The entry point into the Vert.x Core API.

You use an instance of this class for functionality including:

- Creating TCP clients and servers
- Creating HTTP clients and servers
- Creating DNS clients
- Creating Datagram sockets
- Setting and cancelling periodic and one-shot timers
- Getting a reference to the event bus API
- Getting a reference to the file system API
- Getting a reference to the shared data API
- Deploying and undeploying verticles

Most functionality in Vert.x core is fairly low level.

To create an instance of this class you can use the static factory methods: vertx, vertx and clusteredVertx.

Please see the user manual for more detailed usage information.

- `Anything`
  - `Object`
    - `Basic` ...and other supertypes
      - `Vertx` ...and other supertypes

- `Vertx`
  - `Basic`
    - `Identifiable`
    - `Object`
      - `Anything`
  - `Measured`

no subtypes hierarchy

Initializer
`Vertx(Vertx unknown)`

Inherited Attributes
Attributes inherited from: `Object` `hash`, `string`

Methods
`cancelTimer` | `shared default Boolean cancelTimer(Integer id)` Cancels the timer with the specified `id`. Parameters: `id` The id of the timer to cancel
`close` | `shared default void close()` Stop the the Vertx instance and release any resources held by it. The instance cannot be used after it has been closed. The actual close is asynchronous and may not complete until after the call has returned.
`close` | `shared default void close(Anything(Throwable?) completionHandler)` Like close but the completionHandler will be called when the close is complete Parameters: `completionHandler` The handler will be notified when the close is complete.
`createDatagramSocket` | `shared default DatagramSocket createDatagramSocket()` Create a datagram socket using default options
`createDatagramSocket` | `shared default DatagramSocket createDatagramSocket(DatagramSocketOptions options)` Create a datagram socket using the specified options Parameters: `options` the options to use
`createDnsClient` | `shared default DnsClient createDnsClient(Integer port, String host)` Create a DNS client to connect to a DNS server at the specified host and port Parameters: `port` the port `host` the host
`createHttpClient` | `shared default HttpClient createHttpClient()` Create a HTTP/HTTPS client using default options
`createHttpClient` | `shared default HttpClient createHttpClient(HttpClientOptions options)` Create a HTTP/HTTPS client using the specified options Parameters: `options` the options to use
`createHttpServer` | `shared default HttpServer createHttpServer()` Create an HTTP/HTTPS server using default options
`createHttpServer` | `shared default HttpServer createHttpServer(HttpServerOptions options)` Create an HTTP/HTTPS server using the specified options Parameters: `options` the options to use
`createNetClient` | `shared default NetClient createNetClient()` Create a TCP/SSL client using default options
`createNetClient` | `shared default NetClient createNetClient(NetClientOptions options)` Create a TCP/SSL client using the specified options Parameters: `options` the options to use
`createNetServer` | `shared default NetServer createNetServer()` Create a TCP/SSL server using default options
`createNetServer` | `shared default NetServer createNetServer(NetServerOptions options)` Create a TCP/SSL server using the specified options Parameters: `options` the options to use
`createSharedWorkerExecutor` | `shared default WorkerExecutor createSharedWorkerExecutor(String name)` Like createSharedWorkerExecutor but with the setWorkerPoolSize `poolSize`.
`createSharedWorkerExecutor` | `shared default WorkerExecutor createSharedWorkerExecutor(String name, Integer poolSize)` Like createSharedWorkerExecutor but with the setMaxWorkerExecuteTime `maxExecuteTime`.
`createSharedWorkerExecutor` | `shared default WorkerExecutor createSharedWorkerExecutor(String name, Integer poolSize, Integer maxExecuteTime)` Create a named worker executor, the executor should be closed when it's not needed anymore to release resources. This method can be called mutiple times with the same `name`. Executors with the same name will share the same worker pool. The worker pool size and max execute time are set when the worker pool is created and won't change after. The worker pool is released when all the WorkerExecutor sharing the same name are closed. Parameters: `name` the name of the worker executor `poolSize` the size of the pool `maxExecuteTime` the value of max worker execute time, in ns
`deployVerticle` | `shared default void deployVerticle(String name)` Deploy a verticle instance given a name. Given the name, Vert.x selects a instance to use to instantiate the verticle. For the rules on how factories are selected please consult the user manual. Parameters: `name` the name.
`deployVerticle` | `shared default void deployVerticle(String name, Anything(Throwable|String) completionHandler)` Like deployVerticle but the completionHandler will be notified when the deployment is complete. If the deployment is successful the result will contain a String representing the unique deployment ID of the deployment. This deployment ID can subsequently be used to undeploy the verticle. Parameters: `name` The identifier `completionHandler` a handler which will be notified when the deployment is complete
