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Here are the steps to continuously monitor for messages using Vertx and Redis:

1. Create a Vertx instance:

Vertx vertx = Vertx.vertx();

1. Create a Redis client:

RedisClient redisClient = RedisClient.create(vertx);

1. Subscribe to a Redis channel:

RedisAPI redisAPI = RedisAPI.api(redisClient);
redisAPI.subscribe("mychannel", res -> {
  if (res.succeeded()) {
    System.out.println("Subscribed to channel successfully!");
  } else {
    System.out.println("Failed to subscribe to channel: " + res.cause());
  }
});

1. Add a handler to process incoming messages:

redisAPI.handler(message -> {
  System.out.println("Received message: " + message.toString());
});

1. Use the Vertx event loop to keep the application running:

vertx.eventLoop().executeBlocking(future -> {
  // Keep this thread running
}, res -> {
  if (res.succeeded()) {
    System.out.println("Application started.");
  } else {
    System.out.println("Failed to start application: " + res.cause());
  }
});

This code will continuously monitor the "mychannel" Redis channel for new messages and print them to the console.