org.apache.hc.client5.http.impl.async

## Class HttpAsyncClientBuilder

- java.lang.Object
- - org.apache.hc.client5.http.impl.async.HttpAsyncClientBuilder

- Direct Known Subclasses:
    CachingHttpAsyncClientBuilder

      public class HttpAsyncClientBuilder
      extends Object

  Builder for `CloseableHttpAsyncClient` instances that can negotiate the most optimal HTTP protocol version during the `TLS` handshake with `ALPN` extension if supported by the Java runtime.

  Concurrent message exchanges executed by `CloseableHttpAsyncClient` instances created with this builder will get automatically assigned to separate connections leased from the connection pool.

  When a particular component is not explicitly set this class will use its default implementation. System properties will be taken into account when configuring the default implementations when `useSystemProperties()` method is called prior to calling `build()`.

  - http.proxyHost
  - http.proxyPort
  - https.proxyHost
  - https.proxyPort
  - http.nonProxyHosts
  - http.keepAlive
  - http.agent

  Please note that some settings used by this class can be mutually exclusive and may not apply when building `CloseableHttpAsyncClient` instances.

  Since:
    5.0

- - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `HttpAsyncClientBuilder()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected void` | `addCloseable(Closeable closeable)` Adds to the list of `Closeable` resources to be managed by the client.
    `HttpAsyncClientBuilder` | `addExecInterceptorAfter(String existing, String name, AsyncExecChainHandler interceptor)` Adds this execution interceptor after interceptor with the given name.
    `HttpAsyncClientBuilder` | `addExecInterceptorBefore(String existing, String name, AsyncExecChainHandler interceptor)` Adds this execution interceptor before an existing interceptor.
    `HttpAsyncClientBuilder` | `addExecInterceptorFirst(String name, AsyncExecChainHandler interceptor)` Add an interceptor to the head of the processing list.
    `HttpAsyncClientBuilder` | `addExecInterceptorLast(String name, AsyncExecChainHandler interceptor)` Add an interceptor to the tail of the processing list.
    `HttpAsyncClientBuilder` | `addRequestInterceptorFirst(org.apache.hc.core5.http.HttpRequestInterceptor interceptor)` Adds this protocol interceptor to the head of the protocol processing list.
    `HttpAsyncClientBuilder` | `addRequestInterceptorLast(org.apache.hc.core5.http.HttpRequestInterceptor interceptor)` Adds this protocol interceptor to the tail of the protocol processing list.
    `HttpAsyncClientBuilder` | `addResponseInterceptorFirst(org.apache.hc.core5.http.HttpResponseInterceptor interceptor)` Adds this protocol interceptor to the head of the protocol processing list.
    `HttpAsyncClientBuilder` | `addResponseInterceptorLast(org.apache.hc.core5.http.HttpResponseInterceptor interceptor)` Adds this protocol interceptor to the tail of the protocol processing list.
    `CloseableHttpAsyncClient` | `build()`
    `static HttpAsyncClientBuilder` | `create()`
    `protected void` | `customizeExecChain(org.apache.hc.core5.http.config.NamedElementChain<AsyncExecChainHandler> execChainDefinition)` Request exec chain customization and extension.
    `HttpAsyncClientBuilder` | `disableAuthCaching()` Disables authentication scheme caching.
    `HttpAsyncClientBuilder` | `disableAutomaticRetries()` Disables automatic request recovery and re-execution.
    `HttpAsyncClientBuilder` | `disableConnectionState()` Disables connection state tracking.
    `HttpAsyncClientBuilder` | `disableCookieManagement()` Disables state (cookie) management.
    `HttpAsyncClientBuilder` | `disableRedirectHandling()` Disables automatic redirect handling.
    `HttpAsyncClientBuilder` | `evictExpiredConnections()` Makes this instance of HttpClient proactively evict expired connections from the connection pool using a background thread.
    `HttpAsyncClientBuilder` | `evictIdleConnections(org.apache.hc.core5.util.TimeValue maxIdleTime)` Makes this instance of HttpClient proactively evict idle connections from the connection pool using a background thread.
    `HttpAsyncClientBuilder` | `replaceExecInterceptor(String existing, AsyncExecChainHandler interceptor)` Replace an existing interceptor with the given name with new interceptor.
