16 Oracle JMS Types Examples

Example 16-2 Populating and Enqueuing a BytesMessage

connect jmsuser/jmsuser 

SET ECHO ON
set serveroutput on

DECLARE

    id                 pls_integer;
    agent              sys.aq$_agent := sys.aq$_agent(' ', null, 0);
    message            sys.aq$_jms_bytes_message;
    enqueue_options    dbms_aq.enqueue_options_t;
    message_properties dbms_aq.message_properties_t;
    msgid raw(16);

    java_exp           exception;
    pragma EXCEPTION_INIT(java_exp, -24197);
BEGIN

    -- Consturct a empty BytesMessage object
    message := sys.aq$_jms_bytes_message.construct;

    -- Shows how to set the JMS header 
    message.set_replyto(agent);
    message.set_type('tkaqpet1');
    message.set_userid('jmsuser');
    message.set_appid('plsql_enq');
    message.set_groupid('st');
    message.set_groupseq(1);

    -- Shows how to set JMS user properties
    message.set_string_property('color', 'RED');
    message.set_int_property('year', 1999);
    message.set_float_property('price', 16999.99);
    message.set_long_property('mileage', 300000);
    message.set_boolean_property('import', True);
    message.set_byte_property('password', -127);

    -- Shows how to populate the message payload of aq$_jms_bytes_message 

    -- Passing -1 reserve a new slot within the message store of sys.aq$_jms_bytes_message.
    -- The maximum number of sys.aq$_jms_bytes_message type of messges to be operated at
    -- the same time within a session is 20. Calling clean_body function with parameter -1 
    -- might result a ORA-24199 error if the messages currently operated is already 20. 
    -- The user is responsible to call clean or clean_all function to clean up message store.
    id := message.clear_body(-1);

    -- Write data into the BytesMessage paylaod. These functions are analogy of JMS JAVA api's.
    -- See the document for detail.

    -- Write a byte to the BytesMessage payload
    message.write_byte(id, 10);

    -- Write a RAW data as byte array to the BytesMessage payload
    message.write_bytes(id, UTL_RAW.XRANGE(HEXTORAW('00'), HEXTORAW('FF')));

    -- Write a portion of the RAW data as byte array to BytesMessage payload
    -- Note the offset follows JAVA convention, starting from 0
    message.write_bytes(id, UTL_RAW.XRANGE(HEXTORAW('00'), HEXTORAW('FF')), 0, 16);

    -- Write a char to the BytesMessage payload
    message.write_char(id, 'A');

    -- Write a double to the BytesMessage payload
    message.write_double(id, 9999.99);

    -- Write a float to the BytesMessage payload
    message.write_float(id, 99.99);

    -- Write a int to the BytesMessage payload
    message.write_int(id, 12345);

    -- Write a long to the BytesMessage payload
    message.write_long(id, 1234567);

    -- Write a short to the BytesMessage payload
    message.write_short(id, 123);

    -- Write a String to the BytesMessage payload, 
    -- the String is encoded in UTF8 in the message payload
    message.write_utf(id, 'Hello World!');

    -- Flush the data from JAVA stored procedure (JServ) to PL/SQL side 
    -- Without doing this, the PL/SQL message is still empty. 
    message.flush(id);

    -- Use either clean_all or clean to clean up the message store when the user 
    -- do not plan to do paylaod population on this message anymore
    sys.aq$_jms_bytes_message.clean_all();
    --message.clean(id);

    -- Enqueue this message into AQ queue using DBMS_AQ package
    dbms_aq.enqueue(queue_name => 'jmsuser.jms_bytes_que',
                    enqueue_options => enqueue_options,
                    message_properties => message_properties,
                    payload => message,
                    msgid => msgid);


    EXCEPTION 
    WHEN java_exp THEN
      dbms_output.put_line('exception information:');
      display_exp(sys.aq$_jms_stream_message.get_exception());

END;
/

commit;

