com.spotify.helios.servicescommon.ManagedStatsdReporter Maven / Gradle / Ivy

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/*
 * Copyright (c) 2014 Spotify AB.
 *
 * 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 com.spotify.helios.servicescommon;

import com.google.common.base.Splitter;
import com.google.common.base.Strings;

import com.readytalk.metrics.StatsDReporter;

import io.dropwizard.lifecycle.Managed;

import com.codahale.metrics.MetricRegistry;

import java.util.List;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.concurrent.TimeUnit.SECONDS;

public class ManagedStatsdReporter implements Managed {

  private static final int POLL_INTERVAL_SECONDS = 15;

  private final StatsDReporter statsdReporter;

  public ManagedStatsdReporter(final String endpoint, final String name,
                               final MetricRegistry registry) {
    if (Strings.isNullOrEmpty(endpoint)) {
      statsdReporter = null;
      return;
    }
    final List parts = Splitter.on(":").splitToList(endpoint);
    checkArgument(parts.size() == 2, "Specification of statsd host port has wrong number of " +
                                     "parts. Should be host:port");
    final String host = parts.get(0);
    final int port = Integer.valueOf(parts.get(1));
    statsdReporter = StatsDReporter.forRegistry(registry).build(host, port);
  }

  @Override
  public void start() throws Exception {
    if (statsdReporter != null) {
      statsdReporter.start(POLL_INTERVAL_SECONDS, SECONDS);
    }
  }

  @Override
  public void stop() throws Exception {
    if (statsdReporter != null) {
      statsdReporter.close();
    }
  }
}