Paust-DB Client

godoc for client

Client Interface

// Client는 paust-db와 communicate하는 기본적인 client임
type Client interface {
	// Put는 InputDataObj slice의 데이터를 write하고 그 결과를 tendermint의 ResultBroadcastTxCommit로 return.
	Put(dataObjs []InputDataObj) (*ctypes.ResultBroadcastTxCommit, error)

	// Query는 InputQueryObj의 Start와 End사이에 있는 데이터의 metadata를 ResultABCIQuery에 담아서 return.
	// InputQueryObj에 OwnerId와 Qualifier가 명시된 경우 해당 OwnerId, Qualifier와 일치하는 데이터만을 read.
	// ResultABCIQuery.Response.Value에 실제 read한 데이터가 OutputQueryObj의 slice로 담겨있음.
	Query(queryObj InputQueryObj) (*ctypes.ResultABCIQuery, error)

	// Fetch는 InputFetchObj와 일치하는 데이터를 tendermint의 ResultABCIQuery에 담아서 return.
	// ResultABCIQuery.Response.Value에 실제 read한 데이터가 OutputFetchObj의 slice로 담겨있음.
	Fetch(fetchObj InputFetchObj) (*ctypes.ResultABCIQuery, error)
}

Example

paust-db client API를 사용하기 위해서는 client package를 import해야함

import "github.com/paust-team/paust-db/client"

Put(dataObjs []InputDataObj) (*ctypes.ResultBroadcastTxCommit, error)

Data (InputDataObj)

Name	Type	Description	Length
Timestamp	uint64	Unix timestamp(nanosec)	uint64
OwnerId	string	Data owner id	64 characters or below
Qualifier	string	Schemeless json string	Unlimited
Data	[]byte	Data to be stored	Unlimited

// Example
inputDataObjs := []client.InputDataObj{{Timestamp: uint64(time.Now().UnixNano()), OwnerId: ownerId, Qualifier: qualifier, Data: data}}
HTTPClient := client.NewHTTPClient("http://localhost:26657")
res, err := HTTPClient.Put(inputDataObjs)
if err != nil {
	fmt.Println(err)
	os.Exit(1)
}
if res.CheckTx.IsErr() {
	fmt.Println(res.CheckTx.Log)
	os.Exit(1)
} else if res.DeliverTx.IsErr() {
	fmt.Println(res.DeliverTx.Log)
	os.Exit(1)
}

Query(queryObj InputQueryObj) (*ctypes.ResultABCIQuery, error)

Data (InputQueryObj)

Name	Type	Description	Length
Start	uint64	Unix timestamp(nanosec)	uint64
End	uint64	Unix timestamp(nanosec)	uint64
OwnerId	string	Data owner id	64 characters or below
Qualifier	string	Schemeless json string	Unlimited

// Example
HTTPClient := client.NewHTTPClient("http://localhost:26657")
res, err := HTTPClient.Query(client.InputQueryObj{Start: start, End: end, OwnerId: ownerId, Qualifier: qualifier})
if err != nil {
	fmt.Println(err)
	os.Exit(1)
}
if res.Response.IsErr() {
	fmt.Println(res.Response.Log)
	os.Exit(1)
}

fmt.Println(string(res.Response.Value))

Fetch(fetchObj InputFetchObj) (*ctypes.ResultABCIQuery, error)

Data (InputFetchObj)

Name	Type	Description
Ids	[][]byte	Array of unique row ID

// Example
inputFetchObj := client.InputFetchObj{Ids: [][]byte{id1, id2, id3}}
HTTPClient := client.NewHTTPClient("http://localhost:26657")
res, err := HTTPClient.Fetch(inputFetchObj)
if err != nil {
	fmt.Println(err)
	os.Exit(1)
}
if res.Response.IsErr() {
	fmt.Println(res.Response.Log)
	os.Exit(1)
}

fmt.Println(string(res.Response.Value))

자세한 example은 client/cmd/paust-db-client/commands/client.go 참고

CLI usage

Paust-db-client install

paust-db의 put, query, fetch등의 기능을 쉽게 테스트 하기 위한 Client CLI 를 제공함

$ go get github.com/paust-team/paust-db/client/cmd/paust-db-client
$ paust-db-client
Paust DB Client Application

Usage:
  paust-db-client [command]

Available Commands:
  fetch       Fetch DB for real data
  help        Help about any command
  put         Put data to DB
  query       Query DB for metadata
  status      Check status of paust-db

Flags:
  -h, --help   help for paust-db-client

Use "paust-db-client [command] --help" for more information about a command.

