我正在尝试在WIldFly 8.2中提供restfull服务。我想使用hibernate来使用db。
1）我在wildfly的配置文件中创建了数据源。
2）我检查了管理控制台中的连接。它有效。
3）persistence.xml：
<?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="HSDB" transaction-type="JTA">
<jta-data-source>java:jboss/datasources/PostgreDataSource</jta-data-source>
<properties>
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.show_sql" value="true" />
<property name="format_sql" value="true" />
</properties>
</persistence-unit>
</persistence>
User.java
@Entity
@Table(name = "User", schema="public" )
public class User {
private int mId;
private String mText;
/**
* @return the pid
*/
@Id
@GeneratedValue
@Column(name = "id")
public int getId() {
return mId;
}
/**
* @param pid
* the pid to set
*/
public void setText(String text) {
this.mText = text;
}
/**
* @return the pid
*/
@Column(name = "text")
public String getText() {
return mText;
}
/**
* @param pid
* the pid to set
*/
public void setId(int pid) {
this.mId = pid;
}
@Override
public String toString() {
return String.format(
"id=%d\nid =%s",
this.mId);
}
}
rs file：
@Path("/")
public class HelloWorld {
@PersistenceUnit(unitName = "HSDB")
private EntityManagerFactory mEntityManagerFactory;
...
@GET
@Path("/")
@Produces(MediaType.APPLICATION_XML)
@Consumes(MediaType.APPLICATION_XML)
public String getHelloWorldXML() {
// EntityManagerFactory emf = Persistence.createEntityManagerFactory("HSDB"); //returns null
// EntityManager em = emf.createEntityManager(); //null pointer exception on this line. emf is null
EntityManager em = mEntityManagerFactory.createEntityManager();
String id = "_def_";
Session session = (Session) em.getDelegate();
Transaction tx = null;
User person = null;
try {
tx = session.beginTransaction(); //<-- problem is here
person = (User) session.get(User.class, 7);
id = String.valueOf(person.getId());
} catch (HibernateException e) {
if (tx != null)
tx.rollback();
e.printStackTrace();
} finally {
tx.commit();
session.close();
}
return "<xml><result>" + helloService.createHelloMessage("World") + id + "</result></xml>";
}
}
当我将项目部署到wildfly时，我在控制台hibernate日志中看到了：
19:39:57,618 INFO [org.hibernate.jpa.internal.util.LogHelper] (ServerService Thread Pool -- 147) HHH000204: Processing PersistenceUnitInfo [
name: HSDB
...]
19:39:57,623 INFO [org.jboss.weld.deployer] (MSC service thread 1-1) JBAS016002: Processing weld deployment heartstone-server.war
19:39:57,640 INFO [org.jboss.weld.deployer] (MSC service thread 1-13) JBAS016005: Starting Services for CDI deployment: heartstone-server.war
19:39:57,642 INFO [org.jboss.weld.deployer] (MSC service thread 1-3) JBAS016008: Starting weld service for deployment heartstone-server.war
19:39:57,645 INFO [org.jboss.as.jpa] (ServerService Thread Pool -- 147) JBAS011409: Starting Persistence Unit (phase 2 of 2) Service 'heartstone-server.war#HSDB'
19:39:57,649 INFO [org.hibernate.dialect.Dialect] (ServerService Thread Pool -- 147) HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL9Dialect
19:39:57,650 INFO [org.hibernate.engine.jdbc.internal.LobCreatorBuilder] (ServerService Thread Pool -- 147) HHH000423: Disabling contextual LOB creation as JDBC driver reported JDBC version [3] less than 4
19:39:57,651 INFO [org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory] (ServerService Thread Pool -- 147) HHH000397: Using ASTQueryTranslatorFactory
19:39:57,657 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (ServerService Thread Pool -- 147) HHH000228: Running hbm2ddl schema update
19:39:57,658 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (ServerService Thread Pool -- 147) HHH000102: Fetching database metadata
19:39:57,659 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (ServerService Thread Pool -- 147) HHH000396: Updating schema
19:39:57,673 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 147) HHH000261: Table found: public.user
19:39:57,673 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 147) HHH000037: Columns: [id, text]
19:39:57,673 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 147) HHH000108: Foreign keys: []
19:39:57,673 INFO [org.hibernate.tool.hbm2ddl.TableMetadata] (ServerService Thread Pool -- 147) HHH000126: Indexes: [user_pkey]
19:39:57,674 INFO [org.hibernate.tool.hbm2ddl.SchemaUpdate] (ServerService Thread Pool -- 147) HHH000232: Schema update complete
所以与数据库的连接很好。但是，当我尝试在代码中使用它时，我得到了这个错误：
19:43:38,472 ERROR [stderr] (default task-35) org.hibernate.TransactionException: Could not register synchronization for container transaction
