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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.
#
# Console API for Qpid Management Framework
require 'socket'
require 'monitor'
require 'thread'
require 'uri'
require 'time'
module Qpid::Qmf
# To access the asynchronous operations, a class must be derived from
# Console with overrides of any combination of the available methods.
class Console
# Invoked when a connection is established to a broker
def broker_connected(broker); end
# Invoked when the connection to a broker is lost
def broker_disconnected(broker); end
# Invoked when a QMF package is discovered
def new_package(name); end
# Invoked when a new class is discovered. Session.getSchema can be
# used to obtain details about the class
def new_class(kind, klass_key); end
# Invoked when a QMF agent is discovered
def new_agent(agent); end
# Invoked when a QMF agent disconects
def del_agent(agent); end
# Invoked when an object is updated
def object_props(broker, record); end
# Invoked when an object is updated
def object_stats(broker, record); end
# Invoked when an event is raised
def event(broker, event); end
# Invoked when an agent heartbeat is received.
def heartbeat(agent, timestamp); end
# Invoked when the connection sequence reaches the point where broker information is available.
def broker_info(broker); end
# Invoked when a method response from an asynchronous method call is received.
def method_response(broker, seq, response); end
end
class BrokerURL
attr_reader :host, :port, :auth_name, :auth_pass
def initialize(text)
uri = URI.parse(text)
@host = uri.host
@port = uri.port ? uri.port : 5672
@auth_name = uri.user
@auth_pass = uri.password
return uri
end
def name
"#{@host}:#{@port}"
end
def match(host, port)
# FIXME: Unlcear what the Python code is actually checking for
# here, especially since HOST can resolve to multiple IP's
@port == port &&
(host == @host || ipaddr(host, port) == ipaddr(@host, @port))
end
private
def ipaddr(host, port)
s = Socket::getaddrinfo(host, port,
Socket::AF_INET, Socket::SOCK_STREAM)
s[0][2]
end
end
# An instance of the Session class represents a console session running
# against one or more QMF brokers. A single instance of Session is
# needed to interact with the management framework as a console.
class Session
CONTEXT_SYNC = 1
CONTEXT_STARTUP = 2
CONTEXT_MULTIGET = 3
DEFAULT_GET_WAIT_TIME = 60
include MonitorMixin
attr_reader :binding_key_list, :select, :seq_mgr, :console, :packages
# Initialize a session. If the console argument is provided, the
# more advanced asynchronous features are available. If console is
# defaulted, the session will operate in a simpler, synchronous
# manner. The rcvObjects, rcvEvents, and rcvHeartbeats arguments
# are meaningful only if 'console' is provided. They control
# whether object updates, events, and agent-heartbeats are
# subscribed to. If the console is not interested in receiving one
# or more of the above, setting the argument to False will reduce
# tha bandwidth used by the API. If manageConnections is set to
# True, the Session object will manage connections to the brokers.
# This means that if a broker is unreachable, it will retry until a
# connection can be established. If a connection is lost, the
# Session will attempt to reconnect.
#
# If manageConnections is set to False, the user is responsible for
# handing failures. In this case, an unreachable broker will cause
# addBroker to raise an exception. If userBindings is set to False
# (the default) and rcvObjects is True, the console will receive
# data for all object classes. If userBindings is set to True, the
# user must select which classes the console shall receive by
# invoking the bindPackage or bindClass methods. This allows the
# console to be configured to receive only information that is
# relavant to a particular application. If rcvObjects id False,
# userBindings has no meaning.
#
# Accept a hash of parameters, where keys can be :console,
# :rcv_objects, :rcv_events, :rcv_heartbeats, :manage_connections,
# and :user_bindings
def initialize(kwargs = {})
super()
@console = kwargs[:console] || nil
@brokers = []
@packages = {}
@seq_mgr = SequenceManager.new
@cv = new_cond
@sync_sequence_list = []
@result = []
@select = []
@error = nil
@rcv_objects = kwargs[:rcv_objects] == nil ? true : kwargs[:rcv_objects]
@rcv_events = kwargs[:rcv_events] == nil ? true : kwargs[:rcv_events]
@rcv_heartbeats = kwargs[:rcv_heartbeats] == nil ? true : kwargs[:rcv_heartbeats]
@user_bindings = kwargs[:user_bindings] == nil ? false : kwargs[:user_bindings]
unless @console
@rcv_objects = false
@rcv_events = false
@rcv_heartbeats = false
end
@binding_key_list = binding_keys
@manage_connections = kwargs[:manage_connections] || false
if @user_bindings && ! @rcv_objects
raise ArgumentError, "user_bindings can't be set unless rcv_objects is set and a console is provided"
end
end
def to_s
"QMF Console Session Manager (brokers: #{@brokers.size})"
end
def managedConnections?
