Module io.helidon.webserver

Package io.helidon.webserver

Class WebServer.Builder

java.lang.Object

io.helidon.webserver.WebServer.Builder

All Implemented Interfaces:

Builder<WebServer>, MediaContextBuilder<WebServer.Builder>, ParentingMediaContextBuilder<WebServer.Builder>, SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>, Supplier<WebServer>

Enclosing interface:

WebServer

public static final class WebServer.Builder
extends Object
implements Builder<WebServer>, SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>, ParentingMediaContextBuilder<WebServer.Builder>, MediaContextBuilder<WebServer.Builder>

WebServer builder class provides a convenient way to set up WebServer with multiple server sockets and optional multiple routings.

Field Summary

Fields inherited from interface io.helidon.webserver.SocketConfiguration.SocketConfigurationBuilder

REQUESTED_URI_DISCOVERY_CONFIG_KEY_PREFIX

Method Summary

Modifier and Type	Method	Description
WebServer.Builder	addMediaSupport(MediaSupport mediaSupport)	Adds new instance of MediaSupport.
WebServer.Builder	addNamedRouting(String name, Routing routing)	Associates a dedicated routing with an additional server socket configuration.
WebServer.Builder	addNamedRouting(String name, Supplier<Routing> routingBuilder)	Associates a dedicated routing with an additional server socket configuration.
WebServer.Builder	addReader(MessageBodyReader<?> reader)	Registers new reader.
WebServer.Builder	addRequestedUriDiscoveryType(SocketConfiguration.RequestedUriDiscoveryType type)	Adds a type of front-end URI discovery Helidon should use for this socket.
WebServer.Builder	addSocket(SocketConfiguration config)	Adds an additional named server socket configuration.
WebServer.Builder	addSocket(SocketConfiguration socketConfiguration, Routing routing)	Add a named socket and routing.
WebServer.Builder	addSocket(String name, SocketConfiguration socketConfiguration)	Deprecated. since 2.0.0, please use addSocket(SocketConfiguration) instead, name is now part of socket configuration
WebServer.Builder	addSocket(String name, Supplier<SocketConfiguration> socketConfigurationBuilder)	Deprecated. since 2.0.0, please use addSocket(Supplier) instead, name is now part of socket configuration
WebServer.Builder	addSocket(Supplier<SocketConfiguration> socketConfigurationBuilder)	Adds an additional named server socket configuration builder.
WebServer.Builder	addStreamReader(MessageBodyStreamReader<?> streamReader)	Registers new stream reader.
WebServer.Builder	addStreamWriter(MessageBodyStreamWriter<?> streamWriter)	Registers new stream writer.
WebServer.Builder	addWriter(MessageBodyWriter<?> writer)	Registers new writer.
WebServer.Builder	backlog(int backlog)	Configures a maximum length of the queue of incoming connections on the server socket.
WebServer.Builder	backpressureBufferSize(long backpressureBufferSize)	Maximum length of the response data sending buffer can keep without flushing.
WebServer.Builder	backpressureStrategy(BackpressureStrategy backpressureStrategy)	Sets a backpressure strategy for the server to apply against user provided response upstream.
WebServer.Builder	bindAddress(InetAddress bindAddress)	Configures local address where the server listens on with the server socket.
WebServer	build()	Builds the WebServer instance as configured by this builder and its parameters.
WebServer.Builder	config(Config config)	Update this server configuration from the config provided.
