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change-sets.mdclient-configuration.mddrift-detection.mdgenerated-templates.mdindex.mdpagination-waiters.mdresource-type-registry.mdstack-information.mdstack-management.mdstack-refactoring.mdstack-sets.mdtemplate-operations.md
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pagination-waiters.mddocs/

Pagination and Waiters

Handle large result sets and asynchronous operations with built-in pagination and waiter utilities.

Pagination

CloudFormation pagination utilities provide efficient handling of large result sets through automatic token management and streaming interfaces.

Core Pagination Interface

/**
 * Base paginator configuration for CloudFormation operations
 * Provides consistent pagination behavior across all commands
 */
interface PaginationConfiguration {
  /** CloudFormation client instance */
  client: CloudFormationClient;
  
  /** Maximum number of items per page (command-specific limits apply) */
  pageSize?: number;
  
  /** Starting token for pagination continuation */
  startingToken?: string;
}

/**
 * Generic paginator result interface
 * Provides async iteration over paginated results
 */
interface Paginator<T> {
  [Symbol.asyncIterator](): AsyncIterator<T>;
}

List Stacks Paginator

Paginates through stack listings with filtering support.

/**
 * Paginates through stack listings with automatic token management
 * Handles filtering and large result sets efficiently
 */
class ListStacksPaginator implements Paginator<ListStacksCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListStacksCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListStacksCommandOutput>;
}

interface ListStacksCommandInput {
  /** Token for pagination continuation */
  NextToken?: string;
  
  /** Filter by stack status */
  StackStatusFilter?: StackStatus[];
}

Usage Examples:

import { 
  CloudFormationClient, 
  ListStacksPaginator,
  StackStatus 
} from "@aws-sdk/client-cloudformation";

const client = new CloudFormationClient({ region: "us-east-1" });

// Paginate through all stacks
const paginator = new ListStacksPaginator(
  { 
    client,
    pageSize: 50 
  },
  {
    StackStatusFilter: [
      "CREATE_COMPLETE",
      "UPDATE_COMPLETE",
      "DELETE_COMPLETE"
    ]
  }
);

// Iterate through all pages
const allStacks = [];
for await (const page of paginator) {
  if (page.StackSummaries) {
    allStacks.push(...page.StackSummaries);
    console.log(`Retrieved ${page.StackSummaries.length} stacks in this page`);
  }
}

console.log(`Total stacks found: ${allStacks.length}`);

// Process stacks as they arrive
for await (const page of paginator) {
  if (page.StackSummaries) {
    for (const stack of page.StackSummaries) {
      console.log(`Stack: ${stack.StackName} - Status: ${stack.StackStatus}`);
      // Process each stack immediately without storing all in memory
    }
  }
}

Describe Stacks Paginator

Paginates through detailed stack information.

/**
 * Paginates through detailed stack descriptions
 * Supports filtering by stack name or status
 */
class DescribeStacksPaginator implements Paginator<DescribeStacksCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: DescribeStacksCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<DescribeStacksCommandOutput>;
}

interface DescribeStacksCommandInput {
  /** Specific stack name or ARN (optional) */
  StackName?: string;
  
  /** Pagination token */
  NextToken?: string;
}

List Stack Resources Paginator

Paginates through stack resources with detailed information.

/**
 * Paginates through stack resource listings
 * Provides detailed resource information for large stacks
 */
class ListStackResourcesPaginator implements Paginator<ListStackResourcesCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListStackResourcesCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListStackResourcesCommandOutput>;
}

interface ListStackResourcesCommandInput {
  /** Stack name or ARN */
  StackName: string;
  
  /** Pagination token */
  NextToken?: string;
}

Stack Events Paginator

Paginates through stack events and operational history.

/**
 * Paginates through stack event history
 * Provides chronological access to stack operations
 */
class DescribeStackEventsPaginator implements Paginator<DescribeStackEventsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: DescribeStackEventsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<DescribeStackEventsCommandOutput>;
}

interface DescribeStackEventsCommandInput {
  /** Stack name or ARN (optional for all stacks) */
  StackName?: string;
  
  /** Pagination token */
  NextToken?: string;
}

Change Sets Paginator

Paginates through change sets for a stack.

