[Pull credentials from AWS parameter store] #AWS

AppConfigParam.java

package com.morningstar.uim.util;

import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
import com.amazonaws.services.simplesystemsmanagement.AWSSimpleSystemsManagement;
import com.amazonaws.services.simplesystemsmanagement.AWSSimpleSystemsManagementClient;
import com.amazonaws.services.simplesystemsmanagement.AWSSimpleSystemsManagementClientBuilder;
import com.amazonaws.services.simplesystemsmanagement.model.GetParameterRequest;
import com.amazonaws.services.simplesystemsmanagement.model.GetParameterResult;
import java.util.concurrent.ConcurrentHashMap;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;

@Configuration
public class AppConfigParam {
    private final Environment env;
    private static final ConcurrentHashMap<String, String> map = new ConcurrentHashMap();

    public AppConfigParam(final Environment env) {
        this.env = env;
    }

    public String get(String paramName) {
        paramName = "appConfigParam." + paramName;
        String value = (String)map.get(paramName);
        if (value == null) {
            String lookupKeys = this.env.getProperty(paramName);
            if (lookupKeys != null) {
                String[] lookupKeyValues = lookupKeys.split("\\|");
                value = System.getenv(lookupKeyValues[0].trim());
                if (value != null) {
                    map.put(paramName, value);
                } else {
                    AWSSimpleSystemsManagement ssm = (AWSSimpleSystemsManagement)((AWSSimpleSystemsManagementClientBuilder)AWSSimpleSystemsManagementClient.builder().withCredentials(DefaultAWSCredentialsProviderChain.getInstance())).build();
                    GetParameterRequest request = (new GetParameterRequest()).withName(lookupKeyValues[1].trim()).withWithDecryption(true);
                    GetParameterResult response = ssm.getParameter(request);
                    if (response != null && response.getParameter() != null && response.getParameter().getValue() != null) {
                        value = response.getParameter().getValue();
                        map.put(paramName, value);
                    }
                }
            }
        }

        return value;
    }

    @Bean
    public AppConfigParam getAppConfigParam() {
        return this;
    }
}


// To use it, put the following in properties file
// appConfigParam.tokenizer-apiKey = TOKENIZER_API_KEY|tokenizerApikey_qa
// And need to login via AWS CLI before running