Introduction to Programming

The HTTP client as a microservice

We can use periodic service verticals to send messages to the server vertical using the HTTP protocol. In order to do it, we need a new dependency, so we can use the WebClient class:

<dependency>    <groupId>io.vertx</groupId>    <artifactId>vertx-web-client</artifactId>    <version>${vertx.version}</version></dependency>

With that, the periodic service that sends messages to the HTTP server vertical looks like this:

package com.packt.javapath.ch18demo.microservices;import io.vertx.rxjava.core.AbstractVerticle;import io.vertx.rxjava.core.buffer.Buffer;import io.vertx.rxjava.ext.web.client.HttpResponse;import io.vertx.rxjava.ext.web.client.WebClient;import rx.Single;import java.time.LocalTime;import java.time.temporal.ChronoUnit ...