I used spring boot + jdbctemplate, and in my business I have to access multi datasource, e.g.
application.properties
foo.datasource.url=jdbc:mysql://127.0.0.1/foo
foo.datasource.username=root
foo.datasource.password=12345678
bar.datasource.url=jdbc:mysql://127.0.0.1/bar
bar.datasource.username=root
bar.datasource.password=12345678
Java Config
#Bean(name = "fooDb")
#ConfigurationProperties(prefix = "foo.datasource")
public DataSource fooDataSource() {
return DataSourceBuilder.create().build();
}
#Bean(name = "fooJdbcTemplate")
public JdbcTemplate fooJdbcTemplate(#Qualifier("fooDb") DataSource ds) {
return new JdbcTemplate(ds);
}
and there are some common configuration for all datasources
spring.datasource.test-while-idle=true
spring.datasource.time-between-eviction-runs-millis=30000
spring.datasource.validation-query=select 1
How could I populate these common properties to every jdbctemplate, e.g.
#Bean(name = "commonDb")
#ConfigurationProperties(prefix = "spring.datasource")
public DataSource commonDataSource() {
return DataSourceBuilder.create().build();
}
Now my way is
#Value("${spring.datasource.test-while-idle}")
private boolean testWhileIdle;
#Value("${spring.datasource.time-between-eviction-runs-millis}")
private int timeBetweenEvictionRunsMillis;
#Value("${spring.datasource.validation-query}")
private String validationQuery;
private DataSource commonProcess(DataSource build) {
org.apache.tomcat.jdbc.pool.DataSource ds = (org.apache.tomcat.jdbc.pool.DataSource) build;
ds.setTestWhileIdle(testWhileIdle);
ds.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
ds.setValidationQuery(validationQuery);
return build;
}
#Bean(name = "fooDb")
#ConfigurationProperties(prefix = "foo.datasource")
public DataSource fooDataSource() {
return commonProcess(DataSourceBuilder.create().build());
}
Related
My application.properties
spring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.username=${env.H2_USER}
spring.datasource.password=${env.H2_PASS}
spring.token-datasource.url=jdbc:mysql://${env.MYSQL_HOST}/${env.MYSQL_DB}
spring.token-datasource.username=${env.MYSQL_USER}
spring.token-datasource.password=${env.MYSQL_PASS}
My Configuration.java code snippet
#Configuration
public class DataSourceConfiguration {
#Bean
#Primary
#ConfigurationProperties(prefix = "spring.datasource")
public DataSource regularDataSource() {
DataSource dataSource = DataSourceBuilder.create().build();
return dataSource;
}
#Bean
#ConfigurationProperties(prefix = "spring.token-datasource")
public DataSource tokenDataSource() {
DataSource dataSource = DataSourceBuilder.create().build();
return dataSource;
}
}
However, if I put a break point at each of return dataSource;, I see the DataSource object not populated with the correponding property values, e.g. jdbcUrl would be null.
Any help?
Thanks!
Followed https://docs.spring.io/spring-boot/docs/2.4.2/reference/html/howto.html#howto-two-datasources and crafted following code which works:
#Configuration
public class DataSourceConfiguration {
#Bean
#Primary
#ConfigurationProperties("spring.datasource")
public DataSourceProperties regularDataSourceProperties() {
return new DataSourceProperties();
}
#Bean
#Primary
#ConfigurationProperties("spring.datasource.configuration")
public HikariDataSource regularDataSource() {
HikariDataSource dataSource = regularDataSourceProperties().initializeDataSourceBuilder()
.type(HikariDataSource.class).build();
return dataSource;
}
#Bean
#ConfigurationProperties("spring.token-datasource")
public DataSourceProperties tokenDataSourceProperties() {
return new DataSourceProperties();
}
#Bean
#ConfigurationProperties("spring.token-datasource.configuration")
public DataSource tokenDataSource() {
DataSource dataSource = tokenDataSourceProperties().initializeDataSourceBuilder().build();
return dataSource;
}
}
It's interesting that the original code snippet does NOT work, while it's still the approach recommened by many Java tutorials and stackoverflow posts. For example,
https://www.baeldung.com/spring-data-jpa-multiple-databases
Spring Boot Configure and Use Two DataSources
Im new to spring framework and I Want to migrate data from One DB to another using Spring boot n Batch
Im trying to read from an Mysql db with an item reader and write it to an Oracle db using an item writer of the same job.
