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Product Delivery API Basics

Product API Basics covers the admin API used for creating and managing products. To display product data in your storefront, you must use the Product Delivery API. Call the headless-commerce-delivery-catalog services to retrieve a single product from a channel or all products from a channel.

Get a Product from a Channel

Start a new Liferay DXP instance by running

docker run -it -m 8g -p 8080:8080 liferay/dxp:2025.q1.6-lts

Sign in to Liferay at http://localhost:8080 using the email address test@liferay.com and the password test. When prompted, change the password to learn.

Then follow these steps:

Download and unzip Product Delivery API Basics.

curl https://resources.learn.liferay.com/commerce/latest/en/product-management/developer-guide/liferay-k9b9.zip -O

unzip liferay-k9b9.zip

By default, a product is visible across all channels. You can limit its visibility through configuration. See Configuring Product Visibility Using Channels for more information.

Find the channel ID by opening the Global Menu () and navigating to Commerce → Channels. Select a channel to see its ID.

Find the product ID by opening the Global Menu () and navigating to Commerce → Products. Select a product to see its ID.

Use the cURL script to retrieve a product from a channel. On the command line, navigate to the curl folder. Execute the Products_GET_ById.sh script with your channel ID and product ID as parameters. Replace 1234 with the channel ID and 5678 with the product ID.

./Products_GET_ById.sh 1234 5678

The JSON response shows the product:

{
   "catalogName": "Minium",
   "createDate": "2024-11-11T13:15:37Z",
   "customFields": [],
   "description": "Product designed and manufactured to accommodate OEM applications. All\nproducts are tested and inspected in an ISO-9000 compliant environment",
   "expando": {},
   "externalReferenceCode": "MIN93015minium-initializer",
   "id": 34309,
   "metaDescription": "",
   "metaKeyword": "",
   "metaTitle": "",
   "modifiedDate": "2024-11-11T13:35:41Z",
   "name": "ABS Sensor",
   "productConfiguration": {
      "allowBackOrder": true,
      "allowedOrderQuantities": [],
      "availabilityEstimateId": 34326,
      "availabilityEstimateName": "3-5 days",
      "inventoryEngine": "",
      "maxOrderQuantity": 10000,
      "minOrderQuantity": 1,
      "multipleOrderQuantity": 1
   },
   "productId": 34310,
   "productType": "simple",
   "shortDescription": "",
   "slug": "abs-sensor",
   "tags": [],
   "urlImage": "https://localhost:8080/o/commerce-media/default/?groupId=34197",
   "urls": {
      "en_US": "abs-sensor"
   }
}

You can also call the REST service using the Java client. Navigate out of the curl folder and into the java folder. Compile the source files:
```
javac -classpath .:* *.java
```
Run the Products_GET_ById class. Replace 1234 with the channel ID and 5678 with the product ID.
```
java -classpath .:* -DchannelId=1234 -DproductId=5678 Products_GET_ById
```

Examine the cURL Command

The Products_GET_ById.sh script calls the REST service with a cURL command.

curl \
	"http://localhost:8080/o/headless-commerce-delivery-catalog/v1.0/channels/${1}/products/${2}" \
	--user "test@liferay.com:learn"

Here are the command’s arguments:

Arguments	Description
`"http://localhost:8080/o/headless-commerce-delivery-catalog/v1.0/channels/${1}/products/${2}"`	The REST service endpoint
`-u "test@liferay.com:learn"`	Basic authentication credentials

Note

Basic authentication is used here for demonstration purposes. For production, you should authorize users via OAuth2. See Using OAuth2 to Authorize Users for a sample React application that utilizes OAuth2.

Examine the Java Class

The Products_GET_ById.java class retrieves a product from a channel by calling the product-related service.

public static void main(String[] args) throws Exception {
	ProductResource.Builder builder = ProductResource.builder();

	ProductResource productResource = builder.authentication(
		"test@liferay.com", "learn"
	).build();

	System.out.println(
		productResource.getChannelProduct(
			Long.valueOf(System.getProperty("channelId")),
			Long.valueOf(System.getProperty("productId")), null));
}

This class invokes the REST service using only three lines of code:

Line (abbreviated)	Description
`ProductResource.Builder builder = ...`	Gets a `Builder` for generating a `ProductResource` service instance.
`ProductResource productResource = builder.authentication(...).build();`	Specifies basic authentication and generates a `ProductResource` service instance.
`productResource.getChannelProduct(...);`	Calls the `productResource.getChannelProduct` method and passes the parameters to retrieve a product.

Note that the project includes the com.liferay.headless.commerce.delivery.catalog.client.jar file as a dependency. You can find client JAR dependency information for all REST applications in the API explorer in your installation at /o/api.

Note

The main method’s comment demonstrates running the class.

The other example Java class is similar to this one, but calls a different ProductResource method.

Important

See ProductResource for service details.

Below is another example of calling a Product REST service using cURL and Java.

Get all Products from a Channel

You can retrieve all products from a channel by executing the following cURL or Java command.

Products_GET_FromChannels.sh

Command:

./Products_GET_FromChannels.sh

Code:

curl \
	"http://localhost:8080/o/headless-commerce-delivery-catalog/v1.0/channels/${1}/products" \
	--user "test@liferay.com:learn"

Products_GET_FromChannels.java

Command:

java -classpath .:* Products_GET_FromChannels

Code:

public static void main(String[] args) throws Exception {
	ProductResource.Builder builder = ProductResource.builder();

	ProductResource productResource = builder.authentication(
		"test@liferay.com", "learn"
	).build();

	Page<Product> page = productResource.getChannelProductsPage(
		Long.valueOf(System.getProperty("channelId")), null, null, null,
		Pagination.of(1, 2), null);

	System.out.println(page);
}

The Product channel objects’ output is JSON.

This API also accepts parameters to filter, paginate, search, and sort the products. See the getProductsPage method for more information. You can use the following Product fields in your queries to filter, search, and sort the results.

catalogId
categoryIds
categoryNames
createDate
customFields Liferay DXP 2024.Q4+/Portal GA129+
modifiedDate
name
productType
statusCode
tags

Filter Query	Description
`productType eq 'simple'`	Product type equals simple
`contains(name, 'Bar')`	Product name contains Bar
`customFields/sampleSize eq '100.0'`	Custom field named `sampleSize` equals 100

Sort Query	Description
`createDate:desc`	Sort by `createDate` in the descending order
`name:asc`	Sort by `name` in the ascending order
`createDate:desc,name:desc`	Sort by `createDate` in the descending order first, then by name in the descending order

Read API Query Parameters for more information.

Important

Both the above endpoints also have an optional accountId parameter. When a user is part of multiple accounts, you must pass the accountId while invoking these APIs.

Consuming REST Services

Capability:

Commerce

Resource Type:

Official Documentation

Feature:

Product Information

Products

Deployment Approach:

Liferay PaaS

Liferay SaaS

Liferay Self-Hosted