-/*
- * Copyright (C) 1994-1995, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: lockidx.c,v $
- * Revision 1.1 1995-12-07 17:38:47 adam
- * Work locking mechanisms for concurrent updates/commit.
- *
- */
+/* $Id: lockidx.c,v 1.25 2005-06-14 20:28:54 adam Exp $
+ Copyright (C) 1995-2005
+ Index Data ApS
+
+This file is part of the Zebra server.
+
+Zebra is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+Zebra 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Zebra; see the file LICENSE.zebra. If not, write to the
+Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.
+*/
+
+
#include <stdio.h>
#include <assert.h>
+#ifdef WIN32
+#include <io.h>
+#endif
+#if HAVE_UNISTD_H
#include <unistd.h>
-#include <sys/file.h>
+#endif
#include <fcntl.h>
#include <string.h>
#include <errno.h>
-#include <alexutil.h>
#include "index.h"
+#include "zserver.h"
+
+static ZebraLockHandle server_lock_main = NULL;
+static ZebraLockHandle server_lock_cmt = NULL;
+static ZebraLockHandle server_lock_org = NULL;
+
+int zebraIndexWait (ZebraHandle zh, int commitPhase)
+{
+ ZebraLockHandle h;
+
+ if (server_lock_cmt)
+ zebra_unlock (server_lock_cmt);
+ else
+ {
+ char path[1024];
+
+ zebra_lock_prefix (zh->service->res, path);
+ strcat (path, FNAME_COMMIT_LOCK);
+ server_lock_cmt = zebra_lock_create (path, 1);
+ if (!server_lock_cmt)
+ {
+ yaz_log (YLOG_WARN|YLOG_ERRNO, "cannot create lock %s", path);
+ return -1;
+ }
+ }
+ if (server_lock_org)
+ zebra_unlock (server_lock_org);
+ else
+ {
+ char path[1024];
+
+ zebra_lock_prefix (zh->service->res, path);
+ strcat (path, FNAME_ORG_LOCK);
+ server_lock_org = zebra_lock_create (path, 1);
+ if (!server_lock_org)
+ {
+ yaz_log (YLOG_WARN|YLOG_ERRNO, "cannot create lock %s", path);
+ return -1;
+ }
+ }
+ if (commitPhase)
+ h = server_lock_cmt;
+ else
+ h = server_lock_org;
+ if (zebra_lock_nb (h))
+ {
+#ifndef WIN32
+ if (errno != EWOULDBLOCK)
+ {
+ yaz_log (YLOG_FATAL|YLOG_ERRNO, "flock");
+ exit (1);
+ }
+#endif
+ if (commitPhase)
+ yaz_log (YLOG_LOG, "Waiting for lock cmt");
+ else
+ yaz_log (YLOG_LOG, "Waiting for lock org");
+ if (zebra_lock (h) == -1)
+ {
+ yaz_log (YLOG_FATAL, "flock");
+ exit (1);
+ }
+ }
+ zebra_unlock (h);
+ return 0;
+}
-static int lock_fd = -1;
-void zebraIndexLockMsg (const char *str)
+void zebraIndexLockMsg (ZebraHandle zh, const char *str)
{
- int l, r;
+ char path[1024];
+ int l, r, fd;
- assert (lock_fd != -1);
- lseek (lock_fd, 0L, SEEK_SET);
+ assert (server_lock_main);
+ fd = zebra_lock_fd (server_lock_main);
+ lseek (fd, 0L, SEEK_SET);
l = strlen(str);
- r = write (lock_fd, str, l);
+ r = write (fd, str, l);
if (r != l)
{
- logf (LOG_FATAL|LOG_ERRNO, "write lock file");
+ yaz_log (YLOG_FATAL|YLOG_ERRNO, "write lock file");
exit (1);
}
+ zebra_lock_prefix (zh->service->res, path);
+ strcat (path, FNAME_TOUCH_TIME);
+ fd = creat (path, 0666);
+ close (fd);
}
-void zebraIndexUnlock (int rw)
+void zebraIndexUnlock (ZebraHandle zh)
{
char path[1024];
- char pathPrefix[1024];
-
- if (lock_fd == -1)
- return;
-
- zebraLockPrefix (pathPrefix);
- sprintf (path, "%s%s", pathPrefix, FNAME_MAIN_LOCK);
- unlink (path);
+
+ zebra_lock_prefix (zh->service->res, path);
+ strcat (path, FNAME_MAIN_LOCK);
+#ifdef WIN32
+ zebra_lock_destroy (server_lock_main);
+ if (unlink (path) && errno != ENOENT)
+ yaz_log (YLOG_WARN|YLOG_ERRNO, "unlink %s failed", path);
+#else
+ if (unlink (path) && errno != ENOENT)
+ yaz_log (YLOG_WARN|YLOG_ERRNO, "unlink %s failed", path);
+ zebra_lock_destroy (server_lock_main);
+#endif
+ server_lock_main = 0;
}
-void zebraIndexLock (int rw)
+int zebraIndexLock (BFiles bfs, ZebraHandle zh, int commitNow,
+ const char *rval)
{
char path[1024];
- char pathPrefix[1024];
char buf[256];
