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//
// Copyright (c) 2020-2022 science+computing ag and other contributors
//
// This program and the accompanying materials are made
// available under the terms of the Eclipse Public License 2.0
// which is available at https://www.eclipse.org/legal/epl-2.0/
//
// SPDX-License-Identifier: EPL-2.0
//
use std::str::FromStr;
use anyhow::Error;
use anyhow::Result;
use clap::ArgMatches;
use diesel::pg::PgConnection;
use diesel::prelude::*;
use getset::Getters;
use log::debug;
use crate::config::Configuration;
#[derive(Getters)]
pub struct DbConnectionConfig<'a> {
#[getset(get = "pub")]
database_host: &'a str,
#[getset(get = "pub")]
database_port: u16,
#[getset(get = "pub")]
database_user: &'a str,
#[getset(get = "pub")]
database_password: &'a str,
#[getset(get = "pub")]
database_name: &'a str,
#[getset(get = "pub")]
database_connection_timeout: u16,
}
impl<'a> std::fmt::Debug for DbConnectionConfig<'a> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
write!(f, "postgres://{user}:PASSWORD@{host}:{port}/{name}?connect_timeout={timeout}",
host = self.database_host,
port = self.database_port,
user = self.database_user,
name = self.database_name,
timeout = self.database_connection_timeout
)
}
}
impl<'a> DbConnectionConfig<'a> {
pub fn parse(config: &'a Configuration, cli: &'a ArgMatches) -> Result<DbConnectionConfig<'a>> {
Ok(DbConnectionConfig {
database_host: cli.value_of("database_host").unwrap_or_else(|| config.database_host()),
database_port: {
cli.value_of("database_port")
.map(u16::from_str)
.transpose()?
.unwrap_or_else(|| *config.database_port())
},
database_user: cli.value_of("database_user").unwrap_or_else(|| config.database_user()),
database_password: cli.value_of("database_password").unwrap_or_else(|| config.database_password()),
database_name: cli.value_of("database_name").unwrap_or_else(|| config.database_name()),
database_connection_timeout: {
cli.value_of("database_connection_timeout")
.map(u16::from_str)
.transpose()?
.unwrap_or_else( || {
// hardcoded default of 30 seconds database timeout
config.database_connection_timeout().unwrap_or(30)
})
},
})
}
pub fn establish_connection(self) -> Result<PgConnection> {
debug!("Trying to connect to database: {:?}", self);
let database_uri: String = format!(
"postgres://{user}:{password}@{host}:{port}/{name}?connect_timeout={timeout}",
host = self.database_host,
port = self.database_port,
user = self.database_user,
password = self.database_password,
name = self.database_name,
timeout = self.database_connection_timeout,
);
PgConnection::establish(&database_uri).map_err(Error::from)
}
}
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