Oracle 11g AQ : problem enqueue user-defined type with varchar2 attribute

Question

Hello.
I have a problem enqueuing a user-defined type to the queue on Oracle 10g.
I'm using jdbc driver (ojdbc5.jar, version 11.1.0.6.0) as they provide oracle.jdbc.aq package.
The type is following:
CREATE OR REPLACE TYPE FIXED_T5 AS OBJECT
(id integer,
label varchar2(100),
code integer,
today date
)I have created a java class for this type with jpub utility supplied with oracle 11g client package:
jpub -user=scott/tger -url=jdbc:oracle:thin:@host:sid-sql=FIXED_T5:ru.invito.FixedType -compile=falseIt generated FixedType.java and FixedTypeRef.java files. Don't understand why i need the latter (FixedTypeRef).
Then in test app:
package ru.invito;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.Date;
import java.util.Properties;
import java.util.UUID;
import junit.framework.TestCase;
import oracle.jdbc.aq.AQAgent;
import oracle.jdbc.aq.AQEnqueueOptions;
import oracle.jdbc.aq.AQFactory;
import oracle.jdbc.aq.AQMessage;
import oracle.jdbc.aq.AQMessageProperties;
import oracle.jdbc.aq.AQEnqueueOptions.DeliveryMode;
import oracle.jdbc.aq.AQEnqueueOptions.VisibilityOption;
import oracle.jdbc.driver.OracleConnection;
import oracle.jdbc.driver.OracleDriver;
import oracle.sql.Datum;
import oracle.sql.STRUCT;
import oracle.sql.StructDescriptor;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class AqTest extends TestCase {
     protected Log logger = LogFactory.getLog(getClass());
     public void testEnqueue() throws Exception {
          OracleDriver dr = new OracleDriver();
          Properties prop = new Properties();
          prop.setProperty("user", Config.USERNAME);
          prop.setProperty("password", Config.PASSWORD);
          OracleConnection connection = (OracleConnection) dr.connect(Config.JDBC_URL, prop);
          assertNotNull(connection);
          connection.setAutoCommit(false);
          enqueueMessage(connection, "INVITO.FIXED_T5Q", null);
          connection.commit();
     private void enqueueMessage(OracleConnection conn, String queueName, AQAgent[] recipients) throws SQLException,
               IOException {
          logger.debug("----------- Enqueue start ------------");
          AQMessageProperties props = makeProps(queueName);
          AQMessage mesg = AQFactory.createAQMessage(props);
          String msqText = String.format("Hello, %s!", queueName);
          FixedType data = createData(36, msqText);
          Datum d = data.toDatum(conn);
          STRUCT s = (STRUCT) d;
          debugStruct("s", s);
          String toIdStr = byteBufferToHexString(s.getDescriptor().getOracleTypeADT().getTOID(), 20);
          logger.debug("s.toIdStr: " + toIdStr);
          StructDescriptor sd = StructDescriptor.createDescriptor("INVITO.FIXED_T5", conn);
          logger.debug("sd.toXMLString(): " + sd.toXMLString());
          mesg.setPayload(s);
          AQEnqueueOptions opt = makeEnqueueOptions();
          logger.debug("sending............");
          // execute the actual enqueue operation:
          conn.enqueue(queueName, opt, mesg);
          debugMessageId(mesg);
          logger.debug("----------- Enqueue done ------------");
     private void debugMessageId(AQMessage mesg) throws SQLException {
          byte[] mesgId = mesg.getMessageId();
          if (mesgId == null) {
               throw new IllegalStateException("message id is NULL");
          String mesgIdStr = byteBufferToHexString(mesgId, 20);
          logger.debug("Message ID from enqueue call: " + mesgIdStr);
      * @return
      * @throws SQLException
     private FixedType createData(int ID, String label) throws SQLException {
          FixedType data = new FixedType();
          data._struct.setNChar(1);// initializes the flag for 'label' field
          data.setId(ID);
          data.setLabel(label);
          data.setCode(1);
          Date today = new Date();
          data.setToday(new Timestamp(today.getTime()));
          return data;
      * @param string
      * @param s
      * @throws SQLException
     private void debugStruct(String string, STRUCT s) throws SQLException {