return @manage_connections
end
# Connect to a Qpid broker. Returns an object of type Broker
#
# To supply a username for authentication, use the URL syntax:
#
# amqp://username@hostname:port
#
# If the broker needs a password for the client, an interactive prompt will be
# provided to the user.
#
# To supply a username and a password, use
#
# amqp://username:password@hostname:port
#
# The following keyword arguments may be used to control authentication:
#
# :mechanism - SASL mechanism (i.e. "PLAIN", "GSSAPI", "ANONYMOUS", etc.
# - defaults to unspecified (the system chooses for you)
# :service - SASL service name (i.e. the kerberos principal of the broker)
# - defaults to "qpidd"
# :min_ssf - Minimum Security Strength Factor for SASL security layers
# - defaults to 0
# :max_ssf - Maximum Security Strength Factor for SASL security layers
# - defaults to 65535
#
def add_broker(target = "amqp://localhost", kwargs = {})
url = BrokerURL.new(target)
broker = Broker.new(self, url.host, url.port, url.auth_name, url.auth_pass, kwargs)
unless broker.connected? || @manage_connections
raise broker.error
end
@brokers << broker
objects(:broker => broker, :class => "agent") unless @manage_connections
return broker
end
# Disconnect from a broker. The 'broker' argument is the object
# returned from the addBroker call
def del_broker(broker)
broker.shutdown
@brokers.delete(broker)
end
# Get the list of known classes within a QMF package
def classes(package_name)
list = []
@brokers.each { |broker| broker.wait_for_stable }
if @packages.include?(package_name)
# FIXME What's the actual structure of @packages[package_name]
@packages[package_name].each do |key, schema_class|
list << schema_class.klass_key
end
end
return list
end
# Get the schema for a QMF class
def schema(klass_key)
@brokers.each { |broker| broker.wait_for_stable }
if @packages.include?(klass_key.package)
@packages[klass_key.package][ [klass_key.klass_name, klass_key.hash] ]
end
end
def bind_package(package_name)
unless @user_bindings && @rcv_objects
raise "userBindings option not set for Session"
end
@brokers.each do |broker|
args = { :exchange => "qpid.management",
:queue => broker.topic_name,
:binding_key => "console.obj.*.*.#{package_name}.#" }
broker.amqp_session.exchange_bind(args)
end
end
def bind_class(package_name, class_name)
unless @user_bindings && @rcv_objects
raise "userBindings option not set for Session"
end
@brokers.each do |broker|
args = { :exchange => "qpid.management",
:queue => broker.topic_name,
:binding_key=> "console.obj.*.*.#{package_name}.#{class_name}.#" }
broker.amqp_session.exchange_bind(args)
end
end
def bind_class_key(klass_key)
unless @user_bindings && @rcv_objects
raise "userBindings option not set for Session"
end
pname, cname, hash = klass_key.to_a()
@brokers.each do |broker|
args = { :exchange => "qpid.management",
:queue => broker.topic_name,
:binding_key => "console.obj.*.*.#{pname}.#{cname}.#" }
broker.amqp_session.exchange_bind(args)
end
end
# Get a list of currently known agents
def agents(broker=nil)
broker_list = []
if broker.nil?
broker_list = @brokers.dup
else
broker_list << broker
end
broker_list.each { |b| b.wait_for_stable }
agent_list = []
broker_list.each { |b| agent_list += b.agents }
return agent_list
end
# Get a list of objects from QMF agents.
# All arguments are passed by name(keyword).
#
# The class for queried objects may be specified in one of the
# following ways:
# :schema => <schema> - supply a schema object returned from getSchema.
# :key => <key> - supply a klass_key from the list returned by getClasses.
# :class => <name> - supply a class name as a string. If the class name exists
# in multiple packages, a _package argument may also be supplied.
# :object_id = <id> - get the object referenced by the object-id
#
# If objects should be obtained from only one agent, use the following argument.
# Otherwise, the query will go to all agents.
#
# :agent = <agent> - supply an agent from the list returned by getAgents.
#
# If the get query is to be restricted to one broker (as opposed to
# all connected brokers), add the following argument:
#
# :broker = <broker> - supply a broker as returned by addBroker.
#
# The default timeout for this synchronous operation is 60 seconds. To change the timeout,
# use the following argument:
#
# :timeout = <time in seconds>
#
# If additional arguments are supplied, they are used as property
# selectors, as long as their keys are strings. For example, if
# the argument "name" => "test" is supplied, only objects whose
# "name" property is "test" will be returned in the result.
def objects(kwargs)
if kwargs.include?(:broker)
broker_list = []
broker_list << kwargs[:broker]
else
broker_list = @brokers
end
broker_list.each { |broker|
broker.wait_for_stable
if kwargs[:package] != "org.apache.qpid.broker" or kwargs[:class] != "agent"
objects(:agent => broker.agent(1,0), :package => "org.apache.qpid.broker", :class => "agent") if broker.connected?
end
}
agent_list = []
if kwargs.include?(:agent)
agent = kwargs[:agent]
unless broker_list.include?(agent.broker)
raise ArgumentError, "Supplied agent is not accessible through the supplied broker"
end
agent_list << agent if agent.broker.connected?
else
if kwargs.include?(:object_id)
oid = kwargs[:object_id]
broker_list.each { |broker|
broker.agents.each { |agent|
if oid.broker_bank == agent.broker_bank && oid.agent_bank == agent.agent_bank
agent_list << agent if agent.broker.connected?
end
}
}
else
broker_list.each { |broker|
agent_list += broker.agents if broker.connected?
}
end
end
cname = nil
if kwargs.include?(:schema)
# FIXME: What kind of object is kwargs[:schema]
pname, cname, hash = kwargs[:schema].getKey().to_a
elsif kwargs.include?(:key)
pname, cname, hash = kwargs[:key].to_a
elsif kwargs.include?(:class)
pname, cname, hash = [kwargs[:package], kwargs[:class], nil]
end
if cname.nil? && ! kwargs.include?(:object_id)
raise ArgumentError,
"No class supplied, use :schema, :key, :class, or :object_id' argument"
end
map = {}
@select = []
if kwargs.include?(:object_id)
map["_objectid"] = kwargs[:object_id].to_s
else
map["_class"] = cname
map["_package"] = pname if pname
map["_hash"] = hash if hash
kwargs.each do |k,v|
@select << [k, v] if k.is_a?(String)
end
end
@result = []
agent_list.each do |agent|
broker = agent.broker
send_codec = Qpid::StringCodec.new(broker.conn.spec)
seq = nil
synchronize do
seq = @seq_mgr.reserve(CONTEXT_MULTIGET)
@sync_sequence_list << seq
end
broker.set_header(send_codec, ?G, seq)
send_codec.write_map(map)
bank_key = "%d.%d" % [broker.broker_bank, agent.agent_bank]
smsg = broker.message(send_codec.encoded, "agent.#{bank_key}")
broker.emit(smsg)
end
timeout = false
if kwargs.include?(:timeout)
wait_time = kwargs[:timeout]
else
wait_time = DEFAULT_GET_WAIT_TIME
end
synchronize do
unless @cv.wait_for(wait_time) { @sync_sequence_list.empty? || @error }
@sync_sequence_list.each do |pending_seq|
@seq_mgr.release(pending_seq)
end
@sync_sequence_list = []
timeout = true
end
end
if @error
errorText = @error
@error = nil
raise errorText
end
if @result.empty? && timeout
raise "No agent responded within timeout period"
end
@result
end
# Return one and only one object or nil.
def object(kwargs)
objs = objects(kwargs)
