mirror of
https://github.com/NVIDIA/dgx-spark-playbooks.git
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106 lines
3.7 KiB
TypeScript
106 lines
3.7 KiB
TypeScript
//
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// SPDX-FileCopyrightText: Copyright (c) 1993-2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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import { NextRequest, NextResponse } from 'next/server';
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import remoteBackend from '@/lib/remote-backend';
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import type { Triple } from '@/types/graph';
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import { getGraphDbType } from '../settings/route';
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/**
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* Remote backend API that provides endpoints for creating and querying a knowledge graph
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* using the selected graph database, Pinecone, and SentenceTransformer
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*/
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/**
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* Create a backend from triples
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*/
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export async function POST(request: NextRequest) {
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try {
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const { triples } = await request.json();
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if (!triples || !Array.isArray(triples) || triples.length === 0) {
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return NextResponse.json(
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{ error: 'Triples are required and must be a non-empty array' },
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{ status: 400 }
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);
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}
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// Initialize backend with the selected graph database type
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if (!remoteBackend.isInitialized()) {
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const graphDbType = getGraphDbType();
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console.log(`Initializing backend with graph DB type: ${graphDbType}`);
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await remoteBackend.initialize(graphDbType);
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}
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// Create backend from triples
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await remoteBackend.createBackendFromTriples(triples);
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return NextResponse.json({
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success: true,
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message: `Created backend successfully with ${triples.length} triples`,
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graphDbType: getGraphDbType()
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});
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} catch (error) {
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console.error('Error creating backend from triples:', error);
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const errorMessage = error instanceof Error ? error.message : 'Unknown error';
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return NextResponse.json({ error: errorMessage }, { status: 500 });
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}
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}
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/**
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* Query the backend with a given query text
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*/
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export async function GET(request: NextRequest) {
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try {
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const url = new URL(request.url);
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const query = url.searchParams.get('query');
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if (!query) {
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return NextResponse.json({ error: 'Query parameter is required' }, { status: 400 });
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}
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// Parse optional parameters with fallbacks
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const kNeighbors = parseInt(url.searchParams.get('kNeighbors') || '4096', 10);
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const fanout = parseInt(url.searchParams.get('fanout') || '400', 10);
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const numHops = parseInt(url.searchParams.get('numHops') || '2', 10);
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// Initialize backend with the selected graph database type
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if (!remoteBackend.isInitialized()) {
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const graphDbType = getGraphDbType();
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console.log(`Initializing backend with graph DB type: ${graphDbType}`);
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await remoteBackend.initialize(graphDbType);
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}
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// Query the backend
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const relevantTriples = await remoteBackend.query(query, kNeighbors, fanout, numHops);
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return NextResponse.json({
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query,
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triples: relevantTriples,
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count: relevantTriples.length,
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parameters: {
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kNeighbors,
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fanout,
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numHops
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},
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graphDbType: getGraphDbType()
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});
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} catch (error) {
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console.error('Error querying backend:', error);
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const errorMessage = error instanceof Error ? error.message : 'Unknown error';
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return NextResponse.json({ error: errorMessage }, { status: 500 });
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}
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}
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