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Gravitino is a high-performance, geo-distributed and federated metadata lake.

There is a newer version: 0.6.1-incubating

/*
 * 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
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package org.apache.gravitino.server.web;

import com.codahale.metrics.Clock;
import com.codahale.metrics.SlidingTimeWindowArrayReservoir;
import com.codahale.metrics.jersey2.InstrumentedResourceMethodApplicationListener;
import java.util.concurrent.TimeUnit;
import org.apache.gravitino.metrics.MetricNames;
import org.apache.gravitino.metrics.source.MetricsSource;
import org.glassfish.jersey.server.ResourceConfig;

public class HttpServerMetricsSource extends MetricsSource {
  public HttpServerMetricsSource(String name, ResourceConfig resourceConfig, JettyServer server) {
    super(name);
    resourceConfig.register(
        new InstrumentedResourceMethodApplicationListener(
            getMetricRegistry(),
            Clock.defaultClock(),
            false,
            () ->
                new SlidingTimeWindowArrayReservoir(
                    getTimeSlidingWindowSeconds(), TimeUnit.SECONDS)));
    registerGauge(
        MetricNames.SERVER_IDLE_THREAD_NUM, () -> server.getThreadPool().getIdleThreads());
  }
}