Package com.linecorp.armeria.client

Class WebClientBuilder

java.lang.Object

com.linecorp.armeria.client.AbstractClientOptionsBuilder

com.linecorp.armeria.client.AbstractWebClientBuilder

com.linecorp.armeria.client.WebClientBuilder

public final class WebClientBuilder
extends AbstractWebClientBuilder

Creates a new web client that connects to the specified URI using the builder pattern. Use the factory methods in WebClient if you do not have many options to override. Please refer to ClientBuilder for how decorators and HTTP headers are configured

Method Summary

Modifier and Type	Method	Description
WebClientBuilder	addHeader(CharSequence name, Object value)	Adds the default HTTP header for an HttpRequest that will be sent by this Client.
WebClientBuilder	addHeaders(Iterable<? extends Map.Entry<? extends CharSequence,?>> headers)	Adds the default HTTP headers for an HttpRequest that will be sent by this Client.
WebClientBuilder	auth(AuthToken token)	Sets the AuthToken header using HttpHeaderNames.AUTHORIZATION.
WebClientBuilder	auth(BasicToken token)	Sets the HTTP basic access authentication header using HttpHeaderNames.AUTHORIZATION.
WebClientBuilder	auth(OAuth1aToken token)	Sets the OAuth Core 1.0 Revision A header using HttpHeaderNames.AUTHORIZATION.
WebClientBuilder	auth(OAuth2Token token)	Sets the OAuth 2.0 header using HttpHeaderNames.AUTHORIZATION.
WebClient	build()	Returns a newly-created web client based on the properties of this builder.
WebClientBuilder	clearDecorators()	Clears all HTTP-level and RPC-level decorators set so far.
WebClientBuilder	contextCustomizer(Consumer<? super ClientRequestContext> contextCustomizer)	Adds the specified ClientRequestContext customizer function so that it customizes the context in the thread that initiated the client call.
WebClientBuilder	decorator(DecoratingHttpClientFunction decorator)	Adds the specified HTTP-level decorator.
WebClientBuilder	decorator(Function<? super HttpClient,? extends HttpClient> decorator)	Adds the specified HTTP-level decorator.
WebClientBuilder	endpointRemapper(Function<? super Endpoint,? extends EndpointGroup> endpointRemapper)	Sets a Function that remaps an Endpoint into an EndpointGroup.
WebClientBuilder	factory(ClientFactory factory)	Sets the ClientFactory used for creating a client.
WebClientBuilder	followRedirects()	Enables automatic redirection.
WebClientBuilder	followRedirects(RedirectConfig redirectConfig)	Sets the RedirectConfig to enable automatic redirection.
WebClientBuilder	maxResponseLength(long maxResponseLength)	Sets the maximum allowed length of a server response in bytes.
<T> WebClientBuilder	option(ClientOption<T> option, T value)	Adds the specified ClientOption and its value.
<T> WebClientBuilder	option(ClientOptionValue<T> optionValue)	Adds the specified ClientOptionValue.
WebClientBuilder	options(ClientOptions options)	Adds the specified ClientOptions.
WebClientBuilder	options(ClientOptionValue<?>... options)	Adds the specified ClientOptionValues.
WebClientBuilder	options(Iterable<ClientOptionValue<?>> options)	Adds the specified ClientOptionValues.
WebClientBuilder	requestIdGenerator(Supplier<RequestId> requestIdGenerator)	Sets the Supplier that generates a RequestId.
WebClientBuilder	responseTimeout(Duration responseTimeout)	Sets the timeout of a response.
WebClientBuilder	responseTimeoutMillis(long responseTimeoutMillis)	Sets the timeout of a response in milliseconds.
WebClientBuilder	rpcDecorator(DecoratingRpcClientFunction decorator)	Deprecated.
WebClientBuilder	rpcDecorator(Function<? super RpcClient,? extends RpcClient> decorator)	Deprecated.
WebClientBuilder	setHeader(CharSequence name, Object value)	Sets the default HTTP header for an HttpRequest that will be sent by this Client.
WebClientBuilder	setHeaders(Iterable<? extends Map.Entry<? extends CharSequence,?>> headers)	Sets the default HTTP headers for an HttpRequest that will be sent by this Client.
WebClientBuilder	successFunction(SuccessFunction successFunction)	Sets a SuccessFunction that determines whether a request was handled successfully or not.
WebClientBuilder	writeTimeout(Duration writeTimeout)	Sets the timeout of a socket write attempt.
WebClientBuilder	writeTimeoutMillis(long writeTimeoutMillis)	Sets the timeout of a socket write attempt in milliseconds.

