apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/service/ItemSetService.java/ItemSetService/createCommit
class ItemSetService:  private void createCommit(String appId, String clusterName, String namespaceName, String configChangeContent,
                            String operator) {

    Commit commit = new Commit();
    commit.setAppId(appId);
    commit.setClusterName(clusterName);
    commit.setNamespaceName(namespaceName);
    commit.setChangeSets(configChangeContent);
    commit.setDataChangeCreatedBy(operator);
    commit.setDataChangeLastModifiedBy(operator);
    commitService.save(commit);
  }