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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package ai.vespa.metricsproxy.rpc;
import com.yahoo.component.AbstractComponent;
import com.yahoo.jrt.Acceptor;
import com.yahoo.jrt.ListenFailedException;
import com.yahoo.jrt.Method;
import com.yahoo.jrt.Spec;
import com.yahoo.jrt.Supervisor;
import com.yahoo.jrt.Transport;
import java.util.logging.Logger;
import static java.util.logging.Level.FINE;
import static java.util.logging.Level.INFO;
/**
* Contains the connector for the rpc server, to prevent it from going down after component reconfiguration.
* This will only be recreated if the rpc port changes, which should never happen under normal circumstances.
*
* @author gjoranv
*/
public class RpcConnector extends AbstractComponent {
private static final Logger log = Logger.getLogger(RpcConnector.class.getName());
private final Supervisor supervisor;
private final Acceptor acceptor;
public RpcConnector(RpcConnectorConfig config) {
supervisor = new Supervisor(new Transport("rpc-" + config.port())).setDropEmptyBuffers(true);
Spec spec = new Spec(config.port());
try {
acceptor = supervisor.listen(spec);
log.log(FINE, () -> "Listening on " + spec.host() + ":" + acceptor.port());
} catch (ListenFailedException e) {
stop();
log.log(INFO, "Failed listening at " + spec.host() + ":" + spec.port());
throw new RuntimeException("Could not listen at " + spec, e);
}
}
public int port() {
return acceptor.port();
}
/**
* Adds a method. If a method with the same name already exists, it will be replaced.
* @param method The method to add.
*/
public void addMethod(Method method) {
supervisor.addMethod(method);
}
public void stop() {
if (acceptor != null)
acceptor.shutdown().join();
if (supervisor != null)
supervisor.transport().shutdown().join();
}
@Override
public void deconstruct() {
stop();
super.deconstruct();
}
}
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