Methods inherited from class com.linecorp.armeria.client.AbstractWebClientBuilder

buildWebClient, clientBuilderParams

Methods inherited from class com.linecorp.armeria.client.AbstractClientOptionsBuilder

buildOptions, buildOptions

Methods inherited from class java.lang.Object

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

Method Details

build

public WebClient build()

Returns a newly-created web client based on the properties of this builder.

Throws:

IllegalArgumentException - if the scheme of the uri specified in WebClient.builder(String) or WebClient.builder(URI) is not an HTTP scheme

rpcDecorator

@Deprecated
public WebClientBuilder rpcDecorator(Function<? super RpcClient,? extends RpcClient> decorator)

Deprecated.

Description copied from class: AbstractWebClientBuilder

Raises an UnsupportedOperationException because this builder doesn't support RPC-level but only HTTP-level decorators.

Overrides:

rpcDecorator in class AbstractWebClientBuilder

Parameters:

decorator - the Function that transforms an RpcClient to another

rpcDecorator

@Deprecated
public WebClientBuilder rpcDecorator(DecoratingRpcClientFunction decorator)

Deprecated.

Description copied from class: AbstractWebClientBuilder

Raises an UnsupportedOperationException because this builder doesn't support RPC-level but only HTTP-level decorators.

Overrides:

rpcDecorator in class AbstractWebClientBuilder

Parameters:

decorator - the DecoratingRpcClientFunction that intercepts an invocation

options

public WebClientBuilder options(ClientOptions options)

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientOptions.

Overrides:

options in class AbstractClientOptionsBuilder

options

public WebClientBuilder options(ClientOptionValue<?>... options)

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientOptionValues.

Overrides:

options in class AbstractClientOptionsBuilder

options

public WebClientBuilder options(Iterable<ClientOptionValue<?>> options)

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientOptionValues.

Overrides:

options in class AbstractClientOptionsBuilder

option

public <T> WebClientBuilder option(ClientOption<T> option,
 T value)

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientOption and its value.

Overrides:

option in class AbstractClientOptionsBuilder

option

public <T> WebClientBuilder option(ClientOptionValue<T> optionValue)

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientOptionValue.

Overrides:

option in class AbstractClientOptionsBuilder

factory

public WebClientBuilder factory(ClientFactory factory)

Description copied from class: AbstractClientOptionsBuilder

Sets the ClientFactory used for creating a client. The default is ClientFactory.ofDefault().

Overrides:

factory in class AbstractClientOptionsBuilder

writeTimeout

public WebClientBuilder writeTimeout(Duration writeTimeout)

Description copied from class: AbstractClientOptionsBuilder

Sets the timeout of a socket write attempt.

Overrides:

writeTimeout in class AbstractClientOptionsBuilder

Parameters:

writeTimeout - the timeout. 0 disables the timeout.

writeTimeoutMillis

public WebClientBuilder writeTimeoutMillis(long writeTimeoutMillis)

Description copied from class: AbstractClientOptionsBuilder

Sets the timeout of a socket write attempt in milliseconds.

Overrides:

writeTimeoutMillis in class AbstractClientOptionsBuilder

Parameters:

writeTimeoutMillis - the timeout in milliseconds. 0 disables the timeout.

responseTimeout

public WebClientBuilder responseTimeout(Duration responseTimeout)

Description copied from class: AbstractClientOptionsBuilder

Sets the timeout of a response.

Overrides:

responseTimeout in class AbstractClientOptionsBuilder

Parameters:

responseTimeout - the timeout. 0 disables the timeout.

responseTimeoutMillis

public WebClientBuilder responseTimeoutMillis(long responseTimeoutMillis)

Description copied from class: AbstractClientOptionsBuilder

Sets the timeout of a response in milliseconds.

