nrich
Nrich is a Java library developed at CROZ whose purpose is to make development of applications on JVM a little easier. It contains modules that were found useful on projects and as such were extracted to a common library. It is based on Spring Framework it also provides Spring Boot starters for most of the modules to make configuration easier.
Most modules are composed of multiple submodules:
- api - has the
apisuffix and contains classes that represent API of the module (service interfaces, parameters, return types...) - implementation - contains actual api implementation
- spring boot starter - has the
spring-boot-startersuffix and contains Spring Boot auto configuration of the specified module
In Spring Boot environment only spring boot starter modules should be added as dependencies.
nrich is composed of following modules:
nrich-core-api
Contains common classes that are used throughout library
nrich-encrypt
Provides easier encryption of data, it can encrypt method results and decrypt method arguments. Method for encryption/decryption can be marked using annotations or as properties (i.e. in application.yml files).
nrich-excel
Provides easier generation of excel reports from provided data and templates. Default implementation uses Apache POI library but tries to simplify usage.
nrich-form-configuration
Allows for resolving of server side constraints (jakarta-validation-api) on client side. Its purpose is to have a central place for constraint definitions. On the server side client provides a mapping between client form and class containing constraints. After that when client asks request for form, all constraints with error messages defined for a class are returned to the client that is then responsible for processing and applying them to the form.
nrich-jackson
Sets commonly used defaults for standard Jackson properties (i.e FAIL_ON_EMPTY_BEANS: false) to avoid repeating it in every project. It also provides Jackson modules that serialize empty strings to null and that serialize class name for @Entity annotated classes or classes from defined package list.
nrich-logging
Provides a logging service logging errors in a standard format and can also resolve verbosity and logging levels for each exception. It is used in webmvc module for logging exceptions but can easily be replaced with custom implementation.
nrich-notification
Allows for resolving of client notifications from server side. Notifications can be resolved for controller actions (i.e. Entity has successfully been saved), for exceptions (i.e. Error occurred) and for validation errors (i.e. Validation errors found in request). Validation notification also return a list of validation errors with properties that failed validation. Notification messages are resolved by message keys or exception class names from Springs MessageSource. Users can also return responses with notification. webmvc module uses this module to send notification responses to client on exceptions with registered @RestControllerAdvice.
nrich-registry
Purpose of this module is transforming JPA entities in a format that client can interpret and create dynamic forms and grids for editing of entities without additional implementation on server side. On the server side providing methods for searching, creating, updating and deleting entities through REST API. Configuration consists only from defining included entities and (optionally) providing property label/header messages in messsage.properties.
nrich-search
Allows for easier querying of entities. For its input it uses a class holding values that will be used in a query and a parameter (SearchConfiguration) that defines how those values will be added to query (i.e. what operators should be used, mapping of those properties on entities etc.) it also defines what result type will be returned, what associations should also be fetched etc. It also allows for using string as an input (instead of class holding the value), and a list of fields that should be searched from the entity (for quick search functionality). It was created as a means of simplifying creation of queries for various search forms on client side. Spring Data JPA library is used in implementation and module functionality is added through two repositories interfaces that users can add to their repository interface.
nrich-security-csrf
Intended as a replacement for Spring Security csrf functionality. It works with Spring Web MVC and WebFlux libraries. Clients should define initial token url and after that send generated token with each request in a header or as a parameter.
nrich-spring-boot
Adds additional functionality to Spring Boot. i.e. ConditionalOnPropertyNotEmpty annotation that checks if a property is not empty.
nrich-spring-util
Contains utility classes for Spring access. i.e. ApplicationContextHolder for resolving of ApplicationContext from static context.
nrich-validation
Contains additional jakarta-validation-api constraints and validators (i.e ValidFile, MaxSizeInBytess etc).
nrich-webmvc
Provides additional functionality built on top of Spring Web MVC framework. Main purpose is handling exceptions through NotificationErrorHandlingRestControllerAdvice that handles exceptions by logging them and sending notifications to client with exception descriptions. It also adds additional classes that handle binding (i.e. transforming empty string to null), locale resolving etc.
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