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<label for=m-endocsv27userexamplescontext-check><a href=/en/docs/v2.7/user/examples/context/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplescontext><span>Context</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesattachment-li><input type=checkbox id=m-endocsv27userexamplesattachment-check>
<label for=m-endocsv27userexamplesattachment-check><a href=/en/docs/v2.7/user/examples/attachment/ title="Implicit parameters" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesattachment><span>Attachment</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesasync-call-li><input type=checkbox id=m-endocsv27userexamplesasync-call-check>
<label for=m-endocsv27userexamplesasync-call-check><a href=/en/docs/v2.7/user/examples/async-call/ title="Asynchronous Call" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesasync-call><span>Async Call</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesasync-execute-on-provider-li><input type=checkbox id=m-endocsv27userexamplesasync-execute-on-provider-check>
<label for=m-endocsv27userexamplesasync-execute-on-provider-check><a href=/en/docs/v2.7/user/examples/async-execute-on-provider/ title="Asynchronous Execution" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesasync-execute-on-provider><span>Async Execution</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexampleslocal-call-li><input type=checkbox id=m-endocsv27userexampleslocal-call-check>
<label for=m-endocsv27userexampleslocal-call-check><a href=/en/docs/v2.7/user/examples/local-call/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexampleslocal-call><span>Local Call</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplescallback-parameter-li><input type=checkbox id=m-endocsv27userexamplescallback-parameter-check>
<label for=m-endocsv27userexamplescallback-parameter-check><a href=/en/docs/v2.7/user/examples/callback-parameter/ title="Callback parameter" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplescallback-parameter><span>Callback</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesevents-notify-li><input type=checkbox id=m-endocsv27userexamplesevents-notify-check>
<label for=m-endocsv27userexamplesevents-notify-check><a href=/en/docs/v2.7/user/examples/events-notify/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesevents-notify><span>Event Notification</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexampleslocal-stub-li><input type=checkbox id=m-endocsv27userexampleslocal-stub-check>
<label for=m-endocsv27userexampleslocal-stub-check><a href=/en/docs/v2.7/user/examples/local-stub/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexampleslocal-stub><span>Local Stub</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexampleslocal-mock-li><input type=checkbox id=m-endocsv27userexampleslocal-mock-check>
<label for=m-endocsv27userexampleslocal-mock-check><a href=/en/docs/v2.7/user/examples/local-mock/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexampleslocal-mock><span>Local Mock</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesdelay-publish-li><input type=checkbox id=m-endocsv27userexamplesdelay-publish-check>
<label for=m-endocsv27userexamplesdelay-publish-check><a href=/en/docs/v2.7/user/examples/delay-publish/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesdelay-publish><span>Delay Publish</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesconcurrency-control-li><input type=checkbox id=m-endocsv27userexamplesconcurrency-control-check>
<label for=m-endocsv27userexamplesconcurrency-control-check><a href=/en/docs/v2.7/user/examples/concurrency-control/ title="Concurrency Control" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesconcurrency-control><span>Concurrency</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesconfig-connections-li><input type=checkbox id=m-endocsv27userexamplesconfig-connections-check>
<label for=m-endocsv27userexamplesconfig-connections-check><a href=/en/docs/v2.7/user/examples/config-connections/ title="Config connections" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesconfig-connections><span>Connection</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexampleslazy-connect-li><input type=checkbox id=m-endocsv27userexampleslazy-connect-check>
<label for=m-endocsv27userexampleslazy-connect-check><a href=/en/docs/v2.7/user/examples/lazy-connect/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexampleslazy-connect><span>Lazy Connect</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesstickiness-li><input type=checkbox id=m-endocsv27userexamplesstickiness-check>
<label for=m-endocsv27userexamplesstickiness-check><a href=/en/docs/v2.7/user/examples/stickiness/ title="Stickiness Connection" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesstickiness><span>Stickiness</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplestoken-authorization-li><input type=checkbox id=m-endocsv27userexamplestoken-authorization-check>
<label for=m-endocsv27userexamplestoken-authorization-check><a href=/en/docs/v2.7/user/examples/token-authorization/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplestoken-authorization><span>Token Authorization</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesrouting-rule-li><input type=checkbox id=m-endocsv27userexamplesrouting-rule-check>
<label for=m-endocsv27userexamplesrouting-rule-check><a href=/en/docs/v2.7/user/examples/routing-rule/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesrouting-rule><span>Routing Rule</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesconfig-rule-li><input type=checkbox id=m-endocsv27userexamplesconfig-rule-check>
<label for=m-endocsv27userexamplesconfig-rule-check><a href=/en/docs/v2.7/user/examples/config-rule/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesconfig-rule><span>Configure rule</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesservice-downgrade-li><input type=checkbox id=m-endocsv27userexamplesservice-downgrade-check>
<label for=m-endocsv27userexamplesservice-downgrade-check><a href=/en/docs/v2.7/user/examples/service-downgrade/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesservice-downgrade><span>Service Downgrade</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesgraceful-shutdown-li><input type=checkbox id=m-endocsv27userexamplesgraceful-shutdown-check>
<label for=m-endocsv27userexamplesgraceful-shutdown-check><a href=/en/docs/v2.7/user/examples/graceful-shutdown/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesgraceful-shutdown><span>Graceful Shutdown</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexampleshostname-binding-li><input type=checkbox id=m-endocsv27userexampleshostname-binding-check>
<label for=m-endocsv27userexampleshostname-binding-check><a href=/en/docs/v2.7/user/examples/hostname-binding/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexampleshostname-binding><span>Hostname Binding</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexampleslogger-strategy-li><input type=checkbox id=m-endocsv27userexampleslogger-strategy-check>
<label for=m-endocsv27userexampleslogger-strategy-check><a href=/en/docs/v2.7/user/examples/logger-strategy/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexampleslogger-strategy><span>Logger Strategy</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesaccesslog-li><input type=checkbox id=m-endocsv27userexamplesaccesslog-check>
<label for=m-endocsv27userexamplesaccesslog-check><a href=/en/docs/v2.7/user/examples/accesslog/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesaccesslog><span>Access Log</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesservice-container-li><input type=checkbox id=m-endocsv27userexamplesservice-container-check>
