty("mapPath") String mapPath,
@JacksonInject ObjectMapper mapper
)
{
this.mapper = Preconditions.checkNotNull(mapper);
this.mapPath = mapPath;
this.whiteListDimsMapper = readMap(this.mapPath);
this.namespacePrefix = namespacePrefix;
this.appName = appName == null ? SendAllTimelineEventConverter.DEFAULT_APP_NAME : appName;
}
@JsonProperty
public String getNamespacePrefix()
{
return namespacePrefix;
}
/**
* @param event Event subject to filtering
*
* @return true if and only if the event prefix key is in the {@code whiteListDimsMapper}
*/
private boolean isInWhiteList(ServiceMetricEvent event)
{
return getPrefixKey(event.getMetric(), whiteListDimsMapper) != null;
}
/**
* @param key the metric name to lookup
* @param whiteList
*
* @return <tt>null</tt> if the key does not match with any of the prefixes keys in @code metricsWhiteList,
* or the prefix in @code whiteListDimsMapper
*/
private String getPrefixKey(String key, SortedMap<String, ?> whiteList)
{
String prefixKey = null;
if (whiteList.containsKey(key)) {
return key;
}
SortedMap<String, ?> headMap = whiteList.headMap(key);
if (!headMap.isEmpty() && key.startsWith(headMap.lastKey())) {
prefixKey = headMap.lastKey();
}
return prefixKey;
}
/**
* Returns a {@link List} of the white-listed dimension's values to send.
* The list is order is the same as the order of dimensions {@code whiteListDimsMapper}
*
* @param event the event for which will filter dimensions
*
* @return {@link List} of the filtered dimension values to send or <tt>null<tt/> if the event is not in the white list
*/
private List<String> getOrderedDimValues(ServiceMetricEvent event)
{
String prefixKey = getPrefixKey(event.getMetric(), whiteListDimsMapper);
if (prefixKey == null) {
return null;
}
ImmutableList.Builder<String> outputList = new ImmutableList.Builder();
List<String> dimensions = whiteListDimsMapper.get(prefixKey);
if (dimensions == null) {
return Collections.emptyList();
}
for (String dimKey : dimensions) {
String dimValue = (String) event.getUserDims().get(dimKey);
if (dimValue != null) {
outputList.add(AmbariMetricsEmitter.sanitize(dimValue));
}
}
return outputList.build();
}
/**
* @param serviceMetricEvent druid metric event to convert
*
* @return <tt>null</tt> if the event is not white listed, otherwise return {@link TimelineMetric}
* <p>
* The metric name of the ambari timeline metric event is:
* <namespacePrefix>.<druid service name>.<white-listed dimensions>.<metric>
* <p/>
* The order of the dimension is the order returned by {@code getOrderedDimValues()}
* Note that this name will be sanitized by replacing all the `.` or space by `_` {@link AmbariMetricsEmitter#sanitize(String)}
* </p>
*/
@Override
public TimelineMetric druidEventToTimelineMetric(ServiceMetricEvent serviceMetricEvent)
{
if (!this.isInWhiteList(serviceMetricEvent)) {
return null;
}
final ImmutableList.Builder<String> metricNameBuilder = new ImmutableList.Builder<>();
if(!Strings.isNullOrEmpty(namespacePrefix)) {
metricNameBuilder.add(namespacePrefix);
}
metricNameBuilder.add(AmbariMetricsEmitter.sanitize(serviceMetricEvent.getService()));
metricNameBuilder.addAll(this.getOrderedDimValues(serviceMetricEvent));
metricNameBuilder.add(AmbariMetricsEmitter.sanitize(serviceMetricEvent.getMetric()));
TimelineMetric metric = new TimelineMetric();
metric.setMetricName(Joiner.on(".").join(metricNameBuilder.build()));
metric.setAppId(appName);
metric.setHostName(serviceMetricEvent.getHost());
metric.setType(serviceMetricEvent.getFeed());
metric.setInstanceId(serviceMetricEvent.getService());
long ts = serviceMetricEvent.getCreatedTime().getMillis();
metric.setStartTime(ts);
metric.setTimestamp(ts);
metric.getMetricValues().put(ts, serviceMetricEvent.getValue().doubleValue());
return metric;
}
private ImmutableSortedMap<String, ImmutableList<String>> readMap(final String mapPath)
{
String fileContent;
String actualPath = mapPath;
try {
if (Strings.isNullOrEmpty(mapPath)) {
actualPath = this.getClass().getClassLoader().getResource("defaultWhiteListMap.json").getFile();
LOGGER.info("using default whiteList map located at [%s]", actualPath);
fileContent = CharStreams.toString(new InputStreamReader(this.getClass()
.getClassLoader()
.getResourceAsStream("defaultWhiteListMap.json")));
} else {
fileContent = Files.asCharSource(new File(mapPath), Charset.forName("UTF-8")).read();
}
return mapper.reader(new TypeReference<ImmutableSortedMap<String, ImmutableList<String>>>()
{
}).readValue(fileContent);
}
catch (IOException e) {
throw new ISE(e, "Got an exception while parsing file [%s]", actualPath);
}
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
WhiteListBasedDruidToTimelineEventConverter that = (WhiteListBasedDruidToTimelineEventConverter) o;
if (namespacePrefix != null ? !namespacePrefix.equals(that.namespacePrefix) : that.namespacePrefix != null) {
return false;
}
if (!appName.equals(that.appName)) {
return false;
}
return mapPath != null ? mapPath.equals(that.mapPath) : that.mapPath == null;
}
@Override
public int hashCode()
{
int result = namespacePrefix != null ? namespacePrefix.hashCode() : 0;
result = 31 * result + appName.hashCode();
result = 31 * result + (mapPath != null ? mapPath.hashCode() : 0);
return result;
}
}