    `HttpAsyncClientBuilder` | `setCharCodingConfig(org.apache.hc.core5.http.config.CharCodingConfig charCodingConfig)` Sets `CharCodingConfig` configuration.
    `HttpAsyncClientBuilder` | `setConnectionManager(AsyncClientConnectionManager connManager)` Assigns `AsyncClientConnectionManager` instance.
    `HttpAsyncClientBuilder` | `setConnectionManagerShared(boolean shared)` Defines the connection manager is to be shared by multiple client instances.
    `HttpAsyncClientBuilder` | `setConnectionReuseStrategy(org.apache.hc.core5.http.ConnectionReuseStrategy reuseStrategy)` Assigns `ConnectionReuseStrategy` instance.
    `HttpAsyncClientBuilder` | `setDefaultAuthSchemeRegistry(org.apache.hc.core5.http.config.Lookup<AuthSchemeFactory> authSchemeRegistry)` Assigns default `AuthScheme` registry which will be used for request execution if not explicitly set in the client execution context.
    `HttpAsyncClientBuilder` | `setDefaultCookieSpecRegistry(org.apache.hc.core5.http.config.Lookup<CookieSpecFactory> cookieSpecRegistry)` Assigns default `CookieSpec` registry which will be used for request execution if not explicitly set in the client execution context.
    `HttpAsyncClientBuilder` | `setDefaultCookieStore(CookieStore cookieStore)` Assigns default `CookieStore` instance which will be used for request execution if not explicitly set in the client execution context.
    `HttpAsyncClientBuilder` | `setDefaultCredentialsProvider(CredentialsProvider credentialsProvider)` Assigns default `CredentialsProvider` instance which will be used for request execution if not explicitly set in the client execution context.
    `HttpAsyncClientBuilder` | `setDefaultHeaders(Collection<? extends org.apache.hc.core5.http.Header> defaultHeaders)` Assigns default request header values.
    `HttpAsyncClientBuilder` | `setDefaultRequestConfig(RequestConfig config)` Assigns default `RequestConfig` instance which will be used for request execution if not explicitly set in the client execution context.
    `HttpAsyncClientBuilder` | `setH2Config(org.apache.hc.core5.http2.config.H2Config h2Config)` Sets `H2Config` configuration.
    `HttpAsyncClientBuilder` | `setHttp1Config(org.apache.hc.core5.http.config.Http1Config h1Config)` Sets `Http1Config` configuration.
    `HttpAsyncClientBuilder` | `setIOReactorConfig(org.apache.hc.core5.reactor.IOReactorConfig ioReactorConfig)` Sets `IOReactorConfig` configuration.
    `HttpAsyncClientBuilder` | `setIoReactorExceptionCallback(org.apache.hc.core5.function.Callback<Exception> ioReactorExceptionCallback)` Sets the callback that will be invoked when the client's IOReactor encounters an uncaught exception.
    `HttpAsyncClientBuilder` | `setKeepAliveStrategy(ConnectionKeepAliveStrategy keepAliveStrategy)` Assigns `ConnectionKeepAliveStrategy` instance.
    `HttpAsyncClientBuilder` | `setProxy(org.apache.hc.core5.http.HttpHost proxy)` Assigns default proxy value.
    `HttpAsyncClientBuilder` | `setProxyAuthenticationStrategy(AuthenticationStrategy proxyAuthStrategy)` Assigns `AuthenticationStrategy` instance for proxy authentication.
    `HttpAsyncClientBuilder` | `setRedirectStrategy(RedirectStrategy redirectStrategy)` Assigns `RedirectStrategy` instance.
    `HttpAsyncClientBuilder` | `setRetryStrategy(HttpRequestRetryStrategy retryStrategy)` Assigns `HttpRequestRetryStrategy` instance.
    `HttpAsyncClientBuilder` | `setRoutePlanner(HttpRoutePlanner routePlanner)` Assigns `HttpRoutePlanner` instance.
    `HttpAsyncClientBuilder` | `setSchemePortResolver(SchemePortResolver schemePortResolver)` Assigns `SchemePortResolver` instance.
    `HttpAsyncClientBuilder` | `setTargetAuthenticationStrategy(AuthenticationStrategy targetAuthStrategy)` Assigns `AuthenticationStrategy` instance for target host authentication.
    `HttpAsyncClientBuilder` | `setThreadFactory(ThreadFactory threadFactory)` Assigns `ThreadFactory` instance.
    `HttpAsyncClientBuilder` | `setUserAgent(String userAgent)` Assigns `User-Agent` value.
    `HttpAsyncClientBuilder` | `setUserTokenHandler(UserTokenHandler userTokenHandler)` Assigns `UserTokenHandler` instance.
    `HttpAsyncClientBuilder` | `setVersionPolicy(org.apache.hc.core5.http2.HttpVersionPolicy versionPolicy)` Sets HTTP protocol version policy.
    `HttpAsyncClientBuilder` | `useSystemProperties()` Use system properties when creating and configuring default implementations.

