Remove unused object info table code. (#1388)

src/common/state/object_table.cc

@@ -90,23 +90,6 @@ void object_table_request_notifications(DBHandle *db_handle,
                       redis_object_table_request_notifications, NULL);
 }
 
-void object_info_subscribe(DBHandle *db_handle,
-                           object_info_subscribe_callback subscribe_callback,
-                           void *subscribe_context,
-                           RetryInfo *retry,
-                           object_info_done_callback done_callback,
-                           void *user_context) {
-  ObjectInfoSubscribeData *sub_data =
-      (ObjectInfoSubscribeData *) malloc(sizeof(ObjectInfoSubscribeData));
-  sub_data->subscribe_callback = subscribe_callback;
-  sub_data->subscribe_context = subscribe_context;
-
-  init_table_callback(db_handle, ObjectID::nil(), __func__,
-                      new CommonCallbackData(sub_data), retry,
-                      (table_done_callback) done_callback,
-                      redis_object_info_subscribe, user_context);
-}
-
 void result_table_add(DBHandle *db_handle,
                       ObjectID object_id,
                       TaskID task_id,

src/common/state/object_table.h

@@ -174,45 +174,6 @@ typedef struct {
   void *subscribe_context;
 } ObjectTableSubscribeData;
 
-/*
- * ==== Object info table, contains size of the object ====
- */
-
-typedef void (*object_info_done_callback)(ObjectID object_id,
-                                          void *user_context);
-
-typedef void (*object_info_subscribe_callback)(ObjectID object_id,
-                                               int64_t object_size,
-                                               void *user_context);
-
-/**
- * Subcribing to the object info pub/sub channel
- *
- * @param db_handle Handle to db.
- * @param object_info_subscribe_callback callback triggered when pub/sub channel
- *        is notified of a new object size.
- * @param subscribe_context caller context which will be passed back in the
- *        object_info_subscribe_callback.
- * @param retry Information about retrying the request to the database.
- * @param done_callback Callback to be called when subscription is installed.
- * @param user_context User context to be passed into the done and fail
- *        callbacks.
- * @return Void.
- */
-void object_info_subscribe(DBHandle *db_handle,
-                           object_info_subscribe_callback subscribe_callback,
-                           void *subscribe_context,
-                           RetryInfo *retry,
-                           object_info_done_callback done_callback,
-                           void *user_context);
-
-/* Data that is needed to register new object info callbacks with the state
- * database. */
-typedef struct {
-  object_info_subscribe_callback subscribe_callback;
-  void *subscribe_context;
-} ObjectInfoSubscribeData;
-
 /*
  *  ==== Result table ====
  */

src/common/state/redis.cc

@@ -1606,56 +1606,6 @@ void redis_actor_table_mark_removed(DBHandle *db, ActorID actor_id) {
   }
 }
 
-void redis_object_info_subscribe_callback(redisAsyncContext *c,
-                                          void *r,
-                                          void *privdata) {
-  REDIS_CALLBACK_HEADER(db, callback_data, r);
-  redisReply *reply = (redisReply *) r;
-
-  CHECK(reply->type == REDIS_REPLY_ARRAY);
-
-  CHECK(reply->elements > 2);
-  /* First entry is message type, then possibly the regex we psubscribed to,
-   * then topic, then payload. */
-  redisReply *payload = reply->element[reply->elements - 1];
-  /* If this condition is true, we got the initial message that acknowledged the
-   * subscription. */
-  if (payload->str == NULL) {
-    if (callback_data->done_callback) {
-      db_client_table_done_callback done_callback =
-          (db_client_table_done_callback) callback_data->done_callback;
-      done_callback(callback_data->id, callback_data->user_context);
-    }
-    /* Note that we do not destroy the callback data yet because the
-     * subscription callback needs this data. */
-    remove_timer_callback(db->loop, callback_data);
-    return;
-  }
-  /* Otherwise, parse the payload and call the callback. */
-  ObjectInfoSubscribeData *data =
-      (ObjectInfoSubscribeData *) callback_data->data->Get();
-  ObjectID object_id;
-  memcpy(object_id.mutable_data(), payload->str, sizeof(object_id));
-  /* payload->str should have the format: "ObjectID:object_size_int" */
-  LOG_DEBUG("obj:info channel received message <%s>", payload->str);
-  if (data->subscribe_callback) {
-    data->subscribe_callback(
-        object_id, strtol(&payload->str[1 + sizeof(object_id)], NULL, 10),
-        data->subscribe_context);
-  }
-}
-
-void redis_object_info_subscribe(TableCallbackData *callback_data) {
-  DBHandle *db = callback_data->db_handle;
-  int status = redisAsyncCommand(
-      db->subscribe_context, redis_object_info_subscribe_callback,
-      (void *) callback_data->timer_id, "PSUBSCRIBE obj:info");
-  if ((status == REDIS_ERR) || db->subscribe_context->err) {
-    LOG_REDIS_DEBUG(db->subscribe_context,
-                    "error in object_info_register_callback");
-  }
-}
-
 void redis_push_error_rpush_callback(redisAsyncContext *c,
                                      void *r,
                                      void *privdata) {