OCI_Msg * OCI_API OCI_MsgCreate
(
OCI_TypeInfo *typinf
)
{
OCI_Msg *msg = NULL;
boolean res = TRUE;
OCI_CHECK_INITIALIZED(NULL);
OCI_CHECK_PTR(OCI_IPC_TYPE_INFO, typinf, NULL);
/* allocate message structure */
msg = (OCI_Msg *) OCI_MemAlloc(OCI_IPC_MSG, sizeof(*msg), (size_t) 1, TRUE);
if (msg != NULL)
{
msg->typinf = typinf;
msg->ind = OCI_IND_NULL;
/* allocate message properties descriptor */
res = (OCI_SUCCESS == OCI_DescriptorAlloc((dvoid * ) msg->typinf->con->env,
(dvoid **) &msg->proph,
OCI_DTYPE_AQMSG_PROPERTIES,
(size_t) 0, (dvoid **) NULL));
if (res == TRUE)
{
/* allocate internal OCI_Object handle if payload is not RAW */
if (msg->typinf->tcode != OCI_UNKNOWN)
{
msg->obj = OCI_ObjectCreate(typinf->con, typinf);
res = (msg->obj != NULL);
}
}
}
else
{
res = FALSE;
}
/* check for failure */
if (res == FALSE)
{
OCI_MsgFree(msg);
msg = NULL;
}
return msg;
}
OCI_Msg * OCI_API OCI_MsgCreate
(
OCI_TypeInfo *typinf
)
{
OCI_Msg *msg = NULL;
OCI_CALL_ENTER(OCI_Msg*, NULL)
OCI_CALL_CHECK_PTR(OCI_IPC_TYPE_INFO, typinf)
OCI_CALL_CONTEXT_SET_FROM_CONN(typinf->con)
/* allocate message structure */
msg = (OCI_Msg *) OCI_MemAlloc(OCI_IPC_MSG, sizeof(*msg), (size_t) 1, TRUE);
OCI_STATUS = (NULL != msg);
if (OCI_STATUS)
{
msg->typinf = typinf;
msg->ind = OCI_IND_NULL;
/* allocate message properties descriptor */
OCI_STATUS = OCI_DescriptorAlloc((dvoid *)msg->typinf->con->env, (dvoid **)&msg->proph, OCI_DTYPE_AQMSG_PROPERTIES);
if (OCI_STATUS)
{
/* allocate internal OCI_Object handle if payload is not RAW */
if (OCI_UNKNOWN != msg->typinf->typecode)
{
msg->obj = OCI_ObjectCreate(typinf->con, typinf);
OCI_STATUS = (NULL != msg->obj);
}
}
}
/* check for failure */
if (OCI_STATUS)
{
OCI_RETVAL = msg;
}
else if (msg)
{
OCI_MsgFree(msg);
msg = NULL;
}
OCI_CALL_EXIT()
}
int main(int argc, char *argv[])
{
OCI_Connection *con;
OCI_Enqueue *enq;
OCI_Dequeue *deq;
OCI_Msg *msg;
OCI_TypeInfo *inf;
OCI_Object *obj;
OCI_Initialize(NULL, NULL, OCI_ENV_DEFAULT);
con = OCI_ConnectionCreate("db", "usr", "pwd", OCI_SESSION_DEFAULT);
inf = OCI_TypeInfoGet(con, "MY_MESSAGE", OCI_TIF_TYPE);
enq = OCI_EnqueueCreate(inf, "my_queue");
deq = OCI_DequeueCreate(inf, "my_queue");
msg = OCI_MsgCreate(inf);
obj = OCI_ObjectCreate(con, inf);
OCI_ObjectSetString(obj, "TITLE", "NEXT MEETING");
OCI_ObjectSetString(obj, "CONTENT", "12:00 PM IN STARBUCKS");
OCI_MsgSetObject(msg, obj);
OCI_EnqueuePut(enq, msg);
OCI_MsgFree(msg);
OCI_ObjectFree(obj);
OCI_Commit(con);
msg = OCI_DequeueGet(deq);
obj = OCI_MsgGetObject(msg);
printf("MSG '%s' => %s\n", OCI_ObjectGetString(obj, "TITLE"),
OCI_ObjectGetString(obj, "CONTENT"));
OCI_EnqueueFree(enq);
OCI_DequeueFree(deq);
