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

Class ConditionStateRouter<T>

java.lang.Object

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

org.apache.dubbo.rpc.cluster.router.condition.ConditionStateRouter<T>

All Implemented Interfaces:

StateRouter<T>

public class ConditionStateRouter<T>
extends AbstractStateRouter<T>

Condition Router directs traffics matching the 'when condition' to a particular address subset determined by the 'then condition'. One typical condition rule is like below, with 1. the 'when condition' on the left side of '=>' contains matching rule like 'method=sayHello' and 'method=sayHi' 2. the 'then condition' on the right side of '=>' contains matching rule like 'region=hangzhou' and 'address=*:20881'

By default, condition router support matching rules like 'foo=bar', 'foo=bar*', 'arguments[0]=bar', 'attachments[foo]=bar', 'attachments[foo]=1~100', etc. It's also very easy to add customized matching rules by extending ConditionMatcherFactory and ValuePattern

--- scope: service force: true runtime: true enabled: true key: org.apache.dubbo.samples.governance.api.DemoService conditions: - method=sayHello => region=hangzhou - method=sayHi => address=*:20881 ...

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME

Constructor Summary

Constructors

Constructor and Description
ConditionStateRouter(org.apache.dubbo.common.URL url)
ConditionStateRouter(org.apache.dubbo.common.URL url, String rule, boolean force, boolean enabled)

Method Summary

Modifier and Type	Method and Description
void	init(String rule)
boolean	isRuntime() To decide whether this router need to execute every time an RPC comes or should only execute when addresses or rule change.

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

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.dubbo.rpc.cluster.router.state.StateRouter

stop

Field Detail

NAME

public static final String NAME

See Also:

Constant Field Values

Constructor Detail

ConditionStateRouter

public ConditionStateRouter(org.apache.dubbo.common.URL url,
                            String rule,
                            boolean force,
                            boolean enabled)

ConditionStateRouter

public ConditionStateRouter(org.apache.dubbo.common.URL url)

Method Detail

init

public void init(String rule)

isRuntime

public boolean isRuntime()

Description copied from interface: StateRouter

To decide whether this router need to execute every time an RPC comes or should only execute when addresses or rule change.

Specified by:

isRuntime in interface StateRouter<T>

Overrides:

isRuntime in class AbstractStateRouter<T>

Returns:

true if the router need to execute every time.