<label for=m-endocsv27userexamplesservice-container-check><a href=/en/docs/v2.7/user/examples/service-container/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesservice-container><span>Service Container</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesreference-config-cache-li><input type=checkbox id=m-endocsv27userexamplesreference-config-cache-check>
<label for=m-endocsv27userexamplesreference-config-cache-check><a href=/en/docs/v2.7/user/examples/reference-config-cache/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesreference-config-cache><span>ReferenceConfig Cache</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesregistry-only-li><input type=checkbox id=m-endocsv27userexamplesregistry-only-check>
<label for=m-endocsv27userexamplesregistry-only-check><a href=/en/docs/v2.7/user/examples/registry-only/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesregistry-only><span>Register Only</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesdistributed-transaction-li><input type=checkbox id=m-endocsv27userexamplesdistributed-transaction-check>
<label for=m-endocsv27userexamplesdistributed-transaction-check><a href=/en/docs/v2.7/user/examples/distributed-transaction/ title="Distributed transaction" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesdistributed-transaction><span>Transaction</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesdump-li><input type=checkbox id=m-endocsv27userexamplesdump-check>
<label for=m-endocsv27userexamplesdump-check><a href=/en/docs/v2.7/user/examples/dump/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesdump><span>Thread Dump</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userexamplesnetty4-li><input type=checkbox id=m-endocsv27userexamplesnetty4-check>
<label for=m-endocsv27userexamplesnetty4-check><a href=/en/docs/v2.7/user/examples/netty4/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userexamplesnetty4><span>Netty4</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27userreferences-li><input type=checkbox id=m-endocsv27userreferences-check>
<label for=m-endocsv27userreferences-check><a href=/en/docs/v2.7/user/references/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27userreferences><span>References</span></a></label><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27userreferencesxml-li><input type=checkbox id=m-endocsv27userreferencesxml-check>
<label for=m-endocsv27userreferencesxml-check><a href=/en/docs/v2.7/user/references/xml/ title="Schema Configuration Reference" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27userreferencesxml><span>XML</span></a></label><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-application-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-application-check>
<label for=m-endocsv27userreferencesxmldubbo-application-check><a href=/en/docs/v2.7/user/references/xml/dubbo-application/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-application><span>dubbo:application</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-argument-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-argument-check>
<label for=m-endocsv27userreferencesxmldubbo-argument-check><a href=/en/docs/v2.7/user/references/xml/dubbo-argument/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-argument><span>dubbo:argument</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-config-center-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-config-center-check>
<label for=m-endocsv27userreferencesxmldubbo-config-center-check><a href=/en/docs/v2.7/user/references/xml/dubbo-config-center/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-config-center><span>dubbo:config-center</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-consumer-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-consumer-check>
<label for=m-endocsv27userreferencesxmldubbo-consumer-check><a href=/en/docs/v2.7/user/references/xml/dubbo-consumer/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-consumer><span>dubbo:consumer</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-method-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-method-check>
<label for=m-endocsv27userreferencesxmldubbo-method-check><a href=/en/docs/v2.7/user/references/xml/dubbo-method/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-method><span>dubbo:method</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-module-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-module-check>
<label for=m-endocsv27userreferencesxmldubbo-module-check><a href=/en/docs/v2.7/user/references/xml/dubbo-module/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-module><span>dubbo:module</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-monitor-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-monitor-check>
<label for=m-endocsv27userreferencesxmldubbo-monitor-check><a href=/en/docs/v2.7/user/references/xml/dubbo-monitor/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-monitor><span>dubbo:monitor</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-parameter-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-parameter-check>
<label for=m-endocsv27userreferencesxmldubbo-parameter-check><a href=/en/docs/v2.7/user/references/xml/dubbo-parameter/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-parameter><span>dubbo:parameter</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-protocol-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-protocol-check>
<label for=m-endocsv27userreferencesxmldubbo-protocol-check><a href=/en/docs/v2.7/user/references/xml/dubbo-protocol/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-protocol><span>dubbo:protocol</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-provider-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-provider-check>
<label for=m-endocsv27userreferencesxmldubbo-provider-check><a href=/en/docs/v2.7/user/references/xml/dubbo-provider/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-provider><span>dubbo:provider</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-reference-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-reference-check>
<label for=m-endocsv27userreferencesxmldubbo-reference-check><a href=/en/docs/v2.7/user/references/xml/dubbo-reference/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-reference><span>dubbo:reference</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-registry-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-registry-check>
<label for=m-endocsv27userreferencesxmldubbo-registry-check><a href=/en/docs/v2.7/user/references/xml/dubbo-registry/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-registry><span>dubbo:registry</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesxmldubbo-service-li><input type=checkbox id=m-endocsv27userreferencesxmldubbo-service-check>
<label for=m-endocsv27userreferencesxmldubbo-service-check><a href=/en/docs/v2.7/user/references/xml/dubbo-service/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesxmldubbo-service><span>dubbo:service</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27userreferencesprotocol-li><input type=checkbox id=m-endocsv27userreferencesprotocol-check>
<label for=m-endocsv27userreferencesprotocol-check><a href=/en/docs/v2.7/user/references/protocol/ title="Protocol References" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27userreferencesprotocol><span>Protocol</span></a></label><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesprotocoldubbo-li><input type=checkbox id=m-endocsv27userreferencesprotocoldubbo-check>
<label for=m-endocsv27userreferencesprotocoldubbo-check><a href=/en/docs/v2.7/user/references/protocol/dubbo/ title="dubbo protocol" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesprotocoldubbo><span>dubbo://</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesprotocolrest-li><input type=checkbox id=m-endocsv27userreferencesprotocolrest-check>
