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| 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 | 1x 1x 1x 11x 11x 11x 11x 11x 12x 12x 12x 11x 19x 19x 19x 11x 11x 19x 19x 19x 19x 11x 11x 1x 63x 63x 63x 63x 63x 63x 63x 62x 62x 62x 63x 73x 73x 73x 73x 63x 89x 89x 89x 63x 67x 67x 1x 1x 1x 67x 67x 67x 67x 67x 63x 63x | import type { Logger } from '../../../logger/definition.ts';
import { withLogger } from '../../../logger/off-logger.ts';
import { withPrefix } from '../../../logger/prefixed-logger.ts';
import type { InvocationKey } from '../definition.ts';
import type { AsyncStackStorage, InvocationStack } from './definition.ts';
/**
* Creates a basic invocation stack that tracks the nesting of invocation keys without support for multithread
* scenarios.
*
* This stack is used to track parent-child relationships between invocations by pushing the `InvocationKey` of each
* active function call and removing it after completion.
*
* This implementation is not thread-safe and is suitable for environments where each thread or event loop has its own
* isolated context (e.g., browser, single-threaded Node).
*
* @example
*
* ```ts
* const stack = createBasicInvocationStack({ logger });
* const tracker = createInvocationTracker({ stack });
* const fetchUser = tracker.track('fetchUser', fetchUserFn);
* await fetchUser('123');
* ```
*
* @param options - The options to use to create the stack.
* @returns A synchronous, in-memory invocation stack.
*/
export const createBasicInvocationStack = (options?: { readonly logger: Logger }): InvocationStack => {
const logger = withPrefix(withLogger(options?.logger), 'stack.basic', { fallbackPrefix: 'emitnlog.tracker' });
const stack: InvocationKey[] = [];
logger.d`creating stack`;
return {
close: () => {
logger.d`closing`;
stack.length = 0;
},
push: (key: InvocationKey) => {
logger.t`pushing key '${key.id}'`;
stack.push(key);
},
peek: () => stack.at(-1),
pop: () => {
const key = stack.pop();
logger.t`${key ? `popped key '${key.id}'` : 'no key to pop'}`;
return key;
},
};
};
/**
* Creates an invocation stack that uses a asynchronous storage to preserve the correct nesting of invocations across
* async calls, promises, and timers — making it the recommended implementation in Node.js environments.
*
* The stack is automatically scoped per async context, so values pushed in one async task will not leak into others.
*
* @example
*
* ```ts
* const storage = ...;
* const stack = createThreadSafeInvocationStack(storage, { logger });
* const tracker = createInvocationTracker({ stack });
* const fetchUser = tracker.track('fetchUser', fetchUserFn);
* await fetchUser('123');
* ```
*
* @returns A thread-safe `InvocationStack` for Node.js environments.
*/
export const createThreadSafeInvocationStack = (
storage: AsyncStackStorage,
options?: { readonly logger: Logger },
): InvocationStack => {
const logger = withPrefix(withLogger(options?.logger), 'stack.thread-safe', { fallbackPrefix: 'emitnlog.tracker' });
logger.d`creating stack`;
return {
close: () => {
logger.d`closing`;
storage.disable();
},
push: (key: InvocationKey) => {
logger.t`pushing key '${key.id}'`;
const current = storage.getStore() ?? [];
storage.enterWith([...current, key]);
},
peek: () => {
const current = storage.getStore();
return current?.at(-1);
},
pop: () => {
const current = storage.getStore();
if (!current?.length) {
logger.t`no key to pop`;
return undefined;
}
logger.t`popping key '${current.at(-1)?.id}'`;
const updated = current.slice(0, -1);
storage.enterWith(updated);
return current.at(-1);
},
};
};
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