# Copyright 2016 gRPC authors.
#
# Licensed 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.

# performance scenario configuration for various languages

import math

WARMUP_SECONDS = 5
JAVA_WARMUP_SECONDS = 15  # Java needs more warmup time for JIT to kick in.
BENCHMARK_SECONDS = 30

SMOKETEST = 'smoketest'
SCALABLE = 'scalable'
INPROC = 'inproc'
SWEEP = 'sweep'
DEFAULT_CATEGORIES = (SCALABLE, SMOKETEST)

SECURE_SECARGS = {
    'use_test_ca': True,
    'server_host_override': 'foo.test.google.fr'
}

HISTOGRAM_PARAMS = {
    'resolution': 0.01,
    'max_possible': 60e9,
}

# target number of RPCs outstanding on across all client channels in
# non-ping-pong tests (since we can only specify per-channel numbers, the
# actual target will be slightly higher)
OUTSTANDING_REQUESTS = {'async': 6400, 'async-limited': 800, 'sync': 1000}

# wide is the number of client channels in multi-channel tests (1 otherwise)
WIDE = 64


def _get_secargs(is_secure):
    if is_secure:
        return SECURE_SECARGS
    else:
        return None


def remove_nonproto_fields(scenario):
    """Removes special-purpose fields that don't belong in the protobuf.

    This function removes additional information about the scenario that is not
    included in the ScenarioConfig protobuf message.
    """
    scenario.pop('CATEGORIES', None)
    scenario.pop('CLIENT_LANGUAGE', None)
    scenario.pop('SERVER_LANGUAGE', None)
    scenario.pop('EXCLUDED_POLL_ENGINES', None)
    return scenario


def geometric_progression(start, stop, step):
    n = start
    while n < stop:
        yield int(round(n))
        n *= step


def _payload_type(use_generic_payload, req_size, resp_size):
    r = {}
    sizes = {
        'req_size': req_size,
        'resp_size': resp_size,
    }
    if use_generic_payload:
        r['bytebuf_params'] = sizes
    else:
        r['simple_params'] = sizes
    return r


def _load_params(offered_load):
    r = {}
    if offered_load is None:
        r['closed_loop'] = {}
    else:
        load = {}
        load['offered_load'] = offered_load
        r['poisson'] = load
    return r


def _add_channel_arg(config, key, value):
    if 'channel_args' in config:
        channel_args = config['channel_args']
    else:
        channel_args = []
        config['channel_args'] = channel_args
    arg = {'name': key}
    if isinstance(value, int):
        arg['int_value'] = value
    else:
        arg['str_value'] = value
    channel_args.append(arg)


def _ping_pong_scenario(name,
                        rpc_type,
                        client_type,
                        server_type,
                        secure=True,
                        use_generic_payload=False,
                        req_size=0,
                        resp_size=0,
                        unconstrained_client=None,
                        client_language=None,
                        server_language=None,
                        async_server_threads=0,
                        client_processes=0,
                        server_processes=0,
                        server_threads_per_cq=0,
                        client_threads_per_cq=0,
                        warmup_seconds=WARMUP_SECONDS,
                        categories=None,
                        channels=None,
                        outstanding=None,
                        num_clients=None,
                        resource_quota_size=None,
                        messages_per_stream=None,
                        excluded_poll_engines=None,
                        minimal_stack=False,
                        offered_load=None):
    """Creates a basic ping pong scenario."""
    scenario = {
        'name': name,
        'num_servers': 1,
        'num_clients': 1,
        'client_config': {
            'client_type': client_type,
            'security_params': _get_secargs(secure),
            'outstanding_rpcs_per_channel': 1,
            'client_channels': 1,
            'async_client_threads': 1,
            'client_processes': client_processes,
            'threads_per_cq': client_threads_per_cq,
            'rpc_type': rpc_type,
            'histogram_params': HISTOGRAM_PARAMS,
            'channel_args': [],
        },
        'server_config': {
            'server_type': server_type,
            'security_params': _get_secargs(secure),
            'async_server_threads': async_server_threads,
            'server_processes': server_processes,
            'threads_per_cq': server_threads_per_cq,
            'channel_args': [],
        },
        'warmup_seconds': warmup_seconds,
        'benchmark_seconds': BENCHMARK_SECONDS,
        'CATEGORIES': list(DEFAULT_CATEGORIES),
        'EXCLUDED_POLL_ENGINES': [],
    }
    if resource_quota_size:
        scenario['server_config']['resource_quota_size'] = resource_quota_size
    if use_generic_payload:
        if server_type != 'ASYNC_GENERIC_SERVER':
            raise Exception('Use ASYNC_GENERIC_SERVER for generic payload.')
        scenario['server_config']['payload_config'] = _payload_type(
            use_generic_payload, req_size, resp_size)

    scenario['client_config']['payload_config'] = _payload_type(
        use_generic_payload, req_size, resp_size)

