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/* Definition of the batch_t data structure.
* I am not sure yet if this will become a full-blown object. For now, this header just
* includes the object definition and is not accompanied by code.
*
* Copyright 2009 by Rainer Gerhards and Adiscon GmbH.
*
* This file is part of the rsyslog runtime library.
*
* The rsyslog runtime library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The rsyslog runtime library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
* A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
*/
#ifndef BATCH_H_INCLUDED
#define BATCH_H_INCLUDED
/* enum for batch states. Actually, we violate a layer here, in that we assume that a batch is used
* for action processing. So far, this seems acceptable, the status is simply ignored inside the
* main message queue. But over time, it could potentially be useful to split the two.
* rgerhad, 2009-05-12
*/
typedef enum {
BATCH_STATE_RDY = 0, /* object ready for processing */
BATCH_STATE_BAD = 1, /* unrecoverable failure while processing, do NOT resubmit to same action */
BATCH_STATE_SUB = 2, /* message submitted for processing, outcome yet unkonwn */
BATCH_STATE_COMM = 3, /* message successfully commited */
BATCH_STATE_DISC = 4, /* discarded - processed OK, but do not submit to any other action */
} batch_state_t;
/* an object inside a batch, including any information (state!) needed for it to "life".
*/
struct batch_obj_s {
obj_t *pUsrp; /* pointer to user object (most often message) */
batch_state_t state; /* associated state */
};
/* the batch
* This object is used to dequeue multiple user pointers which are than handed over
* to processing. The size of elements is fixed after queue creation, but may be
* modified by config variables (better said: queue properties).
* Note that a "user pointer" in rsyslog context so far always is a message
* object. We stick to the more generic term because queues may potentially hold
* other types of objects, too.
* rgerhards, 2009-05-12
* Note that nElem is not necessarily equal to nElemDeq. This is the case when we
* discard some elements (because of configuration) during dequeue processing. As
* all Elements are only deleted when the batch is processed, we can not immediately
* delete them. So we need to keep their number that we can delete them when the batch
* is completed (else, the whole process does not work correctly).
*/
struct batch_s {
int nElem; /* actual number of element in this entry */
int nElemDeq; /* actual number of elements dequeued (and thus to be deleted) - see comment above! */
int iDoneUpTo; /* all messages below this index have state other than RDY */
qDeqID deqID; /* ID of dequeue operation that generated this batch */
batch_obj_t *pElem; /* batch elements */
};
#endif /* #ifndef BATCH_H_INCLUDED */
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