Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | 1x 1x 1x 1x 1x 1x 4x 4x 4x 4x 4x | import * as util from "util";
import {Logger} from "../../../logger";
import {IRequest} from "../../../server/request";
import {DataType} from "../../data/data-type";
import {Database} from "../../data/database";
import {DatabaseValue} from "../../data/database-value";
import {RedisToken} from "../../protocol/redis-token";
import {IRespCommand} from "../resp-command";
interface IParameters {
ifExists: boolean;
ifNotExists: boolean;
ttl: number | null;
}
/**
* ### Available since 1.0.0.
* ### SETNX key value
*
* Set key to hold string value if key does not exist. In that case, it is equal to SET. When
* key already holds a value, no operation is performed. SETNX is short for "SET if Not eXists".
*
* ### Return value
* Integer reply, specifically:
* - 1 if the key was set
* - 0 if the key was not set
* ### Examples
* ```
* redis> SETNX mykey "Hello"
* (integer) 1
* redis> SETNX mykey "World"
* (integer) 0
* redis> GET mykey
* "Hello"
* redis>
* ```
*/
export class SetNxCommand extends IRespCommand {
dbDataType = DataType.STRING
maxParams = 2
minParams = 2
name = "setnx"
private logger: Logger = new Logger(module.id);
public execSync(request: IRequest, db: Database): RedisToken {
this.logger.debug(
`${request.getCommand()}.execute(%s)`,
...request.getParams()
);
const key: string = request.getParam(0);
if (db.exists(key)) {
this.logger.debug(`Key ${key} already exists`);
return RedisToken.integer(0);
}
const value: string = request.getParam(1);
this.logger.debug(`Setting Key ${key} to ${value}`);
db.put(
key,
new DatabaseValue(
DataType.STRING,
value
)
);
return RedisToken.integer(1);
}
}
|