          logger.debug(s + ".debugString(): " + s.debugString());
          logger.debug(s + "s.dump(): " + s.dump());
      * @return
      * @throws SQLException
     private AQAgent makeAgent() throws SQLException {
          AQAgent ag = AQFactory.createAQAgent();
          ag.setName("AQ_TEST");
          String agentAddress = null;
          try {
               agentAddress = InetAddress.getLocalHost().getHostAddress();
          catch (UnknownHostException e) {
               logger.error("cannot resolve localhost ip address. will not set it as AQ Agent address");
               agentAddress = "NA";
          ag.setAddress(agentAddress);
          return ag;
     private AQMessageProperties makeProps(String queueName) throws SQLException {
          final String EXCEPTION_Q_TEMPLATE = "AQ$_%sT_E";
          final int DEFAULT_DELAY = 0;
          final int DEFAULT_EXPIRATION = -1;
          final int DEFAULT_PRIORITY = 0;
          AQMessageProperties propeties = AQFactory.createAQMessageProperties();
          propeties.setCorrelation(UUID.randomUUID().toString());
          propeties.setDelay(DEFAULT_DELAY);
          propeties.setExceptionQueue(String.format(EXCEPTION_Q_TEMPLATE, queueName));
          propeties.setExpiration(DEFAULT_EXPIRATION);
          propeties.setPriority(DEFAULT_PRIORITY);
          // propeties.setRecipientList(null);//should not set
          propeties.setSender(makeAgent());
          return propeties;
      * @return
      * @throws SQLException
     private AQEnqueueOptions makeEnqueueOptions() throws SQLException {
          AQEnqueueOptions opt = new AQEnqueueOptions();
          opt.setRetrieveMessageId(true);
          // these are the default settings (if none specified)
          opt.setDeliveryMode(DeliveryMode.PERSISTENT);
          opt.setTransformation(null);
          opt.setVisibility(VisibilityOption.ON_COMMIT);
          return opt;
      * Form the AQ reference
      * @param buffer
      * @param maxNbOfBytes
      * @return
     private static final String byteBufferToHexString(byte[] buffer, int maxNbOfBytes) {
          if (buffer == null)
               return null;
          int offset = 0;
          StringBuffer sb = new StringBuffer();
          while (offset < buffer.length && offset < maxNbOfBytes) {
               String hexrep = Integer.toHexString((int) buffer[offset] & 0xFF);
               if (hexrep.length() == 1)
                    hexrep = "0" + hexrep;
               sb.append(hexrep);
               offset++;
          String ret = sb.toString();
          return ret;
}The output is following:
[main] 2008-07-03 19:09:49,863 DEBUG [ru.invito.AqTest] - ----------- Enqueue start ------------
[main] 2008-07-03 19:09:50,348 DEBUG [ru.invito.AqTest] - [email protected](): name = INVITO.FIXED_T5 length = 4 attribute[0] = 36 attribute[1] = Hell
o, INVITO.FIXED_T5Q! attribute[2] = 1 attribute[3] = 2008-07-03 19:09:49.0
[main] 2008-07-03 19:09:50,363 DEBUG [ru.invito.AqTest] - [email protected](): name = INVITO.FIXED_T5
length = 4
ID = 36
LABEL = Hello, INVITO.FIXED_T5Q!
CODE = 1
TODAY = 2008-07-03 19:09:49.0
[main] 2008-07-03 19:09:50,363 DEBUG [ru.invito.AqTest] - s.toIdStr: 507ccce5b6e9f572e040007f01007203
[main] 2008-07-03 19:09:50,363 DEBUG [ru.invito.AqTest] - sd.toXMLString(): <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<StructDescriptor sqlName="INVITO.FIXED_T5" >
  <OracleTypeADT sqlName="INVITO.FIXED_T5"  typecode="0" tds_version="1"
           is_embedded="false" is_top_level="true" is_upt="false" finalType="true" subtype="false">
    <attributes>
      <attribute name="ID"  type="INTEGER" >
        <OracleType typecode="2" />
      </attribute>
      <attribute name="LABEL"  type="VARCHAR2" >
        <OracleType typecode="12" />
      </attribute>
      <attribute name="CODE"  type="INTEGER" >
        <OracleType typecode="2" />
      </attribute>
      <attribute name="TODAY"  type="DATE" >
        <OracleType typecode="0" />
      </attribute>
    </attributes>
  </OracleTypeADT>
</StructDescriptor>
[main] 2008-07-03 19:09:50,379 DEBUG [ru.invito.AqTest] - sending............
