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Oracle® Streams Advanced Queuing User's Guide and Reference
10g Release 2 (10.2)
Part Number B14257-01
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12 Oracle JMS Basic Operations

This chapter describes the basic operational Java Message Service (JMS) administrative interface to Oracle Streams Advanced Queuing (AQ).

This chapter contains these topics:

12.1 EXECUTE Privilege on DBMS_AQIN

Users should never directly call methods in the DBMS_AQIN package, but they do need the EXECUTE privilege on DBMS_AQIN. Use the following syntax to accomplish this:

GRANT EXECUTE ON DBMS_AQIN to user;

12.2 Registering a ConnectionFactory

You can register a ConnectionFactory four ways:

12.2.1 Registering Through the Database Using JDBC Connection Parameters

public static int registerConnectionFactory(java.sql.Connection connection,
                                            java.lang.String conn_name,
                                            java.lang.String hostname,
                                            java.lang.String oracle_sid,
                                            int portno,
                                            java.lang.String driver,
                                            java.lang.String type)
                                     throws JMSException

This method registers a QueueConnectionFactory or TopicConnectionFactory through the database to a Lightweight Directory Access Protocol (LDAP) server with JDBC connection parameters. This method is static and has the following parameters:

Parameter Description
connection JDBC connection used in registration
conn_name Name of the connection to be registered
hostname Name of the host running Oracle Streams AQ
oracle_sid Oracle system identifier
portno Port number
driver JDBC driver type
type Connection factory type (QUEUE or TOPIC)

The database connection passed to registerConnectionFactory must be granted AQ_ADMINISTRATOR_ROLE. After registration, you can look up the connection factory using Java Naming and Directory Interface (JNDI).

Example 12-1 Registering Through the Database Using JDBC Connection Parameters

String               url;
java.sql.connection  db_conn;

url = "jdbc:oracle:thin:@sun-123:1521:db1";
db_conn = DriverManager.getConnection(url, "scott", "tiger");
AQjmsFactory.registerConnectionFactory(
   db_conn, "queue_conn1", "sun-123", "db1", 1521, "thin", "queue");

12.2.2 Registering Through the Database Using a JDBC URL

public static int registerConnectionFactory(java.sql.Connection connection,
                                            java.lang.String conn_name,
                                            java.lang.String jdbc_url,
                                            java.util.Properties info,
                                            java.lang.String type)
                                     throws JMSException

This method registers a QueueConnectionFactory or TopicConnectionFactory through the database with a JDBC URL to LDAP. It is static and has the following parameters:

Parameter Description
connection JDBC connection used in registration
conn_name Name of the connection to be registered
jdbc_url URL to connect to
info Properties information
portno Port number
type Connection factory type (QUEUE or TOPIC)

The database connection passed to registerConnectionFactory must be granted AQ_ADMINISTRATOR_ROLE. After registration, you can look up the connection factory using JNDI.

Example 12-2 Registering Through the Database Using a JDBC URL

String                        url;
java.sql.connection           db_conn;

url = "jdbc:oracle:thin:@sun-123:1521:db1";
db_conn = DriverManager.getConnection(url, "scott", "tiger");
AQjmsFactory.registerConnectionFactory(
   db_conn, "topic_conn1", url, null, "topic");

12.2.3 Registering Through LDAP Using JDBC Connection Parameters 

public static int registerConnectionFactory(java.util.Hashtable env,
                                            java.lang.String conn_name,
                                            java.lang.String hostname,
                                            java.lang.String oracle_sid,
                                            int portno,
                                            java.lang.String driver,
                                            java.lang.String type)
                                     throws JMSException

This method registers a QueueConnectionFactory or TopicConnectionFactory through LDAP with JDBC connection parameters to LDAP. It is static and has the following parameters:

Parameter Description
env Environment of LDAP connection
conn_name Name of the connection to be registered
hostname Name of the host running Oracle Streams AQ
oracle_sid Oracle system identifier
portno Port number
driver JDBC driver type
type Connection factory type (QUEUE or TOPIC)

The hash table passed to registerConnectionFactory() must contain all the information to establish a valid connection to the LDAP server. Furthermore, the connection must have write access to the connection factory entries in the LDAP server (which requires the LDAP user to be either the database itself or be granted GLOBAL_AQ_USER_ROLE). After registration, look up the connection factory using JNDI.

