Merge "Refactor Network's use of mUrlConnectionFactory."

import android.system.OsConstants;

import android.util.proto.ProtoOutputStream;

import com.android.internal.annotations.GuardedBy;

import com.android.okhttp.internalandroidapi.Dns;

import com.android.okhttp.internalandroidapi.HttpURLConnectionFactory;

    // Objects used to perform per-network operations such as getSocketFactory

    // and openConnection, and a lock to protect access to them.

    private volatile NetworkBoundSocketFactory mNetworkBoundSocketFactory = null;

    // mLock should be used to control write access to mUrlConnectionFactory.

    // maybeInitUrlConnectionFactory() must be called prior to reading this field.

    private volatile HttpURLConnectionFactory mUrlConnectionFactory;

    // mUrlConnectionFactory is initialized lazily when it is first needed.

    @GuardedBy("mLock")

    private HttpURLConnectionFactory mUrlConnectionFactory;

    private final Object mLock = new Object();

    // Default connection pool values. These are evaluated at startup, just

        return mNetworkBoundSocketFactory;

    }

    // TODO: This creates a connection pool and host resolver for

    // every Network object, instead of one for every NetId. This is

    // suboptimal, because an app could potentially have more than one

    // Network object for the same NetId, causing increased memory footprint

    // and performance penalties due to lack of connection reuse (connection

    // setup time, congestion window growth time, etc.).

    //

    // Instead, investigate only having one connection pool and host resolver

    // for every NetId, perhaps by using a static HashMap of NetIds to

    // connection pools and host resolvers. The tricky part is deciding when

    // to remove a map entry; a WeakHashMap shouldn't be used because whether

    // a Network is referenced doesn't correlate with whether a new Network

    // will be instantiated in the near future with the same NetID. A good

    // solution would involve purging empty (or when all connections are timed

    // out) ConnectionPools.

    private void maybeInitUrlConnectionFactory() {

        synchronized (mLock) {

            if (mUrlConnectionFactory == null) {

    private static HttpURLConnectionFactory createUrlConnectionFactory(Dns dnsLookup) {

        // Set configuration on the HttpURLConnectionFactory that will be good for all

        // connections created by this Network. Configuration that might vary is left

        // until openConnection() and passed as arguments.

                Dns dnsLookup = hostname -> Arrays.asList(Network.this.getAllByName(hostname));

        HttpURLConnectionFactory urlConnectionFactory = new HttpURLConnectionFactory();

        urlConnectionFactory.setDns(dnsLookup); // Let traffic go via dnsLookup

        // A private connection pool just for this Network.

        urlConnectionFactory.setNewConnectionPool(httpMaxConnections,

                httpKeepAliveDurationMs, TimeUnit.MILLISECONDS);

                mUrlConnectionFactory = urlConnectionFactory;

            }

        }

        return urlConnectionFactory;

    }

    /**

     */

    public URLConnection openConnection(URL url, java.net.Proxy proxy) throws IOException {

        if (proxy == null) throw new IllegalArgumentException("proxy is null");

        maybeInitUrlConnectionFactory();

        // TODO: This creates a connection pool and host resolver for

        // every Network object, instead of one for every NetId. This is

        // suboptimal, because an app could potentially have more than one

        // Network object for the same NetId, causing increased memory footprint

        // and performance penalties due to lack of connection reuse (connection

        // setup time, congestion window growth time, etc.).

        //

        // Instead, investigate only having one connection pool and host resolver

        // for every NetId, perhaps by using a static HashMap of NetIds to

        // connection pools and host resolvers. The tricky part is deciding when

        // to remove a map entry; a WeakHashMap shouldn't be used because whether

        // a Network is referenced doesn't correlate with whether a new Network

        // will be instantiated in the near future with the same NetID. A good

        // solution would involve purging empty (or when all connections are timed

        // out) ConnectionPools.

        final HttpURLConnectionFactory urlConnectionFactory;

        synchronized (mLock) {

            if (mUrlConnectionFactory == null) {

                Dns dnsLookup = hostname -> Arrays.asList(getAllByName(hostname));

                mUrlConnectionFactory = createUrlConnectionFactory(dnsLookup);

            }

            urlConnectionFactory = mUrlConnectionFactory;

        }

        SocketFactory socketFactory = getSocketFactory();

        return mUrlConnectionFactory.openConnection(url, socketFactory, proxy);

        return urlConnectionFactory.openConnection(url, socketFactory, proxy);

    }

    /**