org.apache.dubbo.registry.multiple

类 MultipleRegistryServiceDiscovery

java.lang.Object

org.apache.dubbo.registry.client.AbstractServiceDiscovery

org.apache.dubbo.registry.multiple.MultipleRegistryServiceDiscovery

所有已实现的接口:

Comparable<Prioritized>, Prioritized, ServiceDiscovery

public class MultipleRegistryServiceDiscovery
extends AbstractServiceDiscovery

字段概要

字段

限定符和类型	字段和说明
static String	REGISTRY_PREFIX_KEY

从接口继承的字段 org.apache.dubbo.common.lang.Prioritized

COMPARATOR, MAX_PRIORITY, MIN_PRIORITY, NORMAL_PRIORITY

构造器概要

构造器

构造器和说明
MultipleRegistryServiceDiscovery()

方法概要

限定符和类型	方法和说明
void	addServiceInstancesChangedListener(ServiceInstancesChangedListener listener) Add an instance of ServiceInstancesChangedListener for specified service Default, current method will be invoked by the ServiceDiscoveryRegistry on the subscription, and it's mandatory to add the ServiceInstancesChangedListener argument into EventDispatcher whether the subclass implements same approach or not, thus this method is used to trigger or adapt the vendor's change notification mechanism typically, like Zookeeper Watcher, Nacos EventListener.
void	destroy() Destroy the ServiceDiscovery
void	doRegister(ServiceInstance serviceInstance) It should be implement in kinds of service discovers.
void	doUpdate(ServiceInstance serviceInstance) It should be implement in kinds of service discovers.
Page<ServiceInstance>	getInstances(String serviceName, int offset, int pageSize, boolean healthyOnly) Get the pagination of service instances by the specified service name.
ServiceInstance	getLocalInstance()
Set<String>	getServices() Gets all service names
URL	getUrl()
void	initialize(URL registryURL) Initializes the ServiceDiscovery
void	unregister(ServiceInstance serviceInstance) Unregisters an instance of ServiceInstance.

从类继承的方法 org.apache.dubbo.registry.client.AbstractServiceDiscovery

register, update

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.dubbo.registry.client.ServiceDiscovery

dispatchServiceInstancesChangedEvent, dispatchServiceInstancesChangedEvent, dispatchServiceInstancesChangedEvent, dispatchServiceInstancesChangedEvent, getDefaultPageSize, getInstances, getInstances, getInstances, removeServiceInstancesChangedListener, toString

从接口继承的方法 org.apache.dubbo.common.lang.Prioritized

compareTo, getPriority

字段详细资料

REGISTRY_PREFIX_KEY

public static final String REGISTRY_PREFIX_KEY

另请参阅:

常量字段值

构造器详细资料

MultipleRegistryServiceDiscovery

public MultipleRegistryServiceDiscovery()

方法详细资料

initialize

public void initialize(URL registryURL)
                throws Exception

从接口复制的说明: ServiceDiscovery

Initializes the ServiceDiscovery

参数:

registryURL - the url to connect service registry

抛出:

Exception - If met with error

getUrl

public URL getUrl()

destroy

public void destroy()
             throws Exception

从接口复制的说明: ServiceDiscovery

Destroy the ServiceDiscovery

抛出:

Exception - If met with error

doRegister

public void doRegister(ServiceInstance serviceInstance)

从类复制的说明: AbstractServiceDiscovery

It should be implement in kinds of service discovers.

指定者:

doRegister 在类中 AbstractServiceDiscovery

doUpdate

public void doUpdate(ServiceInstance serviceInstance)

从类复制的说明: AbstractServiceDiscovery

It should be implement in kinds of service discovers.

指定者:

doUpdate 在类中 AbstractServiceDiscovery

unregister

public void unregister(ServiceInstance serviceInstance)
                throws RuntimeException

从接口复制的说明: ServiceDiscovery

Unregisters an instance of ServiceInstance.

参数:

serviceInstance - an instance of ServiceInstance to be unregistered

抛出:

RuntimeException - if failed

addServiceInstancesChangedListener

public void addServiceInstancesChangedListener(ServiceInstancesChangedListener listener)
                                        throws NullPointerException,
                                               IllegalArgumentException

从接口复制的说明: ServiceDiscovery

Add an instance of ServiceInstancesChangedListener for specified service

Default, current method will be invoked by the ServiceDiscoveryRegistry on the subscription, and it's mandatory to add the ServiceInstancesChangedListener argument into EventDispatcher whether the subclass implements same approach or not, thus this method is used to trigger or adapt the vendor's change notification mechanism typically, like Zookeeper Watcher, Nacos EventListener. If the registry observes the change, It's suggested that the implementation could invoke ServiceDiscovery.dispatchServiceInstancesChangedEvent(String) method or variants

参数:

listener - an instance of ServiceInstancesChangedListener

抛出:

NullPointerException

IllegalArgumentException

另请参阅:

EventPublishingServiceDiscovery, EventDispatcher

getInstances

public Page<ServiceInstance> getInstances(String serviceName,
                                          int offset,
                                          int pageSize,
                                          boolean healthyOnly)
                                   throws NullPointerException,
                                          IllegalArgumentException,
                                          UnsupportedOperationException

从接口复制的说明: ServiceDiscovery

Get the pagination of service instances by the specified service name. If healthyOnly == true, filter healthy instances only.

参数:

serviceName - the service name

offset - the offset of request , the number "0" indicates first page

pageSize - the number of request, the max value indicates the range is unlimited

healthyOnly - if true , filter healthy instances only

返回:

non-null Page object

抛出:

NullPointerException - if serviceName is null

IllegalArgumentException - if offset or pageSize is negative number

UnsupportedOperationException - if not supported

getServices

public Set<String> getServices()

从接口复制的说明: ServiceDiscovery

Gets all service names

返回:

non-null read-only Set

getLocalInstance

public ServiceInstance getLocalInstance()

指定者:

getLocalInstance 在接口中 ServiceDiscovery

覆盖:

getLocalInstance 在类中 AbstractServiceDiscovery