WebServer.Builder	config(ServerConfiguration configuration)	Deprecated. since 2.0.0 - please use methods on this builder, or config(io.helidon.config.Config) instead
WebServer.Builder	config(Supplier<ServerConfiguration> configurationBuilder)	Deprecated. since 2.0.0 - see config(ServerConfiguration)
WebServer.Builder	context(Context context)	Configure the application scoped context to be used as a parent for webserver request contexts.
WebServer.Builder	continueImmediately(boolean continueImmediately)	When true WebServer answers to expect continue with 100 continue immediately, not waiting for user to actually request the data.
WebServer.Builder	defaultSocket(Consumer<SocketConfiguration.Builder> socket)	Configure listener for the default socket.
WebServer.Builder	directHandler(DirectHandler handler, DirectHandler.EventType... types)	Provide a custom handler for events that bypass routing.
WebServer.Builder	enableCompression(boolean value)	Enable negotiation for gzip/deflate content encodings.
WebServer.Builder	experimental(ExperimentalConfiguration experimental)	Configure experimental features.
boolean	hasSocket(String socketName)	A method to validate a named socket configuration exists in this builder.
WebServer.Builder	maxHeaderSize(int size)	Maximal number of bytes of all header values combined.
WebServer.Builder	maxInitialLineLength(int length)	Maximal number of characters in the initial HTTP line.
WebServer.Builder	maxPayloadSize(long size)	Set a maximum payload size for a client request.
WebServer.Builder	mediaContext(MediaContext mediaContext)	Sets the MediaContext parent and overrides the existing one.
WebServer.Builder	port(int port)	Configures a server port to listen on with the server socket.
WebServer.Builder	printFeatureDetails(boolean shouldPrint)	Set to true to print detailed feature information on startup.
WebServer.Builder	receiveBufferSize(int receiveBufferSize)	Configures proposed value of the TCP receive window that is advertised to the remote peer on the server socket.
WebServer.Builder	requestedUriDiscoveryEnabled(boolean enabled)	Sets whether requested URI discovery is enabled for the socket.
WebServer.Builder	requestedUriDiscoveryTypes(List<SocketConfiguration.RequestedUriDiscoveryType> types)	Assigns the front-end URI discovery type(s) this socket should use.
WebServer.Builder	routing(Routing defaultRouting)	Configure the default routing of this WebServer.
WebServer.Builder	routing(Supplier<Routing> defaultRouting)	Configure the default routing of this WebServer.
WebServer.Builder	timeout(long amount, TimeUnit unit)	Configures a server socket timeout.
WebServer.Builder	tls(WebServerTls webServerTls)	Configures SSL for this socket.
WebServer.Builder	tracer(Tracer tracer)	Sets an opentracing.io tracer.
WebServer.Builder	tracer(Supplier<? extends Tracer> tracerBuilder)	Sets an opentracing.io tracer.
WebServer.Builder	transport(Transport transport)	Configure the transport to be used by this server.
WebServer.Builder	trustedProxies(AllowList trustedProxies)	Assigns the settings governing the acceptance and rejection of forwarded headers from incoming requests to this socket.
WebServer.Builder	update(Consumer<WebServer.Builder> updateFunction)	A helper method to support fluentAPI when invoking another method.
WebServer.Builder	workersCount(int workers)	Sets a count of threads in pool used to process HTTP requests.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.helidon.common.Builder

