Connecting to the Default Server

Some libraries also provide a special way to connect to a default url, which is generally nats://localhost:4222:

Go
Java
JavaScript
Python
Ruby
TypeScript
C
Go
nc, err := nats.Connect(nats.DefaultURL)
if err != nil {
log.Fatal(err)
}
defer nc.Close()
// Do something with the connection
Java
Connection nc = Nats.connect();
// Do something with the connection
nc.close();
JavaScript
let nc = NATS.connect();
nc.on('connect', (c) => {
// Do something with the connection
doSomething();
// When done close it
nc.close();
});
nc.on('error', (err) => {
failed(err);
});
Python
nc = NATS()
await nc.connect()
# Do something with the connection
await nc.close()
Ruby
require 'nats/client'
NATS.start do |nc|
# Do something with the connection
# Close the connection
nc.close
end
TypeScript
// will throw an exception if connection fails
let nc = await connect();
// Do something with the connection
// When done close it
nc.close();
// alternatively, you can use the Promise pattern
let nc1: Client;
connect()
.then((c) => {
nc1 = c;
// Do something with the connection
nc1.close();
});
// add a .catch/.finally
C
natsConnection *conn = NULL;
natsStatus s;
s = natsConnection_ConnectTo(&conn, NATS_DEFAULT_URL);
if (s != NATS_OK)
// handle error
// Destroy connection, no-op if conn is NULL.
natsConnection_Destroy(conn);
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