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HttpBindFlowProvider.java
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HttpBindFlowProvider.java
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/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.gateway.service.endpoints.routes;
import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull;
import org.eclipse.ditto.base.service.DittoExtensionPoint;
import org.eclipse.ditto.gateway.service.util.config.DittoGatewayConfig;
import org.eclipse.ditto.internal.utils.config.DefaultScopedConfig;
import akka.NotUsed;
import akka.actor.ActorSystem;
import akka.http.javadsl.model.HttpRequest;
import akka.http.javadsl.model.HttpResponse;
import akka.http.javadsl.server.Route;
import akka.stream.javadsl.Flow;
/**
* Extension to add a custom bind flow for HTTP requests.
* @since 3.0.0
*/
public abstract class HttpBindFlowProvider extends DittoExtensionPoint {
/**
* @param actorSystem the actor system in which to load the extension.
*/
protected HttpBindFlowProvider(final ActorSystem actorSystem) {
super(actorSystem);
}
/**
* Create a bind flow for HTTP requests.
*
* @return flow which processes HTTP requests.
*/
public abstract Flow<HttpRequest, HttpResponse, NotUsed> getFlow(final Route innerRoute);
/**
* Loads the implementation of {@code HttpBindFlowProvider} which is configured for the
* {@code ActorSystem}.
*
* @param actorSystem the actorSystem in which the {@code HttpBindFlowProvider} should be loaded.
* @return the {@code HttpBindFlowProvider} implementation.
* @throws NullPointerException if {@code actorSystem} is {@code null}.
*/
public static HttpBindFlowProvider get(final ActorSystem actorSystem) {
checkNotNull(actorSystem, "actorSystem");
final var implementation = DittoGatewayConfig.of(DefaultScopedConfig.dittoScoped(
actorSystem.settings().config())).getHttpConfig().getBindFlowProvider();
return new ExtensionId<>(implementation, HttpBindFlowProvider.class).get(actorSystem);
}
}