EventBridge contoh menggunakan SDK untuk Java 2.x

Contoh kode berikut menunjukkan cara melakukan tindakan dan mengimplementasikan skenario umum dengan menggunakan AWS SDK for Java 2.x with EventBridge.

Tindakan adalah kutipan kode dari program yang lebih besar dan harus dijalankan dalam konteks. Meskipun tindakan menunjukkan cara memanggil fungsi layanan individual, Anda dapat melihat tindakan dalam konteks pada skenario terkait dan contoh lintas layanan.

Skenario adalah contoh kode yang menunjukkan cara menyelesaikan tugas tertentu dengan memanggil beberapa fungsi dalam layanan yang sama.

Setiap contoh menyertakan tautan ke GitHub, di mana Anda dapat menemukan petunjuk tentang cara mengatur dan menjalankan kode dalam konteks.

Memulai

Contoh kode berikut menunjukkan cara untuk mulai menggunakan EventBridge.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.


/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 *
 */
public class HelloEventBridge {
    public static void main(String[] args) {
        Region region = Region.US_WEST_2;
        EventBridgeClient eventBrClient = EventBridgeClient.builder()
                .region(region)
                .build();

        listBuses(eventBrClient);
        eventBrClient.close();
    }

    public static void listBuses(EventBridgeClient eventBrClient) {
        try {
            ListEventBusesRequest busesRequest = ListEventBusesRequest.builder()
                    .limit(10)
                    .build();

            ListEventBusesResponse response = eventBrClient.listEventBuses(busesRequest);
            List<EventBus> buses = response.eventBuses();
            for (EventBus bus : buses) {
                System.out.println("The name of the event bus is: " + bus.name());
                System.out.println("The ARN of the event bus is: " + bus.arn());
            }

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}

Untuk API detailnya, lihat ListEventBusesdi AWS SDK for Java 2.x APIReferensi.

Tindakan

Contoh kode berikut menunjukkan cara menggunakanDeleteRule.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.


    public static void deleteRuleByName(EventBridgeClient eventBrClient, String ruleName) {
        DeleteRuleRequest ruleRequest = DeleteRuleRequest.builder()
                .name(ruleName)
                .build();

        eventBrClient.deleteRule(ruleRequest);
        System.out.println("Successfully deleted the rule");
    }

Untuk API detailnya, lihat DeleteRuledi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanDescribeRule.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.


    public static void checkRule(EventBridgeClient eventBrClient, String eventRuleName) {
        try {
            DescribeRuleRequest ruleRequest = DescribeRuleRequest.builder()
                    .name(eventRuleName)
                    .build();

            DescribeRuleResponse response = eventBrClient.describeRule(ruleRequest);
            System.out.println("The state of the rule is " + response.stateAsString());

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Untuk API detailnya, lihat DescribeRuledi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanDisableRule.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.

Nonaktifkan aturan dengan menggunakan nama aturannya.


    public static void changeRuleState(EventBridgeClient eventBrClient, String eventRuleName, Boolean isEnabled) {
        try {
            if (!isEnabled) {
                System.out.println("Disabling the rule: " + eventRuleName);
                DisableRuleRequest ruleRequest = DisableRuleRequest.builder()
                        .name(eventRuleName)
                        .build();

                eventBrClient.disableRule(ruleRequest);
            } else {
                System.out.println("Enabling the rule: " + eventRuleName);
                EnableRuleRequest ruleRequest = EnableRuleRequest.builder()
                        .name(eventRuleName)
                        .build();
                eventBrClient.enableRule(ruleRequest);
            }

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Untuk API detailnya, lihat DisableRuledi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanEnableRule.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.

Aktifkan aturan dengan menggunakan nama aturannya.


    public static void changeRuleState(EventBridgeClient eventBrClient, String eventRuleName, Boolean isEnabled) {
        try {
            if (!isEnabled) {
                System.out.println("Disabling the rule: " + eventRuleName);
                DisableRuleRequest ruleRequest = DisableRuleRequest.builder()
                        .name(eventRuleName)
                        .build();

                eventBrClient.disableRule(ruleRequest);
            } else {
                System.out.println("Enabling the rule: " + eventRuleName);
                EnableRuleRequest ruleRequest = EnableRuleRequest.builder()
                        .name(eventRuleName)
                        .build();
                eventBrClient.enableRule(ruleRequest);
            }

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Untuk API detailnya, lihat EnableRuledi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanListRuleNamesByTarget.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.

