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author | Micah Anderson <micah@leap.se> | 2014-01-15 18:13:16 +0000 |
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committer | drebs <drebs@leap.se> | 2014-01-17 08:48:11 -0200 |
commit | 510c6d763fba74f95ae8f894408c3658bcef4f83 (patch) | |
tree | d4dd0930b902cb1e5d46bea621ec83f801ea8ed6 /deps/fabric/src/fabric_db_info.erl | |
parent | 8bd863936ead4243f58fb99e11d1221e1af0a71e (diff) |
embed dependencies that were previously pulled in by git during rebar build
Diffstat (limited to 'deps/fabric/src/fabric_db_info.erl')
-rw-r--r-- | deps/fabric/src/fabric_db_info.erl | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/deps/fabric/src/fabric_db_info.erl b/deps/fabric/src/fabric_db_info.erl new file mode 100644 index 00000000..63fb44a5 --- /dev/null +++ b/deps/fabric/src/fabric_db_info.erl @@ -0,0 +1,104 @@ +% Copyright 2010 Cloudant +% +% 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(fabric_db_info). + +-export([go/1]). + +-include("fabric.hrl"). +-include_lib("mem3/include/mem3.hrl"). + +go(DbName) -> + Shards = mem3:shards(DbName), + Workers = fabric_util:submit_jobs(Shards, get_db_info, []), + RexiMon = fabric_util:create_monitors(Shards), + Acc0 = {fabric_dict:init(Workers, nil), []}, + try + fabric_util:recv(Workers, #shard.ref, fun handle_message/3, Acc0) + after + rexi_monitor:stop(RexiMon) + end. + +handle_message({rexi_DOWN, _, {_,NodeRef},_}, _Shard, {Counters, Acc}) -> + case fabric_util:remove_down_workers(Counters, NodeRef) of + {ok, NewCounters} -> + {ok, {NewCounters, Acc}}; + error -> + {error, {nodedown, <<"progress not possible">>}} + end; + +handle_message({rexi_EXIT, Reason}, Shard, {Counters, Acc}) -> + NewCounters = lists:keydelete(Shard,1,Counters), + case fabric_view:is_progress_possible(Counters) of + true -> + {ok, {NewCounters, Acc}}; + false -> + {error, Reason} + end; + +handle_message({ok, Info}, #shard{dbname=Name} = Shard, {Counters, Acc}) -> + case fabric_dict:lookup_element(Shard, Counters) of + undefined -> + % already heard from someone else in this range + {ok, {Counters, Acc}}; + nil -> + Seq = couch_util:get_value(update_seq, Info), + C1 = fabric_dict:store(Shard, Seq, Counters), + C2 = fabric_view:remove_overlapping_shards(Shard, C1), + case fabric_dict:any(nil, C2) of + true -> + {ok, {C2, [Info|Acc]}}; + false -> + {stop, [ + {db_name,Name}, + {update_seq, fabric_view_changes:pack_seqs(C2)} | + merge_results(lists:flatten([Info|Acc])) + ]} + end + end; +handle_message(_, _, Acc) -> + {ok, Acc}. + +merge_results(Info) -> + Dict = lists:foldl(fun({K,V},D0) -> orddict:append(K,V,D0) end, + orddict:new(), Info), + orddict:fold(fun + (doc_count, X, Acc) -> + [{doc_count, lists:sum(X)} | Acc]; + (doc_del_count, X, Acc) -> + [{doc_del_count, lists:sum(X)} | Acc]; + (purge_seq, X, Acc) -> + [{purge_seq, lists:sum(X)} | Acc]; + (compact_running, X, Acc) -> + [{compact_running, lists:member(true, X)} | Acc]; + (disk_size, X, Acc) -> + [{disk_size, lists:sum(X)} | Acc]; + (other, X, Acc) -> + [{other, {merge_other_results(X)}} | Acc]; + (disk_format_version, X, Acc) -> + [{disk_format_version, lists:max(X)} | Acc]; + (_, _, Acc) -> + Acc + end, [{instance_start_time, <<"0">>}], Dict). + +merge_other_results(Results) -> + Dict = lists:foldl(fun({Props}, D) -> + lists:foldl(fun({K,V},D0) -> orddict:append(K,V,D0) end, D, Props) + end, orddict:new(), Results), + orddict:fold(fun + (data_size, X, Acc) -> + [{data_size, lists:sum(X)} | Acc]; + (_, _, Acc) -> + Acc + end, [], Dict). |