Im able to read the data from the Mysql db but unable to write it to Oracle Db as the writer is trying it write it in Mysql Db itself.
Im not sure why the connection is not switching to Oracle db.
Please help me over here what im doing wrong.
Application properties
server.port=8082
spring.batch.job.enabled= false
spring.datasource.url = jdbc:mysql://localhost:3306/projectdb1
spring.datasource.username = root
spring.datasource.password = Mech_2015
spring.datasource.driverClassName = com.mysql.jdbc.Driver
#second db2 ...
db2.datasource.url = jdbc:oracle:thin:#localhost:1521:xe
db2.datasource.username = system
db2.datasource.password = Mech_2015
db2.datasource.driverClassName = oracle.jdbc.driver.OracleDriver
Entity Managers
package com.techprimers.springbatchexample1.entity.manger;
#Configuration
#EnableJpaRepositories(entityManagerFactoryRef = "radiusEntityManager", transactionManagerRef = "radiusTransactionManager", basePackages = "com.techprimers.springbatchexample1.repository.userrepo")
public class RadiusConfig {
private final PersistenceUnitManager persistenceUnitManager;
public RadiusConfig(ObjectProvider<PersistenceUnitManager> persistenceUnitManager) {
this.persistenceUnitManager = persistenceUnitManager.getIfAvailable();
}
#Bean
#ConfigurationProperties("spring.jpa")
public JpaProperties radiusJpaProperties() {
return new JpaProperties();
}
#Bean
#Primary
#ConfigurationProperties("spring.datasource")
public DataSourceProperties radiusDataSourceProperties() {
return new DataSourceProperties();
}
#Bean
#ConfigurationProperties(prefix = "spring.datasource.properties")
public DataSource radiusDataSource() {
return (DataSource) radiusDataSourceProperties().initializeDataSourceBuilder().type(DataSource.class).build();
}
#Bean(name = "radiusEntityManager")
public LocalContainerEntityManagerFactoryBean radiusEntityManager(JpaProperties radiusJpaProperties) {
EntityManagerFactoryBuilder builder = createEntityManagerFactoryBuilder(radiusJpaProperties);
return builder.dataSource(radiusDataSource()).packages(User.class).persistenceUnit("userDs").build();
}
#Bean
public JpaTransactionManager radiusTransactionManager(EntityManagerFactory radiusEntityManager) {
return new JpaTransactionManager(radiusEntityManager);
}
private EntityManagerFactoryBuilder createEntityManagerFactoryBuilder(JpaProperties radiusJpaProperties) {
JpaVendorAdapter jpaVendorAdapter = createJpaVendorAdapter(radiusJpaProperties);
return new EntityManagerFactoryBuilder(jpaVendorAdapter, radiusJpaProperties.getProperties(),
this.persistenceUnitManager);
}
private JpaVendorAdapter createJpaVendorAdapter(JpaProperties jpaProperties) {
AbstractJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
adapter.setShowSql(jpaProperties.isShowSql());
adapter.setDatabase(jpaProperties.getDatabase());
adapter.setDatabasePlatform(jpaProperties.getDatabasePlatform());
adapter.setGenerateDdl(jpaProperties.isGenerateDdl());
return adapter;
}
}
package com.techprimers.springbatchexample1.entity.manger;
#Configuration
#EnableJpaRepositories(entityManagerFactoryRef = "esbEntityManager", transactionManagerRef = "esbDetailsTransactionManager", basePackages = "com.techprimers.springbatchexample1.repository.userdetails")
public class EsbConfig {
private final PersistenceUnitManager persistenceUnitManager;
public EsbConfig(ObjectProvider<PersistenceUnitManager> persistenceUnitManager) {
this.persistenceUnitManager = persistenceUnitManager.getIfAvailable();
}
#Bean
#ConfigurationProperties("db2.jpa")
public JpaProperties esbJpaProperties() {
return new JpaProperties();
}
#Bean
#ConfigurationProperties("db2.datasource")
public DataSourceProperties esbDataSourceProperties() {
return new DataSourceProperties();
}
#Bean
#ConfigurationProperties(prefix = "db2.datasource.properties")
public DataSource esbDataSource() {
return (DataSource) esbDataSourceProperties().initializeDataSourceBuilder().type(DataSource.class).build();
}
