英文:
Unable to Connect Microsoft SQL Server to Spring Boot Application
问题
我面临着这个问题：
我正在使用 SpringBoot 应用程序，有两个数据源，一个是 MySQL，另一个是 Microsoft SQL Server，都是使用 JPA 进行操作。这些数据库位于某个远程服务器/机器上。
以下是异常信息部分：
org.springframework.beans.factory.BeanCreationException: 在类路径资源 [org/my/in/config/SecondDBConfig.class] 中定义的名为 'secondEntityManagerFactory' 的 Bean 创建失败: 调用初始化方法失败; 嵌套异常是 javax.persistence.PersistenceException: [PersistenceUnit: default] 无法构建 Hibernate SessionFactory; 嵌套异常是 java.lang.ClassCastException: 无法将 java.lang.Integer 强制转换为 java.lang.Long
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1794) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
...
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] 无法构建 Hibernate SessionFactory; 嵌套异常是 java.lang.ClassCastException: 无法将 java.lang.Integer 强制转换为 java.lang.Long
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:403) ~[spring-orm-5.2.8.RELEASE.jar:5.2.8.RELEASE]
...
Caused by: java.lang.ClassCastException: 无法将 java.lang.Integer 强制转换为 java.lang.Long
at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getLong(SQLServerResultSet.java:2151) ~[mssql-jdbc-6.4.0.jre8.jar:na]
...
英文:
I am facing this issue:
I am Using SpringBoot Application and have 2 Data Sources one is MySQl and second Microsoft SQL Server
Using JPA
This Database is present in some Remote Server/Machine.
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'secondEntityManagerFactory' defined in class path resource [org/my/in/config/SecondDBConfig.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1794) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1109) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.my.in.MyApplication.main(MyApplication.java:10) [classes/:na]
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory; nested exception is java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:403) ~[spring-orm-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:378) ~[spring-orm-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.afterPropertiesSet(LocalContainerEntityManagerFactoryBean.java:341) ~[spring-orm-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1853) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1790) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
... 17 common frames omitted
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long
at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getLong(SQLServerResultSet.java:2151) ~[mssql-jdbc-6.4.0.jre8.jar:na]
at com.zaxxer.hikari.pool.HikariProxyResultSet.getLong(HikariProxyResultSet.java) ~[HikariCP-3.4.5.jar:na]
at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.resultSetStartValueSize(SequenceInformationExtractorLegacyImpl.java:129) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorLegacyImpl.extractMetadata(SequenceInformationExtractorLegacyImpl.java:59) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.tool.schema.extract.internal.DatabaseInformationImpl.initializeSequences(DatabaseInformationImpl.java:65) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.tool.schema.extract.internal.DatabaseInformationImpl.<init>(DatabaseInformationImpl.java:59) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.tool.schema.internal.Helper.buildDatabaseInformation(Helper.java:155) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.tool.schema.internal.AbstractSchemaMigrator.doMigration(AbstractSchemaMigrator.java:96) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:184) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:73) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:316) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:469) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:1259) ~[hibernate-core-5.4.20.Final.jar:5.4.20.Final]
at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:58) ~[spring-orm-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:365) ~[spring-orm-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.buildNativeEntityManagerFactory(AbstractEntityManagerFactoryBean.java:391) ~[spring-orm-5.2.8.RELEASE.jar:5.2.8.RELEASE]
