Create or update user API

The PutUserRequest class is used to create or update a user in the Native Realm. There are 3 different factory methods for creating a request.

char[] password = new char[]{'t', 'e', 's', 't', '-', 'u','s','e','r','-','p', 'a', 's', 's', 'w', 'o', 'r', 'd'};
User user = new User("example", Collections.singletonList("superuser"));
PutUserRequest request = PutUserRequest.withPassword(user, password, true, RefreshPolicy.NONE);

SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBKDF2withHMACSHA512");
PBEKeySpec keySpec = new PBEKeySpec(password, salt, 10000, 256);
final byte[] pbkdfEncoded = secretKeyFactory.generateSecret(keySpec).getEncoded();
char[] passwordHash = ("{PBKDF2}10000$" + Base64.getEncoder().encodeToString(salt)
    + "$" + Base64.getEncoder().encodeToString(pbkdfEncoded)).toCharArray();

PutUserRequest request = PutUserRequest.withPasswordHash(user, passwordHash, true, RefreshPolicy.NONE);

PutUserRequest request = PutUserRequest.updateUser(user, true, RefreshPolicy.NONE);

When executing a PutUserRequest in the following manner, the client waits for the PutUserResponse to be returned before continuing with code execution:

PutUserResponse response = client.security().putUser(request, RequestOptions.DEFAULT);

Synchronous calls may throw an IOException in case of either failing to parse the REST response in the high-level REST client, the request times out or similar cases where there is no response coming back from the server.

In cases where the server returns a 4xx or 5xx error code, the high-level client tries to parse the response body error details instead and then throws a generic ElasticsearchException and adds the original ResponseException as a suppressed exception to it.

Executing a PutUserRequest can also be done in an asynchronous fashion so that the client can return directly. Users need to specify how the response or potential failures will be handled by passing the request and a listener to the asynchronous put-user method:

client.security().putUserAsync(request, RequestOptions.DEFAULT, listener); 

The asynchronous method does not block and returns immediately. Once it is completed the ActionListener is called back using the onResponse method if the execution successfully completed or using the onFailure method if it failed. Failure scenarios and expected exceptions are the same as in the synchronous execution case.

A typical listener for put-user looks like:

ActionListener<PutUserResponse> listener = new ActionListener<PutUserResponse>() {
    @Override
    public void onResponse(PutUserResponse response) {
        
    }

    @Override
    public void onFailure(Exception e) {
        
    }
};

The returned PutUserResponse contains a single field, created. This field serves as an indication if a user was created or if an existing entry was updated.

boolean isCreated = response.isCreated();