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9fb722e 38cba90 9fb722e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | from __future__ import annotations
import time
import uuid
from dataclasses import dataclass
from typing import Any
from hearthnet.bus.capability import (
CapabilityDescriptor,
CapabilityEntry,
Handler,
ParamsPredicate,
RouteRequest,
)
from hearthnet.bus.health import HealthTracker
from hearthnet.bus.registry import Diff, RegistryEvent, Registry
from hearthnet.bus.router import BusConfig, Router
from hearthnet.types import CapabilityName, HearthNetError, Version
class BusError(HearthNetError):
pass
class InMemoryTransport:
def __init__(self) -> None:
self._buses: dict[str, CapabilityBus] = {}
def register(self, bus: CapabilityBus) -> None:
self._buses[bus.node_id_full] = bus
async def call(self, node_id: str, req: RouteRequest) -> dict[str, Any]:
try:
bus = self._buses[node_id]
except KeyError as exc:
raise BusError("partition", f"node {node_id} is not reachable") from exc
inbound = RouteRequest(
capability=req.capability,
version_req=req.version_req,
body=req.body,
caller=req.caller,
trace_id=req.trace_id,
session_id=req.session_id,
deadline_ms=req.deadline_ms,
stream=req.stream,
)
return await bus.handle_call(inbound, local_only=True)
@dataclass(frozen=True)
class CallTraceEvent:
trace_id: str
capability: CapabilityName
from_node: str
to_node: str
result: str
ms: float
@dataclass(frozen=True)
class TopologySnapshot:
our_node_id: str
peers: list[dict[str, Any]]
capabilities_local: list[dict[str, Any]]
capabilities_remote: list[dict[str, Any]]
in_flight_total: int
traces: list[CallTraceEvent]
class CapabilityBus:
def __init__(
self,
node_id_full: str,
community_id: str,
transport: InMemoryTransport | None = None,
config: BusConfig | None = None,
) -> None:
self.node_id_full = node_id_full
self.community_id = community_id
self.registry = Registry(our_node_id=node_id_full)
self.health = HealthTracker()
self.router = Router(self.registry, config)
self.transport = transport or InMemoryTransport()
self.transport.register(self)
self._traces: list[CallTraceEvent] = []
self._offline_stash: list[tuple[CapabilityDescriptor, Handler, ParamsPredicate | None]] = []
def register_capability(
self,
descriptor: CapabilityDescriptor,
handler: Handler,
params_compatible: ParamsPredicate | None = None,
) -> None:
self.registry.register_local(descriptor, handler, params_compatible)
def register_service(self, service: Any) -> None:
for item in service.capabilities():
descriptor, handler, *rest = item
predicate = rest[0] if rest else None
self.register_capability(descriptor, handler, predicate)
async def call(
self,
capability: CapabilityName,
version_req: Version,
body: dict[str, Any],
*,
session_id: str | None = None,
) -> dict[str, Any]:
req = RouteRequest(
capability=capability,
version_req=version_req,
body=body,
caller=self.node_id_full,
trace_id=uuid.uuid4().hex,
session_id=session_id,
deadline_ms=int((time.monotonic() + 10) * 1000),
)
return await self.handle_call(req)
async def handle_call(self, req: RouteRequest, *, local_only: bool = False) -> dict[str, Any]:
entry = self.router.route_sticky(req) if req.session_id else self.router.route(req)
if entry is None:
raise BusError("not_found", f"no provider for {req.capability}@{req.version_req}")
started = time.monotonic()
entry.in_flight += 1
try:
if entry.is_local:
if entry.handler is None:
raise BusError("not_implemented", entry.descriptor.name)
result = await entry.handler(req)
elif local_only:
raise BusError("not_found", f"remote entry cannot satisfy inbound {req.capability}")
else:
result = await self.transport.call(entry.node_id, req)
elapsed = (time.monotonic() - started) * 1000
self.health.record(entry, success=True, latency_ms=elapsed)
self._traces.append(
CallTraceEvent(
req.trace_id, req.capability, req.caller, entry.node_id, "ok", elapsed
)
)
return result
except HearthNetError as exc:
elapsed = (time.monotonic() - started) * 1000
self.health.record(entry, success=False, latency_ms=elapsed)
self._traces.append(
CallTraceEvent(
req.trace_id, req.capability, req.caller, entry.node_id, exc.code, elapsed
)
)
raise
finally:
entry.in_flight -= 1
def deregister_internet_capabilities(self) -> int:
removed = 0
for entry in list(self.registry.all_local()):
if entry.descriptor.params.get("requires_internet"):
removed_entry = self.registry.deregister_local(
entry.descriptor.name, entry.descriptor.version
)
if removed_entry and removed_entry.handler:
self._offline_stash.append(
(
removed_entry.descriptor,
removed_entry.handler,
removed_entry.params_compatible,
)
)
removed += 1
return removed
def restore_internet_capabilities(self) -> int:
restored = 0
while self._offline_stash:
descriptor, handler, predicate = self._offline_stash.pop(0)
self.register_capability(descriptor, handler, predicate)
restored += 1
return restored
def topology_snapshot(self, peers: list[dict[str, Any]] | None = None) -> TopologySnapshot:
return TopologySnapshot(
our_node_id=self.node_id_full,
peers=peers or [],
capabilities_local=[_entry_view(entry) for entry in self.registry.all_local()],
capabilities_remote=[_entry_view(entry) for entry in self.registry.all_remote()],
in_flight_total=sum(entry.in_flight for entry in self.registry.all()),
traces=list(self._traces[-50:]),
)
def _entry_view(entry: CapabilityEntry) -> dict[str, Any]:
return {
"node_id": entry.node_id,
"name": entry.descriptor.name,
"version": entry.descriptor.version_str,
"local": entry.is_local,
"params": dict(entry.descriptor.params),
"success_rate": entry.success_rate,
"quarantined": entry.quarantined_until > time.monotonic(),
}
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