# Package io.vertx.core.spi.metrics

- Interface Summary
  Interface | Description
  --- | ---
  ClientMetrics<M,T,Req,Resp> | The client metrics SPI that Vert.x will use to call when client events occur.
  DatagramSocketMetrics | The datagram/udp metrics SPI which Vert.x will use to call when each event occurs pertaining to datagram sockets. The thread model for the datagram socket depends on the actual context thats started the server.
  EventBusMetrics<H> | The event bus metrics SPI which Vert.x will use to call when each event occurs.
  HttpClientMetrics<R,W,S,T> | The http client metrics SPI that Vert.x will use to call when http client events occur. The thread model for the http server metrics depends on the actual context thats started the server.
  HttpServerMetrics<R,W,S> | The http server metrics SPI that Vert.x will use to call when each http server event occurs. The thread model for the http server metrics depends on the actual context thats started the server.
  Metrics | The metrics interface is implemented by metrics providers that wants to provide monitoring of Vert.x core.
  MetricsProvider | Metrics provider is the base SPI used by metrics implementations to retrieve a `Metrics` object. It is meant to be implemented by `Measured` implementations but not exposed directly.
  NetworkMetrics<S> | An SPI used internally by Vert.x to gather metrics on a net socket which serves as a base class for TCP or UDP.
  PoolMetrics<T> | An SPI used internally by Vert.x to gather metrics on pools used by Vert.x (execute blocking, worker verticle or data source).
  TCPMetrics<S> | An SPI used internally by Vert.x to gather metrics on a net socket which serves as a base class for things like HttpServer and HttpClient, all of which serve TCP connections. The thread model for the tcp metrics depends on the actual context thats created the client/server.
  VertxMetrics | The main Vert.x metrics SPI which Vert.x will use internally.

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