    # Optimization target of 'throughput' does not work well with epoll1 polling
    # engine. Use the default value of 'blend'
    optimization_target = 'throughput'

    if unconstrained_client:
        outstanding_calls = outstanding if outstanding is not None else OUTSTANDING_REQUESTS[
            unconstrained_client]
        # clamp buffer usage to something reasonable (16 gig for now)
        MAX_MEMORY_USE = 16 * 1024 * 1024 * 1024
        if outstanding_calls * max(req_size, resp_size) > MAX_MEMORY_USE:
            outstanding_calls = max(1,
                                    MAX_MEMORY_USE / max(req_size, resp_size))
        wide = channels if channels is not None else WIDE
        deep = int(math.ceil(1.0 * outstanding_calls / wide))

        scenario[
            'num_clients'] = num_clients if num_clients is not None else 0  # use as many clients as available.
        scenario['client_config']['outstanding_rpcs_per_channel'] = deep
        scenario['client_config']['client_channels'] = wide
        scenario['client_config']['async_client_threads'] = 0
        if offered_load is not None:
            optimization_target = 'latency'
    else:
        scenario['client_config']['outstanding_rpcs_per_channel'] = 1
        scenario['client_config']['client_channels'] = 1
        scenario['client_config']['async_client_threads'] = 1
        optimization_target = 'latency'

    scenario['client_config']['load_params'] = _load_params(offered_load)

    optimization_channel_arg = {
        'name': 'grpc.optimization_target',
        'str_value': optimization_target
    }
    scenario['client_config']['channel_args'].append(optimization_channel_arg)
    scenario['server_config']['channel_args'].append(optimization_channel_arg)

    if minimal_stack:
        _add_channel_arg(scenario['client_config'], 'grpc.minimal_stack', 1)
        _add_channel_arg(scenario['server_config'], 'grpc.minimal_stack', 1)

    if messages_per_stream:
        scenario['client_config']['messages_per_stream'] = messages_per_stream
    if client_language:
        # the CLIENT_LANGUAGE field is recognized by run_performance_tests.py
        scenario['CLIENT_LANGUAGE'] = client_language
    if server_language:
        # the SERVER_LANGUAGE field is recognized by run_performance_tests.py
        scenario['SERVER_LANGUAGE'] = server_language
    if categories:
        scenario['CATEGORIES'] = categories
    if excluded_poll_engines:
        # The polling engines for which this scenario is excluded
        scenario['EXCLUDED_POLL_ENGINES'] = excluded_poll_engines
    return scenario


class Language(object):

    @property
    def safename(self):
        return str(self)


class CXXLanguage(Language):

    @property
    def safename(self):
        return 'cxx'

    def worker_cmdline(self):
        return ['cmake/build/qps_worker']

    def worker_port_offset(self):
        return 0

    def scenarios(self):
        # TODO(ctiller): add 70% load latency test
        yield _ping_pong_scenario(
            'cpp_protobuf_async_unary_1channel_100rpcs_1MB',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            req_size=1024 * 1024,
            resp_size=1024 * 1024,
            unconstrained_client='async',
            outstanding=100,
            channels=1,
            num_clients=1,
            secure=False,
            categories=[SWEEP])

        yield _ping_pong_scenario(
            'cpp_protobuf_async_streaming_from_client_1channel_1MB',
            rpc_type='STREAMING_FROM_CLIENT',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            req_size=1024 * 1024,
            resp_size=1024 * 1024,
            unconstrained_client='async',
            outstanding=1,
            channels=1,
            num_clients=1,
            secure=False,
            categories=[SWEEP])

        # Scenario was added in https://github.com/grpc/grpc/pull/12987, but its purpose is unclear
        # (beyond excercising some params that other scenarios don't)
        yield _ping_pong_scenario(
            'cpp_protobuf_async_unary_75Kqps_600channel_60Krpcs_300Breq_50Bresp',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            req_size=300,
            resp_size=50,
            unconstrained_client='async',
            outstanding=30000,
            channels=300,
            offered_load=37500,
            secure=False,
            async_server_threads=16,
            server_threads_per_cq=1,
            categories=[SCALABLE])

        for secure in [True, False]:
            secstr = 'secure' if secure else 'insecure'
            smoketest_categories = ([SMOKETEST] if secure else [])
            inproc_categories = ([INPROC] if not secure else [])

            yield _ping_pong_scenario(
                'cpp_generic_async_streaming_ping_pong_%s' % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                use_generic_payload=True,
                async_server_threads=1,
                secure=secure,
                categories=smoketest_categories + inproc_categories +
                [SCALABLE])

            yield _ping_pong_scenario(
                'cpp_generic_async_streaming_qps_unconstrained_%s' % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                unconstrained_client='async',
                use_generic_payload=True,
                secure=secure,
                client_threads_per_cq=2,
                server_threads_per_cq=2,
                minimal_stack=not secure,
                categories=smoketest_categories + inproc_categories +
                [SCALABLE])

            for mps in geometric_progression(10, 20, 10):
                yield _ping_pong_scenario(
                    'cpp_generic_async_streaming_qps_unconstrained_%smps_%s' %
                    (mps, secstr),
                    rpc_type='STREAMING',
                    client_type='ASYNC_CLIENT',
                    server_type='ASYNC_GENERIC_SERVER',
                    unconstrained_client='async',
                    use_generic_payload=True,
                    secure=secure,
                    messages_per_stream=mps,
                    minimal_stack=not secure,
                    categories=smoketest_categories + inproc_categories +
                    [SCALABLE])

            for mps in geometric_progression(1, 200, math.sqrt(10)):
                yield _ping_pong_scenario(
                    'cpp_generic_async_streaming_qps_unconstrained_%smps_%s' %
                    (mps, secstr),
                    rpc_type='STREAMING',
                    client_type='ASYNC_CLIENT',
                    server_type='ASYNC_GENERIC_SERVER',
                    unconstrained_client='async',
                    use_generic_payload=True,
                    secure=secure,
                    messages_per_stream=mps,
                    minimal_stack=not secure,
                    categories=[SWEEP])

