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Make CachingSignalEnrichmentFacadeProvider a DittoExtensionPoint used
in the search service Signed-off-by: Yannic Klem <yannic.klem@bosch.io>
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...hingsearch/service/persistence/write/streaming/CachingSignalEnrichmentFacadeProvider.java
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| /* | ||
| * Copyright (c) 2021 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.thingsearch.service.persistence.write.streaming; | ||
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| import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull; | ||
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| import java.util.concurrent.Executor; | ||
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| import org.eclipse.ditto.base.service.DittoExtensionIds; | ||
| import org.eclipse.ditto.base.service.DittoExtensionPoint; | ||
| import org.eclipse.ditto.internal.models.signalenrichment.CachingSignalEnrichmentFacade; | ||
| import org.eclipse.ditto.internal.models.signalenrichment.SignalEnrichmentFacade; | ||
| import org.eclipse.ditto.internal.utils.cache.config.CacheConfig; | ||
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| import com.typesafe.config.Config; | ||
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| import akka.actor.ActorSystem; | ||
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| /** | ||
| * Caching signal enrichment facade to be loaded by reflection. | ||
| * Can be used as an extension point to use custom signal enrichment. | ||
| * Implementations MUST have a public constructor taking an actorSystem and a Config as argument. | ||
| */ | ||
| public interface CachingSignalEnrichmentFacadeProvider extends DittoExtensionPoint { | ||
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| /** | ||
| * Returns a the {@link org.eclipse.ditto.internal.models.signalenrichment.SignalEnrichmentFacade} loaded by reflection. | ||
| * | ||
| * @param actorSystem the actorSystem the signal enrichment facade provider belongs to. | ||
| * @param cacheLoaderFacade the facade whose argument-result-pairs we are caching. | ||
| * @param cacheConfig the cache configuration to use for the cache. | ||
| * @param cacheLoaderExecutor the executor to use in order to asynchronously load cache entries. | ||
| * @param cacheNamePrefix the prefix to use as cacheName of the cache. | ||
| * @throws NullPointerException if any argument is null. | ||
| */ | ||
| CachingSignalEnrichmentFacade getSignalEnrichmentFacade( | ||
| final ActorSystem actorSystem, | ||
| final SignalEnrichmentFacade cacheLoaderFacade, | ||
| final CacheConfig cacheConfig, | ||
| final Executor cacheLoaderExecutor, | ||
| final String cacheNamePrefix); | ||
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| /** | ||
| * Loads the implementation of {@code CachingSignalEnrichmentFacade} which is configured for the | ||
| * {@code ActorSystem}. | ||
| * | ||
| * @param actorSystem the actorSystem in which the {@code CachingSignalEnrichmentFacade} should be loaded. | ||
| * @param config the config the extension is configured. | ||
| * @return the {@code CachingSignalEnrichmentFacade} implementation. | ||
| * @throws NullPointerException if {@code actorSystem} is {@code null}. | ||
| */ | ||
| static CachingSignalEnrichmentFacadeProvider get(final ActorSystem actorSystem, final Config config) { | ||
| checkNotNull(actorSystem, "actorSystem"); | ||
| checkNotNull(config, "config"); | ||
| final var extensionIdConfig = ExtensionId.computeConfig(config); | ||
| return DittoExtensionIds.get(actorSystem) | ||
| .computeIfAbsent(extensionIdConfig, ExtensionId::new) | ||
| .get(actorSystem); | ||
| } | ||
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| final class ExtensionId extends DittoExtensionPoint.ExtensionId<CachingSignalEnrichmentFacadeProvider> { | ||
| private static final String CONFIG_KEY = "caching-signal-enrichment-facade-provider"; | ||
| private static final String CONFIG_PATH = "ditto.extensions." + CONFIG_KEY; | ||
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| private ExtensionId(final ExtensionIdConfig<CachingSignalEnrichmentFacadeProvider> extensionIdConfig) { | ||
| super(extensionIdConfig); | ||
| } | ||
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| static ExtensionIdConfig<CachingSignalEnrichmentFacadeProvider> computeConfig(final Config config) { | ||
| return ExtensionIdConfig.of(CachingSignalEnrichmentFacadeProvider.class, config, CONFIG_KEY); | ||
| } | ||
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| @Override | ||
| protected String getConfigPath() { | ||
| return CONFIG_PATH; | ||
| } | ||
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| } | ||
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| } |
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