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#ifndef TARANTOOL_RECOVERY_H_INCLUDED
#define TARANTOOL_RECOVERY_H_INCLUDED
/*
* Copyright 2010-2016, Tarantool AUTHORS, please see AUTHORS file.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* <COPYRIGHT HOLDER> OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "small/rlist.h"
#include "trivia/util.h"
#include "third_party/tarantool_ev.h"
#include "xlog.h"
#include "vclock.h"
#if defined(__cplusplus)
extern "C" {
#endif /* defined(__cplusplus) */
extern const struct type_info type_XlogGapError;
struct xrow_header;
struct xstream;
struct recovery {
struct vclock vclock;
/** The WAL cursor we're currently reading/writing from/to. */
struct xlog_cursor cursor;
struct xdir wal_dir;
/**
* This fiber is used in local hot standby mode.
* It looks for changes in the wal_dir and applies
* them locally.
*/
struct fiber *watcher;
/** List of triggers invoked when the current WAL is closed. */
struct rlist on_close_log;
};
struct recovery *
recovery_new(const char *wal_dirname, bool force_recovery,
const struct vclock *vclock);
void
recovery_delete(struct recovery *r);
/**
* Scan the WAL directory, build an index of all found
* WAL files, then scan the most recent WAL file to find
* the vclock of the last record (returned in @end_vclock).
* @gc_vclock is set to the oldest vclock available in the
* WAL directory.
*/
void
recovery_scan(struct recovery *r, struct vclock *end_vclock,
struct vclock *gc_vclock);
void
recovery_follow_local(struct recovery *r, struct xstream *stream,
const char *name, ev_tstamp wal_dir_rescan_delay);
void
recovery_stop_local(struct recovery *r);
void
recovery_finalize(struct recovery *r);
#if defined(__cplusplus)
} /* extern "C" */
#endif /* defined(__cplusplus) */
/**
* Find out if there are new .xlog files since the current
* vclock, and read them all up.
*
* Reading will be stopped on reaching stop_vclock.
* Use NULL for boundless recover
*
* This function will not close r->current_wal if
* recovery was successful.
*/
void
recover_remaining_wals(struct recovery *r, struct xstream *stream,
const struct vclock *stop_vclock, bool scan_dir);
#endif /* TARANTOOL_RECOVERY_H_INCLUDED */
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