How to use the Batch Client API in OData V4

Construction of OData Client

ODataClient odata = ODataClientFactory.getClient();
odata.getConfiguration().setDefaultPubFormat(ContentType.APPLICATION_JSON);

Construction of a client entity and create request

ClientObjectFactory factory = getClient().getObjectFactory();
final ClientEntity entity = factory.newEntity("OData.Demo.Manufacturer");
entity.getProperties().add(factory.newPrimitiveProperty("Name", factory.newPrimitiveValueBuilder().buildString("MyCarManufacturer")));

final URI targetURI = getClient().newURIBuilder(serviceUrl).appendEntitySetSegment("Manufacturers").build();
final ODataEntityCreateRequest<ClientEntity> createRequest = getClient().getCUDRequestFactory().getEntityCreateRequest(targetURI, entity);

Add a create request to a changeset

BatchManager payloadManager = getClient().getBatchRequestFactory().getBatchRequest(serviceUrl).payloadManager();
final ODataChangeset changeset = payloadManager.addChangeset();

changeset.addRequest(createRequest);

Construction of a query request

final URI targetURI = getClient().newURIBuilder(serviceUrl).appendEntitySetSegment("Manufacturers").appendKeySegment(1).build();
final URI uri = isRelative ? URI.create(<ServiceUri>).relativize(targetURI) : targetURI;

ODataEntityRequest<ClientEntity> queryReq = getClient().getRetrieveRequestFactory().getEntityRequest(uri);
queryReq.setAccept(ContentType.APPLICATION_JSON);

Add query request to payloadManager

payload.addRequest(queryReq);

Fetch the batch response

final ODataBatchResponse response = payload.getResponse();

final Iterator<ODataBatchResponseItem> responseBodyIter = response.getBody();
final ODataBatchResponseItem changeSetResponse = responseBodyIter.next();

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