2
因爲我是使用Java EE 7的新手，所以我創建了一個專門用於學習目的的項目。 我創建了一個CDI豆與請求範圍如下（它只是實現Serializable接口，因爲我一直在使用它試圖與@ javax.faces.view.ViewScoped）@PostConstruct第一次執行失敗
import com.issuerepository.domain.Issue;
import com.issuerepository.domain.IssueType;
import com.issuerepository.facade.api.IssueRepositoryFacade;
import javax.annotation.PostConstruct;
import javax.enterprise.context.RequestScoped;
import javax.inject.Inject;
import javax.inject.Named;
import java.io.Serializable;
import java.util.List;
@Named
@RequestScoped
public class CreateIssueBean implements Serializable {
@Inject
private IssueRepositoryFacade issueRepository;
private Issue issue;
private List<IssueType> allIssueType;
@PostConstruct
private void init() {
issue = new Issue();
allIssueType = issueRepository.findAllIssueType();
}
public String saveIssue() {
issueRepository.saveOrUpdateIssue(issue);
return "searchIssue.xhtml?faces-redirect=true";
}
public Issue getIssue() {
return issue;
}
public void setIssue(Issue issue) {
this.issue = issue;
}
public List<IssueType> getAllIssueType() {
return allIssueType;
}
public void setAllIssueType(List<IssueType> allIssueType) {
this.allIssueType = allIssueType;
}
}
的事情是：我開始WildFly（又名JBoss AS 8），我的應用程序正常啓動。然後我打開瀏覽器並嘗試訪問應用程序的URL。在第一次訪問，我得到這個異常：
Stack Trace
javax.servlet.ServletException: WELD-000049: Unable to invoke private void com.issuemanager.web.bean.CreateIssueBean.init() on [email protected]
以上是顯示在瀏覽器，下面是顯示上的server.log：
Caused by: org.hibernate.exception.GenericJDBCException: Could not open connection
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:235) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:171) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:63) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:162) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:160) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1884) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1861) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1838) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.Loader.doQuery(Loader.java:909) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.Loader.doList(Loader.java:2553) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.Loader.doList(Loader.java:2539) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2369) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.Loader.list(Loader.java:2364) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:496) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:387) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:231) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1264) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
... 177 more
Caused by: java.sql.SQLException: javax.resource.ResourceException: IJ000460: Error checking for a transaction
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:154)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:380) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:228) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
... 198 more
Caused by: javax.resource.ResourceException: IJ000460: Error checking for a transaction
at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:416)
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:513)
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:146)
... 201 more
Caused by: javax.resource.ResourceException: IJ000459: Transaction is not active: tx=TransactionImple < ac, BasicAction: 0:ffffc0a81906:-758bf077:5376ec7d:9 status: ActionStatus.ABORT_ONLY >
at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:400)
... 203 more
因此，大家可以看到它有調用問題@PostConstruct方法。只是讓你知道
IssueRepositoryFacade
是一個EJB。但是，當我刷新相同的URL時，它的工作正常。我不知道發生了什麼。這個EJB註解爲
@TransactionAttribute(TransactionAttributeType.REQUIRED)
所以我使用容器管理的事務。我使用MySql數據庫的JPA 2.1。 有人，如果不給我一個解決方案，至少可以解釋爲什麼會發生這種情況？
謝謝。
爲什麼你認爲PostConstruct存在問題？我看到一個事務錯誤，可能是一些持久性配置問題。 – skegg99
這應該對你有幫助：http://thejavablog.wordpress.com/2010/04/05/transaction-is-not-active-txtransactionimple-ac-basicaction/ – pL4Gu33