mongodb - How to update document in mongo to get performance? -


i new spring data mongo. i've scenario want create study if not present in mongo db. if present, i've update new values.

i tried in following way, works fine in case, i'm not sure correct/best/advisable way update etc far performance concerned.

could please guide on this? 

public void savestudy(list<study> studies) {         (study study : studies) {             string id = study.getid();             study presentindbstudy = studyrepository.findone(id);              //find document, modify , update save() method.             if(presentindbstudy != null) {                 presentindbstudy.settitle(task.gettitle());                 presentindbstudy.setdescription(study.getdescription());                     presentindbstudy.setstart(study.getstart());                 presentindbstudy.setend(study.getend());                 repository.save(presentindbstudy);             }             else                 repository.save(study);         }     }

you have use mongotemplate.upsert() achieve this. need add 2 more classes: studyrepositorycustom interface , class extends interface, studyrepositoryimpl

interface studyrepositorycustom {    public writeresult updatestudy(study study); }

update current studyrepository extend interface

@repository public interface studyrepository extends mongorepository<study, string>, studyrepositorycustom {    // ... code before }

and add class implements studyrepositorycustom. @autowire our mongotemplate , provide implementation updating study or saving if not exist. use mongotemplate.upsert() method.

class studyrepositoryimpl implements studyrepositorycustom {    @autowired    mongotemplate mongotemplate;     public writeresult updatestudy(study study) {       query searchquery = new query(criteria.where("id").is(study.getid());       writeresult update = mongotemplate.upsert(searchquery, update.update("title", study.gettitle).set("description", study.getdescription()).set(...)), study.class);       return update;    } }

kindly note studyrepositoryimpl automatically picked spring data infrastructure we've followed naming convention of extending core repository interface's name impl

check this example on github, @autowire-ing mongotemplate , using custom repository above.

i have not tested code guide :-)


Comments

Post a Comment

Popular posts from this blog

asynchronous - C# WinSCP .NET assembly: How to upload multiple files asynchronously -

i using winscp .net assembly uploading files. want upload multiple files asynchronous way. have created method works single upload. public class uploadingdata { private sessionoptions _sessionoptions; private session _session; //connection etc private void onconnected() { foreach (var fileinfo in localfileslist) { var task = task.factory.startnew(() => uploadfilesasync(fileinfo)); } } private async task uploadfilesasync(string file) { string remotefilepath = _session.translatelocalpathtoremote(file, @"/", "/test_data_upload"); var uploading = _session.putfiles(file, remotefilepath, false); //when done await task.run(() => thread.sleep(1000)); } } please suggest me correct way. thanks you can use backgroundworker class this: string[] images = new string[50]; foreach (var path in images) { backgroundworker
Read more

aws api gateway - SerializationException in posting new Records via Dynamodb Proxy Service in API -

i getting "__type": "com.amazon.coral.service#serializationexception" as reply in postman & in test console in api gateway trying post record directly dynamodb using api proxy services.. referring aws article - https://aws.amazon.com/blogs/compute/using-amazon-api-gateway-as-a-proxy-for-dynamodb/ here's mapping { "tablename": "tablenamegoeshere", "item": { "id" : "$context.requestid" "eventname" : "$input.path('$.eventname')", "timestamp" : $input.path('$.timestamp'), "answers": "$util.parsejson($input.path('$.answers'))" } } update: did asked ... , worked if try add array of json objects gives me above same error - here's trying now. please - couldnt find on google well #set($inputroot = $input.path('$')) { "tablename": "answer", "item": {
Read more

asp.net - Problems sending emails from forum -

i have been redesigning site has message board, has been written guy looked after site. it has few problems , written in .asp , uses .mdb files database. you can see whole thing here . feel free post if helps, test thing have set using original files , new database. the basic problem when posts message, supposed email sent them, have posted it. when replies, originator supposed message, replier has been posted. i’d have thought @ point in process there should script/file in postmessage.asp? the postmessage.asp page below. <% option explicit %> <!-- #include virtual="common/adovbs.inc" --> <html> <head> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> <meta name="generator" content="microsoft frontpage 4.0"> <meta name="progid" content="frontpage.editor.document"> <title>new page 2</title> <base target="_self"
Read more