KeyGeneratorServiceImpl.java

package no.niths.services.auth;

import java.util.GregorianCalendar;

import no.niths.services.auth.interfaces.KeyGeneratorService;
import no.niths.services.development.interfaces.ApplicationService;
import no.niths.services.development.interfaces.DeveloperService;

import org.apache.commons.lang.RandomStringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * 
 * Service for generating and developer and application keys
 * 
 */
@Service
public class KeyGeneratorServiceImpl implements KeyGeneratorService {

    private static final Logger logger = LoggerFactory
            .getLogger(KeyGeneratorServiceImpl.class);
    
    private final static int DEVELOPER = 0;
    private final static int APPLICATION = 1;

    @Autowired
    private DeveloperService developerService;
    
    @Autowired
    private ApplicationService applicationService;

    /**
     * {@inheritDoc}
     */
    @Override
    public String generateDeveloperKey() {
        logger.debug("Generating developer key");
        return generateKey(DEVELOPER);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String generateApplicationKey() {
        logger.debug("Generating application key");
        return generateKey(APPLICATION);
    }
    
    /**
     * Generates a random key with ten alpha numeric digits
     * Checks the DB to verify that the key is unique
     * 
     * @param domain app or dev
     * @return key as a string
     */
    private String generateKey(int domain){
        boolean found = false;
        String key = "";
        while(!found){
            key = RandomStringUtils.randomAlphanumeric(5) + "-" + new GregorianCalendar().getTimeInMillis();
            switch (domain) {
            case DEVELOPER:
                if(developerService.getDeveloperByDeveloperKey(key) == null){
                    found = true;
                }                
                break;
            case APPLICATION:
                if(applicationService.getByApplicationKey(key, false) == null){
                    found = true;
                }
                break;
            }
        }
        return key;
    }
}