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### HttpAsyncClientBuilder

          protected HttpAsyncClientBuilder()

  - ### Method Detail

    - #### create

          public static HttpAsyncClientBuilder create()

    - #### setVersionPolicy

          public final HttpAsyncClientBuilder setVersionPolicy(org.apache.hc.core5.http2.HttpVersionPolicy versionPolicy)

      Sets HTTP protocol version policy.

    - #### setHttp1Config

          public final HttpAsyncClientBuilder setHttp1Config(org.apache.hc.core5.http.config.Http1Config h1Config)

      Sets `Http1Config` configuration.

    - #### setH2Config

          public final HttpAsyncClientBuilder setH2Config(org.apache.hc.core5.http2.config.H2Config h2Config)

      Sets `H2Config` configuration.

    - #### setConnectionManager

          public final HttpAsyncClientBuilder setConnectionManager(AsyncClientConnectionManager connManager)

      Assigns `AsyncClientConnectionManager` instance.

    - #### setConnectionManagerShared

          public final HttpAsyncClientBuilder setConnectionManagerShared(boolean shared)

      Defines the connection manager is to be shared by multiple client instances.

      If the connection manager is shared its life-cycle is expected to be managed by the caller and it will not be shut down if the client is closed.

      Parameters:
        `shared` - defines whether or not the connection manager can be shared by multiple clients.

    - #### setIOReactorConfig

          public final HttpAsyncClientBuilder setIOReactorConfig(org.apache.hc.core5.reactor.IOReactorConfig ioReactorConfig)

      Sets `IOReactorConfig` configuration.

    - #### setIoReactorExceptionCallback

          public final HttpAsyncClientBuilder setIoReactorExceptionCallback(org.apache.hc.core5.function.Callback<Exception> ioReactorExceptionCallback)

      Sets the callback that will be invoked when the client's IOReactor encounters an uncaught exception.
      Since:
        5.1

    - #### setCharCodingConfig

          public final HttpAsyncClientBuilder setCharCodingConfig(org.apache.hc.core5.http.config.CharCodingConfig charCodingConfig)

      Sets `CharCodingConfig` configuration.

    - #### setConnectionReuseStrategy

          public final HttpAsyncClientBuilder setConnectionReuseStrategy(org.apache.hc.core5.http.ConnectionReuseStrategy reuseStrategy)

      Assigns `ConnectionReuseStrategy` instance.

      Please note this strategy applies to HTTP/1.0 and HTTP/1.1 connections only

    - #### setKeepAliveStrategy

          public final HttpAsyncClientBuilder setKeepAliveStrategy(ConnectionKeepAliveStrategy keepAliveStrategy)

      Assigns `ConnectionKeepAliveStrategy` instance.

    - #### setUserTokenHandler

          public final HttpAsyncClientBuilder setUserTokenHandler(UserTokenHandler userTokenHandler)

      Assigns `UserTokenHandler` instance.

      Please note this value can be overridden by the `disableConnectionState()` method.

