vertx-gaia/vertx-co/src/main/environment/io/vertx/up/annotations/SessionData.java
package io.vertx.up.annotations;
import java.lang.annotation.*;
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface SessionData {
String value();
/**
* If the return type is JsonObject, you can extract one field to store into session
*
* @return stored key in session
*/
String field() default "";
}