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ConnectivityAnnouncementSignalMapper.java
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ConnectivityAnnouncementSignalMapper.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.protocol.mapper;
import org.eclipse.ditto.connectivity.model.signals.announcements.ConnectionClosedAnnouncement;
import org.eclipse.ditto.connectivity.model.signals.announcements.ConnectionOpenedAnnouncement;
import org.eclipse.ditto.connectivity.model.signals.announcements.ConnectivityAnnouncement;
import org.eclipse.ditto.json.JsonObject;
import org.eclipse.ditto.protocol.PayloadBuilder;
import org.eclipse.ditto.protocol.ProtocolFactory;
import org.eclipse.ditto.protocol.TopicPath;
/**
* Signal mapper implementation for {@link ConnectivityAnnouncement}s.
*
* @since 2.1.0
*/
final class ConnectivityAnnouncementSignalMapper extends AbstractSignalMapper<ConnectivityAnnouncement<?>> {
@Override
TopicPath getTopicPath(final ConnectivityAnnouncement<?> signal, final TopicPath.Channel channel) {
return ProtocolFactory.newTopicPathBuilderFromName(signal.getEntityId().toString())
.connections()
.announcements()
.name(signal.getName())
.build();
}
@Override
void enhancePayloadBuilder(final ConnectivityAnnouncement<?> signal, final PayloadBuilder payloadBuilder) {
if (signal instanceof ConnectionOpenedAnnouncement) {
final ConnectionOpenedAnnouncement announcement = (ConnectionOpenedAnnouncement) signal;
final JsonObject payload = getConnectionOpenedAnnouncementPayload(announcement);
payloadBuilder.withValue(payload).build();
}
if (signal instanceof ConnectionClosedAnnouncement) {
final ConnectionClosedAnnouncement announcement = (ConnectionClosedAnnouncement) signal;
final JsonObject payload = getConnectionClosedAnnouncementPayload(announcement);
payloadBuilder.withValue(payload).build();
}
// otherwise be tolerant and don't expand payload instead of throwing an exception
}
private static JsonObject getConnectionOpenedAnnouncementPayload(final ConnectionOpenedAnnouncement announcement) {
return JsonObject.newBuilder()
.set(ConnectionOpenedAnnouncement.JsonFields.OPENED_AT, announcement.getOpenedAt().toString())
.build();
}
private static JsonObject getConnectionClosedAnnouncementPayload(final ConnectionClosedAnnouncement announcement) {
return JsonObject.newBuilder()
.set(ConnectionClosedAnnouncement.JsonFields.CLOSED_AT, announcement.getClosedAt().toString())
.build();
}
}