| 1 | # The MIT License (MIT) |
| 2 | # |
| 3 | # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com> |
| 4 | # |
| 5 | # Permission is hereby granted, free of charge, to any person obtaining a copy |
| 6 | # of this software and associated documentation files (the "Software"), to deal |
| 7 | # in the Software without restriction, including without limitation the rights |
| 8 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 9 | # copies of the Software, and to permit persons to whom the Software is |
| 10 | # furnished to do so, subject to the following conditions: |
| 11 | # |
| 12 | # The above copyright notice and this permission notice shall be included in |
| 13 | # all copies or substantial portions of the Software. |
| 14 | # |
| 15 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 18 | # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 21 | # THE SOFTWARE. |
| 22 | |
| 23 | from bt2 import utils, native_bt |
| 24 | import bt2 |
| 25 | import itertools |
| 26 | from bt2 import message_iterator as bt2_message_iterator |
| 27 | from bt2 import port as bt2_port |
| 28 | from bt2 import component as bt2_component |
| 29 | from bt2 import value as bt2_value |
| 30 | from bt2 import plugin as bt2_plugin |
| 31 | import datetime |
| 32 | from collections import namedtuple |
| 33 | import numbers |
| 34 | |
| 35 | |
| 36 | # a pair of component and ComponentSpec |
| 37 | _ComponentAndSpec = namedtuple('_ComponentAndSpec', ['comp', 'spec']) |
| 38 | |
| 39 | |
| 40 | class _BaseComponentSpec: |
| 41 | # Base for any component spec that can be passed to |
| 42 | # TraceCollectionMessageIterator. |
| 43 | def __init__(self, params, obj, logging_level): |
| 44 | if logging_level is not None: |
| 45 | utils._check_log_level(logging_level) |
| 46 | |
| 47 | self._params = bt2.create_value(params) |
| 48 | self._obj = obj |
| 49 | self._logging_level = logging_level |
| 50 | |
| 51 | @property |
| 52 | def params(self): |
| 53 | return self._params |
| 54 | |
| 55 | @property |
| 56 | def obj(self): |
| 57 | return self._obj |
| 58 | |
| 59 | @property |
| 60 | def logging_level(self): |
| 61 | return self._logging_level |
| 62 | |
| 63 | |
| 64 | class ComponentSpec(_BaseComponentSpec): |
| 65 | # A component spec with a specific component class. |
| 66 | def __init__( |
| 67 | self, |
| 68 | component_class, |
| 69 | params=None, |
| 70 | obj=None, |
| 71 | logging_level=bt2.LoggingLevel.NONE, |
| 72 | ): |
| 73 | if type(params) is str: |
| 74 | params = {'inputs': [params]} |
| 75 | |
| 76 | super().__init__(params, obj, logging_level) |
| 77 | |
| 78 | is_cc_object = isinstance( |
| 79 | component_class, |
| 80 | (bt2._SourceComponentClassConst, bt2._FilterComponentClassConst), |
| 81 | ) |
| 82 | is_user_cc_type = isinstance( |
| 83 | component_class, bt2_component._UserComponentType |
| 84 | ) and issubclass( |
| 85 | component_class, (bt2._UserSourceComponent, bt2._UserFilterComponent) |
| 86 | ) |
| 87 | |
| 88 | if not is_cc_object and not is_user_cc_type: |
| 89 | raise TypeError( |
| 90 | "'{}' is not a source or filter component class".format( |
| 91 | component_class.__class__.__name__ |
| 92 | ) |
| 93 | ) |
| 94 | |
| 95 | self._component_class = component_class |
| 96 | |
| 97 | @property |
| 98 | def component_class(self): |
| 99 | return self._component_class |
| 100 | |
| 101 | @classmethod |
| 102 | def from_named_plugin_and_component_class( |
| 103 | cls, |
| 104 | plugin_name, |
| 105 | component_class_name, |
| 106 | params=None, |
| 107 | obj=None, |
| 108 | logging_level=bt2.LoggingLevel.NONE, |
| 109 | ): |
| 110 | plugin = bt2.find_plugin(plugin_name) |
| 111 | |
| 112 | if plugin is None: |
| 113 | raise ValueError('no such plugin: {}'.format(plugin_name)) |
| 114 | |