get

Methods inherited from interface io.helidon.media.common.MediaContextBuilder

addMediaSupport, addReader, addStreamReader, addStreamWriter, addWriter

Methods inherited from interface io.helidon.media.common.ParentingMediaContextBuilder

mediaContext

Methods inherited from interface io.helidon.webserver.SocketConfiguration.SocketConfigurationBuilder

bindAddress, host, tls

Method Detail

build

public WebServer build()

Builds the WebServer instance as configured by this builder and its parameters.

Specified by:

build in interface Builder<WebServer>

Returns:

a ready to use WebServer

Throws:

IllegalStateException - if there are unpaired named routings (as described at addNamedRouting(String, Routing))

defaultSocket

public WebServer.Builder defaultSocket(Consumer<SocketConfiguration.Builder> socket)

Configure listener for the default socket.

Parameters:

socket - socket configuration builder consumer

Returns:

updated builder

transport

public WebServer.Builder transport(Transport transport)

Configure the transport to be used by this server.

Parameters:

transport - transport to use

Returns:

updated builder instance

routing

public WebServer.Builder routing(Routing defaultRouting)

Configure the default routing of this WebServer. Default routing is the one available on the default listen host and port of the WebServer

Parameters:

defaultRouting - new default routing; if already configured, this instance would replace the existing instance

Returns:

updated builder instance

routing

public WebServer.Builder routing(Supplier<Routing> defaultRouting)

Configure the default routing of this WebServer. Default routing is the one available on the default listen host and port of the WebServer

Parameters:

defaultRouting - new default routing; if already configured, this instance would replace the existing instance

Returns:

updated builder instance

config

@Deprecated
public WebServer.Builder config(ServerConfiguration configuration)

Deprecated.

since 2.0.0 - please use methods on this builder, or config(io.helidon.config.Config) instead

Set a configuration of the WebServer. Once this method is called, all other methods on this interface related to server configuration are ignored.

Parameters:

configuration - the configuration

Returns:

an updated builder

config

@Deprecated
public WebServer.Builder config(Supplier<ServerConfiguration> configurationBuilder)

Deprecated.

since 2.0.0 - see config(ServerConfiguration)

Set a configuration of the WebServer.

Parameters:

configurationBuilder - the configuration builder

Returns:

an updated builder

config

public WebServer.Builder config(Config config)

Update this server configuration from the config provided.

Specified by:

config in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

config - config located on server node

Returns:

an updated builder

Since:

2.0.0

addNamedRouting

public WebServer.Builder addNamedRouting(String name,
                                         Routing routing)

Associates a dedicated routing with an additional server socket configuration.

The additional server socket configuration must be set as per ServerConfiguration.Builder.addSocket(String, SocketConfiguration). If there is no such named server socket configuration, a IllegalStateException is thrown by the build() method.

Parameters:

name - the named server socket configuration to associate the provided routing with

routing - the routing to associate with the provided name of a named server socket configuration

Returns:

an updated builder

addNamedRouting

public WebServer.Builder addNamedRouting(String name,
                                         Supplier<Routing> routingBuilder)

Associates a dedicated routing with an additional server socket configuration.

The additional server socket configuration must be set as per ServerConfiguration.Builder.addSocket(String, SocketConfiguration). If there is no such named server socket configuration, a IllegalStateException is thrown by the build() method.

Parameters:

name - the named server socket configuration to associate the provided routing with

routingBuilder - the routing builder to associate with the provided name of a named server socket configuration; will be built as a first step of this method execution

Returns:

an updated builder

mediaContext

public WebServer.Builder mediaContext(MediaContext mediaContext)

Description copied from interface: ParentingMediaContextBuilder

Sets the MediaContext parent and overrides the existing one. This method discards all previously registered readers and writers via builder.

Specified by:

mediaContext in interface ParentingMediaContextBuilder<WebServer.Builder>

Parameters:

mediaContext - media context

Returns:

updated instance of the builder

addMediaSupport

public WebServer.Builder addMediaSupport(MediaSupport mediaSupport)

Description copied from interface: MediaContextBuilder

Adds new instance of MediaSupport.

Specified by:

addMediaSupport in interface MediaContextBuilder<WebServer.Builder>

Parameters:

mediaSupport - media support

Returns:

updated instance of the builder

addReader

public WebServer.Builder addReader(MessageBodyReader<?> reader)

Description copied from interface: MediaContextBuilder

Registers new reader.

Specified by:

addReader in interface MediaContextBuilder<WebServer.Builder>

Parameters:

reader - reader

Returns:

updated instance of the builder

addStreamReader

public WebServer.Builder addStreamReader(MessageBodyStreamReader<?> streamReader)

Description copied from interface: MediaContextBuilder

Registers new stream reader.

Specified by:

addStreamReader in interface MediaContextBuilder<WebServer.Builder>

Parameters:

streamReader - stream reader

Returns:

updated instance of the builder

addWriter

public WebServer.Builder addWriter(MessageBodyWriter<?> writer)

Description copied from interface: MediaContextBuilder

Registers new writer.