    - #### setTargetAuthenticationStrategy

          public final HttpAsyncClientBuilder setTargetAuthenticationStrategy(AuthenticationStrategy targetAuthStrategy)

      Assigns `AuthenticationStrategy` instance for target host authentication.

    - #### setProxyAuthenticationStrategy

          public final HttpAsyncClientBuilder setProxyAuthenticationStrategy(AuthenticationStrategy proxyAuthStrategy)

      Assigns `AuthenticationStrategy` instance for proxy authentication.

    - #### addResponseInterceptorFirst

          public final HttpAsyncClientBuilder addResponseInterceptorFirst(org.apache.hc.core5.http.HttpResponseInterceptor interceptor)

      Adds this protocol interceptor to the head of the protocol processing list.

    - #### addResponseInterceptorLast

          public final HttpAsyncClientBuilder addResponseInterceptorLast(org.apache.hc.core5.http.HttpResponseInterceptor interceptor)

      Adds this protocol interceptor to the tail of the protocol processing list.

    - #### addExecInterceptorBefore

          public final HttpAsyncClientBuilder addExecInterceptorBefore(String existing,
                                                        String name,
                                                        AsyncExecChainHandler interceptor)

      Adds this execution interceptor before an existing interceptor.

    - #### addExecInterceptorAfter

          public final HttpAsyncClientBuilder addExecInterceptorAfter(String existing,
                                                       String name,
                                                       AsyncExecChainHandler interceptor)

      Adds this execution interceptor after interceptor with the given name.

    - #### replaceExecInterceptor

          public final HttpAsyncClientBuilder replaceExecInterceptor(String existing,
                                                      AsyncExecChainHandler interceptor)

      Replace an existing interceptor with the given name with new interceptor.

    - #### addExecInterceptorFirst

          public final HttpAsyncClientBuilder addExecInterceptorFirst(String name,
                                                       AsyncExecChainHandler interceptor)

      Add an interceptor to the head of the processing list.

    - #### addExecInterceptorLast

          public final HttpAsyncClientBuilder addExecInterceptorLast(String name,
                                                      AsyncExecChainHandler interceptor)

      Add an interceptor to the tail of the processing list.

    - #### addRequestInterceptorFirst

          public final HttpAsyncClientBuilder addRequestInterceptorFirst(org.apache.hc.core5.http.HttpRequestInterceptor interceptor)

      Adds this protocol interceptor to the head of the protocol processing list.

    - #### addRequestInterceptorLast

          public final HttpAsyncClientBuilder addRequestInterceptorLast(org.apache.hc.core5.http.HttpRequestInterceptor interceptor)

      Adds this protocol interceptor to the tail of the protocol processing list.

    - #### setRetryStrategy

          public final HttpAsyncClientBuilder setRetryStrategy(HttpRequestRetryStrategy retryStrategy)

      Assigns `HttpRequestRetryStrategy` instance.

      Please note this value can be overridden by the `disableAutomaticRetries()` method.

    - #### setRedirectStrategy

          public HttpAsyncClientBuilder setRedirectStrategy(RedirectStrategy redirectStrategy)

      Assigns `RedirectStrategy` instance.

      Please note this value can be overridden by the `disableRedirectHandling()` method.

    - #### setSchemePortResolver

          public final HttpAsyncClientBuilder setSchemePortResolver(SchemePortResolver schemePortResolver)

      Assigns `SchemePortResolver` instance.

    - #### setThreadFactory

          public final HttpAsyncClientBuilder setThreadFactory(ThreadFactory threadFactory)

      Assigns `ThreadFactory` instance.

    - #### setUserAgent

          public final HttpAsyncClientBuilder setUserAgent(String userAgent)

      Assigns `User-Agent` value.

    - #### setDefaultHeaders

          public final HttpAsyncClientBuilder setDefaultHeaders(Collection<? extends org.apache.hc.core5.http.Header> defaultHeaders)

      Assigns default request header values.

    - #### setProxy

          public final HttpAsyncClientBuilder setProxy(org.apache.hc.core5.http.HttpHost proxy)

      Assigns default proxy value.

      Please note this value can be overridden by the `setRoutePlanner( HttpRoutePlanner)` method.

