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//! Interfaces for building [docker](https://www.docker.com/) containers
extern crate rustc_serialize;
extern crate jed;
extern crate url;
use self::super::{Docker, Result};
use self::super::transport::Body;
use self::super::rep::{ContainerCreateInfo, Event};
use self::super::rep::Container as ContainerRep;
use std::collections::{BTreeMap, HashMap};
use rustc_serialize::json::{self, Json, ToJson};
use url::form_urlencoded;
/// Interface for building container list request
pub struct ContainerListBuilder<'a> {
docker: &'a Docker,
params: HashMap<&'static str, String>,
}
pub enum ContainerFilter {
ExitCode(u64),
Status(String),
LabelName(String),
Label(String, String)
}
impl<'a> ContainerListBuilder<'a> {
pub fn new(docker: &'a Docker) -> ContainerListBuilder<'a> {
ContainerListBuilder {
docker: docker,
params: HashMap::new(),
}
}
pub fn filter(&mut self, filters: Vec<ContainerFilter>) -> &mut ContainerListBuilder<'a> {
let mut param = HashMap::new();
for f in filters {
match f {
ContainerFilter::ExitCode(c) => param.insert("exit", vec![c.to_string()]),
ContainerFilter::Status(s) => param.insert("status", vec![s]),
ContainerFilter::LabelName(n) => param.insert("label", vec![n]),
ContainerFilter::Label(n,v) => param.insert("label", vec![format!("{}={}", n, v)])
};
}
// structure is a a json encoded object mapping string keys to a list
// of string values
self.params.insert("filters", json::encode(¶m).unwrap());
self
}
pub fn all(&mut self) -> &mut ContainerListBuilder<'a> {
self.params.insert("all", "true".to_owned());
self
}
pub fn since(&mut self, since: &str) -> &mut ContainerListBuilder<'a> {
self.params.insert("since", since.to_owned());
self
}
pub fn before(&mut self, before: &str) -> &mut ContainerListBuilder<'a> {
self.params.insert("before", before.to_owned());
self
}
pub fn sized(&mut self) -> &mut ContainerListBuilder<'a> {
self.params.insert("size", "true".to_owned());
self
}
pub fn build(&self) -> Result<Vec<ContainerRep>> {
let mut path = vec!["/containers/json".to_owned()];
if !self.params.is_empty() {
let encoded = form_urlencoded::serialize(&self.params);
path.push(encoded)
}
let raw = try!(self.docker.get(&path.join("?")));
Ok(try!(json::decode::<Vec<ContainerRep>>(&raw)))
}
}
/// Interface for building a new docker container from an existing image
pub struct ContainerBuilder<'a, 'b> {
docker: &'a Docker,
image: &'b str,
hostname: Option<String>,
user: Option<String>,
memory: Option<u64>,
}
impl<'a, 'b> ContainerBuilder<'a, 'b> {
pub fn new(docker: &'a Docker, image: &'b str) -> ContainerBuilder<'a, 'b> {
ContainerBuilder {
docker: docker,
image: image,
hostname: None,
user: None,
memory: None,
}
}
pub fn hostname(&mut self, h: &str) -> &mut ContainerBuilder<'a, 'b> {
self.hostname = Some(h.to_owned());
self
}
pub fn user(&mut self, u: &str) -> &mut ContainerBuilder<'a, 'b> {
self.user = Some(u.to_owned());
self
}
pub fn build(&self) -> Result<ContainerCreateInfo> {
let mut body = BTreeMap::new();
body.insert("Image".to_owned(), self.image.to_json());
let json_obj: Json = body.to_json();
let data = try!(json::encode(&json_obj));
let mut bytes = data.as_bytes();
let raw = try!(self.docker.post("/containers/create",
Some(Body::new(&mut Box::new(&mut bytes),
bytes.len() as u64))));
Ok(try!(json::decode::<ContainerCreateInfo>(&raw)))
}
}
/// Interface for buiding an events request
pub struct EventsBuilder<'a, 'b, 'c> {
docker: &'a Docker,
since: Option<&'b u64>,
until: Option<&'c u64>,
}
impl<'a, 'b, 'c> EventsBuilder<'a, 'b, 'c> {
pub fn new(docker: &'a Docker) -> EventsBuilder<'a, 'b, 'c> {
EventsBuilder {
docker: docker,
since: None,
until: None,
}
}
/// Filter events since a given timestamp
pub fn since(&mut self, ts: &'b u64) -> &mut EventsBuilder<'a, 'b, 'c> {
self.since = Some(ts);
self
}
/// Filter events until a given timestamp
pub fn until(&mut self, ts: &'c u64) -> &mut EventsBuilder<'a, 'b, 'c> {
self.until = Some(ts);
self
}
/// Returns an interator over streamed docker events
pub fn build(&self) -> Result<Box<Iterator<Item = Event>>> {
let mut params = Vec::new();
if let Some(s) = self.since {
params.push(("since", s.to_string()));
}
if let Some(u) = self.until {
params.push(("until", u.to_string()));
}
let mut path = vec!["/events".to_owned()];
if !params.is_empty() {
let encoded = form_urlencoded::serialize(params);
path.push(encoded)
}
let raw = try!(self.docker.stream_get(&path.join("?")[..]));
let it = jed::Iter::new(raw).into_iter().map(|j| {
// fixme: better error handling
let s = json::encode(&j).unwrap();
json::decode::<Event>(&s).unwrap()
});
Ok(Box::new(it))
}
}
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