Example 12-3 Registering Through LDAP Using JDBC Connection Parameters

Hashtable            env = new Hashtable(5, 0.75f);
/* the following statements set in hashtable env:
   * service provider package
   * the URL of the ldap server
   * the distinguished name of the database server
   * the authentication method (simple)
   * the LDAP username
   * the LDAP user password
*/
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://sun-456:389");
env.put("searchbase", "cn=db1,cn=Oraclecontext,cn=acme,cn=com");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=db1aqadmin,cn=acme,cn=com");
env.put(Context.SECURITY_CREDENTIALS, "welcome");

AQjmsFactory.registerConnectionFactory(env, 
                                       "queue_conn1", 
                                       "sun-123",
                                       "db1", 
                                       1521, 
                                       "thin", 
                                       "queue");

12.2.4 Registering Through LDAP Using a JDBC URL

public static int registerConnectionFactory(java.util.Hashtable env,
                                            java.lang.String conn_name,
                                            java.lang.String jdbc_url,
                                            java.util.Properties info,
                                            java.lang.String type)
                                     throws JMSException

This method registers a QueueConnectionFactory or TopicConnectionFactory through LDAP with JDBC connection parameters to LDAP. It is static and has the following parameters:

Parameter Description
env Environment of LDAP connection
conn_name Name of the connection to be registered
jdbc_url URL to connect to
info Properties information
type Connection factory type (QUEUE or TOPIC)

The hash table passed to registerConnectionFactory() must contain all the information to establish a valid connection to the LDAP server. Furthermore, the connection must have write access to the connection factory entries in the LDAP server (which requires the LDAP user to be either the database itself or be granted GLOBAL_AQ_USER_ROLE). After registration, look up the connection factory using JNDI.

Example 12-4 Registering Through LDAP Using a JDBC URL

String               url;
Hashtable            env = new Hashtable(5, 0.75f);

/* the following statements set in hashtable env:
   * service provider package
   * the URL of the ldap server
   * the distinguished name of the database server
   * the authentication method (simple)
   * the LDAP username
   * the LDAP user password
*/
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://sun-456:389");
env.put("searchbase", "cn=db1,cn=Oraclecontext,cn=acme,cn=com");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=db1aqadmin,cn=acme,cn=com");
env.put(Context.SECURITY_CREDENTIALS, "welcome");
url = "jdbc:oracle:thin:@sun-123:1521:db1";
AQjmsFactory.registerConnectionFactory(env, "topic_conn1", url, null, "topic");

12.3 Unregistering a Queue/Topic ConnectionFactory

You can unregister a queue/topic ConnectionFactory in LDAP two ways:

12.3.1 Unregistering Through the Database

public static int unregisterConnectionFactory(java.sql.Connection connection,
                                              java.lang.String conn_name)
                                       throws JMSException

This method unregisters a QueueConnectionFactory or TopicConnectionFactory in LDAP. It is static and has the following parameters:

Parameter Description
connection JDBC connection used in registration
conn_name Name of the connection to be registered

The database connection passed to unregisterConnectionFactory() must be granted AQ_ADMINISTRATOR_ROLE.

