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发布于 2024-08-14 01:38:45 字数 4077 浏览 9 评论 0原文

我正在尝试向 Oracle clob 字段写入超过 4000 个字符的值。这似乎是一个常见问题,但似乎没有一个解决方案有效。所以我从这里祈求帮助。

肮脏的信息:
使用 Oracle 9.2.0.8.0
Hibernate3 使用注释实现 pojo
汤姆猫6.0.16
Oracle 10.2.x 驱动程序
C3P0 连接池提供程序

在我的 persistence.xml 中,我有:

<persistence-unit name="DWEB" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
        <property name="hibernate.archive.autodetection" value="class"/> 
        <property name="hibernate.connection.password" value="###" />
        <property name="hibernate.connection.username" value="###" />
        <property name="hibernate.default_schema" value="schema" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
        <property name="hibernate.c3p0.min_size" value="5" />
        <property name="hibernate.c3p0.max_size" value="20" />
        <property name="hibernate.c3p0.timeout" value="300" />
        <property name="hibernate.c3p0.max_statements" value="50" />
        <property name="hibernate.c3p0.idle_test_period" value="3000" />
        <property name="show_sql" value="true" />
        <property name="format_sql" value="true" />
        <property name="use_sql_comments" value="true" />
        <property name="SetBigStringTryClob" value="true"/>
        <property name="hibernate.jdbc.batch_size" value="0"/>
        <property name="hibernate.connection.url" value="jdbc:oracle:thin:@server.ss.com:1521:DDD"/>
        <property name="hibernate.connection.driver_class" value="oracle.jdbc.driver.OracleDriver"/>
    </properties>
</persistence-unit>

getter 和 setter 如下所示:

@Lob 
@Column(name="COMMENT_DOC")
public String getDocument(){
    return get("Document");
}
public void setDocument(String s){
    put("Document",s);
}

我得到的例外是:

SEVERE: Servlet.service() for servlet SW threw exception
java.sql.SQLException: Io exception: Software caused connection abort: socket write error
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334)
    at oracle.jdbc.ttc7.TTC7Protocol.handleIOException(TTC7Protocol.java:3678)
    at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1999)
    at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java:1144)
    at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:2152)
    at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:2035)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2876)
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:609)
    at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:46)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2275)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2688)
    at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:79)
    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027)
    at org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:304)
    at org.sw.website.actions.content.AddComment.performAction(AddComment.java:60)
...

如果我需要提供更多信息,请询问。一切正常,直到超过可怕的限制。

I am trying to write to an Oracle clob field a value over 4000 characters. This seams to be a common issue but non of the solutions seem to work. So I pray for help from here.

Down and dirty info:
Using Oracle 9.2.0.8.0
Hibernate3 implementing pojo's with annotations
Tomcat 6.0.16
Oracle 10.2.x drivers
C3P0 connction pool provider

In my persistence.xml I have:

<persistence-unit name="DWEB" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
        <property name="hibernate.archive.autodetection" value="class"/> 
        <property name="hibernate.connection.password" value="###" />
        <property name="hibernate.connection.username" value="###" />
        <property name="hibernate.default_schema" value="schema" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle10gDialect" />
        <property name="hibernate.c3p0.min_size" value="5" />
        <property name="hibernate.c3p0.max_size" value="20" />
        <property name="hibernate.c3p0.timeout" value="300" />
        <property name="hibernate.c3p0.max_statements" value="50" />
        <property name="hibernate.c3p0.idle_test_period" value="3000" />
        <property name="show_sql" value="true" />
        <property name="format_sql" value="true" />
        <property name="use_sql_comments" value="true" />
        <property name="SetBigStringTryClob" value="true"/>
        <property name="hibernate.jdbc.batch_size" value="0"/>
        <property name="hibernate.connection.url" value="jdbc:oracle:thin:@server.ss.com:1521:DDD"/>
        <property name="hibernate.connection.driver_class" value="oracle.jdbc.driver.OracleDriver"/>
    </properties>
</persistence-unit>

The getter and setter looks like:

@Lob 
@Column(name="COMMENT_DOC")
public String getDocument(){
    return get("Document");
}
public void setDocument(String s){
    put("Document",s);
}

The exception I am getting is:

SEVERE: Servlet.service() for servlet SW threw exception
java.sql.SQLException: Io exception: Software caused connection abort: socket write error
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
    at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334)
    at oracle.jdbc.ttc7.TTC7Protocol.handleIOException(TTC7Protocol.java:3678)
    at oracle.jdbc.ttc7.TTC7Protocol.doOall7(TTC7Protocol.java:1999)
    at oracle.jdbc.ttc7.TTC7Protocol.parseExecuteFetch(TTC7Protocol.java:1144)
    at oracle.jdbc.driver.OracleStatement.executeNonQuery(OracleStatement.java:2152)
    at oracle.jdbc.driver.OracleStatement.doExecuteOther(OracleStatement.java:2035)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:2876)
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:609)
    at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:46)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2275)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2688)
    at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:79)
    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027)
    at org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:304)
    at org.sw.website.actions.content.AddComment.performAction(AddComment.java:60)
...

If I need to give more info pleas ask. Everything works until the dreaded limit is exceeded.

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评论(4

筱武穆 2024-08-21 01:38:45

感谢非推理者的所有帮助。我已经完成了这个工作,并且想将所有部分放在这里以供将来参考。不管所有关于升级驱动程序并且一切都会起作用的说法,这些对我来说都不起作用。最后,我必须实现一个“org.hibernate.usertype.UserType”,我将其命名为与网络上所有示例相同的 StringClobType。除了一些导入之外,我使用了 在 Oracle 和 Hibernate 中使用 Clob/Blob 中的示例。就我而言,忽略“当心”的说法。

为了让合并工作正常进行,我必须做出一项改变。某些方法未在提供的代码示例中实现。 Eclipse 通过将它们删除来为我解决了这个问题。很酷,但是需要实际实现替换方法,否则所有合并都会用 null 覆盖数据。这是我的实现:

public Object replace(Object newValue, Object existingValue, Object arg2)throws HibernateException {
    return newValue;
}

我不会在这里重复类实现,请转到上面的链接查看它。我使用了第三个灰色框中的代码。然后在 pojo 类的顶部,我想在导入后使用它,然后添加以下内容

...  
import org.hibernate.annotations.Type;  
import org.hibernate.annotations.TypeDefs;  
import org.hibernate.annotations.TypeDef;  

@TypeDefs({  
    @TypeDef(  
        name="clob",  
        typeClass = foo.StringClobType.class  
    )  
})  
@Entity  
@Table(name="EA_COMMENTS")  
public class Comment extends SWDataObject implements JSONString, Serializable {  
...  
}   

然后为了使用新的 UserType,我将注释添加到我的 getter 中:

@Type(type="clob")
@Column(name="COMMENT_DOC")
public String getDocument(){
    return get("Document");
}

我不需要 @Lob 注释。
在我的 persistence.xml 中,持久性单元声明看起来像这样:

<persistence-unit name="###" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
        <property name="hibernate.archive.autodetection" value="class"/> 
        <property name="hibernate.connection.password" value="###" />
        <property name="hibernate.connection.username" value="###" />
        <property name="hibernate.connection.url" value="jdbc:oracle:thin:@server.something.com:1521:###"/>
        <property name="hibernate.connection.driver_class" value="oracle.jdbc.OracleDriver"/>
        <property name="hibernate.default_schema" value="###" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle9iDialect" />
        <property name="hibernate.c3p0.min_size" value="5" />
        <property name="hibernate.c3p0.max_size" value="100" />
        <property name="hibernate.c3p0.timeout" value="300" />
        <property name="hibernate.c3p0.max_statements" value="50" />
        <property name="hibernate.c3p0.idle_test period" value="3000" />
        <property name="hibernate.c3p0.idle_connection_test_period" value="300" />
        <property name="show_sql" value="false" />
        <property name="format_sql" value="false" />
        <property name="use_sql_comments" value="false" />
        <property name="hibernate.jdbc.batch_size" value="0"/>
    </properties>
</persistence-unit>

SetBigStringTryClob 从来没有为我工作过,并且对于这个最终实现来说不需要。

我得到的教训是,最终加入可能比战斗更好。这可以节省我三天的时间。

Thanks to non sequitor for all the help. I have this working and figure I will put all the pieces here for future reference. Regardless of all the claims about upgrading the drivers and everything would work, non of that worked for me. In the end I had to implement a 'org.hibernate.usertype.UserType' I named it the same as all the examples on the web StringClobType. Save for some imports I used the example from Using Clobs/Blobs with Oracle and Hibernate. As far as I am concerned ignore the "beware" claim.