<label for=m-endocsv27userreferencesprotocolrest-check><a href=/en/docs/v2.7/user/references/protocol/rest/ title="rest protocol" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesprotocolrest><span>rest://</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesprotocolhttp-li><input type=checkbox id=m-endocsv27userreferencesprotocolhttp-check>
<label for=m-endocsv27userreferencesprotocolhttp-check><a href=/en/docs/v2.7/user/references/protocol/http/ title="http protocol" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesprotocolhttp><span>http://</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesprotocolhessian-li><input type=checkbox id=m-endocsv27userreferencesprotocolhessian-check>
<label for=m-endocsv27userreferencesprotocolhessian-check><a href=/en/docs/v2.7/user/references/protocol/hessian/ title="hessian protocol" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesprotocolhessian><span>hessian://</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesprotocolredis-li><input type=checkbox id=m-endocsv27userreferencesprotocolredis-check>
<label for=m-endocsv27userreferencesprotocolredis-check><a href=/en/docs/v2.7/user/references/protocol/redis/ title="redis protocol" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesprotocolredis><span>redis://</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesprotocolthrift-li><input type=checkbox id=m-endocsv27userreferencesprotocolthrift-check>
<label for=m-endocsv27userreferencesprotocolthrift-check><a href=/en/docs/v2.7/user/references/protocol/thrift/ title="thrift protocol" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesprotocolthrift><span>thrift://</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesprotocolmemcached-li><input type=checkbox id=m-endocsv27userreferencesprotocolmemcached-check>
<label for=m-endocsv27userreferencesprotocolmemcached-check><a href=/en/docs/v2.7/user/references/protocol/memcached/ title="memcached protocol" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesprotocolmemcached><span>memcached://</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesprotocolrmi-li><input type=checkbox id=m-endocsv27userreferencesprotocolrmi-check>
<label for=m-endocsv27userreferencesprotocolrmi-check><a href=/en/docs/v2.7/user/references/protocol/rmi/ title="rmi protocol" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesprotocolrmi><span>rmi://</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesprotocolwebservice-li><input type=checkbox id=m-endocsv27userreferencesprotocolwebservice-check>
<label for=m-endocsv27userreferencesprotocolwebservice-check><a href=/en/docs/v2.7/user/references/protocol/webservice/ title="webservice protocol" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesprotocolwebservice><span>webservice://</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27userreferencesregistry-li><input type=checkbox id=m-endocsv27userreferencesregistry-check>
<label for=m-endocsv27userreferencesregistry-check><a href=/en/docs/v2.7/user/references/registry/ title="Registry Server References" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27userreferencesregistry><span>Registry Server</span></a></label><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesregistrynacos-li><input type=checkbox id=m-endocsv27userreferencesregistrynacos-check>
<label for=m-endocsv27userreferencesregistrynacos-check><a href=/en/docs/v2.7/user/references/registry/nacos/ title="Nacos Registry Center" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesregistrynacos><span>Nacos</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesregistryzookeeper-li><input type=checkbox id=m-endocsv27userreferencesregistryzookeeper-check>
<label for=m-endocsv27userreferencesregistryzookeeper-check><a href=/en/docs/v2.7/user/references/registry/zookeeper/ title="Zookeeper Registry Server" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesregistryzookeeper><span>Zookeeper</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesregistrymulticast-li><input type=checkbox id=m-endocsv27userreferencesregistrymulticast-check>
<label for=m-endocsv27userreferencesregistrymulticast-check><a href=/en/docs/v2.7/user/references/registry/multicast/ title="Multicast Registry" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesregistrymulticast><span>Multicast</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesregistryredis-li><input type=checkbox id=m-endocsv27userreferencesregistryredis-check>
<label for=m-endocsv27userreferencesregistryredis-check><a href=/en/docs/v2.7/user/references/registry/redis/ title="Redis Registry Server" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesregistryredis><span>Redis</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesregistrysimple-li><input type=checkbox id=m-endocsv27userreferencesregistrysimple-check>
<label for=m-endocsv27userreferencesregistrysimple-check><a href=/en/docs/v2.7/user/references/registry/simple/ title="Simple Registry Server" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesregistrysimple><span>Simple</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesmetadata-li><input type=checkbox id=m-endocsv27userreferencesmetadata-check>
<label for=m-endocsv27userreferencesmetadata-check><a href=/en/docs/v2.7/user/references/metadata/ title="Metadata Reference" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesmetadata><span>Metadata</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesapi-li><input type=checkbox id=m-endocsv27userreferencesapi-check>
<label for=m-endocsv27userreferencesapi-check><a href=/en/docs/v2.7/user/references/api/ title="API Reference" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesapi><span>API</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesqos-li><input type=checkbox id=m-endocsv27userreferencesqos-check>
<label for=m-endocsv27userreferencesqos-check><a href=/en/docs/v2.7/user/references/qos/ title="Qos Command Usage " class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesqos><span>Qos</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencestelnet-li><input type=checkbox id=m-endocsv27userreferencestelnet-check>
<label for=m-endocsv27userreferencestelnet-check><a href=/en/docs/v2.7/user/references/telnet/ title="Telnet Command Reference" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencestelnet><span>Telnet</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userreferencesmaven-li><input type=checkbox id=m-endocsv27userreferencesmaven-check>
<label for=m-endocsv27userreferencesmaven-check><a href=/en/docs/v2.7/user/references/maven/ title="Maven Plugin Reference" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userreferencesmaven><span>Maven</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userbest-practice-li><input type=checkbox id=m-endocsv27userbest-practice-check>
<label for=m-endocsv27userbest-practice-check><a href=/en/docs/v2.7/user/best-practice/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userbest-practice><span>Best practice</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userrecommend-li><input type=checkbox id=m-endocsv27userrecommend-check>
<label for=m-endocsv27userrecommend-check><a href=/en/docs/v2.7/user/recommend/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userrecommend><span>Recommended usage</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27usercapacity-plan-li><input type=checkbox id=m-endocsv27usercapacity-plan-check>
<label for=m-endocsv27usercapacity-plan-check><a href=/en/docs/v2.7/user/capacity-plan/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27usercapacity-plan><span>Capacity plan</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userperf-test-li><input type=checkbox id=m-endocsv27userperf-test-check>
