There are more AWS SDK examples available in the [AWS Doc SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples) GitHub repo.

# Describe all entities in a single call using an AWS SDK
<a name="marketplace-catalog_example_marketplace-catalog_BatchDescribeEntities_section"></a>

The following code examples show how to describe all entities in a single call.

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#### [ Java ]

**SDK for Java 2.x**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Marketplace API Reference Code Library](https://github.com/aws-samples/aws-marketplace-reference-code/tree/main/java#catalog-api-reference-code) repository. 

```
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package com.example.awsmarketplace.catalogapi;

import static com.example.awsmarketplace.utils.ReferenceCodesConstants.*;
import com.example.awsmarketplace.utils.ReferenceCodesUtils;

import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
import software.amazon.awssdk.http.apache.ApacheHttpClient;
import software.amazon.awssdk.services.marketplacecatalog.MarketplaceCatalogClient;
import software.amazon.awssdk.services.marketplacecatalog.model.BatchDescribeEntitiesRequest;
import software.amazon.awssdk.services.marketplacecatalog.model.EntityRequest;
import software.amazon.awssdk.services.marketplacecatalog.model.BatchDescribeEntitiesResponse;
import software.amazon.awssdk.services.marketplacecatalog.model.EntityDetail;
import software.amazon.awssdk.services.marketplacecatalog.model.BatchDescribeErrorDetail;

import java.util.Arrays;
import java.util.Map;

public class BatchDescribeEntities {

    /*
     * BatchDescribe my entities in a single call and
     *  check if it contains all the information I need to know about the entities.
     */
    public static void main(String[] args) {

        MarketplaceCatalogClient marketplaceCatalogClient =
                MarketplaceCatalogClient.builder()
                        .httpClient(ApacheHttpClient.builder().build())
                        .credentialsProvider(ProfileCredentialsProvider.create())
                        .build();

        BatchDescribeEntitiesRequest batchDescribeEntitiesRequest =
                BatchDescribeEntitiesRequest.builder()
                        .entityRequestList(Arrays.asList(
                                EntityRequest.builder()
                                        .catalog(AWS_MP_CATALOG).entityId(OFFER_ID)
                                        .build(),
                                EntityRequest.builder()
                                        .catalog(AWS_MP_CATALOG).entityId(PRODUCT_ID)
                                        .build()))
                        .build();

        BatchDescribeEntitiesResponse batchDescribeEntitiesResponse = marketplaceCatalogClient.batchDescribeEntities(batchDescribeEntitiesRequest);

        // Reading the successful entities response
        Map<String, EntityDetail> entityDetailsMap = batchDescribeEntitiesResponse.entityDetails();
        for (Map.Entry<String, EntityDetail> entry : entityDetailsMap.entrySet()) {
            System.out.println("EntityId: " + entry.getKey());
            ReferenceCodesUtils.formatOutput(entry.getValue());
        }

        // Logging the failed entities error details
        Map<String, BatchDescribeErrorDetail> entityErrorsMap = batchDescribeEntitiesResponse.errors();
        for (Map.Entry<String, BatchDescribeErrorDetail> entry : entityErrorsMap.entrySet()) {
            System.out.println(String.format("EntityId: %s, ErrorCode: %s, ErrorMessage: %s", entry.getKey(),
                    entry.getValue().errorCode(), entry.getValue().errorMessage()));
        }
    }
}
```
+  For API details, see [BatchDescribeEntities](https://docs.aws.amazon.com/goto/SdkForJavaV2/marketplace-catalog-2018-09-17/BatchDescribeEntities) in *AWS SDK for Java 2.x API Reference*. 

------
#### [ Python ]

**SDK for Python (Boto3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Marketplace API Reference Code Library](https://github.com/aws-samples/aws-marketplace-reference-code/blob/main/python##catalog-api-reference-code) repository. 

```
"""
Purpose
Shows how to use the AWS SDK for Python (Boto3) to describe for multiple entities information in the AWS Marketplace Catalog
CAPI-98
"""

import json
import logging

import boto3
from botocore.exceptions import ClientError

logger = logging.getLogger(__name__)

PRODUCT_ID = "prod-1111111111111"
OFFER_ID = "offer-1111111111111"
MARKETPLACE_CATALOG = "AWSMarketplace"


def pretty_print(response):
    json_object = json.dumps(response, indent=4)
    print(json_object)


def get_entities_information(mp_client):
    """
    Returns information about a given product
    Args: entity_id str: Entity to return
    Returns: dict: Dictionary of product information
    """

    entity_request_list_param = [
        {'EntityId': PRODUCT_ID, 'Catalog': MARKETPLACE_CATALOG},
        {'EntityId': OFFER_ID, 'Catalog': MARKETPLACE_CATALOG}
    ]
    try:
        response = mp_client.batch_describe_entities(
            EntityRequestList=entity_request_list_param
        )

        return response

    except ClientError as e:
        logger.exception("Unexpected error: %s", e)
        raise


def usage_demo():
    logging.basicConfig(level=logging.INFO, format="%(levelname)s: %(message)s")

    print("-" * 88)
    print("Looking for entities in the AWS Marketplace Catalog.")
    print("-" * 88)

    mp_client = boto3.client("marketplace-catalog")

    response = get_entities_information(mp_client)
    print("Successful entities response -")
    pretty_print(response["EntityDetails"])
    print("Failed entities response -")
    pretty_print(response["Errors"])


if __name__ == "__main__":
    usage_demo()
```
+  For API details, see [BatchDescribeEntities](https://docs.aws.amazon.com/goto/boto3/marketplace-catalog-2018-09-17/BatchDescribeEntities) in *AWS SDK for Python (Boto3) API Reference*. 

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