# Uses of Package
io.vertx.core.spi

- Packages that use io.vertx.core.spi
  Package | Description
  --- | ---
  io.vertx.core |
  io.vertx.core.buffer |
  io.vertx.core.http |
  io.vertx.core.streams |

- Classes in io.vertx.core.spi used by io.vertx.core
  Class and Description
  FutureFactory
  VerticleFactory Has responsibility for creating verticle instances.
  VertxFactory Factory for creating Vertx instances.

- Classes in io.vertx.core.spi used by io.vertx.core.buffer
  Class and Description
  BufferFactory

- Classes in io.vertx.core.spi used by io.vertx.core.http
  Class and Description
  WebSocketFrameFactory

- Classes in io.vertx.core.spi used by io.vertx.core.streams
  Class and Description
  PumpFactory

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