#Bean(name = "esbEntityManager")
public LocalContainerEntityManagerFactoryBean esbEntityManager(JpaProperties esbJpaProperties) {
EntityManagerFactoryBuilder builder = createEntityManagerFactoryBuilder(esbJpaProperties);
return builder.dataSource(esbDataSource()).packages(UserDetails.class).persistenceUnit("userDetailDs").build();
}
#Bean
public JpaTransactionManager esbTransactionManager(EntityManagerFactory esbEntityManager) {
return new JpaTransactionManager(esbEntityManager);
}
private EntityManagerFactoryBuilder createEntityManagerFactoryBuilder(JpaProperties esbJpaProperties) {
JpaVendorAdapter jpaVendorAdapter = createJpaVendorAdapter(esbJpaProperties);
return new EntityManagerFactoryBuilder(jpaVendorAdapter, esbJpaProperties.getProperties(),
this.persistenceUnitManager);
}
private JpaVendorAdapter createJpaVendorAdapter(JpaProperties jpaProperties) {
AbstractJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
adapter.setShowSql(jpaProperties.isShowSql());
adapter.setDatabase(jpaProperties.getDatabase());
adapter.setDatabasePlatform(jpaProperties.getDatabasePlatform());
adapter.setGenerateDdl(jpaProperties.isGenerateDdl());
return adapter;
}
}
Batch Config
package com.techprimers.springbatchexample1.config;
#Configuration
#EnableBatchProcessing
public class SpringBatchConfig {
private static final Logger LOGGER = LoggerFactory.getLogger(SpringBatchConfig.class);
#Bean
#Primary
#Qualifier("radiusDatasource")
#ConfigurationProperties(prefix = "spring.datasource")
DataSource mysqlDataSource() {
return DataSourceBuilder.create().build();
}
#Bean
#ConfigurationProperties(prefix = "db2.datasource")
#Qualifier("esbDatasource")
DataSource oracleDataSource() {
return DataSourceBuilder.create().build();
}
#Bean
public InspectionProcessor processor() {
return new InspectionProcessor();
}
#Bean
public JdbcCursorItemReader<User> reader() {
JdbcCursorItemReader<User> cursorItemReader = new JdbcCursorItemReader<>();
cursorItemReader.setDataSource(mysqlDataSource());
cursorItemReader.setSql("SELECT ID,CNAME,SID,CREATEDDATE,COMPLETEDDATE FROM INSPECTION");
cursorItemReader.setRowMapper(new InspectionDetailRowmapper());
return cursorItemReader;
}
private static final String QUERY_INSERT_STUDENT = "INSERT "
+ "INTO inspect(id,cname,completeddate,createddate,lastupdateddate,sid) " + "VALUES (?,?,?,?,?,?)";
#Bean
ItemWriter<UserDetails> databaseItemWriter(DataSource dataSource, NamedParameterJdbcTemplate jdbcTemplate) {
LOGGER.info("Starting writer");
JdbcBatchItemWriter<UserDetails> databaseItemWriter = new JdbcBatchItemWriter<>();
databaseItemWriter.setDataSource(oracleDataSource());
databaseItemWriter.setJdbcTemplate(jdbcTemplate);
LOGGER.info(" writer");
databaseItemWriter.setSql(QUERY_INSERT_STUDENT)
ItemPreparedStatementSetter<UserDetails> valueSetter = new UserDetailsPreparedStatementSetter();
databaseItemWriter.setItemPreparedStatementSetter(valueSetter);
return databaseItemWriter;
}
#Bean
Step dataMigrationStep(ItemReader<User> reader, ItemProcessor<User, UserDetails> processor,
ItemWriter<UserDetails> databsaeItemWriter, StepBuilderFactory stepBuilderFactory) {
return stepBuilderFactory.get("dataMigrationStep").<User, UserDetails>chunk(5).reader(reader)
.processor(processor).writer(databsaeItemWriter).build();
}
#Bean
Job dataMigrationJob(JobBuilderFactory jobBuilderFactory, #Qualifier("dataMigrationStep") Step dataMigrationStep) {
return jobBuilderFactory.get("csvFileToDatabaseJob").incrementer(new RunIdIncrementer()).flow(dataMigrationStep)
.end().build();
}
}
Your writer does not inject properly the database where to write your data
this
#Bean
ItemWriter<UserDetails> databaseItemWriter(DataSource dataSource, NamedParameterJdbcTemplate jdbcTemplate)
instead of
#Bean
ItemWriter<UserDetails> databaseItemWriter(#Qualifier("esbDatasource") DataSource dataSource, NamedParameterJdbcTemplate jdbcTemplate)
I have a multi database application. Users can select the database on the login page.