return objs.length == 1 ? objs[0] : nil
end
# Return the first of potentially many objects.
def first_object(kwargs)
objs = objects(kwargs)
return objs.length > 0 ? objs[0] : nil
end
def set_event_filter(kwargs); end
def handle_broker_connect(broker); end
def handle_broker_resp(broker, codec, seq)
broker.broker_id = codec.read_uuid
@console.broker_info(broker) if @console
# Send a package request
# (effectively inc and dec outstanding by not doing anything)
send_codec = Qpid::StringCodec.new(broker.conn.spec)
seq = @seq_mgr.reserve(CONTEXT_STARTUP)
broker.set_header(send_codec, ?P, seq)
smsg = broker.message(send_codec.encoded)
broker.emit(smsg)
end
def handle_package_ind(broker, codec, seq)
pname = codec.read_str8
new_package = false
synchronize do
new_package = ! @packages.include?(pname)
@packages[pname] = {} if new_package
end
@console.new_package(pname) if @console
# Send a class request
broker.inc_outstanding
send_codec = Qpid::StringCodec.new(broker.conn.spec)
seq = @seq_mgr.reserve(CONTEXT_STARTUP)
broker.set_header(send_codec, ?Q, seq)
send_codec.write_str8(pname)
smsg = broker.message(send_codec.encoded)
broker.emit(smsg)
end
def handle_command_complete(broker, codec, seq)
code = codec.read_uint32
text = codec.read_str8
context = @seq_mgr.release(seq)
if context == CONTEXT_STARTUP
broker.dec_outstanding
elsif context == CONTEXT_SYNC && seq == broker.sync_sequence
broker.sync_done
elsif context == CONTEXT_MULTIGET && @sync_sequence_list.include?(seq)
synchronize do
@sync_sequence_list.delete(seq)
@cv.signal if @sync_sequence_list.empty?
end
end
end
def handle_class_ind(broker, codec, seq)
kind = codec.read_uint8
classKey = ClassKey.new(codec)
unknown = false
synchronize do
return unless @packages.include?(classKey.package)
unknown = true unless @packages[classKey.package].include?([classKey.klass_name, classKey.hash])
end
if unknown
# Send a schema request for the unknown class
broker.inc_outstanding
send_codec = Qpid::StringCodec.new(broker.conn.spec)
seq = @seq_mgr.reserve(CONTEXT_STARTUP)
broker.set_header(send_codec, ?S, seq)
classKey.encode(send_codec)
smsg = broker.message(send_codec.encoded)
broker.emit(smsg)
end
end
def handle_method_resp(broker, codec, seq)
code = codec.read_uint32
text = codec.read_str16
out_args = {}
pair = @seq_mgr.release(seq)
return unless pair
method, synchronous = pair
if code == 0
method.arguments.each do |arg|
if arg.dir.index(?O)
out_args[arg.name] = decode_value(codec, arg.type)
end
end
end
result = MethodResult.new(code, text, out_args)
if synchronous:
broker.synchronize do
broker.sync_result = MethodResult.new(code, text, out_args)
broker.sync_done
end
else
@console.method_response(broker, seq, result) if @console
end
end
def handle_heartbeat_ind(broker, codec, seq, msg)
if @console
broker_bank = 1
agent_bank = 0
dp = msg.get("delivery_properties")
if dp
key = dp["routing_key"]
key_elements = key.split(".")
if key_elements.length == 4
broker_bank = key_elements[2].to_i
agent_bank = key_elements[3].to_i
end
end
agent = broker.agent(broker_bank, agent_bank)
timestamp = codec.read_uint64
@console.heartbeat(agent, timestamp) if agent
end
end
def handle_event_ind(broker, codec, seq)
if @console
event = Event.new(self, broker, codec)
@console.event(broker, event)
end
end
def handle_schema_resp(broker, codec, seq)
kind = codec.read_uint8
classKey = ClassKey.new(codec)
klass = SchemaClass.new(self, kind, classKey, codec)
synchronize { @packages[classKey.package][ [classKey.klass_name, classKey.hash] ] = klass }
@seq_mgr.release(seq)
broker.dec_outstanding
@console.new_class(kind, classKey) if @console
end
def handle_content_ind(broker, codec, seq, prop=false, stat=false)
klass_key = ClassKey.new(codec)
pname, cname, hash = klass_key.to_a() ;
schema = nil
synchronize do
return unless @packages.include?(klass_key.package)
return unless @packages[klass_key.package].include?([klass_key.klass_name, klass_key.hash])
schema = @packages[klass_key.package][ [klass_key.klass_name, klass_key.hash] ]
end
object = Qpid::Qmf::Object.new(self, broker, schema, codec, prop, stat)
if pname == "org.apache.qpid.broker" && cname == "agent" && prop
broker.update_agent(object)
end
synchronize do
if @sync_sequence_list.include?(seq)
if object.timestamps()[2] == 0 && select_match(object)
@result << object
end
return
end
end
@console.object_props(broker, object) if @console && @rcv_objects && prop
@console.object_stats(broker, object) if @console && @rcv_objects && stat
end
def handle_broker_disconnect(broker); end
def handle_error(error)
synchronize do
@error = error if @sync_sequence_list.length > 0
@sync_sequence_list = []
@cv.signal
end
end
# Decode, from the codec, a value based on its typecode
def decode_value(codec, typecode)
case typecode
when 1: data = codec.read_uint8 # U8
when 2: data = codec.read_uint16 # U16
when 3: data = codec.read_uint32 # U32
when 4: data = codec.read_uint64 # U64
when 6: data = codec.read_str8 # SSTR
when 7: data = codec.read_str16 # LSTR
when 8: data = codec.read_int64 # ABSTIME
when 9: data = codec.read_uint64 # DELTATIME
when 10: data = ObjectId.new(codec) # REF
when 11: data = codec.read_uint8 != 0 # BOOL
when 12: data = codec.read_float # FLOAT
when 13: data = codec.read_double # DOUBLE
when 14: data = codec.read_uuid # UUID
when 15: data = codec.read_map # FTABLE
when 16: data = codec.read_int8 # S8
when 17: data = codec.read_int16 # S16
when 18: data = codec.read_int32 # S32
when 19: data = codec.read_int64 # S64
when 20: # Object
inner_type_code = codec.read_uint8()
if (inner_type_code == 20)
classKey = ClassKey.new(codec)
innerSchema = schema(classKey)
data = Object.new(self, @broker, innerSchema, codec, true, true, false) if innerSchema
else
data = decode_value(codec, inner_type_code)
end
when 21:
data = []
rec_codec = Qpid::StringCodec.new(codec.spec, codec.read_vbin32())
count = rec_codec.read_uint32()
while count > 0 do
type = rec_codec.read_uint8()
data << (decode_value(rec_codec,type))
count -= 1
end
when 22:
data = []
rec_codec = Qpid::StringCodec.new(codec.spec, codec.read_vbin32())
count = rec_codec.read_uint32()
type = rec_codec.read_uint8()
while count > 0 do
data << (decode_value(rec_codec,type))
count -= 1
end
else
raise ArgumentError, "Invalid type code: #{typecode} - #{typecode.inspect}"
end
return data
end
ENCODINGS = {
String => 6,
Fixnum => 18,
Bignum => 19,
Float => 12,
Array => 21,
Hash => 15
}
def encoding(object)
klass = object.class
if ENCODINGS.has_key?(klass)
return ENCODINGS[klass]
end
for base in klass.__bases__
result = encoding(base)
return result unless result.nil?
