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echo.go
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echo.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"
"errors"
"math"
"reflect"
"go.uber.org/cadence/activity"
"go.uber.org/cadence/workflow"
"go.uber.org/zap"
)
// echoInput is the input to echoActivity
type echoInput struct {
IntVal int64
IntPtrVal *int64
FloatVal float64
StringVal string
StringPtrVal *string
SliceVal []string
MapVal map[string]string
}
// echoOutput is the output from echoActivity
type echoOutput echoInput
func init() {
registerWorkflow(echoWorkflow, wfTypeEcho)
registerActivity(echoActivity, activityTypeEcho)
}
// echoWorkflow is a workflow implementation which simply executes an
// activity that echoes back the input as output
func echoWorkflow(ctx workflow.Context, inputScheduledTimeNanos int64) error {
scheduledTimeNanos := getScheduledTimeFromInputIfNonZero(ctx, inputScheduledTimeNanos)
profile, err := beginWorkflow(ctx, wfTypeEcho, scheduledTimeNanos)
if err != nil {
return err
}
input := newEchoInput()
now := workflow.Now(ctx).UnixNano()
aCtx := workflow.WithActivityOptions(ctx, newActivityOptions())
future := workflow.ExecuteActivity(aCtx, activityTypeEcho, now, input)
var output echoOutput
if err := future.Get(aCtx, &output); err != nil {
workflow.GetLogger(ctx).Info("echoActivity failed", zap.Error(err))
return profile.end(err)
}
if !reflect.DeepEqual(output, echoOutput(*input)) {
workflow.GetLogger(ctx).Sugar().Error("echoActivity returned wrong output", output, input)
return profile.end(errors.New("echoActivity returned invalid output"))
}
return profile.end(nil)
}
// echoActivity is an activity implementation that simply returns the input as output
// it also validates that the passed in input has the exepected values
func echoActivity(ctx context.Context, scheduledTimeNanos int64, input *echoInput) (echoOutput, error) {
scope := activity.GetMetricsScope(ctx)
var err error
scope, sw := recordActivityStart(scope, activityTypeEcho, scheduledTimeNanos)
defer recordActivityEnd(scope, sw, err)
expected := newEchoInput()
if !reflect.DeepEqual(expected, input) {
err = errors.New("equality check failed")
return echoOutput{}, err
}
return echoOutput(*input), nil
}
func newEchoInput() *echoInput {
intVal := int64(math.MaxInt64)
stringVal := "canary_echo_test"
return &echoInput{
IntVal: intVal,
IntPtrVal: &intVal,
FloatVal: math.MaxFloat64,
StringVal: stringVal,
StringPtrVal: &stringVal,
SliceVal: []string{"canary", ".", "echoWorkflow"},
MapVal: map[string]string{"us-east-1": "dca1a", "us-west-1": "sjc1a"},
}
}