/**
 * Paginates through change sets for stack updates
 * Lists all change sets associated with a stack
 */
class ListChangeSetsPaginator implements Paginator<ListChangeSetsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListChangeSetsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListChangeSetsCommandOutput>;
}

interface ListChangeSetsCommandInput {
  /** Stack name or ARN */
  StackName: string;
  
  /** Pagination token */
  NextToken?: string;
}

Stack Sets Pagination

Paginates through stack sets and their instances.

/**
 * Paginates through stack sets in the account
 * Supports filtering by status and call context
 */
class ListStackSetsPaginator implements Paginator<ListStackSetsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListStackSetsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListStackSetsCommandOutput>;
}

/**
 * Paginates through stack instances in a stack set
 * Supports filtering by account, region, and status
 */
class ListStackInstancesPaginator implements Paginator<ListStackInstancesCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListStackInstancesCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListStackInstancesCommandOutput>;
}

/**
 * Paginates through stack set operations
 * Shows history of stack set management operations
 */
class ListStackSetOperationsPaginator implements Paginator<ListStackSetOperationsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListStackSetOperationsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListStackSetOperationsCommandOutput>;
}

Usage Examples:

// Monitor stack events in real-time
async function monitorStackEvents(stackName: string) {
  const eventsPaginator = new DescribeStackEventsPaginator(
    { client, pageSize: 100 },
    { StackName: stackName }
  );
  
  for await (const page of eventsPaginator) {
    if (page.StackEvents) {
      // Process events in reverse chronological order (most recent first)
      page.StackEvents.forEach(event => {
        console.log(`${event.Timestamp}: ${event.LogicalResourceId} - ${event.ResourceStatus}`);
        if (event.ResourceStatusReason) {
          console.log(`  Reason: ${event.ResourceStatusReason}`);
        }
      });
    }
  }
}

// Analyze resources across multiple stacks
async function analyzeStackResources() {
  const stacksPaginator = new ListStacksPaginator(
    { client },
    { StackStatusFilter: ["CREATE_COMPLETE", "UPDATE_COMPLETE"] }
  );
  
  const resourceCounts = new Map<string, number>();
  
  for await (const stacksPage of stacksPaginator) {
    if (stacksPage.StackSummaries) {
      for (const stack of stacksPage.StackSummaries) {
        const resourcesPaginator = new ListStackResourcesPaginator(
          { client },
          { StackName: stack.StackName! }
        );
        
        for await (const resourcesPage of resourcesPaginator) {
          if (resourcesPage.StackResourceSummaries) {
            resourcesPage.StackResourceSummaries.forEach(resource => {
              const count = resourceCounts.get(resource.ResourceType!) || 0;
              resourceCounts.set(resource.ResourceType!, count + 1);
            });
          }
        }
      }
    }
  }
  
  console.log("Resource type usage across all stacks:");
  resourceCounts.forEach((count, type) => {
    console.log(`${type}: ${count}`);
  });
}

Registry and Type Pagination

/**
 * Paginates through registered types
 * Supports filtering by visibility, type, and other criteria
 */
class ListTypesPaginator implements Paginator<ListTypesCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListTypesCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListTypesCommandOutput>;
}

/**
 * Paginates through versions of a specific type
 * Shows version history and status information
 */
class ListTypeVersionsPaginator implements Paginator<ListTypeVersionsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListTypeVersionsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListTypeVersionsCommandOutput>;
}

/**
 * Paginates through type registration operations
 * Shows registration history and status
 */
class ListTypeRegistrationsPaginator implements Paginator<ListTypeRegistrationsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListTypeRegistrationsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListTypeRegistrationsCommandOutput>;
}

Import and Export Pagination

/**
 * Paginates through CloudFormation exports
 * Lists all cross-stack exports in the region
 */
class ListExportsPaginator implements Paginator<ListExportsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListExportsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListExportsCommandOutput>;
}

/**
 * Paginates through stack import operations
 * Shows history of resource import operations
 */
class ListImportsPaginator implements Paginator<ListImportsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListImportsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListImportsCommandOutput>;
}

Generated Templates Pagination

/**
 * Paginates through generated templates
 * Lists all generated templates in the region
 */
class ListGeneratedTemplatesPaginator implements Paginator<ListGeneratedTemplatesCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListGeneratedTemplatesCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListGeneratedTemplatesCommandOutput>;
}