Specified by:

addWriter in interface MediaContextBuilder<WebServer.Builder>

Parameters:

writer - writer

Returns:

updated instance of the builder

addStreamWriter

public WebServer.Builder addStreamWriter(MessageBodyStreamWriter<?> streamWriter)

Description copied from interface: MediaContextBuilder

Registers new stream writer.

Specified by:

addStreamWriter in interface MediaContextBuilder<WebServer.Builder>

Parameters:

streamWriter - stream writer

Returns:

updated instance of the builder

port

public WebServer.Builder port(int port)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Configures a server port to listen on with the server socket. If port is 0 then any available ephemeral port will be used.

Specified by:

port in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

port - the server port of the server socket

Returns:

this builder

bindAddress

public WebServer.Builder bindAddress(InetAddress bindAddress)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Configures local address where the server listens on with the server socket. If not configured, then listens an all local addresses.

Specified by:

bindAddress in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

bindAddress - an address to bind with the server socket

Returns:

this builder

backlog

public WebServer.Builder backlog(int backlog)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Configures a maximum length of the queue of incoming connections on the server socket.

Default value is SocketConfiguration.DEFAULT_BACKLOG_SIZE.

Specified by:

backlog in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

backlog - a maximum length of the queue of incoming connections

Returns:

this builder

timeout

public WebServer.Builder timeout(long amount,
                                 TimeUnit unit)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Configures a server socket timeout.

Specified by:

timeout in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

amount - an amount of time to configure the timeout, use 0 for infinite timeout

unit - time unit to use with the configured amount

Returns:

this builder

receiveBufferSize

public WebServer.Builder receiveBufferSize(int receiveBufferSize)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Configures proposed value of the TCP receive window that is advertised to the remote peer on the server socket.

If 0 then use implementation default.

Specified by:

receiveBufferSize in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

receiveBufferSize - a buffer size in bytes of the server socket or 0

Returns:

this builder

tls

public WebServer.Builder tls(WebServerTls webServerTls)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Configures SSL for this socket. When configured, the server enforces SSL configuration. If this method is called, any other method except for SocketConfiguration.SocketConfigurationBuilder.tls(java.util.function.Supplier)¨ and repeated invocation of this method would be ignored.

If this method is called again, the previous configuration would be ignored.

Specified by:

tls in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

webServerTls - ssl configuration to use with this socket

Returns:

this builder

maxHeaderSize

public WebServer.Builder maxHeaderSize(int size)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Maximal number of bytes of all header values combined. When a bigger value is received, a Http.Status.BAD_REQUEST_400 is returned.

Default is 16384

Specified by:

maxHeaderSize in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

size - maximal number of bytes of combined header values

Returns:

this builder

maxInitialLineLength

public WebServer.Builder maxInitialLineLength(int length)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Maximal number of characters in the initial HTTP line.

Default is 4096

Specified by:

maxInitialLineLength in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

length - maximal number of characters

Returns:

this builder

enableCompression

public WebServer.Builder enableCompression(boolean value)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Enable negotiation for gzip/deflate content encodings. Clients can request compression using the "Accept-Encoding" header.

Default is false

Specified by:

enableCompression in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

value - compression flag

Returns:

this builder

maxPayloadSize

public WebServer.Builder maxPayloadSize(long size)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Set a maximum payload size for a client request. Can prevent DoS attacks.

Specified by:

maxPayloadSize in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

size - maximum payload size

Returns:

this builder

backpressureBufferSize

public WebServer.Builder backpressureBufferSize(long backpressureBufferSize)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Maximum length of the response data sending buffer can keep without flushing. Depends on `backpressure-policy` what happens if max buffer size is reached.