Buat daftar semua nama aturan dengan menggunakan target.


    public static void listTargetRules(EventBridgeClient eventBrClient, String topicArn) {
        ListRuleNamesByTargetRequest ruleNamesByTargetRequest = ListRuleNamesByTargetRequest.builder()
                .targetArn(topicArn)
                .build();

        ListRuleNamesByTargetResponse response = eventBrClient.listRuleNamesByTarget(ruleNamesByTargetRequest);
        List<String> rules = response.ruleNames();
        for (String rule : rules) {
            System.out.println("The rule name is " + rule);
        }
    }

Untuk API detailnya, lihat ListRuleNamesByTargetdi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanListRules.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.

Aktifkan aturan dengan menggunakan nama aturannya.


    public static void listRules(EventBridgeClient eventBrClient) {
        try {
            ListRulesRequest rulesRequest = ListRulesRequest.builder()
                    .eventBusName("default")
                    .limit(10)
                    .build();

            ListRulesResponse response = eventBrClient.listRules(rulesRequest);
            List<Rule> rules = response.rules();
            for (Rule rule : rules) {
                System.out.println("The rule name is : " + rule.name());
                System.out.println("The rule description is : " + rule.description());
                System.out.println("The rule state is : " + rule.stateAsString());
            }

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Untuk API detailnya, lihat ListRulesdi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanListTargetsByRule.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.

Daftar semua target untuk aturan dengan menggunakan nama aturan.


    public static void listTargets(EventBridgeClient eventBrClient, String ruleName) {
        ListTargetsByRuleRequest ruleRequest = ListTargetsByRuleRequest.builder()
                .rule(ruleName)
                .build();

        ListTargetsByRuleResponse res = eventBrClient.listTargetsByRule(ruleRequest);
        List<Target> targetsList = res.targets();
        for (Target target: targetsList) {
            System.out.println("Target ARN: "+target.arn());
        }
    }

Untuk API detailnya, lihat ListTargetsByRuledi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanPutEvents.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.


    public static void triggerCustomRule(EventBridgeClient eventBrClient, String email) {
        String json = "{" +
                "\"UserEmail\": \"" + email + "\"," +
                "\"Message\": \"This event was generated by example code.\"," +
                "\"UtcTime\": \"Now.\"" +
                "}";

        PutEventsRequestEntry entry = PutEventsRequestEntry.builder()
                .source("ExampleSource")
                .detail(json)
                .detailType("ExampleType")
                .build();

        PutEventsRequest eventsRequest = PutEventsRequest.builder()
                .entries(entry)
                .build();

        eventBrClient.putEvents(eventsRequest);
    }

Untuk API detailnya, lihat PutEventsdi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanPutRule.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.

Buat aturan terjadwal.


    public static void createEBRule(EventBridgeClient eventBrClient, String ruleName, String cronExpression) {
        try {
            PutRuleRequest ruleRequest = PutRuleRequest.builder()
                    .name(ruleName)
                    .eventBusName("default")
                    .scheduleExpression(cronExpression)
                    .state("ENABLED")
                    .description("A test rule that runs on a schedule created by the Java API")
                    .build();

            PutRuleResponse ruleResponse = eventBrClient.putRule(ruleRequest);
            System.out.println("The ARN of the new rule is " + ruleResponse.ruleArn());

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Buat aturan yang dipicu saat objek ditambahkan ke bucket Amazon Simple Storage Service.


    // Create a new event rule that triggers when an Amazon S3 object is created in
    // a bucket.
    public static void addEventRule(EventBridgeClient eventBrClient, String roleArn, String bucketName,
            String eventRuleName) {
        String pattern = "{\n" +
                "  \"source\": [\"aws.s3\"],\n" +
                "  \"detail-type\": [\"Object Created\"],\n" +
                "  \"detail\": {\n" +
                "    \"bucket\": {\n" +
                "      \"name\": [\"" + bucketName + "\"]\n" +
                "    }\n" +
                "  }\n" +
                "}";

        try {
            PutRuleRequest ruleRequest = PutRuleRequest.builder()
                    .description("Created by using the AWS SDK for Java v2")
                    .name(eventRuleName)
                    .eventPattern(pattern)
                    .roleArn(roleArn)
                    .build();

            PutRuleResponse ruleResponse = eventBrClient.putRule(ruleRequest);
            System.out.println("The ARN of the new rule is " + ruleResponse.ruleArn());

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Untuk API detailnya, lihat PutRuledi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanPutTargets.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.

Tambahkan SNS topik Amazon sebagai target aturan.


