Compatibility with spring-data-rest

[derjust]

Migration of michaellavelle#57

[hmcmanus]

Great project. Vote +1 for this feature.

[fjvieira]

I managed a way of doing it. It is already deployed in a project I am working currently. I will put it in a pull request.

[gvasselai]

Hi @fjvieira , have you had a chance to submit the pull request? I'm also facing this problem with version 4.4.1.

[fjvieira]

Hey, @gvasselai , sorry to be late.

I provided an example project with it.

You can check it on https://github.com/affinitas/DynamoDBExample

Regards.

[gauravbrills]

Thanks @fjvieira you rock , that solved the issue with resolutions for post requests ,specially via the HAL browser .

[boothen]

The issue is because Spring Data Rest uses PersistentEntityResourceAssembler when rendering the resource. PersistentEntityResourceAssembler should use the DynamoDBMappingContext, however as this hasn't been constructed as a Spring Bean, it isn't picked up.

Simply declaring a DynamoDBMappingContext Spring Bean doesn't work either as it needs to be initialised. @fjvieira example project initialises DynamoDBMappingContext, however it means 2 separate instances of DynamoDBMappingContext are created.

If we expose the ability to inject a DynamoDBMappingContext bean into DynamoDBRepositoryConfigExtension we can avoid the initialisation code in the Application Configuration. Also, it'll mean a single instance of DynamoDBMappingContext will be used.

I've created a PR to allow the DynamoDBMappingContext to be declared as a Spring Bean and initialised correctly.

#168

If the PR is accepted, the Application Configuration for a Spring Data Rest service would be as follows:

@Configuration
@EnableDynamoDBRepositories(basePackages = "com.acme.repositories", mappingContextRef = "dynamoDBMappingContext")
public class DynamoDBConfig {

	@Value("${amazon.dynamodb.endpoint}")
	private String amazonDynamoDBEndpoint;

	@Value("${amazon.aws.accesskey}")
	private String amazonAWSAccessKey;

	@Value("${amazon.aws.secretkey}")
	private String amazonAWSSecretKey;

	@Bean
	public AmazonDynamoDB amazonDynamoDB(AWSCredentials amazonAWSCredentials) {
		AmazonDynamoDB amazonDynamoDB = new AmazonDynamoDBClient(amazonAWSCredentials);

		if (StringUtils.isNotEmpty(amazonDynamoDBEndpoint)) {
			amazonDynamoDB.setEndpoint(amazonDynamoDBEndpoint);
		}
		return amazonDynamoDB;
	}

	@Bean
	public AWSCredentials amazonAWSCredentials() {
	    // Or use an AWSCredentialsProvider/AWSCredentialsProviderChain
		return new BasicAWSCredentials(amazonAWSAccessKey, amazonAWSSecretKey);
	}

        @Bean
        public DynamoDBMappingContext dynamoDBMappingContext() {
               return new DynamoDBMappingContext();
        }
}

[derjust]

Thanks to @boothen and his PR #168 this was merged into master and will be part of the upcoming 5.0.3 release.
Documentation to be found here in the wiki.