Then the database is routing selected database thanks for AbstractRoutingDataSource from Spring.
I want to use HikariCP, but it needs dataSourceUrl. But my Datasource URL changes dynamically. How can I configure Hikaricp for multiple databases?
File application.properties:
#database1 properties
app.database1.connection.url = url1
app.database1.connection.username = sameusername
app.database1.connection.password = samepassword
#database2 properties
app.database2.connection.url = url2
app.database2.connection.username = sameusername
app.database2.connection.password = samepassword
My Datasource configuration class example:
public class DataSourceConfiguration {
#Autowired(required = false)
private PersistenceUnitManager persistenceUnitManager;
#Bean
#ConfigurationProperties(prefix = "app.database1.connection")
public DataSource database1DataSource() {
return DataSourceBuilder.create().build();
}
#Bean
#ConfigurationProperties(prefix = "app.database2.connection")
public DataSource database2DataSource() {
return DataSourceBuilder.create().build();
}
#Bean
#Primary
public DataSource appDataSource() {
DataSourceRouter router = new DataSourceRouter();
final HashMap<Object, Object> map = new HashMap<>(3);
map.put(DatabaseEnvironment.DATABASE1, database1DataSource());
map.put(DatabaseEnvironment.DATABASE2, database2DataSource());
router.setTargetDataSources(map);
return router;
}
#Bean
#Primary
#ConfigurationProperties("app.connection.jpa")
public JpaProperties appJpaProperties() {
return new JpaProperties();
}
private JpaVendorAdapter createJpaVendorAdapter(JpaProperties jpaProperties) {
AbstractJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
adapter.setShowSql(jpaProperties.isShowSql());
adapter.setDatabase(jpaProperties.getDatabase());
adapter.setDatabasePlatform(jpaProperties.getDatabasePlatform());
adapter.setGenerateDdl(jpaProperties.isGenerateDdl());
return adapter;
}
My session scoped class instead of context holder:
#Component
#Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)
public class PreferredDatabaseSession implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private DatabaseEnvironment preferredDb;
public DatabaseEnvironment getPreferredDb() {
return preferredDb;
}
public void setPreferredDb(DatabaseEnvironment preferredDb) {
this.preferredDb = preferredDb;
}
}
If I understand your requirement correctly, you intend to define two data sources and for a given request you want to route your queries to a particular data source based on some condition.
The solution is:
File application.properties
#database1 properties
app.database1.connection.url = url1
app.database1.connection.username = username1
app.database1.connection.password = password1
#database2 properties
app.database2.connection.url = url2
app.database2.connection.username = username2
app.database2.connection.password = password2
#default
default.datasource.key=dataSource1
File CommonRoutingDataSource.java
public class CommonRoutingDataSource extends AbstractRoutingDataSource {
#Override
protected Object determineCurrentLookupKey() {
return DataSourceContextHolder.getDataSourceName();
}
public void initDataSources(final DataSource dataSource1, final DataSource dataSource2,
final String defaultDataSourceKey) {
final Map<Object, Object> dataSourceMap = new HashMap<Object, Object>();
dataSourceMap.put("dataSource1", dataSource1);
dataSourceMap.put("dataSource2", dataSource2);
this.setDefaultTargetDataSource(dataSourceMap.get(defaultDataSourceKey));
this.setTargetDataSources(dataSourceMap);
}
}
File DataSourceContextHolder.java
public class DataSourceContextHolder {
private static final ThreadLocal<String> contextHolder = new ThreadLocal<>();
private DataSourceContextHolder() {
// Private no-op constructor
}
public static final void setDataSourceName(final String dataSourceName) {
Assert.notNull(dataSourceName, "dataSourceName cannot be null");
contextHolder.set(dataSourceName);
}
public static final String getDataSourceName() {
return contextHolder.get();
}
public static final void clearDataSourceName() {
contextHolder.remove();
}
}
File DataSourceConfig.java
public class DataSourceConfig {
#Autowired
private Environment env;
#Autowired
#Bean(name = "dataSource")
public DataSource getDataSource(final DataSource dataSource1, final DataSource dataSource2) {
final CommonRoutingDataSource dataSource = new CommonRoutingDataSource();
dataSource.initDataSources(dataSource1, dataSource2, env.getProperty("default.datasource.key"));
return dataSource;
}
#Bean(name = "dataSource1")
public DataSource getDataSource1() throws SQLException {
// The exact DataSource class imported shall be as per your requirement - HikariCP, or Tomcat etc.
