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MutationResult.java
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MutationResult.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.CompletionStage;
import java.util.function.Function;
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;
/**
* Result that demands persistence of a mutation event.
*
* @param <E> type of the event.
*/
public final class MutationResult<E extends Event<?>> implements Result<E> {
private final Command<?> command;
private final CompletionStage<E> eventToPersistStage;
private final CompletionStage<WithDittoHeaders> responseStage;
private final boolean becomeCreated;
private final boolean becomeDeleted;
MutationResult(final Command<?> command,
final CompletionStage<E> eventToPersistStage,
final CompletionStage<WithDittoHeaders> responseStage,
final boolean becomeCreated, final boolean becomeDeleted) {
this.command = command;
this.eventToPersistStage = eventToPersistStage;
this.responseStage = responseStage;
this.becomeCreated = becomeCreated;
this.becomeDeleted = becomeDeleted;
}
@Override
public void accept(final ResultVisitor<E> visitor) {
visitor.onMutation(command, eventToPersistStage, responseStage, becomeCreated, becomeDeleted);
}
@Override
public <F extends Event<?>> Result<F> map(final Function<CompletionStage<E>, CompletionStage<F>> mappingFunction) {
return new MutationResult<>(command, mappingFunction.apply(eventToPersistStage), responseStage, becomeCreated,
becomeDeleted);
}
@Override
public String toString() {
return this.getClass().getSimpleName() + " [" +
"command=" + command +
", eventToPersistStage=" + eventToPersistStage +
", response=" + responseStage +
", becomeCreated=" + becomeCreated +
", becomeDeleted=" + becomeDeleted +
']';
}
}