Example 12-5 Unregistering Through the Database

String               url;
java.sql.connection  db_conn;

url = "jdbc:oracle:thin:@sun-123:1521:db1";
db_conn = DriverManager.getConnection(url, "scott", "tiger");
AQjmsFactory.unregisterConnectionFactory(db_conn, "topic_conn1");

12.3.2 Unregistering Through LDAP

public static int unregisterConnectionFactory(java.util.Hashtable env,
                                              java.lang.String conn_name)
                                       throws JMSException

This method unregisters a QueueConnectionFactory or TopicConnectionFactory in LDAP. It is static and has the following parameters:

Parameter Description
env Environment of LDAP connection
conn_name Name of the connection to be registered

The hash table passed to unregisterConnectionFactory() must contain all the information to establish a valid connection to the LDAP server. Furthermore, the connection must have write access to the connection factory entries in the LDAP server (which requires the LDAP user to be either the database itself or be granted GLOBAL_AQ_USER_ROLE).

Example 12-6 Unregistering Through LDAP

Hashtable            env = new Hashtable(5, 0.75f);

/* the following statements set in hashtable env:
   * service provider package
   * the distinguished name of the database server
   * the authentication method (simple)
   * the LDAP username
   * the LDAP user password
*/
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://sun-456:389");
env.put("searchbase", "cn=db1,cn=Oraclecontext,cn=acme,cn=com");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=db1aqadmin,cn=acme,cn=com");
env.put(Context.SECURITY_CREDENTIALS, "welcome");
url = "jdbc:oracle:thin:@sun-123:1521:db1";
AQjmsFactory.unregisterConnectionFactory(env, "queue_conn1");

12.4 Getting a QueueConnectionFactory or TopicConnectionFactory

This section contains these topics:

12.4.1 Getting a QueueConnectionFactory with JDBC URL

public static javax.jms.QueueConnectionFactory getQueueConnectionFactory(
              java.lang.String jdbc_url,
              java.util.Properties info)
       throws JMSException

This method gets a QueueConnectionFactory with JDBC URL. It is static and has the following parameters:

Parameter Description
jdbc_url URL to connect to
info Properties information

Example 12-7 Getting a QueueConnectionFactory with JDBC URL

String      url          = "jdbc:oracle:oci10:internal/oracle"
 Properties  info         = new Properties();
 QueueConnectionFactory   qc_fact;

 info.put("internal_logon", "sysdba");
 qc_fact = AQjmsFactory.getQueueConnectionFactory(url, info);

12.4.2 Getting a QueueConnectionFactory with JDBC Connection Parameters

public static javax.jms.QueueConnectionFactory getQueueConnectionFactory(
              java.lang.String hostname,
              java.lang.String oracle_sid,
              int portno,
              java.lang.String driver)
       throws JMSException

This method gets a QueueConnectionFactory with JDBC connection parameters. It is static and has the following parameters:

Parameter Description
hostname Name of the host running Oracle Streams AQ
oracle_sid Oracle system identifier
portno Port number
driver JDBC driver type

Example 12-8 Getting a QueueConnectionFactory with JDBC Connection Parameters

String      host         = "dlsun";
 String      ora_sid      = "rdbms10i"
 String      driver       = "thin";
 int         port         = 5521;
 QueueConnectionFactory   qc_fact;

 qc_fact = AQjmsFactory.getQueueConnectionFactory(host, ora_sid, port, driver);

12.4.3 Getting a TopicConnectionFactory with JDBC URL

public static javax.jms.QueueConnectionFactory getQueueConnectionFactory(
              java.lang.String jdbc_url,
              java.util.Properties info)
       throws JMSException

This method gets a TopicConnectionFactory with a JDBC URL. It is static and has the following parameters:

Parameter Description
jdbc_url URL to connect to
info Properties information

Example 12-9 Getting a TopicConnectionFactory with JDBC URL

String      url          = "jdbc:oracle:oci10:internal/oracle"
 Properties  info         = new Properties();
 TopicConnectionFactory   tc_fact;

 info.put("internal_logon", "sysdba");
 tc_fact = AQjmsFactory.getTopicConnectionFactory(url, info);

