Mercurial > gemma
view pkg/controllers/diff.go @ 2570:c4242b9d59fe
Morphological differences: Added endpoint stub POST /api/diff
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
---|---|
date | Mon, 11 Mar 2019 13:15:28 +0100 |
parents | |
children | 7686c7c23506 |
line wrap: on
line source
// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018, 2019 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package controllers import ( "database/sql" "fmt" "log" "net/http" "time" "golang.org/x/sync/semaphore" "gemma.intevation.de/gemma/pkg/common" "gemma.intevation.de/gemma/pkg/models" "gemma.intevation.de/gemma/pkg/octree" ) // Only allow three diffence calculation at once. // TODO: Make this configurable? var diffCalculationSemaphore = semaphore.NewWeighted(int64(3)) func diffCalculation( input interface{}, req *http.Request, conn *sql.Conn, ) (jr JSONResult, err error) { start := time.Now() ctx := req.Context() // DoS counter measure. if err = diffCalculationSemaphore.Acquire(ctx, 1); err != nil { return } defer diffCalculationSemaphore.Release(1) dci := input.(models.DiffCalculationInput) minuendTree, err := octree.FromCache( ctx, conn, dci.Bottleneck, dci.Minuend.Time) log.Printf("info: loading minuend octree took %s\n", time.Since(start)) if err != nil { return } if minuendTree == nil { err = JSONError{ Code: http.StatusNotFound, Message: fmt.Sprintf("Cannot find survey for %s/%s.", dci.Bottleneck, dci.Minuend.Format(common.DateFormat)), } return } start = time.Now() subtrahendTree, err := octree.FromCache( ctx, conn, dci.Bottleneck, dci.Subtrahend.Time) log.Printf("info: loading subtrahend octree took %s\n", time.Since(start)) if err != nil { return } if subtrahendTree == nil { err = JSONError{ Code: http.StatusNotFound, Message: fmt.Sprintf("Cannot find survey for %s/%s.", dci.Bottleneck, dci.Subtrahend.Format(common.DateFormat)), } return } // TODO: Implement me! return }