Example 16-3 Dequeuing and Retrieving JMS BytesMessage Data

connect jmsuser/jmsuser 

set echo on
set serveroutput on size 20000

DECLARE

    id                 pls_integer;
    blob_data          blob;
    clob_data          clob;
    blob_len           pls_integer;
    message            sys.aq$_jms_bytes_message;
    agent              sys.aq$_agent;
    dequeue_options    dbms_aq.dequeue_options_t;
    message_properties dbms_aq.message_properties_t;
    msgid raw(16);
    gdata              sys.aq$_jms_value;

    java_exp           exception;
    pragma EXCEPTION_INIT(java_exp, -24197);
BEGIN
    DBMS_OUTPUT.ENABLE (20000);

    -- Dequeue this message from AQ queue using DBMS_AQ package
    dbms_aq.dequeue(queue_name => 'jmsuser.jms_bytes_que',
                    dequeue_options => dequeue_options,
                    message_properties => message_properties,
                    payload => message,
                    msgid => msgid);

    -- Retrieve the header 
    agent := message.get_replyto;

    dbms_output.put_line('Type: ' || message.get_type || 
                         ' UserId: ' || message.get_userid || 
                         ' AppId: ' || message.get_appid || 
                         ' GroupId: ' || message.get_groupid || 
                         ' GroupSeq: ' || message.get_groupseq);

    -- Retrieve the user properties
    dbms_output.put_line('price: ' || message.get_float_property('price'));
    dbms_output.put_line('color: ' || message.get_string_property('color'));
    IF message.get_boolean_property('import') = TRUE THEN
       dbms_output.put_line('import: Yes' );
    ELSIF message.get_boolean_property('import') = FALSE THEN
       dbms_output.put_line('import: No' );
    END IF;
    dbms_output.put_line('year: ' || message.get_int_property('year'));
    dbms_output.put_line('mileage: ' || message.get_long_property('mileage'));
    dbms_output.put_line('password: ' || message.get_byte_property('password'));

-- Shows how to retrieve the message payload of aq$_jms_bytes_message

-- Prepare call, send the content in the PL/SQL aq$_jms_bytes_message object to 
   -- Java stored procedure(Jserv) in the form of a byte array. 
   -- Passing -1 reserves a new slot in msg store of sys.aq$_jms_bytes_message.
   -- Max number of sys.aq$_jms_bytes_message type of messges to be operated at
   -- the same time in a session is 20. Call clean_body fn. with parameter -1 
   -- might result in ORA-24199 error if messages operated on are already 20. 
   -- You must call clean or clean_all function to clean up message store.
    id := message.prepare(-1);

-- Read data from BytesMessage paylaod. These fns. are analogy of JMS Java
-- API's. See the JMS Types chapter for detail.
    dbms_output.put_line('Payload:');

    -- read a byte from the BytesMessage payload
    dbms_output.put_line('read_byte:' || message.read_byte(id));

    -- read a byte array into a blob object from the BytesMessage payload
    dbms_output.put_line('read_bytes:');
    blob_len := message.read_bytes(id, blob_data, 272);
    display_blob(blob_data);

    -- read a char from the BytesMessage payload
    dbms_output.put_line('read_char:'|| message.read_char(id));

    -- read a double from the BytesMessage payload
    dbms_output.put_line('read_double:'|| message.read_double(id));

    -- read a float from the BytesMessage payload
    dbms_output.put_line('read_float:'|| message.read_float(id));

    -- read a int from the BytesMessage payload
    dbms_output.put_line('read_int:'|| message.read_int(id));

    -- read a long from the BytesMessage payload
    dbms_output.put_line('read_long:'|| message.read_long(id));

    -- read a short from the BytesMessage payload
    dbms_output.put_line('read_short:'|| message.read_short(id));

    -- read a String from the BytesMessage payload. 
    -- the String is in UTF8 encoding in the message payload
    dbms_output.put_line('read_utf:');
    message.read_utf(id, clob_data);
    display_clob(clob_data);

    -- Use either clean_all or clean to clean up the message store when the user 
    -- do not plan to do paylaod retrieving on this message anymore
    message.clean(id);
    -- sys.aq$_jms_bytes_message.clean_all();

    EXCEPTION 
    WHEN java_exp THEN
      dbms_output.put_line('exception information:');
      display_exp(sys.aq$_jms_bytes_message.get_exception());

END;
/

commit;

