riak / src / riak_delete.erl

justin 1c37b76 


























Andy Gross 9cb2e95 
Andy Gross 8d96d21 

justin 1c37b76 














Andy Gross 8d96d21 
justin 1c37b76 



Andy Gross 8d96d21 
justin 1c37b76 

Andy Gross 8d96d21 
justin 1c37b76 



Andy Gross 8d96d21 

justin 1c37b76 








%% This file is provided to you 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.    

%% @doc Interface used by riak_api for object deletion.

-module(riak_delete).

-export([delete/5]).

%% @spec delete(riak_object:bucket(), riak_object:key(), RW :: integer(),
%%              TimeoutMillisecs :: integer(), Client :: pid()) -> term()
%% @doc Delete the object at Bucket/Key.  Direct return value is uninteresting,
%%      see riak_client:delete/3 for expected gen_server replies to Client.
delete(Bucket,Key,RW,Timeout,Client) ->           
    RealStartTime = riak_util:moment(),
    ReqID = erlang:phash2({random:uniform(),self(),Bucket,Key,RealStartTime}),
    riak_eventer:notify(riak_delete, delete_start, {ReqID, Bucket, Key}),
    case gen_server2:call({riak_api, node()},
                          {get,Bucket,Key,RW,Timeout}) of
        {ok, OrigObj} ->
            RemainingTime = Timeout - (riak_util:moment() - RealStartTime),
            OrigMD = hd([MD || {MD,_V} <- riak_object:get_contents(OrigObj)]),
            NewObj = riak_object:update_metadata(OrigObj,
                            dict:store(<<"X-Riak-Deleted">>, "true", OrigMD)),
            {ok, C} = riak:local_client(),
            Reply = C:put(NewObj, RW, RW, RemainingTime),
            case Reply of
                ok -> 
                    spawn(fun()-> riak_bucketkeys:del_key(Bucket,Key) end),
                    spawn(
                      fun()-> reap(Bucket,Key,RemainingTime,Timeout,ReqID) end);
                _ -> nop
            end,
            riak_eventer:notify(riak_delete, delete_reply, {ReqID, Reply}),
            gen_server2:reply(Client, Reply);
        {error, notfound} ->
            spawn(fun()-> riak_bucketkeys:del_key(Bucket,Key) end),
            riak_eventer:notify(riak_delete, delete_reply,
                                {ReqID, {error, notfound}}),
            gen_server2:reply(Client, {error, notfound});
        X ->
            riak_eventer:notify(riak_delete, delete_reply, {ReqID, X}),
            gen_server2:reply(Client, X)
    end.

reap(Bucket, Key, WaitTime, Timeout, ReqId) ->
    timer:sleep(WaitTime),
    case gen_server2:call({riak_api, node()}, 
                          {get, Bucket, Key, 1, Timeout}) of
        {error, notfound} ->
            riak_eventer:notify(riak_delete, finalize_reap, 
                                {ReqId, Bucket, Key, ok});
        {ok, _Obj} ->
            riak_eventer:notify(riak_delete, finalize_reap, 
                                {ReqId, Bucket, Key, not_deleted});
        O ->
            riak_eventer:notify(riak_delete, finalize_reap,
                                {ReqId, Bucket, Key, O})
    end.
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