MqttTopicSubscription (Netty/Codec/MQTT 4.2.9.Final API)

java.lang.Object
- io.netty.handler.codec.mqtt.MqttTopicSubscription

```
public final class MqttTopicSubscription
extends Object
```
Contains a topic name and Qos Level. This is part of the MqttSubscribePayload

Constructor Summary

Constructors
Constructor	Description
`MqttTopicSubscription(String topicFilter, MqttQoS qualityOfService)`
`MqttTopicSubscription(String topicFilter, MqttSubscriptionOption option)`

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`MqttSubscriptionOption`	`option()`
`MqttQoS`	`qualityOfService()`
`void`	`setTopicFilter(String topicFilter)`	Rewrite topic filter.
`String`	`topicFilter()`
`String`	`topicName()`	Deprecated. use topicFilter
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

MqttTopicSubscription

public MqttTopicSubscription(String topicFilter,
                             MqttQoS qualityOfService)

MqttTopicSubscription

public MqttTopicSubscription(String topicFilter,
                             MqttSubscriptionOption option)

Method Detail
- topicName
```
@Deprecated
public String topicName()
```
  Deprecated.
  use topicFilter
- topicFilter
```
public String topicFilter()
```
- setTopicFilter
```
public void setTopicFilter(String topicFilter)
```
  Rewrite topic filter.
  Many IoT devices do not support reconfiguration or upgrade, so it is hard to change their subscribed topics. To resolve this issue, MQTT server may offer topic rewrite capability.
  
  Parameters:
  
  topicFilter - Topic to rewrite to
- qualityOfService
```
public MqttQoS qualityOfService()
```
- option
```
public MqttSubscriptionOption option()
```
- toString
```
public String toString()
```
  Overrides:
  
  toString in class Object