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For Each Component

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How to use For Each Component

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For Each Component

  1. 1. For Each Component 15-12-2015
  2. 2. Abstract • The main motto of this PPT is how to use For Each component in our applications.
  3. 3. Introduction • The Foreach scope splits a collection into elements and processes them iteratively through the processors embedded in the scope, then returns the original message to the flow.
  4. 4. Example
  5. 5. • .mflow<?xml version="1.0" encoding="UTF-8"?> • <mule xmlns:jdbc-ee="http://www.mulesoft.org/schema/mule/ee/jdbc" 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" version="EE-3.4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema- instance" xsi:schemaLocation="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://www.mulesoft.org/schema/mule/ee/jdbc http://www.mulesoft.org/schema/mule/ee/jdbc/current/mule-jdbc-ee.xsd"> • <jdbc-ee:mssql-data-source name="MS_SQL_Data_Source" user=“****" password=“****" url="jdbc:sqlserver://localhost;databaseName=test1" transactionIsolation="UNSPECIFIED" doc:name="MS SQL Data Source"/> • <jdbc-ee:connector name="Database" dataSource-ref="MS_SQL_Data_Source" validateConnections="true" queryTimeout="-1" pollingFrequency="0" doc:name="Database"/> • <flow name="Database_ComponentFlow1" doc:name="Database_ComponentFlow1"> • <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8087" path="database" doc:name="HTTP"/> • <logger message="--main flow--" level="INFO" doc:name="Logger"/> • <jdbc-ee:outbound-endpoint exchange-pattern="request-response" queryKey="select" queryTimeout="-1" connector- ref="Database" doc:name="Database"> • <jdbc-ee:query key="select" value="select * from mytable"/> • </jdbc-ee:outbound-endpoint> • <foreach collection="#[payload]" doc:name="For Each"> • <logger message="--In foreach loop" level="INFO" doc:name="Logger"/> • <logger message="--Result--#[payload]" level="INFO" doc:name="Logger"/> • </foreach> • </flow> • </mule>
  6. 6. • Output:INFO 2015-10-03 17:50:45,299 [main] org.mule.DefaultMuleContext: • ********************************************************************** • * Application: Database Component * • * OS encoding: Cp1252, Mule encoding: UTF-8 * • * * • * Agents Running: * • * Clustering Agent * • * JMX Agent * • ********************************************************************** • INFO 2015-10-03 17:50:45,300 [main] org.mule.module.launcher.MuleDeploymentService: • ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ • + Started app 'Database Component' + • ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ • INFO 2015-10-03 17:50:52,770 [[Database Component].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: - -main flow-- • INFO 2015-10-03 17:50:52,778 [[Database Component].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager: Initialising: 'Database.dispatcher.424429501'. Object is: EEJdbcMessageDispatcher • INFO 2015-10-03 17:50:52,779 [[Database Component].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager: Starting: 'Database.dispatcher.424429501'. Object is: EEJdbcMessageDispatcher • INFO 2015-10-03 17:50:53,042 [[Database Component].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: - -In foreach loop • INFO 2015-10-03 17:50:53,046 [[Database Component].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: - -Result--{subj=Hindi, marks=55, name=Ramesh, id=1} • INFO 2015-10-03 17:50:53,047 [[Database Component].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: - -In foreach loop • INFO 2015-10-03 17:50:53,049 [[Database Component].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: - -Result--{subj=English, marks=65, name=Mahesh, id=2} • INFO 2015-10-03 17:50:53,050 [[Database Component].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: - -In foreach loop • INFO 2015-10-03 17:50:53,052 [[Database Component].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: - -Result--{subj=science, marks=75, name=Pavan, id=3} • INFO 2015-10-03 17:50:53,053 [[Database Component].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: - -In foreach loop • INFO 2015-10-03 17:50:53,056 [[Database Component].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: - -Result--{subj=social, marks=45, name=Siva, id=4}
  7. 7. • Flow of execution: 1. URL to trigger the service from browser http://localhost:8087/foreach 2. Database component connects to the specific database, executes the select query and prints the result (one by one) using for each component
  8. 8. References • https://docs.mulesoft.com/mule-user- guide/v/3.7/foreach

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