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swf_saver.go
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swf_saver.go
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// Copyright 2018 Google LLC
//
// 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.
package worker
import (
"github.com/kubeflow/pipelines/backend/src/agent/persistence/client"
"github.com/kubeflow/pipelines/backend/src/common/util"
log "github.com/sirupsen/logrus"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
)
// ScheduledWorkflowSaver provides a function to persist a workflow to a database.
type ScheduledWorkflowSaver struct {
client client.ScheduledWorkflowClientInterface
pipelineClient client.PipelineClientInterface
}
func NewScheduledWorkflowSaver(
client client.ScheduledWorkflowClientInterface,
pipelineClient client.PipelineClientInterface) *ScheduledWorkflowSaver {
return &ScheduledWorkflowSaver{
client: client,
pipelineClient: pipelineClient,
}
}
func (c *ScheduledWorkflowSaver) Save(key string, namespace string, name string, nowEpoch int64) error {
// Get the ScheduledWorkflow with this namespace/name
swf, err := c.client.Get(namespace, name)
isNotFound := util.HasCustomCode(err, util.CUSTOM_CODE_NOT_FOUND)
if err != nil && isNotFound {
// Permanent failure.
// The ScheduledWorkflow may no longer exist, we stop processing and do not retry.
return util.NewCustomError(err, util.CUSTOM_CODE_PERMANENT,
"ScheduledWorkflow (%s) in work queue no longer exists: %v", key, err)
}
if err != nil && !isNotFound {
// Transient failure, we will retry.
return util.NewCustomError(err, util.CUSTOM_CODE_TRANSIENT,
"ScheduledWorkflow (%s): transient failure: %v", key, err)
}
// Save this Scheduled Workflow to the database.
err = c.pipelineClient.ReportScheduledWorkflow(swf)
retry := util.HasCustomCode(err, util.CUSTOM_CODE_TRANSIENT)
// Failure
if err != nil && retry {
return util.NewCustomError(err, util.CUSTOM_CODE_TRANSIENT,
"Syncing ScheduledWorkflow (%v): transient failure: %v", name, err)
}
if err != nil && !retry {
return util.NewCustomError(err, util.CUSTOM_CODE_PERMANENT,
"Syncing ScheduledWorkflow (%v): permanent failure: %v", name, err)
}
// Success
log.WithFields(log.Fields{
"ScheduledWorkflow": name,
}).Infof("Syncing ScheduledWorkflow (%v): success, processing complete.", name)
return nil
}