Stack Refactor Pagination

/**
 * Paginates through stack refactor operations
 * Lists all refactor operations in the region
 */
class ListStackRefactorsPaginator implements Paginator<ListStackRefactorsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListStackRefactorsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListStackRefactorsCommandOutput>;
}

/**
 * Paginates through actions in a stack refactor
 * Shows detailed steps in refactor execution
 */
class ListStackRefactorActionsPaginator implements Paginator<ListStackRefactorActionsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListStackRefactorActionsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListStackRefactorActionsCommandOutput>;
}

Resource Scanning Pagination

/**
 * Paginates through resource scans
 * Lists infrastructure scanning operations
 */
class ListResourceScansPaginator implements Paginator<ListResourceScansCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListResourceScansCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListResourceScansCommandOutput>;
}

/**
 * Paginates through resources found in a scan
 * Shows detailed resource discovery results
 */
class ListResourceScanResourcesPaginator implements Paginator<ListResourceScanResourcesCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListResourceScanResourcesCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListResourceScanResourcesCommandOutput>;
}

/**
 * Paginates through related resources in a scan
 * Shows resource relationships and dependencies
 */
class ListResourceScanRelatedResourcesPaginator implements Paginator<ListResourceScanRelatedResourcesCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: ListResourceScanRelatedResourcesCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<ListResourceScanRelatedResourcesCommandOutput>;
}

Additional Pagination

/**
 * Paginates through account limits
 * Shows CloudFormation service limits and usage
 */
class DescribeAccountLimitsPaginator implements Paginator<DescribeAccountLimitsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: DescribeAccountLimitsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<DescribeAccountLimitsCommandOutput>;
}

/**
 * Paginates through stack resource drift information
 * Shows detailed drift analysis for resources
 */
class DescribeStackResourceDriftsPaginator implements Paginator<DescribeStackResourceDriftsCommandOutput> {
  constructor(
    config: PaginationConfiguration,
    input: DescribeStackResourceDriftsCommandInput
  );
  
  async *[Symbol.asyncIterator](): AsyncIterator<DescribeStackResourceDriftsCommandOutput>;
}

Waiters

CloudFormation waiters provide polling mechanisms for asynchronous operations, automatically handling retries and timeouts.

Waiter Configuration

/**
 * Base configuration for CloudFormation waiters
 * Controls polling behavior and timeout settings
 */
interface WaiterConfiguration<ClientType = CloudFormationClient> {
  /** CloudFormation client instance */
  client: ClientType;
  
  /** Maximum time to wait in seconds (default: varies by waiter) */
  maxWaitTime?: number;
  
  /** Minimum delay between checks in seconds (default: varies by waiter) */
  minDelay?: number;
  
  /** Maximum delay between checks in seconds (default: varies by waiter) */
  maxDelay?: number;
}

/**
 * Result of a waiter operation
 * Indicates success, failure, or timeout
 */
interface WaiterResult {
  /** Final state of the waiter */
  state: WaiterState;
  
  /** Reason for the final state */
  reason?: any;
}

type WaiterState = 
  | "SUCCESS"
  | "FAILURE" 
  | "RETRY"
  | "TIMEOUT"
  | "ABORTED";

Stack Operation Waiters

/**
 * Waits for stack creation to complete successfully
 * Polls until stack reaches CREATE_COMPLETE or fails
 */
function waitForStackCreateComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStacksCommandInput
): Promise<WaiterResult>;

/**
 * Waits for stack update to complete successfully
 * Polls until stack reaches UPDATE_COMPLETE or fails
 */
function waitForStackUpdateComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStacksCommandInput
): Promise<WaiterResult>;

/**
 * Waits for stack deletion to complete
 * Polls until stack no longer exists or fails to delete
 */
function waitForStackDeleteComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStacksCommandInput
): Promise<WaiterResult>;

/**
 * Waits for stack rollback to complete
 * Polls until rollback reaches final state
 */
function waitForStackRollbackComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStacksCommandInput
): Promise<WaiterResult>;

/**
 * Waits for a stack to exist
 * Useful when waiting for stack creation to begin
 */
function waitForStackExists(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStacksCommandInput
): Promise<WaiterResult>;

/**
 * Waits for stack import operation to complete
 * Polls during import resource operations
 */
function waitForStackImportComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStacksCommandInput
): Promise<WaiterResult>;