            yield _ping_pong_scenario(
                'cpp_generic_async_streaming_qps_1channel_1MBmsg_%s' % secstr,
                rpc_type='STREAMING',
                req_size=1024 * 1024,
                resp_size=1024 * 1024,
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                unconstrained_client='async',
                use_generic_payload=True,
                secure=secure,
                minimal_stack=not secure,
                categories=inproc_categories + [SCALABLE],
                channels=1,
                outstanding=100)

            yield _ping_pong_scenario(
                'cpp_generic_async_streaming_qps_unconstrained_64KBmsg_%s' %
                secstr,
                rpc_type='STREAMING',
                req_size=64 * 1024,
                resp_size=64 * 1024,
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                unconstrained_client='async',
                use_generic_payload=True,
                secure=secure,
                minimal_stack=not secure,
                categories=inproc_categories + [SCALABLE])

            yield _ping_pong_scenario(
                'cpp_generic_async_streaming_qps_unconstrained_1cq_%s' % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                unconstrained_client='async-limited',
                use_generic_payload=True,
                secure=secure,
                client_threads_per_cq=1000000,
                server_threads_per_cq=1000000,
                categories=[SWEEP])

            yield _ping_pong_scenario(
                'cpp_protobuf_async_streaming_qps_unconstrained_1cq_%s' %
                secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                unconstrained_client='async-limited',
                secure=secure,
                client_threads_per_cq=1000000,
                server_threads_per_cq=1000000,
                categories=inproc_categories + [SCALABLE])

            yield _ping_pong_scenario(
                'cpp_protobuf_async_unary_qps_unconstrained_1cq_%s' % secstr,
                rpc_type='UNARY',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                unconstrained_client='async-limited',
                secure=secure,
                client_threads_per_cq=1000000,
                server_threads_per_cq=1000000,
                categories=inproc_categories + [SCALABLE])

            yield _ping_pong_scenario(
                'cpp_generic_async_streaming_qps_one_server_core_%s' % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                unconstrained_client='async-limited',
                use_generic_payload=True,
                async_server_threads=1,
                minimal_stack=not secure,
                secure=secure,
                categories=[SWEEP])

            yield _ping_pong_scenario(
                'cpp_protobuf_async_client_sync_server_unary_qps_unconstrained_%s'
                % (secstr),
                rpc_type='UNARY',
                client_type='ASYNC_CLIENT',
                server_type='SYNC_SERVER',
                unconstrained_client='async',
                secure=secure,
                minimal_stack=not secure,
                categories=smoketest_categories + inproc_categories +
                [SCALABLE])

            yield _ping_pong_scenario(
                'cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_%s'
                % (secstr),
                rpc_type='UNARY',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                channels=1,
                outstanding=64,
                req_size=128,
                resp_size=8 * 1024 * 1024,
                secure=secure,
                minimal_stack=not secure,
                categories=inproc_categories + [SCALABLE])

            yield _ping_pong_scenario(
                'cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_%s'
                % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='SYNC_SERVER',
                unconstrained_client='async',
                secure=secure,
                minimal_stack=not secure,
                categories=[SWEEP])

            yield _ping_pong_scenario(
                'cpp_protobuf_async_unary_ping_pong_%s_1MB' % secstr,
                rpc_type='UNARY',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                req_size=1024 * 1024,
                resp_size=1024 * 1024,
                secure=secure,
                minimal_stack=not secure,
                categories=smoketest_categories + inproc_categories +
                [SCALABLE])

            for rpc_type in [
                    'unary', 'streaming', 'streaming_from_client',
                    'streaming_from_server'
            ]:
                for synchronicity in ['sync', 'async']:
                    yield _ping_pong_scenario(
                        'cpp_protobuf_%s_%s_ping_pong_%s' %
                        (synchronicity, rpc_type, secstr),
                        rpc_type=rpc_type.upper(),
                        client_type='%s_CLIENT' % synchronicity.upper(),
                        server_type='%s_SERVER' % synchronicity.upper(),
                        async_server_threads=1,
                        minimal_stack=not secure,
                        secure=secure)

                    for size in geometric_progression(1, 1024 * 1024 * 1024 + 1,
                                                      8):
                        yield _ping_pong_scenario(
                            'cpp_protobuf_%s_%s_qps_unconstrained_%s_%db' %
                            (synchronicity, rpc_type, secstr, size),
                            rpc_type=rpc_type.upper(),
                            req_size=size,
                            resp_size=size,
                            client_type='%s_CLIENT' % synchronicity.upper(),
                            server_type='%s_SERVER' % synchronicity.upper(),
                            unconstrained_client=synchronicity,
                            secure=secure,
                            minimal_stack=not secure,
                            categories=[SWEEP])

                    maybe_scalable = [SCALABLE]
                    if rpc_type == 'streaming_from_server' and synchronicity == 'async' and secure:
                        # protobuf_async_streaming_from_server_qps_unconstrained_secure is very flaky
                        # and has extremely high variance so running it isn't really useful.
                        # see b/198275705
                        maybe_scalable = [SWEEP]

                    yield _ping_pong_scenario(
                        'cpp_protobuf_%s_%s_qps_unconstrained_%s' %
                        (synchronicity, rpc_type, secstr),
                        rpc_type=rpc_type.upper(),
                        client_type='%s_CLIENT' % synchronicity.upper(),
                        server_type='%s_SERVER' % synchronicity.upper(),
                        unconstrained_client=synchronicity,
                        secure=secure,
                        minimal_stack=not secure,
                        server_threads_per_cq=2,
                        client_threads_per_cq=2,
                        categories=inproc_categories + maybe_scalable)

