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ResultFactory.java
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ResultFactory.java
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/*
* Copyright (c) 2019 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.internal.utils.persistentactors.results;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.base.model.exceptions.DittoRuntimeException;
import org.eclipse.ditto.base.model.headers.WithDittoHeaders;
import org.eclipse.ditto.base.model.signals.commands.Command;
import org.eclipse.ditto.base.model.signals.events.Event;
/**
* A factory for creating {@link Result} instances.
*/
@Immutable
public final class ResultFactory {
private ResultFactory() {
throw new AssertionError();
}
/**
* Create a mutation result.
*
* @param command command that caused the mutation.
* @param eventToPersist event of the mutation.
* @param response response of the command.
* @param <E> type of the event.
* @return the result.
*/
public static <E extends Event<?>> Result<E> newMutationResult(final Command<?> command, final E eventToPersist,
final WithDittoHeaders response) {
return newMutationResult(command, CompletableFuture.completedStage(eventToPersist),
CompletableFuture.completedStage(response));
}
/**
* Create a mutation result.
*
* @param command command that caused the mutation.
* @param eventToPersist event of the mutation.
* @param response response of the command.
* @param <E> type of the event.
* @return the result.
*/
public static <E extends Event<?>> Result<E> newMutationResult(final Command<?> command,
final CompletionStage<E> eventToPersist,
final CompletionStage<WithDittoHeaders> response) {
return new MutationResult<>(command, eventToPersist, response, false, false);
}
/**
* Create a mutation result.
*
* @param command command that caused the mutation.
* @param eventToPersist event of the mutation.
* @param response response of the command.
* @param becomeCreated whether the actor should behave as if the entity is created.
* @param becomeDeleted whether the actor should behave as if the entity is deleted.
* @param <E> type of the event.
* @return the result.
*/
public static <E extends Event<?>> Result<E> newMutationResult(final Command<?> command,
final E eventToPersist,
final WithDittoHeaders response,
final boolean becomeCreated,
final boolean becomeDeleted) {
return newMutationResult(command, CompletableFuture.completedStage(eventToPersist),
CompletableFuture.completedStage(response), becomeCreated, becomeDeleted);
}
/**
* Create a mutation result.
*
* @param command command that caused the mutation.
* @param eventToPersist event of the mutation.
* @param response response of the command.
* @param becomeCreated whether the actor should behave as if the entity is created.
* @param becomeDeleted whether the actor should behave as if the entity is deleted.
* @param <E> type of the event.
* @return the result.
*/
public static <E extends Event<?>> Result<E> newMutationResult(final Command<?> command,
final CompletionStage<E> eventToPersist,
final CompletionStage<WithDittoHeaders> response,
final boolean becomeCreated,
final boolean becomeDeleted) {
return new MutationResult<>(command, eventToPersist, response, becomeCreated, becomeDeleted);
}
/**
* Create an error result.
*
* @param dittoRuntimeException the error.
* @param errorCausingCommand the command that caused the error.
* @param <E> type of events (irrelevant).
* @return the result.
*/
public static <E extends Event<?>> Result<E> newErrorResult(final DittoRuntimeException dittoRuntimeException,
final Command<?> errorCausingCommand) {
return new ErrorResult<>(dittoRuntimeException, errorCausingCommand);
}
/**
* Create a query result.
*
* @param command the query command.
* @param response the response.
* @param <E> type of events (irrelevant).
* @return the result.
*/
public static <E extends Event<?>> Result<E> newQueryResult(final Command<?> command,
final WithDittoHeaders response) {
return new QueryResult<>(command, response);
}
/**
* Get the empty result.
*
* @param <E> type of events (irrelevant).
* @return the empty result.
*/
public static <E extends Event<?>> Result<E> emptyResult() {
return EmptyResult.getInstance();
}
}