<label for=m-endocsv27userperf-test-check><a href=/en/docs/v2.7/user/perf-test/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userperf-test><span>Performance</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27usercoveragence-li><input type=checkbox id=m-endocsv27usercoveragence-check>
<label for=m-endocsv27usercoveragence-check><a href=/en/docs/v2.7/user/coveragence/ title="Test coverage report" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27usercoveragence><span>Test coverage</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userbenchmark-tool-li><input type=checkbox id=m-endocsv27userbenchmark-tool-check>
<label for=m-endocsv27userbenchmark-tool-check><a href=/en/docs/v2.7/user/benchmark-tool/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userbenchmark-tool><span>Benchmark Suite</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userrest-li><input type=checkbox id=m-endocsv27userrest-check>
<label for=m-endocsv27userrest-check><a href=/en/docs/v2.7/user/rest/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userrest><span>REST support</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27usersimple-monitor-li><input type=checkbox id=m-endocsv27usersimple-monitor-check>
<label for=m-endocsv27usersimple-monitor-check><a href=/en/docs/v2.7/user/simple-monitor/ title="Simple Monitor" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27usersimple-monitor><span>Simple monitor</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27userlanguages-li><input type=checkbox id=m-endocsv27userlanguages-check>
<label for=m-endocsv27userlanguages-check><a href=/en/docs/v2.7/user/languages/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27userlanguages><span>Other Languages</span></a></label><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27userlanguageserlang-li><input type=checkbox id=m-endocsv27userlanguageserlang-check>
<label for=m-endocsv27userlanguageserlang-check><a href=/en/docs/v2.7/user/languages/erlang/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27userlanguageserlang><span>Erlang</span></a></label><ul class="ul-5 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userlanguageserlangquick-start-li><input type=checkbox id=m-endocsv27userlanguageserlangquick-start-check>
<label for=m-endocsv27userlanguageserlangquick-start-check><a href=/en/docs/v2.7/user/languages/erlang/quick-start/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userlanguageserlangquick-start><span>Quick Start</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userlanguageserlangreference-li><input type=checkbox id=m-endocsv27userlanguageserlangreference-check>
<label for=m-endocsv27userlanguageserlangreference-check><a href=/en/docs/v2.7/user/languages/erlang/reference/ title="Consumer Configuration" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userlanguageserlangreference><span>Consumer</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userlanguageserlangservice-li><input type=checkbox id=m-endocsv27userlanguageserlangservice-check>
<label for=m-endocsv27userlanguageserlangservice-check><a href=/en/docs/v2.7/user/languages/erlang/service/ title="Provider Configuration" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userlanguageserlangservice><span>Provider</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27userlanguageserlangserialization-li><input type=checkbox id=m-endocsv27userlanguageserlangserialization-check>
<label for=m-endocsv27userlanguageserlangserialization-check><a href=/en/docs/v2.7/user/languages/erlang/serialization/ title="Protocol Configuration" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27userlanguageserlangserialization><span>Protocol</span></a></label></li></ul></li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27dev-li><input type=checkbox id=m-endocsv27dev-check>
<label for=m-endocsv27dev-check><a href=/en/docs/v2.7/dev/ title="Dubbo Developer Guide" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27dev><span>Developer</span></a></label><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devbuild-li><input type=checkbox id=m-endocsv27devbuild-check>
<label for=m-endocsv27devbuild-check><a href=/en/docs/v2.7/dev/build/ title="Source Code Build" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devbuild><span>Build</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devdesign-li><input type=checkbox id=m-endocsv27devdesign-check>
<label for=m-endocsv27devdesign-check><a href=/en/docs/v2.7/dev/design/ title="Framework Design" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devdesign><span>Design</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devspi-li><input type=checkbox id=m-endocsv27devspi-check>
<label for=m-endocsv27devspi-check><a href=/en/docs/v2.7/dev/spi/ title="SPI Loading" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devspi><span>SPI</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplementation-li><input type=checkbox id=m-endocsv27devimplementation-check>
<label for=m-endocsv27devimplementation-check><a href=/en/docs/v2.7/dev/implementation/ title="Implementation details" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplementation><span>Implementation</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27devprincipals-li><input type=checkbox id=m-endocsv27devprincipals-check>
<label for=m-endocsv27devprincipals-check><a href=/en/docs/v2.7/dev/principals/ title="Dubbo Design Principals" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27devprincipals><span>Design Principals</span></a></label><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devprincipalscode-detail-li><input type=checkbox id=m-endocsv27devprincipalscode-detail-check>
<label for=m-endocsv27devprincipalscode-detail-check><a href=/en/docs/v2.7/dev/principals/code-detail/ title="The Devil Is In The Details" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devprincipalscode-detail><span>Details</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devprincipalsconfiguration-li><input type=checkbox id=m-endocsv27devprincipalsconfiguration-check>
<label for=m-endocsv27devprincipalsconfiguration-check><a href=/en/docs/v2.7/dev/principals/configuration/ title="The Configuration Design" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devprincipalsconfiguration><span>Configuration</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devprincipalsdummy-li><input type=checkbox id=m-endocsv27devprincipalsdummy-check>
<label for=m-endocsv27devprincipalsdummy-check><a href=/en/docs/v2.7/dev/principals/dummy/ title=' "Fool-proof" Design' class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devprincipalsdummy><span>Fool-proof</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devprincipalsexpansibility-li><input type=checkbox id=m-endocsv27devprincipalsexpansibility-check>
<label for=m-endocsv27devprincipalsexpansibility-check><a href=/en/docs/v2.7/dev/principals/expansibility/ title="Talk About Expansion Of Extension And Incremental Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devprincipalsexpansibility><span>Extensibility</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devprincipalsextension-li><input type=checkbox id=m-endocsv27devprincipalsextension-check>
<label for=m-endocsv27devprincipalsextension-check><a href=/en/docs/v2.7/dev/principals/extension/ title="Extension Points To Reconstruct" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devprincipalsextension><span>Extension</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devprincipalsgeneral-knowledge-li><input type=checkbox id=m-endocsv27devprincipalsgeneral-knowledge-check>
<label for=m-endocsv27devprincipalsgeneral-knowledge-check><a href=/en/docs/v2.7/dev/principals/general-knowledge/ title="Some In The Design Of The Basic Common Sense" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devprincipalsgeneral-knowledge><span>General Rule</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devprincipalsrobustness-li><input type=checkbox id=m-endocsv27devprincipalsrobustness-check>
