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Asynchronous HTTP/2 RPC/REST client/server library built on top of Java 8, Netty, Thrift and gRPC (armeria-spring-boot2-webflux-autoconfigure)

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/*
 * Copyright 2021 LINE Corporation
 *
 * LINE Corporation licenses this file to you 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:
 *
 *   https://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.linecorp.armeria.spring;

import com.codahale.metrics.MetricRegistry;
import com.fasterxml.jackson.databind.ObjectMapper;

import com.linecorp.armeria.common.HttpRequest;
import com.linecorp.armeria.common.HttpResponse;
import com.linecorp.armeria.common.HttpStatus;
import com.linecorp.armeria.common.MediaType;
import com.linecorp.armeria.server.HttpService;
import com.linecorp.armeria.server.ServiceRequestContext;

final class DropwizardExpositionService implements HttpService {

    private final MetricRegistry meterRegistry;
    private final ObjectMapper mapper;

    DropwizardExpositionService(MetricRegistry meterRegistry, ObjectMapper mapper) {
        this.meterRegistry = meterRegistry;
        this.mapper = mapper;
    }

    @Override
    public HttpResponse serve(ServiceRequestContext ctx, HttpRequest req) throws Exception {
        return HttpResponse.of(HttpStatus.OK, MediaType.JSON_UTF_8,
                               mapper.writeValueAsBytes(meterRegistry));
    }
}