在solution here之后，我想为我的应用程序（两个SQL Server）添加两个额外的数据源。我的设置是：
JdbcTemplate）的SQL Server数据源。这些是read-only数据库，我只需要在它们上运行查询。因此，我生成了一个新的JHipster Monolithic应用程序（6.0.1），其中包含用于开发和生产中的SQL Server的基于磁盘的h2。我将DatabaseConfigration更改为此：
@Configuration
@EnableJpaRepositories(".....repository")
@EnableJpaAuditing(auditorAwareRef = "springSecurityAuditorAware")
@EnableTransactionManagement
public class DatabaseConfiguration {
private final Logger log = LoggerFactory.getLogger(DatabaseConfiguration.class);
private final Environment env;
public DatabaseConfiguration(Environment env) {
this.env = env;
}
/**
* Open the TCP port for the H2 database, so it is available remotely.
*
* @return the H2 database TCP server.
* @throws SQLException if the server failed to start.
*/
@Bean(initMethod = "start", destroyMethod = "stop")
@Profile(JHipsterConstants.SPRING_PROFILE_DEVELOPMENT)
public Object h2TCPServer() throws SQLException {
String port = getValidPortForH2();
log.debug("H2 database is available on port {}", port);
return H2ConfigurationHelper.createServer(port);
}
private String getValidPortForH2() {
int port = Integer.parseInt(env.getProperty("server.port"));
if (port < 10000) {
port = 10000 + port;
} else {
if (port < 63536) {
port = port + 2000;
} else {
port = port - 2000;
}
}
return String.valueOf(port);
}
@Bean
@Primary
@ConfigurationProperties("spring.datasource")
public DataSourceProperties defaultDataSourceProperties() {
return new DataSourceProperties();
}
@Bean
@Primary
@ConfigurationProperties("spring.datasource.hikari")
public DataSource defaultDataSource() {
return defaultDataSourceProperties().initializeDataSourceBuilder()
//.type(HikariDataSource.class)
.build();
}
@Bean(name = "entityManagerFactory")
@Primary
public LocalContainerEntityManagerFactoryBean customerEntityManagerFactory(
EntityManagerFactoryBuilder builder) {
return builder
.dataSource(defaultDataSource())
.packages(MyMainApplicationClassApp.class)
.persistenceUnit("default")
.build();
}
@Bean(name = "transactionManager")
@Primary
public JpaTransactionManager db2TransactionManager(@Qualifier("entityManagerFactory") final EntityManagerFactory emf) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(emf);
return transactionManager;
}
}
然后我创建了一个名为AdditionalDatabaseConfiguration的新配置类，首先我只想添加一个附加数据库：
@Configuration
@EnableTransactionManagement
public class AdditionalDatabaseConfiguration {
@Bean
@ConfigurationProperties("sync.datasource")
public DataSourceProperties SyncDataSourceProperties() {
return new DataSourceProperties();
}
@Bean
@ConfigurationProperties("sync.datasource.hikari")
public HikariDataSource SyncDataSource() {
var properties = SyncDataSourceProperties();
return properties.initializeDataSourceBuilder()
.type(HikariDataSource.class)
.build();
}
}
我还没有更改默认的spring.datasource配置，但是我确实为新的ds添加了配置：
sync:
datasource:
type: com.zaxxer.hikari.HikariDataSource
url: jdbc:sqlserver://***:1433;database=***
username: ****
password: ***
testOnBorrow: true
validationQuery: SELECT 1
hikari:
poolName: HikariSync
auto-commit: false
connection-test-query: SELECT 1
maximum-pool-size: 2
idle-timeout: 10000
data-source-properties:
cachePrepStmts: true
prepStmtCacheSize: 250
prepStmtCacheSqlLimit: 2048
useServerPrepStmts: true
应用程序编译并启动，没有错误或警告，并且应用程序的主页也加载。但是，如果尝试登录，则会出现异常：
https://pastebin.com/raw/HWSEQGyq
org.springframework.dao.InvalidDataAccessResourceUsageException: could not prepare statement; SQL [call next value for sequenceGenerator]; nested exception is org.hibernate.exception.SQLGrammarException: could not prepare statement
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:279)
at org.sprin.....
