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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container;
import com.yahoo.config.subscription.ConfigSubscriber;
import com.yahoo.container.QrConfig.Rpc;
import com.yahoo.container.osgi.ContainerRpcAdaptor;
/**
* The http server singleton managing listeners for various ports,
* and the threads used to respond to requests on the ports
*
* @author bratseth
*/
@SuppressWarnings("deprecation")
public class Server {
//TODO: Make this final again.
private static Server instance = new Server();
private ConfigSubscriber subscriber = new ConfigSubscriber();
/** The OSGi container instance of this server */
private Container container = Container.get();
/** A short string which is different for all the qrserver instances on a given node. */
private String localServerDiscriminator = "qrserver.0";
/** Creates a new server instance. Not usually useful, use get() to get the current server */
private Server() { }
/** @deprecated returns 0 */
@Deprecated
public int searchQueriesInFlight() {
return 0;
}
/**
* An estimate of current number of connections. It is better to be
* inaccurate than to acquire a lock per query fsync.
*
* @return The current number of open search connections
*/
/** @deprecated returns 0 */
@Deprecated
public int getCurrentConnections() {
return 0;
}
public static Server get() {
return instance;
}
private void initRpcServer(Rpc rpcConfig) {
if (rpcConfig.enabled()) {
ContainerRpcAdaptor rpcAdaptor = container.getRpcAdaptor();
rpcAdaptor.listen(rpcConfig.port());
rpcAdaptor.setSlobrokId(rpcConfig.slobrokId());
}
}
/** Ugly hack, see Container.resetInstance */
static void resetInstance() {
instance = new Server();
}
// TODO: Make independent of config
public void initialize(QrConfig config) {
localServerDiscriminator = config.discriminator();
container.setupFileAcquirer(config.filedistributor());
initRpcServer(config.rpc());
}
/**
* A string unique for this QRS on this server.
*
* @return a server specific string
*/
public String getServerDiscriminator() {
return localServerDiscriminator;
}
public void shutdown() {
if (subscriber!=null) subscriber.close();
}
}
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