From 51352c470f98c417bb4ecb9b3150eb9f167bc361 Mon Sep 17 00:00:00 2001 From: Josh Cummings Date: Sat, 1 Dec 2018 00:40:53 -0700 Subject: [PATCH] SQLite with Spring Boot Added custom dialect for SQLite database. Simplify spring-data-rest Configuration Now uses profiles so that learners don't need to uncomment code in order for demonstrations to work. Issue: BAEL-2213 --- spring-data-rest/pom.xml | 11 +++ .../java/com/baeldung/config/DbConfig.java | 26 ++++++- .../com/baeldung/dialect/SQLiteDialect.java | 78 +++++++++++++++++++ .../dialect/SQLiteIdentityColumnSupport.java | 22 ++++++ .../src/main/resources/application.properties | 1 + .../resources/persistence-sqlite.properties | 7 +- 6 files changed, 142 insertions(+), 3 deletions(-) create mode 100644 spring-data-rest/src/main/java/com/baeldung/dialect/SQLiteDialect.java create mode 100644 spring-data-rest/src/main/java/com/baeldung/dialect/SQLiteIdentityColumnSupport.java diff --git a/spring-data-rest/pom.xml b/spring-data-rest/pom.xml index a6f12e1904..2fe4715bac 100644 --- a/spring-data-rest/pom.xml +++ b/spring-data-rest/pom.xml @@ -33,6 +33,15 @@ com.h2database h2 + + org.springframework.boot + spring-boot-autoconfigure + + + org.xerial + sqlite-jdbc + ${sqlite.version} + @@ -43,6 +52,8 @@ + com.baeldung.SpringDataRestApplication + 3.25.2 2.1.0.RELEASE diff --git a/spring-data-rest/src/main/java/com/baeldung/config/DbConfig.java b/spring-data-rest/src/main/java/com/baeldung/config/DbConfig.java index 8d1f9de497..26d882d6a0 100644 --- a/spring-data-rest/src/main/java/com/baeldung/config/DbConfig.java +++ b/spring-data-rest/src/main/java/com/baeldung/config/DbConfig.java @@ -7,6 +7,7 @@ import javax.sql.DataSource; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; +import org.springframework.context.annotation.Profile; import org.springframework.context.annotation.PropertySource; import org.springframework.core.env.Environment; import org.springframework.data.jpa.repository.config.EnableJpaRepositories; @@ -14,11 +15,12 @@ import org.springframework.jdbc.datasource.DriverManagerDataSource; import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean; import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter; -//@Configuration +@Configuration @EnableJpaRepositories(basePackages = "com.baeldung.repositories") // @PropertySource("persistence-h2.properties") // @PropertySource("persistence-hsqldb.properties") // @PropertySource("persistence-derby.properties") +//@PropertySource("persistence-sqlite.properties") public class DbConfig { @Autowired @@ -59,3 +61,25 @@ public class DbConfig { } } + +@Configuration +@Profile("h2") +@PropertySource("persistence-h2.properties") +class H2Config {} + +@Configuration +@Profile("hsqldb") +@PropertySource("persistence-hsqldb.properties") +class HsqldbConfig {} + + +@Configuration +@Profile("derby") +@PropertySource("persistence-derby.properties") +class DerbyConfig {} + + +@Configuration +@Profile("sqlite") +@PropertySource("persistence-sqlite.properties") +class SqliteConfig {} diff --git a/spring-data-rest/src/main/java/com/baeldung/dialect/SQLiteDialect.java b/spring-data-rest/src/main/java/com/baeldung/dialect/SQLiteDialect.java new file mode 100644 index 0000000000..4512f7d34d --- /dev/null +++ b/spring-data-rest/src/main/java/com/baeldung/dialect/SQLiteDialect.java @@ -0,0 +1,78 @@ +package com.baeldung.dialect; + +import org.hibernate.dialect.Dialect; +import org.hibernate.dialect.identity.IdentityColumnSupport; + +import java.sql.Types; + +public class SQLiteDialect extends Dialect { + + public SQLiteDialect() { + 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.BLOB, "blob"); + registerColumnType(Types.CLOB, "clob"); + registerColumnType(Types.BOOLEAN, "integer"); + } + + public IdentityColumnSupport getIdentityColumnSupport() { + return new SQLiteIdentityColumnSupport(); + } + + public boolean hasAlterTable() { + return false; + } + + public boolean dropConstraints() { + return false; + } + + public String getDropForeignKeyString() { + return ""; + } + + public String getAddForeignKeyConstraintString(String constraintName, String[] foreignKey, String referencedTable, String[] primaryKey, boolean referencesPrimaryKey) { + return ""; + } + + public String getAddPrimaryKeyConstraintString(String constraintName) { + return ""; + } + + public String getForUpdateString() { + return ""; + } + + public String getAddColumnString() { + return "add column"; + } + + public boolean supportsOuterJoinForUpdate() { + return false; + } + + public boolean supportsIfExistsBeforeTableName() { + return true; + } + + public boolean supportsCascadeDelete() { + return false; + } +} diff --git a/spring-data-rest/src/main/java/com/baeldung/dialect/SQLiteIdentityColumnSupport.java b/spring-data-rest/src/main/java/com/baeldung/dialect/SQLiteIdentityColumnSupport.java new file mode 100644 index 0000000000..cf6e3a9a97 --- /dev/null +++ b/spring-data-rest/src/main/java/com/baeldung/dialect/SQLiteIdentityColumnSupport.java @@ -0,0 +1,22 @@ +package com.baeldung.dialect; + +import org.hibernate.MappingException; +import org.hibernate.dialect.identity.IdentityColumnSupportImpl; + +public class SQLiteIdentityColumnSupport extends IdentityColumnSupportImpl { + + @Override + public boolean supportsIdentityColumns() { + return true; + } + + @Override + public String getIdentitySelectString(String table, String column, int type) throws MappingException { + return "select last_insert_rowid()"; + } + + @Override + public String getIdentityColumnString(int type) throws MappingException { + return "integer"; + } +} diff --git a/spring-data-rest/src/main/resources/application.properties b/spring-data-rest/src/main/resources/application.properties index e69de29bb2..06cb22a4fe 100644 --- a/spring-data-rest/src/main/resources/application.properties +++ b/spring-data-rest/src/main/resources/application.properties @@ -0,0 +1 @@ +spring.profiles.default=h2 \ No newline at end of file diff --git a/spring-data-rest/src/main/resources/persistence-sqlite.properties b/spring-data-rest/src/main/resources/persistence-sqlite.properties index 018c2cbaca..b6b5f4e4d6 100644 --- a/spring-data-rest/src/main/resources/persistence-sqlite.properties +++ b/spring-data-rest/src/main/resources/persistence-sqlite.properties @@ -1,4 +1,7 @@ driverClassName=org.sqlite.JDBC -url=jdbc:sqlite:memory:myDb +url=jdbc:sqlite:memory:myDb?cache=shared username=sa -password=sa \ No newline at end of file +password=sa +hibernate.dialect=com.baeldung.dialect.SQLiteDialect +hibernate.hbm2ddl.auto=create-drop +hibernate.show_sql=true