| 115 | if component_class_name in plugin.source_component_classes: |
| 116 | comp_class = plugin.source_component_classes[component_class_name] |
| 117 | elif component_class_name in plugin.filter_component_classes: |
| 118 | comp_class = plugin.filter_component_classes[component_class_name] |
| 119 | else: |
| 120 | raise KeyError( |
| 121 | 'source or filter component class `{}` not found in plugin `{}`'.format( |
| 122 | component_class_name, plugin_name |
| 123 | ) |
| 124 | ) |
| 125 | |
| 126 | return cls(comp_class, params, obj, logging_level) |
| 127 | |
| 128 | |
| 129 | class AutoSourceComponentSpec(_BaseComponentSpec): |
| 130 | # A component spec that does automatic source discovery. |
| 131 | _no_obj = object() |
| 132 | |
| 133 | def __init__(self, input, params=None, obj=_no_obj, logging_level=None): |
| 134 | super().__init__(params, obj, logging_level) |
| 135 | self._input = input |
| 136 | |
| 137 | @property |
| 138 | def input(self): |
| 139 | return self._input |
| 140 | |
| 141 | |
| 142 | def _auto_discover_source_component_specs(auto_source_comp_specs, plugin_set): |
| 143 | # Transform a list of `AutoSourceComponentSpec` in a list of `ComponentSpec` |
| 144 | # using the automatic source discovery mechanism. |
| 145 | inputs = bt2.ArrayValue([spec.input for spec in auto_source_comp_specs]) |
| 146 | |
| 147 | if plugin_set is None: |
| 148 | plugin_set = bt2.find_plugins() |
| 149 | else: |
| 150 | utils._check_type(plugin_set, bt2_plugin._PluginSet) |
| 151 | |
| 152 | res_ptr = native_bt.bt2_auto_discover_source_components( |
| 153 | inputs._ptr, plugin_set._ptr |
| 154 | ) |
| 155 | |
| 156 | if res_ptr is None: |
| 157 | raise bt2._MemoryError('cannot auto discover source components') |
| 158 | |
| 159 | res = bt2_value._create_from_ptr(res_ptr) |
| 160 | |
| 161 | assert type(res) == bt2.MapValue |
| 162 | assert 'status' in res |
| 163 | |
| 164 | status = res['status'] |
| 165 | utils._handle_func_status(status, 'cannot auto-discover source components') |
| 166 | |
| 167 | comp_specs = [] |
| 168 | comp_specs_raw = res['results'] |
| 169 | assert type(comp_specs_raw) == bt2.ArrayValue |
| 170 | |
| 171 | used_input_indices = set() |
| 172 | |
| 173 | for comp_spec_raw in comp_specs_raw: |
| 174 | assert type(comp_spec_raw) == bt2.ArrayValue |
| 175 | assert len(comp_spec_raw) == 4 |
| 176 | |
| 177 | plugin_name = comp_spec_raw[0] |
| 178 | assert type(plugin_name) == bt2.StringValue |
| 179 | plugin_name = str(plugin_name) |
| 180 | |
| 181 | class_name = comp_spec_raw[1] |
| 182 | assert type(class_name) == bt2.StringValue |
| 183 | class_name = str(class_name) |
| 184 | |
| 185 | comp_inputs = comp_spec_raw[2] |
| 186 | assert type(comp_inputs) == bt2.ArrayValue |
| 187 | |
| 188 | comp_orig_indices = comp_spec_raw[3] |
| 189 | assert type(comp_orig_indices) |
| 190 | |
| 191 | params = bt2.MapValue() |
| 192 | logging_level = bt2.LoggingLevel.NONE |
| 193 | obj = None |
| 194 | |
| 195 | # Compute `params` for this component by piling up params given to all |
| 196 | # AutoSourceComponentSpec objects that contributed in the instantiation |
| 197 | # of this component. |
| 198 | # |
| 199 | # The effective log level for a component is the last one specified |
| 200 | # across the AutoSourceComponentSpec that contributed in its |
| 201 | # instantiation. |
| 202 | for idx in comp_orig_indices: |
| 203 | orig_spec = auto_source_comp_specs[idx] |
| 204 | |
| 205 | if orig_spec.params is not None: |
| 206 | params.update(orig_spec.params) |
| 207 | |
| 208 | if orig_spec.logging_level is not None: |
| 209 | logging_level = orig_spec.logging_level |
| 210 | |
| 211 | if orig_spec.obj is not AutoSourceComponentSpec._no_obj: |
| 212 | obj = orig_spec.obj |
| 213 | |
