This is how I define them in my files:
@weblogic.transaction-isolation TRANSACTION_READ_COMMITTED_FOR_UPDATE @weblogic.dbms-column-type OracleClob
Hope this helps.
-- mike
On Jul 21, 2004, at 9:31 AM, [EMAIL PROTECTED] wrote:
OK, I am trying this, but neither the @weblogic.dbms-column-type or the @weblogic.transaction-isolation have a parameter identified. What am I suppose to use as ???="TRANSACTION_READ_COMMITTED_FOR_UPDATE"?
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Mike Moulton Sent: Tuesday, July 20, 2004 5:26 PM To: [EMAIL PROTECTED] Subject: Re: [Xdoclet-user] FW: http://e-docs.bea.com/wls/docs61/ejb/cmp.html#1061636
Look at the @weblogic.dbms-column-type tag in the docs. Note to get blob/clobs to work properly I had to set the transaction isolation to TRANSACTION_READ_COMMITTED_FOR_UPDATE for the specific bean. Look at the docs surround the @weblogic.transaction-isolation tag.
-- Mike
On Jul 20, 2004, at 5:00 PM, [EMAIL PROTECTED] wrote:
Does anyone know how I am going to set this up in XDoclet?
-----Original Message----- From: Horvath, Tibor Sent: Tuesday, July 20, 2004 4:45 PM To: Horvath, Tibor; Knutson, Mick Subject: RE: http://e-docs.bea.com/wls/docs61/ejb/cmp.html#1061636
-----Original Message----- From: Horvath, Tibor Sent: Tuesday, July 20, 2004 3:02 PM To: Knutson, Mick Subject: http://e-docs.bea.com/wls/docs61/ejb/cmp.html#1061636
BLOB and CLOB DBMS Column Support for the Oracle DBMS
WebLogic Server supports Oracle Binary Large Object (BLOB) and Character Large Object (CLOB) DBMS columns with EJB CMP. BLOBs and CLOBs are data types used for efficient storage and retrieval of large objects. CLOBs are string or char objects; BLOBs are binary or serializable objects such as pictures that translate into large byte arrays.
BLOBs and CLOBs map a string variable, a value of OracleBlob or OracleClob, to a BLOB or CLOB column. WebLogic Server maps CLOBs only to the data type java.lang.string. At this time, no support is available for mapping char arrays to a CLOB column.
To enable BLOB/CLOB support:
In the bean class, declare the variable. Edit the XML by declaring the dbms-column-type deployment descriptor in the weblogic-cmp-rdbms jar.xml file. Create the BLOB or CLOB in the Oracle database.
Using BLOB or CLOB may slow performance because of the size of the BLOB or CLOB object.
Specifying a BLOB Using the Deployment Descriptor
The following XML code shows how to specify a BLOB object using the dbms-column element in weblogic-cmp-rdbms-jar-xml file.
Figure 5-2 Specifying a BLOB object
<field-map> <cmp-field>photo</cmp-field> <dbms-column>PICTURE</dbms-column> <dbms_column-type>OracleBlob</dbms-column-type> </field-map>
Controlling Serialization of cmp-fields Mapped to OracleBlobs
By default, when WebLogic Server writes and reads a cmp-field of type byte[] that is mapped to an OracleBlob, it serializes and deserializes the field, respectively. Mick, This and the previous message came from searching the BEA web site. Do you have this covered? The clob(4000) seems to be a red herring. All clobs show up as 4000 on Oracle DESCRIBE command. Tibor
If WebLogic Server reads a BLOB that was written directly to the database by another program, errors can result, because the container assumes that the data is serialized.
To specify that the data is not serialized, compile the EJB with this flag:
java -Dweblogic.byteArrayIsSerializedToOracleBlob=false weblogic.ejbc std_ejb.jar ejb.jar
Specifying a CLOB Using the Deployment Descriptors
The following XML code shows how to specify a CLOB object using the dbms-column element in the weblogic-cmp-rdbms-jar-xml file.
Figure 5-3 Specifying a CLOB object
<field-map> <cmp-field>description</cmp-field> <dbms-column>product_description</dbms-column> <dbms_column-type>OracleClob</dbms-column-type> </field-map>
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