Package com.linecorp.armeria.client

Class RestClientBuilder

java.lang.Object

com.linecorp.armeria.client.AbstractClientOptionsBuilder

com.linecorp.armeria.client.AbstractWebClientBuilder

com.linecorp.armeria.client.RestClientBuilder

@UnstableApi
public final class RestClientBuilder
extends AbstractWebClientBuilder

Creates a new REST client that connects to the specified URI using the builder pattern. This client is designed to easily exchange RESTful APIs.

Use the factory methods in RestClient 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
RestClientBuilder	addHeader(CharSequence name, Object value)	Adds the default HTTP header for an HttpRequest that will be sent by this Client.
RestClientBuilder	addHeaders(Iterable<? extends Map.Entry<? extends CharSequence,?>> headers)	Adds the default HTTP headers for an HttpRequest that will be sent by this Client.
RestClientBuilder	auth(AuthToken token)	Sets the AuthToken header using HttpHeaderNames.AUTHORIZATION.
RestClientBuilder	auth(BasicToken token)	Sets the HTTP basic access authentication header using HttpHeaderNames.AUTHORIZATION.
RestClientBuilder	auth(OAuth1aToken token)	Sets the OAuth Core 1.0 Revision A header using HttpHeaderNames.AUTHORIZATION.
RestClientBuilder	auth(OAuth2Token token)	Sets the OAuth 2.0 header using HttpHeaderNames.AUTHORIZATION.
RestClient	build()	Returns a newly-created web client based on the properties of this builder.
RestClientBuilder	clearDecorators()	Clears all HTTP-level and RPC-level decorators set so far.
RestClientBuilder	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.
RestClientBuilder	contextHook(Supplier<? extends AutoCloseable> contextHook)	Sets the Supplier which provides an AutoCloseable and will be called whenever this RequestContext is popped from the RequestContextStorage.
RestClientBuilder	decorator(DecoratingHttpClientFunction decorator)	Adds the specified HTTP-level decorator.
RestClientBuilder	decorator(Function<? super HttpClient,? extends HttpClient> decorator)	Adds the specified HTTP-level decorator.
RestClientBuilder	endpointRemapper(Function<? super Endpoint,? extends EndpointGroup> endpointRemapper)	Sets a Function that remaps an Endpoint into an EndpointGroup.
RestClientBuilder	factory(ClientFactory factory)	Sets the ClientFactory used for creating a client.
RestClientBuilder	followRedirects()	Enables automatic redirection.
RestClientBuilder	followRedirects(RedirectConfig redirectConfig)	Sets the RedirectConfig to enable automatic redirection.
RestClientBuilder	maxResponseLength(long maxResponseLength)	Sets the maximum allowed length of a server response in bytes.
<T> RestClientBuilder	option(ClientOption<T> option, T value)	Adds the specified ClientOption and its value.
<T> RestClientBuilder	option(ClientOptionValue<T> optionValue)	Adds the specified ClientOptionValue.
RestClientBuilder	options(ClientOptions options)	Adds the specified ClientOptions.
RestClientBuilder	options(ClientOptionValue<?>... options)	Adds the specified ClientOptionValues.
RestClientBuilder	options(Iterable<ClientOptionValue<?>> options)	Adds the specified ClientOptionValues.
RestClientBuilder	requestAutoAbortDelay(Duration delay)	Sets the amount of time to wait before aborting an HttpRequest when its corresponding HttpResponse is complete.
RestClientBuilder	requestAutoAbortDelayMillis(long delayMillis)	Sets the amount of time in millis to wait before aborting an HttpRequest when its corresponding HttpResponse is complete.
RestClientBuilder	requestIdGenerator(Supplier<RequestId> requestIdGenerator)	Sets the Supplier that generates a RequestId.
RestClientBuilder	responseTimeout(Duration responseTimeout)	Sets the timeout of a response.
RestClientBuilder	responseTimeoutMillis(long responseTimeoutMillis)	Sets the timeout of a response in milliseconds.
RestClientBuilder	rpcDecorator(DecoratingRpcClientFunction decorator)	Deprecated.
RestClientBuilder	rpcDecorator(Function<? super RpcClient,? extends RpcClient> decorator)	Deprecated.
RestClientBuilder	setHeader(CharSequence name, Object value)	Sets the default HTTP header for an HttpRequest that will be sent by this Client.
RestClientBuilder	setHeaders(Iterable<? extends Map.Entry<? extends CharSequence,?>> headers)	Sets the default HTTP headers for an HttpRequest that will be sent by this Client.
RestClientBuilder	successFunction(SuccessFunction successFunction)	Sets a SuccessFunction that determines whether a request was handled successfully or not.
RestClientBuilder	writeTimeout(Duration writeTimeout)	Sets the timeout of a socket write attempt.
RestClientBuilder	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 RestClient build()

