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AddHeaderMessageMapper.java
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AddHeaderMessageMapper.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.connectivity.service.messaging;
import java.util.AbstractMap;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.eclipse.ditto.base.model.headers.DittoHeaders;
import org.eclipse.ditto.base.model.headers.DittoHeadersBuilder;
import org.eclipse.ditto.connectivity.api.ExternalMessage;
import org.eclipse.ditto.connectivity.model.ConnectivityModelFactory;
import org.eclipse.ditto.connectivity.model.MappingContext;
import org.eclipse.ditto.connectivity.service.mapping.AbstractMessageMapper;
import org.eclipse.ditto.connectivity.service.mapping.DittoMessageMapper;
import org.eclipse.ditto.connectivity.service.mapping.MessageMapper;
import org.eclipse.ditto.protocol.Adaptable;
import org.mockito.Mockito;
import com.typesafe.config.Config;
import org.apache.pekko.actor.ActorSystem;
/**
* Implementation of {@link org.eclipse.ditto.connectivity.service.mapping.MessageMapper} that delegates to
* {@link org.eclipse.ditto.connectivity.service.mapping.DittoMessageMapper} and adds some headers to verify the
* custom mapping was applied.
*/
public final class AddHeaderMessageMapper extends AbstractMessageMapper {
static final String ALIAS = "header";
/**
* The context representing this mapper
*/
static final MappingContext CONTEXT = ConnectivityModelFactory.newMappingContext(ALIAS, Collections.emptyMap());
static final Map.Entry<String, String> INBOUND_HEADER =
new AbstractMap.SimpleImmutableEntry<>("inbound", "mapping");
static final Map.Entry<String, String> OUTBOUND_HEADER =
new AbstractMap.SimpleImmutableEntry<>("outbound", "mapping");
private final MessageMapper delegate = new DittoMessageMapper(Mockito.mock(ActorSystem.class), Mockito.mock(Config.class));
AddHeaderMessageMapper(final ActorSystem actorSystem, final Config config) {
super(actorSystem, config);
}
private AddHeaderMessageMapper(final AddHeaderMessageMapper copyFromMapper) {
super(copyFromMapper);
}
@Override
public String getId() {
return "header";
}
@Override
public String getAlias() {
return ALIAS;
}
@Override
public boolean isConfigurationMandatory() {
return false;
}
@Override
public MessageMapper createNewMapperInstance() {
return new AddHeaderMessageMapper(this);
}
@Override
public Collection<String> getContentTypeBlocklist() {
return Collections.emptyList();
}
@Override
public List<Adaptable> map(final ExternalMessage message) {
return delegate.map(message).stream().map(adaptable -> {
final DittoHeadersBuilder<?, ?> modifiedHeaders = DittoHeaders.newBuilder(adaptable.getDittoHeaders());
modifiedHeaders.putHeader(INBOUND_HEADER.getKey(), INBOUND_HEADER.getValue());
return adaptable.setDittoHeaders(modifiedHeaders.build());
}).toList();
}
@Override
public DittoHeaders getAdditionalInboundHeaders(final ExternalMessage message) {
return DittoHeaders.empty();
}
@Override
public List<ExternalMessage> map(final Adaptable adaptable) {
return delegate.map(adaptable)
.stream()
.map(em -> em.withHeader(OUTBOUND_HEADER.getKey(), OUTBOUND_HEADER.getValue()))
.toList();
}
@Override
public Map<String, String> getIncomingConditions() {
return Collections.emptyMap();
}
@Override
public Map<String, String> getOutgoingConditions() {
return Collections.emptyMap();
}
}