com.nandanu.halomama.controller.AmazonClientManager.java Source code

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Here is the source code for com.nandanu.halomama.controller.AmazonClientManager.java

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/*
 * Copyright 2010-2012 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 * 
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

package com.nandanu.halomama.controller;

import android.content.Context;
import android.util.Log;

import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.CognitoCachingCredentialsProvider;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import com.nandanu.halomama.model.Constants;

/**
 * This class is used to get clients to the various AWS services. Before
 * accessing a client the credentials should be checked to ensure validity.
 */
public class AmazonClientManager {

    private static final String LOG_TAG = "AmazonClientManager";

    private AmazonDynamoDBClient ddb = null;
    private Context context;

    private String identityId;

    public AmazonClientManager(Context context) {
        this.context = context;
    }

    public AmazonDynamoDBClient ddb() {
        validateCredentials();
        return ddb;
    }

    public boolean hasCredentials() {
        return (!(Constants.AWS_ACCOUNT_ID.isEmpty() || Constants.COGNITO_POOL_ID.isEmpty()
                || Constants.COGNITO_ROLE_UNAUTH.isEmpty()));
    }

    public void validateCredentials() {
        if (ddb == null) {
            initClients();
        }
    }

    private void initClients() {
        // CognitoCachingCredentialsProvider credentials = new
        // CognitoCachingCredentialsProvider(
        // context, Constants.AWS_ACCOUNT_ID, Constants.COGNITO_POOL_ID,
        // Constants.COGNITO_ROLE_UNAUTH, null, Constants.COGNITO_REGION);

        CognitoCachingCredentialsProvider credentials = new CognitoCachingCredentialsProvider(context,
                Constants.AWS_ACCOUNT_ID, Constants.COGNITO_POOL_ID, Constants.COGNITO_ROLE_UNAUTH, null,
                Constants.COGNITO_REGION);

        ddb = new AmazonDynamoDBClient(credentials);
        ddb.setRegion(Region.getRegion(Constants.DDB_REGION));

        identityId = credentials.getIdentityId();
    }

    public boolean wipeCredentialsOnAuthError(AmazonServiceException ex) {
        Log.e(LOG_TAG, "Error, wipeCredentialsOnAuthError called" + ex);
        if (
        // STS
        // http://docs.amazonwebservices.com/STS/latest/APIReference/CommonErrors.html
        ex.getErrorCode().equals("IncompleteSignature") || ex.getErrorCode().equals("InternalFailure")
                || ex.getErrorCode().equals("InvalidClientTokenId") || ex.getErrorCode().equals("OptInRequired")
                || ex.getErrorCode().equals("RequestExpired") || ex.getErrorCode().equals("ServiceUnavailable")

                // DynamoDB
                // http://docs.amazonwebservices.com/amazondynamodb/latest/developerguide/ErrorHandling.html#APIErrorTypes
                || ex.getErrorCode().equals("AccessDeniedException")
                || ex.getErrorCode().equals("IncompleteSignatureException")
                || ex.getErrorCode().equals("MissingAuthenticationTokenException")
                || ex.getErrorCode().equals("ValidationException") || ex.getErrorCode().equals("InternalFailure")
                || ex.getErrorCode().equals("InternalServerError")) {

            return true;
        }

        return false;
    }

    public String getIdentityId() {
        return identityId;
    }
}