Example 16-4 Populating and Enqueuing a JMS StreamMessage

connect jmsuser/jmsuser 

SET ECHO ON
set serveroutput on

DECLARE

    id                 pls_integer;
    agent              sys.aq$_agent := sys.aq$_agent(' ', null, 0);
    message            sys.aq$_jms_stream_message;
    enqueue_options    dbms_aq.enqueue_options_t;
    message_properties dbms_aq.message_properties_t;
    msgid raw(16);

    java_exp           exception;
    pragma EXCEPTION_INIT(java_exp, -24197);
BEGIN

    -- Consturct a empty StreamMessage object
    message := sys.aq$_jms_stream_message.construct;

    -- Shows how to set the JMS header 
    message.set_replyto(agent);
    message.set_type('tkaqpet1');
    message.set_userid('jmsuser');
    message.set_appid('plsql_enq');
    message.set_groupid('st');
    message.set_groupseq(1);

    -- Shows how to set JMS user properties
    message.set_string_property('color', 'RED');
    message.set_int_property('year', 1999);
    message.set_float_property('price', 16999.99);
    message.set_long_property('mileage', 300000);
    message.set_boolean_property('import', True);
    message.set_byte_property('password', -127);

    -- Shows how to populate the message payload of aq$_jms_stream_message 

    -- Passing -1 reserve a new slot within the message store of sys.aq$_jms_stream_message.
    -- The maximum number of sys.aq$_jms_stream_message type of messges to be operated at
    -- the same time within a session is 20. Calling clean_body function with parameter -1 
    -- might result a ORA-24199 error if the messages currently operated is already 20. 
    -- The user is responsible to call clean or clean_all function to clean up message store. 
    id := message.clear_body(-1);

    -- Write data into the message paylaod. These functions are analogy of JMS JAVA api's.
    -- See the document for detail.

    -- Write a byte to the StreamMessage payload
    message.write_byte(id, 10);

    -- Write a RAW data as byte array to the StreamMessage payload
    message.write_bytes(id, UTL_RAW.XRANGE(HEXTORAW('00'), HEXTORAW('FF')));

    -- Write a portion of the RAW data as byte array to the StreamMessage payload
    -- Note the offset follows JAVA convention, starting from 0
    message.write_bytes(id, UTL_RAW.XRANGE(HEXTORAW('00'), HEXTORAW('FF')), 0, 16);

    -- Write a char to the StreamMessage payload
    message.write_char(id, 'A');

    -- Write a double to the StreamMessage payload
    message.write_double(id, 9999.99);

    -- Write a float to the StreamMessage payload
    message.write_float(id, 99.99);

    -- Write a int to the StreamMessage payload
    message.write_int(id, 12345);

    -- Write a long to the StreamMessage payload
    message.write_long(id, 1234567);

    -- Write a short to the StreamMessage payload
    message.write_short(id, 123);

    -- Write a String to the StreamMessage payload
    message.write_string(id, 'Hello World!');

    -- Flush the data from JAVA stored procedure (JServ) to PL/SQL side 
    -- Without doing this, the PL/SQL message is still empty. 
    message.flush(id);

    -- Use either clean_all or clean to clean up the message store when the user 
    -- do not plan to do paylaod population on this message anymore
    sys.aq$_jms_stream_message.clean_all();
    --message.clean(id);

    -- Enqueue this message into AQ queue using DBMS_AQ package
    dbms_aq.enqueue(queue_name => 'jmsuser.jms_stream_que',
                    enqueue_options => enqueue_options,
                    message_properties => message_properties,
                    payload => message,
                    msgid => msgid);


    EXCEPTION 
    WHEN java_exp THEN
      dbms_output.put_line('exception information:');
      display_exp(sys.aq$_jms_stream_message.get_exception());

END;
/

commit;

Example 16-5 Dequeuing and Retrieving Data From a JMS StreamMessage

connect jmsuser/jmsuser 

set echo on
set serveroutput on 

DECLARE

    id                 pls_integer;
    blob_data          blob;
    clob_data          clob;
    message            sys.aq$_jms_stream_message;
    agent              sys.aq$_agent;
    dequeue_options    dbms_aq.dequeue_options_t;
    message_properties dbms_aq.message_properties_t;
    msgid raw(16);
    gdata              sys.aq$_jms_value;

    java_exp           exception;
    pragma EXCEPTION_INIT(java_exp, -24197);
BEGIN
    DBMS_OUTPUT.ENABLE (20000);