<label for=m-endocsv27devprincipalsrobustness-check><a href=/en/docs/v2.7/dev/principals/robustness/ title="The Robustness Of The Design Implementation" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devprincipalsrobustness><span>Robustness</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27devimpls-li><input type=checkbox id=m-endocsv27devimpls-check>
<label for=m-endocsv27devimpls-check><a href=/en/docs/v2.7/dev/impls/ title="SPI Extension Implementations" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27devimpls><span>SPI Impls</span></a></label><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsprotocol-li><input type=checkbox id=m-endocsv27devimplsprotocol-check>
<label for=m-endocsv27devimplsprotocol-check><a href=/en/docs/v2.7/dev/impls/protocol/ title="Protocol Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsprotocol><span>Protocol</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsfilter-li><input type=checkbox id=m-endocsv27devimplsfilter-check>
<label for=m-endocsv27devimplsfilter-check><a href=/en/docs/v2.7/dev/impls/filter/ title="Filter Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsfilter><span>Filter</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsinvoker-listener-li><input type=checkbox id=m-endocsv27devimplsinvoker-listener-check>
<label for=m-endocsv27devimplsinvoker-listener-check><a href=/en/docs/v2.7/dev/impls/invoker-listener/ title="InvokerListener Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsinvoker-listener><span>InvokerListener</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsexporter-listener-li><input type=checkbox id=m-endocsv27devimplsexporter-listener-check>
<label for=m-endocsv27devimplsexporter-listener-check><a href=/en/docs/v2.7/dev/impls/exporter-listener/ title="ExporterListener Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsexporter-listener><span>ExporterListener</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplscluster-li><input type=checkbox id=m-endocsv27devimplscluster-check>
<label for=m-endocsv27devimplscluster-check><a href=/en/docs/v2.7/dev/impls/cluster/ title="Cluster Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplscluster><span>Cluster</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsrouter-li><input type=checkbox id=m-endocsv27devimplsrouter-check>
<label for=m-endocsv27devimplsrouter-check><a href=/en/docs/v2.7/dev/impls/router/ title="Router Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsrouter><span>Router</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsload-balance-li><input type=checkbox id=m-endocsv27devimplsload-balance-check>
<label for=m-endocsv27devimplsload-balance-check><a href=/en/docs/v2.7/dev/impls/load-balance/ title="LoadBalance Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsload-balance><span>LoadBalance</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsmerger-li><input type=checkbox id=m-endocsv27devimplsmerger-check>
<label for=m-endocsv27devimplsmerger-check><a href=/en/docs/v2.7/dev/impls/merger/ title="Merger Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsmerger><span>Merger</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsregistry-li><input type=checkbox id=m-endocsv27devimplsregistry-check>
<label for=m-endocsv27devimplsregistry-check><a href=/en/docs/v2.7/dev/impls/registry/ title="Registry Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsregistry><span>Registry</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsmonitor-li><input type=checkbox id=m-endocsv27devimplsmonitor-check>
<label for=m-endocsv27devimplsmonitor-check><a href=/en/docs/v2.7/dev/impls/monitor/ title="Monitor Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsmonitor><span>Monitor</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsextension-factory-li><input type=checkbox id=m-endocsv27devimplsextension-factory-check>
<label for=m-endocsv27devimplsextension-factory-check><a href=/en/docs/v2.7/dev/impls/extension-factory/ title="ExtensionFactory Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsextension-factory><span>ExtensionFactory</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsproxy-factory-li><input type=checkbox id=m-endocsv27devimplsproxy-factory-check>
<label for=m-endocsv27devimplsproxy-factory-check><a href=/en/docs/v2.7/dev/impls/proxy-factory/ title="ProxyFactory Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsproxy-factory><span>ProxyFactory</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplscompiler-li><input type=checkbox id=m-endocsv27devimplscompiler-check>
<label for=m-endocsv27devimplscompiler-check><a href=/en/docs/v2.7/dev/impls/compiler/ title="Compiler Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplscompiler><span>Compiler</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsconfig-center-li><input type=checkbox id=m-endocsv27devimplsconfig-center-check>
<label for=m-endocsv27devimplsconfig-center-check><a href=/en/docs/v2.7/dev/impls/config-center/ title="Dubbo Configuration Center Extensions" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsconfig-center><span>Config Center</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsdispatcher-li><input type=checkbox id=m-endocsv27devimplsdispatcher-check>
<label for=m-endocsv27devimplsdispatcher-check><a href=/en/docs/v2.7/dev/impls/dispatcher/ title="Dispatcher Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsdispatcher><span>Dispatcher</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsthreadpool-li><input type=checkbox id=m-endocsv27devimplsthreadpool-check>
<label for=m-endocsv27devimplsthreadpool-check><a href=/en/docs/v2.7/dev/impls/threadpool/ title="ThreadPool Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsthreadpool><span>ThreadPool</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsserialize-li><input type=checkbox id=m-endocsv27devimplsserialize-check>
<label for=m-endocsv27devimplsserialize-check><a href=/en/docs/v2.7/dev/impls/serialize/ title="Serialization Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsserialize><span>Serialization</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsremoting-li><input type=checkbox id=m-endocsv27devimplsremoting-check>
<label for=m-endocsv27devimplsremoting-check><a href=/en/docs/v2.7/dev/impls/remoting/ title="Transporter Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsremoting><span>Transporter</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsexchanger-li><input type=checkbox id=m-endocsv27devimplsexchanger-check>
<label for=m-endocsv27devimplsexchanger-check><a href=/en/docs/v2.7/dev/impls/exchanger/ title="Exchanger Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsexchanger><span>Exchanger</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsnetworker-li><input type=checkbox id=m-endocsv27devimplsnetworker-check>
<label for=m-endocsv27devimplsnetworker-check><a href=/en/docs/v2.7/dev/impls/networker/ title="Networker Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsnetworker><span>Networker</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplstelnet-handler-li><input type=checkbox id=m-endocsv27devimplstelnet-handler-check>
<label for=m-endocsv27devimplstelnet-handler-check><a href=/en/docs/v2.7/dev/impls/telnet-handler/ title="TelnetHandler Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplstelnet-handler><span>TelnetHandler</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsstatus-checker-li><input type=checkbox id=m-endocsv27devimplsstatus-checker-check>
<label for=m-endocsv27devimplsstatus-checker-check><a href=/en/docs/v2.7/dev/impls/status-checker/ title="StatusChecker Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsstatus-checker><span>StatusChecker</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplscontainer-li><input type=checkbox id=m-endocsv27devimplscontainer-check>
