带有eclipse链接的多租户

Question

我正在尝试使用eclipselink实现多租户架构。我有一张表Entidade，Entidade的名字将是租户。我有一个Usuario表，其中每个usuario连接到Entidade。 Usuario和Entidade表有一个租户默认值，因为当用Usuario登录时，我无法知道Usuario属于哪个Entidade。通过在数据库中插入实体，不会给出任何问题。问题是查询用户类，特别是当搜索子类，Entidade时，抛出以下异常：

[EL Warning]: metadata: 2013-09-18 11:39:50.976--ServerSession(20689274)--The tenant discriminator context property for the tenant discriminator column [USUARIO.id_tenant] on the element [class teste.Usuario] is being defaulted to: eclipselink.tenant-id.
[EL Warning]: metadata: 2013-09-18 11:39:50.993--ServerSession(20689274)--The tenant discriminator context property for the tenant discriminator column [ENTIDADE.id_tenant] on the element [class teste.Entidade] is being defaulted to: eclipselink.tenant-id.
[EL Info]: 2013-09-18 11:39:51.604--ServerSession(20689274)--EclipseLink, version: Eclipse Persistence Services - 2.5.0.v20130507-3faac2b
[EL Warning]: metadata: 2013-09-18 11:39:51.823--ServerSession(20689274)--Reverting the lazy setting on the OneToOne or ManyToOne attribute [entidade] for the entity class [class teste.Usuario] since weaving was not enabled or did not occur.
[EL Info]: connection: 2013-09-18 11:39:51.894--ServerSession(20689274)--file:/D:/java/workspaceweb/TesteTenant/bin/_teste login successful
[EL Fine]: sql: 2013-09-18 11:39:51.93--ServerSession(20689274)--Connection(29390792)--SELECT id_usuario, id_tenant, nome, id_entidade FROM USUARIO WHERE (id_tenant = ?)
    bind => [usuario]
[EL Warning]: 2013-09-18 11:39:51.957--ServerSession(20689274)--Exception [EclipseLink-6174] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.QueryException
Exception Description: No value was provided for the session property [eclipselink.tenant-id]. This exception is possible when using additional criteria or tenant discriminator columns without specifying the associated contextual property. These properties must be set through Entity Manager, Entity Manager Factory or persistence unit properties. If using native EclipseLink, these properties should be set directly on the session.
Query: ReadObjectQuery(name="readEntidade" referenceClass=Entidade sql="SELECT id_entidade, id_tenant, nome FROM ENTIDADE WHERE ((id_entidade = ?) AND (id_tenant = ?))")
Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-6174] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.QueryException
Exception Description: No value was provided for the session property [eclipselink.tenant-id]. This exception is possible when using additional criteria or tenant discriminator columns without specifying the associated contextual property. These properties must be set through Entity Manager, Entity Manager Factory or persistence unit properties. If using native EclipseLink, these properties should be set directly on the session.
Query: ReadObjectQuery(name="readEntidade" referenceClass=Entidade sql="SELECT id_entidade, id_tenant, nome FROM ENTIDADE WHERE ((id_entidade = ?) AND (id_tenant = ?))")
    at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:479)
    at teste.TesteBuscaMain.main(TesteBuscaMain.java:29)
Caused by: Exception [EclipseLink-6174] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.QueryException
Exception Description: No value was provided for the session property [eclipselink.tenant-id]. This exception is possible when using additional criteria or tenant discriminator columns without specifying the associated contextual property. These properties must be set through Entity Manager, Entity Manager Factory or persistence unit properties. If using native EclipseLink, these properties should be set directly on the session.
Query: ReadObjectQuery(name="readEntidade" referenceClass=Entidade sql="SELECT id_entidade, id_tenant, nome FROM ENTIDADE WHERE ((id_entidade = ?) AND (id_tenant = ?))")
    at org.eclipse.persistence.exceptions.QueryException.missingContextPropertyForPropertyParameterExpression(QueryException.java:260)
    at org.eclipse.persistence.internal.expressions.ParameterExpression.getValue(ParameterExpression.java:269)
    at org.eclipse.persistence.internal.databaseaccess.DatabaseCall.translate(DatabaseCall.java:1102)
    at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:241)
    at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:228)
    at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.selectOneRow(DatasourceCallQueryMechanism.java:714)
    at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectOneRowFromTable(ExpressionQueryMechanism.java:2777)
    at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectOneRow(ExpressionQueryMechanism.java:2730)
    at org.eclipse.persistence.queries.ReadObjectQuery.executeObjectLevelReadQuery(ReadObjectQuery.java:526)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1155)
    at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:899)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1114)
    at org.eclipse.persistence.queries.ReadObjectQuery.execute(ReadObjectQuery.java:429)
    at org.eclipse.persistence.internal.sessions.AbstractSession.internalExecuteQuery(AbstractSession.java:3207)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1797)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1779)
    at org.eclipse.persistence.internal.indirection.NoIndirectionPolicy.valueFromQuery(NoIndirectionPolicy.java:326)
    at org.eclipse.persistence.mappings.ForeignReferenceMapping.valueFromRowInternal(ForeignReferenceMapping.java:2234)
    at org.eclipse.persistence.mappings.OneToOneMapping.valueFromRowInternal(OneToOneMapping.java:1790)
    at org.eclipse.persistence.mappings.ForeignReferenceMapping.valueFromRow(ForeignReferenceMapping.java:2120)
    at org.eclipse.persistence.mappings.ForeignReferenceMapping.readFromRowIntoObject(ForeignReferenceMapping.java:1455)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildAttributesIntoObject(ObjectBuilder.java:455)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:862)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneFromRow(ObjectBuilder.java:1948)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:726)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:629)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:587)
    at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:571)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:782)
    at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:848)
    at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:490)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1155)
    at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:899)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1114)
    at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:402)
    at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1202)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2894)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1797)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1779)
    at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1744)
    at org.eclipse.persistence.internal.jpa.QueryImpl.executeReadQuery(QueryImpl.java:258)
    at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:468)
    ... 1 more

