/*
* returns -1 when the incoming checkpoint is out of range of the log
* returns -2 if there was an error actually setting the checkpoint
*/
static int queue_log_add_checkpoint(fqd_queue_impl_data data, const char *name, const fq_msgid *id)
{
struct queue_jlog *d = (struct queue_jlog *)data;
jlog_id jid = {
.log = id->id.u32.p1,
.marker = id->id.u32.p2
};
/* ensure the checkpoint makes sense */
jlog_id first = {
.log = 0,
.marker = 0
};
jlog_id last = {
.log = 0,
.marker = 0
};
jlog_ctx_first_log_id(d->reader, &first);
jlog_ctx_last_log_id(d->reader, &last);
if (! (jid.log >= first.log && jid.log <= last.log &&
jid.marker >= first.marker && jid.marker <= last.marker)) {
return -1;
}
char **subs;
int sub_count = jlog_ctx_list_subscribers(d->reader, &subs);
int have_it = 0;
for (int i = 0; i < sub_count; i++) {
have_it += strcmp(subs[i], name) == 0 ? 1 : 0;
}
if (have_it == 0) {
jlog_ctx_add_subscriber(d->reader, name, JLOG_BEGIN);
}
if (jlog_ctx_read_checkpoint(d->reader, &jid) == -1) {
/*
If we failed to checkpoint we are in a situation where the 'add_subscriber' call above put
them at the beginning of the log so we have to remove the subscriber if we just added them
However, if they already existed and had a previous good checkpoint, leave it alone
*/
if (have_it == 0) {
jlog_ctx_remove_subscriber(d->reader, name);
}
return -2;
}
return 0;
}
/*
* return -1 if the subscriber doesn't exist
* return 0 on success
*/
static int queue_log_remove_checkpoint(fqd_queue_impl_data data, const char *name)
{
struct queue_jlog *d = (struct queue_jlog *)data;
if (jlog_ctx_remove_subscriber(d->reader, name) == 0) {
return -1;
}
return 0;
}
/*
* return -1 if the subscriber doesn't exist
* return -2 if we can't reset the checkpoint
* return 0 on success
*/
static int queue_log_reset_to_checkpoint(fqd_queue_impl_data data, const char *name)
{
struct queue_jlog *d = (struct queue_jlog *)data;
char **subs;
int sub_count = jlog_ctx_list_subscribers(d->reader, &subs);
int have_it = 0;
for (int i = 0; i < sub_count; i++) {
have_it += strcmp(subs[i], name) == 0 ? 1 : 0;
}
if (have_it == 0) {
return -1;
}
jlog_id checkpoint;
if (jlog_get_checkpoint(d->reader, name, &checkpoint) == -1) {
return -2;
}
if (jlog_ctx_read_checkpoint(d->reader, &checkpoint) == -1) {
return -2;
}
return 0;
}
static int write_sig(struct queue_jlog *d) {
char sigfile[PATH_MAX];
int fd;
snprintf(sigfile, sizeof(sigfile), "%s/.sig", d->qpath);
fd = open(sigfile, O_CREAT|O_TRUNC|O_WRONLY, 0640);
if(fd < 0) return -1;
write(fd, d->uuid, 16);
close(fd);
return 0;
}
static int read_sig(struct queue_jlog *d, uuid_t out) {
char sigfile[PATH_MAX];
int fd, rv;
snprintf(sigfile, sizeof(sigfile), "%s/.sig", d->qpath);
fd = open(sigfile, O_RDONLY);
if(fd < 0) return -1;
rv = read(fd, out, 16);
close(fd);
return (rv == 16) ? 0 : -1;
}
static fqd_queue_impl_data queue_jlog_setup(fq_rk *qname, uint32_t *count) {
char qpath[PATH_MAX];
jlog_id chkpt;
struct queue_jlog *d;
d = calloc(1, sizeof(*d));
d->auto_chkpt = true;
fqd_config_construct_queue_path(qpath, sizeof(qpath), qname);
d->qpath = strdup(qpath);
d->writer = jlog_new(d->qpath);
jlog_ctx_set_pre_commit_buffer_size(d->writer, 1024 * 1024);
jlog_ctx_set_multi_process(d->writer, 0);
jlog_ctx_set_use_compression(d->writer, 1);
if(jlog_ctx_open_writer(d->writer) != 0) {
jlog_ctx_close(d->writer);
d->writer = jlog_new(d->qpath);
jlog_ctx_set_pre_commit_buffer_size(d->writer, 1024 * 1024);
jlog_ctx_set_multi_process(d->writer, 0);
jlog_ctx_set_use_compression(d->writer, 1);
if(jlog_ctx_init(d->writer) != 0) {
fq_debug(FQ_DEBUG_IO, "jlog init: %s\n", jlog_ctx_err_string(d->writer));
goto bail;
}
jlog_ctx_close(d->writer);
d->writer = jlog_new(d->qpath);
jlog_ctx_set_pre_commit_buffer_size(d->writer, 1024 * 1024);
jlog_ctx_set_multi_process(d->writer, 0);
jlog_ctx_set_use_compression(d->writer, 1);
if(jlog_ctx_open_writer(d->writer) != 0) {
