com.netflix.eureka2.client.transport.registration.http.HttpRegistrationClient Maven / Gradle / Ivy

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/*
 * Copyright 2014 Netflix, Inc.
 *
 * 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.netflix.eureka2.client.transport.registration.http;

import com.netflix.eureka2.client.transport.http.HttpErrorHandler;
import com.netflix.eureka2.client.transport.registration.RegistrationClient;
import com.netflix.eureka2.registry.InstanceInfo;
import com.netflix.eureka2.utils.Json;
import io.netty.buffer.ByteBuf;
import io.reactivex.netty.protocol.http.client.HttpClient;
import io.reactivex.netty.protocol.http.client.HttpClientRequest;
import io.reactivex.netty.protocol.http.client.HttpClientResponse;
import rx.Observable;
import rx.Observable.Operator;
import rx.subjects.ReplaySubject;

/**
 * @author Tomasz Bak
 */
public class HttpRegistrationClient implements RegistrationClient {

    private static final Operator, HttpClientResponse> errorHandler = new HttpErrorHandler();

    private final String baseURI;
    private final HttpClient httpClient;

    private final ReplaySubject statusSubject = ReplaySubject.create();

    public HttpRegistrationClient(String baseURI, HttpClient httpClient) {
        this.baseURI = baseURI;
        this.httpClient = httpClient;
    }

    @Override
    public Observable register(InstanceInfo instanceInfo) {
        return httpClient.submit(HttpClientRequest.createPost(baseURI + "/apps")
                .withContent(Json.toByteBufJson(instanceInfo))
                .withHeader("ContentType", "application/json"))
                .lift(errorHandler)
                .ignoreElements().cast(Void.class);
    }

    @Override
    public Observable update(InstanceInfo instanceInfo) {
        return httpClient.submit(HttpClientRequest.createPut(baseURI + "/apps/" + instanceInfo.getId())
                .withContent(Json.toByteBufJson(instanceInfo))
                .withHeader("ContentType", "application/json"))
                .lift(errorHandler)
                .ignoreElements().cast(Void.class);
    }

    @Override
    public Observable unregister(InstanceInfo instanceInfo) {
        return httpClient.submit(HttpClientRequest.createDelete(baseURI + "/apps/" + instanceInfo.getId()))
                .lift(errorHandler)
                .ignoreElements().cast(Void.class);
    }

    @Override
    public Observable heartbeat(InstanceInfo instanceInfo) {
        return httpClient.submit(HttpClientRequest.createGet(baseURI + "/apps/" + instanceInfo.getId()))
                .lift(errorHandler)
                .ignoreElements().cast(Void.class);
    }

    @Override
    public void shutdown() {
        try {
            httpClient.shutdown();
        } finally {
            statusSubject.onCompleted();
        }
    }

    @Override
    public Observable lifecycleObservable() {
        return statusSubject.asObservable();
    }
}