Contoh Step Functions menggunakan SDK untuk Java 2.x - AWS SDK for Java 2.x

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Contoh Step Functions 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 Step Functions.

Dasar-dasar adalah contoh kode yang menunjukkan kepada Anda bagaimana melakukan operasi penting dalam suatu layanan.

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

Skenario adalah contoh kode yang menunjukkan kepada Anda bagaimana menyelesaikan tugas tertentu dengan memanggil beberapa fungsi dalam layanan atau dikombinasikan dengan yang lain Layanan AWS.

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

Memulai

Contoh kode berikut menunjukkan cara memulai menggunakan Step Functions.

SDKuntuk Java 2.x
catatan

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

Hello versi Java.

import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.sfn.SfnClient; import software.amazon.awssdk.services.sfn.model.ListStateMachinesResponse; import software.amazon.awssdk.services.sfn.model.SfnException; import software.amazon.awssdk.services.sfn.model.StateMachineListItem; import java.util.List; /** * 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 ListStateMachines { public static void main(String[] args) { Region region = Region.US_EAST_1; SfnClient sfnClient = SfnClient.builder() .region(region) .build(); listMachines(sfnClient); sfnClient.close(); } public static void listMachines(SfnClient sfnClient) { try { ListStateMachinesResponse response = sfnClient.listStateMachines(); List<StateMachineListItem> machines = response.stateMachines(); for (StateMachineListItem machine : machines) { System.out.println("The name of the state machine is: " + machine.name()); System.out.println("The ARN value is : " + machine.stateMachineArn()); } } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } }

Hal-hal mendasar

Contoh kode berikut ini menunjukkan cara:

  • Buat aktivitas.

  • Buat mesin status dari definisi Bahasa Negara Amazon yang berisi aktivitas yang dibuat sebelumnya sebagai langkah.

  • Jalankan mesin status dan tanggapi aktivitas dengan input pengguna.

  • Dapatkan status dan output akhir setelah proses selesai, lalu bersihkan sumber daya.

