VSAM example

index.js

const os = require('os');
const vsam = require('vsam.js');

const vsamDsn = os.userInfo().username + '.TEST.VSAM.KSDS';

const schema = {
    key: {
        type: "string",
        maxLength: 5
    },
    name: {
        type: "string",
        maxLength: 10
    },
    gender: {
        type: "string",
        maxLength: 10
    }
};

var file;

if (!vsam.exist(vsamDsn)) {
    console.log(`${vsamDsn} does not exist`);
    file = vsam.allocSync(vsamDsn, schema);
    console.log(`${vsamDsn} allocated`);
}
else {
    file = vsam.openSync(vsamDsn, schema);
}

file.read((record, err) => {
    if (record) {
        console.log("Record read", record);
        file.close((err) => {
            console.log("Error", err);
        });
    } else {
        console.log("Creating record");
        rec = {
            key: "00001",
            name: "Petr",
            gender: "male"
        };
        file.write(rec, (err) => {
            if (err) {
                console.log("Error", err);
            }
        });
    }
});