                    # TODO(vjpai): Re-enable this test. It has a lot of timeouts
                    # and hasn't yet been conclusively identified as a test failure
                    # or race in the library
                    # yield _ping_pong_scenario(
                    #     'cpp_protobuf_%s_%s_qps_unconstrained_%s_500kib_resource_quota' % (synchronicity, rpc_type, secstr),
                    #     rpc_type=rpc_type.upper(),
                    #     client_type='%s_CLIENT' % synchronicity.upper(),
                    #     server_type='%s_SERVER' % synchronicity.upper(),
                    #     unconstrained_client=synchronicity,
                    #     secure=secure,
                    #     categories=smoketest_categories+[SCALABLE],
                    #     resource_quota_size=500*1024)

                    if rpc_type == 'streaming':
                        for mps in geometric_progression(10, 20, 10):
                            yield _ping_pong_scenario(
                                'cpp_protobuf_%s_%s_qps_unconstrained_%smps_%s'
                                % (synchronicity, rpc_type, mps, secstr),
                                rpc_type=rpc_type.upper(),
                                client_type='%s_CLIENT' % synchronicity.upper(),
                                server_type='%s_SERVER' % synchronicity.upper(),
                                unconstrained_client=synchronicity,
                                secure=secure,
                                messages_per_stream=mps,
                                minimal_stack=not secure,
                                categories=inproc_categories + [SCALABLE])

                        for mps in geometric_progression(1, 200, math.sqrt(10)):
                            yield _ping_pong_scenario(
                                'cpp_protobuf_%s_%s_qps_unconstrained_%smps_%s'
                                % (synchronicity, rpc_type, mps, secstr),
                                rpc_type=rpc_type.upper(),
                                client_type='%s_CLIENT' % synchronicity.upper(),
                                server_type='%s_SERVER' % synchronicity.upper(),
                                unconstrained_client=synchronicity,
                                secure=secure,
                                messages_per_stream=mps,
                                minimal_stack=not secure,
                                categories=[SWEEP])

                    for channels in geometric_progression(
                            1, 20000, math.sqrt(10)):
                        for outstanding in geometric_progression(
                                1, 200000, math.sqrt(10)):
                            if synchronicity == 'sync' and outstanding > 1200:
                                continue
                            if outstanding < channels:
                                continue
                            yield _ping_pong_scenario(
                                'cpp_protobuf_%s_%s_qps_unconstrained_%s_%d_channels_%d_outstanding'
                                % (synchronicity, rpc_type, secstr, channels,
                                   outstanding),
                                rpc_type=rpc_type.upper(),
                                client_type='%s_CLIENT' % synchronicity.upper(),
                                server_type='%s_SERVER' % synchronicity.upper(),
                                unconstrained_client=synchronicity,
                                secure=secure,
                                minimal_stack=not secure,
                                categories=[SWEEP],
                                channels=channels,
                                outstanding=outstanding)

    def __str__(self):
        return 'c++'


class CSharpLanguage(Language):
    """The legacy Grpc.Core implementation from grpc/grpc."""

    def worker_cmdline(self):
        return ['tools/run_tests/performance/run_worker_csharp.sh']

    def worker_port_offset(self):
        return 100

    def scenarios(self):
        yield _ping_pong_scenario('csharp_generic_async_streaming_ping_pong',
                                  rpc_type='STREAMING',
                                  client_type='ASYNC_CLIENT',
                                  server_type='ASYNC_GENERIC_SERVER',
                                  use_generic_payload=True,
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'csharp_generic_async_streaming_ping_pong_insecure_1MB',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_GENERIC_SERVER',
            req_size=1024 * 1024,
            resp_size=1024 * 1024,
            use_generic_payload=True,
            secure=False,
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'csharp_generic_async_streaming_qps_unconstrained_insecure',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_GENERIC_SERVER',
            unconstrained_client='async',
            use_generic_payload=True,
            secure=False,
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario('csharp_protobuf_async_streaming_ping_pong',
                                  rpc_type='STREAMING',
                                  client_type='ASYNC_CLIENT',
                                  server_type='ASYNC_SERVER')

        yield _ping_pong_scenario('csharp_protobuf_async_unary_ping_pong',
                                  rpc_type='UNARY',
                                  client_type='ASYNC_CLIENT',
                                  server_type='ASYNC_SERVER',
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'csharp_protobuf_sync_to_async_unary_ping_pong',
            rpc_type='UNARY',
            client_type='SYNC_CLIENT',
            server_type='ASYNC_SERVER')

        yield _ping_pong_scenario(
            'csharp_protobuf_async_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='async',
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'csharp_protobuf_async_streaming_qps_unconstrained',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='async',
            categories=[SCALABLE])

        yield _ping_pong_scenario('csharp_to_cpp_protobuf_sync_unary_ping_pong',
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='SYNC_SERVER',
                                  server_language='c++',
                                  async_server_threads=1,
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'csharp_to_cpp_protobuf_async_streaming_ping_pong',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            server_language='c++',
            async_server_threads=1)

        yield _ping_pong_scenario(
            'csharp_to_cpp_protobuf_async_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='async',
            server_language='c++',
            categories=[SCALABLE])

        yield _ping_pong_scenario(
            'csharp_to_cpp_protobuf_sync_to_async_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='SYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='sync',
            server_language='c++',
            categories=[SCALABLE])

        yield _ping_pong_scenario(
            'cpp_to_csharp_protobuf_async_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='async',
            client_language='c++',
            categories=[SCALABLE])

        yield _ping_pong_scenario('csharp_protobuf_async_unary_ping_pong_1MB',
                                  rpc_type='UNARY',
                                  client_type='ASYNC_CLIENT',
                                  server_type='ASYNC_SERVER',
                                  req_size=1024 * 1024,
                                  resp_size=1024 * 1024,
                                  categories=[SMOKETEST, SCALABLE])

    def __str__(self):
        return 'csharp'


class DotnetLanguage(Language):
    """The pure C# implementation from grpc/grpc-dotnet."""

