This document describes how to integrate the IDaaS SDK, initialize its configuration, and obtain an M2M client access token of the bearer type. - Identity as a Service

This topic describes how to integrate the IDaaS SDK to obtain an M2M client token.

Prerequisites

Before you begin, complete the environment preparation.

SDK initialization

The SDK initializes the IDaaS configuration by reading the configuration file during environment preparation.

IDaaSCredentialProviderFactory.init();

Important

All SDK features depend on the init() method, which you must call first. Otherwise, errors occur when obtaining an IDaaSCredentialProvider, causing service interruptions.
The SDK retrieves an access token during initialization. If the configuration is missing or incorrect, this attempt fails and throws an error, interrupting service.

Obtain an access token

Obtain an IDaaS credential provider to retrieve an access token.
- Use the parameterless constructor to obtain an IDaaS credential provider. This retrieves an access token for the scope specified in the configuration file.
```
IDaaSCredentialProvider credentialProvider = IDaaSCredentialProviderFactory.getIDaaSCredentialProvider();
```
- Use the parameterized constructor to obtain an IDaaS credential provider for a custom scope. The scope format is audience ID|permission ID, corresponding to the audience ID and permission ID of the M2M server application you want to access.
```
IDaaSCredentialProvider credentialProvider = IDaaSCredentialProviderFactory.getIDaaSCredentialProvider(scope);
```
The access token is of the bearer type. Retrieve it by calling the getBearerToken() method on the credentialProvider object.
```
String accessToken = credentialProvider.getBearerToken();
```

Code example

import com.cloud_idaas.core.factory.IDaaSCredentialProviderFactory;
import com.cloud_idaas.core.provider.IDaaSCredentialProvider;

public class sample {

  public static void main(String[] args) {
    // Initialize the IDaaS configuration from the configuration file.
    IDaaSCredentialProviderFactory.init();
        
    // Obtain a credential provider for the scope specified in the configuration file.
    IDaaSCredentialProvider credentialProvider = IDaaSCredentialProviderFactory.getIDaaSCredentialProvider();
    String accessToken = credentialProvider.getBearerToken();
        
    // Obtain a credential provider for a custom scope.
    // String scope =  "api.example.com|read:file";
    // IDaaSCredentialProvider anotherCredentialProvider = IDaaSCredentialProviderFactory.getIDaaSCredentialProvider(scope);
    // String accessToken = anotherCredentialProvider.getBearerToken();
        
    System.out.println(accessToken);
  }
}