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
... 130 common frames omitted
Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Sequence "SEQUENCEGENERATOR" not found; SQL statement:
call next value for sequenceGenerator [90036-199]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:573)
at org.h2.message.DbException.getJdbcSQLException(DbException.java:427)
at org.h2.message.DbException.get(DbException.java:205)
at org.h2.message.DbException.get(DbException.java:181)
at org.h2.command.Parser.readSequence(Parser.java:7196)
at org.h2.command.Parser.readTermWithIdentifier(Parser.java:4192)
at org.h2.command.Parser.readTerm(Parser.java:3972)
at org.h2.command.Parser.readFactor(Parser.java:3090)
at org.h2.command.Parser.readSum(Parser.java:3077)
at org.h2.command.Parser.readConcat(Parser.java:3047)
at org.h2.command.Parser.readCondition(Parser.java:2900)
at org.h2.command.Parser.readAnd(Parser.java:2872)
at org.h2.command.Parser.readExpression(Parser.java:2864)
at org.h2.command.Parser.parseCall(Parser.java:6043)
at org.h2.command.Parser.parsePrepared(Parser.java:848)
at org.h2.command.Parser.parse(Parser.java:788)
at org.h2.command.Parser.parse(Parser.java:760)
at org.h2.command.Parser.prepareCommand(Parser.java:683)
at org.h2.engine.Session.prepareLocal(Session.java:627)
at org.h2.engine.Session.prepareCommand(Session.java:565)
at org.h2.jdbc.JdbcConnection.prepareCommand(JdbcConnection.java:1292)
at org.h2.jdbc.JdbcPreparedStatement.<init>(JdbcPreparedStatement.java:77)
at org.h2.jdbc.JdbcConnection.prepareStatement(JdbcConnection.java:349)
at com.zaxxer.hikari.pool.ProxyConnection.prepareStatement(ProxyConnection.java:311)
at com.zaxxer.hikari.pool.HikariProxyConnection.prepareStatement(HikariProxyConnection.java)
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$1.doPrepare(StatementPreparerImpl.java:87)
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172)
... 165 common frames omitted
我的@Primary数据源配置/代码可能不正确。谁能告诉我要添加什么？
编辑。：如果删除数据源配置，则可以登录，这是导致错误的原因。
编辑。：主要问题是Caused by: org.h2.jdbc.JdbcSQLSyntaxErrorException: Sequence "SEQUENCEGENERATOR" not found; SQL statement:
call next value for sequenceGenerator [90036-199]
Edit2 ：：为默认数据源设置方言并不能解决问题（使用yml）：
jpa:
database-platform: io.github.jhipster.domain.util.FixedH2Dialect <-- maybe this is the issue?
database: H2
show-sql: true
properties:
hibernate.id.new_generator_mappings: true
hibernate.connection.provider_disables_autocommit: true
hibernate.cache.use_second_level_cache: true
hibernate.cache.use_query_cache: false
hibernate.generate_statistics: false
hibernate.dialect: org.hibernate.dialect.H2Dialect <-- this
Edit3：我在开发人员配置文件（直接在SQL Server）上未使用H2的情况下生成了一个新项目，添加了相同的多数据源配置，问题仍然存在。我刚收到一个com.microsoft.sqlserver.jdbc.SQLServerException: Invalid object name 'sequenceGenerator'.异常。
Edit4 .：我的MSSQL问题可以通过将sequence_generator和domain.User文件中的生成器名称更改为domain.PersistentAuditEvent来解决。 H2的具体问题？
tasukete kudasai
答案 0 :(得分：0)
在我的情况下，jhipster为序列生成了不同的名称（我选择了oracle db进行生产） 000000000000000_initial_schema.xml中的“ hibernate_sequence”
域实体中的
和“ sequenceGenerator”
@Id @GeneratedValue（策略= GenerationType.SEQUENCE，生成器=“ sequenceGenerator”） @SequenceGenerator（name =“ sequenceGenerator”） 私人Long ID；
通过在两个地方设置相同的名称已解决了问题。