Overrides:

responseTimeoutMillis in class AbstractClientOptionsBuilder

Parameters:

responseTimeoutMillis - the timeout in milliseconds. 0 disables the timeout.

maxResponseLength

public WebClientBuilder maxResponseLength(long maxResponseLength)

Description copied from class: AbstractClientOptionsBuilder

Sets the maximum allowed length of a server response in bytes.

Overrides:

maxResponseLength in class AbstractClientOptionsBuilder

Parameters:

maxResponseLength - the maximum length in bytes. 0 disables the limit.

requestIdGenerator

public WebClientBuilder requestIdGenerator(Supplier<RequestId> requestIdGenerator)

Description copied from class: AbstractClientOptionsBuilder

Sets the Supplier that generates a RequestId.

Overrides:

requestIdGenerator in class AbstractClientOptionsBuilder

successFunction

public WebClientBuilder successFunction(SuccessFunction successFunction)

Description copied from class: AbstractClientOptionsBuilder

Sets a SuccessFunction that determines whether a request was handled successfully or not. If unspecified, SuccessFunction.ofDefault() is used.

Overrides:

successFunction in class AbstractClientOptionsBuilder

endpointRemapper

public WebClientBuilder endpointRemapper(Function<? super Endpoint,? extends EndpointGroup> endpointRemapper)

Description copied from class: AbstractClientOptionsBuilder

Sets a Function that remaps an Endpoint into an EndpointGroup. This ClientOption is useful when you need to override a single target host into a group of hosts to enable client-side load-balancing, e.g.

 MyService.Iface client =
     Clients.newClient("tbinary+http://example.com/api",
                       MyService.Iface.class);

 EndpointGroup myGroup = EndpointGroup.of(Endpoint.of("node-1.example.com")),
                                          Endpoint.of("node-2.example.com")));

 MyService.Iface derivedClient =
     Clients.newDerivedClient(client, options -> {
         return options.toBuilder()
                       .endpointRemapper(endpoint -> {
                           if (endpoint.host().equals("example.com")) {
                               return myGroup;
                           } else {
                               return endpoint;
                           }
                       })
                       .build();
     });

 // This request goes to 'node-1.example.com' or 'node-2.example.com'.
 derivedClient.call();
 

Note that the remapping does not occur recursively but only once.

Overrides:

endpointRemapper in class AbstractClientOptionsBuilder

See Also:

• ClientOptions.ENDPOINT_REMAPPER
• ClientOptions.endpointRemapper()

decorator

public WebClientBuilder decorator(Function<? super HttpClient,? extends HttpClient> decorator)

Description copied from class: AbstractClientOptionsBuilder

Adds the specified HTTP-level decorator.

Overrides:

decorator in class AbstractClientOptionsBuilder

Parameters:

decorator - the Function that transforms an HttpClient to another

decorator

public WebClientBuilder decorator(DecoratingHttpClientFunction decorator)

Description copied from class: AbstractClientOptionsBuilder

Adds the specified HTTP-level decorator.

Overrides:

decorator in class AbstractClientOptionsBuilder

Parameters:

decorator - the DecoratingHttpClientFunction that intercepts an invocation

clearDecorators

public WebClientBuilder clearDecorators()

Description copied from class: AbstractClientOptionsBuilder

Clears all HTTP-level and RPC-level decorators set so far.

Overrides:

clearDecorators in class AbstractClientOptionsBuilder

addHeader

public WebClientBuilder addHeader(CharSequence name,
 Object value)

Description copied from class: AbstractClientOptionsBuilder

Adds the default HTTP header for an HttpRequest that will be sent by this Client.

Note that the values of the default HTTP headers could be overridden if the same HttpHeaderNames are defined in the HttpRequest.headers() or ClientRequestContext.additionalRequestHeaders().

Overrides:

addHeader in class AbstractClientOptionsBuilder

addHeaders

public WebClientBuilder addHeaders(Iterable<? extends Map.Entry<? extends CharSequence,?>> headers)

Description copied from class: AbstractClientOptionsBuilder

Adds the default HTTP headers for an HttpRequest that will be sent by this Client.

Note that the values of the default HTTP headers could be overridden if the same HttpHeaderNames are defined in the HttpRequest.headers() or ClientRequestContext.additionalRequestHeaders().