`deployVerticle` | `shared default void deployVerticle(String name, DeploymentOptions options)` Like deployVerticle but DeploymentOptions are provided to configure the deployment. Parameters: `name` the name `options` the deployment options.
`deployVerticle` | `shared default void deployVerticle(String name, DeploymentOptions options, Anything(Throwable|String) completionHandler)` Like deployVerticle but DeploymentOptions are provided to configure the deployment. Parameters: `name` the name `options` the deployment options. `completionHandler` a handler which will be notified when the deployment is complete
`deploymentIDs` | `shared default Set<String> deploymentIDs()` Return a Set of deployment IDs for the currently deployed deploymentIDs.
`eventBus` | `shared default EventBus eventBus()` Get the event bus object. There is a single instance of EventBus per Vertx instance.
`exceptionHandler` | `shared default Vertx exceptionHandler(Anything(Throwable)? handler)` Set a default exception handler for Context, set on at creation. Parameters: `handler` the exception handler
`executeBlocking` | `shared default void executeBlocking<T>(Anything(Future<T?>) blockingCodeHandler, Anything(Throwable|T?) resultHandler)` Like executeBlocking called with ordered = true.
`executeBlocking` | `shared default void executeBlocking<T>(Anything(Future<T?>) blockingCodeHandler, Boolean ordered, Anything(Throwable|T?) resultHandler)` Safely execute some blocking code. Executes the blocking code in the handler `blockingCodeHandler` using a thread from the worker pool. When the code is complete the handler `resultHandler` will be called with the result on the original context (e.g. on the original event loop of the caller). A `Future` instance is passed into `blockingCodeHandler`. When the blocking code successfully completes, the handler should call the complete or complete method, or the fail method if it failed. In the `blockingCodeHandler` the current context remains the original context and therefore any task scheduled in the `blockingCodeHandler` will be executed on the this context and not on the worker thread. Parameters: `blockingCodeHandler` handler representing the blocking code to run `ordered` if true then if executeBlocking is called several times on the same context, the executions for that context will be executed serially, not in parallel. if false then they will be no ordering guarantees `resultHandler` handler that will be called when the blocking code is complete
`fileSystem` | `shared default FileSystem fileSystem()` Get the filesystem object. There is a single instance of FileSystem per Vertx instance.
`getOrCreateContext` | `shared default Context getOrCreateContext()` Gets the current context, or creates one if there isn't one
`isClustered` | `shared default Boolean isClustered()` Is this Vert.x instance clustered?
`isMetricsEnabled` | `shared actual default Boolean isMetricsEnabled()` Whether the metrics are enabled for this measured object Refines `Measured.isMetricsEnabled`
`periodicStream` | `shared default TimeoutStream periodicStream(Integer delay)` Returns a periodic timer as a read stream. The timer will be fired every `delay` milliseconds after the has been called. Parameters: `delay` the delay in milliseconds, after which the timer will fire
`runOnContext` | `shared default void runOnContext(Anything() action)` Puts the handler on the event queue for the current context so it will be run asynchronously ASAP after all preceeding events have been handled. Parameters: `action` a handler representing the action to execute
`setPeriodic` | `shared default Integer setPeriodic(Integer delay, Anything(Integer) handler)` Set a periodic timer to fire every `delay` milliseconds, at which point `handler` will be called with the id of the timer. Parameters: `delay` the delay in milliseconds, after which the timer will fire `handler` the handler that will be called with the timer ID when the timer fires
`setTimer` | `shared default Integer setTimer(Integer delay, Anything(Integer) handler)` Set a one-shot timer to fire after `delay` milliseconds, at which point `handler` will be called with the id of the timer. Parameters: `delay` the delay in milliseconds, after which the timer will fire `handler` the handler that will be called with the timer ID when the timer fires
`sharedData` | `shared default SharedData sharedData()` Get the shared data object. There is a single instance of SharedData per Vertx instance.
`timerStream` | `shared default TimeoutStream timerStream(Integer delay)` Returns a one-shot timer as a read stream. The timer will be fired after `delay` milliseconds after the has been called. Parameters: `delay` the delay in milliseconds, after which the timer will fire
`undeploy` | `shared default void undeploy(String deploymentID)` Undeploy a verticle deployment. The actual undeployment happens asynchronously and may not complete until after the method has returned. Parameters: `deploymentID` the deployment ID
`undeploy` | `shared default void undeploy(String deploymentID, Anything(Throwable?) completionHandler)` Like #undeploy(String) but the completionHandler will be notified when the undeployment is complete. Parameters: `deploymentID` the deployment ID `completionHandler` a handler which will be notified when the undeployment is complete

Inherited Methods
Methods inherited from: `Object` `equals`
Methods inherited from: `Measured` `isMetricsEnabled()`