    -- Dequeue this message from AQ queue using DBMS_AQ package
    dbms_aq.dequeue(queue_name => 'jmsuser.jms_stream_que',
                    dequeue_options => dequeue_options,
                    message_properties => message_properties,
                    payload => message,
                    msgid => msgid);

    -- Retrieve the header 
    agent := message.get_replyto;

    dbms_output.put_line('Type: ' || message.get_type || 
                         ' UserId: ' || message.get_userid || 
                         ' AppId: ' || message.get_appid || 
                         ' GroupId: ' || message.get_groupid || 
                         ' GroupSeq: ' || message.get_groupseq);

    -- Retrieve the user properties
    dbms_output.put_line('price: ' || message.get_float_property('price'));
    dbms_output.put_line('color: ' || message.get_string_property('color'));
    IF message.get_boolean_property('import') = TRUE THEN
       dbms_output.put_line('import: Yes' );
    ELSIF message.get_boolean_property('import') = FALSE THEN
       dbms_output.put_line('import: No' );
    END IF;
    dbms_output.put_line('year: ' || message.get_int_property('year'));
    dbms_output.put_line('mileage: ' || message.get_long_property('mileage'));
    dbms_output.put_line('password: ' || message.get_byte_property('password'));

    -- Shows how to retrieve the message payload of aq$_jms_stream_message

    -- The prepare call send the content in the PL/SQL aq$_jms_stream_message object to 
    -- JAVA stored procedure(Jserv) in the form of byte array. 
    -- Passing -1 reserve a new slot within the message store of sys.aq$_jms_stream_message.
    -- The maximum number of sys.aq$_jms_stream_message type of messges to be operated at
    -- the same time within a session is 20. Calling clean_body function with parameter -1 
    -- might result a ORA-24199 error if the messages currently operated is already 20. 
    -- The user is responsible to call clean or clean_all function to clean up message store.
    id := message.prepare(-1);


    -- Assume the users know the types of data in the StreamMessage payload. 
    -- The user can use the specific read function corresponding with the data type.
    -- These functions are analogy of JMS JAVA api's. See the document for detail.
    dbms_output.put_line('Retrieve payload by Type:');

    -- Read a byte from the StreamMessage payload
    dbms_output.put_line('read_byte:' || message.read_byte(id));

    -- Read a byte array into a blob object from the StreamMessage payload
    dbms_output.put_line('read_bytes:');
    message.read_bytes(id, blob_data);
    display_blob(blob_data);

    -- Read another byte array into a blob object from the StreamMessage payload
    dbms_output.put_line('read_bytes:');
    message.read_bytes(id, blob_data);
    display_blob(blob_data);

    -- Read a char from the StreamMessage payload
    dbms_output.put_line('read_char:'|| message.read_char(id));

    -- Read a double from the StreamMessage payload
    dbms_output.put_line('read_double:'|| message.read_double(id));

    -- Read a float from the StreamMessage payload
    dbms_output.put_line('read_float:'|| message.read_float(id));

    -- Read a int from the StreamMessage payload
    dbms_output.put_line('read_int:'|| message.read_int(id));

    -- Read a long from the StreamMessage payload
    dbms_output.put_line('read_long:'|| message.read_long(id));

    -- Read a short from the StreamMessage payload
    dbms_output.put_line('read_short:'|| message.read_short(id));

    -- Read a String into a clob data from the StreamMessage payload
    dbms_output.put_line('read_string:');
    message.read_string(id, clob_data);
    display_clob(clob_data);


    -- Assume the users do not know the types of data in the StreamMessage payload. 
    -- The user can use read_object method to read the data into a sys.aq$_jms_value object
    -- These functions are analogy of JMS JAVA api's. See the document for detail.