    // Add a rule which triggers an SNS target when a file is uploaded to an S3
    // bucket.
    public static void addSnsEventRule(EventBridgeClient eventBrClient, String ruleName, String topicArn,
            String topicName, String eventRuleName, String bucketName) {
        String targetID = java.util.UUID.randomUUID().toString();
        Target myTarget = Target.builder()
                .id(targetID)
                .arn(topicArn)
                .build();

        List<Target> targets = new ArrayList<>();
        targets.add(myTarget);
        PutTargetsRequest request = PutTargetsRequest.builder()
                .eventBusName(null)
                .targets(targets)
                .rule(ruleName)
                .build();

        eventBrClient.putTargets(request);
        System.out.println("Added event rule " + eventRuleName + " with Amazon SNS target " + topicName + " for bucket "
                + bucketName + ".");
    }

Tambahkan transformator input ke target untuk aturan.


    public static void updateCustomRuleTargetWithTransform(EventBridgeClient eventBrClient, String topicArn,
            String ruleName) {
        String targetId = java.util.UUID.randomUUID().toString();
        InputTransformer inputTransformer = InputTransformer.builder()
                .inputTemplate("\"Notification: sample event was received.\"")
                .build();

        Target target = Target.builder()
                .id(targetId)
                .arn(topicArn)
                .inputTransformer(inputTransformer)
                .build();

        try {
            PutTargetsRequest targetsRequest = PutTargetsRequest.builder()
                    .rule(ruleName)
                    .targets(target)
                    .eventBusName(null)
                    .build();

            eventBrClient.putTargets(targetsRequest);
        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Untuk API detailnya, lihat PutTargetsdi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanRemoveTargets.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.

Hapus semua target untuk aturan dengan menggunakan nama aturan.


    public static void deleteTargetsFromRule(EventBridgeClient eventBrClient, String eventRuleName) {
        // First, get all targets that will be deleted.
        ListTargetsByRuleRequest request = ListTargetsByRuleRequest.builder()
                .rule(eventRuleName)
                .build();

        ListTargetsByRuleResponse response = eventBrClient.listTargetsByRule(request);
        List<Target> allTargets = response.targets();

        // Get all targets and delete them.
        for (Target myTarget : allTargets) {
            RemoveTargetsRequest removeTargetsRequest = RemoveTargetsRequest.builder()
                    .rule(eventRuleName)
                    .ids(myTarget.id())
                    .build();

            eventBrClient.removeTargets(removeTargetsRequest);
            System.out.println("Successfully removed the target");
        }
    }

Untuk API detailnya, lihat RemoveTargetsdi AWS SDK for Java 2.x APIReferensi.

Skenario

Contoh kode berikut ini menunjukkan cara:

Buat aturan dan tambahkan target ke dalamnya.
Aktifkan dan nonaktifkan aturan.
Daftar dan perbarui aturan dan target.
Kirim acara, lalu bersihkan sumber daya.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.


/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 *
 * This Java code example performs the following tasks:
 *
 * This Java V2 example performs the following tasks with Amazon EventBridge:
 *
 * 1. Creates an AWS Identity and Access Management (IAM) role to use with
 * Amazon EventBridge.
 * 2. Amazon Simple Storage Service (Amazon S3) bucket with EventBridge events
 * enabled.
 * 3. Creates a rule that triggers when an object is uploaded to Amazon S3.
 * 4. Lists rules on the event bus.
 * 5. Creates a new Amazon Simple Notification Service (Amazon SNS) topic and
 * lets the user subscribe to it.
 * 6. Adds a target to the rule that sends an email to the specified topic.
 * 7. Creates an EventBridge event that sends an email when an Amazon S3 object
 * is created.
 * 8. Lists Targets.
 * 9. Lists the rules for the same target.
 * 10. Triggers the rule by uploading a file to the Amazon S3 bucket.
 * 11. Disables a specific rule.
 * 12. Checks and print the state of the rule.
 * 13. Adds a transform to the rule to change the text of the email.
 * 14. Enables a specific rule.
 * 15. Triggers the updated rule by uploading a file to the Amazon S3 bucket.
 * 16. Updates the rule to be a custom rule pattern.
 * 17. Sending an event to trigger the rule.
 * 18. Cleans up resources.
 *
 */
public class EventbridgeMVP {
    public static final String DASHES = new String(new char[80]).replace("\0", "-");

    public static void main(String[] args) throws InterruptedException, IOException {
        final String usage = """

                Usage:
                    <roleName> <bucketName> <topicName> <eventRuleName>

                Where:
                    roleName - The name of the role to create.
                    bucketName - The Amazon Simple Storage Service (Amazon S3) bucket name to create.
                    topicName - The name of the Amazon Simple Notification Service (Amazon SNS) topic to create.
                    eventRuleName - The Amazon EventBridge rule name to create.
                """;

        if (args.length != 5) {
            System.out.println(usage);
            System.exit(1);
        }

