data.sql script for a H2 database is executing after my application is running for SpringBoot - spring-boot

Question

I am assuming my data.sql script for a H2 database is executing after my application is running, hence, findById()(CRUD Methods) are not fetching any data(NULL). How can I fix this?
Please find my log details:
2020-10-12 18:52:01.361 INFO 30872 --- [ task-1] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-10-12 18:52:01.491 INFO 30872 --- [ task-1] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.21.Final
2020-10-12 18:52:01.735 INFO 30872 --- [ task-1] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-10-12 18:52:01.956 INFO 30872 --- [ task-1] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
Hibernate: drop table if exists monitoring_app CASCADE
Hibernate: create table monitoring_app (id integer generated by default as identity, grep_parameter varchar(255), service_name varchar(255), hostname varchar(255), log_file_name varchar(255), log_file_path varchar(255), max_failed_retries integer not null, restart_sleep_time_secs integer not null, service_failure char(255), primary key (id))
2020-10-12 18:52:02.982 INFO 30872 --- [ task-1] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-10-12 18:52:02.990 INFO 30872 --- [ task-1] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
Hibernate: select monitoring0_.id as id1_0_, monitoring0_.grep_parameter as grep_par2_0_, monitoring0_.service_name as service_3_0_, monitoring0_.hostname as hostname4_0_, monitoring0_.log_file_name as log_file5_0_, monitoring0_.log_file_path as log_file6_0_, monitoring0_.max_failed_retries as max_fail7_0_, monitoring0_.restart_sleep_time_secs as restart_8_0_, monitoring0_.service_failure as service_9_0_ from monitoring_app monitoring0_ where monitoring0_.hostname=?
list is[]
Hibernate: select monitoring0_.id as id1_0_0_, monitoring0_.grep_parameter as grep_par2_0_0_, monitoring0_.service_name as service_3_0_0_, monitoring0_.hostname as hostname4_0_0_, monitoring0_.log_file_name as log_file5_0_0_, monitoring0_.log_file_path as log_file6_0_0_, monitoring0_.max_failed_retries as max_fail7_0_0_, monitoring0_.restart_sleep_time_secs as restart_8_0_0_, monitoring0_.service_failure as service_9_0_0_ from monitoring_app monitoring0_ where monitoring0_.id=?
Hibernate: insert into monitoring_app (id, grep_parameter, service_name, hostname, log_file_name, log_file_path, max_failed_retries, restart_sleep_time_secs, service_failure) values (null, ?, ?, ?, ?, ?, ?, ?, ?)
2020-10-12 18:52:03.679 INFO 30872 --- [ task-2] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2020-10-12 18:52:03.762 WARN 30872 --- [ restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2020-10-12 18:52:04.283 INFO 30872 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-10-12 18:52:04.286 INFO 30872 --- [ restartedMain] DeferredRepositoryInitializationListener : Triggering deferred initialization of Spring Data repositories…
2020-10-12 18:52:04.287 INFO 30872 --- [ restartedMain] DeferredRepositoryInitializationListener : Spring Data repositories initialized!
2020-10-12 18:52:04.298 INFO 30872 --- [ restartedMain] c.m.automation.AutomationApplication : Started AutomationApplication in 7.785 seconds (JVM running for 8.729)
UPDATE:
Please find my data.sql
INSERT INTO EXAMPLE VALUES(default ,'a','b','c','d','e','f',1,2,'y');
INSERT INTO EXAMPLE VALUES(default ,'g','h','i','j','k','l',2,3,'n');
This is mu dao class
#Component
public class ExampleDao {
#Autowired
ExampleRepository exampleRepository;
public ArrayList<Example> dbFetchDetails(String var)
{
ArrayList<Example> exampleList = new ArrayList<>();
exampleList= exampleRepository.findByVar(var);
return exampleList;
}}
I extend my Repo with CRUDREPOSITORY and define findByVar()
#Repository
public interface ExampleRepository extends CrudRepository<Example, Integer> {
ArrayList<Example> findByVar(String Var);
}
#Entity
public class Example{
#Id #GeneratedValue(strategy= GenerationType.IDENTITY)
private Integer id;
private String a;
private String b;
private String c;
private String d;
private int e;
private int f;
private String g;
private String h;
private Character i;
//getters setters and contructors added
}

Answer 1

So as you said, your #PostConstruct methods are essentially executing before your data.sql executes and fills your local database with data. A simple way around that is to
Remove your #PostConstruct annotations from the methods that need the data.sql to run
Have the classes that have that were using the #PostConstruct methods implement ApplicationListener<ContextRefreshedEvent>
See example below
#Configuration
class InitConfiguration implements ApplicationListener<ContextRefreshedEvent> {
#Override
public void onApplicationEvent(final ContextRefreshedEvent event) {
init();
}
//Your method that had your #PostConstruct annotation
public void init() {
// The code that needs the data.sql to run
}
}