[EL Warning]: metadata: 2013-09-18 11:39:50.976--ServerSession(20689274)--The tenant discriminator context property for the tenant discriminator column [USUARIO.id_tenant] on the element [class teste.Usuario] is being defaulted to: eclipselink.tenant-id. [EL Warning]: metadata: 2013-09-18 11:39:50.993--ServerSession(20689274)--The tenant discriminator context property for the tenant discriminator column [ENTIDADE.id_tenant] on the element [class teste.Entidade] is being defaulted to: eclipselink.tenant-id. [EL Info]: 2013-09-18 11:39:51.604--ServerSession(20689274)--EclipseLink, version: Eclipse Persistence Services - 2.5.0.v20130507-3faac2b [EL Warning]: metadata: 2013-09-18 11:39:51.823--ServerSession(20689274)--Reverting the lazy setting on the OneToOne or ManyToOne attribute [entidade] for the entity class [class teste.Usuario] since weaving was not enabled or did not occur. [EL Info]: connection: 2013-09-18 11:39:51.894--ServerSession(20689274)--file:/D:/java/workspaceweb/TesteTenant/bin/_teste login successful [EL Fine]: sql: 2013-09-18 11:39:51.93--ServerSession(20689274)--Connection(29390792)--SELECT id_usuario, id_tenant, nome, id_entidade FROM USUARIO WHERE (id_tenant = ?) bind => [usuario] [EL Warning]: 2013-09-18 11:39:51.957--ServerSession(20689274)--Exception [EclipseLink-6174] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.QueryException Exception Description: No value was provided for the session property [eclipselink.tenant-id]. This exception is possible when using additional criteria or tenant discriminator columns without specifying the associated contextual property. These properties must be set through Entity Manager, Entity Manager Factory or persistence unit properties. If using native EclipseLink, these properties should be set directly on the session. Query: ReadObjectQuery(name="readEntidade" referenceClass=Entidade sql="SELECT id_entidade, id_tenant, nome FROM ENTIDADE WHERE ((id_entidade = ?) AND (id_tenant = ?))") Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-6174] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.QueryException Exception Description: No value was provided for the session property [eclipselink.tenant-id]. This exception is possible when using additional criteria or tenant discriminator columns without specifying the associated contextual property. These properties must be set through Entity Manager, Entity Manager Factory or persistence unit properties. If using native EclipseLink, these properties should be set directly on the session. Query: ReadObjectQuery(name="readEntidade" referenceClass=Entidade sql="SELECT id_entidade, id_tenant, nome FROM ENTIDADE WHERE ((id_entidade = ?) AND (id_tenant = ?))") at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:479) at teste.TesteBuscaMain.main(TesteBuscaMain.java:29) Caused by: Exception [EclipseLink-6174] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.QueryException Exception Description: No value was provided for the session property [eclipselink.tenant-id]. This exception is possible when using additional criteria or tenant discriminator columns without specifying the associated contextual property. These properties must be set through Entity Manager, Entity Manager Factory or persistence unit properties. If using native EclipseLink, these properties should be set directly on the session. Query: ReadObjectQuery(name="readEntidade" referenceClass=Entidade sql="SELECT id_entidade, id_tenant, nome FROM ENTIDADE WHERE ((id_entidade = ?) AND (id_tenant = ?))") at org.eclipse.persistence.exceptions.QueryException.missingContextPropertyForPropertyParameterExpression(QueryException.java:260) at org.eclipse.persistence.internal.expressions.ParameterExpression.getValue(ParameterExpression.java:269) at org.eclipse.persistence.internal.databaseaccess.DatabaseCall.translate(DatabaseCall.java:1102) at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:241) at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.executeCall(DatasourceCallQueryMechanism.java:228) at org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism.selectOneRow(DatasourceCallQueryMechanism.java:714) at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectOneRowFromTable(ExpressionQueryMechanism.java:2777) at org.eclipse.persistence.internal.queries.ExpressionQueryMechanism.selectOneRow(ExpressionQueryMechanism.java:2730) at org.eclipse.persistence.queries.ReadObjectQuery.executeObjectLevelReadQuery(ReadObjectQuery.java:526) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1155) at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:899) at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1114) at org.eclipse.persistence.queries.ReadObjectQuery.execute(ReadObjectQuery.java:429) at org.eclipse.persistence.internal.sessions.AbstractSession.internalExecuteQuery(AbstractSession.java:3207) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1797) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1779) at org.eclipse.persistence.internal.indirection.NoIndirectionPolicy.valueFromQuery(NoIndirectionPolicy.java:326) at org.eclipse.persistence.mappings.ForeignReferenceMapping.valueFromRowInternal(ForeignReferenceMapping.java:2234) at org.eclipse.persistence.mappings.OneToOneMapping.valueFromRowInternal(OneToOneMapping.java:1790) at org.eclipse.persistence.mappings.ForeignReferenceMapping.valueFromRow(ForeignReferenceMapping.java:2120) at org.eclipse.persistence.mappings.ForeignReferenceMapping.readFromRowIntoObject(ForeignReferenceMapping.java:1455) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildAttributesIntoObject(ObjectBuilder.java:455) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:862) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneFromRow(ObjectBuilder.java:1948) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:726) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:629) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:587) at org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:571) at org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:782) at org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:848) at org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:490) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1155) at org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:899) at org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1114) at org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:402) at org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1202) at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2894) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1797) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1779) at org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1744) at org.eclipse.persistence.internal.jpa.QueryImpl.executeReadQuery(QueryImpl.java:258) at org.eclipse.persistence.internal.jpa.QueryImpl.getResultList(QueryImpl.java:468) ... 1 more

