Explicit Target

Specify explicit target in dubbo

In the development and testing environment, it is often necessary to bypass the registry and test only designated service providers. In this case, point-to-point direct connection may be required, and the service provider will ignore the list of provider registration providers. The interface A configure Point-to-point, does not affect the B interface to obtain a list from the registry.

/user-guide/images/dubbo-directly.jpg

Configure with XML

If it is online demand needs the point-to-point feature,You can configure the specified provider url at <dubbo:reference>.it will bypass the registry, multiple addresses separated by semicolons, the following configuration:

<dubbo:reference id="xxxService" interface="com.alibaba.xxx.XxxService" url="dubbo://localhost:20890" />

Configure with the -D argument

Add the -D parameter mapping service address to the JVM startup parameters:

java -Dcom.alibaba.xxx.XxxService=dubbo://localhost:20890

Configure with the .properties file

If you have more services, you can also use file mapping to specify the mapping file path with -Ddubbo.resolve.file. This configuration takes precedence over the configuration in<dubbo: reference>, for example:

java -Ddubbo.resolve.file=xxx.properties

Then add the configuration in the mapping file xxx.properties, where key is the service name and value is the service provider URL:

com.alibaba.xxx.XxxService=dubbo://localhost:20890

Last modified November 25, 2020: fix sample code issue for SPI.md (#659) (0576d68)