int r;
- zebraLockPrefix (pathPrefix);
- sprintf (path, "%s%s", pathPrefix, FNAME_MAIN_LOCK);
- if (rw)
+ if (server_lock_main)
+ return 0;
+
+ zebra_lock_prefix (zh->service->res, path);
+ strcat (path, FNAME_MAIN_LOCK);
+ while (1)
{
- while (1)
+ server_lock_main = zebra_lock_create (path, 2);
+ if (!server_lock_main)
{
- lock_fd = open (path, O_CREAT|O_RDWR|O_EXCL|O_SYNC, 0666);
- if (lock_fd == -1)
+ server_lock_main = zebra_lock_create (path, 1);
+ if (!server_lock_main)
+ {
+ yaz_log (YLOG_FATAL, "couldn't obtain indexer lock");
+ exit (1);
+ }
+ if (zebra_lock_nb (server_lock_main) == -1)
{
- lock_fd = open (path, O_RDONLY);
- assert (lock_fd != -1);
- if (flock (lock_fd, LOCK_EX|LOCK_NB) == -1)
+#ifdef WIN32
+ yaz_log (YLOG_LOG, "waiting for other index process");
+ zebra_lock (server_lock_main);
+ zebra_unlock (server_lock_main);
+ zebra_lock_destroy (server_lock_main);
+ continue;
+#else
+ if (errno == EWOULDBLOCK)
{
- if (errno == EWOULDBLOCK)
- {
- logf (LOG_LOG, "Waiting for other index process");
- flock (lock_fd, LOCK_EX);
- continue;
- }
- else
- {
- logf (LOG_FATAL|LOG_ERRNO, "flock %s", path);
- exit (1);
- }
+ yaz_log (YLOG_LOG, "waiting for other index process");
+ zebra_lock (server_lock_main);
+ zebra_unlock (server_lock_main);
+ zebra_lock_destroy (server_lock_main);
+ continue;
}
else
{
- logf (LOG_WARN, "Unlocked %s", path);
- r = read (lock_fd, buf, 256);
- if (r == 0)
- {
- logf (LOG_WARN, "Zero length %s", path);
- unlink (path);
- close (lock_fd);
- continue;
- }
- else if (r == -1)
- {
- logf (LOG_FATAL|LOG_ERRNO, "read %s", path);
- exit (1);
- }
- if (*buf == 'r')
+ yaz_log (YLOG_FATAL|YLOG_ERRNO, "flock %s", path);
+ exit (1);
+ }
+#endif
+ }
+ else
+ {
+ int fd = zebra_lock_fd (server_lock_main);
+
+ yaz_log (YLOG_WARN, "unlocked %s", path);
+ r = read (fd, buf, 256);
+ if (r == 0)
+ {
+ yaz_log (YLOG_WARN, "zero length %s", path);
+ zebra_lock_destroy (server_lock_main);
+ unlink (path);
+ continue;
+ }
+ else if (r == -1)
+ {
+ yaz_log (YLOG_FATAL|YLOG_ERRNO, "read %s", path);
+ exit (1);
+ }
+ if (*buf == 'r')
+ {
+ yaz_log (YLOG_WARN, "previous transaction didn't"
+ " reach commit");
+ zebra_lock_destroy (server_lock_main);
+ bf_commitClean (bfs, rval);
+ unlink (path);
+ continue;
+ }
+ else if (*buf == 'd')
+ {
+ yaz_log (YLOG_WARN, "commit file wan't deleted after commit");
+ zebra_lock_destroy (server_lock_main);
+ bf_commitClean (bfs, rval);
+ unlink (path);
+ continue;
+ }
+ else if (*buf == 'w')
+ {
+ yaz_log (YLOG_WARN,
+ "The lock file indicates that your index is");
+ yaz_log (YLOG_WARN, "inconsistent. Perhaps the indexer");
+ yaz_log (YLOG_WARN, "terminated abnormally in the previous");
+ yaz_log (YLOG_WARN, "run. You can try to proceed by");
+ yaz_log (YLOG_WARN, "deleting the file %s", path);
+ exit (1);
+ }
+ else if (*buf == 'c')
+ {
+ if (commitNow)
{
- logf (LOG_WARN, "Previous transaction didn't"
- " reach commit");
unlink (path);
- close (lock_fd);
+ zebra_lock_destroy (server_lock_main);
continue;
}
- else if (*buf == 'w')
- {
- logf (LOG_WARN, "Your index may be inconsistent");
- exit (1);
- }
- else if (*buf == 'c')
- {
- logf (LOG_FATAL, "Previous transaction didn't"
- " finish commit. Restore now!");
- exit (1);
- }
- else
- {
- logf (LOG_FATAL, "Unknown id 0x%02x in %s", *buf,
- path);
- exit (1);
- }
+ yaz_log (YLOG_FATAL, "previous transaction didn't"
+ " finish commit. Commit now!");
+ exit (1);
+ }
+ else
+ {
+ yaz_log (YLOG_FATAL, "unknown id 0x%02x in %s", *buf,
+ path);
+ exit (1);
}
}
- else
- break;
}
- flock (lock_fd, LOCK_EX);
+ else
+ break;
}
-}
-
-void zebraIndexLockCommit (void)
-{
-
+ zebra_lock (server_lock_main);
+ return 0;
}
projects / idzebra-moved-to-github.git / blobdiff