def __init__(self, server_adapter=cherrypy.server):
        """Initialize CPWSGIServer instance.

        Args:
            server_adapter (cherrypy._cpserver.Server): ...
        """
        self.server_adapter = server_adapter
        self.max_request_header_size = (
            self.server_adapter.max_request_header_size or 0
        )
        self.max_request_body_size = (
            self.server_adapter.max_request_body_size or 0
        )

        server_name = (
            self.server_adapter.socket_host
            or self.server_adapter.socket_file
            or None
        )

        self.wsgi_version = self.server_adapter.wsgi_version

        super(CPWSGIServer, self).__init__(
            server_adapter.bind_addr,
            cherrypy.tree,
            self.server_adapter.thread_pool,
            server_name,
            max=self.server_adapter.thread_pool_max,
            request_queue_size=self.server_adapter.socket_queue_size,
            timeout=self.server_adapter.socket_timeout,
            shutdown_timeout=self.server_adapter.shutdown_timeout,
            accepted_queue_size=self.server_adapter.accepted_queue_size,
            accepted_queue_timeout=self.server_adapter.accepted_queue_timeout,
            peercreds_enabled=self.server_adapter.peercreds,
            peercreds_resolve_enabled=self.server_adapter.peercreds_resolve,
        )
        self.ConnectionClass.RequestHandlerClass = CPWSGIHTTPRequest

        self.protocol = self.server_adapter.protocol_version
        self.nodelay = self.server_adapter.nodelay

        if sys.version_info >= (3, 0):
            ssl_module = self.server_adapter.ssl_module or 'builtin'
        else:
            ssl_module = self.server_adapter.ssl_module or 'pyopenssl'
        if self.server_adapter.ssl_context:
            adapter_class = cheroot.server.get_ssl_adapter_class(ssl_module)
            self.ssl_adapter = adapter_class(
                self.server_adapter.ssl_certificate,
                self.server_adapter.ssl_private_key,
                self.server_adapter.ssl_certificate_chain,
                self.server_adapter.ssl_ciphers,
            )
            self.ssl_adapter.context = self.server_adapter.ssl_context
        elif self.server_adapter.ssl_certificate:
            adapter_class = cheroot.server.get_ssl_adapter_class(ssl_module)
            self.ssl_adapter = adapter_class(
                self.server_adapter.ssl_certificate,
                self.server_adapter.ssl_private_key,
                self.server_adapter.ssl_certificate_chain,
                self.server_adapter.ssl_ciphers,
            )

        self.stats['Enabled'] = getattr(
            self.server_adapter,
            'statistics',
            False,
        )
Initialize CPWSGIServer instance.

        Args:
            server_adapter (cherrypy._cpserver.Server): ...
        
cherrypy/_cpwsgi_server.py