org.springframework.integration.http.outbound

Class AbstractHttpRequestExecutingMessageHandler

java.lang.Object

org.springframework.integration.context.IntegrationObjectSupport

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, NamedComponent, BaseHandlerMetrics, ConfigurableMetricsAware<AbstractMessageHandlerMetrics>, IntegrationManagement, IntegrationStatsManagement, MessageHandlerMetrics, 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 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 and Description
AbstractHttpRequestExecutingMessageHandler(Expression uriExpression)

Method Summary

Modifier and Type	Method and Description
protected void	doInit()
protected Object	evaluateTypeFromExpression(Message<?> requestMessage, Expression expression, String property)
protected abstract Object	exchange(java.util.function.Supplier<URI> uriSupplier, HttpMethod httpMethod, HttpEntity<?> httpRequest, Object expectedResponseType, Message<?> requestMessage)
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	setEncodeUri(boolean encodeUri) Specify whether the real URI should be encoded after uriVariables expanding and before send request via RestTemplate.
void	setExpectedResponseType(Class<?> expectedResponseType) Specify the expected response type for the REST request otherwise the default response type is ResponseEntity and will be returned as a payload of the reply Message.
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	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, shouldCopyRequestHeaders, shouldSplitOutput, updateNotPropagatedHeaders

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

configureMetrics, destroy, getActiveCount, getActiveCountLong, getComponentType, getDuration, getErrorCount, getErrorCountLong, getHandleCount, getHandleCountLong, getManagedName, getManagedType, getMaxDuration, getMeanDuration, getMetricsCaptor, getMinDuration, getOrder, getOverrides, getStandardDeviationDuration, handleMessage, isCountsEnabled, isLoggingEnabled, isStatsEnabled, onComplete, onError, onNext, onSubscribe, registerMetricsCaptor, reset, setCountsEnabled, setLoggingEnabled, setManagedName, setManagedType, setOrder, setShouldTrack, setStatsEnabled

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 org.springframework.integration.support.management.MessageHandlerMetrics

errorCount, handleCount

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

getBeanName, getComponentName

Methods inherited from interface reactor.core.CoreSubscriber

currentContext

Constructor Detail

AbstractHttpRequestExecutingMessageHandler

public AbstractHttpRequestExecutingMessageHandler(Expression uriExpression)

Method Detail

setEncodeUri

public void setEncodeUri(boolean encodeUri)

Specify whether the real URI should be encoded after uriVariables expanding and before send request via RestTemplate. The default value is true.

Parameters:

encodeUri - true if the URI should be encoded.

See Also:

UriComponentsBuilder

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 the default response type is ResponseEntity and will be returned as a payload of the reply Message. 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.

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.

doInit

protected void doInit()

Overrides:

doInit in class AbstractReplyProducingMessageHandler

handleRequestMessage

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

protected abstract Object exchange(java.util.function.Supplier<URI> uriSupplier,
                                   HttpMethod httpMethod,
                                   HttpEntity<?> httpRequest,
                                   Object expectedResponseType,
                                   Message<?> requestMessage)

getReply

protected Object getReply(ResponseEntity<?> httpResponse)

mapHeaders

protected HttpHeaders mapHeaders(Message<?> message)

evaluateTypeFromExpression

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