Overrides:

addHeaders in class AbstractClientOptionsBuilder

setHeader

public WebClientBuilder setHeader(CharSequence name,
 Object value)

Description copied from class: AbstractClientOptionsBuilder

Sets the default HTTP header for an HttpRequest that will be sent by this Client.

Note that the default HTTP header could be overridden if the same HttpHeaderNames are defined in HttpRequest.headers() or ClientRequestContext.additionalRequestHeaders().

Overrides:

setHeader in class AbstractClientOptionsBuilder

setHeaders

public WebClientBuilder setHeaders(Iterable<? extends Map.Entry<? extends CharSequence,?>> headers)

Description copied from class: AbstractClientOptionsBuilder

Sets the default HTTP headers for an HttpRequest that will be sent by this Client.

Note that the values of the default HTTP headers could be overridden if the same HttpHeaderNames are defined in HttpRequest.headers() or ClientRequestContext.additionalRequestHeaders().

Overrides:

setHeaders in class AbstractClientOptionsBuilder

auth

public WebClientBuilder auth(BasicToken token)

Description copied from class: AbstractClientOptionsBuilder

Sets the HTTP basic access authentication header using HttpHeaderNames.AUTHORIZATION.

Overrides:

auth in class AbstractClientOptionsBuilder

auth

public WebClientBuilder auth(OAuth1aToken token)

Description copied from class: AbstractClientOptionsBuilder

Sets the OAuth Core 1.0 Revision A header using HttpHeaderNames.AUTHORIZATION.

Overrides:

auth in class AbstractClientOptionsBuilder

auth

public WebClientBuilder auth(OAuth2Token token)

Description copied from class: AbstractClientOptionsBuilder

Sets the OAuth 2.0 header using HttpHeaderNames.AUTHORIZATION.

Overrides:

auth in class AbstractClientOptionsBuilder

auth

public WebClientBuilder auth(AuthToken token)

Description copied from class: AbstractClientOptionsBuilder

Sets the AuthToken header using HttpHeaderNames.AUTHORIZATION.

Overrides:

auth in class AbstractClientOptionsBuilder

followRedirects

public WebClientBuilder followRedirects()

Description copied from class: AbstractClientOptionsBuilder

Enables automatic redirection.

Overrides:

followRedirects in class AbstractClientOptionsBuilder

followRedirects

public WebClientBuilder followRedirects(RedirectConfig redirectConfig)

Description copied from class: AbstractClientOptionsBuilder

Sets the RedirectConfig to enable automatic redirection.

Overrides:

followRedirects in class AbstractClientOptionsBuilder

contextCustomizer

public WebClientBuilder contextCustomizer(Consumer<? super ClientRequestContext> contextCustomizer)

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientRequestContext customizer function so that it customizes the context in the thread that initiated the client call. The given customizer function is evaluated before the customizer function specified by Clients.withContextCustomizer(Consumer).

 static final ThreadLocal<String> USER_ID = new ThreadLocal<>();
 static final AttributeKey<String> USER_ID_ATTR = AttributeKey.valueOf("USER_ID");
 ...
 MyClientStub client =
     Clients.builder(...)
            .contextCustomizer(ctx -> {
                // This customizer will be invoked from the thread that initiates a client call.
                ctx.setAttr(USER_ID_ATTR, USER_ID.get());
            })
            .build(MyClientStub.class);

 // Good:
 // The context data is set by the thread that initiates the client call.
 USER_ID.set("user1");
 try {
     client.executeSomething1(..);
     ...
     client.executeSomethingN(..);
 } finally {
     // Should clean up the thread local storage.
     USER_ID.remove();
 }

 // Bad:
 USER_ID.set("user1");
 executor.execute(() -> {
     // The variable in USER_ID won't be propagated to the context.
     // The variable is not valid at the moment client.executeSomething1() is called.
      client.executeSomething1(..);
 });
 

Note that certain properties of ClientRequestContext, such as:

• ClientRequestContext.endpoint()
• RequestContext.localAddress()
• RequestContext.remoteAddress()

may be null while the customizer function runs, because the target host of the Request is not determined yet.

Overrides:

contextCustomizer in class AbstractClientOptionsBuilder

See Also:

• Clients.withContextCustomizer(Consumer)