Studio+Update+Sites4Message ProcessorsComponents.docx

Studio+Update+Sites4Message ProcessorsComponents.docx

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Studio+Update+Sites4MessageProcessorsComponents

MessageProcessors

AfterMulereceivesamessagefromaMessageSource,itusesoneormoremessageprocessorstoprocessthemessagethroughaflow.

MessageProcessorscanbecategorizedbyfunctionasfollows:

∙ComponentsareflexibletoolswhichperformbusinesslogicimplementedinJavaandotherscriptinglanguages.

∙Filtersonlyallowcertainmessagestocontinuetobeprocessedinaflow.

∙Routerscontrolmessageflowtoroute,resequence,orsplitandaggregatemessagesinaflow.

∙Scopeswrapothermessagesprocessorssoastoenablethemtoperformtogetherasagroup.

∙Transformersconvertmessagepayloadtypeanddataformattofacilitatecommunicationbetweensystems.

Browsethesectionsbelowforfurtherdetails.

∙Components

∙Filters

∙Routers

∙Scopes

∙Transformers

∙BusinessEvents

Components

ThebuildingblocksknownasComponentsfallintothreecategories:

General,Script,andWebService.

Generalcomponentsexecutewheneveramessageisreceived.ThelogicembeddedintoGeneralcomponentscannotbemodified.ComponentssuchasLogging,FlowReference,andEchofallintothiscategory.

Scriptcomponentsdonotcontainpre-packagedlogic;insteadtheyallowthedevelopertospecifythelogic（intheformofacustomscriptoraJavaclass）toaddintothecomponent.Scriptcomponentsalsoallowyouto:

∙configureinterceptors

∙addSpringbeans

∙changethevalueorreferenceofaspecificpropertywithintheassociatedclass

TheJavaComponentallowsyoutoreferenceaJavaclass.TheotherScriptcomponentssupporttheGroovy,JavaScript,PythonandRubyscriptingengines.

WebServicecomponents,asthenameimplies,enableMuletouseSOAPandRESTfulprotocolstocommunicatewithexternalWebservices.TheSOAPandRESTfulcomponentsuseCXFandJerseyservicestoconvertmessagesfromJavatoXML.WebServicecomponentsalsoallowthedevelopertoselectordefinethelogictobeinvokedbycomponent.IfusingtheRESTfulcomponentyouonlyneedtoselectaJavaclassandaddascripttothecomponent.Ontheotherhand,SOAPconfigurationrequiresyoutodefineattributesandselecttheoperationmethodusedtopublishaSOAPWebservice.AsanexampleofhowtheCXFcomponentcanbeused,aSOAPmessagecouldbesenttoaWeb-service-enabledwebsitesuchasausedcarpricedatabase,withtheparametersneededforasearch.ThesitewouldthenreturnanXML-formatteddocumentwiththeresultingdata,e.g.,prices,modelandfeatures.Thedatareturnedisthenintegrateddirectlyintoathird-partywebsiteorapplication.

ConfiguringComponents

Toconfigureacomponent,double-clickonthecomponenttoopenthePropertiesEditorintheconsole.EverycomponentintheStudiopaletteincludestwocommonfields:

DisplaynameandNotes,bothofwhichareoptionalandshouldbefamiliartoStudiousers,becausetheyarecommontovirtuallyallStudiobuildingblocks.

Beyondthetwocommonfields,mostComponentsdonotrequireextensiveconfiguration.ThefivescriptcomponentsavailablewithinStudiosupportalmostidenticalpropertypanefields.

Fordetails,seetheindividualcomponentreferencepagesonhowtouseandconfigureeachtypeofcomponent.

ComponentsAvailableinAnypointStudio

ThefollowingthreetableseachdetailoneoftheStudioComponentsub-groups:

GeneralComponents

Generalcomponentsallowyoutoenhanceaflowbyattachingfunctionalitysuchasloggingordisplayingoutput.

Components

Description

Documentation

Echo

Outputsthemessagebeingprocessedtoalogordisplay,thenpassesthemessagetothenextbuildingblockintheflow.

EchoComponentReference

FlowReference

Thisbuildingblockcallsanotherexternalflow.Thecalledflowcanbeoneoftwotypes:

Asubflow,whichinheritstheprocessingstrategyandexceptionhandlingpropertiesofthecallingflow.

Achildflow,whichsetsitsownprocessingstrategyandexceptionhandlingproperties.

IfthecalledflowisSynchronous,thecallingflowwaitsuntilthecalledflowcompletesexecution,thenresumes.IfthecalledflowisAsynchronous,thecallingflowresumesexecutionimmediately.

FlowReferenceComponentReference

Logger

Logscustomstrings,includingstringsconstructedfromembeddedexpressions.Alsoallowsspecificationoflogginglevelandcategory.

LoggerComponentReference

ScriptComponents

ScriptcomponentsfacilitateSoftwareasaService（SaaS）integrationbyprovidinglanguage-specific"shells"tomakecustom-codedbusinesslogicavailableinaMuleapplication.YoucanwritethebusinesslogicinJava,Ruby,JavaScript,Groovy,orPython.

Components

Description

Documentation

Groovy

FacilitatestheintegrationofacustomscriptbackedbytheGroovyscriptengine.

GroovyComponentReference

Java

AllowsyoutoselectaJavaclasstobe