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client.go
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client.go
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// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package canary
import (
"context"
"time"
"github.com/opentracing/opentracing-go"
"go.uber.org/cadence/.gen/go/cadence/workflowserviceclient"
"go.uber.org/cadence/.gen/go/shared"
"go.uber.org/cadence/activity"
"go.uber.org/cadence/client"
"go.uber.org/cadence/workflow"
)
// cadenceClient is an abstraction on top of
// the cadence library client that serves as
// a union of all the client interfaces that
// the library exposes
type cadenceClient struct {
Domain string
client.Client
// domainClient only exposes domain API
client.DomainClient
// this is the service needed to start the workers
Service workflowserviceclient.Interface
}
// createDomain creates a cadence domain with the given name and description
// if the domain already exist, this method silently returns success
func (client *cadenceClient) createDomain(name string, desc string, owner string, archivalStatus *shared.ArchivalStatus, isGlobalDomain bool, clusters []string) error {
emitMetric := true
retention := int32(workflowRetentionDays)
if archivalStatus != nil && *archivalStatus == shared.ArchivalStatusEnabled {
retention = int32(0)
}
var clusterCfg []*shared.ClusterReplicationConfiguration
for i := range clusters {
clusterCfg = append(clusterCfg, &shared.ClusterReplicationConfiguration{
ClusterName: &clusters[i],
})
}
req := &shared.RegisterDomainRequest{
Name: &name,
Description: &desc,
OwnerEmail: &owner,
Clusters: clusterCfg,
WorkflowExecutionRetentionPeriodInDays: &retention,
EmitMetric: &emitMetric,
HistoryArchivalStatus: archivalStatus,
VisibilityArchivalStatus: archivalStatus,
IsGlobalDomain: &isGlobalDomain,
}
err := client.Register(context.Background(), req)
if err != nil {
if _, ok := err.(*shared.DomainAlreadyExistsError); !ok {
return err
}
}
return nil
}
// newCadenceClient builds a cadenceClient from the runtimeContext
func newCadenceClient(domain string, runtime *RuntimeContext) cadenceClient {
tracer := opentracing.GlobalTracer()
cclient := client.NewClient(
runtime.service,
domain,
&client.Options{
MetricsScope: runtime.metrics,
Tracer: tracer,
},
)
domainClient := client.NewDomainClient(
runtime.service,
&client.Options{
MetricsScope: runtime.metrics,
Tracer: tracer,
},
)
return cadenceClient{
Domain: domain,
Client: cclient,
DomainClient: domainClient,
Service: runtime.service,
}
}
// newWorkflowOptions builds workflowOptions with defaults for everything except startToCloseTimeout
func newWorkflowOptions(id string, executionTimeout time.Duration) client.StartWorkflowOptions {
return client.StartWorkflowOptions{
ID: id,
TaskList: taskListName,
ExecutionStartToCloseTimeout: executionTimeout,
DecisionTaskStartToCloseTimeout: decisionTaskTimeout,
WorkflowIDReusePolicy: client.WorkflowIDReusePolicyAllowDuplicate,
}
}
// newActivityOptions builds and returns activityOptions with reasonable defaults
func newActivityOptions() workflow.ActivityOptions {
return workflow.ActivityOptions{
TaskList: taskListName,
StartToCloseTimeout: activityTaskTimeout,
ScheduleToStartTimeout: scheduleToStartTimeout,
ScheduleToCloseTimeout: scheduleToStartTimeout + activityTaskTimeout,
}
}
// newChildWorkflowOptions builds and returns childWorkflowOptions for given domain
func newChildWorkflowOptions(domain string, wfID string) workflow.ChildWorkflowOptions {
return workflow.ChildWorkflowOptions{
Domain: domain,
WorkflowID: wfID,
TaskList: taskListName,
ExecutionStartToCloseTimeout: childWorkflowTimeout,
TaskStartToCloseTimeout: decisionTaskTimeout,
WorkflowIDReusePolicy: client.WorkflowIDReusePolicyAllowDuplicate,
}
}
// registerWorkflow registers a workflow function with a given friendly name
func registerWorkflow(workflowFunc interface{}, name string) {
opts := workflow.RegisterOptions{Name: name}
workflow.RegisterWithOptions(workflowFunc, opts)
}
// registerActivity registers an activity function with a given friendly name
func registerActivity(activityFunc interface{}, name string) {
opts := activity.RegisterOptions{Name: name}
activity.RegisterWithOptions(activityFunc, opts)
}