    -- Reset the stream pointer to the begining of the message so that we can read throught 
    -- the message payload again. 
    message.reset(id);

    LOOP
      message.read_object(id, gdata);
      IF gdata IS NULL THEN
        EXIT;
      END IF;

      CASE gdata.type
        WHEN sys.dbms_jms_plsql.DATA_TYPE_BYTE      THEN 
                 dbms_output.put_line('read_object/byte:' || gdata.num_val);
        WHEN sys.dbms_jms_plsql.DATA_TYPE_SHORT     THEN 
                 dbms_output.put_line('read_object/short:' || gdata.num_val); 
        WHEN sys.dbms_jms_plsql.DATA_TYPE_INTEGER   THEN 
                 dbms_output.put_line('read_object/int:' || gdata.num_val); 
        WHEN sys.dbms_jms_plsql.DATA_TYPE_LONG      THEN 
                 dbms_output.put_line('read_object/long:' || gdata.num_val); 
        WHEN sys.dbms_jms_plsql.DATA_TYPE_FLOAT     THEN 
                 dbms_output.put_line('read_object/float:' || gdata.num_val); 
        WHEN sys.dbms_jms_plsql.DATA_TYPE_DOUBLE    THEN 
                 dbms_output.put_line('read_object/double:' || gdata.num_val); 
        WHEN sys.dbms_jms_plsql.DATA_TYPE_BOOLEAN   THEN 
                 dbms_output.put_line('read_object/boolean:' || gdata.num_val); 
        WHEN sys.dbms_jms_plsql.DATA_TYPE_CHARACTER THEN 
                 dbms_output.put_line('read_object/char:' || gdata.char_val);
        WHEN sys.dbms_jms_plsql.DATA_TYPE_STRING    THEN 
                 dbms_output.put_line('read_object/string:'); 
                 display_clob(gdata.text_val);
        WHEN sys.dbms_jms_plsql.DATA_TYPE_BYTES     THEN 
                 dbms_output.put_line('read_object/bytes:'); 
                 display_blob(gdata.bytes_val);
        ELSE dbms_output.put_line('No such data type');
      END CASE;
 
    END LOOP;

    -- Use either clean_all or clean to clean up the message store when the user 
    -- do not plan to do paylaod retrieving on this message anymore
    message.clean(id);
    -- sys.aq$_jms_stream_message.clean_all();

    EXCEPTION 
    WHEN java_exp THEN
      dbms_output.put_line('exception information:');
      display_exp(sys.aq$_jms_stream_message.get_exception());

END;
/

commit;

Example 16-6 Populating and Enqueuing a JMS MapMessage

connect jmsuser/jmsuser 

SET ECHO ON
set serveroutput on

DECLARE

    id                 pls_integer;
    agent              sys.aq$_agent := sys.aq$_agent(' ', null, 0);
    message            sys.aq$_jms_map_message;
    enqueue_options    dbms_aq.enqueue_options_t;
    message_properties dbms_aq.message_properties_t;
    msgid raw(16);

    java_exp           exception;
    pragma EXCEPTION_INIT(java_exp, -24197);
BEGIN

    -- Consturct a empty map message object
    message := sys.aq$_jms_map_message.construct;

    -- Shows how to set the JMS header 
    message.set_replyto(agent);
    message.set_type('tkaqpet1');
    message.set_userid('jmsuser');
    message.set_appid('plsql_enq');
    message.set_groupid('st');
    message.set_groupseq(1);

    -- Shows how to set JMS user properties
    message.set_string_property('color', 'RED');
    message.set_int_property('year', 1999);
    message.set_float_property('price', 16999.99);
    message.set_long_property('mileage', 300000);
    message.set_boolean_property('import', True);
    message.set_byte_property('password', -127);
 
    -- Shows how to populate the message payload of aq$_jms_map_message 

    -- Passing -1 reserve a new slot within the message store of sys.aq$_jms_map_message.
    -- The maximum number of sys.aq$_jms_map_message type of messges to be operated at
    -- the same time within a session is 20. Calling clean_body function with parameter -1 
    -- might result a ORA-24199 error if the messages currently operated is already 20. 
    -- The user is responsible to call clean or clean_all function to clean up message store.
    id := message.clear_body(-1);

    -- Write data into the message paylaod. These functions are analogy of JMS JAVA api's.
    -- See the document for detail.

