examples.MessageSourceExamples.java Source code

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Here is the source code for examples.MessageSourceExamples.java

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/*
 * Copyright (c) 2011-2016 The original author or authors
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Apache License v2.0 which accompanies this distribution.
 *
 *      The Eclipse Public License is available at
 *      http://www.eclipse.org/legal/epl-v10.html
 *
 *      The Apache License v2.0 is available at
 *      http://www.opensource.org/licenses/apache2.0.php
 *
 * You may elect to redistribute this code under either of these licenses.
 */

package examples;

import io.vertx.core.eventbus.MessageConsumer;
import io.vertx.core.json.JsonObject;
import io.vertx.servicediscovery.ServiceDiscovery;
import io.vertx.servicediscovery.Record;
import io.vertx.servicediscovery.ServiceReference;
import io.vertx.servicediscovery.types.MessageSource;

/**
 * @author <a href="http://escoffier.me">Clement Escoffier</a>
 */
public class MessageSourceExamples {

    public void example1(ServiceDiscovery discovery) {
        Record record = MessageSource.createRecord("some-message-source-service", // The service name
                "some-address" // The event bus address
        );

        discovery.publish(record, ar -> {
            // ...
        });

        record = MessageSource.createRecord("some-other-message-source-service", // The service name
                "some-address", // The event bus address
                "examples.MyData" // The payload type
        );
    }

    public void example2(ServiceDiscovery discovery) {
        // Get the record
        discovery.getRecord(new JsonObject().put("name", "some-message-source-service"), ar -> {
            if (ar.succeeded() && ar.result() != null) {
                // Retrieve the service reference
                ServiceReference reference = discovery.getReference(ar.result());
                // Retrieve the service object
                MessageConsumer<JsonObject> consumer = reference.get();

                // Attach a message handler on it
                consumer.handler(message -> {
                    // message handler
                    JsonObject payload = message.body();
                });

                // ...
                // when done
                reference.release();
            }
        });
    }

    public void example3(ServiceDiscovery discovery) {
        MessageSource.<JsonObject>getConsumer(discovery,
                new JsonObject().put("name", "some-message-source-service"), ar -> {
                    if (ar.succeeded()) {
                        MessageConsumer<JsonObject> consumer = ar.result();

                        // Attach a message handler on it
                        consumer.handler(message -> {
                            // message handler
                            JsonObject payload = message.body();
                        });
                        // ...

                        // Dont' forget to release the service
                        ServiceDiscovery.releaseServiceObject(discovery, consumer);

                    }
                });
    }

}