Data Mapper
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This document discusses using a DataMapper transformer in Mule applications. DataMapper transforms data from one format to another. The example shows a flow that uses a JDBC connector to execute a SQL query, transforms the results using a DataMapper configuration, and logs the output. Upon receiving an HTTP request, it connects to a database, runs a select statement, maps the results to a new format defined in a graph, and prints the transformed payload.
![.mflow
<?xml version="1.0" encoding="UTF-8"?>
<mule xmlns:jdbc-ee="http://www.mulesoft.org/schema/mule/ee/jdbc" xmlns:data-
mapper="http://www.mulesoft.org/schema/mule/ee/data-mapper" 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
http://www.mulesoft.org/schema/mule/ee/data-mapper http://www.mulesoft.org/schema/mule/ee/data-mapper/current/mule-data-
mapper.xsd">
<spring:beans>
<spring:bean id="Bean1" name="Bean" class="org.enhydra.jdbc.standard.StandardDataSource">
<spring:property name="driverName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>
<spring:property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=test1;user=****;password=****;"/>
</spring:bean>
</spring:beans>
<jdbc-ee:connector name="Database" dataSource-ref="Bean1" validateConnections="true" queryTimeout="-1" pollingFrequency="0"
doc:name="Database"/>
<data-mapper:config name="new_mapping_grf" transformationGraphPath="new_mapping.grf" doc:name="new_mapping_grf"/>
<flow name="DataMapper_POCFlow1" doc:name="DataMapper_POCFlow1">
<http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8065" path="datamapper" doc:name="HTTP"/>
<logger message="--entered" 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>
<data-mapper:transform config-ref="new_mapping_grf" doc:name="DataMapper"/>
<logger message="---#[payload]" level="INFO" doc:name="Logger"/>
</flow>
</mule>](https://image.slidesharecdn.com/datamapper-160923172427/85/Data-Mapper-5-320.jpg)
![ Output:
++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++
+ Started app 'DataMapper' +
++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++
INFO 2015-05-16 10:00:00,123
[[DataMapper_POC].connector.http.mule.default.receiver.02]
org.mule.api.processor.LoggerMessageProcessor: --entered
INFO 2015-05-16 10:00:00,123
[[DataMapper_POC].connector.http.mule.default.receiver.02]
org.mule.lifecycle.AbstractLifecycleManager: Initialising:
'Database.dispatcher.1295829687'. Object is: EEJdbcMessageDispatcher
INFO 2015-05-16 10:00:00,123
[[DataMapper_POC].connector.http.mule.default.receiver.02]
org.mule.lifecycle.AbstractLifecycleManager: Starting:
'Database.dispatcher.1295829687'. Object is: EEJdbcMessageDispatcher
INFO 2015-05-16
10:00:00,254[[DataMapper_POC].connector.http.mule.default.receiver.02]
org.mule.api.processor.LoggerMessageProcessor: ---[{id=1, name=a,
subj=Hindi, marks=34}, {id=2, name=b, subj=English, marks=33}, {id=3,
name=c, subj=science, marks=67}, {id=4, name=d, subj=social,
marks=89}]](https://image.slidesharecdn.com/datamapper-160923172427/85/Data-Mapper-6-320.jpg)
Data Mapper
- 2. The main motto of this PPT is How to use DataMapper Transformer in our applications.
- 3. DataMapper takes data in a specific format and outputs the same data in the format of your choice.
- 5. .mflow <?xml version="1.0" encoding="UTF-8"?> <mule xmlns:jdbc-ee="http://www.mulesoft.org/schema/mule/ee/jdbc" xmlns:data- mapper="http://www.mulesoft.org/schema/mule/ee/data-mapper" 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 http://www.mulesoft.org/schema/mule/ee/data-mapper http://www.mulesoft.org/schema/mule/ee/data-mapper/current/mule-data- mapper.xsd"> <spring:beans> <spring:bean id="Bean1" name="Bean" class="org.enhydra.jdbc.standard.StandardDataSource"> <spring:property name="driverName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/> <spring:property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=test1;user=****;password=****;"/> </spring:bean> </spring:beans> <jdbc-ee:connector name="Database" dataSource-ref="Bean1" validateConnections="true" queryTimeout="-1" pollingFrequency="0" doc:name="Database"/> <data-mapper:config name="new_mapping_grf" transformationGraphPath="new_mapping.grf" doc:name="new_mapping_grf"/> <flow name="DataMapper_POCFlow1" doc:name="DataMapper_POCFlow1"> <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8065" path="datamapper" doc:name="HTTP"/> <logger message="--entered" 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> <data-mapper:transform config-ref="new_mapping_grf" doc:name="DataMapper"/> <logger message="---#[payload]" level="INFO" doc:name="Logger"/> </flow> </mule>
- 6. Output: ++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++ + Started app 'DataMapper' + ++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++ INFO 2015-05-16 10:00:00,123 [[DataMapper_POC].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: --entered INFO 2015-05-16 10:00:00,123 [[DataMapper_POC].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager: Initialising: 'Database.dispatcher.1295829687'. Object is: EEJdbcMessageDispatcher INFO 2015-05-16 10:00:00,123 [[DataMapper_POC].connector.http.mule.default.receiver.02] org.mule.lifecycle.AbstractLifecycleManager: Starting: 'Database.dispatcher.1295829687'. Object is: EEJdbcMessageDispatcher INFO 2015-05-16 10:00:00,254[[DataMapper_POC].connector.http.mule.default.receiver.02] org.mule.api.processor.LoggerMessageProcessor: ---[{id=1, name=a, subj=Hindi, marks=34}, {id=2, name=b, subj=English, marks=33}, {id=3, name=c, subj=science, marks=67}, {id=4, name=d, subj=social, marks=89}]
- 7. Flow of execution: 1. URL to trigger the service from browser http://localhost:8065/datamapper 2. Database component connects to the specific database, executes the select query, maps the results using DataMapper and prints the result in console