12.4.4 Getting a TopicConnectionFactory with JDBC Connection Parameters

public static javax.jms.TopicConnectionFactory getTopicConnectionFactory(
              java.lang.String hostname,
              java.lang.String oracle_sid,
              int portno,
              java.lang.String driver)
       throws JMSException

This method gets a TopicConnectionFactory with JDBC connection parameters. It is static and has the following parameters:

Parameter Description
hostname Name of the host running Oracle Streams AQ
oracle_sid Oracle system identifier
portno Port number
driver JDBC driver type

Example 12-10 Getting a TopicConnectionFactory with JDBC Connection Parameters

String      host         = "dlsun";
String      ora_sid      = "rdbms10i"
String      driver       = "thin";
int         port         = 5521;
TopicConnectionFactory   tc_fact;

tc_fact = AQjmsFactory.getTopicConnectionFactory(host, ora_sid, port, driver);

12.4.5 Getting a QueueConnectionFactory or TopicConnectionFactory in LDAP

This method gets a QueueConnectionFactory or TopicConnectionFactory from LDAP.

Example 12-11 Getting a QueueConnectionFactory or TopicConnectionFactory in LDAP

Hashtable              env = new Hashtable(5, 0.75f);
DirContext             ctx;
queueConnectionFactory qc_fact;

/* the following statements set in hashtable env:
   * service provider package
   * the URL of the ldap server
   * the distinguished name of the database server
   * the authentication method (simple)
   * the LDAP username
   * the LDAP user password
*/
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://sun-456:389");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=db1aquser1,cn=acme,cn=com");
env.put(Context.SECURITY_CREDENTIALS, "welcome");

ctx = new InitialDirContext(env);
ctx = (DirContext)ctx.lookup("cn=OracleDBConnections,cn=db1,cn=Oraclecontext,cn=acme,cn=com");
qc_fact = (queueConnectionFactory)ctx.lookup("cn=queue_conn1");

12.5 Getting a Queue or Topic in LDAP

This method gets a queue or topic from LDAP.

Example 12-12 Getting a Queue or Topic in LDAP

Hashtable              env = new Hashtable(5, 0.75f);
DirContext             ctx;
topic                  topic_1;

/* the following statements set in hashtable env:
   * service provider package
   * the URL of the ldap server
   * the distinguished name of the database server
   * the authentication method (simple)
   * the LDAP username
   * the LDAP user password
*/
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
env.put(Context.PROVIDER_URL, "ldap://sun-456:389");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
env.put(Context.SECURITY_PRINCIPAL, "cn=db1aquser1,cn=acme,cn=com");
env.put(Context.SECURITY_CREDENTIALS, "welcome");

ctx = new InitialDirContext(env);
ctx = (DirContext)ctx.lookup("cn=OracleDBQueues,cn=db1,cn=Oraclecontext,cn=acme,cn=com");
topic_1 = (topic)ctx.lookup("cn=topic_1");

12.6 Creating a Queue Table

public oracle.AQ.AQQueueTable createQueueTable(
                 java.lang.String owner,
                 java.lang.String name,
                 oracle.AQ.AQQueueTableProperty property)
          throws JMSException

This method creates a queue table. It has the following parameters:

Parameter Description
owner Queue table owner (schema)
name Queue table name
property Queue table properties

If the queue table is used to hold queues, then the queue table must not be multiconsumer enabled (default). If the queue table is used to hold topics, then the queue table must be multiconsumer enabled.

CLOB, BLOB, and BFILE objects are valid attributes for an Oracle Streams AQ object type load. However, only CLOB and BLOB can be propagated using Oracle Streams AQ propagation in Oracle8i and after.

