Passing custom class object when deploying verticles

Question

I have a custom client object that I am instantiating in the main() method and need to pass it to all the verticle instances that I am going to deploy. Here is what I have tried -

1.)

private static Connection connection;
.
.
.
//method to initialise client
initialiseClient();
final DeploymentOptions deployOpts = new DeploymentOptions().setInstances(num_instances);
vertx.deployVerticle(new MyVerticle(connection), deployOpts, ar -> {
                  if (ar.succeeded()) {
                      startFuture.complete();
                  } else {
                      startFuture.fail(ar.cause());
                  }
              });

In this case I am getting the following error because the verticle instance has already been created.

Can't specify > 1 instances for already created verticle

2.)

JsonObject object = new JsonObject().put("connection-object", connection); 
final DeploymentOptions deployOpts = new DeploymentOptions().setInstances(num_instances);
vertx.deployVerticle(MyVerticle.class.getName(), deployOpts, ar -> {
                  if (ar.succeeded()) {
                      startFuture.complete();
                  } else {
                      startFuture.fail(ar.cause());
                  }
              });

In this case I get the error

java.lang.IllegalStateException: Illegal type in JsonObject: class com.abc.def.Connection

So my question is, is there any way to pass a custom class object while deploying multiple instances of a verticle?

Answer 1

You can use the deployVerticle method that takes a Supplier<Verticle> (javadocs here).

DeploymentOptions deployOpts = new DeploymentOptions().setInstances(num_instances);
vertx.deployVerticle(() -> { return new MyVerticle(connection) }, deployOpts);