Put data

paust-db-client put command 를 이용하여 여러 방법으로 데이터를 time series db에 쓸 수 있음 put data 구조는 client.InputDataObj 를 따름

JSON object Data

Name	Description	Length
timestamp	Essential. Unix timestamp(nanosec)	size of uint64
ownerId	Essential. Data owner id	64 characters or below
qualifier	Schemeless json string	Unlimited
data	Base64 encoded data	Unlimited

Stdin 방식 cli 상에서 client.InputDataObj형식을 가진 JSON object의 array를 사용하여 put 할 수 있음

# put data of STDIN
$ echo '[
        {"timestamp":1544772882435375000,"ownerId":"owner1","qualifier":"{\"type\":\"temperature\"}","data":"YWJj"},
        {"timestamp":1544772960049177000,"ownerId":"owner2","qualifier":"{\"type\":\"speed\"}","data":"ZGVm"},
        {"timestamp":1544772967331458000,"ownerId":"owner3","qualifier":"{\"type\":\"price\"}","data":"Z2hp"}
]' | paust-db-client put -s
Read json data from STDIN
put success.

File 방식 쓸 데이터가 많은 경우 File 을 통하여 put 할 수 있음 파일에 작성되는 data형태는 client.InputDataObj형식을 가진 JSON object의 array로 test/write_file.json 참고

# put data of file
$ paust-db-client put -f something_to_write.json
Read json data from file: something_to_write.json
put success.

Directory 방식 recursive option(-r)을 사용하여 nested directory를 탐색하여 file들을 찾아 put 할 수 있음

# put data of files in directory
$ paust-db-client put -d /root/writeDirectory -r
Read json data from files in directory: /root/writeDirectory
/root/wirteDirectory/test1.json: put success.
/root/wirteDirectory/test2.json: put success.
/root/wirteDirectory/recursiveDirectory/test3.json: put success.

Cli argument 방식 timestamp를 명시하지 않으면 현재 시간으로 timestamp가 설정됨.

# put data of cli arguments
$ paust-db-client put 6BM= -t 1552391844405076000 -o owner2 -q '{"type":"temperature"}'
Read data from cli arguments
put success.

기타 put 에 관련된 usage 를 --help 를 통해 확인할 수 있음

$ paust-db-client put --help
Put data to DB.
'data' is base64 encoded byte array.

Usage:
  paust-db-client put data [flags]

Flags:
  -d, --directory string       Directory path
  -e, --endpoint string        Endpoint of paust-db (default "localhost:26657")
  -f, --file string            File path
  -h, --help                   help for put
  -o, --ownerId string         Data Owner Id 64 characters or below
  -q, --qualifier string       Data qualifier(JSON object)
  -r, --recursive              Write all files and folders recursively
  -s, --stdin                  Input json data from standard input
  -t, --timestamp uint         Unix timestamp(in nanoseconds) (default 1552391845405076000)

Query data

paust-db-client query command 를 이용하여 start, end timestamp 사이에 있는 time series 데이터의 metadata를 가져올 수 있음 flag를 통해 ownerId, qualifier를 명시하면 특정 ownerId, qualifier와 일치하는 데이터만 가져 옴 query object 구조는 client.InputQueryObj 를 따름

start, end timestamp명시

# Query with start, end
$ paust-db-client query 1544772882435375000 1544772882435375001
query success.
[{"id":"eyJ0aW1lc3RhbXAiOjE1NDQ3NzI4ODI0MzUzNzUwMDAsInNhbHQiOjQ1fQ==","timestamp":1544772882435375000,"ownerId":"owner1","qualifier":"{\"type\":\"temperature\"}"}]

start, end timestamp와 ownerId 명시

# Query with start, end, ownerId
$ paust-db-client query 1544772882435375000 1544772967331458001 -o owner2
query success.
[{"id":"eyJ0aW1lc3RhbXAiOjE1NDQ3NzI5NjAwNDkxNzcwMDAsInNhbHQiOjIxNX0=","timestamp":1544772960049177000,"ownerId":"owner2","qualifier":"{\"type\":\"speed\"}"}]

start, end timestamp와 qualifier 명시

# Query with start, end, qualifier
$ paust-db-client query 1544772882435375000 1544772967331458001 -q '{"type":"price"}'
query success.
[{"id":"eyJ0aW1lc3RhbXAiOjE1NDQ3NzI5NjczMzE0NTgwMDAsInNhbHQiOjM5fQ==","timestamp":1544772967331458000,"ownerId":"owner3","qualifier":"{\"type\":\"price\"}"}]

start, end timestamp와 ownerId, qualifier 명시

# Query with start, end, ownerId, qualifier
$ paust-db-client query 1544772882435375000 1544772967331458001 -o owner2 -q '{"type":"speed"}'
query success.
[{"id":"eyJ0aW1lc3RhbXAiOjE1NDQ3NzI5NjAwNDkxNzcwMDAsInNhbHQiOjIxNX0=","timestamp":1544772960049177000,"ownerId":"owner2","qualifier":"{\"type\":\"speed\"}"}]

기타 query에 관련된 usage를 --help를 통해 확인할 수 있음

$ paust-db-client query --help
Query DB for metadata.
'start' and 'end' are unix timestamp in nanosecond.

