Implementation of CustomSqlChange in Liquibase is not working - spring-boot

Question

I have a requirement to implement CustomSqlChange interface while my liquibase script runs. Following is my yaml changeSet entry:
changeSet:
customChange:
param:
_name: file
_value: "/com/example/data/user.csv"
_class: "com.example.MyClass"
id: id
author: abj
failOnError: true
Implementation for MyClass is as follows:
package com.example;
import liquibase.change.custom.CustomSqlChange;
import liquibase.change.custom.CustomSqlRollback;
import liquibase.database.Database;
import liquibase.exception.CustomChangeException;
import liquibase.exception.RollbackImpossibleException;
import liquibase.exception.SetupException;
import liquibase.exception.ValidationErrors;
import liquibase.resource.ResourceAccessor;
import liquibase.statement.SqlStatement;
public class MyClass implements CustomSqlChange, CustomSqlRollback {
//to hold the parameter value
private String file;
private ResourceAccessor resourceAccessor;
#Override
public String getConfirmationMessage() {
return "Confirmation Message from Custom SQL Change";
}
#Override
public void setUp() throws SetupException {
}
#Override
public void setFileOpener(ResourceAccessor resourceAccessor) {
this.resourceAccessor = resourceAccessor;
}
public String getFile() {
return file;
}
public void setFile(String file) {
this.file = file;
}
#Override
public ValidationErrors validate(Database database) {
return null;
}
#Override
public SqlStatement[] generateStatements(Database database) throws CustomChangeException {
return null;
}
#Override
public SqlStatement[] generateRollbackStatements(Database database)
throws CustomChangeException, RollbackImpossibleException {
return null;
}}
My Normal liquibase script runs successfully. I have a breakpoint in generateStatements method but the flow never comes to the breakpoint. Neither do any loggers are printed for the particular changeset at the time of application startup. Am I missing on to something?

Answer 1

Got it working with a slight change.
Implemented CustomTaskChange instead of CustomSqlChange.
Plus needed a parameter named changeId for some internal business logic.
The code is as follows:
yaml ChangeSet entry:
- changeSet:
id: id
author: abj
changes:
- customChange:
class: com.example.MyClass
params:
- param:
name: changeId
value: id
And Code for MyClass is:
package com.example;
import liquibase.change.custom.CustomTaskChange;
import liquibase.database.Database;
import liquibase.exception.CustomChangeException;
import liquibase.exception.SetupException;
import liquibase.exception.ValidationErrors;
import liquibase.resource.ResourceAccessor;
public class MyClass implements CustomTaskChange {
private String changeId;
public String getChangeId() {
return changeId;
}
public void setChangeId(String changeId) {
this.changeId = changeId;
}
#Override
public String getConfirmationMessage() {
return "Custom Task Change for "+this.getClass();
}
#Override
public void setUp() throws SetupException {
}
#Override
public void setFileOpener(ResourceAccessor resourceAccessor) {
}
#Override
public ValidationErrors validate(Database database) {
return null;
}
#Override
public void execute(Database database) throws CustomChangeException {
System.out.println("Code Flow comes Here");
}}