    def worker_cmdline(self):
        # grpc-dotnet worker is only supported by the new GKE based OSS benchmark
        # framework, and the worker_cmdline() is only used by run_performance_tests.py
        return ['grpc_dotnet_not_supported_by_legacy_performance_runner.sh']

    def worker_port_offset(self):
        return 1100

    def scenarios(self):
        yield _ping_pong_scenario('dotnet_generic_async_streaming_ping_pong',
                                  rpc_type='STREAMING',
                                  client_type='ASYNC_CLIENT',
                                  server_type='ASYNC_GENERIC_SERVER',
                                  use_generic_payload=True,
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'dotnet_generic_async_streaming_ping_pong_insecure_1MB',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_GENERIC_SERVER',
            req_size=1024 * 1024,
            resp_size=1024 * 1024,
            use_generic_payload=True,
            secure=False,
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'dotnet_generic_async_streaming_qps_unconstrained_insecure',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_GENERIC_SERVER',
            unconstrained_client='async',
            use_generic_payload=True,
            secure=False,
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario('dotnet_protobuf_async_streaming_ping_pong',
                                  rpc_type='STREAMING',
                                  client_type='ASYNC_CLIENT',
                                  server_type='ASYNC_SERVER')

        yield _ping_pong_scenario('dotnet_protobuf_async_unary_ping_pong',
                                  rpc_type='UNARY',
                                  client_type='ASYNC_CLIENT',
                                  server_type='ASYNC_SERVER',
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'dotnet_protobuf_sync_to_async_unary_ping_pong',
            rpc_type='UNARY',
            client_type='SYNC_CLIENT',
            server_type='ASYNC_SERVER')

        yield _ping_pong_scenario(
            'dotnet_protobuf_async_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='async',
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'dotnet_protobuf_async_streaming_qps_unconstrained',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='async',
            categories=[SCALABLE])

        yield _ping_pong_scenario('dotnet_to_cpp_protobuf_sync_unary_ping_pong',
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='SYNC_SERVER',
                                  server_language='c++',
                                  async_server_threads=1,
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'dotnet_to_cpp_protobuf_async_streaming_ping_pong',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            server_language='c++',
            async_server_threads=1)

        yield _ping_pong_scenario(
            'dotnet_to_cpp_protobuf_async_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='async',
            server_language='c++',
            categories=[SCALABLE])

        yield _ping_pong_scenario(
            'dotnet_to_cpp_protobuf_sync_to_async_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='SYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='sync',
            server_language='c++',
            categories=[SCALABLE])

        yield _ping_pong_scenario(
            'cpp_to_dotnet_protobuf_async_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='async',
            client_language='c++',
            categories=[SCALABLE])

        yield _ping_pong_scenario('dotnet_protobuf_async_unary_ping_pong_1MB',
                                  rpc_type='UNARY',
                                  client_type='ASYNC_CLIENT',
                                  server_type='ASYNC_SERVER',
                                  req_size=1024 * 1024,
                                  resp_size=1024 * 1024,
                                  categories=[SMOKETEST, SCALABLE])

    def __str__(self):
        return 'dotnet'


class PythonLanguage(Language):

    def worker_cmdline(self):
        return ['tools/run_tests/performance/run_worker_python.sh']

    def worker_port_offset(self):
        return 500

    def scenarios(self):
        yield _ping_pong_scenario('python_generic_sync_streaming_ping_pong',
                                  rpc_type='STREAMING',
                                  client_type='SYNC_CLIENT',
                                  server_type='ASYNC_GENERIC_SERVER',
                                  use_generic_payload=True,
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario('python_protobuf_sync_streaming_ping_pong',
                                  rpc_type='STREAMING',
                                  client_type='SYNC_CLIENT',
                                  server_type='ASYNC_SERVER')

        yield _ping_pong_scenario('python_protobuf_async_unary_ping_pong',
                                  rpc_type='UNARY',
                                  client_type='ASYNC_CLIENT',
                                  server_type='ASYNC_SERVER')

        yield _ping_pong_scenario('python_protobuf_sync_unary_ping_pong',
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='ASYNC_SERVER',
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'python_protobuf_sync_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='SYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='sync')

        yield _ping_pong_scenario(
            'python_protobuf_sync_streaming_qps_unconstrained',
            rpc_type='STREAMING',
            client_type='SYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='sync')

        yield _ping_pong_scenario('python_to_cpp_protobuf_sync_unary_ping_pong',
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='ASYNC_SERVER',
                                  server_language='c++',
                                  async_server_threads=0,
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'python_to_cpp_protobuf_sync_streaming_ping_pong',
            rpc_type='STREAMING',
            client_type='SYNC_CLIENT',
            server_type='ASYNC_SERVER',
            server_language='c++',
            async_server_threads=1)