OCI_ConnectionFree(con);
OCI_Cleanup();
return EXIT_SUCCESS;
}
boolean OCI_API OCI_DequeueFree
(
OCI_Dequeue *dequeue
)
{
OCI_CHECK_PTR(OCI_IPC_DEQUEUE, dequeue, FALSE);
/* Unsubscribe notification if needed */
if (dequeue->subhp != NULL)
{
OCI_DequeueUnsubscribe(dequeue);
}
/* free local message */
if (dequeue->msg != NULL)
{
OCI_MsgFree(dequeue->msg);
}
/* free local agent */
if (dequeue->agent != NULL)
{
OCI_AgentFree(dequeue->agent);
}
/* free OCI descriptor */
OCI_DescriptorFree((dvoid *) dequeue->opth, OCI_DTYPE_AQDEQ_OPTIONS);
/* free strings */
OCI_FREE(dequeue->name);
OCI_FREE(dequeue->pattern);
OCI_FREE(dequeue->consumer);
/* free misc. */
OCI_FREE(dequeue->agent_list);
OCI_FREE(dequeue);
return TRUE;
}
int main(int argc, char *argv[])
{
OCI_Connection *con;
OCI_Enqueue *enq;
OCI_Dequeue *deq1;
OCI_Dequeue *deq2;
OCI_Msg *msg;
OCI_TypeInfo *inf;
OCI_Object *obj;
OCI_Agent *agents[2];
OCI_Initialize(err_handler, NULL, OCI_ENV_DEFAULT | OCI_ENV_THREADED |OCI_ENV_EVENTS);
con = OCI_ConnectionCreate("db", "usr", "pwd", OCI_SESSION_DEFAULT);
OCI_Immediate(con, "create type my_message as object (title varchar2(50), content varchar2(50)) ");
OCI_QueueTableCreate(con, "my_queue_table", "my_message", NULL, NULL, TRUE, FALSE, NULL, 0,0,NULL);
OCI_QueueCreate(con, "my_queue", "my_queue_table", OCIT_NORMAL, 0, 0, 0, 0, NULL);
OCI_QueueStart(con, "my_queue", TRUE, TRUE);
agents[0] = OCI_AgentCreate(con, "C1", NULL);
agents[1] = OCI_AgentCreate(con, "C2", NULL);
inf = OCI_TypeInfoGet(con, "MY_MESSAGE", OCI_TIF_TYPE);
enq = OCI_EnqueueCreate(inf, "my_queue");
deq1 = OCI_DequeueCreate(inf, "my_queue");
deq2 = OCI_DequeueCreate(inf, "my_queue");
OCI_DequeueSetConsumer(deq1, "C1");
OCI_DequeueSetNavigation(deq1, OCI_ADN_FIRST_MSG);
OCI_DequeueSetConsumer(deq2, "C2");
OCI_DequeueSetNavigation(deq2, OCI_ADN_FIRST_MSG);
OCI_DequeueSubscribe(deq1, 9998, 0, on_message);
OCI_DequeueSubscribe(deq2, 9999, 0, on_message);
msg = OCI_MsgCreate(inf);
obj = OCI_ObjectCreate(con, inf);
OCI_ObjectSetString(obj, "TITLE", "NEXT MEETING");
OCI_ObjectSetString(obj, "CONTENT", "12:00 PM IN STARBUCKS");
OCI_MsgSetObject(msg, obj);
OCI_MsgSetConsumers(msg, agents, 2);
OCI_EnqueuePut(enq, msg);
OCI_MsgFree(msg);
OCI_ObjectFree(obj);
OCI_Commit(con);
getchar();
OCI_DequeueUnsubscribe(deq1);
OCI_DequeueUnsubscribe(deq2);
OCI_AgentFree(agents[0]);
OCI_AgentFree(agents[1]);
OCI_EnqueueFree(enq);
OCI_DequeueFree(deq1);
OCI_DequeueFree(deq2);
OCI_QueueStop(con, "my_queue", TRUE, TRUE, 0);
OCI_QueueDrop(con, "my_queue");
OCI_QueueTableDrop(con, "my_queue_table", TRUE);
OCI_Immediate(con, "drop type my_message");
OCI_ConnectionFree(con);
OCI_Cleanup();
return EXIT_SUCCESS;
}
