AWS Lambda SDK for Java

<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-java-sdk-lambda</artifactId>
    <version>1.12.791-SNAPSHOT</version>
</dependency>

import com.amazonaws.services.lambda.AWSLambda;
import com.amazonaws.services.lambda.AWSLambdaClientBuilder;
import com.amazonaws.services.lambda.model.*;

import com.amazonaws.services.lambda.AWSLambdaAsync;
import com.amazonaws.services.lambda.AWSLambdaAsyncClientBuilder;

import com.amazonaws.services.lambda.invoke.LambdaInvokerFactory;
import com.amazonaws.services.lambda.invoke.LambdaFunction;

import com.amazonaws.services.lambda.*;
import com.amazonaws.services.lambda.model.*;

// Create synchronous client
AWSLambda lambdaClient = AWSLambdaClientBuilder.standard()
    .withRegion("us-east-1")
    .build();

// List functions
ListFunctionsResult functions = lambdaClient.listFunctions();
for (FunctionConfiguration function : functions.getFunctions()) {
    System.out.println(function.getFunctionName());
}

// Invoke a function
InvokeRequest invokeRequest = new InvokeRequest()
    .withFunctionName("my-function")
    .withPayload("{\"key\":\"value\"}");
    
InvokeResult result = lambdaClient.invoke(invokeRequest);
System.out.println(new String(result.getPayload().array()));

public interface AWSLambda {
    String ENDPOINT_PREFIX = "lambda";
    // 67 service operations...
}

public interface AWSLambdaAsync extends AWSLambda {
    // Async versions of all operations returning Future<T>
}

CreateFunctionResult createFunction(CreateFunctionRequest request);
GetFunctionResult getFunction(GetFunctionRequest request);
UpdateFunctionCodeResult updateFunctionCode(UpdateFunctionCodeRequest request);
UpdateFunctionConfigurationResult updateFunctionConfiguration(UpdateFunctionConfigurationRequest request);
DeleteFunctionResult deleteFunction(DeleteFunctionRequest request);
ListFunctionsResult listFunctions(ListFunctionsRequest request);

InvokeResult invoke(InvokeRequest request);
InvokeAsyncResult invokeAsync(InvokeAsyncRequest request); // Deprecated

CreateEventSourceMappingResult createEventSourceMapping(CreateEventSourceMappingRequest request);
GetEventSourceMappingResult getEventSourceMapping(GetEventSourceMappingRequest request);
UpdateEventSourceMappingResult updateEventSourceMapping(UpdateEventSourceMappingRequest request);
DeleteEventSourceMappingResult deleteEventSourceMapping(DeleteEventSourceMappingRequest request);
ListEventSourceMappingsResult listEventSourceMappings(ListEventSourceMappingsRequest request);

PublishVersionResult publishVersion(PublishVersionRequest request);
CreateAliasResult createAlias(CreateAliasRequest request);
UpdateAliasResult updateAlias(UpdateAliasRequest request);
ListVersionsByFunctionResult listVersionsByFunction(ListVersionsByFunctionRequest request);
ListAliasesResult listAliases(ListAliasesRequest request);

PublishLayerVersionResult publishLayerVersion(PublishLayerVersionRequest request);
GetLayerVersionResult getLayerVersion(GetLayerVersionRequest request);
DeleteLayerVersionResult deleteLayerVersion(DeleteLayerVersionRequest request);
ListLayersResult listLayers(ListLayersRequest request);
ListLayerVersionsResult listLayerVersions(ListLayerVersionsRequest request);

PutFunctionConcurrencyResult putFunctionConcurrency(PutFunctionConcurrencyRequest request);
GetFunctionConcurrencyResult getFunctionConcurrency(GetFunctionConcurrencyRequest request);
PutProvisionedConcurrencyConfigResult putProvisionedConcurrencyConfig(PutProvisionedConcurrencyConfigRequest request);
GetProvisionedConcurrencyConfigResult getProvisionedConcurrencyConfig(GetProvisionedConcurrencyConfigRequest request);

CreateCodeSigningConfigResult createCodeSigningConfig(CreateCodeSigningConfigRequest request);
PutFunctionCodeSigningConfigResult putFunctionCodeSigningConfig(PutFunctionCodeSigningConfigRequest request);
GetCodeSigningConfigResult getCodeSigningConfig(GetCodeSigningConfigRequest request);
ListCodeSigningConfigsResult listCodeSigningConfigs(ListCodeSigningConfigsRequest request);