end
end
# Encode, into the codec, a value based on its typecode
def encode_value(codec, value, typecode)
# FIXME: Python does a lot of magic type conversions
# We just assume that value has the right type; this is safer
# than coercing explicitly, since Array::pack will complain
# loudly about various type errors
case typecode
when 1: codec.write_uint8(value) # U8
when 2: codec.write_uint16(value) # U16
when 3: codec.write_uint32(value) # U32
when 4: codec.write_uint64(value) # U64
when 6: codec.write_str8(value) # SSTR
when 7: codec.write_str16(value) # LSTR
when 8: codec.write_int64(value) # ABSTIME
when 9: codec.write_uint64(value) # DELTATIME
when 10: value.encode(codec) # REF
when 11: codec.write_uint8(value ? 1 : 0) # BOOL
when 12: codec.write_float(value) # FLOAT
when 13: codec.write_double(value) # DOUBLE
when 14: codec.write_uuid(value) # UUID
when 15: codec.write_map(value) # FTABLE
when 16: codec.write_int8(value) # S8
when 17: codec.write_int16(value) # S16
when 18: codec.write_int32(value) # S32
when 19: codec.write_int64(value) # S64
when 20: value.encode(codec)
when 21: # List
send_codec = Qpid::StringCodec.new(codec.spec)
encode_value(send_codec, value.size, 3)
value.each do v
ltype = encoding(v)
encode_value(send_codec,ltype,1)
encode_value(send_codec,v,ltype)
end
codec.write_vbin32(send_codec.encoded)
when 22: # Array
send_codec = Qpid::StringCodec.new(codec.spec)
encode_value(send_codec, value.size, 3)
if value.size > 0
ltype = encoding(value[0])
encode_value(send_codec,ltype,1)
value.each do v
encode_value(send_codec,v,ltype)
end
end
codec.write_vbin32(send_codec.encoded)
else
raise ValueError, "Invalid type code: %d" % typecode
end
end
def display_value(value, typecode)
case typecode
when 1: return value.to_s
when 2: return value.to_s
when 3: return value.to_s
when 4: return value.to_s
when 6: return value.to_s
when 7: return value.to_s
when 8: return strftime("%c", gmtime(value / 1000000000))
when 9: return value.to_s
when 10: return value.to_s
when 11: return value ? 'T' : 'F'
when 12: return value.to_s
when 13: return value.to_s
when 14: return Qpid::UUID::format(value)
when 15: return value.to_s
when 16: return value.to_s
when 17: return value.to_s
when 18: return value.to_s
when 19: return value.to_s
when 20: return value.to_s
when 21: return value.to_s
when 22: return value.to_s
else
raise ValueError, "Invalid type code: %d" % typecode
end
end
private
def binding_keys
key_list = []
key_list << "schema.#"
if @rcv_objects && @rcv_events && @rcv_heartbeats &&
! @user_bindings
key_list << "console.#"
else
if @rcv_objects && ! @user_bindings
key_list << "console.obj.#"
else
key_list << "console.obj.*.*.org.apache.qpid.broker.agent"
end
key_list << "console.event.#" if @rcv_events
key_list << "console.heartbeat.#" if @rcv_heartbeats
end
return key_list
end
# Check the object against select to check for a match
def select_match(object)
select.each do |key, value|
object.properties.each do |prop, propval|
return false if key == prop.name && value != propval
end
end
return true
end
end
class Package
attr_reader :name
def initialize(name)
@name = name
end
end
# A ClassKey uniquely identifies a class from the schema.
class ClassKey
attr_reader :package, :klass_name, :hash
def initialize(package="", klass_name="", hash=0)
if (package.kind_of?(Qpid::Codec))
@package = package.read_str8()
@klass_name = package.read_str8()
@hash = package.read_bin128()
else
@package = package
@klass_name = klass_name
@hash = hash
end
end
def encode(codec)
codec.write_str8(@package)
codec.write_str8(@klass_name)
codec.write_bin128(@hash)
end
def to_a()
return [@package, @klass_name, @hash]
end
def hash_string()
"%08x-%08x-%08x-%08x" % hash.unpack("NNNN")
end
def to_s()
return "#{@package}:#{@klass_name}(#{hash_string()})"
end
end
class SchemaClass
CLASS_KIND_TABLE = 1
CLASS_KIND_EVENT = 2
attr_reader :klass_key, :arguments, :super_klass_key
def initialize(session, kind, key, codec)
@session = session
@kind = kind
@klass_key = key
@super_klass_key = nil
@properties = []
@statistics = []
@methods = []
@arguments = []
has_supertype = 0 #codec.read_uint8
if @kind == CLASS_KIND_TABLE
prop_count = codec.read_uint16
stat_count = codec.read_uint16
method_count = codec.read_uint16
if has_supertype == 1
@super_klass_key = ClassKey.new(codec)
end
prop_count.times { |idx|
@properties << SchemaProperty.new(codec) }
stat_count.times { |idx|
@statistics << SchemaStatistic.new(codec) }
method_count.times { |idx|
@methods<< SchemaMethod.new(codec) }
elsif @kind == CLASS_KIND_EVENT
arg_count = codec.read_uint16
arg_count.times { |idx|
sa = SchemaArgument.new(codec, false)
@arguments << sa
}
end
end
def is_table?
