WritableMetadataService (Apache Dubbo 3.0.0 API)

所有超级接口:

MetadataService

所有已知实现类:

AbstractAbstractWritableMetadataService, InMemoryWritableMetadataService
```
@SPI("default")
public interface WritableMetadataService
extends MetadataService
```
Local MetadataService that extends MetadataService and provides the modification, which is used for Dubbo's consumers and providers.

从以下版本开始:

2.7.5

字段概要
- 从接口继承的字段 org.apache.dubbo.metadata.MetadataService
  ALL_SERVICE_INTERFACES, ALL_SERVICE_NAMES, DEFAULT_EXTENSION, SERVICE_INTERFACE_NAME, VERSION

方法概要

所有方法静态方法实例方法抽象方法默认方法
修饰符和类型	方法	说明
`boolean`	`exportURL(URL url)`	Exports a `URL`
`Map<String,Set<String>>`	`getCachedMapping()`
`Set<String>`	`getCachedMapping(String mappingKey)`
`Set<String>`	`getCachedMapping(URL consumerURL)`
`static WritableMetadataService`	`getDefaultExtension()`	Get `the defautl extension` of `WritableMetadataService`
`MetadataInfo`	`getDefaultMetadataInfo()`
`default URL`	`getMetadataServiceURL()`
`void`	`publishServiceDefinition(URL providerUrl)`
`void`	`putCachedMapping(String serviceKey, Set<String> apps)`
`Set<String>`	`removeCachedMapping(String serviceKey)`
`default String`	`serviceName()`	Gets the current Dubbo Service name
`default void`	`setMetadataServiceURL(URL url)`
`boolean`	`subscribeURL(URL url)`	Subscribes a `URL`
`boolean`	`unexportURL(URL url)`	Unexports a `URL`
`boolean`	`unsubscribeURL(URL url)`	Unsubscribes a `URL`

从接口继承的方法 org.apache.dubbo.metadata.MetadataService
exportInstanceMetadata, getAndListenInstanceMetadata, getExportedServiceURLs, getExportedURLs, getExportedURLs, getExportedURLs, getExportedURLs, getExportedURLs, getInstanceMetadataChangedListenerMap, getMetadataInfo, getMetadataInfos, getServiceDefinition, getServiceDefinition, getSubscribedURLs, version

方法详细资料

serviceName
```
default String serviceName()
```
Gets the current Dubbo Service name

指定者:

serviceName 在接口中 MetadataService

返回:

non-null

exportURL
```
boolean exportURL(URL url)
```
Exports a URL

参数:

url - a URL

返回:

If success , return true

unexportURL
```
boolean unexportURL(URL url)
```
Unexports a URL

参数:

url - a URL

返回:

If success , return true

subscribeURL
```
boolean subscribeURL(URL url)
```
Subscribes a URL

参数:

url - a URL

返回:

If success , return true

unsubscribeURL
```
boolean unsubscribeURL(URL url)
```
Unsubscribes a URL

参数:

url - a URL

返回:

If success , return true

publishServiceDefinition

void publishServiceDefinition(URL providerUrl)

setMetadataServiceURL

default void setMetadataServiceURL(URL url)

getMetadataServiceURL
```
default URL getMetadataServiceURL()
```

putCachedMapping

void putCachedMapping(String serviceKey,
                      Set<String> apps)

getCachedMapping

Set<String> getCachedMapping(String mappingKey)

getCachedMapping

Set<String> getCachedMapping(URL consumerURL)

removeCachedMapping

Set<String> removeCachedMapping(String serviceKey)

getCachedMapping

Map<String,Set<String>> getCachedMapping()

getDefaultMetadataInfo
```
MetadataInfo getDefaultMetadataInfo()
```

getDefaultExtension
```
static WritableMetadataService getDefaultExtension()
```
Get the defautl extension of WritableMetadataService

返回:

non-null