        yield _ping_pong_scenario('python_protobuf_sync_unary_ping_pong_1MB',
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='ASYNC_SERVER',
                                  req_size=1024 * 1024,
                                  resp_size=1024 * 1024,
                                  categories=[SMOKETEST, SCALABLE])

    def __str__(self):
        return 'python'


class PythonAsyncIOLanguage(Language):

    def worker_cmdline(self):
        return ['tools/run_tests/performance/run_worker_python_asyncio.sh']

    def worker_port_offset(self):
        return 1200

    def scenarios(self):
        for outstanding in [64, 128, 256, 512]:
            for channels in [1, 4]:
                yield _ping_pong_scenario(
                    'python_asyncio_protobuf_async_unary_ping_pong_%dx%d_max' %
                    (
                        outstanding,
                        channels,
                    ),
                    rpc_type='UNARY',
                    client_type='ASYNC_CLIENT',
                    server_type='ASYNC_SERVER',
                    outstanding=outstanding * channels,
                    channels=channels,
                    client_processes=0,
                    server_processes=0,
                    unconstrained_client='async',
                    categories=[SCALABLE])

            yield _ping_pong_scenario(
                'python_asyncio_protobuf_async_unary_ping_pong_%d_1thread' %
                outstanding,
                rpc_type='UNARY',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                outstanding=outstanding,
                channels=1,
                client_processes=1,
                server_processes=1,
                unconstrained_client='async',
                categories=[SCALABLE])

        yield _ping_pong_scenario(
            'python_asyncio_generic_async_streaming_ping_pong',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_GENERIC_SERVER',
            channels=1,
            client_processes=1,
            server_processes=1,
            use_generic_payload=True,
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'python_asyncio_protobuf_async_streaming_ping_pong',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            channels=1,
            client_processes=1,
            server_processes=1,
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'python_asyncio_protobuf_async_unary_ping_pong',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            client_processes=1,
            server_processes=1,
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'python_asyncio_protobuf_async_unary_ping_pong',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            channels=1,
            client_processes=1,
            server_processes=1,
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'python_asyncio_protobuf_async_unary_qps_unconstrained',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            channels=1,
            unconstrained_client='async')

        yield _ping_pong_scenario(
            'python_asyncio_protobuf_async_streaming_qps_unconstrained',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            channels=1,
            unconstrained_client='async')

        yield _ping_pong_scenario(
            'python_asyncio_to_cpp_protobuf_async_unary_ping_pong_1thread',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            server_language='c++',
            channels=1,
            client_processes=1,
            unconstrained_client='async',
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'python_asyncio_to_cpp_protobuf_async_unary_ping_pong_max',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            unconstrained_client='async',
            channels=1,
            client_processes=0,
            server_language='c++',
            categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario(
            'python_asyncio_to_cpp_protobuf_sync_streaming_ping_pong_1thread',
            rpc_type='STREAMING',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            channels=1,
            client_processes=1,
            server_processes=1,
            unconstrained_client='async',
            server_language='c++')

        yield _ping_pong_scenario(
            'python_asyncio_protobuf_async_unary_ping_pong_1MB',
            rpc_type='UNARY',
            client_type='ASYNC_CLIENT',
            server_type='ASYNC_SERVER',
            req_size=1024 * 1024,
            resp_size=1024 * 1024,
            channels=1,
            client_processes=1,
            server_processes=1,
            categories=[SMOKETEST, SCALABLE])

    def __str__(self):
        return 'python_asyncio'


class RubyLanguage(Language):

    def worker_cmdline(self):
        return ['tools/run_tests/performance/run_worker_ruby.sh']

    def worker_port_offset(self):
        return 300

    def scenarios(self):
        yield _ping_pong_scenario('ruby_protobuf_sync_streaming_ping_pong',
                                  rpc_type='STREAMING',
                                  client_type='SYNC_CLIENT',
                                  server_type='SYNC_SERVER',
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario('ruby_protobuf_unary_ping_pong',
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='SYNC_SERVER',
                                  categories=[SMOKETEST, SCALABLE])

        yield _ping_pong_scenario('ruby_protobuf_sync_unary_qps_unconstrained',
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='SYNC_SERVER',
                                  unconstrained_client='sync')

        yield _ping_pong_scenario(
            'ruby_protobuf_sync_streaming_qps_unconstrained',
            rpc_type='STREAMING',
            client_type='SYNC_CLIENT',
            server_type='SYNC_SERVER',
            unconstrained_client='sync')

        yield _ping_pong_scenario('ruby_to_cpp_protobuf_sync_unary_ping_pong',
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='SYNC_SERVER',
                                  server_language='c++',
                                  async_server_threads=1)

        yield _ping_pong_scenario(
            'ruby_to_cpp_protobuf_sync_streaming_ping_pong',
            rpc_type='STREAMING',
            client_type='SYNC_CLIENT',
            server_type='SYNC_SERVER',
            server_language='c++',
            async_server_threads=1)

        yield _ping_pong_scenario('ruby_protobuf_unary_ping_pong_1MB',
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='SYNC_SERVER',
                                  req_size=1024 * 1024,
                                  resp_size=1024 * 1024,
                                  categories=[SMOKETEST, SCALABLE])

    def __str__(self):
        return 'ruby'


class Php7Language(Language):

    def __init__(self, php7_protobuf_c=False):
        super().__init__()
        self.php7_protobuf_c = php7_protobuf_c