SDKuntuk Java 2.x
catatan

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

/** * You can obtain the JSON file to create a state machine in the following * GitHub location. * * https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/resources/sample_files * * To run this code example, place the chat_sfn_state_machine.json file into * your project's resources folder. * * Also, set up your development environment, including your credentials. * * For information, see this documentation topic: * * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html * * This Java code example performs the following tasks: * * 1. Creates an activity. * 2. Creates a state machine. * 3. Describes the state machine. * 4. Starts execution of the state machine and interacts with it. * 5. Describes the execution. * 6. Delete the activity. * 7. Deletes the state machine. */ public class StepFunctionsScenario { public static final String DASHES = new String(new char[80]).replace("\0", "-"); public static void main(String[] args) throws Exception { final String usage = """ Usage: <roleARN> <activityName> <stateMachineName> Where: roleName - The name of the IAM role to create for this state machine. activityName - The name of an activity to create. stateMachineName - The name of the state machine to create. """; if (args.length != 3) { System.out.println(usage); System.exit(1); } String roleName = args[0]; String activityName = args[1]; String stateMachineName = args[2]; String polJSON = "{\n" + " \"Version\": \"2012-10-17\",\n" + " \"Statement\": [\n" + " {\n" + " \"Sid\": \"\",\n" + " \"Effect\": \"Allow\",\n" + " \"Principal\": {\n" + " \"Service\": \"states.amazonaws.com\"\n" + " },\n" + " \"Action\": \"sts:AssumeRole\"\n" + " }\n" + " ]\n" + "}"; Scanner sc = new Scanner(System.in); boolean action = false; Region region = Region.US_EAST_1; SfnClient sfnClient = SfnClient.builder() .region(region) .build(); Region regionGl = Region.AWS_GLOBAL; IamClient iam = IamClient.builder() .region(regionGl) .build(); System.out.println(DASHES); System.out.println("Welcome to the AWS Step Functions example scenario."); System.out.println(DASHES); System.out.println(DASHES); System.out.println("1. Create an activity."); String activityArn = createActivity(sfnClient, activityName); System.out.println("The ARN of the activity is " + activityArn); System.out.println(DASHES); // Get JSON to use for the state machine and place the activityArn value into // it. InputStream input = StepFunctionsScenario.class.getClassLoader() .getResourceAsStream("chat_sfn_state_machine.json"); ObjectMapper mapper = new ObjectMapper(); JsonNode jsonNode = mapper.readValue(input, JsonNode.class); String jsonString = mapper.writeValueAsString(jsonNode); // Modify the Resource node. ObjectMapper objectMapper = new ObjectMapper(); JsonNode root = objectMapper.readTree(jsonString); ((ObjectNode) root.path("States").path("GetInput")).put("Resource", activityArn); // Convert the modified Java object back to a JSON string. String stateDefinition = objectMapper.writeValueAsString(root); System.out.println(stateDefinition); System.out.println(DASHES); System.out.println("2. Create a state machine."); String roleARN = createIAMRole(iam, roleName, polJSON); String stateMachineArn = createMachine(sfnClient, roleARN, stateMachineName, stateDefinition); System.out.println("The ARN of the state machine is " + stateMachineArn); System.out.println(DASHES); System.out.println(DASHES); System.out.println("3. Describe the state machine."); describeStateMachine(sfnClient, stateMachineArn); System.out.println("What should ChatSFN call you?"); String userName = sc.nextLine(); System.out.println("Hello " + userName); System.out.println(DASHES); System.out.println(DASHES); // The JSON to pass to the StartExecution call. String executionJson = "{ \"name\" : \"" + userName + "\" }"; System.out.println(executionJson); System.out.println("4. Start execution of the state machine and interact with it."); String runArn = startWorkflow(sfnClient, stateMachineArn, executionJson); System.out.println("The ARN of the state machine execution is " + runArn); List<String> myList; while (!action) { myList = getActivityTask(sfnClient, activityArn); System.out.println("ChatSFN: " + myList.get(1)); System.out.println(userName + " please specify a value."); String myAction = sc.nextLine(); if (myAction.compareTo("done") == 0) action = true; System.out.println("You have selected " + myAction); String taskJson = "{ \"action\" : \"" + myAction + "\" }"; System.out.println(taskJson); sendTaskSuccess(sfnClient, myList.get(0), taskJson); } System.out.println(DASHES); System.out.println(DASHES); System.out.println("5. Describe the execution."); describeExe(sfnClient, runArn); System.out.println(DASHES); System.out.println(DASHES); System.out.println("6. Delete the activity."); deleteActivity(sfnClient, activityArn); System.out.println(DASHES); System.out.println(DASHES); System.out.println("7. Delete the state machines."); deleteMachine(sfnClient, stateMachineArn); System.out.println(DASHES); System.out.println(DASHES); System.out.println("The AWS Step Functions example scenario is complete."); System.out.println(DASHES); } 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); return response.role().arn(); } catch (IamException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; } public static void describeExe(SfnClient sfnClient, String executionArn) { try { DescribeExecutionRequest executionRequest = DescribeExecutionRequest.builder() .executionArn(executionArn) .build(); String status = ""; boolean hasSucceeded = false; while (!hasSucceeded) { DescribeExecutionResponse response = sfnClient.describeExecution(executionRequest); status = response.statusAsString(); if (status.compareTo("RUNNING") == 0) { System.out.println("The state machine is still running, let's wait for it to finish."); Thread.sleep(2000); } else if (status.compareTo("SUCCEEDED") == 0) { System.out.println("The Step Function workflow has succeeded"); hasSucceeded = true; } else { System.out.println("The Status is neither running or succeeded"); } } System.out.println("The Status is " + status); } catch (SfnException | InterruptedException e) { System.err.println(e.getMessage()); System.exit(1); } } public static void sendTaskSuccess(SfnClient sfnClient, String token, String json) { try { SendTaskSuccessRequest successRequest = SendTaskSuccessRequest.builder() .taskToken(token) .output(json) .build(); sfnClient.sendTaskSuccess(successRequest); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } public static List<String> getActivityTask(SfnClient sfnClient, String actArn) { List<String> myList = new ArrayList<>(); GetActivityTaskRequest getActivityTaskRequest = GetActivityTaskRequest.builder() .activityArn(actArn) .build(); GetActivityTaskResponse response = sfnClient.getActivityTask(getActivityTaskRequest); myList.add(response.taskToken()); myList.add(response.input()); return myList; } public static void deleteActivity(SfnClient sfnClient, String actArn) { try { DeleteActivityRequest activityRequest = DeleteActivityRequest.builder() .activityArn(actArn) .build(); sfnClient.deleteActivity(activityRequest); System.out.println("You have deleted " + actArn); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } public static void describeStateMachine(SfnClient sfnClient, String stateMachineArn) { try { DescribeStateMachineRequest stateMachineRequest = DescribeStateMachineRequest.builder() .stateMachineArn(stateMachineArn) .build(); DescribeStateMachineResponse response = sfnClient.describeStateMachine(stateMachineRequest); System.out.println("The name of the State machine is " + response.name()); System.out.println("The status of the State machine is " + response.status()); System.out.println("The ARN value of the State machine is " + response.stateMachineArn()); System.out.println("The role ARN value is " + response.roleArn()); } catch (SfnException e) { System.err.println(e.getMessage()); } } public static void deleteMachine(SfnClient sfnClient, String stateMachineArn) { try { DeleteStateMachineRequest deleteStateMachineRequest = DeleteStateMachineRequest.builder() .stateMachineArn(stateMachineArn) .build(); sfnClient.deleteStateMachine(deleteStateMachineRequest); DescribeStateMachineRequest describeStateMachine = DescribeStateMachineRequest.builder() .stateMachineArn(stateMachineArn) .build(); while (true) { DescribeStateMachineResponse response = sfnClient.describeStateMachine(describeStateMachine); System.out.println("The state machine is not deleted yet. The status is " + response.status()); Thread.sleep(3000); } } catch (SfnException | InterruptedException e) { System.err.println(e.getMessage()); } System.out.println(stateMachineArn + " was successfully deleted."); } public static String startWorkflow(SfnClient sfnClient, String stateMachineArn, String jsonEx) { UUID uuid = UUID.randomUUID(); String uuidValue = uuid.toString(); try { StartExecutionRequest executionRequest = StartExecutionRequest.builder() .input(jsonEx) .stateMachineArn(stateMachineArn) .name(uuidValue) .build(); StartExecutionResponse response = sfnClient.startExecution(executionRequest); return response.executionArn(); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; } public static String createMachine(SfnClient sfnClient, String roleARN, String stateMachineName, String json) { try { CreateStateMachineRequest machineRequest = CreateStateMachineRequest.builder() .definition(json) .name(stateMachineName) .roleArn(roleARN) .type(StateMachineType.STANDARD) .build(); CreateStateMachineResponse response = sfnClient.createStateMachine(machineRequest); return response.stateMachineArn(); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; } public static String createActivity(SfnClient sfnClient, String activityName) { try { CreateActivityRequest activityRequest = CreateActivityRequest.builder() .name(activityName) .build(); CreateActivityResponse response = sfnClient.createActivity(activityRequest); return response.activityArn(); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; } }

