Develop Reference

Redis Server is not getting Refreshed

I'm using redis in my springboot rest application to store cache. But the problem I'm facing is once it is stored in redis my api only hits the redis not the database. I've added time out property it didn't work. I've tried CacheManager to get the cache and call CacheEvict to clear the cache and then CachePut to put the data again, but it didn't work. These are the things I've tried so far. I wanted my redis cache to refresh after a given time set by me. Any advice on this? Here is my code below:
package com.dg.repo;
import java.util.List;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
import com.dg.entity.FlightEntity;
public interface FlightRepo extends JpaRepository<FlightEntity, String> {
#Query(value="select distinct txtFlightName\r\n"
+ "from {test-schema}flights", nativeQuery = true)
List<String> getAllFlights();
#Query(value="select distinct txtFlightName from {test-schema}flights \r\n"
+ "where txtFlightName LIKE %:flightname%",nativeQuery = true)
List<String> getListofFlights(#Param("flightname")String flightname);
#Query(value="select distinct txtBookingCode,txtFlightName from {test-schema}flights \r\n"
+ "where txtFlightName LIKE %:flightname%",nativeQuery = true)
List<FlightEntity> getFlightEntity(#Param("flightname")String flightname);
}
package com.dg.repo;
import java.util.List;
import java.util.Optional;
import java.util.function.Function;
import org.springframework.data.domain.Example;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.repository.query.FluentQuery.FetchableFluentQuery;
import com.dg.entity.FlightEntity;
public abstract class FlightRepoImpl implements FlightRepo {
RedisTemplate template;
HashOperations hashOperations;
public FlightRepoImpl(RedisTemplate template, HashOperations hashOperations) {
super();
this.template = template;
this.hashOperations = template.opsForHash();
}
#Override
public List<String> getAllFlights() {
return hashOperations.values("FlightModel");
}
#Override
public List<String> getListofFlights(String flightname) {
return (List<String>) hashOperations.get("FlightModel", flightname);
}
}
package com.dg.service;
import org.modelmapper.ModelMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import com.dg.model.FlightModel;
import com.dg.repo.FlightRepo;
public class FlightService {
#Autowired
FlightRepo flightRepo;
#Autowired
ModelMapper modelMapper;
#Scheduled(fixedRate = 50000)
#Caching(evict = {#CacheEvict(value="getFlightList", key="#flightname")})
public FlightModel getFlightByFlightName(String flightName)
{
package com.dg.model;
import java.io.Serializable;
import java.util.List;
public class FlightModel implements Serializable{
private List<Object> listofflightname;
public List<Object> getListofflightname() {
return listofflightname;
}
public void setListofflightname(List<Object> listofflightname) {
this.listofflightname = listofflightname;
}
}
package com.dg.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
#Entity
public class FlightEntity {
#Id
#Column(name="txtBookingCode")
private String bookingCode;
#Column(name="txtFlightName")
private String flightname;
public String getBookingCode() {
return bookingCode;
}
public void setBookingCode(String bookingCode) {
this.bookingCode = bookingCode;
}
public String getFlightname() {
return flightname;
}
public void setFlightname(String flightname) {
this.flightname = flightname;
}
}
package com.dg.config;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.data.redis.connection.RedisClusterConfiguration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.repository.configuration.EnableRedisRepositories;
import redis.clients.jedis.JedisPoolConfig;
#Configuration
#EnableRedisRepositories
#Profile("test")
public class RedisConfig {
#Value("${spring.redis.cluster.nodes}")
private String nodesProperty;
#Bean
public JedisConnectionFactory jedisConnectionFactory()
{
JedisPoolConfig poolConfig = new JedisPoolConfig();
poolConfig.setMinIdle(2);
poolConfig.setMaxIdle(5);
poolConfig.setMaxTotal(20);
poolConfig.setEvictorShutdownTimeoutMillis(10000);
String [] nodesArray=nodesProperty.split(",");
List<String> nodes = new ArrayList<String>(Arrays.asList(nodesArray));
RedisClusterConfiguration configuration=new RedisClusterConfiguration(nodes);
configuration.setMaxRedirects(100);
JedisConnectionFactory connectionFactory = new JedisConnectionFactory(configuration);
connectionFactory.setPoolConfig(poolConfig);
return connectionFactory;
}
#Bean
public RedisTemplate redisTemplate()
{
RedisTemplate template = new RedisTemplate();
template.setConnectionFactory(jedisConnectionFactory());
return template;
}
}
package com.dg;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;
#SpringBootApplication
#EnableCaching
public class RedisTestApplication {
public static void main(String[] args) {
SpringApplication.run(RedisTestApplication.class, args);
}
}