... 21 common frames omitted
答案1
得分: 1
以下是翻译好的内容：
这是一个关于 Hibernate 中的已知问题（hubernate）。
他们找到的解决方法是创建一个自定义的方言（非常奇怪...）
package ....;
import org.hibernate.dialect.SQLServer2012Dialect;
import org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorNoOpImpl;
import org.hibernate.tool.schema.extract.spi.SequenceInformationExtractor;
/**
* 用于处理 SEQUENCE 模式查询结果处理问题的自定义 SQLServer 方言
*/
public class SQLServerCustomDialect extends SQLServer2012Dialect {
@Override
public SequenceInformationExtractor getSequenceInformationExtractor() {
if (getQuerySequencesString() == null) {
return SequenceInformationExtractorNoOpImpl.INSTANCE;
} else {
return SequenceInformationExtractorImpl.INSTANCE;
}
}
}
还需要一个稍微尴尬的适配器类来在 int 和 long 之间正确转换值。
/*
* Hibernate，用于习惯性 Java 的关系持久性
*
* 许可证：GNU Lesser General Public License (LGPL)，版本 2.1 或更高版本。
* 请参阅根目录中的 lgpl.txt 文件或 <http://www.gnu.org/licenses/lgpl-2.1.html>。
*
* 改编自 Hibernate 发行版中同名的类。
*/
package ...;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.boot.model.relational.QualifiedSequenceName;
import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
import org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorNoOpImpl;
import org.hibernate.tool.schema.extract.internal.SequenceInformationImpl;
import org.hibernate.tool.schema.extract.spi.ExtractionContext;
import org.hibernate.tool.schema.extract.spi.SequenceInformation;
import org.hibernate.tool.schema.extract.spi.SequenceInformationExtractor;
/**
* 作者：Steve Ebersole
*/
public class SequenceInformationExtractorImpl implements SequenceInformationExtractor {
/**
* 单例访问
*/
public static final SequenceInformationExtractorImpl INSTANCE = new SequenceInformationExtractorImpl();
@Override
public Iterable<SequenceInformation> extractMetadata(final ExtractionContext extractionContext) throws SQLException {
final String lookupSql = extractionContext.getJdbcEnvironment().getDialect().getQuerySequencesString();
// *应该*永远不会发生，但为了安全起见，考虑到性能...
if (lookupSql == null) {
return SequenceInformationExtractorNoOpImpl.INSTANCE.extractMetadata(extractionContext);
}
final IdentifierHelper identifierHelper = extractionContext.getJdbcEnvironment().getIdentifierHelper();
final Statement statement = extractionContext.getJdbcConnection().createStatement();
try {
final ResultSet resultSet = statement.executeQuery(lookupSql);
try {
final List<SequenceInformation> sequenceInformationList = new ArrayList<>();
while (resultSet.next()) {
sequenceInformationList.add(
new SequenceInformationImpl(
new QualifiedSequenceName(
identifierHelper.toIdentifier(
resultSetCatalogName(resultSet)
),
identifierHelper.toIdentifier(
resultSetSchemaName(resultSet)
),
identifierHelper.toIdentifier(
resultSetSequenceName(resultSet)
)
),
resultSetStartValueSize(resultSet),
resultSetMinValue(resultSet),
resultSetMaxValue(resultSet),
resultSetIncrementValue(resultSet)
)
);
}
return sequenceInformationList;
} finally {
try {
resultSet.close();
} catch (final SQLException ignore) {
}
}
} finally {
try {
statement.close();
} catch (final SQLException ignore) {
}
}
}
// ...
}
英文:
This is a known bug in hubernate
The solution they found was to create a custom dialect (oddly enough...)
package ....;
import org.hibernate.dialect.SQLServer2012Dialect;
import org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorNoOpImpl;
import org.hibernate.tool.schema.extract.spi.SequenceInformationExtractor;
/**
* Custom SQLServer dialect to deal with SEQUENCE schema query result processing issue
*/
public class SQLServerCustomDialect extends SQLServer2012Dialect {
@Override
public SequenceInformationExtractor getSequenceInformationExtractor() {
if ( getQuerySequencesString() == null ) {
return SequenceInformationExtractorNoOpImpl.INSTANCE;
}
else {
return SequenceInformationExtractorImpl.INSTANCE;
}
}
}
With a slightly awkward adapter class to properly convert the value between int and long
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*
* Adapted from the class with the same name in the Hibernate distribution.
