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moonpolysoft/output.txt

Created August 7, 2008 05:31
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block_server.erl
%%%-------------------------------------------------------------------
%%% File: file_server.erl
%%% @author Cliff Moon <> []
%%% @copyright 2008 Cliff Moon
%%% @doc
%%%
%%% @end
%%%
%%% @since 2008-08-05 by Cliff Moon
%%%-------------------------------------------------------------------
-module(block_server).
-author('cliff moon').
-behaviour(gen_server).
%% API
-export([start_link/2, stop/1, read_block/3, write_block/3, read_key/2, write_key/3]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-record(state, {index,keys}).
%%====================================================================
%% API
%%====================================================================
%%--------------------------------------------------------------------
%% @spec start_link() -> {ok,Pid} | ignore | {error,Error}
%% @doc Starts the server
%% @end
%%--------------------------------------------------------------------
start_link(FileName, BlockSize) ->
gen_server:start_link(block_server, [FileName, BlockSize], []).
stop(Pid) ->
gen_server:call(Pid, close).
read_block(Pid, Offset, Size) ->
gen_server:call(Pid, {read_block, Offset, Size}).
write_block(Pid, Offset, Data) ->
gen_server:call(Pid, {write_block, Offset, Data}).
read_key(Pid, Offset) ->
gen_server:call(Pid, {read_key, Offset}).
write_key(Pid, Offset, Key) ->
gen_server:call(Pid, {write_key, Offset, Key}).
%%====================================================================
%% gen_server callbacks
%%====================================================================
%%--------------------------------------------------------------------
%% @spec init(Args) -> {ok, State} |
%% {ok, State, Timeout} |
%% ignore |
%% {stop, Reason}
%% @doc Initiates the server
%% @end
%%--------------------------------------------------------------------
init([FileName, BlockSize]) ->
process_flag(trap_exit, true),
{ok, Index} = file:open(
lists:concat([FileName, ".idx"]),
[read, write, raw, binary]),
{ok, Keys} = file:open(
lists:concat([FileName, ".keys"]),
[read, write, raw]),
{ok, #state{index=Index,keys=Keys}}.
%%--------------------------------------------------------------------
%% @spec
%% handle_call(Request, From, State) -> {reply, Reply, State} |
%% {reply, Reply, State, Timeout} |
%% {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, Reply, State} |
%% {stop, Reason, State}
%% @doc Handling call messages
%% @end
%%--------------------------------------------------------------------
handle_call({read_block, Offset, Size}, _From, State = #state{index=Index}) ->
{reply, file:pread(Index, Offset, Size), State};
handle_call({write_block, Offset, Data}, _From, State = #state{index=Index}) ->
{ok, Position} = file:position(Index, Offset),
if
4 >= Position -> error_logger:info_msg("writing ~p bytes at ~p~n", [Data, Position]);
true -> ok
end,
{reply, {file:write(Index, Data), Position}, State};
handle_call({read_key, Offset}, _From, State = #state{keys=Keys}) ->
file:position(Keys, Offset),
{reply, int_read_key(Keys, []), State};
handle_call({write_key, Offset, Key}, _From, State = #state{keys=Keys}) ->
{ok, Position} = file:position(Keys, Offset),
{reply, {file:write(Keys, Key ++ [0]), Position}, State};
handle_call(close, _From, State) ->
{stop, shutdown, ok, State}.
%%--------------------------------------------------------------------
%% @spec handle_cast(Msg, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% @doc Handling cast messages
%% @end
%%--------------------------------------------------------------------
handle_cast(_Msg, State) ->
{noreply, State}.
%%--------------------------------------------------------------------
%% @spec handle_info(Info, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% @doc Handling all non call/cast messages
%% @end
%%--------------------------------------------------------------------
handle_info(_Info, State) ->
{noreply, State}.
%%--------------------------------------------------------------------
%% @spec terminate(Reason, State) -> void()
%% @doc This function is called by a gen_server when it is about to
%% terminate. It should be the opposite of Module:init/1 and do any necessary
%% cleaning up. When it returns, the gen_server terminates with Reason.
%% The return value is ignored.
