public interface GreetingService {
String greet();
}
@AutoService(GreetingService.class)
public class EnglishGreetingService implements GreetingService {
@Override
public String greet() {
return "Hello!";
}
}
@AutoService(GreetingService.class)
public class ChineseGreetingService implements GreetingService {
@Override
public String greet() {
}
}
<dependencies>
<dependency>
<groupId>com.google.auto.service</groupId>
<artifactId>auto-service</artifactId>
<version>1.0-rc7</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<annotationProcessorPaths>
<path>
<groupId>com.google.auto.service</groupId>
<artifactId>auto-service</artifactId>
<version>1.0-rc7</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
</plugins>
</build>
ServiceLoader<GreetingService> loader = ServiceLoader.load(GreetingService.class);
for (GreetingService service : loader) {
System.out.println(service.greet());
}
