Creating a Route to use an external map

Create a Route and configure components to create and use external map variables.

1. In the Integration perspective, right-click the Route Designs node and click Create Route.
2. Enter a name, purpose, and description for your Route, then click Finish.
3. Add the following components to your design workspace and link them with Row > Route connections:
   • A cTimer
   • A cProcessor
   • A cSetBody
   • A cMap
   • A cLog
   • A second cProcessor
   Your Route looks like this:

   

4. Double-click the first cProcessor component and configure it as follows:

   Parameter	Value
   Import	import java.util.*;
   Code	Map<String, Object> externalMap = new HashMap<>(); externalMap.put("current.date",TalendDate.getCurrentDate()); Map<String, Object> executionProperties = exchange.getIn().getHeaders(); if (executionProperties==null){ executionProperties = new HashMap<>(); exchange.getIn().setHeaders(executionProperties); } executionProperties.put("org.talend.transform.externalmap", externalMap);

   This code allows you to create an external map variable named current.date that you can then use in your map.

5. Double-click the cSetBody component and configure it as follows:

   Parameter	Value
   Language	Constant
   Expression	"<orders><order><orderId>abc-6545165186</orderId><shippingDetails><lastName>Kennedy</lastName><firstName>John</firstName><street>Santa Rosa South</street><city>Columbus</city><state>New York</state></shippingDetails><items><item><id>4987601</id><price>649.99</price><quantity>1</quantity></item><item><id>8570817</id><price>99.99</price><quantity>3</quantity></item></items></order></orders>"

6. Double-click the second cProcessor component and configure it as follows:

   Parameter

   Value

   Code

   Map<String, Object> executionProperties = exchange.getIn().getHeaders(); if (executionProperties==null){ executionProperties = new HashMap<>(); exchange.getIn().setHeaders(executionProperties); } Map<String, Object> externalMap = (Map<String, Object>)executionProperties.get("org.talend.transform.externalmap"); System.out.println("Order ID: " + (String)externalMap.get("order.id")); System.out.println("Order due date: " + (String)externalMap.get("due.date"));

   This code allows you to print the order.id and due.date external map variables that you will define in your map.