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springboot upgrade from 2.5.6 to 2.6.6 issue

#Configuration
public class A {
#Autowired
private Integer connectTimeOut;
#Bean
public Integer connectTimeOut(){
return getTimeOutConfigured(HTTP_CONNECT_TIME_OUT, -1);
}
}
Springboot can't start successfully with below issue:
The dependencies of some of the beans in the application context form a cycle:
┌──->──┐
| A (field private java.lang.Integer XXX.XXX.XXX.XXX.XXXX.XXX.A.connectTimeOut)
└──<-──┘
It can work fine from springboot 2.5.6. But it can't start for 2.6.6.
Any one who has the experience? or any advice?

It sounds like you're using this connectTimeOut value somewhere, probably in some other bean:
public class MyBean {
private final Integer connectTimeOut;
public MyBean(Integer connectTimeOut) {
this.connectTimeOut = connectTimeOut;
}
}
And your configuration class looks something like this:
#Configuration
public class A {
#Autowired
private Integer connectTimeOut;
#Bean
public Integer connectTimeOut(){
return getTimeOutConfigured(HTTP_CONNECT_TIME_OUT, -1);
}
#Bean
public MyBean myBean() {
return new MyBean(connectTimeOut);
}
}
If so, consider using the built-in mechanism of spring boot to work with configuration properties:
#ConfigurationProperties
public class MyConfigProperties{
private Integer connectTimeOut = -1; // default
// setter, getter, no-args-constructor
}
In application.yml or properties file define:
application.yml
connectTimeOut: 30
Now you can rewrite the configuration and get rid of the autowiring altogether:
#Configuration
#EnableConfigurationProperties(MyConfigProperties.class)
public class A {
#Bean
public MyBean myBean(MyConfigProperties config) { // Injecting the configuration!!!
return new MyBean(config.getConnectTimeOut());
}
}

A cycle would explain why it worked in 2.5 but not in 2.6. The Spring Boot 2.6 Release Notes describe what's going on and how to resolve the issue:
Circular references between beans are now prohibited by default. If your application fails to start due to a BeanCurrentlyInCreationException you are strongly encouraged to update your configuration to break the dependency cycle. If you are unable to do so, circular references can be allowed again by setting spring.main.allow-circular-references to true, or using the new setter methods on SpringApplication and SpringApplicationBuilder This will restore 2.5’s behaviour and automatically attempt to break the dependency cycle.

Spring Data Cassandra config change on the fly

I am trying to do a similar thing with my application. I am using following versions of Spring boot and Cassandra:
spring-data-cassandra - 2.0.8.RELEASE
spring-boot-starter-parent - 2.0.4.RELEASE
I need to change some properties(mostly hostnames) of Cassandra on the fly and want it to make a new connection with the application. For config change we have internal Cloud Config Change Management and it runs fine on changes and listens to it.
This is my class :
#Configuration
#Order(Ordered.HIGHEST_PRECEDENCE)
#RefreshScope
#EnableCassandraRepositories(basePackages = {"com.*.*.*.dao.repo"})
public class AppConfig {
private static final Logger LOGGER = LoggerFactory.getLogger(AppConfig.class);
#Value("${application['cassandraPort']}")
private String cassandraPort;
#Value("${application['cassandraEndpoint']}")
private String cassandraEndpoint;
#Value("${application['keyspaceName']}")
private String keyspaceName;
#Value("${application['cassandraConsistency']}")
private String cassandraConsistency;
#Value("${application['cassandraUserName']}")
private String cassandraUserName;
#Autowired
private AppConfig appConfig;
public AppConfig() {
System.out.println("AppConfig Constructor");
}
public String getCassandraPort() {
return cassandraPort;
}
public void setCassandraPort(String cassandraPort) {
this.cassandraPort = cassandraPort;
}
public String getCassandraEndpoint() {
return cassandraEndpoint;
}
public void setCassandraEndpoint(String cassandraEndpoint) {
this.cassandraEndpoint = cassandraEndpoint;
}
public String getKeyspaceName() {
return keyspaceName;
}
public void setKeyspaceName(String keyspaceName) {
this.keyspaceName = keyspaceName;
}
public String getCassandraConsistency() {
return cassandraConsistency;
}
public void setCassandraConsistency(String cassandraConsistency) {
this.cassandraConsistency = cassandraConsistency;
}
public String getCassandraUserName() {
return cassandraUserName;
}
public void setCassandraUserName(String cassandraUserName) {
this.cassandraUserName = cassandraUserName;
}
#Bean
// #RefreshScope
public CassandraConverter converter() {
return new MappingCassandraConverter(this.mappingContext());
}
#Bean
// #RefreshScope
public CassandraMappingContext mappingContext() {
return new CassandraMappingContext();
}
#Bean
//#RefreshScope
public CassandraSessionFactoryBean session() {
CassandraSessionFactoryBean session = new CassandraSessionFactoryBean();
session.setCluster(this.cluster().getObject());
session.setKeyspaceName(appConfig.getKeyspaceName());
session.setConverter(this.converter());
session.setSchemaAction(SchemaAction.NONE);
return session;
}
#Bean
//#RefreshScope
public CassandraClusterFactoryBean cluster() {
CassandraClusterFactoryBean cluster = new CassandraClusterFactoryBean();
cluster.setContactPoints(appConfig.getCassandraEndpoint());
cluster.setPort(Integer.valueOf(appConfig.getCassandraPort()));
cluster.setUsername(appConfig.getCassandraUserName());
cluster.setPassword("password");
cluster.setQueryOptions(new QueryOptions().setConsistencyLevel(ConsistencyLevel.LOCAL_QUORUM));
return cluster;
}
}
However, when I try to use #RefreshScope with that Configuration class, the application fails to start. This is what it shows in console :
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 2 of constructor in org.springframework.boot.autoconfigure.data.cassandra.CassandraDataAutoConfiguration required a bean of type 'com.datastax.driver.core.Cluster' that could not be found.
- Bean method 'cassandraCluster' not loaded because auto-configuration 'CassandraAutoConfiguration' was excluded
Action:
Consider revisiting the entries above or defining a bean of type 'com.datastax.driver.core.Cluster' in your configuration.
Is there some guidelines on using #RefreshScope with Cassandra Bean? If anyone has done that earlier can you share the same?