Usage:
  paust-db-client query start end [flags]

Flags:
  -e, --endpoint string        Endpoint of paust-db (default "localhost:26657")
  -h, --help                   help for query
  -o, --ownerId string         Data Owner Id 64 characters or below
  -q, --qualifier string       Data qualifier(JSON object)

Fetch Data

paust-db-client fetch command 를 이용하여 여러 방법으로 time series db의 데이터를 읽을 수 있음 fetch object 구조는 client.InputFetchObj 를 따름

JSON object Data

Name	Description
ids	Array of Base64 encoded id.

STDIN 방식 cli 상에서 client.InputFetchObj형식을 가진 JSON object의 array를 사용하여 특정 id를 가진 데이터를 fetch 할 수 있음

# Fetch with STDIN
$ echo '{
  "ids":[
    "eyJ0aW1lc3RhbXAiOjE1NDQ3NzI4ODI0MzUzNzUwMDAsInNhbHQiOjQ1fQ==",
    "eyJ0aW1lc3RhbXAiOjE1NDQ3NzI5NjAwNDkxNzcwMDAsInNhbHQiOjIxNX0="
  ]
}' | paust-db-client fetch -s
Read json data from STDIN
fetch success.
[{"id":"eyJ0aW1lc3RhbXAiOjE1NDQ3NzI4ODI0MzUzNzUwMDAsInNhbHQiOjQ1fQ==","timestamp":1544772882435375000,"data":"YWJj"},{"id":"eyJ0aW1lc3RhbXAiOjE1NDQ3NzI5NjAwNDkxNzcwMDAsInNhbHQiOjIxNX0=","timestamp":1544772960049177000,"data":"ZGVm"}]

File 방식 읽을 데이터가 많은 경우 File 을 통하여 특정 id를 가진 데이터를 fetch 할 수 있음 파일에 작성되는 data형태는 client.InputFetchObj형식을 가진 JSON object의 array로 test/read_file.json 참고

# Fetch with file
$ paust-db-client fetch -f ids_to_read.json
Read json data from file: ids_to_read.json
fetch success.
[{"id":"eyJ0aW1lc3RhbXAiOjE1NDQ3NzI4ODI0MzUzNzUwMDAsInNhbHQiOjQ1fQ==","timestamp":1544772882435375000,"data":"YWJj"}]

Cli argument 방식

# Fetch with cli arguments
$ paust-db-client fetch eyJ0aW1lc3RhbXAiOjE1NDQ3NzI4ODI0MzUzNzUwMDAsInNhbHQiOjQ1fQ== eyJ0aW1lc3RhbXAiOjE1NDQ3NzI5NjAwNDkxNzcwMDAsInNhbHQiOjIxNX0=
Read data from cli arguments
fetch success.
[{"id":"eyJ0aW1lc3RhbXAiOjE1NDQ3NzI4ODI0MzUzNzUwMDAsInNhbHQiOjQ1fQ==","timestamp":1544772882435375000,"data":"YWJj"},{"id":"eyJ0aW1lc3RhbXAiOjE1NDQ3NzI5NjAwNDkxNzcwMDAsInNhbHQiOjIxNX0=","timestamp":1544772960049177000,"data":"ZGVm"}]

기타 fetch에 관련된 usage를 --help를 통해 확인할 수 있음

$ paust-db-client fetch --help
Fetch DB for real data.
'id' is a base64 encoded byte array.

Usage:
  paust-db-client fetch [id...] [flags]

Flags:
  -e, --endpoint string   Endpoint of paust-db (default "localhost:26657")
  -f, --file string       File path
  -h, --help              help for fetch
  -s, --stdin             Input json data from standard input

Check status of paust-db

paust-db-client status command 를 이용하여 paust-db의 health를 체크할 수 있음

$ paust-db-client status -e localhost:26657
running

$ paust-db-client status --help
Check status of paust-db

Usage:
  paust-db-client status [flags]

Flags:
  -e, --endpoint string   Endpoint of paust-db (default "localhost:26657")
  -h, --help              help for status

# Packages

# README

Paust-DB Client

Client Interface

Example

Put(dataObjs []InputDataObj) (*ctypes.ResultBroadcastTxCommit, error)

Data (InputDataObj)

Query(queryObj InputQueryObj) (*ctypes.ResultABCIQuery, error)

Data (InputQueryObj)

Fetch(fetchObj InputFetchObj) (*ctypes.ResultABCIQuery, error)

Data (InputFetchObj)

CLI usage

Paust-db-client install

Put data

JSON object Data

Query data

Fetch Data

JSON object Data

Check status of paust-db