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dryadjobmanager.go
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dryadjobmanager.go
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/*
* Copyright (c) 2017-2018 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
// File dryadjobmanager.go defines DryadJobManager interface and structures related to it.
package weles
import (
"crypto/rsa"
"net"
)
// DryadJobStatus is a representation of current state of DryadJob.
type DryadJobStatus string
const (
// DryadJobStatusNEW - initial status of DryadJob after call to Create.
DryadJobStatusNEW DryadJobStatus = "CREATED"
// DryadJobStatusDEPLOY - DryadJob is executing deploy section of job definition.
DryadJobStatusDEPLOY DryadJobStatus = "DEPLOYING"
// DryadJobStatusBOOT - DryadJob is executing boot section of job definition.
DryadJobStatusBOOT DryadJobStatus = "BOOTING"
// DryadJobStatusTEST - DryadJob is executing test section of job definition.
DryadJobStatusTEST DryadJobStatus = "EXECUTING TESTS"
// DryadJobStatusFAIL - an irrecoverable error has been encountered
// and execution had to be stopped early.
DryadJobStatusFAIL DryadJobStatus = "ERROR OCCURRED"
// DryadJobStatusOK - DryadJob has finished execution successfully.
DryadJobStatusOK DryadJobStatus = "DONE"
)
// DryadJobInfo contains information about DryadJob.
type DryadJobInfo struct {
Job JobID
Status DryadJobStatus
}
// DryadJobStatusChange is information passed on the channel to the caller of Create.
type DryadJobStatusChange DryadJobInfo
// Dryad contains information about device allocated for Job
// and credentials required to use it.
type Dryad struct {
// Addr is necessary information to connect to a tunnel to Dryad.
Addr net.Addr
// Key is private RSA key of the job session.
Key rsa.PrivateKey
// Username defines Dryad's account name.
Username string
}
// DryadJobFilter is used by List to access only jobs of interest.
//
// Job is matching DryadJobFilter if References contain value of
// its Job field and Statuses - Status.
type DryadJobFilter struct {
References []JobID
Statuses []DryadJobStatus
}
// DryadJobManager organizes running Jobs on allocated Dryad.
type DryadJobManager interface {
// Create starts execution of Job definition on allocated Dryad.
// Job's config is passed in order to avoid need to fetch it from Job Manager.
//
// JobID is used only to reference currently executing Jobs.
//
// Slow read from a channel may miss some events.
Create(JobID, Dryad, Config, chan<- DryadJobStatusChange) error
// Cancel stops DryadJob associated with Job.
//
// It has no effect if Cancel has been called before
// or job has already terminated.
Cancel(JobID) error
// List returns information about DryadJobs matching DryadJobFilter
// or all if it is not specified.
List(*DryadJobFilter) ([]DryadJobInfo, error)
}