<label for=m-endocsv27devimplscontainer-check><a href=/en/docs/v2.7/dev/impls/container/ title="Container Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplscontainer><span>Container</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplspage-li><input type=checkbox id=m-endocsv27devimplspage-check>
<label for=m-endocsv27devimplspage-check><a href=/en/docs/v2.7/dev/impls/page/ title="PageHandler Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplspage><span>PageHandler</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplscache-li><input type=checkbox id=m-endocsv27devimplscache-check>
<label for=m-endocsv27devimplscache-check><a href=/en/docs/v2.7/dev/impls/cache/ title="Cache Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplscache><span>Cache</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplsvalidation-li><input type=checkbox id=m-endocsv27devimplsvalidation-check>
<label for=m-endocsv27devimplsvalidation-check><a href=/en/docs/v2.7/dev/impls/validation/ title="Validation Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplsvalidation><span>Validation</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devimplslogger-adapter-li><input type=checkbox id=m-endocsv27devimplslogger-adapter-check>
<label for=m-endocsv27devimplslogger-adapter-check><a href=/en/docs/v2.7/dev/impls/logger-adapter/ title="LoggerAdapter Extension" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devimplslogger-adapter><span>LoggerAdapter</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devcontract-li><input type=checkbox id=m-endocsv27devcontract-check>
<label for=m-endocsv27devcontract-check><a href=/en/docs/v2.7/dev/contract/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devcontract><span>Public Agreement</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devrelease-li><input type=checkbox id=m-endocsv27devrelease-check>
<label for=m-endocsv27devrelease-check><a href=/en/docs/v2.7/dev/release/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devrelease><span>Versions</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devchecklist-li><input type=checkbox id=m-endocsv27devchecklist-check>
<label for=m-endocsv27devchecklist-check><a href=/en/docs/v2.7/dev/checklist/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devchecklist><span>Checklist</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devcode-smell-li><input type=checkbox id=m-endocsv27devcode-smell-check>
<label for=m-endocsv27devcode-smell-check><a href=/en/docs/v2.7/dev/code-smell/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devcode-smell><span>Bad Smell</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devcoding-li><input type=checkbox id=m-endocsv27devcoding-check>
<label for=m-endocsv27devcoding-check><a href=/en/docs/v2.7/dev/coding/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devcoding><span>Coding Convention</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27devtck-li><input type=checkbox id=m-endocsv27devtck-check>
<label for=m-endocsv27devtck-check><a href=/en/docs/v2.7/dev/tck/ title="Compatibility Test" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27devtck><span>TCK</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27admin-li><input type=checkbox id=m-endocsv27admin-check>
<label for=m-endocsv27admin-check><a href=/en/docs/v2.7/admin/ title="Admin Guide" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27admin><span>Admin</span></a></label><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27adminops-li><input type=checkbox id=m-endocsv27adminops-check>
<label for=m-endocsv27adminops-check><a href=/en/docs/v2.7/admin/ops/ title="Dubbo Admin Guide" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27adminops><span>Dubbo Admin</span></a></label><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27adminopsfunctions-li><input type=checkbox id=m-endocsv27adminopsfunctions-check>
<label for=m-endocsv27adminopsfunctions-check><a href=/en/docs/v2.7/admin/ops/functions/ title="Dubbo Admin Functions" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27adminopsfunctions><span>Functions</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27adminopsintroduction-li><input type=checkbox id=m-endocsv27adminopsintroduction-check>
<label for=m-endocsv27adminopsintroduction-check><a href=/en/docs/v2.7/admin/ops/introduction/ title="Dubbo Admin Introductions" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27adminopsintroduction><span>Introductions</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27adminopssearch-li><input type=checkbox id=m-endocsv27adminopssearch-check>
<label for=m-endocsv27adminopssearch-check><a href=/en/docs/v2.7/admin/ops/search/ title="Service Search And Service Detail" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27adminopssearch><span>Search</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27adminopstest-li><input type=checkbox id=m-endocsv27adminopstest-check>
<label for=m-endocsv27adminopstest-check><a href=/en/docs/v2.7/admin/ops/test/ title="Service Test" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27adminopstest><span>Test</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27adminopsapidocs-li><input type=checkbox id=m-endocsv27adminopsapidocs-check>
<label for=m-endocsv27adminopsapidocs-check><a href=/en/docs/v2.7/admin/ops/apidocs/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27adminopsapidocs><span>API Docs&amp;Test</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27adminopsgovernance-li><input type=checkbox id=m-endocsv27adminopsgovernance-check>
<label for=m-endocsv27adminopsgovernance-check><a href=/en/docs/v2.7/admin/ops/governance/ title="Service Governance And Configuration Management" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27adminopsgovernance><span>Governance</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27adminopspinpoint-li><input type=checkbox id=m-endocsv27adminopspinpoint-check>
<label for=m-endocsv27adminopspinpoint-check><a href=/en/docs/v2.7/admin/ops/pinpoint/ title="Tracking with Pinpoint" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27adminopspinpoint><span>Pinpoint</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27adminopsskywalking-li><input type=checkbox id=m-endocsv27adminopsskywalking-check>
<label for=m-endocsv27adminopsskywalking-check><a href=/en/docs/v2.7/admin/ops/skywalking/ title="Tracing Dubbo service with Apache Skywalking" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27adminopsskywalking><span>Skywalking</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv27admininstall-li><input type=checkbox id=m-endocsv27admininstall-check>
<label for=m-endocsv27admininstall-check><a href=/en/docs/v2.7/admin/install/ title="Dubbo Installation Guide" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv27admininstall><span>Installation</span></a></label><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27admininstalladmin-console-li><input type=checkbox id=m-endocsv27admininstalladmin-console-check>
<label for=m-endocsv27admininstalladmin-console-check><a href=/en/docs/v2.7/admin/install/admin-console/ title="Install Admin Console" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27admininstalladmin-console><span>Admin Console</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27admininstallprovider-demo-li><input type=checkbox id=m-endocsv27admininstallprovider-demo-check>
<label for=m-endocsv27admininstallprovider-demo-check><a href=/en/docs/v2.7/admin/install/provider-demo/ title="Install Demo Provider" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27admininstallprovider-demo><span>Demo Provider</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27admininstallconsumer-demo-li><input type=checkbox id=m-endocsv27admininstallconsumer-demo-check>