/**
 * Waits for stack refactor creation to complete
 * Polls during stack refactor preparation phase
 */
function waitForStackRefactorCreateComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStackRefactorCommandInput
): Promise<WaiterResult>;

/**
 * Waits for stack refactor execution to complete
 * Polls during actual resource movement operations
 */
function waitForStackRefactorExecuteComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStackRefactorCommandInput
): Promise<WaiterResult>;

Change Set Waiters

/**
 * Waits for change set creation to complete
 * Polls until change set is ready for execution or fails
 */
function waitForChangeSetCreateComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeChangeSetCommandInput
): Promise<WaiterResult>;

Type Registration Waiters

/**
 * Waits for type registration to complete
 * Polls during custom resource type registration
 */
function waitForTypeRegistrationComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeTypeRegistrationCommandInput
): Promise<WaiterResult>;

Usage Examples:

import { 
  CloudFormationClient,
  CreateStackCommand,
  UpdateStackCommand,
  DeleteStackCommand,
  waitForStackCreateComplete,
  waitForStackUpdateComplete,
  waitForStackDeleteComplete,
  WaiterResult
} from "@aws-sdk/client-cloudformation";

const client = new CloudFormationClient({ region: "us-east-1" });

// Create stack and wait for completion
async function createStackAndWait(stackName: string, templateBody: string) {
  console.log(`Creating stack: ${stackName}`);
  
  const createCommand = new CreateStackCommand({
    StackName: stackName,
    TemplateBody: templateBody,
    Capabilities: ["CAPABILITY_IAM"]
  });
  
  await client.send(createCommand);
  
  // Wait for creation to complete (default timeout: 120 minutes)
  console.log("Waiting for stack creation to complete...");
  const result = await waitForStackCreateComplete(
    {
      client,
      maxWaitTime: 3600, // 1 hour timeout
      minDelay: 15,      // Check every 15 seconds minimum
      maxDelay: 60       // Maximum 60 seconds between checks
    },
    { StackName: stackName }
  );
  
  if (result.state === "SUCCESS") {
    console.log(`Stack ${stackName} created successfully`);
    return true;
  } else {
    console.error(`Stack creation failed: ${result.reason}`);
    return false;
  }
}

// Update stack with rollback handling
async function updateStackSafely(stackName: string, templateBody: string) {
  try {
    const updateCommand = new UpdateStackCommand({
      StackName: stackName,
      TemplateBody: templateBody,
      Capabilities: ["CAPABILITY_IAM"]
    });
    
    await client.send(updateCommand);
    
    console.log("Waiting for stack update to complete...");
    const result = await waitForStackUpdateComplete(
      { 
        client,
        maxWaitTime: 2400 // 40 minutes
      },
      { StackName: stackName }
    );
    
    if (result.state === "SUCCESS") {
      console.log("Stack update completed successfully");
      return true;
    } else {
      console.log("Stack update failed, waiting for rollback...");
      
      const rollbackResult = await waitForStackRollbackComplete(
        { client },
        { StackName: stackName }
      );
      
      if (rollbackResult.state === "SUCCESS") {
        console.log("Stack rollback completed");
      }
      return false;
    }
  } catch (error) {
    console.error("Update failed:", error);
    return false;
  }
}

// Delete stack with verification
async function deleteStackCompletely(stackName: string) {
  const deleteCommand = new DeleteStackCommand({
    StackName: stackName
  });
  
  await client.send(deleteCommand);
  
  console.log(`Waiting for stack ${stackName} to be deleted...`);
  const result = await waitForStackDeleteComplete(
    { 
      client,
      maxWaitTime: 1800 // 30 minutes
    },
    { StackName: stackName }
  );
  
  return result.state === "SUCCESS";
}

Change Set Waiters

/**
 * Waits for change set creation to complete
 * Polls until change set is available for review
 */
function waitForChangeSetCreateComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeChangeSetCommandInput
): Promise<WaiterResult>;

Type Registration Waiters

/**
 * Waits for type registration to complete
 * Polls registration status until success or failure
 */
function waitForTypeRegistrationComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeTypeRegistrationCommandInput
): Promise<WaiterResult>;

Stack Refactor Waiters

/**
 * Waits for stack refactor creation to complete
 * Used with CloudFormation refactoring operations
 */
function waitForStackRefactorCreateComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStackRefactorCommandInput
): Promise<WaiterResult>;

