MetricsModule.java

/**
 * Copyright 2015 StreamSets Inc.
 *
 * Licensed under 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.streamsets.datacollector.metrics;

import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.jvm.BufferPoolMetricSet;
import com.codahale.metrics.jvm.FileDescriptorRatioGauge;
import com.codahale.metrics.jvm.GarbageCollectorMetricSet;
import com.codahale.metrics.jvm.MemoryUsageGaugeSet;
import com.codahale.metrics.jvm.ThreadStatesGaugeSet;
import dagger.Module;
import dagger.Provides;

import javax.inject.Singleton;
import java.lang.management.ManagementFactory;

@Module(library = true)
public class MetricsModule {

  @Provides @Singleton MetricRegistry provideMetrics() {
    MetricRegistry metrics = new MetricRegistry();
    metrics.register("jvm.memory", new MemoryUsageGaugeSet());
    metrics.register("jvm.garbage", new GarbageCollectorMetricSet());
    metrics.register("jvm.threads", new ThreadStatesGaugeSet());
    metrics.register("jvm.files", new FileDescriptorRatioGauge());
    metrics.register("jvm.buffers", new BufferPoolMetricSet(ManagementFactory.getPlatformMBeanServer()));
    return metrics;
  }

}