*/
package ...;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.boot.model.relational.QualifiedSequenceName;
import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
import org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorNoOpImpl;
import org.hibernate.tool.schema.extract.internal.SequenceInformationImpl;
import org.hibernate.tool.schema.extract.spi.ExtractionContext;
import org.hibernate.tool.schema.extract.spi.SequenceInformation;
import org.hibernate.tool.schema.extract.spi.SequenceInformationExtractor;
/**
* @author Steve Ebersole
*/
public class SequenceInformationExtractorImpl implements SequenceInformationExtractor {
/**
* Singleton access
*/
public static final SequenceInformationExtractorImpl INSTANCE = new SequenceInformationExtractorImpl();
@Override
public Iterable<SequenceInformation> extractMetadata(final ExtractionContext extractionContext) throws SQLException {
final String lookupSql = extractionContext.getJdbcEnvironment().getDialect().getQuerySequencesString();
// *should* never happen, but to be safe in the interest of performance...
if ( lookupSql == null ) {
return SequenceInformationExtractorNoOpImpl.INSTANCE.extractMetadata( extractionContext );
}
final IdentifierHelper identifierHelper = extractionContext.getJdbcEnvironment().getIdentifierHelper();
final Statement statement = extractionContext.getJdbcConnection().createStatement();
try {
final ResultSet resultSet = statement.executeQuery( lookupSql );
try {
final List<SequenceInformation> sequenceInformationList = new ArrayList<>();
while ( resultSet.next() ) {
sequenceInformationList.add(
new SequenceInformationImpl(
new QualifiedSequenceName(
identifierHelper.toIdentifier(
resultSetCatalogName( resultSet )
),
identifierHelper.toIdentifier(
resultSetSchemaName( resultSet )
),
identifierHelper.toIdentifier(
resultSetSequenceName( resultSet )
)
),
resultSetStartValueSize( resultSet ),
resultSetMinValue( resultSet ),
resultSetMaxValue( resultSet ),
resultSetIncrementValue( resultSet )
)
);
}
return sequenceInformationList;
}
finally {
try {
resultSet.close();
}
catch (final SQLException ignore) {
}
}
}
finally {
try {
statement.close();
}
catch (final SQLException ignore) {
}
}
}
protected String sequenceNameColumn() {
return "sequence_name";
}
protected String sequenceCatalogColumn() {
return "sequence_catalog";
}
protected String sequenceSchemaColumn() {
return "sequence_schema";
}
protected String sequenceStartValueColumn() {
return "start_value";
}
protected String sequenceMinValueColumn() {
return "minimum_value";
}
protected String sequenceMaxValueColumn() {
return "maximum_value";
}
protected String sequenceIncrementColumn() {
return "increment";
}
protected String resultSetSequenceName(final ResultSet resultSet) throws SQLException {
return resultSet.getString( sequenceNameColumn() );
}
protected String resultSetCatalogName(final ResultSet resultSet) throws SQLException {
final String column = sequenceCatalogColumn();
return column != null ? resultSet.getString( column ) : null;
}
protected String resultSetSchemaName(final ResultSet resultSet) throws SQLException {
final String column = sequenceSchemaColumn();
return column != null ? resultSet.getString( column ) : null;
}
protected Long resultSetStartValueSize(final ResultSet resultSet) throws SQLException {
final String column = sequenceStartValueColumn();
return column != null ? resultSetGetAsLong( resultSet, column ) : null;
}
protected Long resultSetMinValue(final ResultSet resultSet) throws SQLException {
final String column = sequenceMinValueColumn();
return column != null ? resultSetGetAsLong( resultSet, column ) : null;
}
protected Long resultSetMaxValue(final ResultSet resultSet) throws SQLException {
final String column = sequenceMaxValueColumn();
return column != null ? resultSetGetAsLong( resultSet, column ) : null;
}
protected Long resultSetIncrementValue(final ResultSet resultSet) throws SQLException {
final String column = sequenceIncrementColumn();
return column != null ? resultSetGetAsLong( resultSet, column ) : null;
}
private Long resultSetGetAsLong(final ResultSet resultSet, final String column) throws SQLException {
final Object value = resultSet.getObject(column);
if (value == null || !(value instanceof Number)) {
return null;
}
return ((Number)value).longValue();
}
}
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