| 214 | used_input_indices.add(int(idx)) |
| 215 | |
| 216 | params['inputs'] = comp_inputs |
| 217 | |
| 218 | comp_specs.append( |
| 219 | ComponentSpec.from_named_plugin_and_component_class( |
| 220 | plugin_name, |
| 221 | class_name, |
| 222 | params=params, |
| 223 | obj=obj, |
| 224 | logging_level=logging_level, |
| 225 | ) |
| 226 | ) |
| 227 | |
| 228 | if len(used_input_indices) != len(inputs): |
| 229 | unused_input_indices = set(range(len(inputs))) - used_input_indices |
| 230 | unused_input_indices = sorted(unused_input_indices) |
| 231 | unused_inputs = [str(inputs[x]) for x in unused_input_indices] |
| 232 | |
| 233 | msg = ( |
| 234 | 'Some auto source component specs did not produce any component: ' |
| 235 | + ', '.join(unused_inputs) |
| 236 | ) |
| 237 | raise RuntimeError(msg) |
| 238 | |
| 239 | return comp_specs |
| 240 | |
| 241 | |
| 242 | # datetime.datetime or integral to nanoseconds |
| 243 | def _get_ns(obj): |
| 244 | if obj is None: |
| 245 | return |
| 246 | |
| 247 | if isinstance(obj, numbers.Real): |
| 248 | # consider that it's already in seconds |
| 249 | s = obj |
| 250 | elif isinstance(obj, datetime.datetime): |
| 251 | # s -> ns |
| 252 | s = obj.timestamp() |
| 253 | else: |
| 254 | raise TypeError( |
| 255 | '"{}" is not an integral number or a datetime.datetime object'.format(obj) |
| 256 | ) |
| 257 | |
| 258 | return int(s * 1e9) |
| 259 | |
| 260 | |
| 261 | class _TraceCollectionMessageIteratorProxySink(bt2_component._UserSinkComponent): |
| 262 | def __init__(self, config, params, msg_list): |
| 263 | assert type(msg_list) is list |
| 264 | self._msg_list = msg_list |
| 265 | self._add_input_port('in') |
| 266 | |
| 267 | def _user_graph_is_configured(self): |
| 268 | self._msg_iter = self._create_input_port_message_iterator( |
| 269 | self._input_ports['in'] |
| 270 | ) |
| 271 | |
| 272 | def _user_consume(self): |
| 273 | assert self._msg_list[0] is None |
| 274 | self._msg_list[0] = next(self._msg_iter) |
| 275 | |
| 276 | |
| 277 | class TraceCollectionMessageIterator(bt2_message_iterator._MessageIterator): |
| 278 | def __init__( |
| 279 | self, |
| 280 | source_component_specs, |
| 281 | filter_component_specs=None, |
| 282 | stream_intersection_mode=False, |
| 283 | begin=None, |
| 284 | end=None, |
| 285 | plugin_set=None, |
| 286 | ): |
| 287 | utils._check_bool(stream_intersection_mode) |
| 288 | self._stream_intersection_mode = stream_intersection_mode |
| 289 | self._begin_ns = _get_ns(begin) |
| 290 | self._end_ns = _get_ns(end) |
| 291 | self._msg_list = [None] |
| 292 | |
| 293 | # If a single item is provided, convert to a list. |
| 294 | if type(source_component_specs) in ( |
| 295 | ComponentSpec, |
| 296 | AutoSourceComponentSpec, |
| 297 | str, |
| 298 | ): |
| 299 | source_component_specs = [source_component_specs] |
| 300 | |
| 301 | # Convert any string to an AutoSourceComponentSpec. |
| 302 | def str_to_auto(item): |
| 303 | if type(item) is str: |
| 304 | item = AutoSourceComponentSpec(item) |
| 305 | |
| 306 | return item |
| 307 | |
| 308 | source_component_specs = [str_to_auto(s) for s in source_component_specs] |
| 309 | |
| 310 | if type(filter_component_specs) is ComponentSpec: |
| 311 | filter_component_specs = [filter_component_specs] |
| 312 | elif filter_component_specs is None: |
| 313 | filter_component_specs = [] |
| 314 | |
| 315 | self._validate_source_component_specs(source_component_specs) |
| 316 | self._validate_filter_component_specs(filter_component_specs) |
| 317 | |
| 318 | # Pass any `ComponentSpec` instance as-is. |
| 319 | self._src_comp_specs = [ |
| 320 | spec for spec in source_component_specs if type(spec) is ComponentSpec |
| 321 | ] |
| 322 | |
| 323 | # Convert any `AutoSourceComponentSpec` in concrete `ComponentSpec` instances. |