@kind == CLASS_KIND_TABLE
end
def is_event?
@kind == CLASS_KIND_EVENT
end
def properties(include_inherited = true)
returnValue = @properties
if !@super_klass_key.nil? && include_inherited
returnValue = @properties + @session.schema(@super_klass_key).properties
end
return returnValue
end
def statistics(include_inherited = true)
returnValue = @statistics
if !@super_klass_key.nil? && include_inherited
returnValue = @statistics + @session.schema(@super_klass_key).statistics
end
return returnValue
end
def methods(include_inherited = true)
returnValue = @methods
if !@super_klass_key.nil? && include_inherited
returnValue = @methods + @session.schema(@super_klass_key).methods
end
return returnValue
end
def to_s
if @kind == CLASS_KIND_TABLE
kind_str = "Table"
elsif @kind == CLASS_KIND_EVENT
kind_str = "Event"
else
kind_str = "Unsupported"
end
"#{kind_str} Class: #{klass_key.to_s}"
end
end
class SchemaProperty
attr_reader :name, :type, :access, :index, :optional,
:unit, :min, :max, :maxlen, :desc, :refClass, :refPackage
def initialize(codec)
map = codec.read_map
@name = map["name"]
@type = map["type"]
@access = map["access"]
@index = map["index"] != 0
@optional = map["optional"] != 0
@unit = map["unit"]
@min = map["min"]
@max = map["max"]
@maxlen = map["maxlen"]
@desc = map["desc"]
@refClass = map["refClass"]
@refPackage = map["refPackage"]
end
def to_s
@name
end
end
class SchemaStatistic
attr_reader :name, :type, :unit, :desc, :refClass, :refPackage
def initialize(codec)
map = codec.read_map
@name = map["name"]
@type = map["type"]
@unit = map["unit"]
@desc = map["desc"]
@refClass = map["refClass"]
@refPackage = map["refPackage"]
end
def to_s
@name
end
end
class SchemaMethod
attr_reader :name, :desc, :arguments
def initialize(codec)
map = codec.read_map
@name = map["name"]
arg_count = map["argCount"]
@desc = map["desc"]
@arguments = []
arg_count.times { |idx|
@arguments << SchemaArgument.new(codec, true)
}
end
def to_s
result = @name + "("
first = true
result += @arguments.select { |arg| arg.dir.index(?I) }.join(", ")
result += ")"
return result
end
end
class SchemaArgument
attr_reader :name, :type, :dir, :unit, :min, :max, :maxlen
attr_reader :desc, :default, :refClass, :refPackage
def initialize(codec, method_arg)
map = codec.read_map
@name = map["name"]
@type = map["type"]
@dir = map["dir"].upcase if method_arg
@unit = map["unit"]
@min = map["min"]
@max = map["max"]
@maxlen = map["maxlen"]
@desc = map["desc"]
@default = map["default"]
@refClass = map["refClass"]
@refPackage = map["refPackage"]
end
end
# Object that represents QMF object identifiers
class ObjectId
include Comparable
attr_reader :first, :second
def initialize(codec, first=0, second=0)
if codec
@first = codec.read_uint64
@second = codec.read_uint64
else
@first = first
@second = second
end
end
def <=>(other)
return 1 unless other.is_a?(ObjectId)
return -1 if first < other.first
return 1 if first > other.first
return second <=> other.second
end
def to_s
"%d-%d-%d-%d-%d" % [flags, sequence, broker_bank, agent_bank, object]
end
def index
[first, second]
end
def flags
(first & 0xF000000000000000) >> 60
end
def sequence
(first & 0x0FFF000000000000) >> 48
end
def broker_bank
(first & 0x0000FFFFF0000000) >> 28
end
def agent_bank
first & 0x000000000FFFFFFF
end
def object
second
end
def durable?
sequence == 0
end
def encode(codec)
codec.write_uint64(first)
codec.write_uint64(second)
end
end
class Object
DEFAULT_METHOD_WAIT_TIME = 60
attr_reader :object_id, :schema, :properties, :statistics,
:current_time, :create_time, :delete_time, :broker
def initialize(session, broker, schema, codec, prop, stat, managed=true)
@session = session
@broker = broker
@schema = schema
if managed
@current_time = codec.read_uint64
@create_time = codec.read_uint64
@delete_time = codec.read_uint64
@object_id = ObjectId.new(codec)
end
@properties = []
@statistics = []
if prop
missing = parse_presence_masks(codec, schema)
schema.properties.each do |property|
v = nil
unless missing.include?(property.name)
v = @session.decode_value(codec, property.type)
end
@properties << [property, v]
end
end
if stat
schema.statistics.each do |statistic|
s = @session.decode_value(codec, statistic.type)
@statistics << [statistic, s]
end
end
end
def klass_key
@schema.klass_key
end
def methods
@schema.methods
end
# Return the current, creation, and deletion times for this object
def timestamps
return [@current_time, @create_time, @delete_time]
end
# Return a string describing this object's primary key
def index
@properties.select { |property, value|
property.index
}.collect { |property,value|
@session.display_value(value, property.type) }.join(":")
end
# Replace properties and/or statistics with a newly received update
def merge_update(newer)
unless object_id == newer.object_id
raise "Objects with different object-ids"
end
@properties = newer.properties unless newer.properties.empty?
