himanshug commented on a change in pull request #7717: Adding influxdb emitter as a contrib extension URL: https://github.com/apache/incubator-druid/pull/7717#discussion_r286231085
########## File path: extensions-contrib/influxdb-emitter/src/main/java/org/apache/druid/emitter/influxdb/InfluxdbEmitter.java ########## @@ -0,0 +1,231 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF 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 org.apache.druid.emitter.influxdb; + +import com.google.common.collect.ImmutableSet; +import com.google.common.util.concurrent.ThreadFactoryBuilder; +import org.apache.druid.java.util.common.logger.Logger; +import org.apache.druid.java.util.emitter.core.Emitter; +import org.apache.druid.java.util.emitter.core.Event; +import org.apache.druid.java.util.emitter.service.ServiceMetricEvent; +import org.apache.http.client.HttpClient; +import org.apache.http.client.methods.HttpPost; +import org.apache.http.entity.ContentType; +import org.apache.http.entity.StringEntity; +import org.apache.http.impl.client.HttpClientBuilder; + +import java.io.IOException; +import java.util.Arrays; +import java.util.concurrent.Executors; +import java.util.concurrent.LinkedBlockingQueue; +import java.util.concurrent.ScheduledExecutorService; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; +import java.util.regex.Pattern; + + +public class InfluxdbEmitter implements Emitter +{ + + private static final Logger log = new Logger(InfluxdbEmitter.class); + private HttpClient influxdbClient; + private final InfluxdbEmitterConfig influxdbEmitterConfig; + private final AtomicBoolean started = new AtomicBoolean(false); + private final ScheduledExecutorService exec = Executors.newScheduledThreadPool(1, new ThreadFactoryBuilder() + .setDaemon(true) + .setNameFormat("InfluxdbEmitter-%s") + .build()); + + private final ImmutableSet dimensionWhiteList; + + private final LinkedBlockingQueue<ServiceMetricEvent> eventsQueue; + + public InfluxdbEmitter(InfluxdbEmitterConfig influxdbEmitterConfig) + { + this.influxdbEmitterConfig = influxdbEmitterConfig; + this.influxdbClient = HttpClientBuilder.create().build(); + this.eventsQueue = new LinkedBlockingQueue<>(influxdbEmitterConfig.getMaxQueueSize()); + + this.dimensionWhiteList = ImmutableSet.of( + "dataSource", + "type", + "numMetrics", + "numDimensions", + "threshold", + "dimension", + "taskType", + "taskStatus", + "tier" + ); + + log.info("constructing influxdb emitter"); + } + + @Override + public void start() + { + synchronized (started) { + if (!started.get()) { + exec.scheduleAtFixedRate( + new ConsumerRunnable(), + influxdbEmitterConfig.getFlushDelay(), + influxdbEmitterConfig.getFlushPeriod(), + TimeUnit.MILLISECONDS + ); + started.set(true); + } + } + } + + @Override + public void emit(Event event) + { + if (event instanceof ServiceMetricEvent) { + ServiceMetricEvent metricEvent = (ServiceMetricEvent) event; + try { + eventsQueue.put(metricEvent); + } + catch (InterruptedException exception) { + log.error(exception.toString()); + Thread.currentThread().interrupt(); + } + } + } + + public void postToInflux(String payload) + { + HttpPost post = new HttpPost( + "http://"; + influxdbEmitterConfig.getHostname() + + ":" + influxdbEmitterConfig.getPort() + + "/write?db=" + influxdbEmitterConfig.getDatabaseName() + + "&u=" + influxdbEmitterConfig.getInfluxdbUserName() + + "&p=" + influxdbEmitterConfig.getInfluxdbPassword() + ); + + post.setEntity(new StringEntity(payload, ContentType.DEFAULT_TEXT)); + post.setHeader("Content-Type", "application/x-www-form-urlencoded"); + + try { + influxdbClient.execute(post); + } + catch (IOException ex) { + log.info(ex.toString()); + } + finally { + post.releaseConnection(); + } + } + + public String transformForInfluxSystems(ServiceMetricEvent event) + { + // split Druid metric on slashes and join middle parts (if any) with "_" + String[] parts = getValue("metric", event).split("/"); + String metric = String.join( + "_", + Arrays.asList( + Arrays.copyOfRange( + parts, + 1, + parts.length - 1 + ) + ) + ); + + String payload = "druid_" + parts[0] + ","; + + payload += "service=" + getValue("service", event) + + ((parts.length == 2) ? "" : ",metric=druid_" + metric) + + ",hostname=" + getValue("host", event).split(":")[0]; + + + ImmutableSet<String> dimNames = ImmutableSet.copyOf(event.getUserDims().keySet()); + for (String dimName : dimNames) { + if (this.dimensionWhiteList.contains(dimName)) { + payload += "," + dimName + "=" + sanitize(String.valueOf(event.getUserDims().get(dimName))); + } + } + + payload += " druid_" + parts[parts.length - 1] + "=" + getValue("value", event); + + return payload + " " + event.getCreatedTime().getMillis() * 1000000 + '\n'; + } + + protected static String sanitize(String namespace) Review comment: ```suggestion private static String sanitize(String namespace) ``` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. 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