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# Copyright 2015, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
require 'grpc'
require 'timeout'
include Timeout
include GRPC::Core
# A test message
class EchoMsg
def self.marshal(_o)
''
end
def self.unmarshal(_o)
EchoMsg.new
end
end
# A test service with an echo implementation.
class EchoService
include GRPC::GenericService
rpc :an_rpc, EchoMsg, EchoMsg
attr_reader :received_md
def initialize(**kw)
@trailing_metadata = kw
@received_md = []
end
def an_rpc(req, call)
GRPC.logger.info('echo service received a request')
call.output_metadata.update(@trailing_metadata)
@received_md << call.metadata unless call.metadata.nil?
req
end
end
EchoStub = EchoService.rpc_stub_class
def start_server(port = 0)
@srv = GRPC::RpcServer.new(pool_size: 1)
server_port = @srv.add_http2_port("localhost:#{port}", :this_port_is_insecure)
@srv.handle(EchoService)
@server_thd = Thread.new { @srv.run }
@srv.wait_till_running
server_port
end
def stop_server
expect(@srv.stopped?).to be(false)
@srv.stop
@server_thd.join
expect(@srv.stopped?).to be(true)
end
describe 'channel connection behavior' do
it 'the client channel handles temporary loss of a transport' do
port = start_server
stub = EchoStub.new("localhost:#{port}", :this_channel_is_insecure)
req = EchoMsg.new
expect(stub.an_rpc(req)).to be_a(EchoMsg)
stop_server
sleep 1
# TODO(apolcyn) grabbing the same port might fail, is this stable enough?
start_server(port)
expect(stub.an_rpc(req)).to be_a(EchoMsg)
stop_server
end
it 'observably connects and reconnects to transient server' \
' when using the channel state API' do
port = start_server
ch = GRPC::Core::Channel.new("localhost:#{port}", {},
:this_channel_is_insecure)
expect(ch.connectivity_state).to be(GRPC::Core::ConnectivityStates::IDLE)
state = ch.connectivity_state(true)
count = 0
while count < 20 && state != GRPC::Core::ConnectivityStates::READY
ch.watch_connectivity_state(state, Time.now + 60)
state = ch.connectivity_state(true)
count += 1
end
expect(state).to be(GRPC::Core::ConnectivityStates::READY)
stop_server
state = ch.connectivity_state
count = 0
while count < 20 && state == GRPC::Core::ConnectivityStates::READY
ch.watch_connectivity_state(state, Time.now + 60)
state = ch.connectivity_state
count += 1
end
expect(state).to_not be(GRPC::Core::ConnectivityStates::READY)
start_server(port)
state = ch.connectivity_state(true)
count = 0
while count < 20 && state != GRPC::Core::ConnectivityStates::READY
ch.watch_connectivity_state(state, Time.now + 60)
state = ch.connectivity_state(true)
count += 1
end
expect(state).to be(GRPC::Core::ConnectivityStates::READY)
stop_server
end
it 'concurrent watches on the same channel' do
timeout(180) do
port = start_server
ch = GRPC::Core::Channel.new("localhost:#{port}", {},
:this_channel_is_insecure)
stop_server
thds = []
50.times do
thds << Thread.new do
while ch.connectivity_state(true) != ConnectivityStates::READY
ch.watch_connectivity_state(
ConnectivityStates::READY, Time.now + 60)
break
end
end
end
sleep 0.01
start_server(port)
thds.each(&:join)
stop_server
end
end
end
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