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#
# 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 "socket"
require "qpid/codec"
include Codec
module Qpid
class Connection
def initialize(host, port, spec)
@host = host
@port = port
@spec = spec
end
attr_reader(:host, :port, :spec)
def connect()
@sock = TCPSocket.open(@host, @port)
@out = Encoder.new(@sock)
@in = Decoder.new(@sock)
end
def init()
@out.write("AMQP")
[1, 1, @spec.major, @spec.minor].each {|o|
@out.octet(o)
}
end
def write(frame)
@out.octet(@spec.constants[frame.payload.type].id)
@out.short(frame.channel)
frame.payload.encode(@out)
@out.octet(frame_end)
end
def read()
type = @spec.constants[@in.octet()].name
channel = @in.short()
payload = Payload.decode(type, @spec, @in)
oct = @in.octet()
if oct != frame_end
raise Exception.new("framing error: expected #{frame_end}, got #{oct}")
end
Frame.new(channel, payload)
end
private
def frame_end
@spec.constants[:"frame end"].id
end
end
class Frame
def initialize(channel, payload)
@channel = channel
@payload = payload
end
attr_reader(:channel, :payload)
end
class Payload
TYPES = {}
def Payload.singleton_method_added(name)
if name == :type
TYPES[type] = self
end
end
def Payload.decode(type, spec, dec)
klass = TYPES[type]
klass.decode(spec, dec)
end
end
class Method < Payload
def initialize(method, args)
if args.size != method.fields.size
raise ArgumentError.new("argument mismatch #{method} #{args}")
end
@method = method
@args = args
end
attr_reader(:method, :args)
def Method.type
:"frame method"
end
def type; Method.type end
def encode(encoder)
buf = StringWriter.new()
enc = Encoder.new(buf)
enc.short(@method.parent.id)
enc.short(@method.id)
@method.fields.zip(self.args).each {|f, a|
enc.encode(f.type, a)
}
enc.flush()
encoder.longstr(buf.to_s)
end
def Method.decode(spec, decoder)
buf = decoder.longstr()
dec = Decoder.new(StringReader.new(buf))
klass = spec.classes[dec.short()]
meth = klass.methods[dec.short()]
args = meth.fields.map {|f| dec.decode(f.type)}
return Method.new(meth, args)
end
end
end
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