Created
August 22, 2017 14:42
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Example of Vert.x Verticle using method references.
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| package org.rantue.server; | |
| import io.netty.handler.codec.http.HttpResponseStatus; | |
| import io.vertx.core.AbstractVerticle; | |
| import io.vertx.core.AsyncResult; | |
| import io.vertx.core.Future; | |
| import io.vertx.core.Handler; | |
| import io.vertx.core.buffer.Buffer; | |
| import io.vertx.core.eventbus.Message; | |
| import io.vertx.core.json.JsonObject; | |
| import io.vertx.ext.web.Router; | |
| import io.vertx.ext.web.RoutingContext; | |
| import java.util.function.BiConsumer; | |
| import java.util.function.Consumer; | |
| import static io.netty.handler.codec.http.HttpResponseStatus.INTERNAL_SERVER_ERROR; | |
| import static io.netty.handler.codec.http.HttpResponseStatus.NOT_FOUND; | |
| import static io.netty.handler.codec.http.HttpResponseStatus.OK; | |
| public class CallbackVerticle extends AbstractVerticle { | |
| @Override | |
| public void start(Future startFuture) { | |
| Router router = Router.router(vertx); | |
| router.get("/customer").handler(this::handleRequest); | |
| vertx.createHttpServer().requestHandler(router::accept).listen(8080, startFuture.completer()); | |
| } | |
| private void handleRequest(final RoutingContext ctx) { | |
| Handler<AsyncResult<Message<Object>>> handler = reply -> this.handleMessageReply(ctx, reply); | |
| vertx.eventBus().send("some.address", new JsonObject(), handler); | |
| } | |
| private void handleMessageReply(final RoutingContext ctx, final AsyncResult<Message<Object>> reply) { | |
| if (reply.succeeded()) { | |
| JsonObject body = (JsonObject) reply.result(); | |
| Handler<AsyncResult<Buffer>> handler = fileRes -> this.handleFileRead(ctx, fileRes); | |
| vertx.fileSystem().readFile(body.getString("fileName"), handler); | |
| } else { | |
| ctx.response() | |
| .setStatusMessage(INTERNAL_SERVER_ERROR.reasonPhrase()) | |
| .setStatusCode(INTERNAL_SERVER_ERROR.code()) | |
| .end(); | |
| } | |
| } | |
| private void handleFileRead(final RoutingContext ctx, final AsyncResult<Buffer> fileRes) { | |
| if (fileRes.succeeded()) { | |
| ctx.response() | |
| .setStatusCode(OK.code()) | |
| .setStatusMessage(OK.reasonPhrase()) | |
| .end(fileRes.result()); | |
| } else { | |
| ctx.response() | |
| .setStatusMessage(NOT_FOUND.reasonPhrase()) | |
| .setStatusCode(NOT_FOUND.code()) | |
| .end(); | |
| } | |
| } | |
| } |
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