org.dromara.mica.mqtt.core.util

Class TopicUtil

java.lang.Object

org.dromara.mica.mqtt.core.util.TopicUtil

public final class TopicUtil
extends Object

Mqtt Topic 工具

Author:

L.cm

Field Summary

Fields

Modifier and Type	Field and Description
static String	TOPIC_LAYER
static String	TOPIC_WILDCARDS_MORE
static String	TOPIC_WILDCARDS_ONE

Constructor Summary

Constructors

Constructor and Description
TopicUtil()

Method Summary

Modifier and Type	Method and Description
static Object	getFieldValue(Object obj, String fieldName) 获取字段值
static String	getTopicFilter(String topicTemplate) 获取处理完成之后的 topic，需要考虑 test/${abc}123 也要替换成 test/+ 而非 test/+123
static String[]	getTopicParts(String topic) 以 / 切分 topic，如果以 / 开头和 / 结尾会多一级，比 split 性能要好
static Map<String,String>	getTopicVars(String topicTemplate, String topic) 解析 topic 模板中的变量，不匹配时返回空 Map 例如 $SYS/brokers/${node}/clients/${clientid}/disconnected 中提取 node 和 clientid
static boolean	hasVariable(String input) 判断是否含有 ${x} 这样的变量
static boolean	match(String topicFilter, String topicName) 判断 topicFilter topicName 是否匹配
static String	resolveTopic(String topicTemplate, Object payload) 解析 topic 中的变量，变量的格式为 ${x}，x 为 payload 中的字段名
static org.tio.utils.mica.Pair<String,Integer>	retainTopicName(String topicName) 解析保留消息主题， topicName
static void	validateTopicFilter(List<String> topicFilterList) 校验 topicFilter
static void	validateTopicFilter(String topicFilter) 校验 topicFilter
static void	validateTopicName(String topicName) 校验 topicName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TOPIC_LAYER

public static final String TOPIC_LAYER

See Also:

Constant Field Values

TOPIC_WILDCARDS_ONE

public static final String TOPIC_WILDCARDS_ONE

See Also:

Constant Field Values

TOPIC_WILDCARDS_MORE

public static final String TOPIC_WILDCARDS_MORE

See Also:

Constant Field Values

Constructor Detail

TopicUtil

public TopicUtil()

Method Detail

validateTopicFilter

public static void validateTopicFilter(List<String> topicFilterList)

校验 topicFilter

Parameters:

topicFilterList - topicFilter 集合

validateTopicFilter

public static void validateTopicFilter(String topicFilter)
                                throws IllegalArgumentException

校验 topicFilter

Parameters:

topicFilter - topicFilter

Throws:

IllegalArgumentException

validateTopicName

public static void validateTopicName(String topicName)
                              throws IllegalArgumentException

校验 topicName

Parameters:

topicName - topicName

Throws:

IllegalArgumentException

retainTopicName

public static org.tio.utils.mica.Pair<String,Integer> retainTopicName(String topicName)

解析保留消息主题， topicName

Parameters:

topicName - topicName

match

public static boolean match(String topicFilter,
                            String topicName)

判断 topicFilter topicName 是否匹配

Parameters:

topicFilter - topicFilter

topicName - topicName

Returns:

是否匹配

getTopicFilter

public static String getTopicFilter(String topicTemplate)

获取处理完成之后的 topic，需要考虑 test/${abc}123 也要替换成 test/+ 而非 test/+123

Parameters:

topicTemplate - topic 模板

Returns:

获取处理完成之后的 topic

hasVariable

public static boolean hasVariable(String input)

判断是否含有 ${x} 这样的变量

Parameters:

input - input

Returns:

是否含有变量

resolveTopic

public static String resolveTopic(String topicTemplate,
                                  Object payload)

解析 topic 中的变量，变量的格式为 ${x}，x 为 payload 中的字段名

Parameters:

topicTemplate - topic 模板

payload - payload

Returns:

解析后的 topic

getFieldValue

public static Object getFieldValue(Object obj,
                                   String fieldName)

获取字段值

Parameters:

obj - obj

fieldName - fieldName

Returns:

fieldValue

getTopicParts

public static String[] getTopicParts(String topic)

以 / 切分 topic，如果以 / 开头和 / 结尾会多一级，比 split 性能要好

Parameters:

topic - topic

Returns:

part 数组

getTopicVars

public static Map<String,String> getTopicVars(String topicTemplate,
                                              String topic)

解析 topic 模板中的变量，不匹配时返回空 Map

例如 $SYS/brokers/${node}/clients/${clientid}/disconnected 中提取 node 和 clientid

Parameters:

topicTemplate - topicTemplate

topic - topic

Returns:

获取变量值