[main] 2008-07-03 19:09:50,395 DEBUG [ru.invito.AqTest] - Message ID from enqueue call: 511ff143bd4fa536e040007f01003192
[main] 2008-07-03 19:09:50,395 DEBUG [ru.invito.AqTest] - ----------- Enqueue done ------------But when dequeueing the 'label' attribute is lost:
DECLARE
dequeue_options     DBMS_AQ.dequeue_options_t;
message_properties  DBMS_AQ.message_properties_t;
message_handle      RAW(16);
message             fixed_t5;
BEGIN
  dequeue_options.navigation := DBMS_AQ.FIRST_MESSAGE;
  DBMS_AQ.DEQUEUE(
     queue_name          =>     'fixed_t5q',
     dequeue_options     =>     dequeue_options,
     message_properties  =>     message_properties,
     payload             =>     message,
     msgid               =>     message_handle);
  DBMS_OUTPUT.PUT_LINE('ID   : '||message.id);
  DBMS_OUTPUT.PUT_LINE('Label: '||message.label);
  DBMS_OUTPUT.PUT_LINE('Code : '||message.code);
  DBMS_OUTPUT.PUT_LINE('Today: '||message.today);
  COMMIT;
END;
ID   : 36
Label:
Code : 1
Today: 03.07.08
Could anyone tell me what is wrong with the setup/code?
Why 'label' not saved in queue, though i saw it is not empty in STRUCT?

Answer 1

Thank you for the reply!
I have enqueued:
[main] 2008-07-04 15:30:30,639 DEBUG [ru.invito.UserDefinedTypeAqTest$1] - [email protected](): name = INVITO.FIXED_T5
length = 4
ID = 41
LABEL = Hello, INVITO.FIXED_T5Q!
CODE = 1
TODAY = 2008-07-04 15:30:30.0and in table (select * from FIXED_T5QT) the 'label' is blank:
Q_NAME     FIXED_T5Q
MSGID     51310809B5EA3728E040007F01000C79
CORRID     b8f38fd3-4fa6-4e0f-85d1-2440d02d655e
PRIORITY     0
STATE     0
DELAY     
EXPIRATION     
TIME_MANAGER_INFO     
LOCAL_ORDER_NO     0
CHAIN_NO     0
CSCN     0
DSCN     0
ENQ_TIME     04.07.2008 15:28:44
ENQ_UID     INVITO
ENQ_TID                       4012
DEQ_TIME     
DEQ_UID     
DEQ_TID     
RETRY_COUNT     0
EXCEPTION_QSCHEMA     AQ$_INVITO
EXCEPTION_QUEUE     FIXED_T5QT_E
STEP_NO     0
RECIPIENT_KEY     0
DEQUEUE_MSGID     
SENDER_NAME     AQ_TEST
SENDER_ADDRESS     10.1.1.137
SENDER_PROTOCOL     
USER_DATA.ID     41
USER_DATA.LABEL     
USER_DATA.CODE     1
USER_DATA.TODAY     04.07.2008 15:30:30I must point to a strange thing: when the FixedType instance is created (via new operator) and then the setLabel("....") called as:
FixedType data = new FixedType();
// hack: proper initialization for 'label' field
data._struct.setNChar(1);
data.setId(ID);
data.setLabel(label);
data.setCode(1);
Date today = new Date();
data.setToday(new Timestamp(today.getTime()));
Datum d = data.toDatum(connection);
STRUCT s = (STRUCT) d;
logger.debug(s + ".debugString(): " + s.debugString());
logger.debug(s + ".dump(): " + s.dump());and if i comment line (data._struct.setNChar(1);) the debug messages for created STRUCT also shows empty value for label.
But if i explicitly call data._struct.setNChar(1) then debug contains the label i defined in call to the setLabel method.