Package org.springframework.integration.http.outbound

Class AbstractHttpRequestExecutingMessageHandler

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

org.springframework.integration.handler.MessageHandlerSupport

org.springframework.integration.handler.AbstractMessageHandler

org.springframework.integration.handler.AbstractMessageProducingHandler

org.springframework.integration.handler.AbstractReplyProducingMessageHandler

org.springframework.integration.http.outbound.AbstractHttpRequestExecutingMessageHandler

All Implemented Interfaces:

org.reactivestreams.Subscriber<Message<?>>, Aware, BeanClassLoaderAware, BeanFactoryAware, BeanNameAware, DisposableBean, InitializingBean, ApplicationContextAware, Ordered, ExpressionCapable, Orderable, MessageProducer, HeaderPropagationAware, IntegrationPattern, NamedComponent, IntegrationManagement, TrackableComponent, MessageHandler, reactor.core.CoreSubscriber<Message<?>>

Direct Known Subclasses:

HttpRequestExecutingMessageHandler, WebFluxRequestExecutingMessageHandler

public abstract class AbstractHttpRequestExecutingMessageHandler
extends AbstractReplyProducingMessageHandler

Base class for http outbound adapter/gateway.

Since:

5.0

Author:

Mark Fisher, Oleg Zhurakousky, Gary Russell, Gunnar Hillert, Artem Bilan, Wallace Wadge, Shiliang Li, Florian Schöffl

Nested Class Summary

Nested classes/interfaces inherited from class org.springframework.integration.handler.AbstractReplyProducingMessageHandler

AbstractReplyProducingMessageHandler.RequestHandler

Nested classes/interfaces inherited from interface org.springframework.integration.support.management.IntegrationManagement

IntegrationManagement.ManagementOverrides

Field Summary

Fields

Modifier and Type	Field	Description
protected final DefaultUriBuilderFactory	uriFactory

Fields inherited from class org.springframework.integration.handler.AbstractMessageProducingHandler

messagingTemplate

Fields inherited from class org.springframework.integration.context.IntegrationObjectSupport

EXPRESSION_PARSER, logger

Fields inherited from interface org.springframework.integration.support.management.IntegrationManagement

METER_PREFIX, RECEIVE_COUNTER_NAME, SEND_TIMER_NAME

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor	Description
AbstractHttpRequestExecutingMessageHandler(Expression uriExpression)

Method Summary

Modifier and Type	Method	Description
protected void	doInit()
protected Object	evaluateTypeFromExpression(Message<?> requestMessage, Expression expression, String property)
protected abstract Object	exchange(Object uri, HttpMethod httpMethod, HttpEntity<?> httpRequest, Object expectedResponseType, Message<?> requestMessage, Map<String,?> uriVariables)
IntegrationPatternType	getIntegrationPatternType()	Return a pattern type this component implements.
protected Object	getReply(ResponseEntity<?> httpResponse)
protected Object	handleRequestMessage(Message<?> requestMessage)	Subclasses must implement this method to handle the request Message.
boolean	isExpectReply()
protected HttpHeaders	mapHeaders(Message<?> message)
void	setCharset(String charset)	Specify the charset name to use for converting String-typed payloads to bytes.
void	setEncodingMode(DefaultUriBuilderFactory.EncodingMode encodingMode)	Set the encoding mode to use.
void	setExpectedResponseType(Class<?> expectedResponseType)	Specify the expected response type for the REST request.
void	setExpectedResponseTypeExpression(Expression expectedResponseTypeExpression)	Specify the Expression to determine the type for the expected response The returned value of the expression could be an instance of Class or String representing a fully qualified class name.
void	setExpectReply(boolean expectReply)	Specify whether a reply Message is expected.
void	setExtractPayload(boolean extractPayload)	Specify whether the outbound message's payload should be extracted when preparing the request body.
void	setExtractResponseBody(boolean extractResponseBody)	The flag to extract a body of the ResponseEntity for reply message payload.
void	setHeaderMapper(HeaderMapper<HttpHeaders> headerMapper)	Set the HeaderMapper to use when mapping between HTTP headers and MessageHeaders.
void	setHttpMethod(HttpMethod httpMethod)	Specify the HttpMethod for requests.
void	setHttpMethodExpression(Expression httpMethodExpression)	Specify the SpEL Expression to determine HttpMethod at runtime.
void	setTransferCookies(boolean transferCookies)	Set to true if you wish 'Set-Cookie' headers in responses to be transferred as 'Cookie' headers in subsequent interactions for a message.
void	setTrustedSpel(boolean trustedSpel)	Set to true if you trust the source of SpEL expressions used to evaluate URI variables.
void	setUriVariableExpressions(Map<String,Expression> uriVariableExpressions)	Set the Map of URI variable expressions to evaluate against the outbound message when replacing the variable placeholders in a URI template.
void	setUriVariablesExpression(Expression uriVariablesExpression)	Set the Expression to evaluate against the outbound message; the expression must evaluate to a Map of URI variable expressions to evaluate against the outbound message when replacing the variable placeholders in a URI template.

