In my Spring boot application I have the dependency for sqlite jdbc driver specified:
<dependency>
<groupId>org.xerial</groupId>
<artifactId>sqlite-jdbc</artifactId>
<version>3.34.0</version>
</dependency>
and in pom.xml properties
<hibernate.version>5.1.0.Final</hibernate.version>
and have the below in my application.properties:
spring.jpa.database-platform=com.springboot.sqlite.SQLDialect
spring.jpa.hibernate.ddl-auto=update
spring.jpa.defer-datasource-initialization = true
spring.datasource.url = jdbc:sqlite:cryptobot.db
spring.datasource.driver-class-name = org.sqlite.JDBC
But running the application fails with
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: org.sqlite.JDBC
What is going wrong here?
CodePudding user response:
Since, Hibernate doesn't ship with a Dialect for SQLite, you can follow the paths below:
1. Create your own dialect class by extending Dialect.
import java.sql.Types;
import org.hibernate.dialect.Dialect;
public class SQLiteDialect extends Dialect {
public SQLiteDialect() {
super();
registerColumnType(Types.BIT, "integer");
registerColumnType(Types.TINYINT, "tinyint");
registerColumnType(Types.SMALLINT, "smallint");
registerColumnType(Types.INTEGER, "integer");
registerColumnType(Types.BIGINT, "bigint");
registerColumnType(Types.FLOAT, "float");
registerColumnType(Types.REAL, "real");
registerColumnType(Types.DOUBLE, "double");
registerColumnType(Types.NUMERIC, "numeric");
registerColumnType(Types.DECIMAL, "decimal");
registerColumnType(Types.CHAR, "char");
registerColumnType(Types.VARCHAR, "varchar");
.
.
.
}
}
Click for the complete example.
2. You can use 3rd party dialects.
For Hibernate 5 add the dependency:
<dependency>
<groupId>com.github.gwenn</groupId>
<artifactId>sqlite-dialect</artifactId>
<version>0.1.2</version>
</dependency>
and the configuration:
hibernate.dialect=org.sqlite.hibernate.dialect.SQLiteDialect
CodePudding user response:
I tried to replicate this in my local machine and here the solution.
You have to create your own dilect by extending org.hibernate.dialect
package com.mehul.SQLiteDemo.dialect;
import java.sql.Types;
import org.hibernate.dialect.Dialect;
import org.hibernate.dialect.function.SQLFunctionTemplate;
import org.hibernate.dialect.function.StandardSQLFunction;
import org.hibernate.dialect.function.VarArgsSQLFunction;
import org.hibernate.type.StringType;
public class SQLDialect extends Dialect {
public SQLDialect() {
registerColumnType(Types.BIT, "integer");
registerColumnType(Types.TINYINT, "tinyint");
registerColumnType(Types.SMALLINT, "smallint");
registerColumnType(Types.INTEGER, "integer");
registerColumnType(Types.BIGINT, "bigint");
registerColumnType(Types.FLOAT, "float");
registerColumnType(Types.REAL, "real");
registerColumnType(Types.DOUBLE, "double");
registerColumnType(Types.NUMERIC, "numeric");
registerColumnType(Types.DECIMAL, "decimal");
registerColumnType(Types.CHAR, "char");
registerColumnType(Types.VARCHAR, "varchar");
registerColumnType(Types.LONGVARCHAR, "longvarchar");
registerColumnType(Types.DATE, "date");
registerColumnType(Types.TIME, "time");
registerColumnType(Types.TIMESTAMP, "timestamp");
registerColumnType(Types.BINARY, "blob");
registerColumnType(Types.VARBINARY, "blob");
registerColumnType(Types.LONGVARBINARY, "blob");
// registerColumnType(Types.NULL, "null");
registerColumnType(Types.BLOB, "blob");
registerColumnType(Types.CLOB, "clob");
registerColumnType(Types.BOOLEAN, "integer");
registerFunction("concat", new VarArgsSQLFunction(StringType.INSTANCE, "", "||", ""));
registerFunction("mod", new SQLFunctionTemplate(StringType.INSTANCE, "?1 % ?2"));
registerFunction("substr", new StandardSQLFunction("substr", StringType.INSTANCE));
registerFunction("substring", new StandardSQLFunction("substr", StringType.INSTANCE));
}
public boolean supportsIdentityColumns() {
return true;
}
public boolean hasDataTypeInIdentityColumn() {
return false; // As specify in NHibernate dialect
}
public String getIdentityColumnString() {
// return "integer primary key autoincrement";
return "integer";
}
public String getIdentitySelectString() {
return "select last_insert_rowid()";
}
public boolean supportsLimit() {
return true;
}
protected String getLimitString(String query, boolean hasOffset) {
return new StringBuffer(query.length() 20).append(query).append(hasOffset ? " limit ? offset ?" : " limit ?")
.toString();
}
public boolean supportsTemporaryTables() {
return true;
}
public String getCreateTemporaryTableString() {
return "create temporary table if not exists";
}
public boolean dropTemporaryTableAfterUse() {
return false;
}
public boolean supportsCurrentTimestampSelection() {
return true;
}
public boolean isCurrentTimestampSelectStringCallable() {
return false;
}
public String getCurrentTimestampSelectString() {
return "select current_timestamp";
}
public boolean supportsUnionAll() {
return true;
}
public boolean hasAlterTable() {
return false; // As specify in NHibernate dialect
}
public boolean dropConstraints() {
return false;
}
public String getAddColumnString() {
return "add column";
}
public String getForUpdateString() {
return "";
}
public boolean supportsOuterJoinForUpdate() {
return false;
}
public String getDropForeignKeyString() {
throw new UnsupportedOperationException("No drop foreign key syntax supported by SQLiteDialect");
}
public String getAddForeignKeyConstraintString(String constraintName, String[] foreignKey, String referencedTable,
String[] primaryKey, boolean referencesPrimaryKey) {
throw new UnsupportedOperationException("No add foreign key syntax supported by SQLiteDialect");
}
public String getAddPrimaryKeyConstraintString(String constraintName) {
throw new UnsupportedOperationException("No add primary key syntax supported by SQLiteDialect");
}
public boolean supportsIfExistsBeforeTableName() {
return true;
}
public boolean supportsCascadeDelete() {
return false;
}
}
Also update spring.jpa.database-platform=com.mehul.SQLiteDemo.dialect.SQLDialect
with your package and classname.
Note : I used <hibernate.version>5.6.3.Final</hibernate.version>