com.tencent.polaris.plugins.router.metadata

Class MetadataRouter

java.lang.Object

com.tencent.polaris.api.control.Destroyable

com.tencent.polaris.plugins.router.common.AbstractServiceRouter

com.tencent.polaris.plugins.router.metadata.MetadataRouter

All Implemented Interfaces:

PluginConfigProvider, IdAwarePlugin, Plugin, ServiceRouter

public class MetadataRouter
extends AbstractServiceRouter
implements PluginConfigProvider

正常场景：选出的实例子集不为空，那么优先返回健康子集，如果全部不健康则进行全死全活返回不健康子集。 异常场景：需要根据GetOneInstanceRequest的请求策略进行降级决策 不降级（默认）：返回未找到实例错误 返回所有节点：优先返回服务下的健康子集，如果全部不健康则全死全活返回不健康子集 返回实例元数据不包含请求metadata的key的节点：优先返回筛选出的健康子集，如果全部不健康则返回不健康子集 例如：ip1 set=1 ; ip2 set=2 ; ip3 ; 请求时 set=0 返回的 ip3（这个时候只判断key） 降级使用指定metadata进行实例筛选。(未实现)

Author:

starkwen

Date:

2021/2/24 下午3:23

Nested Class Summary

Nested classes/interfaces inherited from interface com.tencent.polaris.api.plugin.route.ServiceRouter

ServiceRouter.Aspect

Field Summary

Fields

Modifier and Type	Field and Description
static String	ROUTER_TYPE_METADATA

Constructor Summary

Constructors

Constructor and Description
MetadataRouter()

Method Summary

Modifier and Type	Method and Description
boolean	enable(RouteInfo routeInfo, ServiceMetadata dstSvcInfo)
ServiceRouter.Aspect	getAspect()
MetadataRouterConfig	getConfig()
String	getName()
Class<? extends Verifier>	getPluginConfigClazz()
PluginType	getType()
void	init(InitContext ctx)
RouteResult	router(RouteInfo routeInfo, ServiceInstances instances)

Methods inherited from class com.tencent.polaris.plugins.router.common.AbstractServiceRouter

getFilteredInstances, getId, postContextInit, setId

Methods inherited from class com.tencent.polaris.api.control.Destroyable

destroy, isDestroyed

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.tencent.polaris.api.plugin.Plugin

destroy

Field Detail

ROUTER_TYPE_METADATA

public static final String ROUTER_TYPE_METADATA

See Also:

Constant Field Values

Constructor Detail

MetadataRouter

public MetadataRouter()

Method Detail

router

public RouteResult router(RouteInfo routeInfo,
                          ServiceInstances instances)
                   throws PolarisException

Specified by:

router in class AbstractServiceRouter

Throws:

PolarisException

getType

public PluginType getType()

Specified by:

getType in interface Plugin

Overrides:

getType in class AbstractServiceRouter

init

public void init(InitContext ctx)
          throws PolarisException

Specified by:

init in interface Plugin

Throws:

PolarisException

getName

public String getName()

Specified by:

getName in interface PluginConfigProvider

Specified by:

getName in interface Plugin

Overrides:

getName in class Destroyable

getPluginConfigClazz

public Class<? extends Verifier> getPluginConfigClazz()

Specified by:

getPluginConfigClazz in interface PluginConfigProvider

getConfig

public MetadataRouterConfig getConfig()

getAspect

public ServiceRouter.Aspect getAspect()

Specified by:

getAspect in interface ServiceRouter

enable

public boolean enable(RouteInfo routeInfo,
                      ServiceMetadata dstSvcInfo)

Specified by:

enable in interface ServiceRouter

Overrides:

enable in class AbstractServiceRouter