final DataSource dataSource = new DataSource();
dataSource.setDriverClassName();
dataSource.setUrl(env.getProperty("app.database1.connection.url"));
// Set all data source attributes from the application.properties file
return dataSource;
}
#Bean(name = "dataSource2")
public DataSource getDataSource2() throws SQLException {
// The exact DataSource class imported shall be as per your requirement - HikariCP, or Tomcat etc.
final DataSource dataSource = new DataSource();
dataSource.setDriverClassName();
dataSource.setUrl(env.getProperty("app.database2.connection.url"));
// set all data source attributes from the application.properties file
return dataSource;
}
}
Now, somewhere in your code (either an Aspect or Controller), you need to dynamically set the data source conditionally:
DataSourceContextHolder.setDataSourceName("dataSource1");
Note: It's better to declare the data source names as enums rather than strings "dataSource1", "dataSource2", etc.
The below snippet works for me
first.datasource.jdbc-url=jdbc-url
first.datasource.username=username
first.datasource.password=password
.
.
.
.
=================== In Java Configuration File ==================
#Primary
#Bean(name = "firstDataSource")
#ConfigurationProperties(prefix = "first.datasource")
public DataSource dataSource() {
return DataSourceBuilder.create().build();
}
#Primary
#Bean(name = "firstEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean barEntityManagerFactory(EntityManagerFactoryBuilder builder,
#Qualifier("firstDataSource") DataSource dataSource) {
Map<String, String> props = new HashMap<String, String>();
props.put("spring.jpa.database-platform", "org.hibernate.dialect.Oracle12cDialect");
.
.
.
return builder.dataSource(dataSource).packages("com.first.entity").persistenceUnit("firstDB")
.properties(props)
.build();
}
#Primary
#Bean(name = "firstTransactionManager")
public PlatformTransactionManager firstTransactionManager(
#Qualifier("firstEntityManagerFactory") EntityManagerFactory firstEntityManagerFactory) {
return new JpaTransactionManager(firstEntityManagerFactory);
}
second.datasource.jdbc-url=jdbc-url
second.datasource.username=username
second.datasource.password=password
.
.
.
.
=================== In Java Configuration File ==================
#Bean(name = "secondDataSource")
#ConfigurationProperties(prefix = "second.datasource")
public DataSource dataSource() {
return DataSourceBuilder.create().build();
}
#Bean(name = "secondEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean barEntityManagerFactory(EntityManagerFactoryBuilder builder,
#Qualifier("secondDataSource") DataSource dataSource) {
Map<String, String> props = new HashMap<String, String>();
props.put("spring.jpa.database-platform", "org.hibernate.dialect.Oracle12cDialect");
.
.
.
return builder.dataSource(dataSource).packages("com.second.entity").persistenceUnit("secondDB")
.properties(props)
.build();
}
#Bean(name = "secondTransactionManager")
public PlatformTransactionManager secondTransactionManager(
#Qualifier("secondEntityManagerFactory") EntityManagerFactory secondEntityManagerFactory) {
return new JpaTransactionManager(secondEntityManagerFactory);
}
How do I configure 2 jdbc connections using Spring4 java config classes ?
Should 2 transaction managers be configure for those two connections ?
Thx
Edit:
I'm want to use just JdbcTemplate no JPA, Spring Data.