Tindakan

Contoh kode berikut menunjukkan cara menggunakanCreateActivity.

SDKuntuk Java 2.x
catatan

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

public static String createActivity(SfnClient sfnClient, String activityName) { try { CreateActivityRequest activityRequest = CreateActivityRequest.builder() .name(activityName) .build(); CreateActivityResponse response = sfnClient.createActivity(activityRequest); return response.activityArn(); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; }
  • Untuk API detailnya, lihat CreateActivitydi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanCreateStateMachine.

SDKuntuk Java 2.x
catatan

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

public static String createMachine(SfnClient sfnClient, String roleARN, String stateMachineName, String json) { try { CreateStateMachineRequest machineRequest = CreateStateMachineRequest.builder() .definition(json) .name(stateMachineName) .roleArn(roleARN) .type(StateMachineType.STANDARD) .build(); CreateStateMachineResponse response = sfnClient.createStateMachine(machineRequest); return response.stateMachineArn(); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; }

Contoh kode berikut menunjukkan cara menggunakanDeleteActivity.

SDKuntuk Java 2.x
catatan

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

public static void deleteActivity(SfnClient sfnClient, String actArn) { try { DeleteActivityRequest activityRequest = DeleteActivityRequest.builder() .activityArn(actArn) .build(); sfnClient.deleteActivity(activityRequest); System.out.println("You have deleted " + actArn); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } }
  • Untuk API detailnya, lihat DeleteActivitydi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanDeleteStateMachine.