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@ -0,0 +1 @@
io.druid.emitter.ambari.metrics.AmbariMetricsEmitterModule

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@ -0,0 +1,73 @@
{
"ingest/events": [
"dataSource"
],
"ingest/handoff/failed": [
"dataSource"
],
"ingest/persists": [
"dataSource"
],
"ingest/rows/output": [
"dataSource"
],
"ingest/merge": [
"dataSource"
],
"jvm/gc": [],
"jvm/mem": [
"memKind"
],
"query/cpu/time": [
"dataSource",
"type"
],
"query/node/time": [
"dataSource",
"type"
],
"query/node/ttfb": [
"dataSource",
"type"
],
"query/partial/time": [
"dataSource",
"type"
],
"query/segment/time": [
"dataSource",
"type"
],
"query/segmentAndCache/time": [
"dataSource",
"type"
],
"query/time": [
"dataSource",
"type"
],
"query/wait/time": [
"dataSource",
"type"
],
"segment/count": [
"dataSource"
],
"segment/dropQueue/count": [],
"segment/loadQueue/count": [],
"segment/loadQueue/failed": [],
"segment/loadQueue/size": [],
"segment/scan/pending": [],
"segment/size": [
"dataSource"
],
"segment/usedPercent": [
"dataSource"
],
"segment/added/bytes" : [
"dataSource"
],
"segment/nuked/bytes" : [
"dataSource"
]
}

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@ -0,0 +1,69 @@
package io.druid.emitter.ambari.metrics;
import com.fasterxml.jackson.databind.InjectableValues;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.druid.jackson.DefaultObjectMapper;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import java.io.IOException;
import java.util.Collections;
public class AmbariMetricsEmitterConfigTest
{
private final ObjectMapper mapper = new DefaultObjectMapper();
@Before
public void setUp()
{
mapper.setInjectableValues(new InjectableValues.Std().addValue(
ObjectMapper.class,
new DefaultObjectMapper()
));
}
@Test
public void testSerDeAmbariMetricsEmitterConfig() throws IOException
{
AmbariMetricsEmitterConfig config = new AmbariMetricsEmitterConfig(
"hostname",
8080,
"http",
"truststore.path",
"truststore.type",
"truststore.password",
1000,
1000L,
100,
new SendAllTimelineEventConverter("prefix", "druid"),
Collections.EMPTY_LIST,
500L,
400L
);
AmbariMetricsEmitterConfig serde = mapper.reader(AmbariMetricsEmitterConfig.class).readValue(
mapper.writeValueAsBytes(config)
);
Assert.assertEquals(config, serde);
}
@Test
public void testSerDeDruidToTimelineEventConverter() throws IOException
{
SendAllTimelineEventConverter sendAllConverter = new SendAllTimelineEventConverter("prefix", "druid");
DruidToTimelineMetricConverter serde = mapper.reader(DruidToTimelineMetricConverter.class)
.readValue( mapper.writeValueAsBytes(sendAllConverter));
Assert.assertEquals(sendAllConverter, serde);
WhiteListBasedDruidToTimelineEventConverter whiteListBasedDruidToTimelineEventConverter = new WhiteListBasedDruidToTimelineEventConverter(
"prefix",
"druid",
"",
new DefaultObjectMapper()
);
serde = mapper.reader(DruidToTimelineMetricConverter.class)
.readValue(mapper.writeValueAsBytes(
whiteListBasedDruidToTimelineEventConverter));
Assert.assertEquals(whiteListBasedDruidToTimelineEventConverter, serde);
}
}

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@ -0,0 +1,34 @@
/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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 io.druid.emitter.ambari.metrics;
import org.junit.Assert;
import org.junit.Test;
public class DruidToWhiteListBasedConverterTest
{
@Test
public void testSanitize()
{
String test = "host name.yahoo.com:8080";
Assert.assertEquals("host_name_yahoo_com:8080", AmbariMetricsEmitter.sanitize(test));
}
}