How to properly #Autowire a component in a Spring Boot App

I'm putting together a simple Spring Boot app, and having an issue with an #Autowired field not "showing up".
My main app class:
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class SpringElasticCatalogApi {
public static void main(String[] args) {
SpringApplication.run(SpringElasticCatalogApi.class, args);
}
}
My Repository class:
import com.discover.harmony.elastic.model.Customer;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Component;
import java.util.List;
#Component
public interface CustomerRepository extends ElasticsearchRepository<Customer, String> {
public Customer findByFirstName(String firstName);
public List<Customer> findByLastName(String lastName);
}
This class ("Loaders") requires an #Autowired repository field, which is NULL:
import com.discover.harmony.elastic.model.BusinessMetadata;
import com.discover.harmony.elastic.model.Customer;
//import com.discover.harmony.elastic.repository.CustomerRepository;
import com.discover.harmony.elastic.api.CustomerRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import javax.annotation.PostConstruct;
import java.util.ArrayList;
import java.util.List;
//#Configuration
#Component
public class Loaders {
#Autowired
private CustomerRepository repository;
#PostConstruct
#Transactional
public void loadAll(){
this.repository.deleteAll();
saveCustomers();
fetchAllCustomers();
fetchIndividualCustomers();
}
private void saveCustomers() {
this.repository.save(new Customer("Alice", "Smith"));
this.repository.save(new Customer("Bob", "Smith"));
}
private void fetchAllCustomers() {
System.out.println("Customers found with findAll():");
System.out.println("-------------------------------");
for (Customer customer : this.repository.findAll()) {
System.out.println(customer);
}
System.out.println();
}
private void fetchIndividualCustomers() {
System.out.println("Customer found with findByFirstName('Alice'):");
System.out.println("--------------------------------");
System.out.println(this.repository.findByFirstName("Alice"));
System.out.println("Customers found with findByLastName('Smith'):");
System.out.println("--------------------------------");
for (Customer customer : this.repository.findByLastName("Smith")) {
System.out.println(customer);
}
}
private List<BusinessMetadata> getData() {
List<BusinessMetadata> metadata = new ArrayList<>();
metadata.add(new BusinessMetadata((long)1,"TradeLine"));
metadata.add(new BusinessMetadata((long)2,"Credit Line"));
metadata.add(new BusinessMetadata((long)3,"Other Line"));
return metadata;
}
}
What should I change, to make the #Autowire work as expected here?

The problem is that your example is not complete on implementing the ElasticSearch. To proof this, turn your CustomerRepository into a class and remove ElasticsearchRepository<Customer, String> then everything goes fine.
What you need to do is adding a new Configuration class, with #EnableElasticsearchRepositories(basePackages = "com.discover.harmony.elastic.api.CustomerRepository") to scan the provided package for Spring Data repositories.
You can find a complete example here.