@statistics = newer.statistics unless newer.statistics.empty?
end
def update
obj = @session.object(:object_id => @object_id, :broker => @broker)
if obj
merge_update(obj)
else
raise "Underlying object no longer exists."
end
end
def to_s
@schema.klass_key.to_s
end
# This must be defined because ruby has this (deprecated) method built in.
def id
method_missing(:id)
end
# Same here..
def type
method_missing(:type)
end
def name
method_missing(:name)
end
def method_missing(name, *args)
name = name.to_s
if method = @schema.methods.find { |method| name == method.name }
return invoke(method, name, args)
end
@properties.each do |property, value|
return value if name == property.name
if name == "_#{property.name}_" && property.type == 10
# Dereference references
deref = @session.objects(:object_id => value, :broker => @broker)
return nil unless deref.size == 1
return deref[0]
end
end
@statistics.each do |statistic, value|
if name == statistic.name
return value
end
end
raise "Type Object has no attribute '#{name}'"
end
def encode(codec)
codec.write_uint8(20)
@schema.klass_key.encode(codec)
# emit presence masks for optional properties
mask = 0
bit = 0
schema.properties.each do |property|
if prop.optional
bit = 1 if bit == 0
mask |= bit if value
bit = bit << 1
if bit == 256
bit = 0
codec.write_uint8(mask)
mask = 0
end
codec.write_uint8(mask) if bit != 0
end
end
# encode properties
@properties.each do |property, value|
@session.encode_value(codec, value, prop.type) if value
end
# encode statistics
@statistics.each do |statistic, value|
@session.encode_value(codec, value, stat.type)
end
end
private
def send_method_request(method, name, args, synchronous = false, time_wait = nil)
@schema.methods.each do |schema_method|
if name == schema_method.name
send_codec = Qpid::StringCodec.new(@broker.conn.spec)
seq = @session.seq_mgr.reserve([schema_method, synchronous])
@broker.set_header(send_codec, ?M, seq)
@object_id.encode(send_codec)
@schema.klass_key.encode(send_codec)
send_codec.write_str8(name)
formals = method.arguments.select { |arg| arg.dir.index(?I) }
count = method.arguments.select { |arg| arg.dir.index(?I) }.size
unless formals.size == args.size
raise "Incorrect number of arguments: expected #{formals.size}, got #{args.size}"
end
formals.zip(args).each do |formal, actual|
@session.encode_value(send_codec, actual, formal.type)
end
ttl = time_wait ? time_wait * 1000 : nil
smsg = @broker.message(send_codec.encoded,
"agent.#{object_id.broker_bank}.#{object_id.agent_bank}", ttl=ttl)
@broker.sync_start if synchronous
@broker.emit(smsg)
return seq
end
end
end
def invoke(method, name, args)
kwargs = args[args.size - 1]
sync = true
timeout = DEFAULT_METHOD_WAIT_TIME
if kwargs.class == Hash
if kwargs.include?(:timeout)
timeout = kwargs[:timeout]
end
if kwargs.include?(:async)
sync = !kwargs[:async]
end
args.pop
end
seq = send_method_request(method, name, args, synchronous = sync)
if seq
return seq unless sync
unless @broker.wait_for_sync_done(timeout)
@session.seq_mgr.release(seq)
raise "Timed out waiting for method to respond"
end
if @broker.error
error_text = @broker.error
@broker.error = nil
raise error_text
end
return @broker.sync_result
end
raise "Invalid Method (software defect) [#{name}]"
end
def parse_presence_masks(codec, schema)
exclude_list = []
bit = 0
schema.properties.each do |property|
if property.optional
if bit == 0
mask = codec.read_uint8
bit = 1
end
if (mask & bit) == 0
exclude_list << property.name
end
bit *= 2
bit = 0 if bit == 256
end
end
return exclude_list
end
end
class MethodResult
attr_reader :status, :text, :out_args
def initialize(status, text, out_args)
@status = status
@text = text
@out_args = out_args
end
def method_missing(name)
name = name.to_s()
if @out_args.include?(name)
return @out_args[name]
else
raise "Unknown method result arg #{name}"
end
end
def to_s
argsString = ""
padding = ""
out_args.each do |key,value|
argsString += padding
padding = " " if padding == ""
argsString += key.to_s
argsString += " => "
argsString += value.to_s()
end
"MethodResult(Msg: '#{text}' Status: #{status} Return: [#{argsString}])"
end
end
class ManagedConnection
DELAY_MIN = 1
DELAY_MAX = 128
DELAY_FACTOR = 2
include MonitorMixin
def initialize(broker)
super()
@broker = broker
@cv = new_cond
@is_cancelled = false
end
# Main body of the running thread.
def start
@thread = Thread.new {
delay = DELAY_MIN
while true
begin
@broker.try_to_connect
synchronize do
while !@is_cancelled and @broker.connected?
@cv.wait
Thread.exit if @is_cancelled
delay = DELAY_MIN
end
end
rescue
delay *= DELAY_FACTOR if delay < DELAY_MAX
end
synchronize do
@cv.wait(delay)
Thread.exit if @is_cancelled
end
end
}
end
# Tell this thread to stop running and return.
def stop
synchronize do
@is_cancelled = true
@cv.signal
end
end
# Notify the thread that the connection was lost.
def disconnected
synchronize do
@cv.signal
end
end
def join
@thread.join
end
end
class Broker
SYNC_TIME = 60
@@next_seq = 1
include MonitorMixin
attr_accessor :error
attr_reader :amqp_session_id, :amqp_session, :conn, :broker_bank, :topic_name
attr_accessor :broker_id, :sync_result
def initialize(session, host, port, auth_name, auth_pass, kwargs)
super()
# For debugging..
Thread.abort_on_exception = true
@session = session
@host = host
@port = port
@auth_name = auth_name
@auth_pass = auth_pass
@user_id = nil
@auth_mechanism = kwargs[:mechanism]
@auth_service = kwargs[:service]
@broker_bank = 1
@topic_bound = false
@cv = new_cond
@error = nil
@broker_id = nil
@is_connected = false
@amqp_session_id = "%s.%d.%d" % [Socket.gethostname, Process::pid, @@next_seq]
@@next_seq += 1
@conn = nil
if @session.managedConnections?
@thread = ManagedConnection.new(self)
@thread.start
else
@thread = nil
try_to_connect
end
end
def connected?
@is_connected
end
def agent(broker_bank, agent_bank)
bank_key = "%d.%d" % [broker_bank, agent_bank]
return @agents[bank_key]
end
# Get the list of agents reachable via this broker
def agents
@agents.values
end
def url
"#{@host}:#{@port}"
end
def to_s
if connected?
