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Datastore Connectivity for Aerospike (asc)

Datastore Connectivity library for Aerospike in Go. GoDoc

This library is compatible with Go 1.11+

Please refer to CHANGELOG.md if you encounter breaking changes.

Configuration parameters

aerospike client/policy config params
  • timeoutMs
  • connectionTimeout
  • serverSocketTimeout
  • scanPct
  • host
  • port
  • namespace
  • sleepBetweenRetries
  • batchSize
keyColumn, keyColumnName

Defines name of column used as record key ('id' by default)

It can be specified per table i.e

events.keyColumn = code
excludedColumns

List of columns to be excluded from record (i.e: id - in case we need it only as record key)

dateFormat

ISO date format used to time.Time conversion

optimizeLargeScan

Experimental feature that first scan all keys and write then to disk and then separate go routines scan data using the dumped keys

You can only specify scanBaseDirectory

Usage:

The following is a very simple example of CRUD operations with dsc

config.yaml

driverName: aerospike
parameters:
  namespace: test
  host: 127.0.0.1
  dateFormat: yyyy-MM-dd hh:mm:ss
package main

import (
    _ "github.com/aerospike/aerospike-client-go"
    _ "github.com/viant/asc"
    "github.com/viant/dsc"
    "log"
)


type Interest struct {
	Id int	`autoincrement:"true"`
	Name string
	ExpiryTimeInSecond int `column:"expiry"`
	Category string
}


func main() {


	config, err := dsc.NewConfigFromURL("config.yaml")
	if err != nil {
		log.Fatal(err)
	}
	factory := dsc.NewManagerFactory()
	manager, err := factory.Create(config)
	if err != nil {
		log.Fatal(err)
	}



  	// manager := factory.CreateFromURL("file:///etc/myapp/datastore.json")
  
    interest := &Interest{}
    
    success, err:= manager.ReadSingle(interest, "SELECT id, name, expiry, category FROM interests WHERE id = ?", []interface{}{id},nil)
	if err != nil {
        panic(err.Error())
	}

    var intersts = make([]*Interest, 0)
    err = manager.ReadAll(&intersts, "SELECT id, name, expiry, category FROM interests", nil ,nil)
    if err != nil {
        panic(err.Error())
    }

    
    intersts = []*Interest {
        Interest{Name:"Abc", ExpiryTimeInSecond:3600, Category:"xyz"},
        Interest{Name:"Def", ExpiryTimeInSecond:3600, Category:"xyz"},
        Interest{Id:"20, Name:"Ghi", ExpiryTimeInSecond:3600, Category:"xyz"},
    }


	_, _, err = manager.PersistAll(&intersts, "intersts", nil)
	if err != nil {
        panic(err.Error())
   	}
   	fmt.Printf("Inserted %v, updated: %v\n", inserted, updated)
  
    deleted, err := manager.DeleteAll(&intersts, "intersts", nil)
    if err != nil {
        panic(err.Error())
   	}
 	fmt.Printf("Inserted %v, updated: %v\n", deleted)


 	
 	var records = []map[string]interface{}{}
 	 err = manager.ReadAll(&records, "SELECT id, name, expiry, category FROM interests", nil ,nil)
    if err != nil {
        panic(err.Error())
    }
}

Query level UDF support

  • ARRAY converts supplied source column into collection of map entry defined as (key, value)
SELECT 
  id, 
  username, 
ARRAY(city_visited) AS visited
FROM users
  • JSON convert supplied source column to JSON
SELECT 
  id, 
  username, 
JSON(city_visited) AS visited
FROM users

GoCover

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License

The source code is made available under the terms of the Apache License, Version 2, as stated in the file LICENSE.

Individual files may be made available under their own specific license, all compatible with Apache License, Version 2. Please see individual files for details.

Credits and Acknowledgements

Library Author: Adrian Witas

Contributors:

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