        String polJSON = "{" +
                "\"Version\": \"2012-10-17\"," +
                "\"Statement\": [{" +
                "\"Effect\": \"Allow\"," +
                "\"Principal\": {" +
                "\"Service\": \"events.amazonaws.com\"" +
                "}," +
                "\"Action\": \"sts:AssumeRole\"" +
                "}]" +
                "}";

        Scanner sc = new Scanner(System.in);
        String roleName = args[0];
        String bucketName = args[1];
        String topicName = args[2];
        String eventRuleName = args[3];

        Region region = Region.US_EAST_1;
        EventBridgeClient eventBrClient = EventBridgeClient.builder()
                .region(region)
                .build();

        S3Client s3Client = S3Client.builder()
                .region(region)
                .build();

        Region regionGl = Region.AWS_GLOBAL;
        IamClient iam = IamClient.builder()
                .region(regionGl)
                .build();

        SnsClient snsClient = SnsClient.builder()
                .region(region)
                .build();

        System.out.println(DASHES);
        System.out.println("Welcome to the Amazon EventBridge example scenario.");
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out
                .println("1. Create an AWS Identity and Access Management (IAM) role to use with Amazon EventBridge.");
        String roleArn = createIAMRole(iam, roleName, polJSON);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("2. Create an S3 bucket with EventBridge events enabled.");
        if (checkBucket(s3Client, bucketName)) {
            System.out.println("Bucket " + bucketName + " already exists. Ending this scenario.");
            System.exit(1);
        }

        createBucket(s3Client, bucketName);
        Thread.sleep(3000);
        setBucketNotification(s3Client, bucketName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("3. Create a rule that triggers when an object is uploaded to Amazon S3.");
        Thread.sleep(10000);
        addEventRule(eventBrClient, roleArn, bucketName, eventRuleName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("4. List rules on the event bus.");
        listRules(eventBrClient);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("5. Create a new SNS topic for testing and let the user subscribe to the topic.");
        String topicArn = createSnsTopic(snsClient, topicName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("6. Add a target to the rule that sends an email to the specified topic.");
        System.out.println("Enter your email to subscribe to the Amazon SNS topic:");
        String email = sc.nextLine();
        subEmail(snsClient, topicArn, email);
        System.out.println(
                "Use the link in the email you received to confirm your subscription. Then, press Enter to continue.");
        sc.nextLine();
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("7. Create an EventBridge event that sends an email when an Amazon S3 object is created.");
        addSnsEventRule(eventBrClient, eventRuleName, topicArn, topicName, eventRuleName, bucketName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println(" 8. List Targets.");
        listTargets(eventBrClient, eventRuleName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println(" 9. List the rules for the same target.");
        listTargetRules(eventBrClient, topicArn);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println(" 10. Trigger the rule by uploading a file to the S3 bucket.");
        System.out.println("Press Enter to continue.");
        sc.nextLine();
        uploadTextFiletoS3(s3Client, bucketName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("11. Disable a specific rule.");
        changeRuleState(eventBrClient, eventRuleName, false);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("12. Check and print the state of the rule.");
        checkRule(eventBrClient, eventRuleName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("13. Add a transform to the rule to change the text of the email.");
        updateSnsEventRule(eventBrClient, topicArn, eventRuleName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("14. Enable a specific rule.");
        changeRuleState(eventBrClient, eventRuleName, true);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println(" 15. Trigger the updated rule by uploading a file to the S3 bucket.");
        System.out.println("Press Enter to continue.");
        sc.nextLine();
        uploadTextFiletoS3(s3Client, bucketName);
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println(" 16. Update the rule to be a custom rule pattern.");
        updateToCustomRule(eventBrClient, eventRuleName);
        System.out.println("Updated event rule " + eventRuleName + " to use a custom pattern.");
        updateCustomRuleTargetWithTransform(eventBrClient, topicArn, eventRuleName);
        System.out.println("Updated event target " + topicArn + ".");
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("17. Sending an event to trigger the rule. This will trigger a subscription email.");
        triggerCustomRule(eventBrClient, email);
        System.out.println("Events have been sent. Press Enter to continue.");
        sc.nextLine();
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("18. Clean up resources.");
        System.out.println("Do you want to clean up resources (y/n)");
        String ans = sc.nextLine();
        if (ans.compareTo("y") == 0) {
            cleanupResources(eventBrClient, snsClient, s3Client, iam, topicArn, eventRuleName, bucketName, roleName);
        } else {
            System.out.println("The resources will not be cleaned up. ");
        }
        System.out.println(DASHES);