Specified by:

backpressureBufferSize in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

backpressureBufferSize - maximum non-flushed data Netty can buffer until backpressure is applied

Returns:

this builder

backpressureStrategy

public WebServer.Builder backpressureStrategy(BackpressureStrategy backpressureStrategy)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Sets a backpressure strategy for the server to apply against user provided response upstream.

• LINEAR - Data are requested one-by-one, in case buffer reaches watermark, no other data is requested.
• AUTO_FLUSH - Data are requested one-by-one, in case buffer reaches watermark, no other data is requested.
• PREFETCH - After first data chunk arrives, probable number of chunks needed to fill the buffer up to watermark is calculated and requested.
• NONE - No backpressure is applied, Long.MAX_VALUE(unbounded) is requested from upstream.

Specified by:

backpressureStrategy in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

backpressureStrategy - One of NONE, PREFETCH, LINEAR or AUTO_FLUSH, default is AUTO_FLUSH

Returns:

this builder

continueImmediately

public WebServer.Builder continueImmediately(boolean continueImmediately)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

When true WebServer answers to expect continue with 100 continue immediately, not waiting for user to actually request the data.

Default is false

Specified by:

continueImmediately in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

continueImmediately - , answer with 100 continue immediately after expect continue, default is false

Returns:

this builder

addRequestedUriDiscoveryType

public WebServer.Builder addRequestedUriDiscoveryType(SocketConfiguration.RequestedUriDiscoveryType type)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Adds a type of front-end URI discovery Helidon should use for this socket. Adding a discovery type automatically enables discovery for the socket.

Specified by:

addRequestedUriDiscoveryType in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

type - type to add

Returns:

updated builder

requestedUriDiscoveryTypes

public WebServer.Builder requestedUriDiscoveryTypes(List<SocketConfiguration.RequestedUriDiscoveryType> types)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Assigns the front-end URI discovery type(s) this socket should use. This setting automatically enables discovery for the socket.

Specified by:

requestedUriDiscoveryTypes in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

types - SocketConfiguration.RequestedUriDiscoveryType values to assign

Returns:

updated builder

See Also:

SocketConfiguration.SocketConfigurationBuilder.addRequestedUriDiscoveryType(io.helidon.webserver.SocketConfiguration.RequestedUriDiscoveryType), SocketConfiguration.SocketConfigurationBuilder.requestedUriDiscoveryEnabled(boolean), ServerRequest.requestedUri()

requestedUriDiscoveryEnabled

public WebServer.Builder requestedUriDiscoveryEnabled(boolean enabled)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Sets whether requested URI discovery is enabled for the socket.

Specified by:

requestedUriDiscoveryEnabled in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

enabled - whether to enable discovery

Returns:

updated builder

See Also:

ServerRequest.requestedUri()

trustedProxies

public WebServer.Builder trustedProxies(AllowList trustedProxies)

Description copied from interface: SocketConfiguration.SocketConfigurationBuilder

Assigns the settings governing the acceptance and rejection of forwarded headers from incoming requests to this socket. This setting automatically enables discovery for the socket.

Specified by:

trustedProxies in interface SocketConfiguration.SocketConfigurationBuilder<WebServer.Builder>

Parameters:

trustedProxies - to apply to forwarded headers

Returns:

updated builder

See Also:

ServerRequest.requestedUri()

experimental

public WebServer.Builder experimental(ExperimentalConfiguration experimental)

Configure experimental features.

Parameters:

experimental - experimental configuration

Returns:

an updated builder

update

public WebServer.Builder update(Consumer<WebServer.Builder> updateFunction)

A helper method to support fluentAPI when invoking another method.

Example:

     WebServer.Builder builder = WebServer.builder();
     updateBuilder(builder);
     return builder.build();
 

Can be changed to:

     return WebServer.builder()
              .update(this::updateBuilder)
              .build();
 

Parameters:

updateFunction - function to update this builder

Returns:

an updated builder

addSocket

@Deprecated
public WebServer.Builder addSocket(String name,
                                   SocketConfiguration socketConfiguration)

Deprecated.

since 2.0.0, please use addSocket(SocketConfiguration) instead, name is now part of socket configuration

Adds an additional named server socket configuration. As a result, the server will listen on multiple ports.

