File size: 5,189 Bytes
bc575bc | 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 | import {
type Context,
createFacetHost,
createRemoteServiceEndpoint,
createStaticFacetLoader,
defineFacet,
type FacetHost,
type FacetLoader,
type JsonValue,
type RemoteServiceEndpoint,
type ServiceCall,
type ServiceProviderUpdate,
} from "@earendil-works/chord";
import type { AgentHarness, AgentLane } from "@earendil-works/pi-agent-core";
import type { ModelRuntime } from "../../core/model-runtime.ts";
import type { SettingsManager } from "../../core/settings-manager.ts";
import { AgentController } from "./agent-controller.ts";
import { createAgentController } from "./agent-controller-provider.ts";
import { createModelsServiceFacet } from "./models-provider.ts";
import { SessionPlugins } from "./plugins.ts";
import { createTranscriptServiceFacet } from "./transcript-provider.ts";
export interface SessionWorkerRuntime {
readonly harness: AgentHarness;
readonly lane?: AgentLane;
readonly modelRuntime?: ModelRuntime;
readonly settingsManager?: SettingsManager;
readonly facetLoader?: FacetLoader;
}
export interface WorkerServiceScope {
readonly serverConnectionId: string;
readonly attachmentId: string;
}
interface ScopedServiceEndpoint {
readonly scope: WorkerServiceScope;
readonly endpoint: RemoteServiceEndpoint;
}
export interface SessionWorkerServices {
invoke(call: ServiceCall, scope: WorkerServiceScope, context: Context): Promise<JsonValue | undefined>;
removeSubscriptions(matches: (scope: WorkerServiceScope) => boolean): void;
dispose(): Promise<void>;
}
export async function createSessionWorkerServices(options: {
readonly lane: AgentLane;
readonly modelRuntime: ModelRuntime | undefined;
readonly settingsManager?: SettingsManager;
readonly facetLoader?: FacetLoader;
publish(scope: WorkerServiceScope, subscriptionId: string, update: ServiceProviderUpdate): Promise<void>;
}): Promise<SessionWorkerServices> {
const agentControllerRuntimeFacet = defineFacet({
id: "@pi/agent-controller-runtime",
setup(env) {
env.provide(AgentController, createAgentController(options.lane));
},
});
let reloadPlugins = (): Promise<void> => Promise.reject(new Error("Session plugins are not ready"));
const pluginRuntimeFacet = defineFacet({
id: "@pi/session-plugins-runtime",
setup(env) {
env.provide(SessionPlugins, { reload: () => reloadPlugins() });
},
});
const builtins = await createStaticFacetLoader([
agentControllerRuntimeFacet,
pluginRuntimeFacet,
createModelsServiceFacet(options),
createTranscriptServiceFacet(options.lane),
]).load();
const pluginLoader = options.facetLoader ?? createStaticFacetLoader([]);
let loadedPlugins = await pluginLoader.load();
let facetHost: FacetHost;
try {
facetHost = await createFacetHost({ facets: [...builtins.facets, ...loadedPlugins.facets] });
} catch (error) {
const cleanup = await Promise.allSettled([loadedPlugins.dispose(), builtins.dispose()]);
const cleanupErrors = cleanup.flatMap((result) => (result.status === "rejected" ? [result.reason] : []));
if (cleanupErrors.length > 0) {
throw new AggregateError([error, ...cleanupErrors], "Session facets failed to start and clean up");
}
throw error;
}
let reloadTail = Promise.resolve();
reloadPlugins = () => {
const operation = reloadTail.then(async () => {
const candidate = await pluginLoader.load();
try {
await facetHost.reload(candidate.facets);
} catch (error) {
try {
await candidate.dispose();
} catch (cleanupError) {
throw new AggregateError([error, cleanupError], "Session plugin reload and cleanup failed");
}
throw error;
}
const retired = loadedPlugins;
loadedPlugins = candidate;
await retired.dispose();
});
reloadTail = operation.catch(() => {});
return operation;
};
const provider = facetHost.services;
const endpoints = new Map<string, ScopedServiceEndpoint>();
const removeSubscriptions = (matches: (scope: WorkerServiceScope) => boolean): void => {
for (const [key, entry] of endpoints) {
if (!matches(entry.scope)) continue;
entry.endpoint.dispose();
endpoints.delete(key);
}
};
return {
invoke(call, scope, context) {
const key = serviceScopeKey(scope);
let entry = endpoints.get(key);
if (entry === undefined) {
entry = { scope, endpoint: createRemoteServiceEndpoint(provider) };
endpoints.set(key, entry);
}
return entry.endpoint.invoke(
call,
(subscriptionId, update) => options.publish(scope, subscriptionId, update),
context,
);
},
removeSubscriptions,
async dispose() {
removeSubscriptions(() => true);
await reloadTail;
const errors: unknown[] = [];
try {
await facetHost.dispose();
} catch (error) {
errors.push(error);
}
const results = await Promise.allSettled([loadedPlugins.dispose(), builtins.dispose()]);
errors.push(...results.flatMap((result) => (result.status === "rejected" ? [result.reason] : [])));
if (errors.length === 1) throw errors[0];
if (errors.length > 1) throw new AggregateError(errors, "Failed to dispose Session facets");
},
};
}
function serviceScopeKey(scope: WorkerServiceScope): string {
return `${scope.serverConnectionId}\0${scope.attachmentId}`;
}
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