Example 12-13 Creating a Queue Table

QueueSession              q_sess    = null;
AQQueueTable              q_table   = null;
AQQueueTableProperty      qt_prop   = null;

qt_prop = new AQQueueTableProperty("SYS.AQ$_JMS_BYTES_MESSAGE");
q_table = ((AQjmsSession)q_sess).createQueueTable(
    "boluser", "bol_ship_queue_table", qt_prop);

12.7 Getting a Queue Table

public oracle.AQ.AQQueueTable getQueueTable(java.lang.String owner,
                                            java.lang.String name)
                                     throws JMSException

This method gets a queue table. It has the following parameters:

Parameter Description
owner Queue table owner (schema)
name Queue table name

If the caller that opened the connection is not the owner of the queue table, then the caller must have Oracle Streams AQ enqueue/dequeue privileges on queues/topics in the queue table. Otherwise the queue table is not returned.

Example 12-14 Getting a Queue Table

QueueSession              q_sess;
AQQueueTable              q_table;

q_table = ((AQjmsSession)q_sess).getQueueTable(
   "boluser", "bol_ship_queue_table");

12.8 Creating a Queue

This section contains these topics:

12.8.1 Creating a Point-to-Point Queue

public javax.jms.Queue createQueue(
             oracle.AQ.AQQueueTable q_table,
             java.lang.String queue_name,
             oracle.jms.AQjmsDestinationProperty dest_property)
      throws JMSException

This method creates a queue in a specified queue table. It has the following parameters:

Parameter Description
q_table Queue table in which the queue is to be created. The queue table must be single-consumer.
queue_name Name of the queue to be created
dest_property Queue properties

This method is specific to OJMS. You cannot use standard Java javax.jms.Session objects with it. Instead, you must cast the standard type to the OJMS concrete class oracle.jms.AQjmsSession.

Example 12-15 Creating a Point-to-Point Queue

QueueSession             q_sess;
AQQueueTable             q_table;
AqjmsDestinationProperty dest_prop;
Queue                    queue;

queue = ((AQjmsSession)q_sess).createQueue(q_table, "jms_q1", dest_prop);

12.8.2 Creating a Publish/Subscribe Topic

public javax.jms.Topic createTopic(
             oracle.AQ.AQQueueTable q_table,
             java.lang.String topic_name,
             oracle.jms.AQjmsDestinationProperty dest_property)
      throws JMSException

This method creates a topic in the publish/subscribe model. It has the following parameters:

Parameter Description
q_table Queue table in which the queue is to be created. The queue table must be multiconsumer.
queue_name Name of the queue to be created
dest_property Queue properties

This method is specific to OJMS. You cannot use standard Java javax.jms.Session objects with it. Instead, you must cast the standard type to the OJMS concrete class oracle.jms.AQjmsSession.

Example 12-16 Creating a Publish/Subscribe Topic

TopicSession             t_sess;
AQQueueTable             q_table;
AqjmsDestinationProperty dest_prop;
Topic                    topic;

topic = ((AQjmsSessa)t_sess).createTopic(q_table, "jms_t1", dest_prop);

In Example 12-17, if an order cannot be filled because of insufficient inventory, then the transaction processing the order is terminated. The bookedorders topic is set up with max_retries = 4 and retry_delay = 12 hours.Thus, if an order is not filled up in two days, then it is moved to an exception queue.

Example 12-17 Specifying Max Retries and Max Delays in Messages

public BolOrder process_booked_order(TopicSession jms_session)
  {
    Topic            topic;
    TopicSubscriber  tsubs;
    ObjectMessage    obj_message;
    BolCustomer      customer;
    BolOrder         booked_order = null;
    String           country;
    int              i = 0;

    try
    {
      /* get a handle to the OE_bookedorders_topic */
      topic = ((AQjmsSession)jms_session).getTopic("WS",
                                                   "WS_bookedorders_topic");

      /* Create local subscriber - to track messages for Western Region  */
      tsubs = jms_session.createDurableSubscriber(topic, "SUBS1",
                                       "Region = 'Western' ",
                                                   false);