Spring #Autowired fails when ApplicationContext is inside another context

I'm trying to put together an SDK that uses Spring internally through a context it manages of its own. I want the jar that gets built to be usable regardless of whether or not Spring is in use on the application that wants to use the SDK.
I have something that works when it is running on its own. However if I attempt to use the SDK inside another Spring context (in my case a Spring Boot based application) I get a org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type exception.
Try as I might I cannot understand how to get this working, or indeed what I am doing wrong. The classes below show what I'm doing, the org.example.testapp.MySDKTest fails with the exception while the org.example.test.MySDKTest successfully passes. Sorry there is so much code but I can't reproduce the issue with a simplified case.
SDK source
package org.example.mysdk;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.example.mysdk.MyService;
import org.example.mysdk.MyServiceConfiguration;
public final class MySDK {
private static ApplicationContext applicationContext;
public static <T extends MyService> T getService(Class<? extends MyService> clazz, MyServiceConfiguration configuration) {
T tmp = (T) getApplicationContext().getBean(clazz);
tmp.setConfiguration(configuration);
return tmp;
}
private static ApplicationContext getApplicationContext() {
if (applicationContext == null) {
applicationContext = new AnnotationConfigApplicationContext(SpringContext.class);
}
return applicationContext;
}
}
.
package org.example.mysdk;
import org.springframework.beans.factory.annotation.Autowired;
public abstract class MyService {
private MyServiceConfiguration configuration;
#Autowired
private MyAutowiredService myAutowiredService;
MyService() {
}
MyService(MyServiceConfiguration configuration) {
super();
this.configuration = configuration;
}
public MyServiceConfiguration getConfiguration() {
return configuration;
}
void setConfiguration(MyServiceConfiguration configuration) {
this.configuration = configuration;
}
String getSomething(String in) {
return "something + " + myAutowiredService.getThing(configuration.getValue()) + " and " + in;
}
}
.
package org.example.mysdk;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Service;
#Service
#Scope("prototype")
public class MyServiceImpl1 extends MyService {
public MyServiceImpl1() {
}
public MyServiceImpl1(MyServiceConfiguration configuration) {
super(configuration);
}
public String method1() {
return this.getSomething("method1");
}
}
.
package org.example.mysdk;
public class MyServiceConfiguration {
private String value;
public void setValue(String value) {
this.value = value;
}
public String getValue() {
return value;
}
}
.
package org.example.mysdk;
import org.springframework.stereotype.Service;
import javax.annotation.PostConstruct;
#Service
public class MyAutowiredService {
private String thing = "a value";
public String getThing(String in) {
return thing + " " + in;
}
#PostConstruct
void init() {
System.out.println("MyAutowiredService bean created");
}
}
.
package org.example.mysdk;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
#Configuration
#ComponentScan(basePackages = {
"org.example.mysdk"
})
public class SpringContext {
}
Tests
This first test fails with a org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type exception,
package org.example.testapp;
import static org.junit.Assert.*;
import org.example.mysdk.MyServiceConfiguration;
import org.example.mysdk.MyServiceImpl1;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.support.AnnotationConfigContextLoader;
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(classes = App.class, loader = AnnotationConfigContextLoader.class)
public class MySDKTest {
#Autowired
MyServiceImpl1 service;
#Test
public void test() {
MyServiceConfiguration conf = service.getConfiguration();
assertEquals(conf.getValue(), "this is the instance configuration");
}
}
.
package org.example.testapp;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.example.mysdk.MySDK;
import org.example.mysdk.MyServiceConfiguration;
import org.example.mysdk.MyServiceImpl1;
#Configuration
#ComponentScan(basePackages = {
"org.example.testapp"
})
public class App {
#Bean
public MyServiceImpl1 myServiceImpl1() {
MyServiceConfiguration configuration = new MyServiceConfiguration();
configuration.setValue("this is the instance configuration");
return MySDK.getService(MyServiceImpl1.class, configuration);
}
}
and this test succeeds,
package org.example.test;
import static org.junit.Assert.*;
import org.example.mysdk.MySDK;
import org.example.mysdk.MyServiceConfiguration;
import org.example.mysdk.MyServiceImpl1;
import org.junit.Test;
public class MySDKTest {
#Test
public void test() {
MyServiceConfiguration configuration = new MyServiceConfiguration();
configuration.setValue("this is the instance configuration");
MyServiceImpl1 service = MySDK.getService(MyServiceImpl1.class, configuration);
assertEquals(service.getConfiguration().getValue(), "this is the instance configuration");
}
}
If I've gone about this the completely wrong way I'm happy to hear suggestions of how this should be done differently!