<label for=m-endocsv27admininstallconsumer-demo-check><a href=/en/docs/v2.7/admin/install/consumer-demo/ title="Install Demo Consumer" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27admininstallconsumer-demo><span>Demo Consumer</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27admininstallzookeeper-li><input type=checkbox id=m-endocsv27admininstallzookeeper-check>
<label for=m-endocsv27admininstallzookeeper-check><a href=/en/docs/v2.7/admin/install/zookeeper/ title="install Zookeeper Configuration Center" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27admininstallzookeeper><span>Config Center</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27admininstallredis-li><input type=checkbox id=m-endocsv27admininstallredis-check>
<label for=m-endocsv27admininstallredis-check><a href=/en/docs/v2.7/admin/install/redis/ title="Install Redis Register Center" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27admininstallredis><span>Register Center</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv27admininstallmonitor-center-li><input type=checkbox id=m-endocsv27admininstallmonitor-center-check>
<label for=m-endocsv27admininstallmonitor-center-check><a href=/en/docs/v2.7/admin/install/monitor-center/ title="Install Simple monitor center" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv27admininstallmonitor-center><span>Monitor Center</span></a></label></li></ul></li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv30-li><input type=checkbox id=m-endocsv30-check>
<label for=m-endocsv30-check><a href=/en/docs/v3.0/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv30><span>Dubbo 3.0</span></a></label><ul class="ul-2 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv30loadbalance-li><input type=checkbox id=m-endocsv30loadbalance-check>
<label for=m-endocsv30loadbalance-check><a href=/en/docs/v3.0/loadbalance/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv30loadbalance><span>Load Balance</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv30whats-new-in-dubbo3-li><input type=checkbox id=m-endocsv30whats-new-in-dubbo3-check>
<label for=m-endocsv30whats-new-in-dubbo3-check><a href=/en/docs/v3.0/whats-new-in-dubbo3/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv30whats-new-in-dubbo3><span>What's new in Apache Dubbo 3.x?</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv30references-li><input type=checkbox id=m-endocsv30references-check>
<label for=m-endocsv30references-check><a href=/en/docs/v3.0/references/ title="Function Reference Manual" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv30references><span>Reference</span></a></label><ul class="ul-3 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv30referenceslifecycle-li><input type=checkbox id=m-endocsv30referenceslifecycle-check>
<label for=m-endocsv30referenceslifecycle-check><a href=/en/docs/v3.0/references/lifecycle/ title="Align with Kubernetes Lifecycle" class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsv30referenceslifecycle><span>Probe</span></a></label><ul class="ul-4 foldable"><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv30referenceslifecyclebrief-li><input type=checkbox id=m-endocsv30referenceslifecyclebrief-check>
<label for=m-endocsv30referenceslifecyclebrief-check><a href=/en/docs/v3.0/references/lifecycle/brief/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv30referenceslifecyclebrief><span>Brief</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv30referenceslifecycleliveness-li><input type=checkbox id=m-endocsv30referenceslifecycleliveness-check>
<label for=m-endocsv30referenceslifecycleliveness-check><a href=/en/docs/v3.0/references/lifecycle/liveness/ title="Liveness Probe" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv30referenceslifecycleliveness><span>Liveness</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv30referenceslifecyclereadiness-li><input type=checkbox id=m-endocsv30referenceslifecyclereadiness-check>
<label for=m-endocsv30referenceslifecyclereadiness-check><a href=/en/docs/v3.0/references/lifecycle/readiness/ title="Readiness Probe" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv30referenceslifecyclereadiness><span>Readiness</span></a></label></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-endocsv30referenceslifecyclestartup-li><input type=checkbox id=m-endocsv30referenceslifecyclestartup-check>
<label for=m-endocsv30referenceslifecyclestartup-check><a href=/en/docs/v3.0/references/lifecycle/startup/ title="Startup Probe" class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-endocsv30referenceslifecyclestartup><span>Startup</span></a></label></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-endocsv30referencesgraalvm-li><input type=checkbox id=m-endocsv30referencesgraalvm-check>
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<label for=m-endocsfaq-check><a href=/en/docs/faq/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-endocsfaq><span>FAQ - Frequently Asked Questions</span></a></label></li></ul></li></ul></nav></div></div><main class="col-12 col-md-9 col-xl-8 pl-md-5" role=main><nav aria-label=breadcrumb class=td-breadcrumbs><ol class=breadcrumb><li class=breadcrumb-item><a href=https://cn.dubbo.apache.org/en/docs/>Documentation</a></li><li class=breadcrumb-item><a href=https://cn.dubbo.apache.org/en/docs/v2.7/>Dubbo 2.7</a></li><li class=breadcrumb-item><a href=https://cn.dubbo.apache.org/en/docs/v2.7/dev/>Developer</a></li><li class="breadcrumb-item active" aria-current=page><a href=https://cn.dubbo.apache.org/en/docs/v2.7/dev/design/ aria-disabled=true class="btn-link disabled">Design</a></li></ol></nav><div class=td-content><h1>Framework Design</h1><div class=lead>Dubbo frame design</div><header class=article-meta></header><h2 id=overall-design>Overall design</h2><p><img src=/imgs/dev/dubbo-framework.jpg alt=/dev-guide/images/dubbo-framework.jpg></p><p>Image description:</p><ul><li>Left area with light blue background shows service consumer interfaces, Right area with light green background shows service provider interfaces, center area shows both side interfaces.</li><li>The image is divided into 10 layers from the bottom to the top, and the layers are one-way dependence. The black arrow on the right represents the dependency between layers, and each layer can be stripped from the upper layer to be reused, the Service and Config layers are API, and the other layers are SPI.</li><li>Green boxes are extension interfaces, blue boxes are implementation classes, image only shows implementation class of associated layers.</li><li>The blue dashed line is the initialization process, which is assembly chain when starting, red line for the method call process, which is calling chain when running, purple triangle arrow is inherited, can treat subclass as the same node of parent class, text of lines are the method invocation.</li></ul><h2 id=layer-description>Layer description</h2><ul><li><strong>config layer</strong>: external config interface, <code>ServiceConfig</code> and <code>ReferenceConfig</code> is the center of the layer, you can directly initialize config class, also can generate config class by spring.</li><li><strong>proxy layer</strong>: transparent proxy of service interface, generate client Stub of service and server Skeletion of service, <code>ServiceProxy</code> is the center, extension interface is <code>ProxyFactory</code>.</li><li><strong>registry layer</strong>: encapsulation of service registry and discovery, service URL is the center, extension interfaces are <code>RegistryFactory</code>, <code>Registry</code> and <code>RegistryService</code>.</li><li><strong>cluster layer</strong>: encapsulation of cluster of muliple providers and load balance, and bridging registration center, <code>Invoker</code> is the center, extension interfaces are <code>Cluster</code>, <code>Directory</code>, <code>Router</code>, <code>LoadBalance</code>.