First Successful in Mule

  First Successful in Mule






Here we are using choice flow control in mule 3 in Anypoint studio 6.2
First successful is one of the flow control components in Mule which iterates through message processors until one succeeds.
The First Successful message processor iterates through its list of child message processors, routing a received message to each of them in order until one processes the message successfully. If none succeed, an exception is thrown.
Defining success and failure:
  • If the child message processor throws an exception, this is a failure.
  • Otherwise:
    • If the child message processor returns a message that contains an exception payload, this is a failure.
    • If the child message processor returns a message that does not contain an exception payload, this is a success.
    • If the child message processor does not return a message (e.g. is a one-way connector), this is a success.
    • If the child message processor does not return a message (e.g. is a one-way connector), this is a success.
Here is the flow of First Successful scope

Basically here we are passing payload from postman by POST request.In flow Object to String converter converts payload from object form to string form and there are two Set payload components are connected with First Successful router. In first payload component that is payload123 its output is set to #[payload123] which produces error so control moves to second payload which is perfectly set to #[payload]. So, second Set payload component prints the given input message.

Payload123 component setting :


path : /first

url : http://localhost:8085/api/first
method : POST

Postman input & output :




XML project code :


<?xml version="1.0" encoding="UTF-8"?> <mule xmlns:db="http://www.mulesoft.org/schema/mule/db" xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation" xmlns:spring="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.mulesoft.org/schema/mule/db http://www.mulesoft.org/schema/mule/db/current/mule-db.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd"> <http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8085" basePath="/api" doc:name="HTTP Listener Configuration"/> <flow name="testfirstsucessfulFlow"> <http:listener config-ref="HTTP_Listener_Configuration" path="/first" doc:name="HTTP"/> <object-to-string-transformer doc:name="Object to String"/> <first-successful doc:name="First Successful"> <set-payload value="#[payload123]" doc:name="payload123"/> <set-payload doc:name="Set Payload" value="#[payload]"/> </first-successful> </flow> </mule>



Please go through below tutorials:


Mule 4 Tutorials

DEPLOY TO CLOUDHUB C4E CLIENT ID ENFORCEMENT CUSTOM POLICY RABBIT MQ INTEGRATION
XML TO JSON WEBSERVICE CONSUMER VM CONNECTOR VALIDATION UNTIL SUCCESSFUL
SUB FLOW SET & REMOVE VARIABLE TRANSACTION ID SCATTER GATHER ROUND ROBIN
CONSUME REST WEBSERVICE CRUD OPERATIONS PARSE TEMPLATE OBJECT TO JSON LOAD STATIC RESOURCE
JSON TO XML INVOKE IDEMPOTENT FILTER FOR EACH FLAT TO JSON
FIXWIDTH TO JSON FIRST SUCCESSFUL FILE OPERATIONS EXECUTE ERROR HANDLING
EMAIL FUNCTIONALITY DYNAMIC EVALUATE CUSTOM BUSINESS EVENT CSV TO JSON COPYBOOK TO JSON
CHOICE ASYNC

Widely used Connectors in Mule 3

CMIS JETTY VM CONNECTOR SALESFORCE POP3
JMS TCP/IP WEBSERVICE CONSUMER QUARTZ MONGO DB
FILE CONNECTOR DATABASE CONNECTOR


Widely used Scopes in Mule 3

SUB FLOW REQUEST REPLY PROCESSOR CHAIN FOR EACH CACHE
ASYNC TCP/IP COMPOSITE SOURCE POLL UNTIL SUCCESSFUL
TRANSACTIONAL FLOW

Widely used Components in Mule 3

EXPRESSION CXF SCRIPT RUBY PYTHON
JAVASCRIPT JAVA INVOKE CUSTOM BUSINESS EVENT GROOVY
ECHO LOGGER


Widely used Transformers in Mule 3

MONGO DB XSLT TRANSFORMER REFERENCE SCRIPT RUBY
PYTHON MESSAGE PROPERTIES JAVA TRANSFORMER GZIP COMPRESS/UNCOMPRESS GROOVY
EXPRESSION DOM TO XML STRING VALIDATION COMBINE COLLECTIONS BYTE ARRAY TO STRING
ATTACHMENT TRANSFORMER FILE TO STRING XML TO DOM APPEND STRING JAVASCRIPT
JSON TO JAVA COPYBOOK TO JSON MAP TO JSON JSON TO XML FLATFILE TO JSON
FIXWIDTH TO JSON CSV TO JSON


Widely used Filters in Mule 3

WILDCARD SCHEMA VALIDATION REGEX PAYLOAD OR
NOT MESSAGE PROPERTY MESSAGE IDEMPOTENT FILTER REFERNCE
EXPRESSION EXCEPTION CUSTOM AND


Exception Strategy in Mule 3

REFERENCE EXCEPTION STRATEGY CUSTOM EXCEPTION STRATEGY CHOICE EXCEPTION STRATEGY CATCH EXCEPTION STRATEGY GLOBAL EXCEPTION STRATEGY


Flow Control in Mule 3

CHOICE COLLECTION AGGREGATOR COLLECTION SPLITTER CUSTOM AGGREGATOR FIRST SUCCESSFUL
MESSAGE CHUNK AGGREGATOR MESSAGE CHUNK SPLITTER RESEQUENCER ROUND ROBIN SOAP ROUTER