    -- Set a byte entry in map message payload
    message.set_byte(id, 'BYTE', 10);

    -- Set a byte array entry using RAW data in map message payload
    message.set_bytes(id, 'BYTES', UTL_RAW.XRANGE(HEXTORAW('00'), HEXTORAW('FF')));

    -- Set a byte array entry using only a portion of the RAW data in map message payload
    -- Note the offset follows JAVA convention, starting from 0
    message.set_bytes(id, 'BYTES_PART', UTL_RAW.XRANGE(HEXTORAW('00'), HEXTORAW('FF')), 0, 16);

    -- Set a char entry in map message payload
    message.set_char(id, 'CHAR', 'A');

    -- Set a double entry in map message payload
    message.set_double(id, 'DOUBLE', 9999.99);

    -- Set a float entry in map message payload
    message.set_float(id, 'FLOAT', 99.99);

    -- Set a int entry in map message payload
    message.set_int(id, 'INT', 12345);

    -- Set a long entry in map message payload
    message.set_long(id, 'LONG', 1234567);

    -- Set a short entry in map message payload
    message.set_short(id, 'SHORT', 123);

    -- Set a String entry in map message payload
    message.set_string(id, 'STRING', 'Hello World!');

    -- Flush the data from JAVA stored procedure (JServ) to PL/SQL side 
    -- Without doing this, the PL/SQL message is still empty.
    message.flush(id);

    -- Use either clean_all or clean to clean up the message store when the user 
    -- do not plan to do paylaod population on this message anymore
    sys.aq$_jms_map_message.clean_all();
    --message.clean(id);

    -- Enqueue this message into AQ queue using DBMS_AQ package
    dbms_aq.enqueue(queue_name => 'jmsuser.jms_map_que',
                    enqueue_options => enqueue_options,
                    message_properties => message_properties,
                    payload => message,
                    msgid => msgid);

END;
/

commit;

Example 16-7 Dequeuing and Retrieving Data From a JMS MapMessage

connect jmsuser/jmsuser 

set echo on
set serveroutput on

DECLARE

    id                 pls_integer;
    blob_data          blob;
    clob_data          clob;
    message            sys.aq$_jms_map_message;
    agent              sys.aq$_agent;
    dequeue_options    dbms_aq.dequeue_options_t;
    message_properties dbms_aq.message_properties_t;
    msgid              raw(16);
    name_arr           sys.aq$_jms_namearray;
    gdata              sys.aq$_jms_value;

    java_exp           exception;
    pragma EXCEPTION_INIT(java_exp, -24197);
BEGIN
    DBMS_OUTPUT.ENABLE (20000);

    -- Dequeue this message from AQ queue using DBMS_AQ package
    dbms_aq.dequeue(queue_name => 'jmsuser.jms_map_que',
                    dequeue_options => dequeue_options,
                    message_properties => message_properties,
                    payload => message,
                    msgid => msgid);

    -- Retrieve the header 
    agent := message.get_replyto;

    dbms_output.put_line('Type: ' || message.get_type || 
                         ' UserId: ' || message.get_userid || 
                         ' AppId: ' || message.get_appid || 
                         ' GroupId: ' || message.get_groupid || 
                         ' GroupSeq: ' || message.get_groupseq);

    -- Retrieve the user properties
    dbms_output.put_line('price: ' || message.get_float_property('price'));
    dbms_output.put_line('color: ' || message.get_string_property('color'));
    IF message.get_boolean_property('import') = TRUE THEN
       dbms_output.put_line('import: Yes' );
    ELSIF message.get_boolean_property('import') = FALSE THEN
       dbms_output.put_line('import: No' );
    END IF;
    dbms_output.put_line('year: ' || message.get_int_property('year'));
    dbms_output.put_line('mileage: ' || message.get_long_property('mileage'));
    dbms_output.put_line('password: ' || message.get_byte_property('password'));


    -- Shows how to retrieve the message payload of aq$_jms_map_message

    -- 'Prepare' sends the content in the PL/SQL aq$_jms_map_message object to 
    -- Java stored procedure(Jserv) in the form of byte array. 
    -- Passing -1 reserve a new slot within the message store of 
    -- sys.aq$_jms_map_message. The maximum number of sys.aq$_jms_map_message
    -- type of messges to be operated at the same time within a session is 20.
    -- Calling clean_body function with parameter -1 
    -- might result a ORA-24199 error if the messages currently operated is
    -- already 20. The user is responsible to call clean or clean_all function
    -- to clean up message store.
    id := message.prepare(-1);

