com.yahoo.jdisc.service.CurrentContainer Maven / Gradle / Ivy
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.service;
import com.yahoo.jdisc.Container;
import com.yahoo.jdisc.Request;
import com.yahoo.jdisc.application.BindingSet;
import com.yahoo.jdisc.application.BindingSetSelector;
import com.yahoo.jdisc.handler.RequestHandler;
import java.net.URI;
/**
* This interface declares a method to retrieve a reference to the current {@link Container}. Note that a {@link
* Container} which has not been {@link Container#release() closed} will actively keep it alive, preventing it
* from shutting down when expired. Failure to call close() will eventually lead to an {@link OutOfMemoryError}. A
* {@link ServerProvider} should have an instance of this class injected in its constructor, and simply use the {@link
* Request#Request(CurrentContainer, URI) appropriate Request constructor} to avoid having to worry about the keep-alive
* issue.
*
* @author Simon Thoresen Hult
*/
public interface CurrentContainer {
/**
* Returns a reference to the currently active {@link Container}. Until {@link Container#release()} has been called,
* the Container can not shut down.
*
* @param uri The identifier used to match this Request to an appropriate {@link ClientProvider} or {@link
* RequestHandler}. The hostname must be "localhost" or a fully qualified domain name.
* @param context that can be attached for reference tracking
* @return A reference to the current Container.
* @throws NoBindingSetSelectedException If no {@link BindingSet} was selected by the {@link BindingSetSelector}.
* @throws BindingSetNotFoundException If the named BindingSet was not found.
* @throws ContainerNotReadyException If no active Container was found, this can only happen during initial
* setup.
*/
default Container newReference(URI uri, Object context) {
return newReference(uri);
}
default Container newReference(URI uri) {
return newReference(uri, null);
}
}