1 files changed, 148 insertions, 0 deletions
diff --git a/ruby/lib/qpid/assembler.rb b/ruby/lib/qpid/assembler.rb
new file mode 100644
index 0000000000..b768c3f195
--- /dev/null
+++ b/ruby/lib/qpid/assembler.rb
@@ -0,0 +1,148 @@
+#
+# 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.
+#
+
+module Qpid
+
+  class << self
+    attr_accessor :asm_logger
+  end
+
+  class Segment
+
+    attr_reader :type, :payload, :track, :channel
+    attr_accessor :id, :offset
+
+    def initialize(first, last, type, track, channel, payload)
+      @id = nil
+      @offset = nil
+      @first = first
+      @last = last
+      @type = type
+      @track = track
+      @channel = channel
+      @payload = payload
+    end
+
+    def first_segment? ; @first ; end
+
+    def last_segment? ; @last ; end
+
+    def decode(spec)
+      segs = spec[:segment_type]
+      choice = segs.enum.choices[type]
+      return method("decode_#{choice.name}").call(spec)
+    end
+
+    def decode_control(spec)
+      sc = StringCodec.new(spec, payload)
+      return sc.read_control()
+    end
+
+    def decode_command(spec)
+      sc = StringCodec.new(spec, payload)
+      hdr, cmd = sc.read_command()
+      cmd.id = id
+      return hdr, cmd
+    end
+
+    def decode_header(spec)
+      sc = StringCodec.new(spec, payload)
+      values = []
+      until sc.encoded.empty?
+        values << sc.read_struct32()
+      end
+      return values
+    end
+
+    def decode_body(spec)
+      payload
+    end
+
+    def append(frame)
+      @payload += frame.payload
+    end
+
+    def to_s
+      f = first_segment? ? 'F' : '.'
+      l = last_segment? ? 'L' : '.'
+      return "%s%s %s %s %s %s" % [f, l, @type,
+                                   @track, @channel, @payload.inspect]
+    end
+
+  end
+
+  class Assembler < Framer
+
+    def logger; Qpid::asm_logger; end
+
+    def initialize(sock, max_payload = Frame::MAX_PAYLOAD)
+      super(sock)
+      @max_payload = max_payload
+      @fragments = {}
+    end
+
+    def read_segment
+      loop do
+        frame = read_frame
+        key = [frame.channel, frame.track]
+        seg = @fragments[key]
+        unless seg
+          seg = Segment.new(frame.first_segment?,
+                            frame.last_segment?,
+                            frame.type, frame.track,
+                            frame.channel, "")
+          @fragments[key] = seg
+        end
+
+        seg.append(frame)
+
+        if frame.last_frame?
+          @fragments.delete(key)
+          logger.debug("RECV #{seg}") if logger
+          return seg
+        end
+      end
+    end
+
+    def write_segment(segment)
+      remaining = segment.payload
+
+      first = true
+      while first or remaining
+        payload = remaining[0, @max_payload]
+        remaining = remaining[@max_payload, remaining.size]
+
+        flags = 0
+
+        flags |= FIRST_FRM if first
+        flags |= LAST_FRM  unless remaining
+        flags |= FIRST_SEG if segment.first_segment?
+        flags |= LAST_SEG  if segment.last_segment?
+
+        frame = Frame.new(flags, segment.type, segment.track,
+                          segment.channel, payload)
+        write_frame(frame)
+
+        first = false
+      end
+
+      logger.debug("SENT #{segment}") if logger
+    end
+  end
+end