        System.out.println(DASHES);
        System.out.println("The Amazon EventBridge example scenario has successfully completed.");
        System.out.println(DASHES);
    }

    public static void cleanupResources(EventBridgeClient eventBrClient, SnsClient snsClient, S3Client s3Client,
            IamClient iam, String topicArn, String eventRuleName, String bucketName, String roleName) {
        System.out.println("Removing all targets from the event rule.");
        deleteTargetsFromRule(eventBrClient, eventRuleName);
        deleteRuleByName(eventBrClient, eventRuleName);
        deleteSNSTopic(snsClient, topicArn);
        deleteS3Bucket(s3Client, bucketName);
        deleteRole(iam, roleName);
    }

    public static void deleteRole(IamClient iam, String roleName) {
        String policyArn = "arn:aws:iam::aws:policy/AmazonEventBridgeFullAccess";
        DetachRolePolicyRequest policyRequest = DetachRolePolicyRequest.builder()
                .policyArn(policyArn)
                .roleName(roleName)
                .build();

        iam.detachRolePolicy(policyRequest);
        System.out.println("Successfully detached policy " + policyArn + " from role " + roleName);

        // Delete the role.
        DeleteRoleRequest roleRequest = DeleteRoleRequest.builder()
                .roleName(roleName)
                .build();

        iam.deleteRole(roleRequest);
        System.out.println("*** Successfully deleted " + roleName);
    }

    public static void deleteS3Bucket(S3Client s3Client, String bucketName) {
        // Remove all the objects from the S3 bucket.
        ListObjectsRequest listObjects = ListObjectsRequest.builder()
                .bucket(bucketName)
                .build();

        ListObjectsResponse res = s3Client.listObjects(listObjects);
        List<S3Object> objects = res.contents();
        ArrayList<ObjectIdentifier> toDelete = new ArrayList<>();

        for (S3Object myValue : objects) {
            toDelete.add(ObjectIdentifier.builder()
                    .key(myValue.key())
                    .build());
        }

        DeleteObjectsRequest dor = DeleteObjectsRequest.builder()
                .bucket(bucketName)
                .delete(Delete.builder()
                        .objects(toDelete).build())
                .build();

        s3Client.deleteObjects(dor);

        // Delete the S3 bucket.
        DeleteBucketRequest deleteBucketRequest = DeleteBucketRequest.builder()
                .bucket(bucketName)
                .build();

        s3Client.deleteBucket(deleteBucketRequest);
        System.out.println("You have deleted the bucket and the objects");
    }

    // Delete the SNS topic.
    public static void deleteSNSTopic(SnsClient snsClient, String topicArn) {
        try {
            DeleteTopicRequest request = DeleteTopicRequest.builder()
                    .topicArn(topicArn)
                    .build();

            DeleteTopicResponse result = snsClient.deleteTopic(request);
            System.out.println("\n\nStatus was " + result.sdkHttpResponse().statusCode());

        } catch (SnsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void deleteRuleByName(EventBridgeClient eventBrClient, String ruleName) {
        DeleteRuleRequest ruleRequest = DeleteRuleRequest.builder()
                .name(ruleName)
                .build();

        eventBrClient.deleteRule(ruleRequest);
        System.out.println("Successfully deleted the rule");
    }

    public static void deleteTargetsFromRule(EventBridgeClient eventBrClient, String eventRuleName) {
        // First, get all targets that will be deleted.
        ListTargetsByRuleRequest request = ListTargetsByRuleRequest.builder()
                .rule(eventRuleName)
                .build();

        ListTargetsByRuleResponse response = eventBrClient.listTargetsByRule(request);
        List<Target> allTargets = response.targets();

        // Get all targets and delete them.
        for (Target myTarget : allTargets) {
            RemoveTargetsRequest removeTargetsRequest = RemoveTargetsRequest.builder()
                    .rule(eventRuleName)
                    .ids(myTarget.id())
                    .build();

            eventBrClient.removeTargets(removeTargetsRequest);
            System.out.println("Successfully removed the target");
        }
    }

    public static void triggerCustomRule(EventBridgeClient eventBrClient, String email) {
        String json = "{" +
                "\"UserEmail\": \"" + email + "\"," +
                "\"Message\": \"This event was generated by example code.\"," +
                "\"UtcTime\": \"Now.\"" +
                "}";

        PutEventsRequestEntry entry = PutEventsRequestEntry.builder()
                .source("ExampleSource")
                .detail(json)
                .detailType("ExampleType")
                .build();

        PutEventsRequest eventsRequest = PutEventsRequest.builder()
                .entries(entry)
                .build();

        eventBrClient.putEvents(eventsRequest);
    }

    public static void updateCustomRuleTargetWithTransform(EventBridgeClient eventBrClient, String topicArn,
            String ruleName) {
        String targetId = java.util.UUID.randomUUID().toString();
        InputTransformer inputTransformer = InputTransformer.builder()
                .inputTemplate("\"Notification: sample event was received.\"")
                .build();