</li><li><strong>monitor layer</strong>: monitor of RPC call times and call execute time, <code>Statistics</code> is the center, extension interface are <code>MonitorFactory</code>, <code>Monitor</code>, <code>MonitorService</code></li><li><strong>protocol layer</strong>: encapsulation of RPC, <code>Invocation</code> and <code>Result</code> are the center, extension interfaces are <code>Protocol</code>, <code>Invoker</code>, <code>Exporter</code></li><li><strong>exchange layer</strong>: encapsulation of request and response, synchronous transfer asynchronous, <code>Request</code> and <code>Response</code> are the center, extension interfaces are <code>Exchanger</code>, <code>ExchangeChannel</code>, <code>ExchangeClient</code>, <code>ExchangeServer</code></li><li><strong>transport layer</strong>: abstraction of mina and netty, <code>Message</code> is the center, extension interfaces are <code>Channel</code>, <code>Transporter</code>, <code>Client</code>, <code>Server</code>, <code>Codec</code></li><li><strong>serialize layer</strong>: reusable tools, extension interfaces are <code>Serialization</code>, <code>ObjectInput</code>, <code>ObjectOutput</code>, <code>ThreadPool</code></li></ul><h2 id=relationship-description>Relationship description</h2><ul><li>In RPC, Protocol is the core layer, it means that you can complete RPC calling by Protocol + Invoker + Exporter, then filter at the main process of Invoker.</li><li>Consumer and Provider are abstraction concepts, just want you have a more intuitive understanding of which classes belong to the client and server side, the reason not use Client and Server is that Dubbo uses Provider, Consumer, Registry, Monitor divide logical topology node in many scenes, keep the concept of unity.</li><li>Cluster is external concept, the purpose of Cluster is that make various Invoker disguise to one Invoker, so that we just pay attention to the Invoker in Protocol layer, adding Cluster or removing Cluster will not affect other layers, because we don&rsquo;t need Cluster when only have one provider.</li><li>The Proxy layer encapsulates the transparent proxy for all interfaces, and in other layers with Invoker as the center, turn Invoker into interface, or turn interface implementation into Invoker by Proxy only when exposuring to user. RPC still work even removing Proxy layer, but not so transparent, making remote service calling don&rsquo;t look like local service calling.</li><li>Remoting is the implemetation of Dubbo protocols, you can remove Remoting if choosing RMI. The Remoting is divided into Transport layer and Exchange layer, Transport layer is responsible for one-way message transmission, it&rsquo;s abstraction of Mina, Netty, Grizzly, it also can extend UDP transmission. The Exchange layer encapsulates the Request-Response semantics over the transport layer.</li><li>Actually Registry and Monitor are not at the same layer, they are independent nodes, draw them together by layer just for global view.</li></ul><h2 id=modules-packaging>Modules packaging</h2><p><img src=/imgs/dev/dubbo-modules.jpg alt=/dev-guide/images/dubbo-modules.jpg></p><p>Modules description:</p><ul><li><strong>dubbo-common module</strong>: includes Util classes and common modules.</li><li><strong>dubbo-remoting module</strong>: is Dubbo protocol implementation, no need to use this module if using RMI for RPC.</li><li><strong>dubbo-rpc module</strong>: abstraction of various protocols, and dynamic proxy, only one to one call, not concerned with the management of cluster.</li><li><strong>dubbo-cluster module</strong>: disguise many service providers as one provider, including load balancing, fault tolerance, routing, etc. the address list of clusters can be either static or send by registry.</li><li><strong>dubbo-registry module</strong>: Based on the cluster of registry send address and the abstraction of various registry centers.</li><li><strong>dubbo-monitor module</strong>: statistics of service call times, call time, call chain tracked services.</li><li><strong>dubbo-config module</strong>: is Dubbo external API, users use Dubbo by Config, hide Dubbo details.</li><li><strong>dubbo-container module</strong>: is a Standlone container, just use Main method to load Spring, because usually service no need Tomcat/JBoss features.</li></ul><p>Package dividing according to the layer structure, and the difference with layer dividing:</p><ul><li>container is service container, for service running deployment, not showed in the image.</li><li>protocol layer and proxy layer are placed in RPC module, they are the core of RPC module, you can use these 2 layers complete RPC call when only have 1 provider.</li><li>transport layer and exchange layer are placed in remoting module, for RPC call base comminucation.</li><li>serialize layer is placed in common module, for reuse.</li></ul><h2 id=dependence-relationship>Dependence relationship</h2><p><img src=/imgs/dev/dubbo-relation.jpg alt=/dev-guide/images/dubbo-relation.jpg></p><p>Image description:</p><ul><li>The boxes in image, Protocol, Cluster, Proxy, Service, Container, Registry, Monitor represent layer or module, the blues mean interactive with business, the greens mean only internal interactive with Dubbo.</li><li>The backgroud boxes in image, Consumer, Provider, Registry, Monitor represent deployment logical topology node.</li><li>The blue dashed line in the image is called for initialization, the red dashed line is called asynchronously for runtime, and the red line is called synchronously for runtime.</li><li>The image only includes RPC layer, don&rsquo;t includes Remoting layer, the whole Remoting hides in Protocol layer.</li></ul><h2 id=call-chain>Call chain</h2><p>Expand the red call chain of the overall design map:</p><p><img src=/imgs/dev/dubbo-extension.jpg alt=/dev-guide/images/dubbo-extension.jpg></p><h2 id=expose-service-sequence>Expose service sequence</h2><p>Expand the initialization chain of service provider exposes service which at the left of the overall design map, the sequence diagram shows below:</p><p><img src=/imgs/dev/dubbo-export.jpg alt=/dev-guide/images/dubbo-export.jpg></p><h2 id=reference-service-sequence>Reference service sequence</h2><p>Expand the initialization chain of service consumer references service which at the right of the overall design map, the sequence diagram shows below:</p><p><img src=/imgs/dev/dubbo-refer.jpg alt=/dev-guide/images/dubbo-refer.jpg></p><h2 id=domain-model>Domain model</h2><p>The core domain models of Dubbo:</p><ul><li>Protocol is service domain, it is the main function entrance of Invoker exposure and reference, it is responsible for the life cycle management of Invoker.</li><li>Invoker is entity domain, it is the core model of Dubbo, all the other models are disturbed, or converted to it, it represents an executable, you can call it by calling invoke, it can be a local implementation, a remote implementation, or a cluster implementation.</li><li>Invocation is session domain, it holds variables in the calling process, such as the method name, the parameters, and so on.</li></ul><h2 id=base-design-principle>Base design principle</h2><ul><li>Use Microkernel + Plugin design pattern,Microkernel only responsible for assembly Plugin, the functions of Dubbo are implemented by extension points, it means that all functions of Dubbo can be replaced by self defined extension by user.</li><li>Use URL to be the startdard format of config information, all extension points transfer config information by URL.</li></ul><p>More design principles refer to: <a href=../principals>Framework design principle</a></p><div id=pre-footer><h2>Feedback</h2><p class=feedback--prompt>Was this page helpful?</p><button class="btn 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