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@ -0,0 +1,141 @@
package io.druid.emitter.ambari.metrics;
import com.google.common.collect.Maps;
import com.metamx.emitter.service.ServiceMetricEvent;
import io.druid.jackson.DefaultObjectMapper;
import junitparams.JUnitParamsRunner;
import junitparams.Parameters;
import org.apache.hadoop.metrics2.sink.timeline.TimelineMetric;
import org.easymock.EasyMock;
import org.joda.time.DateTime;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(JUnitParamsRunner.class)
public class WhiteListBasedDruidToTimelineEventConverterTest
{
final private String prefix = "druid";
final private WhiteListBasedDruidToTimelineEventConverter defaultWhiteListBasedDruidToTimelineEventConverter = new WhiteListBasedDruidToTimelineEventConverter(
prefix,
"druid",
null,
new DefaultObjectMapper()
);
private ServiceMetricEvent event;
private final DateTime createdTime = new DateTime();
private final String hostname = "testHost:8080";
private final String serviceName = "historical";
private final String defaultNamespace = prefix + "." + serviceName;
@Before
public void setUp()
{
event = EasyMock.createMock(ServiceMetricEvent.class);
EasyMock.expect(event.getHost()).andReturn(hostname).anyTimes();
EasyMock.expect(event.getService()).andReturn(serviceName).anyTimes();
EasyMock.expect(event.getCreatedTime()).andReturn(createdTime).anyTimes();
EasyMock.expect(event.getUserDims()).andReturn(Maps.<String, Object>newHashMap()).anyTimes();
EasyMock.expect(event.getValue()).andReturn(10).anyTimes();
EasyMock.expect(event.getFeed()).andReturn("metrics").anyTimes();
}
@Test
@Parameters(
{
"query/time, true",
"query/node/ttfb, true",
"query/segmentAndCache/time, true",
"query/intervalChunk/time, false",
"query/time/balaba, true",
"query/tim, false",
"segment/added/bytes, true",
"segment/count, true",
"segment/size, true",
"segment/cost/raw, false",
"coordinator/TIER_1 /cost/raw, false",
"segment/Kost/raw, false",
", false",
"word, false",
"coordinator, false",
"server/, false",
"ingest/persists/time, true",
"jvm/mem/init, true",
"jvm/gc/count, true"
}
)
public void testDefaultIsInWhiteList(String key, boolean expectedValue)
{
EasyMock.expect(event.getMetric()).andReturn(key).anyTimes();
EasyMock.replay(event);
boolean isIn = defaultWhiteListBasedDruidToTimelineEventConverter.druidEventToTimelineMetric(event) != null;
Assert.assertEquals(expectedValue, isIn);
}
@Test
@Parameters
public void testGetName(ServiceMetricEvent serviceMetricEvent, String expectedPath)
{
TimelineMetric metric = defaultWhiteListBasedDruidToTimelineEventConverter.druidEventToTimelineMetric(serviceMetricEvent);
String path = null;
if (metric != null) {
path = metric.getMetricName();
}
Assert.assertEquals(expectedPath, path);
}
private Object[] parametersForTestGetName()
{
return new Object[]{
new Object[]{
new ServiceMetricEvent.Builder().setDimension("id", "dummy_id")
.setDimension("status", "some_status")
.setDimension("numDimensions", "1")
.setDimension("segment", "dummy_segment")
.build(createdTime, "query/segment/time/balabla/more", 10)
.build(serviceName, hostname),
defaultNamespace + ".query/segment/time/balabla/more"
},
new Object[]{
new ServiceMetricEvent.Builder().setDimension("dataSource", "some_data_source")
.setDimension("tier", "_default_tier")
.build(createdTime, "segment/max", 10)
.build(serviceName, hostname),
null
},
new Object[]{
new ServiceMetricEvent.Builder().setDimension("dataSource", "data-source")
.setDimension("type", "groupBy")
.setDimension("interval", "2013/2015")
.setDimension("some_random_dim1", "random_dim_value1")
.setDimension("some_random_dim2", "random_dim_value2")
.setDimension("hasFilters", "no")
.setDimension("duration", "P1D")
.setDimension("remoteAddress", "194.0.90.2")
.setDimension("id", "ID")
.setDimension("context", "{context}")
.build(createdTime, "query/time", 10)
.build(serviceName, hostname),
defaultNamespace + ".data-source.groupBy.query/time"
},
new Object[]{
new ServiceMetricEvent.Builder().setDimension("dataSource", "data-source")
.setDimension("type", "groupBy")
.setDimension("some_random_dim1", "random_dim_value1")
.build(createdTime, "ingest/persists/count", 10)
.build(serviceName, hostname),
defaultNamespace + ".data-source.ingest/persists/count"
},
new Object[]{
new ServiceMetricEvent.Builder().setDimension("bufferPoolName", "BufferPool")
.setDimension("type", "groupBy")
.setDimension("some_random_dim1", "random_dim_value1")
.build(createdTime, "jvm/bufferpool/capacity", 10)
.build(serviceName, hostname),
null
}
};
}
}

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@ -120,6 +120,7 @@
<module>extensions-contrib/google-extensions</module>
<module>extensions-contrib/virtual-columns</module>
<module>extensions-contrib/thrift-extensions</module>
<module>extensions-contrib/ambari-metrics-emitter</module>
</modules>
<dependencyManagement>