       /* wait for a message to show up in the topic */
       obj_message = (ObjectMessage)tsubs.receive(10);

       booked_order = (BolOrder)obj_message.getObject();

       customer = booked_order.getCustomer();
       country    = customer.getCountry();

       if (country == "US")
       {
          jms_session.commit();
       }
       else
       {
          jms_session.rollback();
          booked_order = null;
       }
    }catch (JMSException ex)
    { System.out.println("Exception " + ex) ;}

     return booked_order;
   }

12.9 Granting and Revoking Privileges

This section contains these topics:

12.9.1 Granting Oracle Streams AQ System Privileges

public void grantSystemPrivilege(java.lang.String privilege,
                                 java.lang.String grantee,
                                 boolean admin_option)
                          throws JMSException

This method grants Oracle Streams AQ system privileges to a user or role.

Parameter Description
privilege ENQUEUE_ANY, DEQUEUE_ANY or MANAGE_ANY
grantee Grantee (user, role, or PUBLIC)
admin_option If this is set to true, then the grantee is allowed to use this procedure to grant the system privilege to other users or roles

Initially only SYS and SYSTEM can use this procedure successfully. Users granted the ENQUEUE_ANY privilege are allowed to enqueue messages to any queues in the database. Users granted the DEQUEUE_ANY privilege are allowed to dequeue messages from any queues in the database. Users granted the MANAGE_ANY privilege are allowed to run DBMS_AQADM calls on any schemas in the database.

Example 12-18 Granting Oracle Streams AQ System Privileges

TopicSession             t_sess;

((AQjmsSession)t_sess).grantSystemPrivilege("ENQUEUE_ANY", "scott", false);

12.9.2 Revoking Oracle Streams AQ System Privileges

public void revokeSystemPrivilege(java.lang.String privilege,
                                  java.lang.String grantee)
                           throws JMSException

This method revokes Oracle Streams AQ system privileges from a user or role. It has the following parameters:

Parameter Description
privilege ENQUEUE_ANY, DEQUEUE_ANY or MANAGE_ANY
grantee Grantee (user, role, or PUBLIC)

Users granted the ENQUEUE_ANY privilege are allowed to enqueue messages to any queues in the database. Users granted the DEQUEUE_ANY privilege are allowed to dequeue messages from any queues in the database. Users granted the MANAGE_ANY privilege are allowed to run DBMS_AQADM calls on any schemas in the database.

Example 12-19 Revoking Oracle Streams AQ System Privileges

TopicSession             t_sess;

((AQjmsSession)t_sess).revokeSystemPrivilege("ENQUEUE_ANY", "scott");

12.9.3 Granting Publish/Subscribe Topic Privileges

public void grantTopicPrivilege(javax.jms.Session session,
                                java.lang.String privilege,
                                java.lang.String grantee,
                                boolean grant_option)
                         throws JMSException

This method grants a topic privilege in the publish/subscribe model. Initially only the queue table owner can use this procedure to grant privileges on the topic. It has the following parameters:

Parameter Description
session JMS session
privilege ENQUEUE, DEQUEUE, or ALL (ALL means both.)
grantee Grantee (user, role, or PUBLIC)
grant_option If this is set to true, then the grantee is allowed to use this procedure to grant the system privilege to other users or roles

Example 12-20 Granting Publish/Subscribe Topic Privileges

TopicSession             t_sess;
Topic                    topic;

((AQjmsDestination)topic).grantTopicPrivilege(
   t_sess, "ENQUEUE", "scott", false);

12.9.4 Revoking Publish/Subscribe Topic Privileges

public void revokeTopicPrivilege(javax.jms.Session session,
                                 java.lang.String privilege,
                                 java.lang.String grantee)
                          throws JMSException

This method revokes a topic privilege in the publish/subscribe model. It has the following parameters:

Parameter Description
session JMS session
privilege ENQUEUE, DEQUEUE, or ALL (ALL means both.)
grantee Revoked grantee (user, role, or PUBLIC)