Example configuration might looks something like the following. I also pushed a full sample to GitHub which can be found here
#Configuration
public class DataSourceConfiguration {
#Bean
public PlatformTransactionManager firstDataSourceTransactionManager() {
return new DataSourceTransactionManager(firstDataSource());
}
#Bean(destroyMethod = "shutdown")
#Primary
public DataSource firstDataSource() {
return new EmbeddedDatabaseBuilder()
.setType(EmbeddedDatabaseType.H2)
.generateUniqueName(true)
.build();
}
#Bean
public JdbcTemplate firstJdbcTemplate() {
return new JdbcTemplate(firstDataSource());
}
#Bean
public PlatformTransactionManager secondDataSourceTransactionManager() {
return new DataSourceTransactionManager(secondDataSource());
}
#Bean(destroyMethod = "shutdown")
public DataSource secondDataSource() {
return new EmbeddedDatabaseBuilder()
.setType(EmbeddedDatabaseType.H2)
.generateUniqueName(true)
.build();
}
#Bean
public JdbcTemplate secondJdbcTemplate() {
return new JdbcTemplate(secondDataSource());
}
}
I am following this link
https://github.com/kwon37xi/replication-datasource
I have implemented the code But STILL Both my service functions are using the same Database(one which is marked primary)
Service Class
public class TableService{
#Autowired
private Table1Repo t1Repo;
#Transactional(readOnly = false)
public void saveTable1(Table1 t,int a, Table1 t2){
try{
t1Repo.save(t2);
}
catch(Exception e){
System.out.println("Inside");
}
}
#Transactional(readOnly = true)
public Table1 getTable(int id){
return t1Repo.findOne(id);
}
}
Then Added two Class(from the link)
ReplicationRoutingDataSource
public class ReplicationRoutingDataSource extends AbstractRoutingDataSource {
#Override
protected Object determineCurrentLookupKey() {
String dataSourceType = TransactionSynchronizationManager.isCurrentTransactionReadOnly() ? "read" : "write";
return dataSourceType;
}
}
WithRoutingDataSourceConfig
#Configuration
public class WithRoutingDataSourceConfig {
/*#Bean(destroyMethod = "shutdown")*/
#Bean
#Primary
#ConfigurationProperties(prefix="datasource.primary")
public DataSource writeDataSource() {
/* EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder()
.setName("routingWriteDb")
.setType(EmbeddedDatabaseType.H2)
.setScriptEncoding("UTF-8")
.addScript("classpath:/writedb.sql");
return builder.build();*/
return DataSourceBuilder.create().build();
}
/* #Bean(destroyMethod = "shutdown")*/
#Bean
#ConfigurationProperties(prefix="datasource.secondary")
public DataSource readDataSource() {
/*EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder()
.setName("routingReadDb")
.setType(EmbeddedDatabaseType.H2)
.setScriptEncoding("UTF-8")
.addScript("classpath:/readdb.sql");
return builder.build();*/
return DataSourceBuilder.create().build();
}
/**
* {#link org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource}는
* {#link org.springframework.beans.factory.InitializingBean}을 구현하므로,
* 명시적으로 afterPropertiesSet()메소드를 호출하거나
* 별도 #Bean으로 만들어 Spring Life Cycle을 타도록 해야 한다.
*/
#Bean
public DataSource routingDataSource(#Qualifier("writeDataSource") DataSource writeDataSource, #Qualifier("readDataSource") DataSource readDataSource) {
ReplicationRoutingDataSource routingDataSource = new ReplicationRoutingDataSource();
Map<Object, Object> dataSourceMap = new HashMap<Object, Object>();
dataSourceMap.put("write", writeDataSource);
dataSourceMap.put("read", readDataSource);
routingDataSource.setTargetDataSources(dataSourceMap);
routingDataSource.setDefaultTargetDataSource(writeDataSource);
return routingDataSource;
}
/**
* {#link org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy}로 감싸서
* 트랜잭션 동기화가 이루어진 뒤에 실제 커넥션을 확보하도록 해준다.