SDKuntuk Java 2.x
catatan

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

public static void deleteMachine(SfnClient sfnClient, String stateMachineArn) { try { DeleteStateMachineRequest deleteStateMachineRequest = DeleteStateMachineRequest.builder() .stateMachineArn(stateMachineArn) .build(); sfnClient.deleteStateMachine(deleteStateMachineRequest); DescribeStateMachineRequest describeStateMachine = DescribeStateMachineRequest.builder() .stateMachineArn(stateMachineArn) .build(); while (true) { DescribeStateMachineResponse response = sfnClient.describeStateMachine(describeStateMachine); System.out.println("The state machine is not deleted yet. The status is " + response.status()); Thread.sleep(3000); } } catch (SfnException | InterruptedException e) { System.err.println(e.getMessage()); } System.out.println(stateMachineArn + " was successfully deleted."); }

Contoh kode berikut menunjukkan cara menggunakanDescribeExecution.

SDKuntuk Java 2.x
catatan

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

public static void describeExe(SfnClient sfnClient, String executionArn) { try { DescribeExecutionRequest executionRequest = DescribeExecutionRequest.builder() .executionArn(executionArn) .build(); String status = ""; boolean hasSucceeded = false; while (!hasSucceeded) { DescribeExecutionResponse response = sfnClient.describeExecution(executionRequest); status = response.statusAsString(); if (status.compareTo("RUNNING") == 0) { System.out.println("The state machine is still running, let's wait for it to finish."); Thread.sleep(2000); } else if (status.compareTo("SUCCEEDED") == 0) { System.out.println("The Step Function workflow has succeeded"); hasSucceeded = true; } else { System.out.println("The Status is neither running or succeeded"); } } System.out.println("The Status is " + status); } catch (SfnException | InterruptedException e) { System.err.println(e.getMessage()); System.exit(1); } }

Contoh kode berikut menunjukkan cara menggunakanDescribeStateMachine.

SDKuntuk Java 2.x
catatan

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

public static void describeStateMachine(SfnClient sfnClient, String stateMachineArn) { try { DescribeStateMachineRequest stateMachineRequest = DescribeStateMachineRequest.builder() .stateMachineArn(stateMachineArn) .build(); DescribeStateMachineResponse response = sfnClient.describeStateMachine(stateMachineRequest); System.out.println("The name of the State machine is " + response.name()); System.out.println("The status of the State machine is " + response.status()); System.out.println("The ARN value of the State machine is " + response.stateMachineArn()); System.out.println("The role ARN value is " + response.roleArn()); } catch (SfnException e) { System.err.println(e.getMessage()); } }

Contoh kode berikut menunjukkan cara menggunakanGetActivityTask.

SDKuntuk Java 2.x
catatan

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

public static List<String> getActivityTask(SfnClient sfnClient, String actArn) { List<String> myList = new ArrayList<>(); GetActivityTaskRequest getActivityTaskRequest = GetActivityTaskRequest.builder() .activityArn(actArn) .build(); GetActivityTaskResponse response = sfnClient.getActivityTask(getActivityTaskRequest); myList.add(response.taskToken()); myList.add(response.input()); return myList; } /// <summary> /// Stop execution of a Step Functions workflow. /// </summary> /// <param name="executionArn">The Amazon Resource Name (ARN) of /// the Step Functions execution to stop.</param> /// <returns>A Boolean value indicating the success of the action.</returns> public async Task<bool> StopExecution(string executionArn) { var response = await _amazonStepFunctions.StopExecutionAsync(new StopExecutionRequest { ExecutionArn = executionArn }); return response.HttpStatusCode == System.Net.HttpStatusCode.OK; }
  • Untuk API detailnya, lihat GetActivityTaskdi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanListActivities.

