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package dk.thoerup.traininfoservice; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.Comparator; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.logging.Level; |
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import java.util.logging.Logger; |
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import javax.jdo.Extent; |
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import javax.jdo.PersistenceManager; |
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import javax.jdo.Query; |
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import net.sf.jsr107cache.Cache; |
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import net.sf.jsr107cache.CacheException; |
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import net.sf.jsr107cache.CacheManager; |
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import com.google.appengine.api.memcache.jsr107cache.GCacheFactory; |
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import dk.thoerup.android.traininfo.common.StationBean; |
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import dk.thoerup.android.traininfo.common.StationBean.StationEntry; |
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import dk.thoerup.traininfoservice.geo.Geo; |
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import dk.thoerup.traininfoservice.jdo.JdoStationBean; |
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import dk.thoerup.traininfoservice.jdo.PMF; |
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public class StationDAO { |
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final static int LOCATION_LIMIT = 8; |
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static final Logger logger = Logger.getLogger(StationDAO.class.getName()); |
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final int TIMEOUT_SECONDS = 10*60; |
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Cache cache; |
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public StationDAO() { |
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Map props = new HashMap(); |
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props.put(GCacheFactory.EXPIRATION_DELTA, TIMEOUT_SECONDS); |
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|
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try { |
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cache = CacheManager.getInstance().getCacheFactory().createCache(props); |
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} catch (CacheException e) { |
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logger.log(Level.WARNING, "error creating cache", e); |
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} |
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} |
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public StationEntry getById(int id) { |
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PersistenceManager pm = null; |
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try { |
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pm = PMF.get().getPersistenceManager(); |
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JdoStationBean bean =pm.getObjectById(JdoStationBean.class, new Integer(id) ); |
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return bean.toStationEntry(); |
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} finally { |
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pm.close(); |
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} |
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} |
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|
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/* damn that JDO sucks so we to the filtering in java-code */ |
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public StationBean getByName(String searchname) { |
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PersistenceManager pm = null; |
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try { |
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/*pm = PMF.get().getPersistenceManager(); |
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Query q = pm.newQuery(JdoStationBean.class); |
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q.setOrdering("name"); |
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List<JdoStationBean> beanList = (List<JdoStationBean>) q.execute();*/ |
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List<JdoStationBean> beanList = getAllStations(); |
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StationBean stationBean = new StationBean(); |
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searchname = searchname.toLowerCase(); |
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for(JdoStationBean bean : beanList) { |
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if (bean.getName().toLowerCase().startsWith(searchname)) { |
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stationBean.entries.add( bean.toStationEntry() ); |
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} else { |
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for (String alias : bean.aliases ) { |
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if (alias.toLowerCase().startsWith(searchname)) { |
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stationBean.entries.add( bean.toStationEntry() ); |
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} |
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} |
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} |
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} |
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return stationBean; |
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} finally { |
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// pm.close(); |
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} |
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} |
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public List<JdoStationBean> getAllStations() { |
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final String key = "allstations"; |
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List<JdoStationBean> result = (List<JdoStationBean>) cache.get(key); |
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if (result == null) { |
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logger.info("getAllStations Cache miss"); |
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PersistenceManager pm = null; |
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final double LAT = 0.4; |
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final double LNG = 0.75; |
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try { |
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pm = PMF.get().getPersistenceManager(); |
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Extent<JdoStationBean> all = pm.getExtent(JdoStationBean.class, false); |
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result = new ArrayList<JdoStationBean>(); |
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for (JdoStationBean station : all) { |
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result.add(station); |
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} |
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cache.put(key, result); |
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} finally { |
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pm.close(); |
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} |
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} else { |
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logger.info("getAllStations Cache hit"); |
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} |
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return result; |
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} |
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//String limitExpression = (geolimit == true) ? "AND abs(latitude-?)<0.4 AND abs(longitude-?)<0.75 " : ""; |
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/* |
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public List<JdoStationBean> getByLocationList(double latitude, double longitude, boolean geolimit) { |
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PersistenceManager pm = null; |
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final double LAT = 0.4; |
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final double LNG = 0.75; |
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try { |
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pm = PMF.get().getPersistenceManager(); |
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Query q = pm.newQuery(JdoStationBean.class); |
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if (geolimit == true) { |
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double minLat = latitude - LAT; |
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double maxLat = latitude + LAT; |
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//DAMN JDO implementation only allows us to compare on one parameter |
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String filter = String.format("latitude > %f && latitude < %f", minLat, maxLat); |