*
* #param routingDataSource
* #return
*/
#Bean
public DataSource dataSource(#Qualifier("routingDataSource") DataSource routingDataSource) {
return new LazyConnectionDataSourceProxy(routingDataSource);
}
}
application.prop file
server.port=8089
spring.jpa.show-sql = true
spring.jpa.properties.hibernate.show_sql=true
# Primary DataSource configuration
datasource.primary.url=jdbc:mysql://127.0.0.1:3306/jpa
datasource.primary.username=root
datasource.primary.password=root
# Any of the other Spring supported properties below...
# Secondary DataSource configuration
datasource.secondary.url=jdbc:mysql://127.0.0.1:3306/jpa2
datasource.secondary.username=root
datasource.secondary.password=root
Repository
public interface Table1Repo extends JpaRepository<Table1, Integer>{}
Issue is my both service functions are using the primary Database. What am I missing. I only have these class. Rest I have one Controller
Edited
I have made by code work by adding this class
#Configuration
#EnableTransactionManagement
#EnableJpaRepositories(basePackages="com.example")
public class ReplicationDataSourceApplicationConfig {
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory(#Qualifier("dataSource") DataSource dataSource) {
LocalContainerEntityManagerFactoryBean emfb = new LocalContainerEntityManagerFactoryBean();
emfb.setDataSource(dataSource);
emfb.setPackagesToScan("com.example");
HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
emfb.setJpaVendorAdapter(jpaVendorAdapter);
return emfb;
}
#Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory);
return transactionManager;
}
#Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslationPostProcessor() {
return new PersistenceExceptionTranslationPostProcessor();
}
}
I'm the writer of the link you refered.
Which data source do you use with Table1Repo?
You have to inject the specific bean "dataSource" to you JDBC call.
I guess #Primary "writeDataSource" is injected to your Repository.
Try to change #Primary to "dataSource" or find a way to inject "dataSource" to your repository.
you can also try in this way:
Spring Boot 2 with Multiple DataSource for Postgres Data Replication
and here is source code in github:
spring-boot-multi-data-source
The following link explans, how you can have multiple datasource
DB1 (write):
#Configuration
#ConfigurationProperties("spring.datasource-write")
#EnableTransactionManagement
#EnableJpaRepositories(
entityManagerFactoryRef = "entityManagerFactoryWrite",
transactionManagerRef = "transactionManagerWrite",
basePackages = {"com.ehsaniara.multidatasource.repository.writeRepository"}
)
public class DataSourceConfigWrite extends HikariConfig {
public final static String PERSISTENCE_UNIT_NAME = "write";
#Bean
public HikariDataSource dataSourceWrite() {
return new HikariDataSource(this);
}
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactoryWrite(
final HikariDataSource dataSourceWrite) {
return new LocalContainerEntityManagerFactoryBean() {{
setDataSource(dataSourceWrite);
setPersistenceProviderClass(HibernatePersistenceProvider.class);
setPersistenceUnitName(PERSISTENCE_UNIT_NAME);
setPackagesToScan(MODEL_PACKAGE);
setJpaProperties(JPA_PROPERTIES);
}};
}
#Bean
public PlatformTransactionManager transactionManagerWrite(EntityManagerFactory entityManagerFactoryWrite) {
return new JpaTransactionManager(entityManagerFactoryWrite);
}
}
DB2 (read):
#Configuration
#ConfigurationProperties("spring.datasource-read")
#EnableTransactionManagement
#EnableJpaRepositories(
entityManagerFactoryRef = "entityManagerFactoryRead",
transactionManagerRef = "transactionManagerRead",
basePackages = {"com.ehsaniara.multidatasource.repository.readRepository"}
)
public class DataSourceConfigRead extends HikariConfig {
public final static String PERSISTENCE_UNIT_NAME = "read";
#Bean
public HikariDataSource dataSourceRead() {
return new HikariDataSource(this);
}
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactoryRead(
final HikariDataSource dataSourceRead) {
return new LocalContainerEntityManagerFactoryBean() {{
setDataSource(dataSourceRead);
setPersistenceProviderClass(HibernatePersistenceProvider.class);
setPersistenceUnitName(PERSISTENCE_UNIT_NAME);
setPackagesToScan(MODEL_PACKAGE);
setJpaProperties(JPA_PROPERTIES);
}};
}
#Bean
public PlatformTransactionManager transactionManagerRead(EntityManagerFactory entityManagerFactoryRead) {
return new JpaTransactionManager(entityManagerFactoryRead);
}
}