| 324 | auto_src_comp_specs = [ |
| 325 | spec |
| 326 | for spec in source_component_specs |
| 327 | if type(spec) is AutoSourceComponentSpec |
| 328 | ] |
| 329 | self._src_comp_specs += _auto_discover_source_component_specs( |
| 330 | auto_src_comp_specs, plugin_set |
| 331 | ) |
| 332 | |
| 333 | self._flt_comp_specs = filter_component_specs |
| 334 | self._next_suffix = 1 |
| 335 | self._connect_ports = False |
| 336 | |
| 337 | # lists of _ComponentAndSpec |
| 338 | self._src_comps_and_specs = [] |
| 339 | self._flt_comps_and_specs = [] |
| 340 | |
| 341 | self._build_graph() |
| 342 | |
| 343 | def _compute_stream_intersections(self): |
| 344 | # Pre-compute the trimmer range to use for each port in the graph, when |
| 345 | # stream intersection mode is enabled. |
| 346 | self._stream_inter_port_to_range = {} |
| 347 | |
| 348 | for src_comp_and_spec in self._src_comps_and_specs: |
| 349 | # Query the port's component for the `babeltrace.trace-infos` |
| 350 | # object which contains the range for each stream, from which we can |
| 351 | # compute the intersection of the streams in each trace. |
| 352 | query_exec = bt2.QueryExecutor( |
| 353 | src_comp_and_spec.spec.component_class, |
| 354 | 'babeltrace.trace-infos', |
| 355 | src_comp_and_spec.spec.params, |
| 356 | ) |
| 357 | trace_infos = query_exec.query() |
| 358 | |
| 359 | for trace_info in trace_infos: |
| 360 | begin = max( |
| 361 | [ |
| 362 | stream['range-ns']['begin'] |
| 363 | for stream in trace_info['stream-infos'] |
| 364 | ] |
| 365 | ) |
| 366 | end = min( |
| 367 | [stream['range-ns']['end'] for stream in trace_info['stream-infos']] |
| 368 | ) |
| 369 | |
| 370 | # Each port associated to this trace will have this computed |
| 371 | # range. |
| 372 | for stream in trace_info['stream-infos']: |
| 373 | # A port name is unique within a component, but not |
| 374 | # necessarily across all components. Use a component |
| 375 | # and port name pair to make it unique across the graph. |
| 376 | port_name = str(stream['port-name']) |
| 377 | key = (src_comp_and_spec.comp.addr, port_name) |
| 378 | self._stream_inter_port_to_range[key] = (begin, end) |
| 379 | |
| 380 | def _validate_source_component_specs(self, comp_specs): |
| 381 | for comp_spec in comp_specs: |
| 382 | if ( |
| 383 | type(comp_spec) is not ComponentSpec |
| 384 | and type(comp_spec) is not AutoSourceComponentSpec |
| 385 | ): |
| 386 | raise TypeError( |
| 387 | '"{}" object is not a ComponentSpec or AutoSourceComponentSpec'.format( |
| 388 | type(comp_spec) |
| 389 | ) |
| 390 | ) |
| 391 | |
| 392 | def _validate_filter_component_specs(self, comp_specs): |
| 393 | for comp_spec in comp_specs: |
| 394 | if type(comp_spec) is not ComponentSpec: |
| 395 | raise TypeError( |
| 396 | '"{}" object is not a ComponentSpec'.format(type(comp_spec)) |
| 397 | ) |
| 398 | |
| 399 | def __next__(self): |
| 400 | assert self._msg_list[0] is None |
| 401 | self._graph.run_once() |
| 402 | msg = self._msg_list[0] |
| 403 | assert msg is not None |
| 404 | self._msg_list[0] = None |
| 405 | return msg |
| 406 | |
| 407 | def _create_stream_intersection_trimmer(self, component, port): |
| 408 | key = (component.addr, port.name) |
| 409 | begin, end = self._stream_inter_port_to_range[key] |
| 410 | name = 'trimmer-{}-{}'.format(component.name, port.name) |
| 411 | return self._create_trimmer(begin, end, name) |
| 412 | |
| 413 | def _create_muxer(self): |
| 414 | plugin = bt2.find_plugin('utils') |
| 415 | |
| 416 | if plugin is None: |
| 417 | raise RuntimeError('cannot find "utils" plugin (needed for the muxer)') |
| 418 | |
| 419 | if 'muxer' not in plugin.filter_component_classes: |
| 420 | raise RuntimeError( |
| 421 | 'cannot find "muxer" filter component class in "utils" plugin' |
