rlink 0.6.16

High performance Stream Processing Framework
Documentation 
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use std::sync::Arc;

use crate::core::cluster::TaskResourceInfo;
use crate::core::env::{StreamApp, StreamExecutionEnvironment};
use crate::core::runtime::ClusterDescriptor;
#[cfg(feature = "k8s")]
use crate::deployment::kubernetes::KubernetesResourceManager;
use crate::deployment::local::LocalResourceManager;
use crate::deployment::standalone::StandaloneResourceManager;
use crate::deployment::yarn::YarnResourceManager;
use crate::runtime::context::Context;
use crate::runtime::ClusterMode;

#[cfg(feature = "k8s")]
pub mod kubernetes;
pub mod local;
pub mod standalone;
pub mod yarn;

pub struct Resource {
    memory: u32,
    cpu_cores: u32,
}

impl Resource {
    pub fn new(memory: u32, cpu_cores: u32) -> Self {
        Resource { memory, cpu_cores }
    }
}

pub(crate) trait TResourceManager {
    fn prepare(&mut self, context: &Context, job_descriptor: &ClusterDescriptor);

    /// worker resource allocate
    /// Return a resource location.
    fn worker_allocate<S>(
        &self,
        stream_app: &S,
        stream_env: &StreamExecutionEnvironment,
    ) -> anyhow::Result<Vec<TaskResourceInfo>>
    where
        S: StreamApp + 'static;

    fn stop_workers(&self, task_ids: Vec<TaskResourceInfo>) -> anyhow::Result<()>;
}

pub(crate) enum ResourceManager {
    LocalResourceManager(LocalResourceManager),
    StandaloneResourceManager(StandaloneResourceManager),
    YarnResourceManager(YarnResourceManager),
    #[cfg(feature = "k8s")]
    KubernetesResourceManager(KubernetesResourceManager),
}

impl ResourceManager {
    pub fn new(context: Arc<Context>) -> Self {
        match context.cluster_mode {
            ClusterMode::Local => {
                ResourceManager::LocalResourceManager(LocalResourceManager::new(context.clone()))
            }
            ClusterMode::Standalone => ResourceManager::StandaloneResourceManager(
                StandaloneResourceManager::new(context.clone()),
            ),
            ClusterMode::YARN => {
                ResourceManager::YarnResourceManager(YarnResourceManager::new(context.clone()))
            }
            #[cfg(feature = "k8s")]
            ClusterMode::Kubernetes => ResourceManager::KubernetesResourceManager(
                KubernetesResourceManager::new(context.clone()),
            ),
            #[cfg(not(feature = "k8s"))]
            ClusterMode::Kubernetes => unimplemented!(),
        }
    }
}

impl TResourceManager for ResourceManager {
    fn prepare(&mut self, context: &Context, job_descriptor: &ClusterDescriptor) {
        match self {
            ResourceManager::LocalResourceManager(rm) => rm.prepare(context, job_descriptor),
            ResourceManager::StandaloneResourceManager(rm) => rm.prepare(context, job_descriptor),
            ResourceManager::YarnResourceManager(rm) => rm.prepare(context, job_descriptor),
            #[cfg(feature = "k8s")]
            ResourceManager::KubernetesResourceManager(rm) => rm.prepare(context, job_descriptor),
        }
    }

    fn worker_allocate<S>(
        &self,
        stream_app: &S,
        stream_env: &StreamExecutionEnvironment,
    ) -> anyhow::Result<Vec<TaskResourceInfo>>
    where
        S: StreamApp + 'static,
    {
        match self {
            ResourceManager::LocalResourceManager(rm) => rm.worker_allocate(stream_app, stream_env),
            ResourceManager::StandaloneResourceManager(rm) => {
                rm.worker_allocate(stream_app, stream_env)
            }
            ResourceManager::YarnResourceManager(rm) => rm.worker_allocate(stream_app, stream_env),
            #[cfg(feature = "k8s")]
            ResourceManager::KubernetesResourceManager(rm) => {
                rm.worker_allocate(stream_app, stream_env)
            }
        }
    }

    fn stop_workers(&self, task_ids: Vec<TaskResourceInfo>) -> anyhow::Result<()> {
        match self {
            ResourceManager::LocalResourceManager(rm) => rm.stop_workers(task_ids),
            ResourceManager::StandaloneResourceManager(rm) => rm.stop_workers(task_ids),
            ResourceManager::YarnResourceManager(rm) => rm.stop_workers(task_ids),
            #[cfg(feature = "k8s")]
            ResourceManager::KubernetesResourceManager(rm) => rm.stop_workers(task_ids),
        }
    }
}