AddPermissionResult addPermission(AddPermissionRequest request);
RemovePermissionResult removePermission(RemovePermissionRequest request);
GetPolicyResult getPolicy(GetPolicyRequest request);

public class LambdaInvokerFactory {
    public static LambdaInvokerFactoryConfig builder();
    public <T> T build(Class<T> interfaceClass);
}

public @interface LambdaFunction {
    String functionName() default "";
}

public class AWSLambdaWaiters {
    public Waiter<GetFunctionRequest> functionExists();
    public Waiter<GetFunctionConfigurationRequest> functionActive();
    public Waiter<GetFunctionConfigurationRequest> functionUpdated();
    public Waiter<GetFunctionConfigurationRequest> publishedVersionActive();
}

CreateFunctionUrlConfigResult createFunctionUrlConfig(CreateFunctionUrlConfigRequest request);
GetFunctionUrlConfigResult getFunctionUrlConfig(GetFunctionUrlConfigRequest request);
UpdateFunctionUrlConfigResult updateFunctionUrlConfig(UpdateFunctionUrlConfigRequest request);
DeleteFunctionUrlConfigResult deleteFunctionUrlConfig(DeleteFunctionUrlConfigRequest request);
ListFunctionUrlConfigsResult listFunctionUrlConfigs(ListFunctionUrlConfigsRequest request);

GetRuntimeManagementConfigResult getRuntimeManagementConfig(GetRuntimeManagementConfigRequest request);
PutRuntimeManagementConfigResult putRuntimeManagementConfig(PutRuntimeManagementConfigRequest request);

GetAccountSettingsResult getAccountSettings(GetAccountSettingsRequest request);

TagResourceResult tagResource(TagResourceRequest request);
UntagResourceResult untagResource(UntagResourceRequest request);
ListTagsResult listTags(ListTagsRequest request);

// Core configuration types
public class FunctionConfiguration {
    private String functionName;
    private String functionArn;
    private Runtime runtime;
    private String role;
    private String handler;
    private Long codeSize;
    private String description;
    private Integer timeout;
    private Integer memorySize;
    private String lastModified;
    private String codeSha256;
    private String version;
    // ... getters and setters
}

public class FunctionCode {
    private String zipFile;
    private String s3Bucket;
    private String s3Key;
    private String s3ObjectVersion;
    private String imageUri;
    // ... getters and setters
}

// Request/Result pattern
public class CreateFunctionRequest {
    private String functionName;
    private Runtime runtime;
    private String role;
    private String handler;
    private FunctionCode code;
    private String description;
    private Integer timeout;
    private Integer memorySize;
    // ... getters and setters
}

// Enumerations
public enum InvocationType {
    Event, RequestResponse, DryRun
}

public enum LogType {
    None, Tail
}

public enum Runtime {
    Nodejs("nodejs"),
    Nodejs43("nodejs4.3"), 
    Nodejs610("nodejs6.10"),
    Nodejs810("nodejs8.10"),
    Nodejs10X("nodejs10.x"),
    Nodejs12X("nodejs12.x"),
    Nodejs14X("nodejs14.x"),
    Nodejs16X("nodejs16.x"),
    Nodejs18X("nodejs18.x"),
    Nodejs20X("nodejs20.x"),
    Java8("java8"),
    Java8Al2("java8.al2"),
    Java11("java11"),
    Java17("java17"),
    Java21("java21"),
    Python27("python2.7"),
    Python36("python3.6"),
    Python37("python3.7"),
    Python38("python3.8"),
    Python39("python3.9"),
    Python310("python3.10"),
    Python311("python3.11"),
    Python312("python3.12"),
    Dotnetcore10("dotnetcore1.0"),
    Dotnetcore20("dotnetcore2.0"),
    Dotnetcore21("dotnetcore2.1"),
    Dotnetcore31("dotnetcore3.1"),
    Dotnet6("dotnet6"),
    Dotnet8("dotnet8"),
    Go1X("go1.x"),
    Ruby25("ruby2.5"),
    Ruby27("ruby2.7"),
    Ruby32("ruby3.2"),
    Ruby33("ruby3.3"),
    Provided("provided"),
    ProvidedAl2("provided.al2"),
    ProvidedAl2023("provided.al2023")
}