io.dapr.Topic Maven / Gradle / Ivy
/*
* Copyright 2021 The Dapr Authors
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
limitations under the License.
*/
package io.dapr;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Documented
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Topic {
/**
* Name of topic to be subscribed to.
* @return Topic's name.
*/
String name();
/**
* Name of the pubsub bus to be subscribed to.
* @return pubsub bus's name.
*/
String pubsubName();
/**
* The rules used to match the incoming cloud event.
* @return the CEL expression.
*/
Rule rule() default @Rule(match = "", priority = 0);
/**
* Metadata in the form of a json object.
* {
* "mykey": "myvalue"
* }
* @return metadata object
*/
String metadata() default "{}";
/**
* Name of dead letter topic to forward undeliverable messages.
* @return dead letter topic's name.
*/
String deadLetterTopic() default "";
}