| 422 | ) |
| 423 | |
| 424 | comp_cls = plugin.filter_component_classes['muxer'] |
| 425 | return self._graph.add_component(comp_cls, 'muxer') |
| 426 | |
| 427 | def _create_trimmer(self, begin_ns, end_ns, name): |
| 428 | plugin = bt2.find_plugin('utils') |
| 429 | |
| 430 | if plugin is None: |
| 431 | raise RuntimeError('cannot find "utils" plugin (needed for the trimmer)') |
| 432 | |
| 433 | if 'trimmer' not in plugin.filter_component_classes: |
| 434 | raise RuntimeError( |
| 435 | 'cannot find "trimmer" filter component class in "utils" plugin' |
| 436 | ) |
| 437 | |
| 438 | params = {} |
| 439 | |
| 440 | def ns_to_string(ns): |
| 441 | s_part = ns // 1000000000 |
| 442 | ns_part = ns % 1000000000 |
| 443 | return '{}.{:09d}'.format(s_part, ns_part) |
| 444 | |
| 445 | if begin_ns is not None: |
| 446 | params['begin'] = ns_to_string(begin_ns) |
| 447 | |
| 448 | if end_ns is not None: |
| 449 | params['end'] = ns_to_string(end_ns) |
| 450 | |
| 451 | comp_cls = plugin.filter_component_classes['trimmer'] |
| 452 | return self._graph.add_component(comp_cls, name, params) |
| 453 | |
| 454 | def _get_unique_comp_name(self, comp_cls): |
| 455 | name = comp_cls.name |
| 456 | comps_and_specs = itertools.chain( |
| 457 | self._src_comps_and_specs, self._flt_comps_and_specs |
| 458 | ) |
| 459 | |
| 460 | if name in [comp_and_spec.comp.name for comp_and_spec in comps_and_specs]: |
| 461 | name += '-{}'.format(self._next_suffix) |
| 462 | self._next_suffix += 1 |
| 463 | |
| 464 | return name |
| 465 | |
| 466 | def _create_comp(self, comp_spec): |
| 467 | comp_cls = comp_spec.component_class |
| 468 | name = self._get_unique_comp_name(comp_cls) |
| 469 | comp = self._graph.add_component( |
| 470 | comp_cls, name, comp_spec.params, comp_spec.obj, comp_spec.logging_level |
| 471 | ) |
| 472 | return comp |
| 473 | |
| 474 | def _get_free_muxer_input_port(self): |
| 475 | for port in self._muxer_comp.input_ports.values(): |
| 476 | if not port.is_connected: |
| 477 | return port |
| 478 | |
| 479 | def _connect_src_comp_port(self, component, port): |
| 480 | # if this trace collection iterator is in stream intersection |
| 481 | # mode, we need this connection: |
| 482 | # |
| 483 | # port -> trimmer -> muxer |
| 484 | # |
| 485 | # otherwise, simply: |
| 486 | # |
| 487 | # port -> muxer |
| 488 | if self._stream_intersection_mode: |
| 489 | trimmer_comp = self._create_stream_intersection_trimmer(component, port) |
| 490 | self._graph.connect_ports(port, trimmer_comp.input_ports['in']) |
| 491 | port_to_muxer = trimmer_comp.output_ports['out'] |
| 492 | else: |
| 493 | port_to_muxer = port |
| 494 | |
| 495 | self._graph.connect_ports(port_to_muxer, self._get_free_muxer_input_port()) |
| 496 | |
| 497 | def _graph_port_added(self, component, port): |
| 498 | if not self._connect_ports: |
| 499 | return |
| 500 | |
| 501 | if type(port) is bt2_port._InputPortConst: |
| 502 | return |
| 503 | |
| 504 | if component not in [comp.comp for comp in self._src_comps_and_specs]: |
| 505 | # do not care about non-source components (muxer, trimmer, etc.) |
| 506 | return |
| 507 | |
| 508 | self._connect_src_comp_port(component, port) |
| 509 | |
| 510 | def _get_greatest_operative_mip_version(self): |
| 511 | def append_comp_specs_descriptors(descriptors, comp_specs): |
| 512 | for comp_spec in comp_specs: |
| 513 | descriptors.append( |
| 514 | bt2.ComponentDescriptor( |
| 515 | comp_spec.component_class, comp_spec.params, comp_spec.obj |
| 516 | ) |
| 517 | ) |
| 518 | |
| 519 | descriptors = [] |
| 520 | append_comp_specs_descriptors(descriptors, self._src_comp_specs) |
| 521 | append_comp_specs_descriptors(descriptors, self._flt_comp_specs) |
| 522 | |
| 523 | if self._stream_intersection_mode: |
