# Class HttpServerProvider

java.lang.Object
com.sun.net.httpserver.spi.HttpServerProvider

public abstract class HttpServerProvider extends Object
Service provider class for HttpServer. Sub-classes of HttpServerProvider provide an implementation of `HttpServer` and associated classes. Applications do not normally use this class. See `provider()` for how providers are found and loaded.

Since:
  1.6

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  `protected`
  `HttpServerProvider()`
  Initializes a new instance of this class.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `abstract HttpServer`
  `createHttpServer(InetSocketAddress addr, int backlog)`
  creates a HttpServer from this provider
  `abstract HttpsServer`
  `createHttpsServer(InetSocketAddress addr, int backlog)`
  creates a HttpsServer from this provider
  `static HttpServerProvider`
  `provider()`
  Returns the system wide default HttpServerProvider for this invocation of the Java virtual machine.

  ### Methods declared in class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### HttpServerProvider

    protected HttpServerProvider()
    Initializes a new instance of this class.

- ## Method Details

  - ### createHttpServer

    public abstract HttpServer createHttpServer(InetSocketAddress addr, int backlog) throws IOException
    creates a HttpServer from this provider
    Parameters:
      `addr` - the address to bind to. May be `null`
      `backlog` - the socket backlog. A value of `zero` means the systems default
    Returns:
      An instance of HttpServer
    Throws:
      `IOException` - if an I/O error occurs

  - ### createHttpsServer

    public abstract HttpsServer createHttpsServer(InetSocketAddress addr, int backlog) throws IOException
    creates a HttpsServer from this provider
    Parameters:
      `addr` - the address to bind to. May be `null`
      `backlog` - the socket backlog. A value of `zero` means the systems default
    Returns:
      An instance of HttpServer
    Throws:
      `IOException` - if an I/O error occurs

  - ### provider

    public static HttpServerProvider provider()
    Returns the system wide default HttpServerProvider for this invocation of the Java virtual machine.

    The first invocation of this method locates the default provider object as follows:

    1. If the system property `com.sun.net.httpserver.HttpServerProvider` is defined then it is taken to be the fully-qualified name of a concrete provider class. The class is loaded and instantiated; if this process fails then an unspecified unchecked error or exception is thrown.

    2. If a provider class has been installed in a jar file that is visible to the system class loader, and that jar file contains a provider-configuration file named `com.sun.net.httpserver.HttpServerProvider` in the resource directory `META-INF/services`, then the first class name specified in that file is taken. The class is loaded and instantiated; if this process fails then an unspecified unchecked error or exception is thrown.

    3. Finally, if no provider has been specified by any of the above means then the system-default provider class is instantiated and the result is returned.

    Subsequent invocations of this method return the provider that was returned by the first invocation.

    Returns:
      The system-wide default HttpServerProvider