    def worker_cmdline(self):
        if self.php7_protobuf_c:
            return [
                'tools/run_tests/performance/run_worker_php.sh',
                '--use_protobuf_c_extension'
            ]
        return ['tools/run_tests/performance/run_worker_php.sh']

    def worker_port_offset(self):
        if self.php7_protobuf_c:
            return 900
        return 800

    def scenarios(self):
        php7_extension_mode = 'php7_protobuf_php_extension'
        if self.php7_protobuf_c:
            php7_extension_mode = 'php7_protobuf_c_extension'

        yield _ping_pong_scenario('%s_to_cpp_protobuf_sync_unary_ping_pong' %
                                  php7_extension_mode,
                                  rpc_type='UNARY',
                                  client_type='SYNC_CLIENT',
                                  server_type='SYNC_SERVER',
                                  server_language='c++',
                                  async_server_threads=1)

        yield _ping_pong_scenario(
            '%s_to_cpp_protobuf_sync_streaming_ping_pong' % php7_extension_mode,
            rpc_type='STREAMING',
            client_type='SYNC_CLIENT',
            server_type='SYNC_SERVER',
            server_language='c++',
            async_server_threads=1)

        # TODO(ddyihai): Investigate why when async_server_threads=1/CPU usage 340%, the QPS performs
        # better than async_server_threads=0/CPU usage 490%.
        yield _ping_pong_scenario(
            '%s_to_cpp_protobuf_sync_unary_qps_unconstrained' %
            php7_extension_mode,
            rpc_type='UNARY',
            client_type='SYNC_CLIENT',
            server_type='ASYNC_SERVER',
            server_language='c++',
            outstanding=1,
            async_server_threads=1,
            unconstrained_client='sync')

        yield _ping_pong_scenario(
            '%s_to_cpp_protobuf_sync_streaming_qps_unconstrained' %
            php7_extension_mode,
            rpc_type='STREAMING',
            client_type='SYNC_CLIENT',
            server_type='ASYNC_SERVER',
            server_language='c++',
            outstanding=1,
            async_server_threads=1,
            unconstrained_client='sync')

    def __str__(self):
        if self.php7_protobuf_c:
            return 'php7_protobuf_c'
        return 'php7'


class JavaLanguage(Language):

    def worker_cmdline(self):
        return ['tools/run_tests/performance/run_worker_java.sh']

    def worker_port_offset(self):
        return 400

    def scenarios(self):
        for secure in [True, False]:
            secstr = 'secure' if secure else 'insecure'
            smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]

            yield _ping_pong_scenario(
                'java_generic_async_streaming_ping_pong_%s' % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                use_generic_payload=True,
                async_server_threads=1,
                secure=secure,
                warmup_seconds=JAVA_WARMUP_SECONDS,
                categories=smoketest_categories)

            yield _ping_pong_scenario(
                'java_protobuf_async_streaming_ping_pong_%s' % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                async_server_threads=1,
                secure=secure,
                warmup_seconds=JAVA_WARMUP_SECONDS)

            yield _ping_pong_scenario('java_protobuf_async_unary_ping_pong_%s' %
                                      secstr,
                                      rpc_type='UNARY',
                                      client_type='ASYNC_CLIENT',
                                      server_type='ASYNC_SERVER',
                                      async_server_threads=1,
                                      secure=secure,
                                      warmup_seconds=JAVA_WARMUP_SECONDS,
                                      categories=smoketest_categories)

            yield _ping_pong_scenario('java_protobuf_unary_ping_pong_%s' %
                                      secstr,
                                      rpc_type='UNARY',
                                      client_type='SYNC_CLIENT',
                                      server_type='SYNC_SERVER',
                                      async_server_threads=1,
                                      secure=secure,
                                      warmup_seconds=JAVA_WARMUP_SECONDS)

            yield _ping_pong_scenario(
                'java_protobuf_async_unary_qps_unconstrained_%s' % secstr,
                rpc_type='UNARY',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                unconstrained_client='async',
                secure=secure,
                warmup_seconds=JAVA_WARMUP_SECONDS,
                categories=smoketest_categories + [SCALABLE])

            yield _ping_pong_scenario(
                'java_protobuf_async_streaming_qps_unconstrained_%s' % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                unconstrained_client='async',
                secure=secure,
                warmup_seconds=JAVA_WARMUP_SECONDS,
                categories=[SCALABLE])

            yield _ping_pong_scenario(
                'java_generic_async_streaming_qps_unconstrained_%s' % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                unconstrained_client='async',
                use_generic_payload=True,
                secure=secure,
                warmup_seconds=JAVA_WARMUP_SECONDS,
                categories=[SCALABLE])

            yield _ping_pong_scenario(
                'java_generic_async_streaming_qps_one_server_core_%s' % secstr,
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                unconstrained_client='async-limited',
                use_generic_payload=True,
                async_server_threads=1,
                secure=secure,
                warmup_seconds=JAVA_WARMUP_SECONDS)

            # TODO(jtattermusch): add scenarios java vs C++

    def __str__(self):
        return 'java'


class GoLanguage(Language):

    def worker_cmdline(self):
        return ['tools/run_tests/performance/run_worker_go.sh']

    def worker_port_offset(self):
        return 600

    def scenarios(self):
        for secure in [True, False]:
            secstr = 'secure' if secure else 'insecure'
            smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]