| 524 | # we also need at least one `flt.utils.trimmer` component |
| 525 | comp_spec = ComponentSpec.from_named_plugin_and_component_class( |
| 526 | 'utils', 'trimmer' |
| 527 | ) |
| 528 | append_comp_specs_descriptors(descriptors, [comp_spec]) |
| 529 | |
| 530 | mip_version = bt2.get_greatest_operative_mip_version(descriptors) |
| 531 | |
| 532 | if mip_version is None: |
| 533 | msg = 'failed to find an operative message interchange protocol version (components are not interoperable)' |
| 534 | raise RuntimeError(msg) |
| 535 | |
| 536 | return mip_version |
| 537 | |
| 538 | def _build_graph(self): |
| 539 | self._graph = bt2.Graph(self._get_greatest_operative_mip_version()) |
| 540 | self._graph.add_port_added_listener(self._graph_port_added) |
| 541 | self._muxer_comp = self._create_muxer() |
| 542 | |
| 543 | if self._begin_ns is not None or self._end_ns is not None: |
| 544 | trimmer_comp = self._create_trimmer(self._begin_ns, self._end_ns, 'trimmer') |
| 545 | self._graph.connect_ports( |
| 546 | self._muxer_comp.output_ports['out'], trimmer_comp.input_ports['in'] |
| 547 | ) |
| 548 | last_flt_out_port = trimmer_comp.output_ports['out'] |
| 549 | else: |
| 550 | last_flt_out_port = self._muxer_comp.output_ports['out'] |
| 551 | |
| 552 | # create extra filter components (chained) |
| 553 | for comp_spec in self._flt_comp_specs: |
| 554 | comp = self._create_comp(comp_spec) |
| 555 | self._flt_comps_and_specs.append(_ComponentAndSpec(comp, comp_spec)) |
| 556 | |
| 557 | # connect the extra filter chain |
| 558 | for comp_and_spec in self._flt_comps_and_specs: |
| 559 | in_port = list(comp_and_spec.comp.input_ports.values())[0] |
| 560 | out_port = list(comp_and_spec.comp.output_ports.values())[0] |
| 561 | self._graph.connect_ports(last_flt_out_port, in_port) |
| 562 | last_flt_out_port = out_port |
| 563 | |
| 564 | # Here we create the components, self._graph_port_added() is |
| 565 | # called when they add ports, but the callback returns early |
| 566 | # because self._connect_ports is False. This is because the |
| 567 | # self._graph_port_added() could not find the associated source |
| 568 | # component specification in self._src_comps_and_specs because |
| 569 | # it does not exist yet (it needs the created component to |
| 570 | # exist). |
| 571 | for comp_spec in self._src_comp_specs: |
| 572 | comp = self._create_comp(comp_spec) |
| 573 | self._src_comps_and_specs.append(_ComponentAndSpec(comp, comp_spec)) |
| 574 | |
| 575 | if self._stream_intersection_mode: |
| 576 | self._compute_stream_intersections() |
| 577 | |
| 578 | # Now we connect the ports which exist at this point. We allow |
| 579 | # self._graph_port_added() to automatically connect _new_ ports. |
| 580 | self._connect_ports = True |
| 581 | |
| 582 | for comp_and_spec in self._src_comps_and_specs: |
| 583 | # Keep a separate list because comp_and_spec.output_ports |
| 584 | # could change during the connection of one of its ports. |
| 585 | # Any new port is handled by self._graph_port_added(). |
| 586 | out_ports = [port for port in comp_and_spec.comp.output_ports.values()] |
| 587 | |
| 588 | for out_port in out_ports: |
| 589 | if out_port.is_connected: |
| 590 | continue |
| 591 | |
| 592 | self._connect_src_comp_port(comp_and_spec.comp, out_port) |
| 593 | |
| 594 | # Add the proxy sink, passing our message list to share consumed |
| 595 | # messages with this trace collection message iterator. |
| 596 | sink = self._graph.add_component( |
| 597 | _TraceCollectionMessageIteratorProxySink, 'proxy-sink', obj=self._msg_list |
| 598 | ) |
| 599 | sink_in_port = sink.input_ports['in'] |
| 600 | |
| 601 | # connect last filter to proxy sink |
| 602 | self._graph.connect_ports(last_flt_out_port, sink_in_port) |