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HonoConfig.java
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HonoConfig.java
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/*
* Copyright (c) 2022 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.api;
import java.util.List;
import org.eclipse.ditto.connectivity.model.ConnectionId;
import org.eclipse.ditto.connectivity.model.Credentials;
import org.eclipse.ditto.internal.utils.akka.AkkaClassLoader;
import org.eclipse.ditto.internal.utils.config.KnownConfigValue;
import akka.actor.AbstractExtensionId;
import akka.actor.ActorSystem;
import akka.actor.ExtendedActorSystem;
import akka.actor.Extension;
/**
* Configuration interface for connection type 'Hono' parameters
* Via actor system extension, it enables different implementations per service type (Ditto/Things)
*/
public interface HonoConfig extends Extension {
/**
* Prefix in .conf files
*/
String PREFIX = "ditto.connectivity.hono-connection";
/**
* Gets the Base URI configuration value
*
* @return the connection URI
*/
String getBaseUri();
/*
*/
Boolean getValidateCertificates();
/**
* Gets the SASL mechanism of Hono-connection (Kafka specific property)
*
* @return {@link SaslMechanism}
*/
SaslMechanism getSaslMechanism();
/**
* Gets bootstrap servers
*
* @return {@link String} containing comma separated bootstrap server list
*/
String getBootstrapServers();
/**
* Gets the credentials for specified Hono-connection
*
* @param connectionId The connection ID of the connection
* @return The credentials of the connection
*/
Credentials getCredentials(ConnectionId connectionId);
/**
* Gets the Kafka GroupId property
*
* @param connectionId The connection ID of the connection
* @return GroupId
*/
String getTenantId(ConnectionId connectionId);
enum ConfigValues implements KnownConfigValue {
/**
* Base URI, including port number (without protocol prefix)
*/
BASE_URI("base-uri", ""),
/**
* validateCertificates boolean property
*/
VALIDATE_CERTIFICATES("validateCertificates", false),
/**
* SASL mechanism for connections of type Hono
*/
SASL_MECHANISM("sasl-mechanism", "plain"),
/**
* Kafka Group ID property
*/
GROUP_ID("groupId", ""),
/**
* Bootstrap servers, comma separated
*/
BOOTSTRAP_SERVERS("bootstrap-servers", ""),
/**
* Telemetry address alias
*/
TELEMETRY_ADDRESS("telemetry", ""),
/**
* Event address alias
*/
EVENT_ADDRESS("event", ""),
/**
* Command and control address alias
*/
COMMAND_AND_CONTROL_ADDRESS("commandAndControl", ""),
/**
* Command response address alias
*/
COMMAND_RESPONSE_ADDRESS("commandResponse", ""),
/**
* Username
*/
USERNAME("username", ""),
/**
* Password
*/
PASSWORD("password", "");
private final String path;
private final Object defaultValue;
ConfigValues(final String thePath, final Object theDefaultValue) {
path = thePath;
defaultValue = theDefaultValue;
}
@Override
public Object getDefaultValue() {
return defaultValue;
}
@Override
public String getConfigPath() {
return path;
}
}
/**
* Load the {@code HonoConfig} extension.
*
* @param actorSystem The actor system in which to load the configuration.
* @return the {@code HonoConfig}.
*/
static HonoConfig get(final ActorSystem actorSystem) {
return HonoConfig.ExtensionId.INSTANCE.get(actorSystem);
}
/**
* ID of the actor system extension to provide a Hono-connections configuration.
*/
final class ExtensionId extends AbstractExtensionId<HonoConfig> {
private static final String CONFIG_PATH = PREFIX + ".config-provider";
private static final ExtensionId INSTANCE = new ExtensionId();
@Override
public HonoConfig createExtension(final ExtendedActorSystem system) {
final String implementation = system.settings().config().getString(CONFIG_PATH);
return AkkaClassLoader.instantiate(system, HonoConfig.class,
implementation,
List.of(ActorSystem.class),
List.of(system));
}
}
enum SaslMechanism {
PLAIN("plain");
final String value;
SaslMechanism(String value) {
this.value = value;
}
public String getValue() {
return value;
}
}
}