An additional named server socket may have a dedicated Routing configured through addNamedRouting(String, Routing).

Parameters:

name - the name of the additional server socket configuration

socketConfiguration - the additional named server socket configuration, never null

Returns:

an updated builder

addSocket

public WebServer.Builder addSocket(SocketConfiguration config)

Adds an additional named server socket configuration. As a result, the server will listen on multiple ports.

An additional named server socket may have a dedicated Routing configured through addNamedRouting(String, Routing).

Parameters:

config - the additional named server socket configuration, never null

Returns:

an updated builder

addSocket

@Deprecated
public WebServer.Builder addSocket(String name,
                                   Supplier<SocketConfiguration> socketConfigurationBuilder)

Deprecated.

since 2.0.0, please use addSocket(Supplier) instead, name is now part of socket configuration

Adds an additional named server socket configuration builder. As a result, the server will listen on multiple ports.

An additional named server socket may have a dedicated Routing configured through addNamedRouting(String, Routing).

Parameters:

name - the name of the additional server socket configuration

socketConfigurationBuilder - the additional named server socket configuration builder; will be built as a first step of this method execution

Returns:

an updated builder

addSocket

public WebServer.Builder addSocket(Supplier<SocketConfiguration> socketConfigurationBuilder)

Adds an additional named server socket configuration builder. As a result, the server will listen on multiple ports.

An additional named server socket may have a dedicated Routing configured through addNamedRouting(String, Routing).

Parameters:

socketConfigurationBuilder - the additional named server socket configuration builder; will be built as a first step of this method execution

Returns:

an updated builder

addSocket

public WebServer.Builder addSocket(SocketConfiguration socketConfiguration,
                                   Routing routing)

Add a named socket and routing.

Parameters:

socketConfiguration - named configuration of the socket

routing - routing to use for this socket

Returns:

an updated builder

tracer

public WebServer.Builder tracer(Tracer tracer)

Sets an opentracing.io tracer. (Default is GlobalTracer.)

Parameters:

tracer - a tracer to set

Returns:

an updated builder

tracer

public WebServer.Builder tracer(Supplier<? extends Tracer> tracerBuilder)

Sets an opentracing.io tracer. (Default is GlobalTracer.)

Parameters:

tracerBuilder - a tracer builder to set; will be built as a first step of this method execution

Returns:

updated builder

hasSocket

public boolean hasSocket(String socketName)

A method to validate a named socket configuration exists in this builder.

Parameters:

socketName - name of the socket, using WebServer.DEFAULT_SOCKET_NAME will always return true

Returns:

true in case the named socket is configured in this builder

context

public WebServer.Builder context(Context context)

Configure the application scoped context to be used as a parent for webserver request contexts.

Parameters:

context - top level context

Returns:

an updated builder

workersCount

public WebServer.Builder workersCount(int workers)

Sets a count of threads in pool used to process HTTP requests. Default value is CPU_COUNT * 2.

Configuration key: workers

Parameters:

workers - a workers count

Returns:

an updated builder

printFeatureDetails

public WebServer.Builder printFeatureDetails(boolean shouldPrint)

Set to true to print detailed feature information on startup.

Parameters:

shouldPrint - whether to print details or not

Returns:

updated builder instance

See Also:

HelidonFeatures

directHandler

public WebServer.Builder directHandler(DirectHandler handler,
                                       DirectHandler.EventType... types)

Provide a custom handler for events that bypass routing. The handler can customize status, headers and message.

Examples of bad request (DirectHandler.EventType.BAD_REQUEST:

• Invalid character in path
• Content-Length header set to a non-integer value
• Invalid first line of the HTTP request

Parameters:

handler - direct handler to use

types - event types to handle with the provided handler

Returns:

updated builder