net.dreamlu.iot.mqtt.codec.MqttMessageFactory Maven / Gradle / Ivy
/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package net.dreamlu.iot.mqtt.codec;
/**
* Utility class with factory methods to create different types of MQTT messages.
*
* @author netty
*/
public final class MqttMessageFactory {
public static MqttMessage newMessage(MqttFixedHeader mqttFixedHeader, Object variableHeader, Object payload) {
switch (mqttFixedHeader.messageType()) {
case CONNECT:
return new MqttConnectMessage(
mqttFixedHeader,
(MqttConnectVariableHeader) variableHeader,
(MqttConnectPayload) payload);
case CONNACK:
return new MqttConnAckMessage(mqttFixedHeader, (MqttConnAckVariableHeader) variableHeader);
case SUBSCRIBE:
return new MqttSubscribeMessage(
mqttFixedHeader,
(MqttMessageIdVariableHeader) variableHeader,
(MqttSubscribePayload) payload);
case SUBACK:
return new MqttSubAckMessage(
mqttFixedHeader,
(MqttMessageIdVariableHeader) variableHeader,
(MqttSubAckPayload) payload);
case UNSUBACK:
return new MqttUnsubAckMessage(
mqttFixedHeader,
(MqttMessageIdVariableHeader) variableHeader,
(MqttUnsubAckPayload) payload);
case UNSUBSCRIBE:
return new MqttUnsubscribeMessage(
mqttFixedHeader,
(MqttMessageIdVariableHeader) variableHeader,
(MqttUnsubscribePayload) payload);
case PUBLISH:
return new MqttPublishMessage(
mqttFixedHeader,
(MqttPublishVariableHeader) variableHeader,
(byte[]) payload);
case PUBACK:
//Having MqttPubReplyMessageVariableHeader or MqttMessageIdVariableHeader
return new MqttPubAckMessage(mqttFixedHeader, (MqttMessageIdVariableHeader) variableHeader);
case PUBREC:
case PUBREL:
case PUBCOMP:
//Having MqttPubReplyMessageVariableHeader or MqttMessageIdVariableHeader
return new MqttMessage(mqttFixedHeader, variableHeader);
case PINGREQ:
case PINGRESP:
return new MqttMessage(mqttFixedHeader);
case DISCONNECT:
case AUTH:
//Having MqttReasonCodeAndPropertiesVariableHeader
return new MqttMessage(mqttFixedHeader, variableHeader);
default:
throw new IllegalArgumentException("unknown message type: " + mqttFixedHeader.messageType());
}
}
public static MqttMessage newInvalidMessage(Throwable cause) {
return new MqttMessage(null, null, null, DecoderResult.failure(cause));
}
public static MqttMessage newInvalidMessage(MqttFixedHeader mqttFixedHeader, Object variableHeader,
Throwable cause) {
return new MqttMessage(mqttFixedHeader, variableHeader, null, DecoderResult.failure(cause));
}
private MqttMessageFactory() {
}
}