    -- Assume the users know the names and types in the map message payload. 
    -- The user can use names to get the corresponsing values.
    -- These functions are analogous to JMS Java API's. See JMS Types chapter
    -- for detail.
    dbms_output.put_line('Retrieve payload by Name:');

    -- Get a byte entry from the map message payload
    dbms_output.put_line('get_byte:' || message.get_byte(id, 'BYTE'));

    -- Get a byte array entry from the map message payload
    dbms_output.put_line('get_bytes:');
    message.get_bytes(id, 'BYTES', blob_data);
    display_blob(blob_data);

    -- Get another byte array entry from the map message payload
    dbms_output.put_line('get_bytes:');
    message.get_bytes(id, 'BYTES_PART', blob_data);
    display_blob(blob_data);

    -- Get a char entry from the map message payload
    dbms_output.put_line('get_char:'|| message.get_char(id, 'CHAR'));

    -- get a double entry from the map message payload
    dbms_output.put_line('get_double:'|| message.get_double(id, 'DOUBLE'));

    -- Get a float entry from the map message payload
    dbms_output.put_line('get_float:'|| message.get_float(id, 'FLOAT'));

    -- Get a int entry from the map message payload
    dbms_output.put_line('get_int:'|| message.get_int(id, 'INT'));

    -- Get a long entry from the map message payload
    dbms_output.put_line('get_long:'|| message.get_long(id, 'LONG'));

    -- Get a short entry from the map message payload
    dbms_output.put_line('get_short:'|| message.get_short(id, 'SHORT'));

    -- Get a String entry from the map message payload
    dbms_output.put_line('get_string:');
    message.get_string(id, 'STRING', clob_data);
    display_clob(clob_data);

    -- Assume users do not know names and types in map message payload. 
    -- User can first retrieve the name array containing all names in the
    -- payload and iterate through the name list and get the corresponding
    -- value. These functions are analogous to JMS Java API's. 
    -- See JMS Type chapter for detail.
    dbms_output.put_line('Retrieve payload by iteration:');

    -- Get the name array from the map message payload
    name_arr := message.get_names(id);

    -- Iterate through the name array to retrieve the value for each of the name.
    FOR i IN name_arr.FIRST..name_arr.LAST LOOP

    -- Test if a name exist in the map message payload
    -- (It is not necessary in this case, just a demostration on how to use it)
      IF message.item_exists(id, name_arr(i)) THEN
        dbms_output.put_line('item exists:'||name_arr(i));

    -- Because we do not know the type of entry, we must use sys.aq$_jms_value 
    -- type object for the data returned 
       message.get_object(id, name_arr(i), gdata);
       IF gdata IS NOT NULL THEN
        CASE gdata.type
        WHEN   sys.dbms_jms_plsql.DATA_TYPE_BYTE
          THEN dbms_output.put_line('get_object/byte:' || gdata.num_val);
        WHEN   sys.dbms_jms_plsql.DATA_TYPE_SHORT
          THEN dbms_output.put_line('get_object/short:' || gdata.num_val); 
        WHEN   sys.dbms_jms_plsql.DATA_TYPE_INTEGER
          THEN dbms_output.put_line('get_object/int:' || gdata.num_val); 
        WHEN   sys.dbms_jms_plsql.DATA_TYPE_LONG
          THEN dbms_output.put_line('get_object/long:' || gdata.num_val); 
        WHEN   sys.dbms_jms_plsql.DATA_TYPE_FLOAT
          THEN dbms_output.put_line('get_object/float:' || gdata.num_val); 
        WHEN   sys.dbms_jms_plsql.DATA_TYPE_DOUBLE
          THEN dbms_output.put_line('get_object/double:' || gdata.num_val); 
        WHEN   sys.dbms_jms_plsql.DATA_TYPE_BOOLEAN
          THEN dbms_output.put_line('get_object/boolean:' || gdata.num_val); 
        WHEN   sys.dbms_jms_plsql.DATA_TYPE_CHARACTER 
          THEN dbms_output.put_line('get_object/char:' || gdata.char_val);
        WHEN   sys.dbms_jms_plsql.DATA_TYPE_STRING
          THEN dbms_output.put_line('get_object/string:'); 
               display_clob(gdata.text_val);
        WHEN sys.dbms_jms_plsql.DATA_TYPE_BYTES
        THEN 
             dbms_output.put_line('get_object/bytes:'); 
             display_blob(gdata.bytes_val);
          ELSE dbms_output.put_line('No such data type');
          END CASE;
        END IF;
      ELSE
        dbms_output.put_line('item not exists:'||name_arr(i));
      END IF;
 
