Notestore wrapper updated for oauth, add transforms from ruby method names to camel-case names in the thrift interface

1 files changed, 305 insertions, 0 deletions

diff --git a/vendor/thrift/server/nonblocking_server.rb b/vendor/thrift/server/nonblocking_server.rb
new file mode 100644
index 0000000..740f341
--- /dev/null
+++ b/vendor/thrift/server/nonblocking_server.rb
@@ -0,0 +1,305 @@
+# 
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# 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.
+# 
+
+require 'logger'
+require 'thread'
+
+module Thrift
+  # this class expects to always use a FramedTransport for reading messages
+  class NonblockingServer < BaseServer
+    def initialize(processor, server_transport, transport_factory=nil, protocol_factory=nil, num=20, logger=nil)
+      super(processor, server_transport, transport_factory, protocol_factory)
+      @num_threads = num
+      if logger.nil?
+        @logger = Logger.new(STDERR)
+        @logger.level = Logger::WARN
+      else
+        @logger = logger
+      end
+      @shutdown_semaphore = Mutex.new
+      @transport_semaphore = Mutex.new
+    end
+
+    def serve
+      @logger.info "Starting #{self}"
+      @server_transport.listen
+      @io_manager = start_io_manager
+
+      begin
+        loop do
+          break if @server_transport.closed?
+          begin
+            rd, = select([@server_transport], nil, nil, 0.1)
+          rescue Errno::EBADF => e
+            # In Ruby 1.9, calling @server_transport.close in shutdown paths causes the select() to raise an
+            # Errno::EBADF. If this happens, ignore it and retry the loop.
+            break
+          end
+          next if rd.nil?
+          socket = @server_transport.accept
+          @logger.debug "Accepted socket: #{socket.inspect}"
+          @io_manager.add_connection socket
+        end
+      rescue IOError => e
+      end
+      # we must be shutting down
+      @logger.info "#{self} is shutting down, goodbye"
+    ensure
+      @transport_semaphore.synchronize do
+        @server_transport.close
+      end
+      @io_manager.ensure_closed unless @io_manager.nil?
+    end
+
+    def shutdown(timeout = 0, block = true)
+      @shutdown_semaphore.synchronize do
+        return if @is_shutdown
+        @is_shutdown = true
+      end
+      # nonblocking is intended for calling from within a Handler
+      # but we can't change the order of operations here, so lets thread
+      shutdown_proc = lambda do
+        @io_manager.shutdown(timeout)
+        @transport_semaphore.synchronize do
+          @server_transport.close # this will break the accept loop
+        end
+      end
+      if block
+        shutdown_proc.call
+      else
+        Thread.new &shutdown_proc
+      end
+    end
+
+    private
+
+    def start_io_manager
+      iom = IOManager.new(@processor, @server_transport, @transport_factory, @protocol_factory, @num_threads, @logger)
+      iom.spawn
+      iom
+    end
+
+    class IOManager # :nodoc:
+      DEFAULT_BUFFER = 2**20
+      
+      def initialize(processor, server_transport, transport_factory, protocol_factory, num, logger)
+        @processor = processor
+        @server_transport = server_transport
+        @transport_factory = transport_factory
+        @protocol_factory = protocol_factory
+        @num_threads = num
+        @logger = logger
+        @connections = []
+        @buffers = Hash.new { |h,k| h[k] = '' }
+        @signal_queue = Queue.new
+        @signal_pipes = IO.pipe
+        @signal_pipes[1].sync = true
+        @worker_queue = Queue.new
+        @shutdown_queue = Queue.new
+      end
+
+      def add_connection(socket)
+        signal [:connection, socket]
+      end
+
+      def spawn
+        @iom_thread = Thread.new do
+          @logger.debug "Starting #{self}"
+          run
+        end
+      end
+
+      def shutdown(timeout = 0)
+        @logger.debug "#{self} is shutting down workers"
+        @worker_queue.clear
+        @num_threads.times { @worker_queue.push [:shutdown] }
+        signal [:shutdown, timeout]
+        @shutdown_queue.pop
+        @signal_pipes[0].close
+        @signal_pipes[1].close
+        @logger.debug "#{self} is shutting down, goodbye"
+      end
+
+      def ensure_closed
+        kill_worker_threads if @worker_threads
+        @iom_thread.kill
+      end
+
+      private
+      
+      def run
+        spin_worker_threads
+
+        loop do
+          rd, = select([@signal_pipes[0], *@connections])
+          if rd.delete @signal_pipes[0]
+            break if read_signals == :shutdown
+          end
+          rd.each do |fd|
+            begin
+              if fd.handle.eof?
