feat(stepfunctions-tasks): allow BedrockInvokeModel to use JsonPath

packages/@aws-cdk-testing/framework-integ/test/aws-stepfunctions-tasks/test/bedrock/integ.invoke-model.js.snapshot/aws-stepfunctions-tasks-bedrock-invoke-model-integ.template.json

@@ -41,6 +41,25 @@
          ]
         ]
        }
+      },
+      {
+       "Action": [
+        "s3:GetObject",
+        "s3:PutObject"
+       ],
+       "Effect": "Allow",
+       "Resource": {
+        "Fn::Join": [
+         "",
+         [
+          "arn:",
+          {
+           "Ref": "AWS::Partition"
+          },
+          ":s3:::*"
+         ]
+        ]
+       }
       }
      ],
      "Version": "2012-10-17"
@@ -72,7 +91,19 @@
        {
         "Ref": "AWS::Region"
        },
-       "::foundation-model/amazon.titan-text-express-v1\",\"Body\":{\"inputText\":\"Generate a list of five first names.\",\"textGenerationConfig\":{\"maxTokenCount\":100,\"temperature\":1}}}},\"Prompt2\":{\"End\":true,\"Type\":\"Task\",\"ResultPath\":\"$\",\"ResultSelector\":{\"names.$\":\"$.Body.results[0].outputText\"},\"Resource\":\"arn:",
+       "::foundation-model/amazon.titan-text-express-v1\",\"Body\":{\"inputText\":\"Generate a list of five first names.\",\"textGenerationConfig\":{\"maxTokenCount\":100,\"temperature\":1}}}},\"Prompt2\":{\"Next\":\"Prompt3\",\"Type\":\"Task\",\"ResultPath\":\"$\",\"ResultSelector\":{\"names.$\":\"$.Body.results[0].outputText\"},\"Resource\":\"arn:",
+       {
+        "Ref": "AWS::Partition"
+       },
+       ":states:::bedrock:invokeModel\",\"Parameters\":{\"ModelId\":\"arn:",
+       {
+        "Ref": "AWS::Partition"
+       },
+       ":bedrock:",
+       {
+        "Ref": "AWS::Region"
+       },
+       "::foundation-model/amazon.titan-text-express-v1\",\"Body\":{\"inputText.$\":\"States.Format('Alphabetize this list of first names:\\n{}', $.names)\",\"textGenerationConfig\":{\"maxTokenCount\":100,\"temperature\":1}}}},\"Prompt3\":{\"End\":true,\"Type\":\"Task\",\"InputPath\":\"$.names\",\"OutputPath\":\"$.names\",\"Resource\":\"arn:",
        {
         "Ref": "AWS::Partition"
        },
@@ -84,7 +115,7 @@
        {
         "Ref": "AWS::Region"
        },
-       "::foundation-model/amazon.titan-text-express-v1\",\"Body\":{\"inputText.$\":\"States.Format('Alphabetize this list of first names:\\n{}', $.names)\",\"textGenerationConfig\":{\"maxTokenCount\":100,\"temperature\":1}}}}},\"TimeoutSeconds\":30}"
+       "::foundation-model/amazon.titan-text-express-v1\",\"Input\":{\"S3Uri.$\":\"$.names\"},\"Output\":{\"S3Uri.$\":\"$.names\"}}}},\"TimeoutSeconds\":30}"
       ]
      ]
     },

packages/@aws-cdk-testing/framework-integ/test/aws-stepfunctions-tasks/test/bedrock/integ.invoke-model.ts

@@ -52,7 +52,13 @@ const prompt2 = new BedrockInvokeModel(stack, 'Prompt2', {
   resultPath: '$',
 });
 