            # ASYNC_GENERIC_SERVER for Go actually uses a sync streaming server,
            # but that's mostly because of lack of better name of the enum value.
            yield _ping_pong_scenario('go_generic_sync_streaming_ping_pong_%s' %
                                      secstr,
                                      rpc_type='STREAMING',
                                      client_type='SYNC_CLIENT',
                                      server_type='ASYNC_GENERIC_SERVER',
                                      use_generic_payload=True,
                                      async_server_threads=1,
                                      secure=secure,
                                      categories=smoketest_categories)

            yield _ping_pong_scenario(
                'go_protobuf_sync_streaming_ping_pong_%s' % secstr,
                rpc_type='STREAMING',
                client_type='SYNC_CLIENT',
                server_type='SYNC_SERVER',
                async_server_threads=1,
                secure=secure)

            yield _ping_pong_scenario('go_protobuf_sync_unary_ping_pong_%s' %
                                      secstr,
                                      rpc_type='UNARY',
                                      client_type='SYNC_CLIENT',
                                      server_type='SYNC_SERVER',
                                      async_server_threads=1,
                                      secure=secure,
                                      categories=smoketest_categories)

            # unconstrained_client='async' is intended (client uses goroutines)
            yield _ping_pong_scenario(
                'go_protobuf_sync_unary_qps_unconstrained_%s' % secstr,
                rpc_type='UNARY',
                client_type='SYNC_CLIENT',
                server_type='SYNC_SERVER',
                unconstrained_client='async',
                secure=secure,
                categories=smoketest_categories + [SCALABLE])

            # unconstrained_client='async' is intended (client uses goroutines)
            yield _ping_pong_scenario(
                'go_protobuf_sync_streaming_qps_unconstrained_%s' % secstr,
                rpc_type='STREAMING',
                client_type='SYNC_CLIENT',
                server_type='SYNC_SERVER',
                unconstrained_client='async',
                secure=secure,
                categories=[SCALABLE])

            # unconstrained_client='async' is intended (client uses goroutines)
            # ASYNC_GENERIC_SERVER for Go actually uses a sync streaming server,
            # but that's mostly because of lack of better name of the enum value.
            yield _ping_pong_scenario(
                'go_generic_sync_streaming_qps_unconstrained_%s' % secstr,
                rpc_type='STREAMING',
                client_type='SYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                unconstrained_client='async',
                use_generic_payload=True,
                secure=secure,
                categories=[SCALABLE])

            # TODO(jtattermusch): add scenarios go vs C++

    def __str__(self):
        return 'go'


class NodeLanguage(Language):

    def __init__(self, node_purejs=False):
        super().__init__()
        self.node_purejs = node_purejs

    def worker_cmdline(self):
        fixture = 'native_js' if self.node_purejs else 'native_native'
        return [
            'tools/run_tests/performance/run_worker_node.sh', fixture,
            '--benchmark_impl=grpc'
        ]

    def worker_port_offset(self):
        if self.node_purejs:
            return 1100
        return 1000

    def scenarios(self):
        node_implementation = 'node_purejs' if self.node_purejs else 'node'
        for secure in [True, False]:
            secstr = 'secure' if secure else 'insecure'
            smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]

            yield _ping_pong_scenario(
                '%s_to_node_generic_async_streaming_ping_pong_%s' %
                (node_implementation, secstr),
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                server_language='node',
                use_generic_payload=True,
                async_server_threads=1,
                secure=secure,
                categories=smoketest_categories)

            yield _ping_pong_scenario(
                '%s_to_node_protobuf_async_streaming_ping_pong_%s' %
                (node_implementation, secstr),
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                server_language='node',
                async_server_threads=1,
                secure=secure)

            yield _ping_pong_scenario(
                '%s_to_node_protobuf_async_unary_ping_pong_%s' %
                (node_implementation, secstr),
                rpc_type='UNARY',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                server_language='node',
                async_server_threads=1,
                secure=secure,
                categories=smoketest_categories)

            yield _ping_pong_scenario(
                '%s_to_node_protobuf_async_unary_qps_unconstrained_%s' %
                (node_implementation, secstr),
                rpc_type='UNARY',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                server_language='node',
                unconstrained_client='async',
                secure=secure,
                categories=smoketest_categories + [SCALABLE])

            yield _ping_pong_scenario(
                '%s_to_node_protobuf_async_streaming_qps_unconstrained_%s' %
                (node_implementation, secstr),
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_SERVER',
                server_language='node',
                unconstrained_client='async',
                secure=secure,
                categories=[SCALABLE])

            yield _ping_pong_scenario(
                '%s_to_node_generic_async_streaming_qps_unconstrained_%s' %
                (node_implementation, secstr),
                rpc_type='STREAMING',
                client_type='ASYNC_CLIENT',
                server_type='ASYNC_GENERIC_SERVER',
                server_language='node',
                unconstrained_client='async',
                use_generic_payload=True,
                secure=secure,
                categories=[SCALABLE])

            # TODO(murgatroid99): add scenarios node vs C++

    def __str__(self):
        if self.node_purejs:
            return 'node_purejs'
        return 'node'


LANGUAGES = {
    'c++': CXXLanguage(),
    'csharp': CSharpLanguage(),
    'dotnet': DotnetLanguage(),
    'ruby': RubyLanguage(),
    'php7': Php7Language(),
    'php7_protobuf_c': Php7Language(php7_protobuf_c=True),
    'java': JavaLanguage(),
    'python': PythonLanguage(),
    'python_asyncio': PythonAsyncIOLanguage(),
    'go': GoLanguage(),
    'node': NodeLanguage(),
    'node_purejs': NodeLanguage(node_purejs=True)
}