SDKuntuk Java 2.x
catatan

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

import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.sfn.SfnClient; import software.amazon.awssdk.services.sfn.model.ListActivitiesRequest; import software.amazon.awssdk.services.sfn.model.ListActivitiesResponse; import software.amazon.awssdk.services.sfn.model.SfnException; import software.amazon.awssdk.services.sfn.model.ActivityListItem; import java.util.List; /** * 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 ListActivities { public static void main(String[] args) { Region region = Region.US_EAST_1; SfnClient sfnClient = SfnClient.builder() .region(region) .build(); listAllActivites(sfnClient); sfnClient.close(); } public static void listAllActivites(SfnClient sfnClient) { try { ListActivitiesRequest activitiesRequest = ListActivitiesRequest.builder() .maxResults(10) .build(); ListActivitiesResponse response = sfnClient.listActivities(activitiesRequest); List<ActivityListItem> items = response.activities(); for (ActivityListItem item : items) { System.out.println("The activity ARN is " + item.activityArn()); System.out.println("The activity name is " + item.name()); } } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } }
  • Untuk API detailnya, lihat ListActivitiesdi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanListExecutions.

SDKuntuk Java 2.x
catatan

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

public static void getExeHistory(SfnClient sfnClient, String exeARN) { try { GetExecutionHistoryRequest historyRequest = GetExecutionHistoryRequest.builder() .executionArn(exeARN) .maxResults(10) .build(); GetExecutionHistoryResponse historyResponse = sfnClient.getExecutionHistory(historyRequest); List<HistoryEvent> events = historyResponse.events(); for (HistoryEvent event : events) { System.out.println("The event type is " + event.type().toString()); } } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } }
  • Untuk API detailnya, lihat ListExecutionsdi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanListStateMachines.

SDKuntuk Java 2.x
catatan

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

import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.sfn.SfnClient; import software.amazon.awssdk.services.sfn.model.ListStateMachinesResponse; import software.amazon.awssdk.services.sfn.model.SfnException; import software.amazon.awssdk.services.sfn.model.StateMachineListItem; import java.util.List; /** * 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 ListStateMachines { public static void main(String[] args) { Region region = Region.US_EAST_1; SfnClient sfnClient = SfnClient.builder() .region(region) .build(); listMachines(sfnClient); sfnClient.close(); } public static void listMachines(SfnClient sfnClient) { try { ListStateMachinesResponse response = sfnClient.listStateMachines(); List<StateMachineListItem> machines = response.stateMachines(); for (StateMachineListItem machine : machines) { System.out.println("The name of the state machine is: " + machine.name()); System.out.println("The ARN value is : " + machine.stateMachineArn()); } } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } }

Contoh kode berikut menunjukkan cara menggunakanSendTaskSuccess.

SDKuntuk Java 2.x
catatan

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

public static void sendTaskSuccess(SfnClient sfnClient, String token, String json) { try { SendTaskSuccessRequest successRequest = SendTaskSuccessRequest.builder() .taskToken(token) .output(json) .build(); sfnClient.sendTaskSuccess(successRequest); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } }
  • Untuk API detailnya, lihat SendTaskSuccessdi AWS SDK for Java 2.x APIReferensi.

Contoh kode berikut menunjukkan cara menggunakanStartExecution.

SDKuntuk Java 2.x
catatan

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

public static String startWorkflow(SfnClient sfnClient, String stateMachineArn, String jsonEx) { UUID uuid = UUID.randomUUID(); String uuidValue = uuid.toString(); try { StartExecutionRequest executionRequest = StartExecutionRequest.builder() .input(jsonEx) .stateMachineArn(stateMachineArn) .name(uuidValue) .build(); StartExecutionResponse response = sfnClient.startExecution(executionRequest); return response.executionArn(); } catch (SfnException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; }
  • Untuk API detailnya, lihat StartExecutiondi AWS SDK for Java 2.x APIReferensi.

Skenario

Contoh kode berikut menunjukkan cara membuat mesin AWS Step Functions status yang memanggil AWS Lambda fungsi secara berurutan.

SDKuntuk Java 2.x

Menunjukkan cara membuat alur kerja AWS tanpa server dengan menggunakan AWS Step Functions dan. AWS SDK for Java 2.x Setiap langkah alur kerja diimplementasikan menggunakan AWS Lambda fungsi.

Untuk kode sumber lengkap dan instruksi tentang cara mengatur dan menjalankan, lihat contoh lengkapnya di GitHub.

Layanan yang digunakan dalam contoh ini
  • DynamoDB

  • Lambda

  • Amazon SES

  • Step Functions