创建EntityManagerFactory和EntityManager的类：

persistence.xml：

public class JPAUtil { private static JPAUtil instance = null; private static EntityManagerFactory emf; private static EntityTransaction transaction; private static ThreadLocal entityManagers = new ThreadLocal(); static { instance = new JPAUtil(); } private JPAUtil() { emf = Persistence.createEntityManagerFactory("PUAequalis"); } public static JPAUtil getInstance() { if (instance == null) { instance = new JPAUtil(); } return instance; } public static void openEntityManager(String tenant) { if (entityManagers == null || entityManagers.get() == null || !entityManagers.get().isOpen()) { HashMap properties = new HashMap(); EntityManager em = emf.createEntityManager(); em.setProperty("eclipselink.tenant-id", tenant); em.setProperty(PersistenceUnitProperties.MULTITENANT_PROPERTY_DEFAULT, tenant); entityManagers.set(em); } else { closeOpenEntityManager(tenant); } } public EntityManager getEntityManager() { return entityManagers.get(); } public static void closeEntityManager() { if (entityManagers != null && entityManagers.get().isOpen()) { entityManagers.get().close(); } } public static void closeOpenEntityManager(String tenant) { if (entityManagers != null && entityManagers.get().isOpen()) { entityManagers.get().close(); entityManagers.remove(); HashMap properties = new HashMap(); properties.put("eclipselink.tenant-id", tenant); entityManagers.set(emf.createEntityManager(properties)); } } public static void closeEntityManagerFactory() { if (emf != null && emf.isOpen()) { emf.close(); } } public EntityTransaction getTransaction() { if (transaction == null || !transaction.isActive()) { transaction = entityManagers.get().getTransaction(); } return transaction; } }

    <?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
    xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

    <persistence-unit name="teste" transaction-type="RESOURCE_LOCAL">
        <provider> org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <exclude-unlisted-classes>false</exclude-unlisted-classes>
        <properties>
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/teste" />
            <property name="javax.persistence.jdbc.user" value="root" />
            <property name="javax.persistence.jdbc.password" value="root" />
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            <property name="eclipselink.multitenant.tenants-share-cache"
                value="true" />
            <!-- <property name="eclipselink.ddl-generation" value="create-tables" /> -->
            <property name="eclipselink.logging.level.sql" value="ALL" />
            <property name="eclipselink.logging.parameters" value="true" />
            <property name="eclipselink.logging.session" value="true"/>

        </properties>
    </persistence-unit>

</persistence>

和de Entities：

    <?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
    xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">

    <persistence-unit name="teste" transaction-type="RESOURCE_LOCAL">
        <provider> org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <exclude-unlisted-classes>false</exclude-unlisted-classes>
        <properties>
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/teste" />
            <property name="javax.persistence.jdbc.user" value="root" />
            <property name="javax.persistence.jdbc.password" value="root" />
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            <property name="eclipselink.multitenant.tenants-share-cache"
                value="true" />
            <!-- <property name="eclipselink.ddl-generation" value="create-tables" /> -->
            <property name="eclipselink.logging.level.sql" value="ALL" />
            <property name="eclipselink.logging.parameters" value="true" />
            <property name="eclipselink.logging.session" value="true"/>

        </properties>
    </persistence-unit>

</persistence>

有人有这个问题吗？

Answer 1

这可能是因为您需要在事务开始之后使用租户值设置context-property。

http://codecrafters.blogspot.it/2013/03/multi-tenant-cloud-applications-with.html

让我知道......