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Extract common codes to implement asynchronous handler from the dump …
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| # Copyright (C) 2014-2015 Droonga Project | ||
| # | ||
| # This library is free software; you can redistribute it and/or | ||
| # modify it under the terms of the GNU Lesser General Public | ||
| # License version 2.1 as published by the Free Software Foundation. | ||
| # | ||
| # This library is distributed in the hope that it will be useful, | ||
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| # Lesser General Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU Lesser General Public | ||
| # License along with this library; if not, write to the Free Software | ||
| # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
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| require "coolio" | ||
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| require "droonga/handler" | ||
| require "droonga/error_messages" | ||
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| module Droonga | ||
| module Plugins | ||
| module AsyncCommand | ||
| class Request | ||
| def initialize(message) | ||
| @message = message | ||
| end | ||
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| def need_start? | ||
| reply_to | ||
| end | ||
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| def id | ||
| @message["id"] | ||
| end | ||
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| def dataset | ||
| @message.raw["dataset"] | ||
| end | ||
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| def reply_to | ||
| (@message.raw["replyTo"] || {})["to"] | ||
| end | ||
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| def messages_per_seconds | ||
| request = (@message.request || {}) | ||
| minimum_messages_per_seconds = 10 | ||
| [ | ||
| minimum_messages_per_seconds, | ||
| (request["messagesPerSecond"] || 10000).to_i, | ||
| ].max | ||
| end | ||
| end | ||
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| class Handler < Droonga::Handler | ||
| def handle(message) | ||
| request = Request.new(message) | ||
| if request.need_start? | ||
| start(request) | ||
| true | ||
| else | ||
| false | ||
| end | ||
| end | ||
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| def start(request) | ||
| #XXX override me! | ||
| # handler = MyAsyncHandler.new(loop, messenger, request) | ||
| # handler.start | ||
| end | ||
| end | ||
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| class AsyncHandler | ||
| def initialize(loop, messenger, request) | ||
| @loop = loop | ||
| @messenger = messenger | ||
| @request = request | ||
| end | ||
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| def start | ||
| setup_forward_data | ||
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| forward("#{prefix}.start") | ||
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| runner = Fiber.new do | ||
| handle | ||
| forward("#{prefix}.end") | ||
| end | ||
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| timer = Coolio::TimerWatcher.new(0.1, true) | ||
| timer.on_timer do | ||
| begin | ||
| runner.resume | ||
| rescue FiberError | ||
| timer.detach | ||
| logger.trace("start: watcher detached on FiberError", | ||
| :watcher => timer) | ||
| rescue | ||
| timer.detach | ||
| logger.trace("start: watcher detached on unexpected exception", | ||
| :watcher => timer) | ||
| logger.exception(error_message, $!) | ||
| error(error_name, error_message) | ||
| end | ||
| end | ||
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| @loop.attach(timer) | ||
| logger.trace("start: new watcher attached", | ||
| :watcher => timer) | ||
| end | ||
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| private | ||
| def prefix | ||
| "" #XXX override me!! | ||
| end | ||
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| def handle | ||
| #XXX override me!! | ||
| end | ||
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| def setup_forward_data | ||
| @base_forward_message = { | ||
| "inReplyTo" => @request.id, | ||
| "dataset" => @request.dataset, | ||
| } | ||
| @forward_to = @request.reply_to | ||
| @n_forwarded_messages = 0 | ||
| @messages_per_100msec = @request.messages_per_seconds / 10 | ||
| end | ||
|
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| def error_name | ||
| "Failure" #XXX override me!! | ||
| end | ||
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| def error_message | ||
| "failed to do" #XXX override me!! | ||
| end | ||
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| def error(name, message) | ||
| message = { | ||
| "statusCode" => ErrorMessages::InternalServerError::STATUS_CODE, | ||
| "body" => { | ||
| "name" => name, | ||
| "message" => message, | ||
| }, | ||
| } | ||
| error_message = @base_forward_message.merge(message) | ||
| @messenger.forward(error_message, | ||
| "to" => @forward_to, | ||
| "type" => "#{prefix}.error") | ||
| end | ||
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| def forward(type, body=nil) | ||
| forward_message = @base_forward_message | ||
| if body | ||
| forward_message = forward_message.merge("body" => body) | ||
| end | ||
| @messenger.forward(forward_message, | ||
| "to" => @forward_to, | ||
| "type" => type) | ||
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| @n_forwarded_messages += 1 | ||
| @n_forwarded_messages %= @messages_per_100msec | ||
| Fiber.yield if @n_forwarded_messages.zero? | ||
| end | ||
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| def log_tag | ||
| "[#{Process.ppid}] async-handler" | ||
| end | ||
| end | ||
| end | ||
| end | ||
| end |
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