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ConnectionCreatedStrategies.java
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ConnectionCreatedStrategies.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.services.connectivity.messaging.persistence.strategies.commands;
import javax.annotation.Nullable;
import org.eclipse.ditto.model.connectivity.Connection;
import org.eclipse.ditto.services.connectivity.messaging.persistence.stages.ConnectionState;
import org.eclipse.ditto.services.utils.persistentactors.commands.AbstractCommandStrategies;
import org.eclipse.ditto.services.utils.persistentactors.results.Result;
import org.eclipse.ditto.services.utils.persistentactors.results.ResultFactory;
import org.eclipse.ditto.signals.commands.connectivity.ConnectivityCommand;
import org.eclipse.ditto.signals.commands.connectivity.exceptions.ConnectionNotAccessibleException;
import org.eclipse.ditto.signals.events.connectivity.ConnectivityEvent;
/**
* Strategies to handle signals as an existing connection.
*/
public class ConnectionCreatedStrategies
extends
AbstractCommandStrategies<ConnectivityCommand<?>, Connection, ConnectionState, Result<ConnectivityEvent<?>>> {
private static final ConnectionCreatedStrategies CREATED_STRATEGIES = newCreatedStrategies();
private ConnectionCreatedStrategies() {
super(ConnectivityCommand.class);
}
/**
* @return the unique instance of this class.
*/
public static ConnectionCreatedStrategies getInstance() {
return CREATED_STRATEGIES;
}
private static ConnectionCreatedStrategies newCreatedStrategies() {
final ConnectionCreatedStrategies strategies = new ConnectionCreatedStrategies();
strategies.addStrategy(new StagedCommandStrategy());
strategies.addStrategy(new TestConnectionConflictStrategy());
strategies.addStrategy(new ConnectionConflictStrategy());
strategies.addStrategy(new ModifyConnectionStrategy());
strategies.addStrategy(new DeleteConnectionStrategy());
strategies.addStrategy(new OpenConnectionStrategy());
strategies.addStrategy(new CloseConnectionStrategy());
strategies.addStrategy(new ResetConnectionMetricsStrategy());
strategies.addStrategy(new EnableConnectionLogsStrategy());
strategies.addStrategy(new RetrieveConnectionLogsStrategy());
strategies.addStrategy(new ResetConnectionLogsStrategy());
strategies.addStrategy(new RetrieveConnectionStrategy());
strategies.addStrategy(new RetrieveConnectionStatusStrategy());
strategies.addStrategy(new RetrieveConnectionMetricsStrategy());
strategies.addStrategy(new LoggingExpiredStrategy());
return strategies;
}
@Override
public boolean isDefined(final ConnectivityCommand<?> command) {
// always defined so as to forward signals.
return true;
}
@Override
public Result<ConnectivityEvent<?>> unhandled(final Context<ConnectionState> context,
@Nullable final Connection entity,
final long nextRevision,
final ConnectivityCommand<?> command) {
return ResultFactory.newErrorResult(ConnectionNotAccessibleException
.newBuilder(context.getState().id())
.dittoHeaders(command.getDittoHeaders())
.build(), command);
}
@Override
protected Result<ConnectivityEvent<?>> getEmptyResult() {
return ResultFactory.emptyResult();
}
}