fq_debug(FQ_DEBUG_IO, "jlog writer: %s\n", jlog_ctx_err_string(d->writer));
goto bail;
}
}
/* 128MB journal chunks */
jlog_ctx_alter_journal_size(d->writer, 128 * 1024 * 1024);
d->reader = jlog_new(d->qpath);
if(jlog_get_checkpoint(d->reader, "fq", &chkpt) != 0) {
if(jlog_ctx_add_subscriber(d->reader, "fq", JLOG_BEGIN) != 0) {
fq_debug(FQ_DEBUG_IO, "jlog add sub: %s\n", jlog_ctx_err_string(d->reader));
goto bail;
}
}
if(jlog_ctx_open_reader(d->reader, "fq") != 0) {
fq_debug(FQ_DEBUG_IO, "jlog: %s\n", jlog_ctx_err_string(d->reader));
goto bail;
}
uuid_generate(d->uuid);
write_sig(d);
*count = d->count = jlog_ctx_read_interval(d->reader, &d->start, &d->finish);
(void)qname;
return d;
bail:
if(d->writer) jlog_ctx_close(d->writer);
if(d->reader) jlog_ctx_close(d->reader);
free(d->qpath);
free(d);
return NULL;
}
static int
process_jlog(const char *file, const char *sub)
{
jlog_ctx *log = jlog_new(file);
if (add_subscriber) {
if (jlog_ctx_add_subscriber(log, add_subscriber, JLOG_BEGIN)) {
fprintf(stderr, "Could not add subscriber '%s': %s\n", add_subscriber,
jlog_ctx_err_string(log));
} else {
OUT("Added subscriber '%s'\n", add_subscriber);
}
}
if (remove_subscriber) {
if (jlog_ctx_remove_subscriber(log, remove_subscriber) <= 0) {
fprintf(stderr, "Could not erase subscriber '%s': %s\n",
remove_subscriber, jlog_ctx_err_string(log));
} else {
OUT("Erased subscriber '%s'\n", remove_subscriber);
}
}
if (!sub) {
if (jlog_ctx_open_writer(log)) {
fprintf(stderr, "error opening '%s'\n", file);
return 0;
}
} else {
if (jlog_ctx_open_reader(log, sub)) {
fprintf(stderr, "error opening '%s'\n", file);
return 0;
}
}
if (show_progress) {
char buff[20], buff2[20], buff3[20];
jlog_id id, id2, id3;
jlog_get_checkpoint(log, sub, &id);
if (jlog_ctx_last_log_id(log, &id3)) {
fprintf(stderr, "jlog_error: %s\n", jlog_ctx_err_string(log));
fprintf(stderr, "error calling jlog_ctx_last_log_id\n");
}
jlog_snprint_logid(buff, sizeof(buff), &id);
jlog_snprint_logid(buff3, sizeof(buff3), &id3);
OUT("--------------------\n"
" Perspective of the '%s' subscriber\n"
" current checkpoint: %s\n"
" Last write: %s\n", sub, buff, buff3);
if (jlog_ctx_read_interval(log, &id, &id2) < 0) {
fprintf(stderr, "jlog_error: %s\n", jlog_ctx_err_string(log));
}
jlog_snprint_logid(buff, sizeof(buff), &id);
jlog_snprint_logid(buff2, sizeof(buff2), &id2);
OUT(" next interval: [%s, %s]\n"
"--------------------\n\n", buff, buff2);
}
if (show_subscribers) {
char **list;
int i;
jlog_ctx_list_subscribers(log, &list);
for (i = 0; list[i]; i++) {
char buff[20];
jlog_id id;
jlog_get_checkpoint(log, list[i], &id);
jlog_snprint_logid(buff, sizeof(buff), &id);
OUT("\t%32s @ %s\n", list[i], buff);
}
jlog_ctx_list_subscribers_dispose(log, list);
}
if (show_files) {
struct dirent *de;
DIR *dir;
dir = opendir(file);
if (!dir) {
fprintf(stderr, "error opening '%s'\n", file);
return 0;
}
while ((de = readdir(dir)) != NULL) {
uint32_t logid;
if (is_datafile(de->d_name, &logid)) {
char fullfile[MAXPATHLEN];
char fullidx[MAXPATHLEN];
struct stat sb;
int readers;
snprintf(fullfile, sizeof(fullfile), "%s/%s", file, de->d_name);
snprintf(fullidx, sizeof(fullidx), "%s/%s" INDEX_EXT, file, de->d_name);
if (stat(fullfile, &sb)) {
OUT("\t%8s [error stat(2)ing file: %s\n", de->d_name, strerror(errno));
} else {
readers = __jlog_pending_readers(log, logid);
OUT("\t%8s [%ju bytes] %d pending readers\n", de->d_name, sb.st_size, readers);
if (show_index_info) {
if (stat(fullidx, &sb)) {
OUT("\t\t idx: none\n");
} else {
uint32_t marker;
int closed;
if (jlog_idx_details(log, logid, &marker, &closed)) {
OUT("\t\t idx: error\n");
} else {
OUT("\t\t idx: %u messages (%08x), %s\n", marker, marker, closed ? "closed" : "open");
}
}
}
if (analyze_datafiles) {
analyze_datafile(log, logid);
}
if (readers == 0 && cleanup) {
unlink(fullfile);
unlink(fullidx);
}
}
}
}
closedir(dir);
}
jlog_ctx_close(log);
}
