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authorAdam Kocoloski <adam@cloudant.com>2010-08-11 15:22:33 -0400
committerAdam Kocoloski <adam@cloudant.com>2010-08-11 17:39:37 -0400
commit81bdbed444df2cbcf3cdb32f7d4a74019de06454 (patch)
treeeade7d0d9bb4cac01b55fd8642adfe0f7da35161 /src/couchdb/couch_uuids.erl
parentcc1910f73fbd20c5ffc94bd61e7701d7f5e4c92a (diff)
reorganize couch .erl and driver code into rebar layout
Diffstat (limited to 'src/couchdb/couch_uuids.erl')
-rw-r--r--src/couchdb/couch_uuids.erl95
1 files changed, 0 insertions, 95 deletions
diff --git a/src/couchdb/couch_uuids.erl b/src/couchdb/couch_uuids.erl
deleted file mode 100644
index e1851e1d..00000000
--- a/src/couchdb/couch_uuids.erl
+++ /dev/null
@@ -1,95 +0,0 @@
-% Licensed under the Apache License, Version 2.0 (the "License"); you may not
-% use this file except in compliance with the License. You may obtain a copy of
-% the License at
-%
-% http://www.apache.org/licenses/LICENSE-2.0
-%
-% Unless required by applicable law or agreed to in writing, software
-% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-% License for the specific language governing permissions and limitations under
-% the License.
--module(couch_uuids).
--include("couch_db.hrl").
-
--behaviour(gen_server).
-
--export([start/0, stop/0]).
--export([new/0, random/0, utc_random/0]).
-
--export([init/1, terminate/2, code_change/3]).
--export([handle_call/3, handle_cast/2, handle_info/2]).
-
-start() ->
- gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
-
-stop() ->
- gen_server:cast(?MODULE, stop).
-
-new() ->
- gen_server:call(?MODULE, create).
-
-random() ->
- list_to_binary(couch_util:to_hex(crypto:rand_bytes(16))).
-
-utc_random() ->
- Now = {_, _, Micro} = now(),
- Nowish = calendar:now_to_universal_time(Now),
- Nowsecs = calendar:datetime_to_gregorian_seconds(Nowish),
- Then = calendar:datetime_to_gregorian_seconds({{1970, 1, 1}, {0, 0, 0}}),
- Prefix = io_lib:format("~14.16.0b", [(Nowsecs - Then) * 1000000 + Micro]),
- list_to_binary(Prefix ++ couch_util:to_hex(crypto:rand_bytes(9))).
-
-init([]) ->
- ok = couch_config:register(
- fun("uuids", _) -> gen_server:cast(?MODULE, change) end
- ),
- {ok, state()}.
-
-terminate(_Reason, _State) ->
- ok.
-
-handle_call(create, _From, random) ->
- {reply, random(), random};
-handle_call(create, _From, utc_random) ->
- {reply, utc_random(), utc_random};
-handle_call(create, _From, {sequential, Pref, Seq}) ->
- Result = ?l2b(Pref ++ io_lib:format("~6.16.0b", [Seq])),
- case Seq >= 16#fff000 of
- true ->
- {reply, Result, {sequential, new_prefix(), inc()}};
- _ ->
- {reply, Result, {sequential, Pref, Seq + inc()}}
- end.
-
-handle_cast(change, _State) ->
- {noreply, state()};
-handle_cast(stop, State) ->
- {stop, normal, State};
-handle_cast(_Msg, State) ->
- {noreply, State}.
-
-handle_info(_Info, State) ->
- {noreply, State}.
-
-code_change(_OldVsn, State, _Extra) ->
- {ok, State}.
-
-new_prefix() ->
- couch_util:to_hex((crypto:rand_bytes(13))).
-
-inc() ->
- crypto:rand_uniform(1, 16#ffe).
-
-state() ->
- AlgoStr = couch_config:get("uuids", "algorithm", "random"),
- case couch_util:to_existing_atom(AlgoStr) of
- random ->
- random;
- utc_random ->
- utc_random;
- sequential ->
- {sequential, new_prefix(), inc()};
- Unknown ->
- throw({unknown_uuid_algorithm, Unknown})
- end.