org.eclipse.ditto.connectivity.service.messaging.persistence.strategies.commands.AbstractEphemeralStrategy 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.internal.utils.persistentactors.results.ResultFactory.newMutationResult;

import java.util.List;

import javax.annotation.Nullable;

import org.eclipse.ditto.base.model.entity.metadata.Metadata;
import org.eclipse.ditto.base.model.headers.DittoHeaders;
import org.eclipse.ditto.base.model.headers.WithDittoHeaders;
import org.eclipse.ditto.connectivity.model.Connection;
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.ConnectivityCommand;
import org.eclipse.ditto.connectivity.model.signals.events.ConnectivityEvent;

/**
 * Abstract base class for ephemeral strategies not affecting the persistence.
 *
 * @param  the type of the handled command
 */
abstract class AbstractEphemeralStrategy>
        extends AbstractConnectivityCommandStrategy {


    AbstractEphemeralStrategy(final Class theMatchingClass) {
        super(theMatchingClass);
    }

    abstract WithDittoHeaders getResponse(final ConnectionState connectionId, final DittoHeaders headers);

    abstract List getActions();

    @Override
    protected Result> doApply(final Context context,
            @Nullable final Connection connection,
            final long nextRevision,
            final C command,
            @Nullable final Metadata metadata) {

        final WithDittoHeaders response = getResponse(context.getState(), command.getDittoHeaders());
        final List actions = getActions();
        return newMutationResult(StagedCommand.of(command, null, response, actions), null, response);
    }
}