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

Throws:

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

rpcDecorator

@Deprecated
public RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder options(ClientOptions options)

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientOptions.

Overrides:

options in class AbstractClientOptionsBuilder

options

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

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientOptionValues.

Overrides:

options in class AbstractClientOptionsBuilder

options

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

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientOptionValues.

Overrides:

options in class AbstractClientOptionsBuilder

option

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

Description copied from class: AbstractClientOptionsBuilder

Adds the specified ClientOptionValue.

Overrides:

option in class AbstractClientOptionsBuilder

factory

public RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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.

requestAutoAbortDelay

public RestClientBuilder requestAutoAbortDelay(Duration delay)

Description copied from class: AbstractClientOptionsBuilder

Sets the amount of time to wait before aborting an HttpRequest when its corresponding HttpResponse is complete. This may be useful when you want to send additional data even after the response is complete. Specify Duration.ZERO to abort the HttpRequest immediately. Any negative value will not abort the request automatically. There is no delay by default.

Overrides:

requestAutoAbortDelay in class AbstractClientOptionsBuilder

requestAutoAbortDelayMillis

public RestClientBuilder requestAutoAbortDelayMillis(long delayMillis)

Description copied from class: AbstractClientOptionsBuilder

Sets the amount of time in millis to wait before aborting an HttpRequest when its corresponding HttpResponse is complete. This may be useful when you want to send additional data even after the response is complete. Specify 0 to abort the HttpRequest immediately. Any negative value will not abort the request automatically. There is no delay by default.

Overrides:

requestAutoAbortDelayMillis in class AbstractClientOptionsBuilder

requestIdGenerator

public RestClientBuilder requestIdGenerator(Supplier<RequestId> requestIdGenerator)

Description copied from class: AbstractClientOptionsBuilder

Sets the Supplier that generates a RequestId.

Overrides:

requestIdGenerator in class AbstractClientOptionsBuilder

successFunction

public RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder clearDecorators()

Description copied from class: AbstractClientOptionsBuilder

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

Overrides:

clearDecorators in class AbstractClientOptionsBuilder

addHeader

public RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder 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 RestClientBuilder auth(OAuth2Token token)

Description copied from class: AbstractClientOptionsBuilder

Sets the OAuth 2.0 header using HttpHeaderNames.AUTHORIZATION.

Overrides:

auth in class AbstractClientOptionsBuilder

auth

public RestClientBuilder auth(AuthToken token)

Description copied from class: AbstractClientOptionsBuilder

Sets the AuthToken header using HttpHeaderNames.AUTHORIZATION.

Overrides:

auth in class AbstractClientOptionsBuilder

followRedirects

public RestClientBuilder followRedirects()

Description copied from class: AbstractClientOptionsBuilder

Enables automatic redirection.

Overrides:

followRedirects in class AbstractClientOptionsBuilder

followRedirects

public RestClientBuilder followRedirects(RedirectConfig redirectConfig)

Description copied from class: AbstractClientOptionsBuilder

Sets the RedirectConfig to enable automatic redirection.

Overrides:

followRedirects in class AbstractClientOptionsBuilder

contextCustomizer

public RestClientBuilder 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)

contextHook

public RestClientBuilder contextHook(Supplier<? extends AutoCloseable> contextHook)

Description copied from class: AbstractClientOptionsBuilder

Sets the Supplier which provides an AutoCloseable and will be called whenever this RequestContext is popped from the RequestContextStorage.

Overrides:

contextHook in class AbstractClientOptionsBuilder

Parameters:

contextHook - the Supplier that provides an AutoCloseable