+                remove_connection fd
+              else
+                read_connection fd
+              end
+            rescue Errno::ECONNRESET
+              remove_connection fd
+            end
+          end
+        end
+        join_worker_threads(@shutdown_timeout)
+      ensure
+        @shutdown_queue.push :shutdown
+      end
+
+      def read_connection(fd)
+        @buffers[fd] << fd.read(DEFAULT_BUFFER)
+        while(frame = slice_frame!(@buffers[fd]))
+          @logger.debug "#{self} is processing a frame"
+          @worker_queue.push [:frame, fd, frame]
+        end
+      end
+
+      def spin_worker_threads
+        @logger.debug "#{self} is spinning up worker threads"
+        @worker_threads = []
+        @num_threads.times do
+          @worker_threads << spin_thread
+        end
+      end
+
+      def spin_thread
+        Worker.new(@processor, @transport_factory, @protocol_factory, @logger, @worker_queue).spawn
+      end
+
+      def signal(msg)
+        @signal_queue << msg
+        @signal_pipes[1].write " "
+      end
+
+      def read_signals
+        # clear the signal pipe
+        # note that since read_nonblock is broken in jruby,
+        # we can only read up to a set number of signals at once
+        sigstr = @signal_pipes[0].readpartial(1024)
+        # now read the signals
+        begin
+          sigstr.length.times do
+            signal, obj = @signal_queue.pop(true)
+            case signal
+            when :connection
+              @connections << obj
+            when :shutdown
+              @shutdown_timeout = obj
+              return :shutdown
+            end
+          end
+        rescue ThreadError
+          # out of signals
+          # note that in a perfect world this would never happen, since we're
+          # only reading the number of signals pushed on the pipe, but given the lack
+          # of locks, in theory we could clear the pipe/queue while a new signal is being
+          # placed on the pipe, at which point our next read_signals would hit this error
+        end
+      end
+
+      def remove_connection(fd)
+        # don't explicitly close it, a thread may still be writing to it
+        @connections.delete fd
+        @buffers.delete fd
+      end
+
+      def join_worker_threads(shutdown_timeout)
+        start = Time.now
+        @worker_threads.each do |t|
+          if shutdown_timeout > 0
+            timeout = (start + shutdown_timeout) - Time.now
+            break if timeout <= 0
+            t.join(timeout)
+          else
+            t.join
+          end
+        end
+        kill_worker_threads
+      end
+
+      def kill_worker_threads
+        @worker_threads.each do |t|
+          t.kill if t.status
+        end
+        @worker_threads.clear
+      end
+
+      def slice_frame!(buf)
+        if buf.length >= 4
+          size = buf.unpack('N').first
+          if buf.length >= size + 4
+            buf.slice!(0, size + 4)
+          else
+            nil
+          end
+        else
+          nil
+        end
+      end
+
+      class Worker # :nodoc:
+        def initialize(processor, transport_factory, protocol_factory, logger, queue)
+          @processor = processor
+          @transport_factory = transport_factory
+          @protocol_factory = protocol_factory
+          @logger = logger
+          @queue = queue
+        end
+
+        def spawn
+          Thread.new do
+            @logger.debug "#{self} is spawning"
+            run
+          end
+        end
+
+        private
+
+        def run
+          loop do
+            cmd, *args = @queue.pop
+            case cmd
+            when :shutdown
+              @logger.debug "#{self} is shutting down, goodbye"
+              break
+            when :frame
+              fd, frame = args
+              begin
+                otrans = @transport_factory.get_transport(fd)
+                oprot = @protocol_factory.get_protocol(otrans)
+                membuf = MemoryBufferTransport.new(frame)
+                itrans = @transport_factory.get_transport(membuf)
+                iprot = @protocol_factory.get_protocol(itrans)
+                @processor.process(iprot, oprot)
+              rescue => e
+                @logger.error "#{Thread.current.inspect} raised error: #{e.inspect}\n#{e.backtrace.join("\n")}"
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end