    END LOOP;


    -- Use either clean_all or clean to clean up the message store when the user 
    -- do not plan to do paylaod population on this message anymore
    message.clean(id);
    -- sys.aq$_jms_map_message.clean_all();

    EXCEPTION 
    WHEN java_exp THEN
      dbms_output.put_line('exception information:');
      display_exp(sys.aq$_jms_stream_message.get_exception());

END;
/

commit;

Example 16-8 Enqueuing a Large TextMessage

DECLARE 

    text        varchar2(32767); 
    agent       sys.aq$_agent   := sys.aq$_agent(' ', null, 0); 
    message     sys.aq$_jms_text_message; 

    enqueue_options    dbms_aq.enqueue_options_t; 
    message_properties dbms_aq.message_properties_t; 
    msgid               raw(16); 

BEGIN 

    message := sys.aq$_jms_text_message.construct; 

    message.set_replyto(agent); 
    message.set_type('tkaqpet2'); 
    message.set_userid('jmsuser'); 
    message.set_appid('plsql_enq'); 
    message.set_groupid('st'); 
    message.set_groupseq(1); 

    message.set_boolean_property('import', True); 
    message.set_string_property('color', 'RED'); 
    message.set_short_property('year', 1999); 
    message.set_long_property('mileage', 300000); 
    message.set_double_property('price', 16999.99); 
    message.set_byte_property('password', 127); 

    FOR i IN 1..500 LOOP 
        text := CONCAT (text, '1234567890'); 
    END LOOP; 

    message.set_text(text); 

    dbms_aq.enqueue(queue_name => 'jmsuser.jms_text_t1', 
                       enqueue_options => enqueue_options, 
                       message_properties => message_properties, 
                       payload => message, 
                       msgid => msgid); 

END; 

Example 16-9 Enqueuing a Large BytesMessage

DECLARE 

    text        VARCHAR2(32767); 
    bytes       RAW(32767); 
    agent       sys.aq$_agent   := sys.aq$_agent(' ', null, 0); 
    message     sys.aq$_jms_bytes_message; 
    body        BLOB; 
    position    INT; 

    enqueue_options    dbms_aq.enqueue_options_t; 
    message_properties dbms_aq.message_properties_t; 
    msgid raw(16); 

BEGIN 

    message := sys.aq$_jms_bytes_message.construct; 

    message.set_replyto(agent); 
    message.set_type('tkaqper4'); 
    message.set_userid('jmsuser'); 
    message.set_appid('plsql_enq_raw'); 
    message.set_groupid('st'); 
    message.set_groupseq(1); 

    message.set_boolean_property('import', True); 
    message.set_string_property('color', 'RED'); 
    message.set_short_property('year', 1999); 
    message.set_long_property('mileage', 300000); 
    message.set_double_property('price', 16999.99); 

--  prepare a huge payload into a blob 

    FOR i IN 1..1000 LOOP 
        text := CONCAT (text, '0123456789ABCDEF'); 
    END LOOP; 

    bytes := HEXTORAW(text); 

    dbms_lob.createtemporary(lob_loc => body, cache => TRUE); 
    dbms_lob.open (body, DBMS_LOB.LOB_READWRITE); 
    position := 1 ; 
    FOR i IN 1..10 LOOP 
        dbms_lob.write ( lob_loc => body, 
                amount => FLOOR((LENGTH(bytes)+1)/2), 
                offset => position, 
                buffer => bytes); 
        position := position + FLOOR((LENGTH(bytes)+1)/2) ; 
    END LOOP; 

-- end of the preparation 

    message.set_bytes(body); 
    dbms_aq.enqueue(queue_name => 'jmsuser.jms_bytes_t1', 
                       enqueue_options => enqueue_options, 
                       message_properties => message_properties, 
                       payload => message, 
                       msgid => msgid); 

    dbms_lob.freetemporary(lob_loc => body); 
END;