AbstractRegistry (Apache Dubbo 2.7.5 API)

java.lang.Object
- org.apache.dubbo.registry.support.AbstractRegistry

All Implemented Interfaces:

Node, Registry, RegistryService

Direct Known Subclasses:

FailbackRegistry
```
public abstract class AbstractRegistry
extends Object
implements Registry
```
AbstractRegistry. (SPI, Prototype, ThreadSafe)

Constructor Summary

Constructors
Constructor and Description

AbstractRegistry(URL url)

Constructors
Constructor and Description
`AbstractRegistry(URL url)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`destroy()`
`void`	`doSaveProperties(long version)`
`File`	`getCacheFile()`
`Properties`	`getCacheProperties()`
`List<URL>`	`getCacheUrls(URL url)`
`AtomicLong`	`getLastCacheChanged()`
`Map<URL,Map<String,List<URL>>>`	`getNotified()`
`Set<URL>`	`getRegistered()`
`Map<URL,Set<NotifyListener>>`	`getSubscribed()`
`URL`	`getUrl()`
`List<URL>`	`lookup(URL url)` Query the registered data that matches the conditions.
`void`	`register(URL url)` Register data, such as : provider service, consumer address, route rule, override rule and other data.
`void`	`subscribe(URL url, NotifyListener listener)` Subscribe to eligible registered data and automatically push when the registered data is changed.
`String`	`toString()`
`void`	`unregister(URL url)` Unregister
`void`	`unsubscribe(URL url, NotifyListener listener)` Unsubscribe

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

Methods inherited from interface org.apache.dubbo.common.Node
isAvailable

- Constructor Detail
  - AbstractRegistry
```
public AbstractRegistry(URL url)
```
- Method Detail
  - getUrl
```
public URL getUrl()
```
    Specified by:
    
    getUrl in interface Node
  - getRegistered
```
public Set<URL> getRegistered()
```
  - getSubscribed
```
public Map<URL,Set<NotifyListener>> getSubscribed()
```
  - getNotified
```
public Map<URL,Map<String,List<URL>>> getNotified()
```
  - getCacheFile
```
public File getCacheFile()
```
  - getCacheProperties
```
public Properties getCacheProperties()
```
  - getLastCacheChanged
```
public AtomicLong getLastCacheChanged()
```
  - doSaveProperties
```
public void doSaveProperties(long version)
```
  - getCacheUrls
```
public List<URL> getCacheUrls(URL url)
```
  - lookup
```
public List<URL> lookup(URL url)
```
    Description copied from interface: RegistryService
    
    Query the registered data that matches the conditions. Corresponding to the push mode of the subscription, this is the pull mode and returns only one result.
    
    Specified by:
    
    lookup in interface RegistryService
    
    Parameters:
    
    url - Query condition, is not allowed to be empty, e.g. consumer://10.20.153.10/org.apache.dubbo.foo.BarService?version=1.0.0&application=kylin
    
    Returns:
    
    The registered information list, which may be empty, the meaning is the same as the parameters of org.apache.dubbo.registry.NotifyListener#notify(List).
    
    See Also:
    
    NotifyListener.notify(List)
  - register
```
public void register(URL url)
```
    Description copied from interface: RegistryService
    
    Register data, such as : provider service, consumer address, route rule, override rule and other data.
    Registering is required to support the contract:
    1. When the URL sets the check=false parameter. When the registration fails, the exception is not thrown and retried in the background. Otherwise, the exception will be thrown.
    2. When URL sets the dynamic=false parameter, it needs to be stored persistently, otherwise, it should be deleted automatically when the registrant has an abnormal exit.
    3. When the URL sets category=routers, it means classified storage, the default category is providers, and the data can be notified by the classified section.
    4. When the registry is restarted, network jitter, data can not be lost, including automatically deleting data from the broken line.
    5. Allow URLs which have the same URL but different parameters to coexist,they can't cover each other.
    
    Specified by:
    
    register in interface RegistryService
    
    Parameters:
    
    url - Registration information , is not allowed to be empty, e.g: dubbo://10.20.153.10/org.apache.dubbo.foo.BarService?version=1.0.0&application=kylin
  - unregister
```
public void unregister(URL url)
```
    Description copied from interface: RegistryService
    
    Unregister
    Unregistering is required to support the contract:
    1. If it is the persistent stored data of dynamic=false, the registration data can not be found, then the IllegalStateException is thrown, otherwise it is ignored.
    2. Unregister according to the full url match.
    
    Specified by:
    
    unregister in interface RegistryService
    
    Parameters:
    
    url - Registration information , is not allowed to be empty, e.g: dubbo://10.20.153.10/org.apache.dubbo.foo.BarService?version=1.0.0&application=kylin
  - subscribe
```
public void subscribe(URL url,
                      NotifyListener listener)
```
    Description copied from interface: RegistryService
    
    Subscribe to eligible registered data and automatically push when the registered data is changed.
    Subscribing need to support contracts:
    1. When the URL sets the check=false parameter. When the registration fails, the exception is not thrown and retried in the background.
    2. When URL sets category=routers, it only notifies the specified classification data. Multiple classifications are separated by commas, and allows asterisk to match, which indicates that all categorical data are subscribed.
    3. Allow interface, group, version, and classifier as a conditional query, e.g.: interface=org.apache.dubbo.foo.BarService&version=1.0.0
    4. And the query conditions allow the asterisk to be matched, subscribe to all versions of all the packets of all interfaces, e.g. :interface=*&group=*&version=*&classifier=*
    5. When the registry is restarted and network jitter, it is necessary to automatically restore the subscription request.
    6. Allow URLs which have the same URL but different parameters to coexist,they can't cover each other.
    7. The subscription process must be blocked, when the first notice is finished and then returned.
    
    Specified by:
    
    subscribe in interface RegistryService
    
    Parameters:
    
    url - Subscription condition, not allowed to be empty, e.g. consumer://10.20.153.10/org.apache.dubbo.foo.BarService?version=1.0.0&application=kylin
    
    listener - A listener of the change event, not allowed to be empty
  - unsubscribe
```
public void unsubscribe(URL url,
                        NotifyListener listener)
```
    Description copied from interface: RegistryService
    
    Unsubscribe
    Unsubscribing is required to support the contract:
    1. If don't subscribe, ignore it directly.
    2. Unsubscribe by full URL match.
    
    Specified by:
    
    unsubscribe in interface RegistryService
    
    Parameters:
    
    url - Subscription condition, not allowed to be empty, e.g. consumer://10.20.153.10/org.apache.dubbo.foo.BarService?version=1.0.0&application=kylin
    
    listener - A listener of the change event, not allowed to be empty
  - destroy
```
public void destroy()
```
    Specified by:
    
    destroy in interface Node
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class AbstractRegistry

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.apache.dubbo.common.Node

Constructor Detail

AbstractRegistry

Method Detail

getUrl

getRegistered

getSubscribed

getNotified

getCacheFile

getCacheProperties

getLastCacheChanged

doSaveProperties

getCacheUrls

lookup

register

unregister

subscribe

unsubscribe

destroy

toString