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q.setFilter( filter ); |
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} |
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List<JdoStationBean> beanList = (List<JdoStationBean>) q.execute(); |
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logger.info("beanList size " + beanList.size()); |
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return beanList; |
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} finally { |
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pm.close(); |
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} |
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}*/ |
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public StationBean getByLocation(double latitude, double longitude) { |
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/* |
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List<JdoStationBean> beanList = getByLocationList(latitude,longitude,true); |
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if (beanList.size() < LOCATION_LIMIT ) { |
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logger.info("getByLocation failover: " +latitude + "," + longitude); |
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beanList = getByLocationList(latitude,longitude, false); |
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}*/ |
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List<JdoStationBean> beanList = getAllStations(); |
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StationBean stationBean = new StationBean(); |
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Geo location = new Geo(latitude,longitude); |
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for(JdoStationBean bean : beanList) { |
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double meter = Geo.distanceKM( location, new Geo(bean.getLatitude(), bean.getLongitude() )) * 1000.0; |
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bean.distance = (int) meter; |
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} |
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Collections.sort(beanList, new Comparator<JdoStationBean>() { |
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@Override |
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public int compare(JdoStationBean o1, JdoStationBean o2) { |
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if (o1.distance < o2.distance) { |
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return -1; |
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} else if (o1.distance > o2.distance) { |
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return 1; |
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} else { |
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return 0; |
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} |
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} |
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}); |
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for (int i=0; i<LOCATION_LIMIT && i<beanList.size(); i++) { |
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stationBean.entries.add( beanList.get(i).toStationEntry() ); |
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} |
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return stationBean; |
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} |
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public StationBean getByList(String list) { |
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PersistenceManager pm = null; |
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try { |
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String parts[] = list.split(","); |
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StringBuilder filter = new StringBuilder(); |
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for(String part : parts) { |
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if (filter.length() > 0) { |
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filter.append( " || " ); |
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} |
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filter.append("id == ").append(part); |
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} |
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//String filter = "id == 10 || id == 82"; //TODO: build filter |
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pm = PMF.get().getPersistenceManager(); |
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Query q = pm.newQuery(JdoStationBean.class); |
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q.setFilter( filter.toString() ); |
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q.setOrdering("name"); |
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List<JdoStationBean> beanList = (List<JdoStationBean>) q.execute(); |
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StationBean stationBean = new StationBean(); |
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for(JdoStationBean bean : beanList) { |
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stationBean.entries.add( bean.toStationEntry() ); |
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} |
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return stationBean; |
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} finally { |
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pm.close(); |
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} |
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|
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} |
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public int getIdByName(String name) { |
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List<JdoStationBean> beanList = null; |
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PersistenceManager pm = null; |
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try { |
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String filter = " name == '" + name + "'"; |
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pm = PMF.get().getPersistenceManager(); |
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Query q = pm.newQuery(JdoStationBean.class); |
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q.setFilter(filter); |
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beanList = (List<JdoStationBean>) q.execute(); |
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StationBean stationBean = new StationBean(); |
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for(JdoStationBean bean : beanList) { |
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stationBean.entries.add( bean.toStationEntry() ); |
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} |
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|
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} finally { |
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pm.close(); |
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} |
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if ( beanList != null && beanList.size() == 1) { |
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return (int) beanList.get(0).getId(); |
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} else { |
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return -1; |
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} |
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} |
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|
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@SuppressWarnings("unchecked") |
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public int saveStations(StationBean stationBean) throws IOException { |
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PersistenceManager pm = null; |
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try { |
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pm = PMF.get().getPersistenceManager(); |
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List oldEntries = (List) pm.newQuery(JdoStationBean.class).execute(); |
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pm.deletePersistentAll(oldEntries); |
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List<JdoStationBean> jdoList = new ArrayList<JdoStationBean>(); |
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for (StationEntry station : stationBean.entries) { |
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JdoStationBean jdoBean = JdoStationBean.fromStationEntry(station); |
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jdoList.add(jdoBean); |
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} |
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pm.makePersistentAll(jdoList); |
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return jdoList.size(); |
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} finally { |
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pm.close(); |
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} |
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} |
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|
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} |