"Broker connected at: #{url}"
else
"Disconnected Broker"
end
end
def wait_for_sync_done(timeout=nil)
wait_time = timeout ? timeout : SYNC_TIME
synchronize do
return @cv.wait_for(wait_time) { ! @sync_in_flight || @error }
end
end
def wait_for_stable
synchronize do
return unless connected?
return if @reqs_outstanding == 0
@sync_in_flight = true
unless @cv.wait_for(SYNC_TIME) { @reqs_outstanding == 0 }
raise "Timed out waiting for broker to synchronize"
end
end
end
# Compose the header of a management message
def set_header(codec, opcode, seq=0)
codec.write_uint8(?A)
codec.write_uint8(?M)
codec.write_uint8(?2)
codec.write_uint8(opcode)
codec.write_uint32(seq)
end
def message(body, routing_key="broker", ttl=nil)
dp = @amqp_session.delivery_properties
dp.routing_key = routing_key
dp.ttl = ttl if ttl
mp = @amqp_session.message_properties
mp.content_type = "x-application/qmf"
mp.reply_to = amqp_session.reply_to("amq.direct", @reply_name)
#mp.user_id = @user_id if @user_id
return Qpid::Message.new(dp, mp, body)
end
def emit(msg, dest="qpid.management")
@amqp_session.message_transfer(:destination => dest,
:message => msg)
end
def inc_outstanding
synchronize { @reqs_outstanding += 1 }
end
def dec_outstanding
synchronize do
@reqs_outstanding -= 1
if @reqs_outstanding == 0 && ! @topic_bound
@topic_bound = true
@session.binding_key_list.each do |key|
args = {
:exchange => "qpid.management",
:queue => @topic_name,
:binding_key => key }
@amqp_session.exchange_bind(args)
end
end
if @reqs_outstanding == 0 && @sync_in_flight
sync_done
end
end
end
def sync_start
synchronize { @sync_in_flight = true }
end
def sync_done
synchronize do
@sync_in_flight = false
@cv.signal
end
end
def update_agent(obj)
bank_key = "%d.%d" % [obj.brokerBank, obj.agentBank]
if obj.delete_time == 0
unless @agents.include?(bank_key)
agent = Agent.new(self, obj.agentBank, obj.label)
@agents[bank_key] = agent
@session.console.new_agent(agent) if @session.console
end
else
agent = @agents.delete(bank_key)
@session.console.del_agent(agent) if agent && @session.console
end
end
def shutdown
if @thread
@thread.stop
@thread.join
end
if connected?
@amqp_session.incoming("rdest").stop
if @session.console
@amqp_session.incoming("tdest").stop
end
@amqp_session.close
@is_connected = false
end
end
def try_to_connect
@agents = {}
@agents["1.0"] = Agent.new(self, 0, "BrokerAgent")
@topic_bound = false
@sync_in_flight = false
@sync_request = 0
@sync_result = nil
@reqs_outstanding = 1
# FIXME: Need sth for Qpid::Util::connect
@conn = Qpid::Connection.new(TCPSocket.new(@host, @port),
:mechanism => @auth_mechanism,
:username => @auth_name,
:password => @auth_pass,
:host => @host,
:service => @auth_service)
@conn.start
@user_id = @conn.user_id
@reply_name = "reply-%s" % amqp_session_id
@amqp_session = @conn.session(@amqp_session_id)
@amqp_session.auto_sync = true
@amqp_session.queue_declare(:queue => @reply_name,
:exclusive => true,
:auto_delete => true)
@amqp_session.exchange_bind(:exchange => "amq.direct",
:queue => @reply_name,
:binding_key => @reply_name)
@amqp_session.message_subscribe(:queue => @reply_name,
:destination => "rdest",
:accept_mode => @amqp_session.message_accept_mode.none,
:acquire_mode => @amqp_session.message_acquire_mode.pre_acquired)
q = @amqp_session.incoming("rdest")
q.exc_listen(& method(:exception_cb))
q.listen(& method(:reply_cb))
@amqp_session.message_set_flow_mode(:destination => "rdest",
:flow_mode => 1)
@amqp_session.message_flow(:destination => "rdest",
:unit => 0,
:value => 0xFFFFFFFF)
@amqp_session.message_flow(:destination => "rdest",
:unit => 1,
:value => 0xFFFFFFFF)
@topic_name = "topic-#{@amqp_session_id}"
@amqp_session.queue_declare(:queue => @topic_name,
:exclusive => true,
:auto_delete => true)
@amqp_session.message_subscribe(:queue => @topic_name,
:destination => "tdest",
:accept_mode => @amqp_session.message_accept_mode.none,
:acquire_mode => @amqp_session.message_acquire_mode.pre_acquired)
@amqp_session.incoming("tdest").listen(& method(:reply_cb))
@amqp_session.message_set_flow_mode(:destination => "tdest",
:flow_mode => 1)
@amqp_session.message_flow(:destination => "tdest",
:unit => 0,
:value => 0xFFFFFFFF)
@amqp_session.message_flow(:destination => "tdest",
:unit => 1,
:value => 0xFFFFFFFF)
@is_connected = true
@session.handle_broker_connect(self)
codec = Qpid::StringCodec.new(@conn.spec)
set_header(codec, ?B)
msg = message(codec.encoded)
emit(msg)
end
private
# Check the header of a management message and extract the opcode and
# class
def check_header(codec)
begin
return [nil, nil] unless codec.read_uint8 == ?A
return [nil, nil] unless codec.read_uint8 == ?M
return [nil, nil] unless codec.read_uint8 == ?2
opcode = codec.read_uint8
seq = codec.read_uint32
return [opcode, seq]
rescue
return [nil, nil]
end
end
def reply_cb(msg)
codec = Qpid::StringCodec.new(@conn.spec, msg.body)
loop do
opcode, seq = check_header(codec)
return unless opcode
case opcode
when ?b: @session.handle_broker_resp(self, codec, seq)
when ?p: @session.handle_package_ind(self, codec, seq)
when ?z: @session.handle_command_complete(self, codec, seq)
when ?q: @session.handle_class_ind(self, codec, seq)
when ?m: @session.handle_method_resp(self, codec, seq)
when ?h: @session.handle_heartbeat_ind(self, codec, seq, msg)
when ?e: @session.handle_event_ind(self, codec, seq)
when ?s: @session.handle_schema_resp(self, codec, seq)
when ?c: @session.handle_content_ind(self, codec, seq, true, false)
