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Current Implementation

I have implemented file upload functionality using AWS Mobile SDK and according to their documentation, we have to store an awsconfiguration.json file (this file contains CognitoIdentity,IdentityManager & S3TransferUtility) and we create an instance of TransferUtility like this for uploading :

TransferUtility transferUtility = TransferUtility.builder()

            .context(getApplicationContext())

            .awsConfiguration(AWSMobileClient.getInstance().getConfiguration())

            .s3Client(new AmazonS3Client(AWSMobileClient.getInstance()))

            .build();

This implementation works great when we have just one AWS Instance

Required Implementation

I have a requirement where i have to implement this for more than one AWS Instance. To explain better, we have more than one AWS account for different clients and each account will have their own s3 bucket.

Now i have to upload files based on the type of client i logged in within my app. This means that their awsconfiguration.json file will be different for each client.

Question

Is there any method by which i can dynamically generate awsconfiguration.json or better yet, pass values for fields like CognitoIdentity & S3TransferUtility when uploading file?

You can add the aws configuration manually without using the awsconfiguration.json

build.gradle

implementation 'com.amazonaws:aws-android-sdk-core:2.6.+'

implementation 'com.amazonaws:aws-android-sdk-s3:2.6.+'

implementation 'com.amazonaws:aws-android-sdk-ddb:2.6.+'

This is for ClientConfiguration part of AWS

ClientConfiguration clientConfiguration = new ClientConfiguration();

clientConfiguration.setMaxErrorRetry(0);

clientConfiguration.setConnectionTimeout(3600000);

clientConfiguration.setSocketTimeout(3600000);

This is your CongnitoIdentity Part

Now get the bucketNameS3, accessKey and secretKey from some api which you can set dynamic for dynamic account.

String bucketNameS3 = "something";

String accessKey = "something";

String secretKey = "something";

Set all this value in BasicAWSCredentials object like

BasicAWSCredentials basicAWSCredentials = new BasicAWSCredentials(accessKey, secretKey);

Next step is your AmazonS3Client object

AmazonS3Client amazonS3Client = new AmazonS3Client(basicAWSCredentials, clientConfiguration);

Here you can add the Regions to your AmazonS3Client you just have to create the object and pass it in your amazonS3Client.

Regions

Regions regions = Regions.fromName("your region name");

amazonS3Client.setRegion(Region.getRegion(regions));

Your TransferUtility Part

TransferUtilityOptions options = new TransferUtilityOptions();

options.setTransferThreadPoolSize(1);

options.setTransferServiceCheckTimeInterval(30 * 1000); // 30-second

TransferUtility transferUtility = TransferUtility.builder()

                        .context(getApplicationContext())

                        .s3Client(amazonS3Client)

                        .transferUtilityOptions(options)

                        .defaultBucket(bucketNameS3)

                        .build();