        Target target = Target.builder()
                .id(targetId)
                .arn(topicArn)
                .inputTransformer(inputTransformer)
                .build();

        try {
            PutTargetsRequest targetsRequest = PutTargetsRequest.builder()
                    .rule(ruleName)
                    .targets(target)
                    .eventBusName(null)
                    .build();

            eventBrClient.putTargets(targetsRequest);
        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void updateToCustomRule(EventBridgeClient eventBrClient, String ruleName) {
        String customEventsPattern = "{" +
                "\"source\": [\"ExampleSource\"]," +
                "\"detail-type\": [\"ExampleType\"]" +
                "}";

        PutRuleRequest request = PutRuleRequest.builder()
                .name(ruleName)
                .description("Custom test rule")
                .eventPattern(customEventsPattern)
                .build();

        eventBrClient.putRule(request);
    }

    // Update an Amazon S3 object created rule with a transform on the target.
    public static void updateSnsEventRule(EventBridgeClient eventBrClient, String topicArn, String ruleName) {
        String targetId = java.util.UUID.randomUUID().toString();
        Map<String, String> myMap = new HashMap<>();
        myMap.put("bucket", "$.detail.bucket.name");
        myMap.put("time", "$.time");

        InputTransformer inputTransformer = InputTransformer.builder()
                .inputTemplate("\"Notification: an object was uploaded to bucket <bucket> at <time>.\"")
                .inputPathsMap(myMap)
                .build();

        Target target = Target.builder()
                .id(targetId)
                .arn(topicArn)
                .inputTransformer(inputTransformer)
                .build();

        try {
            PutTargetsRequest targetsRequest = PutTargetsRequest.builder()
                    .rule(ruleName)
                    .targets(target)
                    .eventBusName(null)
                    .build();

            eventBrClient.putTargets(targetsRequest);

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void checkRule(EventBridgeClient eventBrClient, String eventRuleName) {
        try {
            DescribeRuleRequest ruleRequest = DescribeRuleRequest.builder()
                    .name(eventRuleName)
                    .build();

            DescribeRuleResponse response = eventBrClient.describeRule(ruleRequest);
            System.out.println("The state of the rule is " + response.stateAsString());

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void changeRuleState(EventBridgeClient eventBrClient, String eventRuleName, Boolean isEnabled) {
        try {
            if (!isEnabled) {
                System.out.println("Disabling the rule: " + eventRuleName);
                DisableRuleRequest ruleRequest = DisableRuleRequest.builder()
                        .name(eventRuleName)
                        .build();

                eventBrClient.disableRule(ruleRequest);
            } else {
                System.out.println("Enabling the rule: " + eventRuleName);
                EnableRuleRequest ruleRequest = EnableRuleRequest.builder()
                        .name(eventRuleName)
                        .build();
                eventBrClient.enableRule(ruleRequest);
            }

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    // Create and upload a file to an S3 bucket to trigger an event.
    public static void uploadTextFiletoS3(S3Client s3Client, String bucketName) throws IOException {
        // Create a unique file name.
        String fileSuffix = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
        String fileName = "TextFile" + fileSuffix + ".txt";

        File myFile = new File(fileName);
        FileWriter fw = new FileWriter(myFile.getAbsoluteFile());
        BufferedWriter bw = new BufferedWriter(fw);
        bw.write("This is a sample file for testing uploads.");
        bw.close();

        try {
            PutObjectRequest putOb = PutObjectRequest.builder()
                    .bucket(bucketName)
                    .key(fileName)
                    .build();

            s3Client.putObject(putOb, RequestBody.fromFile(myFile));

        } catch (S3Exception e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }

    public static void listTargetRules(EventBridgeClient eventBrClient, String topicArn) {
        ListRuleNamesByTargetRequest ruleNamesByTargetRequest = ListRuleNamesByTargetRequest.builder()
                .targetArn(topicArn)
                .build();

        ListRuleNamesByTargetResponse response = eventBrClient.listRuleNamesByTarget(ruleNamesByTargetRequest);
        List<String> rules = response.ruleNames();
        for (String rule : rules) {
            System.out.println("The rule name is " + rule);
        }
    }

    public static void listTargets(EventBridgeClient eventBrClient, String ruleName) {
        ListTargetsByRuleRequest ruleRequest = ListTargetsByRuleRequest.builder()
                .rule(ruleName)
                .build();

        ListTargetsByRuleResponse res = eventBrClient.listTargetsByRule(ruleRequest);
        List<Target> targetsList = res.targets();
        for (Target target: targetsList) {
            System.out.println("Target ARN: "+target.arn());
        }
    }

