CPI http calls from groovy

The design of the IFlows may sometimes demand we make a request in message mapping and get a value which is need for the target system.

We might go of request reply also, but we need to have content modifier (if the source has multiple values to query we might have to use iterator ) and to again if the URL is returning the value needed in XML or JSON we may have to parse again with script.

So , instead we can do everything inside the custom function where we parse the xml and call the URL and get response and replace it in xml or put it in an hashMap and set the hashMap as exchange properties for further use.

If we do not have further use we could just call the URL and replace it the custom mapping function as shown in second code snippet.

When we are trying save key,values in hash map and use during mapping. We can do the below.

Custom Function for making external http calls

CODE

import com.sap.gateway.ip.core.customdev.util.Message;
import java.util.HashMap;

def Message processData(Message message) {
def body = message.getBody(java.lang.String) as String;
def messageLog = messageLogFactory.getMessageLog(message);
def oException = message.getProperty(‘CamelExceptionCaught’);

def get = new URL(“Your URL”).openConnection();
get.setRequestProperty(‘Authorization’, ‘Basic ‘ + ‘Username:password’.bytes.encodeBase64().toString())
def getRC = get.getResponseCode();

if(getRC.equals(200)) {
messageLog.setStringProperty(“ResponsePayload-:”,getRC.toString());
}

def feed = new XmlSlurper().parseText(get.getInputStream().getText())
def uuid = feed.entry.content.properties.MarketingOfferContentUUID[0]
def hashMap = [:]
hashMap.put(OfferIdExt,uuid)

// creating the MAP in external properties

message.setProperty(“testmap”,hashMap)
return message;
}

Custom Mapping function

import com.sap.it.api.mapping.*;

//here we are getting the product-id while we are passing its bar-code.

def String GetProductID(String barcode){

def get = new URL(“your URL “+barcode,’UTF-8′)).openConnection();

get.setRequestProperty(‘Authorization’, ‘Basic ‘ + ‘testUser:Password’.bytes.encodeBase64().toString())
def getRC = get.getResponseCode();

def feed = new XmlSlurper().parseText(get.getInputStream().getText())
barcode = feed.entry.content.properties.ProductID[0]

return barcode

}

Custom Mapping function with access to value-mapping

import com.sap.it.api.mapping.*;

//here we are getting the mapped value.

def countryValue= getMappedValue(“sourceAgency”,”sourceIdentifier”, “sourceValue”, “targetAgency”, “targetIdentifier”)

def String GetProductID(String barcode){

def get = new URL(“your URL “+barcode,’UTF-8′)).openConnection();

get.setRequestProperty(‘Authorization’, ‘Basic ‘ + countryValue+barcode ‘testUser:Password’.bytes.encodeBase64().toString())
def getRC = get.getResponseCode();

def feed = new XmlSlurper().parseText(get.getInputStream().getText())

barcode = feed.entry.content.properties.ProductID[0]

//returning  appended value

return barcode

}

The above would reduce the complexity of the Iflow and could be used based on the context of our requirement. This will be handy if we are querying something on the fly during execution of iflow without adding many steps to Iflow.