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HonoAddressAlias.java
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HonoAddressAlias.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.model;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
/**
* Possible address aliases used by connections of type 'Hono'
*/
public enum HonoAddressAlias {
/**
* telemetry address alias
*/
TELEMETRY("telemetry"),
/**
* event address alias
*/
EVENT("event"),
/**
* command&control address alias
*/
COMMAND("command"),
/**
* command response address alias
*/
COMMAND_RESPONSE("command_response");
private final String name;
private static final Map<String, HonoAddressAlias> HONO_ADDRESS_ALIAS_MAP;
static {
Map<String, HonoAddressAlias> map = new ConcurrentHashMap<>();
for (HonoAddressAlias alias : HonoAddressAlias.values()) {
map.put(alias.getName(), alias);
}
HONO_ADDRESS_ALIAS_MAP = Collections.unmodifiableMap(map);
}
HonoAddressAlias(String name) {
this.name = name;
}
/**
* Gets the name of the alias
*
* @return The name of the alias
*/
public String getName() {
return name;
}
/**
* Returns all defined HonoAddressAlias names
*
* @return A list with HonoAddressAlias names
*/
public static List<String> names() {
return new ArrayList<>(HONO_ADDRESS_ALIAS_MAP.keySet());
}
/**
* Returns the HonoAddressAlias to which the given name is mapped
*
* @param name of HonoAddressAlias
* @return the HonoAddressAlias to which the given name is mapped
*/
public static Optional<HonoAddressAlias> fromName(String name) {
try {
return Optional.of(HONO_ADDRESS_ALIAS_MAP.get(name));
} catch (NullPointerException | ClassCastException ex) {
return Optional.empty();
}
}
/**
* Resolves the input as a potential address alias or returns empty string if not an existing alias.
*
* @param alias the alias name to resolve
* @param tenantId the tenantId - used in the resolve pattern
* @param thingSuffix if true, adds '/{{thing:id}}' suffix on resolve - needed for replyTarget addresses
* if false - does not add suffix
* @return the resolved alias or empty if not an alias
*/
public static String resolve(String alias, String tenantId, boolean thingSuffix) {
String suffix = thingSuffix ? "/{{thing:id}}" : "";
return fromName(alias)
.map(found -> "hono." + found.getName() + (tenantId.isEmpty() ? "" : "." + tenantId) + suffix)
.orElse(alias);
}
/**
* Resolves the input as a potential address alias or returns empty string if not an existing aliass.
*
* @param alias the alias name to resolve
* @param tenantId the tenantId - used in the resolve pattern
* @return the resolved alias or empty if not an alias
*/
public static String resolve(String alias, String tenantId) throws IllegalArgumentException {
return resolve(alias, tenantId, false);
}
}