tech mahindra requirement.

 

sender --><root>1356</root> as payload: based on counter i need to call external system in SAP BTP (1356/500)% + 1 times ,i.e. 4 times, target system give only 500 records, by using skip=0, skip-500 in url suffix; i need to collect all payloads in cpi , finally gather all payloads to target system; logic in iflow i need to use, step i need to use in integration suite iflow sap;

ChatGPT said:

To implement this logic in SAP BTP Integration Suite (CPI/Cloud Integration), you can follow these steps in your iFlow to call an external system multiple times (based on payload counter) using a calculated paging mechanism (skip=0, 500, etc.), collect all responses, and finally send the combined payload to a target system.

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🔁 Scenario Example

• You receive a payload: <root>1356</root>

• External system supports pagination with a limit of 500 records per call

• You want to send (1356 / 500) + 1 = 4 calls with skip=0, skip=500, skip=1000, skip=1500

• Then gather all responses and send combined data to the final system

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✅ Step-by-Step iFlow Design in SAP CPI

1. Start with Sender Adapter (HTTPS or any)

To receive <root>1356</root>

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2. Content Modifier – Extract Counter

Use XPath to extract the counter value:

xml
${in.body}

Set a property:

Name	Type	Value
recordCount	Expression	xpath(/root)

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3. Groovy Script – Calculate Loop Count

Create a Groovy Script to calculate number of iterations and store skip values:

groovy
def Message processData(Message message) {
    def recordCount = message.getProperty("recordCount") as int
    def limit = 500
    def loopCount = (recordCount / limit).intValue() + 1

    // Create skip values as comma separated: "0,500,1000,..."
    def skipValues = (0..<loopCount).collect { it * limit }.join(",")

    message.setProperty("skipValues", skipValues)
    message.setProperty("loopCount", loopCount)
    return message
}

---

4. Splitter – Iterate Over Each Skip Value

Use General Splitter with Groovy script to loop over skip values.

Groovy to Split:

groovy
def Message processData(Message message) {
    def skipValues = message.getProperty("skipValues").split(",")
    def newPayload = "<skips>" + skipValues.collect { "<skip>${it}</skip>" }.join("") + "</skips>"
    message.setBody(newPayload)
    return message
}

Now apply XPath Splitter on /skips/skip

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5. Request Reply – Call External System

Use Request Reply with a Content Modifier before it to form URL with skip:

Set header CamelHttpQuery or set it directly in address like:

plaintext
https://api.example.com/data?skip=${property.CamelSplitIndex * 500}

or if using from skip node:

plaintext
https://api.example.com/data?skip=${in.body}

---

6. Gather Step – Collect All Responses

Use Gather Step with Aggregation Strategy:

• Aggregation Algorithm: Combine

• Enable Complete Condition → Number of Messages = ${property.loopCount}

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7. Final Target Call

After Gather, use a Content Modifier if needed to wrap or transform data, then use a Receiver Adapter (HTTP, SFTP, etc.) to send the combined payload.

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💡 Optional Enhancements

• Add Exception Subprocess for error handling

• Enable logging in Groovy scripts for debugging

• Use Enricher Pattern if you want to add metadata to each payload

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Would you like me to provide a full sample iFlow screenshot or reusable Groovy code snippets for each step?

You said:

any free website, give records based url paramters to test REST api ? give those exampels i will test ; answers in 10lines;

ChatGPT said:

Here are some free REST APIs that support pagination via URL parameters like ?page, ?limit, or ?offset – great for testing your CPI logic:

1. ReqRes (Dummy Users API)
   URL: https://reqres.in/api/users?page=2
   Pagination via ?page=1, ?page=2

2. JSONPlaceholder (Posts API)
   URL: https://jsonplaceholder.typicode.com/posts?_start=0&_limit=10
   Pagination via _start, _limit

3. DummyJSON (Products API)
   URL: https://dummyjson.com/products?limit=10&skip=20
   Pagination via ?skip=X&limit=Y

4. SWAPI (Star Wars API)
   URL: https://swapi.dev/api/people/?page=2
   Pagination via ?page

5. Open Library API
   URL: https://openlibrary.org/search.json?q=harry+potter&page=2
   Pagination via ?page