Configuring Lombok on IntelliJ - Installation of Lombok plugin

How to install/configure Lombok plugin on IntelliJ IDEA :

Steps :

1) Installation 
Using IDE built-in plugin system on Windows:

• File > Settings > Plugins > Browse repositories... > Search for "lombok" > Install Plugin

Using IDE built-in plugin system on MacOs:

• Preferences > Settings > Plugins > Browse repositories... > Search for "lombok" > Install Plugin

Manually:

• Download the latest release from https://github.com/mplushnikov/lombok-intellij-plugin 
• Install it manually using Preferences > Plugins > Install plugin from disk...

2) Restart IDE.
3) Enable Annotation Processing
 In your project: Click Preferences, "Build, Execution, Deployment", Compiler, Annotation Processors. Click Enable Annotation Processing

Enabling Annotation Processing on IntelliJ IDEA

Optional) IntelliJ and Eclipse compiler
If you're using Eclipse compiler with lombok, try this setup:

• install plugin (above process)
• change compiler setting:
•  > Compiler > Java Compiler > Use Compiler: Eclipse
•  > Compiler > Annotation Processors > Enable annotation processing: checked (default configuration)
•  > Compiler > Additional build process VM options: -javaagent:lombok.jar

References :

• https://github.com/mplushnikov/lombok-intellij-plugin
• http://stackoverflow.com/questions/24006937/lombok-annotations-do-not-compile-under-intellij-idea
• http://stackoverflow.com/questions/9424364/cant-compile-project-when-im-using-lombok-under-intellij-idea
• https://projectlombok.org/index.html
• https://projectlombok.org/mavenrepo/

MongoException$DuplicateKey: E11000 duplicate key error index - @Version

Obviously, we get this exception when we try to update/insert a document(record) with duplicate key field in MongoDB collection(table). There exists several explanation on this:

• http://stackoverflow.com/questions/24430220/e11000-duplicate-key-error-index-in-mongodb-mongoose
• http://stackoverflow.com/questions/16465416/mongodb-upsert-throwing-duplicatekeyexception
• https://www.youtube.com/watch?v=7SLerprHiG8

But, I was getting this error in a different scenario:

1) I already had a model User and data in it. Sample data were being created using mongeez change log file
2) Later, I added a new auditing field @Version to the entity definition.
3) When updating a User record, I got the above exception ( MongoException$DuplicateKey: E11000 duplicate key error index )

User entity :

@Document(collection = "user")
public class User implements Serializable {

    @NotNull    @Size(min = 5, max = 100)
    @Id    private String id;

    @Version    Long version; // THIS WAS ADDED LATER
    
    @Size(max = 50)
    @Field("first_name")
    private String firstName;

    @Field("last_name")
    private String lastName;

    @Email
    private String email;

 

Solution :

I added a property version and initialized to 1 in all documents

Mongo Change Log  : Using mongeez

<mongoChangeLog>
    <changeSet changeId="ChangeSet-2" author="gtiwari">
        <script>
            db.user.insert(
            {
                "_id" : "user1",
                "first_name": "",
                "last_name": "User 1",
                "email": "user1@localhost",
                "version":1  --> I UPDATED ALL user RECORDS'S VERSION = 1 TO SOLVE THIS
            });