You have to modify two files.
First App.java, it should scan for "org.example.mysdk" package to inject myAutowiredService in abstract class MyService, If not it has to be created in App.java. And the name of the MyServiceImpl1 bean must be different from myServiceImpl1 as it will conflict.
package org.example.testapp;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.example.mysdk.MySDK;
import org.example.mysdk.MyServiceConfiguration;
import org.example.mysdk.MyServiceImpl1;
#Configuration
#ComponentScan(basePackages = {
"org.example.testapp", "org.example.mysdk"
})
public class App {
#Bean
public MyServiceImpl1 myServiceImpl() {
MyServiceConfiguration configuration = new MyServiceConfiguration();
configuration.setValue("this is the instance configuration");
return MySDK.getService(MyServiceImpl1.class, configuration);
}
}
Then secondly in MySDKTest.java should inject myServiceImpl which was created in App.java
import static org.junit.Assert.*;
import org.example.mysdk.MyServiceConfiguration;
import org.example.mysdk.MyServiceImpl1;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.support.AnnotationConfigContextLoader;
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(classes = App.class, loader = AnnotationConfigContextLoader.class)
public class MySDKTest {
#Autowired
MyServiceImpl1 myServiceImpl;
#Test
public void createOxiAccountService() {
MyServiceConfiguration conf = myServiceImpl.getConfiguration();
assertEquals(conf.getValue(), "this is the instance configuration");
}
}

#Autowired doesn't work(Dependency not injected)

today I'm having problem with spring.
Here is my code:
SpringConfig.java
package com.berrigan.addonsserver.springconfig;
import com.berrigan.addonsserver.EndPoint;
import org.glassfish.tyrus.server.Server;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
#Configuration
#ComponentScan(basePackages={"com.berrigan.addonsserver","com.berrigan.addonsserver.modules"})
public class SpringConfig {
#Bean
public Server server(EndPoint end){
return new Server("localhost",8025, "/margonem",null,end.getClass());
}
}
EndPoint.java
package com.berrigan.addonsserver;
import com.berrigan.addonsserver.modules.ResponseGenerator;
import com.berrigan.addonsserver.util.JSONOutputTemplate;
import com.google.gson.Gson;
import javax.websocket.OnMessage;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
#Component("endPoint")
#ServerEndpoint(value="/server")
public class EndPoint {
#Autowired
public ResponseGenerator rg;
public EndPoint(){ System.out.println("Sucks");}
public EndPoint(ResponseGenerator rg){ this.rg = rg; System.out.println("Rg is set");}
#OnMessage
public String onMessage(String message, Session s){
Gson g = new Gson();
if(rg == null) System.out.println("DI DOESN'T WORK");
else{
JSONOutputTemplate output = rg.generateResponse(null);//new JSONOutputTemplate();//
g.toJson(output);
}
return message;
}
public void setResponseGenerator(ResponseGenerator rg){
System.out.println("This works");
this.rg = rg;
}
}
ResponseGenerator.java
package com.berrigan.addonsserver.modules;
import com.berrigan.addonsserver.annotations.AuthorizationRequired;
import com.berrigan.addonsserver.util.JSONInputTemplate;
import com.berrigan.addonsserver.util.JSONOutputTemplate;
import org.springframework.stereotype.Component;
#Component
public class ResponseGeneratorImpl implements ResponseGenerator{
#Override
#AuthorizationRequired
public JSONOutputTemplate generateResponse(JSONInputTemplate data) {
return new JSONOutputTemplate();
}
}
My output says "Sucks", and "DI DOESN'T WORK". When I tried to get ResponseGenerator bean from ApplicationConfig, there wasn't null. I've no idea what's wrong. Thanks in advance.

Spring-Data-Rest Validator

I have been trying to add spring validators to a spring-data-rest project.
I followed along and setup the "getting started" application via this link: http://spring.io/guides/gs/accessing-data-rest/
...and now I am trying to add a custom PeopleValidator by following the documents here:
http://docs.spring.io/spring-data/rest/docs/2.1.0.RELEASE/reference/html/validation-chapter.html
My custom PeopleValidator looks like
package hello;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
public class PeopleValidator implements Validator {
#Override
public boolean supports(Class<?> clazz) {
return true;
}
#Override
public void validate(Object target, Errors errors) {
errors.reject("DIE");
}
}
...and my Application.java class now looks like this
package hello;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;
#Configuration
#EnableJpaRepositories
#Import(RepositoryRestMvcConfiguration.class)
#EnableAutoConfiguration
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
#Bean
public PeopleValidator beforeCreatePeopleValidator() {
return new PeopleValidator();
}
}
I would expect that POSTing to the http://localhost:8080/people URL would result in an error of some kind since the PeopleValidator is rejecting everything. However, no error is thrown, and the validator is never called.
I have also tried manually setting up the validator as shown in section 5.1 of the spring-data-rest documentation.
What am I missing?

