---
title: "Register the application with Adyen"
url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/register-the-application-with-the-adyen-payments-platform-jni"
source_url: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/register-the-application-with-the-adyen-payments-platform-jni.md"
canonical: "https://docs.adyen.com/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/register-the-application-with-the-adyen-payments-platform-jni"
last_modified: "2019-05-21T12:04:00+02:00"
language: "en"
---

# Register the application with Adyen

[View source](/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/register-the-application-with-the-adyen-payments-platform-jni.md)

## Class

| Name          | Description                                                                                                                         |
| ------------- | ----------------------------------------------------------------------------------------------------------------------------------- |
| `MerchantPos` | Extends `AdyenPos`. Class used to implement all functions that do not involve the PED. Implement the `MerchantPos` object yourself. |

## Method

| Name          | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| ------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `registerPos` | Authenticates and authorizes a POS application with the Adyen payments platform. Do this before processing transactions using a POS.This method returns an immediate response of type `LibraryResult`. Check if this result is "OK", before continuing the operation. If the `LibraryResult` value is not "OK", the system will not return the related callback with the asynchronous result. See [here](/point-of-sale/classic-library-deprecation/classic-library-integrations/java-native-interface-integration/key-steps-jni/process-a-basic-transaction-jni/handle-and-extract-data-from-callbacks-jni) for more on extracting data from an event or callback. |

## registerPosRequest Parameter

| Name                 | Description                                                                                                                                                                                                         |
| -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `registerPosRequest` | Signature of the `registerPos` method. One parameter object used to hold all the attributes. Use a builder pattern to create a `registerPosRequest` object and use it as parameter for  `MerchantPos.registerPos()` |

## registerPosRequest Attributes

| Name                  | Type   | Required                                                                                    | Description                                                                                                                                               |
| --------------------- | ------ | ------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `merchantAccountCode` | String | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | The merchant account name                                                                                                                                 |
| `user`                | String | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | The username of your API credential. In the Adyen Customer Area, go to **Developers** > **API credentials** to create a new credential.                   |
| `password`            | String | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | Basic authentication password for your API credential. In the Adyen Customer Area, go to **Developers** > **API credentials** to generate a new password. |
| `posId`               | String | ![-white\_check\_mark-](/user/data/smileys/emoji/white_check_mark.png "-white_check_mark-") | The unique POS ID.                                                                                                                                        |

## Callback

| Name                  | Description                                |
| --------------------- | ------------------------------------------ |
| `registerPosCallback` | Returns the result of registering the POS. |

## Callback Response Attribute

| Name      | Description                                                                                           |
| --------- | ----------------------------------------------------------------------------------------------------- |
| `PosInfo` | Contains the PosInfo object, which includes the PSP configuration as maintained in the Customer Area. |