org.eclipse.ditto.connectivity.service.messaging.persistence.strategies.commands.CreateConnectionStrategy Maven / Gradle / Ivy
/*
* 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.persistence.strategies.commands;
import static org.eclipse.ditto.connectivity.model.ConnectionLifecycle.ACTIVE;
import static org.eclipse.ditto.connectivity.service.messaging.persistence.stages.ConnectionAction.BECOME_CREATED;
import static org.eclipse.ditto.connectivity.service.messaging.persistence.stages.ConnectionAction.ENABLE_LOGGING;
import static org.eclipse.ditto.connectivity.service.messaging.persistence.stages.ConnectionAction.OPEN_CONNECTION_IGNORE_ERRORS;
import static org.eclipse.ditto.connectivity.service.messaging.persistence.stages.ConnectionAction.PERSIST_AND_APPLY_EVENT;
import static org.eclipse.ditto.connectivity.service.messaging.persistence.stages.ConnectionAction.SEND_RESPONSE;
import static org.eclipse.ditto.connectivity.service.messaging.persistence.stages.ConnectionAction.UPDATE_SUBSCRIPTIONS;
import static org.eclipse.ditto.internal.utils.persistentactors.results.ResultFactory.newErrorResult;
import static org.eclipse.ditto.internal.utils.persistentactors.results.ResultFactory.newMutationResult;
import java.util.List;
import java.util.Optional;
import javax.annotation.Nullable;
import org.eclipse.ditto.base.model.entity.metadata.Metadata;
import org.eclipse.ditto.base.model.exceptions.DittoRuntimeException;
import org.eclipse.ditto.base.model.headers.WithDittoHeaders;
import org.eclipse.ditto.connectivity.model.Connection;
import org.eclipse.ditto.connectivity.model.ConnectivityStatus;
import org.eclipse.ditto.connectivity.service.messaging.persistence.stages.ConnectionAction;
import org.eclipse.ditto.connectivity.service.messaging.persistence.stages.ConnectionState;
import org.eclipse.ditto.connectivity.service.messaging.persistence.stages.StagedCommand;
import org.eclipse.ditto.internal.utils.persistentactors.results.Result;
import org.eclipse.ditto.connectivity.model.signals.commands.modify.CreateConnection;
import org.eclipse.ditto.connectivity.model.signals.commands.modify.CreateConnectionResponse;
import org.eclipse.ditto.connectivity.model.signals.events.ConnectionCreated;
import org.eclipse.ditto.connectivity.model.signals.events.ConnectivityEvent;
/**
* This strategy handles the {@link CreateConnection} command.
*/
final class CreateConnectionStrategy extends AbstractConnectivityCommandStrategy {
CreateConnectionStrategy() {
super(CreateConnection.class);
}
@Override
protected Result> doApply(final Context context,
@Nullable final Connection entity,
final long nextRevision,
final CreateConnection command,
@Nullable final Metadata metadata) {
final Connection connection = command.getConnection().toBuilder().lifecycle(ACTIVE).build();
final ConnectivityEvent event =
ConnectionCreated.of(connection, nextRevision, getEventTimestamp(), command.getDittoHeaders(),
metadata);
final WithDittoHeaders response =
CreateConnectionResponse.of(connection, command.getDittoHeaders());
final Optional validationError = validate(context, command);
if (validationError.isPresent()) {
return newErrorResult(validationError.get(), command);
} else if (connection.getConnectionStatus() == ConnectivityStatus.OPEN) {
context.getLog().withCorrelationId(command)
.debug("Connection <{}> has status <{}> and will therefore be opened.",
connection.getId(), connection.getConnectionStatus());
final List actions =
List.of(ENABLE_LOGGING, PERSIST_AND_APPLY_EVENT, BECOME_CREATED, UPDATE_SUBSCRIPTIONS,
SEND_RESPONSE, OPEN_CONNECTION_IGNORE_ERRORS);
return newMutationResult(StagedCommand.of(command, event, response, actions), event, response);
} else {
return newMutationResult(command, event, response, true, false);
}
}
}