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geojson_query.go
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geojson_query.go
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/*
* Copyright 2012-2019 Aerospike, Inc.
*
* Portions may be licensed to Aerospike, Inc. under one or more contributor
* license agreements.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package main
import (
"log"
as "github.com/aerospike/aerospike-client-go"
"github.com/aerospike/aerospike-client-go/examples/shared"
)
func main() {
prepareExample(shared.Client)
runExample(shared.Client)
log.Println("Example finished successfully.")
}
func prepareExample(client *as.Client) {
// The Data
bins := []as.BinMap{
{
"name": "Bike Shop",
"demand": 17923,
"capacity": 17,
"coord": as.GeoJSONValue(`{"type" : "Point", "coordinates": [13.009318762,80.003157854]}`),
},
{
"name": "Residential Block",
"demand": 2429,
"capacity": 2974,
"coord": as.GeoJSONValue(`{"type" : "Point", "coordinates": [13.00961276, 80.003422154]}`),
},
{
"name": "Restaurant",
"demand": 49589,
"capacity": 4231,
"coord": as.GeoJSONValue(`{"type" : "Point", "coordinates": [13.009318762,80.003157854]}`),
},
{
"name": "Cafe",
"demand": 247859,
"capacity": 26,
"coord": as.GeoJSONValue(`{"type" : "Point", "coordinates": [13.00961276, 80.003422154]}`),
},
}
// write the records to the database
for i, b := range bins {
// define some bins
key, _ := as.NewKey(*shared.Namespace, *shared.Set, i)
err := client.Put(nil, key, b)
shared.PanicOnError(err)
}
log.Println("Sample records were written to the disk...")
// queries only work on indices; you should create the index only once
// The index is created on the namespace, set and bin that should be indexed.
client.CreateIndex(nil, *shared.Namespace, *shared.Set, "testset_geo_index", "coord", as.GEO2DSPHERE)
}
func runExample(client *as.Client) {
stm := as.NewStatement(*shared.Namespace, *shared.Set)
// there are multiple different types of filters. You can find the list in the docs.
stm.SetFilter(as.NewGeoWithinRadiusFilter("coord", float64(13.009318762), float64(80.003157854), float64(50000)))
recordset, err := client.Query(nil, stm)
shared.PanicOnError(err)
count := 0
for res := range recordset.Results() {
shared.PanicOnError(res.Err)
log.Println(res.Record.Bins)
count++
}
// 4 region should be found
log.Println("Records found:", count)
}