%% @end
%%--------------------------------------------------------------------
terminate(_Reason, #state{index=Index,keys=Keys}) ->
error_logger:info_msg("shutting down and closing~n"),
file:sync(Index),
file:sync(Keys),
ok = file:close(Index),
ok = file:close(Keys).
%%--------------------------------------------------------------------
%% @spec code_change(OldVsn, State, Extra) -> {ok, NewState}
%% @doc Convert process state when code is changed
%% @end
%%--------------------------------------------------------------------
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
int_read_key(Keys, [0 | Key]) ->
lists:reverse(Key);
int_read_key(Keys, Key) ->
case file:read(Keys, 1) of
{ok, [Char]} -> int_read_key(Keys, [Char|Key]);
Other -> Other
end.
Raw
output.txt
=INFO REPORT==== 6-Aug-2008::22:35:08 ===
writing <<0,0,15,241>> bytes at 0
=INFO REPORT==== 6-Aug-2008::22:35:08 ===
could not find offset
=INFO REPORT==== 6-Aug-2008::22:35:08 ===
writing <<0,0,0,0,0,0,0,0>> bytes at 4
=INFO REPORT==== 6-Aug-2008::22:35:08 ===
writing root offset 12
=INFO REPORT==== 6-Aug-2008::22:35:08 ===
writing <<0,0,0,0,0,0,0,12>> bytes at 4
=INFO REPORT==== 6-Aug-2008::22:35:08 ===
writing root offset 8174
=INFO REPORT==== 6-Aug-2008::22:35:08 ===
writing <<0,0,0,0,0,0,31,238>> bytes at 4
=INFO REPORT==== 6-Aug-2008::22:35:08 ===
read {ok,<<0,0,0,0,0,0,31,238>>}
=INFO REPORT==== 6-Aug-2008::22:35:08 ===
writing <<0,0,0,0,0,0,31,238>> bytes at 4
=INFO REPORT==== 6-Aug-2008::22:35:09 ===
read {ok,<<0,0,15,241,0,0,0,0,0,0,0,12,1,0,0,0,1,37,197,33,37,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>>}
=INFO REPORT==== 6-Aug-2008::22:35:09 ===
shutting down and closing
=INFO REPORT==== 6-Aug-2008::22:35:09 ===
closed
=INFO REPORT==== 6-Aug-2008::22:35:09 ===
read offset <<0,0,0,0,0,0,0,12>> 12
=INFO REPORT==== 6-Aug-2008::22:35:09 ===
tree {dmerkle,<0.47.0>,4081,
{node,1,
[3096094929],
[{2678689551,4093},{3072454548,12}],
8174},
254}
new tree {dmerkle,<0.48.0>,4081,
{leaf,1,[{633676069,0,651931632}],12},
254}
dmerkle:open_and_insert_260_test (module 'dmerkle')...
=INFO REPORT==== 6-Aug-2008::22:35:10 ===
shutting down and closing
*failed*
::error:{badmatch,not_found}
in function dmerkle:open_and_insert_260_test/0
in call from eunit_test:'-function_wrapper/2-fun-0-'/2
Raw
test.erl
open_and_insert_260_test() ->
test_cleanup(),
Tree = lists:foldl(fun(N, Tree) ->
update(lists:concat(["key", N]), lists:concat(["value", N]), Tree)
end, open("/Users/cliff/data/dmerkle", 4096), lists:seq(1,260)),
Hash = hash("value200"),
Hash = find("key200", Tree),
File = Tree#dmerkle.file,
error_logger:info_msg("read ~p ~n", [block_server:read_block(File, 4, 8)]),
block_server:write_block(File, 4, <<8174:64>>),
timer:sleep(1000),
error_logger:info_msg("read ~p ~n", [file:read_file("/Users/cliff/data/merkle.idx")]),
close(Tree),
error_logger:info_msg("closed~n"),
NewTree = open("/Users/cliff/data/merkle", 4096),
error_logger:info_msg("tree ~p~n new tree ~p~n", [Tree, NewTree]),
timer:sleep(1000),
Hash2 = hash("value133"),
Hash2 = find("key133", NewTree),
close(NewTree).
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