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MessageCommandAckRequestSetter.java
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MessageCommandAckRequestSetter.java
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/*
* Copyright (c) 2020 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.edge.service.acknowledgements.message;
import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.base.model.acks.AbstractCommandAckRequestSetter;
import org.eclipse.ditto.base.model.acks.DittoAcknowledgementLabel;
import org.eclipse.ditto.messages.model.signals.commands.MessageCommand;
/**
* This UnaryOperator accepts a MessageCommand and checks whether its DittoHeaders should be extended by an
* {@link org.eclipse.ditto.base.model.acks.AcknowledgementRequest} for {@link org.eclipse.ditto.base.model.acks.DittoAcknowledgementLabel#LIVE_RESPONSE}.
* <p>
* If so, the result is a new command with extended headers, else the same command is returned.
* </p>
*
* @since 1.2.0
*/
@Immutable
public final class MessageCommandAckRequestSetter extends AbstractCommandAckRequestSetter<MessageCommand<?, ?>> {
private static final MessageCommandAckRequestSetter INSTANCE = new MessageCommandAckRequestSetter();
private MessageCommandAckRequestSetter() {
super(DittoAcknowledgementLabel.LIVE_RESPONSE);
}
/**
* Returns an instance of {@code MessageCommandAckRequestSetter}.
*
* @return the instance.
*/
public static MessageCommandAckRequestSetter getInstance() {
return INSTANCE;
}
@Override
public boolean isApplicable(final MessageCommand<?, ?> command) {
checkNotNull(command, "command");
return true;
}
@Override
@SuppressWarnings({"unchecked", "rawtypes", "java:S3740"})
public Class<MessageCommand<?, ?>> getMatchedClass() {
return (Class) MessageCommand.class;
}
@Override
protected boolean isBindResponseRequiredToAddingRemovingImplicitLabel() {
return true;
}
}