Transactions SpringDataNeo4j如何选择事务类型(安慰剂或顶级)
我有一个方法可以创建一个子图,它是这样定义的:Transactions SpringDataNeo4j如何选择事务类型(安慰剂或顶级),transactions,neo4j,spring-data-neo4j,Transactions,Neo4j,Spring Data Neo4j,我有一个方法可以创建一个子图,它是这样定义的: public Post createAndLink(Appuser appuser, Post post, String linkTo) { Transaction tx = template.getGraphDatabaseService().beginTx(); Post savedPost = null; if(post != null && appuser != null){ pos
public Post createAndLink(Appuser appuser, Post post, String linkTo) {
Transaction tx = template.getGraphDatabaseService().beginTx();
Post savedPost = null;
if(post != null && appuser != null){
post.setCreatedBy(appuser);
if(post.getId() == null && post.getId() == ""){
post.setId("IND"+GenerateUUID.getUUID());
}
System.out.println(">>> Id created : "+post.getId());
//Date check
String d = post.getDate();
if(d != null && d.length() == 11 && ConversionUtils.isNumeric(d.substring(0, 4))
&& ConversionUtils.isNumeric(d.substring(5, 7)) && ConversionUtils.isNumeric(d.substring(8, 10))){
if(!ConversionUtils.isPastDate(d)){
System.out.println("Cannot save post with date after today");
return null;
}
}
System.out.println(">>> Date created : "+post.getDate());
//People check
Set<People> people = new HashSet<People>();
if(post.getPeople() != null){
for(People p : post.getPeople()){
People pFromDb = peopleService.findById(p.getId());
people.add(pFromDb != null ? pFromDb : new People("PPL"+GenerateUUID.getUUID(), p.getName()));
}
post.setPeople(people);
}
System.out.println(">>> People created : "+post.getPeople());
//Place check
if(post.getPlace() != null){
Place pFromDb = placeService.findById(post.getPlace().getId());
post.setPlace(pFromDb != null ? pFromDb : new Place(post.getPlace().getId()));
}
System.out.println(">>> Place created : "+post.getPlace());
System.out.println("Post checking OK.");
savedPost = repository.findById(linkTo);
if(savedPost != null){
Set<Post> linked = new HashSet<Post>();
linked.add(savedPost);
post.setLinkedPosts(linked);
}
template.save(post);
System.out.println("=====> [saveWithUser]: Saved OK!");
tx.success();
tx.close();
}
return savedPost;
}
控制器B:
@RequestMapping(value="/newandlinksimilar/{linkedTo}", method=RequestMethod.POST)
public @ResponseBody boolean createAndLinkNewSimilar(@RequestBody Post post, @PathVariable String linkedTo){
Post created = null;
Authentication auth = SecurityContextHolder.getContext().getAuthentication();
if (post!= null && !(auth instanceof AnonymousAuthenticationToken)) {
AppuserDetails userDetails = (AppuserDetails)auth.getPrincipal();
Appuser currentUser = appuserService.findByLogin(userDetails.getUsername());
created = postService.createAndLinkSimilar(currentUser, post, linkedTo);
}
return created;
}
@autowired
private ControllerA controllerA;
@RequestMapping("/init")
public ModelAndView init(){
//I create a new Post object "post" with dummy data
controllerA.createAndLinkSimilar(post,"XXXXXX");
//Or postService.createAndLinkSimilar(appuser,post,"XXXXXX");
return new ModelAndView("home");
}
这两个测试都是通过对控制器方法的GUI ajax调用进行的
我不明白Spring何时以及如何选择事务类型 安慰剂事务是Neo4j中的嵌套事务,它们是在已经有顶级事务运行时创建的,并且仅在以下情况下影响顶级事务:
- 未完成
- 后退
- 终止
finally
中执行close
try (Transaction tx = db.beginTx()) {
... your database code ...
tx.success()
}
真奇怪!!如您所见,我在控制器中没有事务。我试图在控制器的开头添加一个新事务。它的类型也是安慰剂。此控制器是入口点,因此它应该是应该执行的控制器:/而且我已经重新启动了Web服务器。可能是因为数据库中某个地方的文件丢失了吗?
appuserService.findByLogin
do做什么?@覆盖公共Appuser findByLogin(字符串登录){return repository.findByLogin(login);}和存储库方法:@Query(“MATCH(u:Appuser)WHERE u.login={0}return u”)公共Appuser findByLogin(字符串登录);也许你可以公开一个小的单元测试来公开这个行为,我以前也看过,所以不能复制。非常感谢你的帮助。我发现我没有用另一种方法(获取其他数据)正确关闭事务。