    - #### setRoutePlanner

          public final HttpAsyncClientBuilder setRoutePlanner(HttpRoutePlanner routePlanner)

      Assigns `HttpRoutePlanner` instance.

    - #### setDefaultCredentialsProvider

          public final HttpAsyncClientBuilder setDefaultCredentialsProvider(CredentialsProvider credentialsProvider)

      Assigns default `CredentialsProvider` instance which will be used for request execution if not explicitly set in the client execution context.

    - #### setDefaultAuthSchemeRegistry

          public final HttpAsyncClientBuilder setDefaultAuthSchemeRegistry(org.apache.hc.core5.http.config.Lookup<AuthSchemeFactory> authSchemeRegistry)

      Assigns default `AuthScheme` registry which will be used for request execution if not explicitly set in the client execution context.

    - #### setDefaultCookieSpecRegistry

          public final HttpAsyncClientBuilder setDefaultCookieSpecRegistry(org.apache.hc.core5.http.config.Lookup<CookieSpecFactory> cookieSpecRegistry)

      Assigns default `CookieSpec` registry which will be used for request execution if not explicitly set in the client execution context.

    - #### setDefaultCookieStore

          public final HttpAsyncClientBuilder setDefaultCookieStore(CookieStore cookieStore)

      Assigns default `CookieStore` instance which will be used for request execution if not explicitly set in the client execution context.

    - #### setDefaultRequestConfig

          public final HttpAsyncClientBuilder setDefaultRequestConfig(RequestConfig config)

      Assigns default `RequestConfig` instance which will be used for request execution if not explicitly set in the client execution context.

    - #### useSystemProperties

          public final HttpAsyncClientBuilder useSystemProperties()

      Use system properties when creating and configuring default implementations.

    - #### disableConnectionState

          public final HttpAsyncClientBuilder disableConnectionState()

      Disables connection state tracking.

    - #### disableRedirectHandling

          public final HttpAsyncClientBuilder disableRedirectHandling()

      Disables automatic redirect handling.

    - #### disableAutomaticRetries

          public final HttpAsyncClientBuilder disableAutomaticRetries()

      Disables automatic request recovery and re-execution.

    - #### disableCookieManagement

          public final HttpAsyncClientBuilder disableCookieManagement()

      Disables state (cookie) management.

    - #### disableAuthCaching

          public final HttpAsyncClientBuilder disableAuthCaching()

      Disables authentication scheme caching.

    - #### evictExpiredConnections

          public final HttpAsyncClientBuilder evictExpiredConnections()

      Makes this instance of HttpClient proactively evict expired connections from the connection pool using a background thread.

      One MUST explicitly close HttpClient with `Closeable.close()` in order to stop and release the background thread.

      Please note this method has no effect if the instance of HttpClient is configured to use a shared connection manager.

      See Also:
        `setConnectionManagerShared(boolean)`, `ConnPoolControl.closeExpired()`

    - #### evictIdleConnections

          public final HttpAsyncClientBuilder evictIdleConnections(org.apache.hc.core5.util.TimeValue maxIdleTime)

      Makes this instance of HttpClient proactively evict idle connections from the connection pool using a background thread.

      One MUST explicitly close HttpClient with `Closeable.close()` in order to stop and release the background thread.

      Please note this method has no effect if the instance of HttpClient is configured to use a shared connection manager.

      Parameters:
        `maxIdleTime` - maximum time persistent connections can stay idle while kept alive in the connection pool. Connections whose inactivity period exceeds this value will get closed and evicted from the pool.
      See Also:
        `setConnectionManagerShared(boolean)`, `ConnPoolControl.closeIdle(TimeValue)`

    - #### customizeExecChain

          @Internal
          protected void customizeExecChain(org.apache.hc.core5.http.config.NamedElementChain<AsyncExecChainHandler> execChainDefinition)

      Request exec chain customization and extension.

      For internal use.

    - #### addCloseable

          @Internal
          protected void addCloseable(Closeable closeable)

      Adds to the list of `Closeable` resources to be managed by the client.

      For internal use.

    - #### build

          public CloseableHttpAsyncClient build()

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