    // Add a rule which triggers an SNS target when a file is uploaded to an S3
    // bucket.
    public static void addSnsEventRule(EventBridgeClient eventBrClient, String ruleName, String topicArn,
            String topicName, String eventRuleName, String bucketName) {
        String targetID = java.util.UUID.randomUUID().toString();
        Target myTarget = Target.builder()
                .id(targetID)
                .arn(topicArn)
                .build();

        List<Target> targets = new ArrayList<>();
        targets.add(myTarget);
        PutTargetsRequest request = PutTargetsRequest.builder()
                .eventBusName(null)
                .targets(targets)
                .rule(ruleName)
                .build();

        eventBrClient.putTargets(request);
        System.out.println("Added event rule " + eventRuleName + " with Amazon SNS target " + topicName + " for bucket "
                + bucketName + ".");
    }

    public static void subEmail(SnsClient snsClient, String topicArn, String email) {
        try {
            SubscribeRequest request = SubscribeRequest.builder()
                    .protocol("email")
                    .endpoint(email)
                    .returnSubscriptionArn(true)
                    .topicArn(topicArn)
                    .build();

            SubscribeResponse result = snsClient.subscribe(request);
            System.out.println("Subscription ARN: " + result.subscriptionArn() + "\n\n Status is "
                    + result.sdkHttpResponse().statusCode());

        } catch (SnsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void listRules(EventBridgeClient eventBrClient) {
        try {
            ListRulesRequest rulesRequest = ListRulesRequest.builder()
                    .eventBusName("default")
                    .limit(10)
                    .build();

            ListRulesResponse response = eventBrClient.listRules(rulesRequest);
            List<Rule> rules = response.rules();
            for (Rule rule : rules) {
                System.out.println("The rule name is : " + rule.name());
                System.out.println("The rule description is : " + rule.description());
                System.out.println("The rule state is : " + rule.stateAsString());
            }

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static String createSnsTopic(SnsClient snsClient, String topicName) {
        String topicPolicy = "{" +
                "\"Version\": \"2012-10-17\"," +
                "\"Statement\": [{" +
                "\"Sid\": \"EventBridgePublishTopic\"," +
                "\"Effect\": \"Allow\"," +
                "\"Principal\": {" +
                "\"Service\": \"events.amazonaws.com\"" +
                "}," +
                "\"Resource\": \"*\"," +
                "\"Action\": \"sns:Publish\"" +
                "}]" +
                "}";

        Map<String, String> topicAttributes = new HashMap<>();
        topicAttributes.put("Policy", topicPolicy);
        CreateTopicRequest topicRequest = CreateTopicRequest.builder()
                .name(topicName)
                .attributes(topicAttributes)
                .build();

        CreateTopicResponse response = snsClient.createTopic(topicRequest);
        System.out.println("Added topic " + topicName + " for email subscriptions.");
        return response.topicArn();
    }

    // Create a new event rule that triggers when an Amazon S3 object is created in
    // a bucket.
    public static void addEventRule(EventBridgeClient eventBrClient, String roleArn, String bucketName,
            String eventRuleName) {
        String pattern = "{\n" +
                "  \"source\": [\"aws.s3\"],\n" +
                "  \"detail-type\": [\"Object Created\"],\n" +
                "  \"detail\": {\n" +
                "    \"bucket\": {\n" +
                "      \"name\": [\"" + bucketName + "\"]\n" +
                "    }\n" +
                "  }\n" +
                "}";

        try {
            PutRuleRequest ruleRequest = PutRuleRequest.builder()
                    .description("Created by using the AWS SDK for Java v2")
                    .name(eventRuleName)
                    .eventPattern(pattern)
                    .roleArn(roleArn)
                    .build();

            PutRuleResponse ruleResponse = eventBrClient.putRule(ruleRequest);
            System.out.println("The ARN of the new rule is " + ruleResponse.ruleArn());

        } catch (EventBridgeException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    // Determine if the S3 bucket exists.
    public static Boolean checkBucket(S3Client s3Client, String bucketName) {
        try {
            HeadBucketRequest headBucketRequest = HeadBucketRequest.builder()
                    .bucket(bucketName)
                    .build();

            s3Client.headBucket(headBucketRequest);
            return true;
        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
        }
        return false;
    }

    // Set the S3 bucket notification configuration.
    public static void setBucketNotification(S3Client s3Client, String bucketName) {
        try {
            EventBridgeConfiguration eventBridgeConfiguration = EventBridgeConfiguration.builder()
                    .build();

            NotificationConfiguration configuration = NotificationConfiguration.builder()
                    .eventBridgeConfiguration(eventBridgeConfiguration)
                    .build();

