Example usage for com.amazonaws.services.dynamodbv2 AmazonDynamoDBClient updateItem

Introduction

In this page you can find the example usage for com.amazonaws.services.dynamodbv2 AmazonDynamoDBClient updateItem.

Prototype

@Override
public UpdateItemResult updateItem(UpdateItemRequest request) 

Source Link

Document

Edits an existing item's attributes, or adds a new item to the table if it does not already exist.

Usage

From source file:awslabs.lab22.SolutionCode.java

License:Open Source License

@Override
public void updateIfMatch(AmazonDynamoDBClient ddbClient, String tableName, String email, String company,
        String firstNameTarget, String firstNameMatch) {
    // Construct an UpdateItemRequest object for the specified table.
    UpdateItemRequest updateItemRequest = new UpdateItemRequest().withTableName(tableName);

    // Add KeyEntry elements to the request containing AttributeValue objects for the company name and email
    // address provided.
    updateItemRequest.addKeyEntry("Company", new AttributeValue().withS(company));
    updateItemRequest.addKeyEntry("Email", new AttributeValue().withS(email));

    // Add an ExpectedEntry element to the request containing an ExpectedAttributeValue object that contains
    // the value in the firstNameMatch parameter.
    updateItemRequest.addExpectedEntry("First",
            new ExpectedAttributeValue().withValue(new AttributeValue().withS(firstNameMatch)));

    // Add an AttributeUpdatesEntry element to the request containing an AttributeValueUpdate object that
    // contains the value in the firstNameTarget parameter
    updateItemRequest.addAttributeUpdatesEntry("First", new AttributeValueUpdate().withAction("PUT")
            .withValue(new AttributeValue().withS(firstNameTarget)));

    // Submit the request using the updateItem method of the ddbClient object.
    ddbClient.updateItem(updateItemRequest);
}

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