/**
 * Waits for stack refactor execution to complete
 * Monitors refactor operation progress
 */
function waitForStackRefactorExecuteComplete(
  params: WaiterConfiguration<CloudFormationClient>,
  input: DescribeStackRefactorCommandInput
): Promise<WaiterResult>;

Advanced Usage Examples:

// Parallel stack operations with waiters
async function deployMultipleStacks(stackConfigs: Array<{name: string, template: string}>) {
  const operations = stackConfigs.map(async (config) => {
    try {
      // Create stack
      await client.send(new CreateStackCommand({
        StackName: config.name,
        TemplateBody: config.template,
        Capabilities: ["CAPABILITY_IAM"]
      }));
      
      // Wait for completion
      const result = await waitForStackCreateComplete(
        { client, maxWaitTime: 1800 },
        { StackName: config.name }
      );
      
      return {
        stackName: config.name,
        success: result.state === "SUCCESS",
        error: result.state !== "SUCCESS" ? result.reason : null
      };
    } catch (error) {
      return {
        stackName: config.name,
        success: false,
        error: error
      };
    }
  });
  
  const results = await Promise.all(operations);
  
  console.log("Deployment Results:");
  results.forEach(result => {
    console.log(`${result.stackName}: ${result.success ? 'SUCCESS' : 'FAILED'}`);
    if (!result.success && result.error) {
      console.log(`  Error: ${result.error}`);
    }
  });
  
  return results;
}

// Custom waiter with progress tracking
async function waitWithProgress<T>(
  waiterFn: Promise<WaiterResult>,
  progressCallback: (elapsed: number) => void
): Promise<WaiterResult> {
  const startTime = Date.now();
  let progressInterval: NodeJS.Timeout;
  
  // Update progress every 30 seconds
  progressInterval = setInterval(() => {
    const elapsed = Math.floor((Date.now() - startTime) / 1000);
    progressCallback(elapsed);
  }, 30000);
  
  try {
    const result = await waiterFn;
    clearInterval(progressInterval);
    
    const totalTime = Math.floor((Date.now() - startTime) / 1000);
    progressCallback(totalTime);
    
    return result;
  } catch (error) {
    clearInterval(progressInterval);
    throw error;
  }
}

// Usage with progress tracking
const result = await waitWithProgress(
  waitForStackCreateComplete(
    { client },
    { StackName: "my-large-stack" }
  ),
  (elapsed) => {
    console.log(`Stack creation in progress... ${elapsed} seconds elapsed`);
  }
);

Utility Functions

/**
 * Collects all items from a paginator into a single array
 * Useful for small result sets that fit in memory
 */
async function collectPaginatorResults<T>(
  paginator: Paginator<T>
): Promise<T[]> {
  const results: T[] = [];
  for await (const page of paginator) {
    results.push(page);
  }
  return results;
}

/**
 * Processes paginated results with a callback function
 * Memory efficient for large result sets
 */
async function processPaginatedResults<T>(
  paginator: Paginator<T>,
  processor: (page: T) => Promise<void> | void
): Promise<void> {
  for await (const page of paginator) {
    await processor(page);
  }
}

Best Practices

Pagination Strategies

  • Use async iteration for memory-efficient processing of large result sets
  • Set appropriate page sizes based on your use case and API limits
  • Handle pagination errors gracefully with retry logic
  • Consider caching strategies for frequently accessed data

Waiter Configuration

  • Set realistic timeouts based on expected operation duration
  • Use appropriate polling intervals to balance responsiveness and API usage
  • Implement proper error handling for waiter failures and timeouts
  • Consider using parallel operations where appropriate

Performance Optimization

  • Process paginated results as they arrive rather than collecting all in memory
  • Use filtering at the API level when possible to reduce data transfer
  • Implement circuit breakers for resilient waiter operations
  • Monitor API usage to stay within service limits

Error Handling and Resilience

  • Implement exponential backoff for failed operations
  • Handle rate limiting and throttling appropriately
  • Use timeout values appropriate for your application's needs
  • Log waiter progress and failures for debugging

Resource Management

  • Clean up resources if waiter operations fail
  • Implement proper cleanup in case of application termination
  • Use appropriate timeouts to prevent indefinite waiting
  • Monitor long-running operations for resource consumption