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CreateTarget.go
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CreateTarget.go
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// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
// snippet-start:[cloudwatch.go.create_target]
package main
// snippet-start:[cloudwatch.go.create_target.imports]
import (
"flag"
"fmt"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudwatchevents"
)
// snippet-end:[cloudwatch.go.create_target.imports]
// CreateTarget creates a target that is the resource that is invoked when the rule is triggered
// Inputs:
//
// sess is the current session, which provides configuration for the SDK's service clients
// rule is the name of the rule
// lambdaARN is the ARN of the Lambda function that is invoked
// targetID is the identifier for the target
//
// Output:
//
// If successful, a PutTargetsOutput and nil
// Otherwise, nil and the error from a call to PutTargets
func CreateTarget(sess *session.Session, rule *string, lambdaARN *string, targetID *string) error {
// Create the service client
// snippet-start:[cloudwatch.go.create_target.call]
svc := cloudwatchevents.New(sess)
_, err := svc.PutTargets(&cloudwatchevents.PutTargetsInput{
Rule: rule,
Targets: []*cloudwatchevents.Target{
&cloudwatchevents.Target{
Arn: lambdaARN,
Id: targetID,
},
},
})
// snippet-end:[cloudwatch.go.create_target.call]
if err != nil {
return err
}
return nil
}
func main() {
// snippet-start:[cloudwatch.go.create_target.args]
rule := flag.String("r", "", "The name of the rule")
lambdaARN := flag.String("l", "", "The ARN of the Lambda function that is invoked")
targetID := flag.String("t", "", "The identifier for the target")
flag.Parse()
if *rule == "" || *lambdaARN == "" || *targetID == "" {
fmt.Println("You must supply a rule name (-r RULE), Lambda ARN (-l LAMBDA) and target ID (-t TARGET)")
return
}
// snippet-end:[cloudwatch.go.create_target.args]
// Initialize a session that the SDK uses to load
// credentials from the shared credentials file (~/.aws/credentials)
// snippet-start:[cloudwatch.go.create_target.session]
sess := session.Must(session.NewSessionWithOptions(session.Options{
SharedConfigState: session.SharedConfigEnable,
}))
// snippet-end:[cloudwatch.go.create_target.session]
err := CreateTarget(sess, rule, lambdaARN, targetID)
if err != nil {
fmt.Println("Got an error creating a target:")
fmt.Println(err)
return
}
// snippet-start:[cloudwatch.go.create_target.print]
fmt.Println("Target " + *targetID + " created")
// snippet-end:[cloudwatch.go.create_target.print]
}
// snippet-end:[cloudwatch.go.create_target]