You're mixing a couple of things here.
The config carries properties and bean definitions.
#RefreshScope on AppConfig causes some interference with Spring Boot's auto-configuration and the declared beans aren't used (that's why you see Parameter 2 of constructor…).
To clean up, we will reuse what Spring Boot provides as much as possible, and only declare what's really needed.
Follow these steps to solve the issue (based on your code above):
Create a #ConfigurationProperties bean that encapsulates your properties, or better, reuse CassandraProperties.
Re-enable CassandraAutoConfiguration and remove your own MappingContext and CassandraConverter beans, keep only Cluster and Session bean definitions
Declare Cluster and Session beans as needed and make them use #RefreshScope. Your #Configuration class should look like:
Example Configuration:
#Configuration
public class MyConfig {
#Bean(destroyMethod = "close")
#RefreshScope
public Cluster cassandraCluster(CassandraProperties properties) {
Cluster.Builder builder = Cluster.builder().addContactPoints(properties.getContactPoints().toArray(new String[0]))
.withoutJMXReporting();
return builder.build();
}
#Bean(destroyMethod = "close")
#RefreshScope
public Session cassandraSession(CassandraProperties properties, Cluster cluster) {
return cluster.connect(properties.getKeyspaceName());
}
}

Injecting library class as dependencies in spring project

I have multiple library classes in my project which need to be injected into a service class. This is the error statement for IntegrationFactory class:
Consider defining a bean of type 'com.ignitionone.service.programmanager.integration.IntegrationFactory' in your configuration.
This error is coming on almost every injection where this library class is injected.
I have already added the Library package in #ComponentScan, but, as it is read-only file, I can not annotate the library class. I came to know from some answer here that Spring can not inject classes which it does not manage. This library is not built on spring.
I have tried to create a #Bean method which returns the IntegrationFactory(class in question) in the class where #Inject is used, but this too does not seem to work.
How can this be done, preferably without creating a stub/copy class?
This is EngagementServiceImpl class snippet:
#Inject
public EngagementServiceImpl(EngagementRepository engagementRepository,
#Lazy IntegrationFactory integrationFactory, TokenRepository tokenRepository,
EngagementPartnerRepository engagementPartnerRepository, MetricsService metricsService) {
this.engagementRepository = engagementRepository;
this.integrationFactory = integrationFactory;
this.tokenRepository = tokenRepository;
this.engagementPartnerRepository = engagementPartnerRepository;
this.metricsService = metricsService;
}
This is injection part:
#Autowired
private EngagementService engagementService;
This is ConfigClass:
#Configuration
public class ConfigClass {
#Bean
public IntegrationFactory getIntegrationFactory(){
Map<String, Object> globalConfig = new HashMap<>();
return new IntegrationFactory(globalConfig);
}
#Bean
#Primary
public EntityDataStore getEntityDataStore(){
EntityModel entityModel = Models.ENTITY;
return new EntityDataStore(this.dataSource(), entityModel );
}
#ConfigurationProperties(prefix = "datasource.postgres")
#Bean
#Primary
public DataSource dataSource() {
return DataSourceBuilder
.create()
.build();
}
}

