{
BlueSkyCloudLog *log = g_new0(BlueSkyCloudLog, 1);
+ log->lock = g_mutex_new();
+ log->cond = g_cond_new();
log->fs = fs;
log->type = LOGTYPE_UNKNOWN;
log->id = bluesky_cloudlog_new_id();
void bluesky_cloudlog_ref(BlueSkyCloudLog *log)
{
+ if (log == NULL)
+ return;
+
g_atomic_int_inc(&log->refcount);
}
void bluesky_cloudlog_unref(BlueSkyCloudLog *log)
{
+ if (log == NULL)
+ return;
+
if (g_atomic_int_dec_and_test(&log->refcount)) {
g_print("Cloud log refcount dropped to zero.\n");
}
}
/* Start a write of the object to the local log. */
-BlueSkyLogItem *bluesky_cloudlog_sync(BlueSkyCloudLog *log)
+void bluesky_cloudlog_sync(BlueSkyCloudLog *log)
{
- BlueSkyLogItem *log_item = bluesky_log_item_new();
- log_item->key = bluesky_cloudlog_id_to_string(log->id);
- log_item->data = log->data;
- bluesky_string_ref(log->data);
- bluesky_log_item_submit(log_item, log->fs->log);
- return log_item;
+ bluesky_log_item_submit(log, log->fs->log);
}
/* Add the given entry to the global hash table containing cloud log entries.
void bluesky_cloudlog_write_log(BlueSkyFS *fs)
{
- g_print("Starting cloudlog write...\n");
-
BlueSkyCloudLogState *state = fs->log_state;
- state->data = g_string_new("");
+ if (state->data == NULL)
+ state->data = g_string_new("");
g_mutex_lock(fs->lock);
g_hash_table_foreach(fs->locations, find_inodes, state);
state->inode_list);
}
- g_print("Serialized %zd bytes of data\n", state->data->len);
-
- BlueSkyStoreAsync *async = bluesky_store_async_new(fs->store);
- async->op = STORE_OP_PUT;
- async->key = g_strdup_printf("log-%08d-%08d",
- state->location.directory,
- state->location.sequence);
- async->data = bluesky_string_new_from_gstring(state->data);
- bluesky_store_async_submit(async);
- bluesky_store_async_wait(async);
- bluesky_store_async_unref(async);
+ if (state->data->len > 0) {
+ g_print("Serialized %zd bytes of data to cloud\n", state->data->len);
+
+ BlueSkyStoreAsync *async = bluesky_store_async_new(fs->store);
+ async->op = STORE_OP_PUT;
+ async->key = g_strdup_printf("log-%08d-%08d",
+ state->location.directory,
+ state->location.sequence);
+ async->data = bluesky_string_new_from_gstring(state->data);
+ bluesky_store_async_submit(async);
+ bluesky_store_async_wait(async);
+ bluesky_store_async_unref(async);
+
+ state->location.sequence++;
+ state->location.offset = 0;
+ }
state->data = NULL;
- state->location.sequence++;
- state->location.offset = 0;
+}
+
+/* Ensure that a cloud log item is loaded in memory, and if not read it in.
+ * TODO: Make asynchronous, and make this also fetch from the cloud. Right now
+ * we only read from the log. Log item must be locked. */
+void bluesky_cloudlog_fetch(BlueSkyCloudLog *log)
+{
+ if (log->data != NULL)
+ return;
+
+ g_print("Re-mapping log entry %d/%d/%d...\n",
+ log->log_seq, log->log_offset, log->log_size);
+
+ g_assert(log->location_flags & CLOUDLOG_JOURNAL);
+
+ log->data = bluesky_log_map_object(log->fs->log, log->log_seq,
+ log->log_offset, log->log_size);
+
+ g_cond_broadcast(log->cond);
}