// snippet-sourcedescription:[DescribeAppState.java demonstrates how to get the migration status of an application.]
// snippet-service:[Amazon Migration Hub]
// snippet-keyword:[Java]
// snippet-keyword:[Amazon Migration Hub]
// snippet-keyword:[Code Sample]
// snippet-sourcetype:[full-example]
// snippet-sourcedate:[6-23-2020]
// snippet-sourceauthor:[scmacdon - AWS]

/**
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * This file is 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/
 *
 * 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.example.migrationhub;

// snippet-start:[migration.java2.describe_app_state.import]
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.migrationhub.MigrationHubClient;
import software.amazon.awssdk.services.migrationhub.model.DescribeApplicationStateRequest;
import software.amazon.awssdk.services.migrationhub.model.DescribeApplicationStateResponse;
import software.amazon.awssdk.services.migrationhub.model.MigrationHubException;
// snippet-end:[migration.java2.describe_app_state.import]

public class DescribeAppState {

    public static void main(String[] args) {


        final String USAGE = "\n" +
                "To run this example, supply the application id value\n" +
                "\n" +
                "Ex: DescribeAppState appId\n";

        if (args.length < 1) {
            System.out.println(USAGE);
            System.exit(1);
        }

        String appId = args[0];

        Region region = Region.US_WEST_2;
        MigrationHubClient migrationClient = MigrationHubClient.builder()
                .region(region)
                .build();

        describeApplicationState(migrationClient, appId);
    }

    // snippet-start:[migration.java2.describe_app_state.main]
    public static void describeApplicationState (MigrationHubClient migrationClient, String appId) {

        try {

            DescribeApplicationStateRequest applicationStateRequest = DescribeApplicationStateRequest.builder()
                    .applicationId(appId)
                    .build();

            DescribeApplicationStateResponse applicationStateResponse = migrationClient.describeApplicationState(applicationStateRequest);

            // Display the results
            System.out.println("The application status is " +applicationStateResponse.applicationStatusAsString() );

        } catch(MigrationHubException e) {
            System.out.println(e.getMessage());
            System.exit(1);
        }
        // snippet-end:[migration.java2.describe_app_state.main]

    }
}

Create DescribeAppState.java