Example 12-21 Revoking Publish/Subscribe Topic Privileges

TopicSession             t_sess;
Topic                    topic;

((AQjmsDestination)topic).revokeTopicPrivilege(t_sess, "ENQUEUE", "scott");

12.9.5 Granting Point-to-Point Queue Privileges

public void grantQueuePrivilege(javax.jms.Session session,
                                java.lang.String privilege,
                                java.lang.String grantee,
                                boolean grant_option)
                         throws JMSException

This method grants a queue privilege in the point-to-point model. Initially only the queue table owner can use this procedure to grant privileges on the queue. It has the following parameters:

Parameter Description
session JMS session
privilege ENQUEUE, DEQUEUE, or ALL (ALL means both.)
grantee Grantee (user, role, or PUBLIC)
grant_option If this is set to true, then the grantee is allowed to use this procedure to grant the system privilege to other users or roles

Example 12-22 Granting Point-to-Point Queue Privileges

QueueSession             q_sess;
Queue                    queue;

((AQjmsDestination)queue).grantQueuePrivilege(
   q_sess, "ENQUEUE", "scott", false);

12.9.6 Revoking Point-to-Point Queue Privileges

public void revokeQueuePrivilege(javax.jms.Session session,
                                 java.lang.String privilege,
                                 java.lang.String grantee)
                          throws JMSException

This method revokes queue privileges in the point-to-point model. Initially only the queue table owner can use this procedure to grant privileges on the queue. It has the following parameters:

Parameter Description
session JMS session
privilege ENQUEUE, DEQUEUE, or ALL (ALL means both.)
grantee Revoked grantee (user, role, or PUBLIC)

To revoke a privilege, the revoker must be the original grantor of the privilege. Privileges propagated through the GRANT option are revoked if the grantor privilege is also revoked.

Example 12-23 Revoking Point-to-Point Queue Privileges

QueueSession             q_sess;
Queue                    queue;

((AQjmsDestination)queue).revokeQueuePrivilege(q_sess, "ENQUEUE", "scott");

12.10 Managing Destinations

This section contains these topics:

12.10.1 Starting a Destination

public void start(javax.jms.Session session,
                  boolean enqueue,
                  boolean dequeue)
           throws JMSException

This method starts a destination. It has the following parameters:

Parameter Description
session JMS session
enqueue If set to TRUE, then enqueue is enabled
dequeue If set to TRUE, then dequeue is enabled

Example 12-24 Starting a Destination

TopicSession t_sess;
QueueSession q_sess;
Topic        topic;
Queue        queue;

(AQjmsDestination)topic.start(t_sess, true, true);
(AQjmsDestination)queue.start(q_sess, true, true);

12.10.2 Stopping a Destination

public void stop(javax.jms.Session session,
                 boolean enqueue,
                 boolean dequeue,
                 boolean wait)
          throws JMSException

This method stops a destination. It has the following parameters:

Parameter Description
session JMS session
enqueue If set to TRUE, then enqueue is disabled
dequeue If set to TRUE, then dequeue is disabled
wait If set to true, then pending transactions on the queue/topic are allowed to complete before the destination is stopped

Example 12-25 Stopping a Destination

TopicSession t_sess;
Topic        topic;

((AQjmsDestination)topic).stop(t_sess, true, false);

12.10.3 Altering a Destination

public void alter(javax.jms.Session session,
                  oracle.jms.AQjmsDestinationProperty dest_property)
           throws JMSException

This method alters a destination. It has the following properties:

Parameter Description
session JMS session
dest_property New properties of the queue or topic

Example 12-26 Altering a Destination

QueueSession q_sess;
Queue        queue;
TopicSession t_sess;
Topic        topic;
AQjmsDestionationProperty dest_prop1, dest_prop2;

((AQjmsDestination)queue).alter(dest_prop1);
((AQjmsDestination)topic).alter(dest_prop2);