when ?i: @session.handle_content_ind(self, codec, seq, false, true)
when ?g: @session.handle_content_ind(self, codec, seq, true, true)
else
raise "Unexpected opcode #{opcode.inspect}"
end
end
end
def exception_cb(data)
@is_connected = false
@error = data
synchronize { @cv.signal if @sync_in_flight }
@session.handle_error(@error)
@session.handle_broker_disconnect(self)
@thread.disconnected if @thread
end
end
class Agent
attr_reader :broker, :agent_bank, :label
def initialize(broker, agent_bank, label)
@broker = broker
@agent_bank = agent_bank
@label = label
end
def broker_bank
@broker.broker_bank
end
def to_s
"Agent at bank %d.%d (%s)" % [@broker.broker_bank, @agent_bank, @label]
end
end
class Event
attr_reader :klass_key, :arguments, :timestamp, :name, :schema
def initialize(session, broker, codec)
@session = session
@broker = broker
@klass_key = ClassKey.new(codec)
@timestamp = codec.read_int64
@severity = codec.read_uint8
@schema = nil
pname, cname, hash = @klass_key.to_a()
session.packages.keys.each do |pname|
k = [cname, hash]
if session.packages[pname].include?(k)
@schema = session.packages[pname][k]
@arguments = {}
@schema.arguments.each do |arg|
v = session.decode_value(codec, arg.type)
@arguments[arg.name] = v
end
end
end
end
def to_s
return "<uninterpretable>" unless @schema
t = Time.at(self.timestamp / 1000000000)
out = t.strftime("%c")
out += " " + sev_name + " " + @klass_key.package + ":" + @klass_key.klass_name
out += " broker=" + @broker.url
@schema.arguments.each do |arg|
out += " " + arg.name + "=" + @session.display_value(@arguments[arg.name], arg.type)
end
return out
end
def sev_name
case @severity
when 0 : return "EMER "
when 1 : return "ALERT"
when 2 : return "CRIT "
when 3 : return "ERROR"
when 4 : return "WARN "
when 5 : return "NOTIC"
when 6 : return "INFO "
when 7 : return "DEBUG"
else
return "INV-%d" % @severity
end
end
end
# Manage sequence numbers for asynchronous method calls
class SequenceManager
include MonitorMixin
def initialize
super()
@sequence = 0
@pending = {}
end
# Reserve a unique sequence number
def reserve (data)
synchronize do
result = @sequence
@sequence += 1
@pending[result] = data
return result
end
end
# Release a reserved sequence number
def release (seq)
synchronize { @pending.delete(seq) }
end
end
class DebugConsole < Console
def broker_connected(broker)
puts "brokerConnected #{broker}"
end
def broker_disconnected(broker)
puts "brokerDisconnected #{broker}"
end
def new_package(name)
puts "newPackage #{name}"
end
def new_class(kind, klass_key)
puts "newClass #{kind} #{klass_key}"
end
def new_agent(agent)
puts "new_agent #{agent}"
end
def del_agent(agent)
puts "delAgent #{agent}"
end
def object_props(broker, record)
puts "objectProps #{record}"
end
def object_stats(broker, record)
puts "objectStats #{record}"
end
def event(broker, event)
puts "event #{event}"
end
def heartbeat(agent, timestamp)
puts "heartbeat #{agent}"
end
def broker_info(broker)
puts "brokerInfo #{broker}"
end
end
module XML
TYPES = {
1 => "uint8",
2 => "uint16",
3 => "uint32",
4 => "uint64",
5 => "bool",
6 => "short-stirng",
7 => "long-string",
8 => "abs-time",
9 => "delta-time",
10 => "reference",
11 => "boolean",
12 => "float",
13 => "double",
14 => "uuid",
15 => "field-table",
16 => "int8",
17 => "int16",
18 => "int32",
19 => "int64",
20 => "object",
21 => "list",
22 => "array"
}
ACCESS_MODES = {
1 => "RC",
2 => "RW",
3 => "RO"
}
def common_attributes(item)
attr_string = ""
attr_string << " desc='#{item.desc}'" if item.desc
attr_string << " desc='#{item.desc}'" if item.desc
attr_string << " refPackage='#{item.refPackage}'" if item.refPackage
attr_string << " refClass='#{item.refClass}'" if item.refClass
attr_string << " unit='#{item.unit}'" if item.unit
attr_string << " min='#{item.min}'" if item.min
attr_string << " max='#{item.max}'" if item.max
attr_string << " maxlen='#{item.maxlen}'" if item.maxlen
return attr_string
end
module_function :common_attributes
def schema_xml(session, *packages)
schema = "<schemas>\n"
packages.each do |package|
schema << "\t<schema package='#{package}'>\n"
session.classes(package).each do |klass_key|
klass = session.schema(klass_key)
if klass.is_table?
if klass.super_klass_key
schema << "\t\t<class name='#{klass.klass_key.klass_name}' hash='#{klass.klass_key.hash_string}' extends='#{klass.super_klass_key.to_s}'>\n"
else
schema << "\t\t<class name='#{klass.klass_key.klass_name}' hash='#{klass.klass_key.hash_string}'>\n"
end
klass.properties(false).each do |property|
schema << "\t\t\t<property name='#{property.name}' type='#{TYPES[property.type]}' access='#{ACCESS_MODES[property.access]}' optional='#{property.optional ? "True" : "False"}'#{common_attributes(property)}/>\n"
end
klass.methods(false).each do |method|
schema << "\t\t\t<method name='#{method.name}'>\n"
method.arguments.each do |arg|
schema << "\t\t\t\t<arg name='#{arg.name}' dir='#{arg.dir}' type='#{TYPES[arg.type]}'#{common_attributes(arg)}/>\n"
end
schema << "\t\t\t</method>\n"
end
schema << "\t\t</class>\n"
else
schema << "\t\t<event name='#{klass.klass_key.klass_name}' hash='#{klass.klass_key.hash_string}'>\n"
klass.arguments.each do |arg|
schema << "\t\t\t<arg name='#{arg.name}'type='#{TYPES[arg.type]}'#{common_attributes(arg)}/>\n"
end
schema << "\t\t</event>\n"
end
end
schema << "\t</package>\n"
end
schema << "</schema>"
end
module_function :schema_xml
end
end
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