/*
* Copyright 2016 the original author or 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 com.greglturnquist.learningspringboot.comments;
import io.micrometer.core.instrument.MeterRegistry;
import reactor.core.publisher.Flux;
import org.springframework.boot.CommandLineRunner;
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.annotation.Input;
import org.springframework.cloud.stream.annotation.Output;
import org.springframework.cloud.stream.annotation.StreamListener;
import org.springframework.cloud.stream.messaging.Processor;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
/**
* @author Greg Turnquist
*/
// tag::stream-1[]
@Service
@EnableBinding(Processor.class)
public class CommentService {
// end::stream-1[]
private final CommentRepository repository;
private final MeterRegistry meterRegistry;
public CommentService(CommentRepository repository,
MeterRegistry meterRegistry) {
this.repository = repository;
this.meterRegistry = meterRegistry;
}
// tag::stream-2[]
@StreamListener
@Output(Processor.OUTPUT)
public Flux<Comment> save(@Input(Processor.INPUT) Flux<Comment> newComment) {
return repository
.saveAll(newComment)
.map(comment -> {
meterRegistry
.counter("comments.consumed", "imageId", comment.getImageId())
.increment();
return comment;
});
}
// end::stream-2[]
@Bean
CommandLineRunner setUp(CommentRepository repository) {
return args -> {
repository.deleteAll().subscribe();
};
}
}