So it appears that the before/after "save" events only fire on PUT and PATCH. When POSTing, the before/after "create" events fire.
I tried it the manual way again using the configureValidatingRepositoryEventListener override and it worked. I'm not sure what I'm doing differently at work than here at home. I'll have to look tomorrow.
I sure would love to hear if others have suggestions on why it wouldn't work.
For the record, here is what the new Application.java class looks like.
package hello;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.data.rest.core.event.ValidatingRepositoryEventListener;
import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;
#Configuration
#EnableJpaRepositories
#Import(RepositoryRestMvcConfiguration.class)
#EnableAutoConfiguration
public class Application extends RepositoryRestMvcConfiguration {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
#Override
protected void configureValidatingRepositoryEventListener(ValidatingRepositoryEventListener validatingListener) {
validatingListener.addValidator("beforeCreate", new PeopleValidator());
}
}

Looks like the feature is currently not implemented (2.3.0), unluckily there are no constants for the event names otherwise the solution below would not be that fragile.
The Configuration adds all properly named Validator beans to ValidatingRepositoryEventListener using the right event.
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.ListableBeanFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.rest.core.event.ValidatingRepositoryEventListener;
import org.springframework.validation.Validator;
#Configuration
public class ValidatorRegistrar implements InitializingBean {
private static final List<String> EVENTS;
static {
List<String> events = new ArrayList<String>();
events.add("beforeCreate");
events.add("afterCreate");
events.add("beforeSave");
events.add("afterSave");
events.add("beforeLinkSave");
events.add("afterLinkSave");
events.add("beforeDelete");
events.add("afterDelete");
EVENTS = Collections.unmodifiableList(events);
}
#Autowired
ListableBeanFactory beanFactory;
#Autowired
ValidatingRepositoryEventListener validatingRepositoryEventListener;
#Override
public void afterPropertiesSet() throws Exception {
Map<String, Validator> validators = beanFactory.getBeansOfType(Validator.class);
for (Map.Entry<String, Validator> entry : validators.entrySet()) {
EVENTS.stream().filter(p -> entry.getKey().startsWith(p)).findFirst()
.ifPresent(p -> validatingRepositoryEventListener.addValidator(p, entry.getValue()));
}
}
}

A bit of a stab in the dark - I've not used spring-data-rest. However, after having a read of the tutorial you're following, I think the problem is that you need a PersonValidator not a PeopleValidator. Rename everything accordingly:
PersonValidator
package hello;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
public class PersonValidator implements Validator {
#Override
public boolean supports(Class<?> clazz) {
return true;
}
#Override
public void validate(Object target, Errors errors) {
errors.reject("DIE");
}
}
Application
package hello;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;
#Configuration
#EnableJpaRepositories
#Import(RepositoryRestMvcConfiguration.class)
#EnableAutoConfiguration
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
#Bean
public PersonValidator beforeCreatePersonValidator() {
return new PersonValidator();
}
}

Another way of doing it is to use annotated handlers as specified here
http://docs.spring.io/spring-data/rest/docs/2.1.0.RELEASE/reference/html/events-chapter.html#d5e443
Here is an example of how to use annotated handlers:
import gr.bytecode.restapp.model.Agent;
import org.springframework.data.rest.core.annotation.HandleBeforeCreate;
import org.springframework.data.rest.core.annotation.HandleBeforeSave;
import org.springframework.data.rest.core.annotation.RepositoryEventHandler;
import org.springframework.stereotype.Component;
#Component
#RepositoryEventHandler(Agent.class)
public class AgentEventHandler {
public static final String NEW_NAME = "**modified**";
#HandleBeforeCreate
public void handleBeforeCreates(Agent agent) {
agent.setName(NEW_NAME);
}
#HandleBeforeSave
public void handleBeforeSave(Agent agent) {
agent.setName(NEW_NAME + "..update");
}
}
Example is from github edited for brevity.