---
title:  PUT /gemfire-api/v1/{region}/{key}?op=REPLACE
---

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Update (replace) data with key(s) if and only if the key(s) exists in region. The Key(s) must be present in the Region for the update to occur.

## Resource URL

``` pre
http://<hostname_or_http-service-bind-address>:<http-service-port>/gemfire-api/v1/{region}/{key}?op=REPLACE
http://<hostname_or_http-service-bind-address>:<http-service-port>/gemfire-api/v1/{region}/{key1},{key2},...{keyN}?op=REPLACE
```

## Parameters

| Parameter | Description                                                                                                                       | Example Values           |
|-----------|-----------------------------------------------------------------------------------------------------------------------------------|--------------------------|
| op        | When you specify REPLACE for this parameter, data is only updated if the specified key or keys are already present in the region. | REPLACE                  |
| @type     | Specified in the response body. Use this to declare the domain object type of the entry value.                                    | com.mycompany.ObjectName |

## Example Request

``` pre
Request Payload: application/json
PUT //gemfire-api/v1/orders/2?op=REPLACE

Accept: application/json
Content-Type: application/json
{
     "@type":  "org.apache.geode.web.rest.domain.Order",
     "purchaseOrderNo": 1121,
     "customerId": 1012,
     "description":  "Order for XYZ Corp",
     "orderDate":  "02/10/2014",
     "deliveryDate":  "02/20/2014",
     "contact":  "Jelly Bean",
     "email":  "jelly.bean@example.com",
     "phone":  "01-2048096",
     "totalPrice": 225,
     "items": [
        {
             "itemNo": 1,
             "description":  "Product-100",
             "quantity": 12,
             "unitPrice": 5,
             "totalPrice": 60
        }
    ]
}
```

## Example Success Response

``` pre
Response Payload: null

200 OK
```

## Error Codes

| Status Code               | Description                                                                                                                      |
|---------------------------|----------------------------------------------------------------------------------------------------------------------------------|
| 400 BAD REQUEST           | Returned if the supplied key is not present in the region.                                                                       |
| 404 NOT FOUND             | Returned if the region is not found.                                                                                             |
| 500 INTERNAL SERVER ERROR | Error encountered at <%=vars.product_name%> server. Check the HTTP response body for a stack trace of the exception. |