org.apache.dubbo.rpc.cluster.router.condition.config

Class ListenableStateRouter<T>

java.lang.Object

org.apache.dubbo.rpc.cluster.router.state.AbstractStateRouter<T>

org.apache.dubbo.rpc.cluster.router.condition.config.ListenableStateRouter<T>

All Implemented Interfaces:

EventListener, org.apache.dubbo.common.config.configcenter.ConfigurationListener, StateRouter<T>

Direct Known Subclasses:

AppStateRouter, ServiceStateRouter

public abstract class ListenableStateRouter<T>
extends AbstractStateRouter<T>
implements org.apache.dubbo.common.config.configcenter.ConfigurationListener

Abstract router which listens to dynamic configuration

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME

Constructor Summary

Constructors

Constructor and Description
ListenableStateRouter(org.apache.dubbo.common.URL url, String ruleKey)

Method Summary

Modifier and Type	Method and Description
BitList<Invoker<T>>	doRoute(BitList<Invoker<T>> invokers, org.apache.dubbo.common.URL url, Invocation invocation, boolean needToPrintMessage, org.apache.dubbo.common.utils.Holder<RouterSnapshotNode<T>> nodeHolder, org.apache.dubbo.common.utils.Holder<String> messageHolder) Filter invokers with current routing rule and only return the invokers that comply with the rule.
boolean	isForce() To decide whether this router should take effect when none of the invoker can match the router rule, which means the StateRouter.route(BitList, URL, Invocation, boolean, Holder) would be empty.
void	process(org.apache.dubbo.common.config.configcenter.ConfigChangedEvent event)
void	stop()

Methods inherited from class org.apache.dubbo.rpc.cluster.router.state.AbstractStateRouter

buildSnapshot, getNextRouter, getRuleRepository, getUrl, isRuntime, notify, route, setForce, setNextRouter, setUrl

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final String NAME

See Also:

Constant Field Values

Constructor Detail

ListenableStateRouter

public ListenableStateRouter(org.apache.dubbo.common.URL url,
                             String ruleKey)

Method Detail

process

public void process(org.apache.dubbo.common.config.configcenter.ConfigChangedEvent event)

Specified by:

process in interface org.apache.dubbo.common.config.configcenter.ConfigurationListener

doRoute

public BitList<Invoker<T>> doRoute(BitList<Invoker<T>> invokers,
                                   org.apache.dubbo.common.URL url,
                                   Invocation invocation,
                                   boolean needToPrintMessage,
                                   org.apache.dubbo.common.utils.Holder<RouterSnapshotNode<T>> nodeHolder,
                                   org.apache.dubbo.common.utils.Holder<String> messageHolder)
                            throws RpcException

Description copied from class: AbstractStateRouter

Filter invokers with current routing rule and only return the invokers that comply with the rule.

Parameters:

invokers - all invokers to be routed

url - consumerUrl

invocation - invocation

needToPrintMessage - should current router print message

nodeHolder - RouterSnapshotNode In general, router itself no need to care this param, just pass to continueRoute

messageHolder - message holder when router should current router print message

Returns:

routed result

Throws:

RpcException

isForce

public boolean isForce()

Description copied from interface: StateRouter

To decide whether this router should take effect when none of the invoker can match the router rule, which means the StateRouter.route(BitList, URL, Invocation, boolean, Holder) would be empty. Most of time, most router implementation would default this value to false.

Specified by:

isForce in interface StateRouter<T>

Overrides:

isForce in class AbstractStateRouter<T>

Returns:

true to execute if none of invokers matches the current router

stop

public void stop()

Specified by:

stop in interface StateRouter<T>