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aerospike.go
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aerospike.go
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// +build !app_engine
package luaLib
const LibAerospike = `
-- The Lua Interface to Aerospike
--
-- ======================================================================
-- Copyright [2014] Aerospike, Inc.. Portions may be licensed
-- to Aerospike, Inc. under one or more contributor license agreements.
--
-- 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.
-- ======================================================================
-- A table to track whether we had sandboxed a function
sandboxed = {}
ldebug = debug;
-- ############################################################################
--
-- LOG FUNCTIONS
--
-- ############################################################################
function trace(m, ...)
return aerospike:log(4, string.format(m, ...))
end
function debug(m, ...)
return aerospike:log(3, string.format(m, ...))
end
function info(m, ...)
return aerospike:log(2, string.format(m, ...))
end
function warn(m, ...)
return aerospike:log(1, string.format(m, ...))
end
-- ############################################################################
--
-- APPLY FUNCTIONS
--
-- ############################################################################
--
-- Creates a new environment for use in apply_record functions
--
function env_record()
return {
-- aerospike types
["record"] = record,
["iterator"] = iterator,
["list"] = list,
["map"] = map,
["bytes"] = bytes,
["aerospike"] = aerospike,
["putX"] = putX,
-- logging functions
["trace"] = trace,
["debug"] = debug,
["info"] = info,
["warn"] = warn,
-- standard lua functions
["collectgarbage"] = collectgarbage,
["error"] = error,
["getmetatable"] = getmetatable,
["ipairs"] = ipairs,
["load"] = loadstring,
["module"] = module,
["next"] = next,
["pairs"] = pairs,
["print"] = print,
["pcall"] = pcall,
["rawequal"] = rawequal,
["rawget"] = rawget,
["rawset"] = rawset,
["require"] = require,
["require"] = require,
["select"] = select,
["setmetatable"] = setmetatable,
["setfenv"] = setfenv,
["tonumber"] = tonumber,
["tostring"] = tostring,
["type"] = type,
["unpack"] = unpack,
["xpcall"] = xpcall,
-- standard lua objects
["math"] = math,
["io"] = io,
["os"] = {
['clock'] = os.clock,
['date'] = os.date,
['difftime'] = os.difftime,
['getenv'] = os.getenv,
['setlocale'] = os.setlocale,
['time'] = os.time,
['tmpname'] = os.tmpname
},
["package"] = package,
["string"] = string,
["table"] = table,
-- standard lua variables
["_G"] = {}
}
end
--
-- Apply function to a record and arguments.
--
-- @param f the fully-qualified name of the function.
-- @param r the record to be applied to the function.
-- @param ... additional arguments to be applied to the function.
-- @return result of the called function or nil.
--
function apply_record(f, r, ...)
if f == nil then
error("function not found", 2)
end
if not sandboxed[f] then
setfenv(f,env_record())
sandboxed[f] = true
end
success, result = pcall(f, r, ...)
if success then
return result
else
error(result, 2)
return nil
end
end
--
-- Apply function to an iterator and arguments.
--
-- @param f the fully-qualified name of the function.
-- @param s the iterator to be applied to the function.
-- @param ... additional arguments to be applied to the function.
-- @return 0 on success, otherwise failure.
--
function apply_stream(f, scope, istream, ostream, ...)
if f == nil then
error("function not found", 2)
return 2
end
--require("stream_ops")
if not sandboxed[f] then
setfenv(f,env_record())
sandboxed[f] = true
end
local stream_ops = StreamOps_create();
success, result = pcall(f, stream_ops, ...)
-- info("apply_stream: success=%s, result=%s", tostring(success), tostring(result))
if success then
local ops = StreamOps_select(result.ops, scope);
-- Apply server operations to the stream
-- result => a stream_ops object
local values = StreamOps_apply(stream_iterator(istream), ops);
-- Iterate the stream of values from the computation
-- then pipe it to the ostream
for value in values do
-- info("value = %s", tostring(value))
stream.write(ostream, value)
end
-- 0 is success
return 0
else
error(result, 2)
return 2
end
end
`