Methods inherited from class org.springframework.integration.handler.AbstractReplyProducingMessageHandler

doInvokeAdvisedRequestHandler, getBeanClassLoader, getRequiresReply, handleMessageInternal, hasAdviceChain, onInit, setAdviceChain, setBeanClassLoader, setRequiresReply

Methods inherited from class org.springframework.integration.handler.AbstractMessageProducingHandler

addNotPropagatedHeaders, createOutputMessage, getNotPropagatedHeaders, getOutputChannel, isAsync, messageBuilderForReply, produceOutput, resolveErrorChannel, sendErrorMessage, sendOutput, sendOutputs, setAsync, setNotPropagatedHeaders, setOutputChannel, setOutputChannelName, setSendTimeout, setupMessageProcessor, shouldCopyRequestHeaders, shouldSplitOutput, updateNotPropagatedHeaders

Methods inherited from class org.springframework.integration.handler.AbstractMessageHandler

handleMessage, onComplete, onError, onNext, onSubscribe, setObservationConvention

Methods inherited from class org.springframework.integration.handler.MessageHandlerSupport

buildSendTimer, destroy, getComponentType, getManagedName, getManagedType, getMetricsCaptor, getObservationRegistry, getOrder, getOverrides, isLoggingEnabled, isObserved, registerMetricsCaptor, registerObservationRegistry, sendTimer, setLoggingEnabled, setManagedName, setManagedType, setOrder, setShouldTrack, shouldTrack

Methods inherited from class org.springframework.integration.context.IntegrationObjectSupport

afterPropertiesSet, extractTypeIfPossible, generateId, getApplicationContext, getApplicationContextId, getBeanDescription, getBeanFactory, getBeanName, getChannelResolver, getComponentName, getConversionService, getExpression, getIntegrationProperties, getIntegrationProperty, getMessageBuilderFactory, getTaskScheduler, isInitialized, setApplicationContext, setBeanFactory, setBeanName, setChannelResolver, setComponentName, setConversionService, setMessageBuilderFactory, setPrimaryExpression, setTaskScheduler, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface reactor.core.CoreSubscriber

currentContext

Methods inherited from interface org.springframework.integration.support.management.IntegrationManagement

getThisAs

Methods inherited from interface org.springframework.integration.support.context.NamedComponent

getBeanName, getComponentName

Field Details

uriFactory

protected final DefaultUriBuilderFactory uriFactory

Constructor Details

AbstractHttpRequestExecutingMessageHandler

public AbstractHttpRequestExecutingMessageHandler(Expression uriExpression)

Method Details

setEncodingMode

public void setEncodingMode(DefaultUriBuilderFactory.EncodingMode encodingMode)

Set the encoding mode to use. By default, this is set to DefaultUriBuilderFactory.EncodingMode.TEMPLATE_AND_VALUES. For more complicated scenarios consider configuring an UriTemplateHandler on an externally provided RestTemplate.

Parameters:

encodingMode - the mode to use for uri encoding

Since:

5.3

setHttpMethodExpression

public void setHttpMethodExpression(Expression httpMethodExpression)

Specify the SpEL Expression to determine HttpMethod at runtime.

Parameters:

httpMethodExpression - The method expression.

setHttpMethod

public void setHttpMethod(HttpMethod httpMethod)

Specify the HttpMethod for requests. The default method is POST.

Parameters:

httpMethod - The method.

setExtractPayload

public void setExtractPayload(boolean extractPayload)

Specify whether the outbound message's payload should be extracted when preparing the request body. Otherwise, the Message instance itself is serialized. The default value is true.

Parameters:

extractPayload - true if the payload should be extracted.

setCharset

public void setCharset(String charset)

Specify the charset name to use for converting String-typed payloads to bytes. The default is UTF-8.