12.10.4 Dropping a Destination

public void drop(javax.jms.Session session)
          throws JMSException

This method drops a destination. It has the following parameter:

Parameter Description
session JMS session

Example 12-27 Dropping a Destination

QueueSession q_sess;
Queue        queue;
TopicSession t_sess;
Topic        topic;

((AQjmsDestionation)queue).drop(q_sess);
((AQjmsDestionation)topic).drop(t_sess);

12.11 Propagation Schedules

This section contains these topics:

12.11.1 Scheduling a Propagation

public void schedulePropagation(javax.jms.Session session,
                                java.lang.String destination,
                                java.util.Date start_time,
                                java.lang.Double duration,
                                java.lang.String next_time,
                                java.lang.Double latency)
                         throws JMSException

This method schedules a propagation. It has the following parameters:

Parameter Description
session JMS session
destination Database link of the remote database for which propagation is being scheduled. A null string means that propagation is scheduled for all subscribers in the database of the topic.
start_time Time propagation starts
duration Duration of propagation
next_time Next time propagation starts
latency Latency in seconds that can be tolerated. Latency is the difference between the time a message was enqueued and the time it was propagated.

If a message has multiple recipients at the same destination in either the same or different queues, then it is propagated to all of them at the same time.

Example 12-28 Scheduling a Propagation

TopicSession t_sess;
Topic        topic;

((AQjmsDestination)topic).schedulePropagation(
   t_sess, null, null, null, null, new Double(0));

12.11.2 Enabling a Propagation Schedule

public void enablePropagationSchedule(javax.jms.Session session,
                                      java.lang.String destination)
                               throws JMSException

This method enables a propagation schedule. It has the following parameters:

Parameter Description
session JMS session
destination Database link of the destination database. A null string means that propagation is to the local database.

Example 12-29 Enabling a Propagation Schedule

TopicSession             t_sess;
Topic                    topic;

((AQjmsDestination)topic).enablePropagationSchedule(t_sess, "dbs1");

12.11.3 Altering a Propagation Schedule

public void alterPropagationSchedule(javax.jms.Session session,
                                     java.lang.String destination,
                                     java.lang.Double duration,
                                     java.lang.String next_time,
                                     java.lang.Double latency)
                              throws JMSException

This method alters a propagation schedule. It has the following parameters:

Parameter Description
session JMS session
destination Database link of the remote database for which propagation is being scheduled. A null string means that propagation is scheduled for all subscribers in the database of the topic.
duration Duration of propagation
next_time Next time propagation starts
latency Latency in seconds that can be tolerated. Latency is the difference between the time a message was enqueued and the time it was propagated.

Example 12-30 Altering a Propagation Schedule

TopicSession             t_sess;
Topic                    topic;

((AQjmsDestination)topic).alterPropagationSchedule(
   t_sess, null, 30, null, new Double(30));

12.11.4 Disabling a Propagation Schedule

public void disablePropagationSchedule(javax.jms.Session session,
                                       java.lang.String destination)
                                throws JMSException

This method disables a propagation schedule. It has the following parameters:

Parameter Description
session JMS session
destination Database link of the destination database. A null string means that propagation is to the local database.

Example 12-31 Disabling a Propagation Schedule

TopicSession             t_sess;
Topic                    topic;

((AQjmsDestination)topic).disablePropagationSchedule(t_sess, "dbs1");

12.11.5 Unscheduling a Propagation

public void unschedulePropagation(javax.jms.Session session,
                                  java.lang.String destination)
                           throws JMSException

This method unschedules a previously scheduled propagation. It has the following parameters:

Parameter Description
session JMS session
destination Database link of the destination database. A null string means that propagation is to the local database.

Example 12-32 Unscheduling a Propagation

TopicSession   t_sess;
Topic          topic;

((AQjmsDestination)topic).unschedulePropagation(t_sess, "dbs1");
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