            PutBucketNotificationConfigurationRequest configurationRequest = PutBucketNotificationConfigurationRequest
                    .builder()
                    .bucket(bucketName)
                    .notificationConfiguration(configuration)
                    .skipDestinationValidation(true)
                    .build();

            s3Client.putBucketNotificationConfiguration(configurationRequest);
            System.out.println("Added bucket " + bucketName + " with EventBridge events enabled.");

        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static void createBucket(S3Client s3Client, String bucketName) {
        try {
            S3Waiter s3Waiter = s3Client.waiter();
            CreateBucketRequest bucketRequest = CreateBucketRequest.builder()
                    .bucket(bucketName)
                    .build();

            s3Client.createBucket(bucketRequest);
            HeadBucketRequest bucketRequestWait = HeadBucketRequest.builder()
                    .bucket(bucketName)
                    .build();

            // Wait until the bucket is created and print out the response.
            WaiterResponse<HeadBucketResponse> waiterResponse = s3Waiter.waitUntilBucketExists(bucketRequestWait);
            waiterResponse.matched().response().ifPresent(System.out::println);
            System.out.println(bucketName + " is ready");

        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    public static String createIAMRole(IamClient iam, String rolename, String polJSON) {
        try {
            CreateRoleRequest request = CreateRoleRequest.builder()
                    .roleName(rolename)
                    .assumeRolePolicyDocument(polJSON)
                    .description("Created using the AWS SDK for Java")
                    .build();

            CreateRoleResponse response = iam.createRole(request);
            AttachRolePolicyRequest rolePolicyRequest = AttachRolePolicyRequest.builder()
                    .roleName(rolename)
                    .policyArn("arn:aws:iam::aws:policy/AmazonEventBridgeFullAccess")
                    .build();

            iam.attachRolePolicy(rolePolicyRequest);
            return response.role().arn();

        } catch (IamException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return "";
    }
}

Untuk API detailnya, lihat topik berikut di AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara mengaktifkan bucket untuk mengirim notifikasi peristiwa S3 ke EventBridge dan merutekan notifikasi ke SNS topik Amazon dan SQS antrean Amazon.

SDKuntuk Java 2.x

catatan

Ada lebih banyak tentang GitHub. Temukan contoh lengkapnya dan pelajari cara mengatur dan menjalankannya di AWS Repositori Contoh Kode.


    /** This method configures a bucket to send events to AWS EventBridge and creates a rule
     * to route the S3 object created events to a topic and a queue.
     *
     * @param bucketName Name of existing bucket
     * @param topicArn ARN of existing topic to receive S3 event notifications
     * @param queueArn ARN of existing queue to receive S3 event notifications
     *
     *  An AWS CloudFormation stack sets up the bucket, queue, topic before the method runs.
     */
    public static String setBucketNotificationToEventBridge(String bucketName, String topicArn, String queueArn) {
        try {
            // Enable bucket to emit S3 Event notifications to EventBridge.
            s3Client.putBucketNotificationConfiguration(b -> b
                    .bucket(bucketName)
                    .notificationConfiguration(b1 -> b1
                            .eventBridgeConfiguration(
                                    SdkBuilder::build)
                    ).build()).join();

            // Create an EventBridge rule to route Object Created notifications.
            PutRuleRequest putRuleRequest = PutRuleRequest.builder()
                    .name(RULE_NAME)
                    .eventPattern("""
                            {
                              "source": ["aws.s3"],
                              "detail-type": ["Object Created"],
                              "detail": {
                                "bucket": {
                                  "name": ["%s"]
                                }
                              }
                            }
                            """.formatted(bucketName))
                    .build();

            // Add the rule to the default event bus.
            PutRuleResponse putRuleResponse = eventBridgeClient.putRule(putRuleRequest)
                    .whenComplete((r, t) -> {
                        if (t != null) {
                            logger.error("Error creating event bus rule: " + t.getMessage(), t);
                            throw new RuntimeException(t.getCause().getMessage(), t);
                        }
                        logger.info("Event bus rule creation request sent successfully. ARN is: {}", r.ruleArn());
                    }).join();

            // Add the existing SNS topic and SQS queue as targets to the rule.
            eventBridgeClient.putTargets(b -> b
                    .eventBusName("default")
                    .rule(RULE_NAME)
                    .targets(List.of (
                            Target.builder()
                                    .arn(queueArn)
                                    .id("Queue")
                                    .build(),
                            Target.builder()
                                    .arn(topicArn)
                                    .id("Topic")
                                    .build())
                            )
                    ).join();
            return putRuleResponse.ruleArn();
        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
        return null;
    }

Untuk API detailnya, lihat topik berikut di AWS SDK for Java 2.x APIReferensi.

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