Package io.microsphere.spring.webmvc.handler

Class ReversedProxyHandlerMapping

java.lang.Object

org.springframework.context.support.ApplicationObjectSupport

org.springframework.web.context.support.WebApplicationObjectSupport

org.springframework.web.servlet.handler.AbstractHandlerMapping

io.microsphere.spring.webmvc.handler.ReversedProxyHandlerMapping

All Implemented Interfaces:

java.util.EventListener, org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanNameAware, org.springframework.context.ApplicationContextAware, org.springframework.context.ApplicationListener<WebEndpointMappingsReadyEvent>, org.springframework.core.Ordered, org.springframework.web.context.ServletContextAware, org.springframework.web.servlet.HandlerMapping

public class ReversedProxyHandlerMapping
extends org.springframework.web.servlet.handler.AbstractHandlerMapping
implements org.springframework.context.ApplicationListener<WebEndpointMappingsReadyEvent>

The performance optimization HandlerMapping to process the forwarded request from the reversed proxy web server, e.g, Spring Cloud Netflix Zuul, Spring Cloud Gateway or others. The request must have a header named "microsphere_wem_id", which is a string presenting the id of endpoint, used to locate the actual endpoint easily, such as HandlerMethod, HandlerFunction and Controller.

As a result, ReversedProxyHandlerMapping has the higher precedence than others, which ensures that it prioritizes getting the handler and avoid the duplication that was executed by the reversed proxy. As regards the details of endpoint, it's recommended to read the JavaDoc of WebEndpointMapping.getEndpoint().

For now, ReversedProxyHandlerMapping only supports to get the handlers from RequestMappingHandlerMapping.

Since:

1.0.0

Author:

Mercy

See Also:

WebEndpointMapping, AbstractUrlHandlerMapping, AbstractHandlerMethodMapping, HandlerMetadataWebEndpointMappingFactory, RequestMappingMetadataWebEndpointMappingFactory, RequestMappingInfoHandlerMapping

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_ORDER

Fields inherited from class org.springframework.web.servlet.handler.AbstractHandlerMapping

mappingsLogger

Fields inherited from interface org.springframework.web.servlet.HandlerMapping

BEST_MATCHING_HANDLER_ATTRIBUTE, BEST_MATCHING_PATTERN_ATTRIBUTE, INTROSPECT_TYPE_LEVEL_MAPPING, LOOKUP_PATH, MATRIX_VARIABLES_ATTRIBUTE, PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE, PRODUCIBLE_MEDIA_TYPES_ATTRIBUTE, URI_TEMPLATE_VARIABLES_ATTRIBUTE

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

Constructors

Constructor	Description
ReversedProxyHandlerMapping()

Method Summary

Modifier and Type	Method	Description
protected org.springframework.web.servlet.HandlerExecutionChain	getHandlerExecutionChain(WebEndpointMapping webEndpointMapping, javax.servlet.http.HttpServletRequest request)
protected java.lang.Object	getHandlerInternal(javax.servlet.http.HttpServletRequest request)
void	onApplicationEvent(WebEndpointMappingsReadyEvent event)

Methods inherited from class org.springframework.web.servlet.handler.AbstractHandlerMapping

adaptInterceptor, detectMappedInterceptors, extendInterceptors, formatMappingName, getAdaptedInterceptors, getCorsConfiguration, getCorsConfigurationSource, getCorsHandlerExecutionChain, getCorsProcessor, getDefaultHandler, getHandler, getHandlerExecutionChain, getMappedInterceptors, getOrder, getPathMatcher, getPatternParser, getUrlPathHelper, hasCorsConfigurationSource, initApplicationContext, initInterceptors, initLookupPath, setAlwaysUseFullPath, setBeanName, setCorsConfigurations, setCorsConfigurationSource, setCorsProcessor, setDefaultHandler, setInterceptors, setOrder, setPathMatcher, setPatternParser, setRemoveSemicolonContent, setUrlDecode, setUrlPathHelper, usesPathPatterns

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

getServletContext, getTempDir, getWebApplicationContext, initApplicationContext, initServletContext, isContextRequired, setServletContext

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

getApplicationContext, getMessageSourceAccessor, obtainApplicationContext, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_ORDER

public static final int DEFAULT_ORDER

See Also:

Constant Field Values

Constructor Detail

ReversedProxyHandlerMapping

public ReversedProxyHandlerMapping()

Method Detail

getHandlerInternal

protected java.lang.Object getHandlerInternal(javax.servlet.http.HttpServletRequest request)
                                       throws java.lang.Exception

Specified by:

getHandlerInternal in class org.springframework.web.servlet.handler.AbstractHandlerMapping

Throws:

java.lang.Exception

getHandlerExecutionChain

@Nullable
protected org.springframework.web.servlet.HandlerExecutionChain getHandlerExecutionChain(WebEndpointMapping webEndpointMapping,
                                                                                         javax.servlet.http.HttpServletRequest request)

onApplicationEvent

public void onApplicationEvent(WebEndpointMappingsReadyEvent event)

Specified by:

onApplicationEvent in interface org.springframework.context.ApplicationListener<WebEndpointMappingsReadyEvent>