There was one change I had to make to get merges to work. Some of the methods were not implemented in the provided code sample. Eclipse fixed it for me by stubbing them out. Cool, but the replace method needs to be actually implemented or all merges will overwrite the data with a null. Here is my implementation:

public Object replace(Object newValue, Object existingValue, Object arg2)throws HibernateException {
    return newValue;
}

I will not duplicate the class implementation here go to the above link to see it. I used the code in the third gray box. Then at the top of the pojo class I wanted to use it in I added the following after the imports

...  
import org.hibernate.annotations.Type;  
import org.hibernate.annotations.TypeDefs;  
import org.hibernate.annotations.TypeDef;  

@TypeDefs({  
    @TypeDef(  
        name="clob",  
        typeClass = foo.StringClobType.class  
    )  
})  
@Entity  
@Table(name="EA_COMMENTS")  
public class Comment extends SWDataObject implements JSONString, Serializable {  
...  
}   

Then to use the new UserType I added the annotation to my getter:

@Type(type="clob")
@Column(name="COMMENT_DOC")
public String getDocument(){
    return get("Document");
}

I did not need the @Lob annotation.
In my persistence.xml the persistence-unit declaration ended looking like:

<persistence-unit name="###" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
        <property name="hibernate.archive.autodetection" value="class"/> 
        <property name="hibernate.connection.password" value="###" />
        <property name="hibernate.connection.username" value="###" />
        <property name="hibernate.connection.url" value="jdbc:oracle:thin:@server.something.com:1521:###"/>
        <property name="hibernate.connection.driver_class" value="oracle.jdbc.OracleDriver"/>
        <property name="hibernate.default_schema" value="###" />
        <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle9iDialect" />
        <property name="hibernate.c3p0.min_size" value="5" />
        <property name="hibernate.c3p0.max_size" value="100" />
        <property name="hibernate.c3p0.timeout" value="300" />
        <property name="hibernate.c3p0.max_statements" value="50" />
        <property name="hibernate.c3p0.idle_test period" value="3000" />
        <property name="hibernate.c3p0.idle_connection_test_period" value="300" />
        <property name="show_sql" value="false" />
        <property name="format_sql" value="false" />
        <property name="use_sql_comments" value="false" />
        <property name="hibernate.jdbc.batch_size" value="0"/>
    </properties>
</persistence-unit>

The SetBigStringTryClob never worked for me and was not needed for this final implementation.

My lesson learned is in the end it is probably better to join then to fight. It would of saved me three days.

忘羡 2024-08-21 01:38:45

我认为您的问题可能是您使用的是Oracle 9i,但Hibernate方言是10g。确保您的驱动程序、数据库版本和方言全部同​​步,因为还有 9i 方言org.hibernate.dialect.Oracle9iDialect

I think your problem might be that you are using Oracle 9i but Hibernate dialect is 10g. Make sure your driver,db version and dialect are all in sync because there is a 9i dialect as well org.hibernate.dialect.Oracle9iDialect

枯叶蝶 2024-08-21 01:38:45

它应该是:

<property name="hibernate.connection.SetBigStringTryClob">true</property>
<property name="hibernate.jdbc.batch_size">0</property>

而不是:

<property name="SetBigStringTryClob">true</property>

并为您的数据库使用正确的方言 (org.hibernate.dialect.Oracle9iDialect)。

另请确保您使用的是最新的 Oracle 10g 第 2 版瘦驱动程序 (10.2.0.4) 或更高版本。

It should be:

<property name="hibernate.connection.SetBigStringTryClob">true</property>
<property name="hibernate.jdbc.batch_size">0</property>

And not:

<property name="SetBigStringTryClob">true</property>

And use the right dialect for your database (org.hibernate.dialect.Oracle9iDialect).

Also make sure that you are using the latest Oracle 10g Release 2 thin driver (10.2.0.4) or later.

他夏了夏天 2024-08-21 01:38:45

我们过去也遇到过类似的问题,使用 LONG 列而不是 CLOB。问题在于 JDBC 驱动程序,我们现在使用且工作正常的驱动程序是 替代文字

We had a similar problem in the past, with LONG columns instead of CLOBs. The problem was the JDBC driver, the one we use now and works fine is alt text

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