-const chain = sfn.Chain.start(prompt1).next(prompt2);
+const prompt3 = new BedrockInvokeModel(stack, 'Prompt3', {
+  model,
+  inputPath: sfn.JsonPath.stringAt('$.names'),
+  outputPath: sfn.JsonPath.stringAt('$.names'),
+});
+
+const chain = sfn.Chain.start(prompt1).next(prompt2).next(prompt3);
 
 new sfn.StateMachine(stack, 'StateMachine', {
   definitionBody: sfn.DefinitionBody.fromChainable(chain),

packages/aws-cdk-lib/aws-stepfunctions-tasks/README.md

@@ -355,6 +355,27 @@ const task = new tasks.BedrockInvokeModel(this, 'Prompt Model', {
     names: sfn.JsonPath.stringAt('$.Body.results[0].outputText'),
   },
 });
+```
+### Using Input Path
+
+Provide S3 URI as an input or output path to invoke a model
+
+```ts
+
+import * as bedrock from 'aws-cdk-lib/aws-bedrock';
+
+const model = bedrock.FoundationModel.fromFoundationModelId(
+  this,
+  'Model',
+  bedrock.FoundationModelIdentifier.AMAZON_TITAN_TEXT_G1_EXPRESS_V1,
+);
+
+const task = new tasks.BedrockInvokeModel(this, 'Prompt Model', {
+  model,
+  inputPath: sfn.JsonPath.stringAt('$.prompt'),
+  outputPath: sfn.JsonPath.stringAt('$.prompt'),
+});
+
 ```
 
 ## CodeBuild

packages/aws-cdk-lib/aws-stepfunctions-tasks/lib/bedrock/invoke-model.ts

@@ -124,12 +124,14 @@ export class BedrockInvokeModel extends sfn.TaskStateBase {
 
   constructor(scope: Construct, id: string, private readonly props: BedrockInvokeModelProps) {
     super(scope, id, props);
+
     this.integrationPattern = props.integrationPattern ?? sfn.IntegrationPattern.REQUEST_RESPONSE;
 
     validatePatternSupported(this.integrationPattern, BedrockInvokeModel.SUPPORTED_INTEGRATION_PATTERNS);
 
     const isBodySpecified = props.body !== undefined;
-    const isInputSpecified = props.input !== undefined && props.input.s3Location !== undefined;
+    //Either specific props.input with bucket name and object key or input s3 path
+    const isInputSpecified = (props.input !== undefined && props.input.s3Location !== undefined) || (props.inputPath !== undefined);
 
     if (isBodySpecified && isInputSpecified) {
       throw new Error('Either `body` or `input` must be specified, but not both.');
@@ -155,7 +157,21 @@ export class BedrockInvokeModel extends sfn.TaskStateBase {
       }),
     ];
 
-    if (this.props.input !== undefined && this.props.input.s3Location !== undefined) {
+    if (this.props.inputPath !== undefined) {
+      policyStatements.push(
+        new iam.PolicyStatement({
+          actions: ['s3:GetObject'],
+          resources: [
+            Stack.of(this).formatArn({
+              region: '',
+              account: '',
+              service: 's3',
+              resource: '*',
+            }),
+          ],
+        }),
+      );
+    } else if (this.props.input !== undefined && this.props.input.s3Location !== undefined) {
       policyStatements.push(
         new iam.PolicyStatement({
           actions: ['s3:GetObject'],
@@ -172,7 +188,21 @@ export class BedrockInvokeModel extends sfn.TaskStateBase {
       );
     }
 
-    if (this.props.output !== undefined && this.props.output.s3Location !== undefined) {
+    if (this.props.outputPath !== undefined) {
+      policyStatements.push(
+        new iam.PolicyStatement({
+          actions: ['s3:PutObject'],
+          resources: [
+            Stack.of(this).formatArn({
+              region: '',
+              account: '',
+              service: 's3',
+              resource: '*',
+            }),
+          ],
+        }),
+      );
+    } else if (this.props.output !== undefined && this.props.output.s3Location !== undefined) {
       policyStatements.push(
         new iam.PolicyStatement({
           actions: ['s3:PutObject'],
@@ -207,11 +237,13 @@ export class BedrockInvokeModel extends sfn.TaskStateBase {
         Body: this.props.body?.value,
         Input: this.props.input?.s3Location ? {
           S3Uri: `s3://${this.props.input.s3Location.bucketName}/${this.props.input.s3Location.objectKey}`,
-        } : undefined,
+        } : this.props.inputPath ? { S3Uri: this.props.inputPath } : undefined,
         Output: this.props.output?.s3Location ? {
           S3Uri: `s3://${this.props.output.s3Location.bucketName}/${this.props.output.s3Location.objectKey}`,
-        } : undefined,
+        } : this.props.outputPath ? { S3Uri: this.props.outputPath }: undefined,
       }),
     };
   }
+
 }
+