Parameters:

charset - The charset.

isExpectReply

public boolean isExpectReply()

Returns:

whether a reply Message is expected.

See Also:

• setExpectReply(boolean)

setExpectReply

public void setExpectReply(boolean expectReply)

Specify whether a reply Message is expected. If not, this handler will simply return null for a successful response or throw an Exception for a non-successful response. The default is true.

Parameters:

expectReply - true if a reply is expected.

setExpectedResponseType

public void setExpectedResponseType(Class<?> expectedResponseType)

Specify the expected response type for the REST request. Otherwise, it is null and an empty ResponseEntity is returned from HTTP client. To take advantage of the HttpMessageConverters registered on this adapter, provide a different type).

Parameters:

expectedResponseType - The expected type. Also see setExpectedResponseTypeExpression(Expression)

setExpectedResponseTypeExpression

public void setExpectedResponseTypeExpression(Expression expectedResponseTypeExpression)

Specify the Expression to determine the type for the expected response The returned value of the expression could be an instance of Class or String representing a fully qualified class name.

Parameters:

expectedResponseTypeExpression - The expected response type expression. Also see setExpectedResponseType(java.lang.Class<?>)

setHeaderMapper

public void setHeaderMapper(HeaderMapper<HttpHeaders> headerMapper)

Set the HeaderMapper to use when mapping between HTTP headers and MessageHeaders.

Parameters:

headerMapper - The header mapper.

setUriVariableExpressions

public void setUriVariableExpressions(Map<String,Expression> uriVariableExpressions)

Set the Map of URI variable expressions to evaluate against the outbound message when replacing the variable placeholders in a URI template.

Parameters:

uriVariableExpressions - The URI variable expressions.

setUriVariablesExpression

public void setUriVariablesExpression(Expression uriVariablesExpression)

Set the Expression to evaluate against the outbound message; the expression must evaluate to a Map of URI variable expressions to evaluate against the outbound message when replacing the variable placeholders in a URI template.

Parameters:

uriVariablesExpression - The URI variables expression.

setTransferCookies

public void setTransferCookies(boolean transferCookies)

Set to true if you wish 'Set-Cookie' headers in responses to be transferred as 'Cookie' headers in subsequent interactions for a message. Defaults to false.

Parameters:

transferCookies - the transferCookies to set.

setTrustedSpel

public void setTrustedSpel(boolean trustedSpel)

Set to true if you trust the source of SpEL expressions used to evaluate URI variables. Default is false, which means a SimpleEvaluationContext is used for evaluating such expressions, which restricts the use of some SpEL capabilities.

Parameters:

trustedSpel - true to trust.

Since:

4.3.15.

setExtractResponseBody

public void setExtractResponseBody(boolean extractResponseBody)

The flag to extract a body of the ResponseEntity for reply message payload. Defaults to true.

Parameters:

extractResponseBody - produce a reply message with a whole ResponseEntity or just its body.

Since:

5.5

getIntegrationPatternType

public IntegrationPatternType getIntegrationPatternType()

Description copied from interface: IntegrationPattern

Return a pattern type this component implements.

Specified by:

getIntegrationPatternType in interface IntegrationPattern

Overrides:

getIntegrationPatternType in class AbstractReplyProducingMessageHandler

Returns:

the IntegrationPatternType this component implements.

doInit

protected void doInit()

Overrides:

doInit in class AbstractReplyProducingMessageHandler

handleRequestMessage

@Nullable
protected Object handleRequestMessage(Message<?> requestMessage)

Description copied from class: AbstractReplyProducingMessageHandler

Subclasses must implement this method to handle the request Message. The return value may be a Message, a MessageBuilder, or any plain Object. The base class will handle the final creation of a reply Message from any of those starting points. If the return value is null, the Message flow will end here.

Specified by:

handleRequestMessage in class AbstractReplyProducingMessageHandler

Parameters:

requestMessage - The request message.

Returns:

The result of handling the message, or null.

exchange

@Nullable
protected abstract Object exchange(Object uri,
 HttpMethod httpMethod,
 HttpEntity<?> httpRequest,
 Object expectedResponseType,
 Message<?> requestMessage,
 Map<String,?> uriVariables)

getReply

protected Object getReply(ResponseEntity<?> httpResponse)

mapHeaders

protected HttpHeaders mapHeaders(Message<?> message)

evaluateTypeFromExpression

@Nullable
protected Object evaluateTypeFromExpression(Message<?> requestMessage,
 @Nullable
 Expression expression,
 String property)