synapse-storage/dist/core/storage/middlewares/sync-storage-batching.middleware.js

Набор инструментов для управления состоянием и апи-запросами

const syncBatchingMiddleware = (options = {})=>{
    const batchSize = options.batchSize ?? 10;
    let queue = [];
    let scheduled = false;
    const shouldBatch = (action)=>{
        return action.type === 'set' || action.type === 'update';
    };
    const mergeActions = (actions)=>{
        const merged = new Map();
        for (const action of actions){
            const key = `${action.type}_${action.key?.toString() || 'default'}`;
            merged.set(key, action);
        }
        return Array.from(merged.values());
    };
    const flushQueue = (api, next)=>{
        if (queue.length === 0) return;
        const batch = queue.splice(0);
        const mergedActions = mergeActions(batch);
        for (const action of mergedActions){
            next(action);
        }
    };
    return {
        name: 'sync-batching',
        setup: ()=>{},
        cleanup: ()=>{
            queue = [];
            scheduled = false;
        },
        reducer: (api)=>(next)=>(action)=>{
                    if (!shouldBatch(action)) {
                        return next(action);
                    }
                    queue.push(action);
                    if (queue.length >= batchSize) {
                        flushQueue(api, next);
                    } else if (!scheduled) {
                        scheduled = true;
                        queueMicrotask(()=>{
                            scheduled = false;
                            flushQueue(api, next);
                        });
                    }
                    // Возвращаем текущее значение из кеша (операция ещё не выполнена если в очереди)
                    if (action.type === 'set' && action.key) {
                        return action.value;
                    }
                    return undefined;
                }
    };
};

export { syncBatchingMiddleware };

//# sourceMappingURL=sync-storage-batching.middleware.js.map