19:43:38,472 ERROR [stderr] (default task-35) at org.hibernate.engine.transaction.internal.jta.CMTTransaction.afterTransactionBegin(CMTTransaction.java:72)
19:43:38,472 ERROR [stderr] (default task-35) at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:166)
19:43:38,473 ERROR [stderr] (default task-35) at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1435)
19:43:38,473 ERROR [stderr] (default task-35) at ru.suvitruf.hs.server.HelloWorld.getHelloWorldXML(HelloWorld.java:86)
19:43:38,473 ERROR [stderr] (default task-35) at ru.suvitruf.hs.server.HelloWorld$Proxy$_$$_WeldClientProxy.getHelloWorldXML(Unknown Source)
19:43:38,473 ERROR [stderr] (default task-35) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
19:43:38,473 ERROR [stderr] (default task-35) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
19:43:38,473 ERROR [stderr] (default task-35) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
19:43:38,473 ERROR [stderr] (default task-35) at java.lang.reflect.Method.invoke(Unknown Source)
19:43:38,473 ERROR [stderr] (default task-35) at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:137)
19:43:38,473 ERROR [stderr] (default task-35) at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:296)
19:43:38,474 ERROR [stderr] (default task-35) at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:250)
19:43:38,474 ERROR [stderr] (default task-35) at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:237)
19:43:38,474 ERROR [stderr] (default task-35) at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)
19:43:38,474 ERROR [stderr] (default task-35) at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179)
19:43:38,474 ERROR [stderr] (default task-35) at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220)
19:43:38,474 ERROR [stderr] (default task-35) at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
19:43:38,474 ERROR [stderr] (default task-35) at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
19:43:38,474 ERROR [stderr] (default task-35) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
19:43:38,474 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
19:43:38,474 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:61)
19:43:38,475 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
19:43:38,475 ERROR [stderr] (default task-35) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
19:43:38,475 ERROR [stderr] (default task-35) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
19:43:38,475 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
19:43:38,475 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:56)
19:43:38,475 ERROR [stderr] (default task-35) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
19:43:38,475 ERROR [stderr] (default task-35) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:45)
19:43:38,475 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:63)
19:43:38,475 ERROR [stderr] (default task-35) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:58)
19:43:38,476 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:70)
19:43:38,476 ERROR [stderr] (default task-35) at io.undertow.security.handlers.SecurityInitialHandler.handleRequest(SecurityInitialHandler.java:76)
19:43:38,476 ERROR [stderr] (default task-35) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
19:43:38,476 ERROR [stderr] (default task-35) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
19:43:38,476 ERROR [stderr] (default task-35) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
19:43:38,476 ERROR [stderr] (default task-35) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
19:43:38,476 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:261)
19:43:38,476 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:247)
19:43:38,476 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:76)
19:43:38,476 ERROR [stderr] (default task-35) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:166)
19:43:38,477 ERROR [stderr] (default task-35) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:197)
19:43:38,477 ERROR [stderr] (default task-35) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:759)
19:43:38,477 ERROR [stderr] (default task-35) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
19:43:38,477 ERROR [stderr] (default task-35) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
19:43:38,477 ERROR [stderr] (default task-35) at java.lang.Thread.run(Unknown Source)
答案 0 :(得分：0)
将此属性添加到persistence.xml之后，它运行良好：
<property name="hibernate.transaction.factory_class"
value="org.hibernate.transaction.JDBCTransactionFactory" />