com.codahale.metrics.httpasyncclient.InstrumentedNClientConnManager Maven / Gradle / Ivy

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package com.codahale.metrics.httpasyncclient;

import com.codahale.metrics.MetricRegistry;
import org.apache.http.config.Registry;
import org.apache.http.conn.DnsResolver;
import org.apache.http.conn.SchemePortResolver;
import org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager;
import org.apache.http.nio.conn.ManagedNHttpClientConnection;
import org.apache.http.nio.conn.NHttpClientConnectionManager;
import org.apache.http.nio.conn.NHttpConnectionFactory;
import org.apache.http.nio.conn.SchemeIOSessionStrategy;
import org.apache.http.nio.reactor.ConnectingIOReactor;

import java.util.concurrent.TimeUnit;

import static com.codahale.metrics.MetricRegistry.name;

public class InstrumentedNClientConnManager extends PoolingNHttpClientConnectionManager {

    public InstrumentedNClientConnManager(final ConnectingIOReactor ioreactor, final NHttpConnectionFactory connFactory, final SchemePortResolver schemePortResolver, final MetricRegistry metricRegistry, final Registry iosessionFactoryRegistry, final long timeToLive, final TimeUnit tunit, final DnsResolver dnsResolver, final String name) {
        super(ioreactor, connFactory, iosessionFactoryRegistry, schemePortResolver, dnsResolver, timeToLive, tunit);
        // this acquires a lock on the connection pool; remove if contention sucks
        metricRegistry.registerGauge(name(NHttpClientConnectionManager.class, name, "available-connections"),
                () -> getTotalStats().getAvailable());
        // this acquires a lock on the connection pool; remove if contention sucks
        metricRegistry.registerGauge(name(NHttpClientConnectionManager.class, name, "leased-connections"),
                () -> getTotalStats().getLeased());
        // this acquires a lock on the connection pool; remove if contention sucks
        metricRegistry.registerGauge(name(NHttpClientConnectionManager.class, name, "max-connections"),
                () -> getTotalStats().getMax());
        // this acquires a lock on the connection pool; remove if contention sucks
        metricRegistry.registerGauge(name(NHttpClientConnectionManager.class, name, "pending-connections"),
                () -> getTotalStats().getPending());
    }

}