You need to add your bean definitions in a configuration class.
#Configuration
public class ServiceConfig {
#Bean
public IntegrationFactory getIntegrationFactory(){
// return an IntegrationFactory instance
}
}
Then you have to make sure your #Configuration class gets detected by Spring, either by having it within your scanned path or by manually importing it via #Import from somewhere withing you scanned path. An example of #Import, considering you are using Spring Boot.
#Import(ServiceConfig.class)
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
Hope this helps!

Your Bean IntegrationFactory can't be found, as it is not annotated with any Spring stereotype and therefore not recognized by the component scan.
As you have multiple options to provide an instance of your class to the application context, read the Spring documentation (which also includes samples) to find out which one fits you the most:
https://docs.spring.io/spring/docs/5.1.0.RELEASE/spring-framework-reference/core.html#beans-java-basic-concepts
One Option would be to create a factory which provides an instance of your class to the application context, like it is stated in the documentation:
#Configuration
public class AppConfig {
#Bean
public IntegrationFactory myIntegrationFactory() {
return new IntegrationFactory();
}
}
Do not forget to add the Configuration to the application context.

RefreshScope is not refreshing HessianProxyFactoryBean

My configuration class where I initialize the hessian bean
#RefreshScope
#Configuration // #Component also not working
public class HessianConfiguration {
#Value("${sample.hessian.url}")
private String sampleUrl;
#Bean
public HessianProxyFactoryBean initSampleBean() {
HessianProxyFactoryBean invoker = new HessianProxyFactoryBean();
invoker.setServiceUrl(sampleUrl);
invoker.setServiceInterface(Sample.class);
return invoker;
}
}
And a sample component class where I use the bean.
#RefreshScope
#Component
public class SampleService {
#Autowired
Sample sample;
public String doRemoteOperation(String value){
return sample.doRemoteOperation(value);
}
}
sample.hessian.url is retrieved from spring config server.
But after changing the value of sample.hessian.url and calling "refresh" endpoint, the autowired sample bean is still trying to hit the old url value.
What am I doing wrong here ?

Making a bean primary without annotation or xml config

My project has a dependency on another one, and imports beans from it (using #ImportResource("foo.xml")).
foo.xml defines two datasources (datasource1 and datasource2), I would like to make datasource1 a primary (so all auto-configurations of Spring Boot will work).
Is it possible? I found out that there is a DefaultListableBeanFactory that has determinePrimaryCandidate method.
So the idea is to create my own ListableBeanFactory, that would extend the DefaultListableBeanFactory, but how to force Spring Boot to use my implementation?
Or maybe there is another, easier way to mark a given bean as primary (without changing the configuration where it is defined).

You can create a configuration in your project, which builds a new data source annotated as #Primary bean. This new data source will be the datasource1, which will be injected by spring to the new data source factory method. Here you have the working example.
The config:
#SpringBootApplication
public class BeanSpringExampleApplication
{
#Bean(name = "dataSource1")
public FakeDataSource dataSource1()
{
return new FakeDataSource("dataSource1");
}
#Bean(name = "dataSource2")
public FakeDataSource dataSource2()
{
return new FakeDataSource("dataSource2");
}
#Bean
#Primary
public FakeDataSource primaryDataSource(
#Qualifier("dataSource1") FakeDataSource dataSource1)
{
return dataSource1;
}
}
Here you see three beans (using FakeDataSource class), which simulate your situation. The primaryDataSource bean factory method simply returns the dataSource1 (it's just a mere data source selector).
The FakeDataSource is just a placeholder, to make example runnable:
public class FakeDataSource
{
private final String fakeProperty;
public FakeDataSource(String id)
{
fakeProperty = id;
}
/**
* #return the fakeProperty
*/
public String getFakeProperty()
{
return fakeProperty;
}
}
Finally, a test which proves everything is working:
#RunWith(SpringRunner.class)
#SpringBootTest
public class BeanSpringExampleApplicationTests
{
#Autowired
private FakeDataSource fakeDataSource;
#Test
public void should_AutowirePrimaryDataSource() throws Exception
{
assertEquals("dataSource1", fakeDataSource.getFakeProperty());
}
}