spring data mongodb converter - mongodb

Question

I am using spring data mongo-db 1.4.1.RELEASE.
My entity 'Event' has a getter method which is calculated based on other properties:
public int getStatus() {
return (getMainEventId() == null) ? (elapseTimeInMin() < MINIMUM_TIME ? CANDIDATE :
VALID) : POINTER;
}
I wanted the property 'status' to be persisted only through the getter ,so I wrote converters:
#WritingConverter
public class EventWriteConverter implements Converter<Event ,BasicDBObject > {
static final Logger logger = LoggerFactory.getLogger(EventWriteConverter.class.getCanonicalName());
public BasicDBObject convert(Event event) {
logger.info("converting " +event );
if (event.getMainEventId() != null)
return new BasicDBObject("mainEventId", event.getMainEventId() );
BasicDBObject doc = new BasicDBObject("status",event.getStatus()).
append("updated_date",new Date()).
append("start",event.getS0()).
append("end",event.getS1()).
append("location",event.getLocation()).
;
BasicDBList list = new BasicDBList();
doc.append("access_points",event.getHotPoints());
return doc;
}
#ReadingConverter
public class EventReadConverter implements Converter<BasicDBObject, Event> {
#Inject
HotPointRepositry hotRepositry;
static final Logger logger = LoggerFactory.getLogger(EventReadConverter.class.getCanonicalName());
public Event convert(BasicDBObject doc) {
logger.info(" converting ");
Event event = new Event();
event.setId(doc.getObjectId("_id"));
event.setS0(doc.getDate("start"));
event.setS1(doc.getDate("end"));
BasicDBList dblist = (BasicDBList) doc.get("hot_points");
if (dblist != null) {
for (Object obj : dblist) {
ObjectId hotspotId = ((BasicDBObject) obj).getObjectId("_id");
event.addHot(hotRepositry.findOne(hotId));
}
}
dblist = (BasicDBList) doc.get("devices");
if (dblist != null) {
for (Object obj : dblist)
event.addDevice(obj.toString());
}
event.setMainEventId(doc.getObjectId("mainEventId"));
return event;
}
}
My test mongo configuration is
#Profile("test")
#Configuration
#EnableMongoRepositories(basePackages = "com.echo.spring.data.mongo")
#ComponentScan(basePackages = "com.echo.spring.data.mongo" )
public class MongoDbTestConfig extends AbstractMongoConfiguration {
static final Logger logger = LoggerFactory.getLogger(MongoDbTestConfig.class.getCanonicalName());
#Override
protected String getDatabaseName() {
return "echo";
}
#Override
public Mongo mongo() {
return new Fongo("echo-test").getMongo();
}
#Override
protected String getMappingBasePackage() {
return "com.echo.spring.data.mongo";
}
#Bean
#Override
public CustomConversions customConversions() {
logger.info("loading custom converters");
List<Converter<?, ?>> converterList = new ArrayList<Converter<?, ?>>();
converterList.add(new EventReadConverter());
converterList.add(new EventWriteConverter());
CustomConversions cus = new CustomConversions(converterList);
return new CustomConversions(converterList);
}
}
And my test (using fongo) is
ActiveProfiles("test")
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(classes = MongoDbTestConfig.class )
public class SampleMongoApplicationTests {
#Test
#ShouldMatchDataSet(location = "/MongoJsonData/events.json")
public void shouldSaveEvent() throws IOException {
URL url = Resources.getResource("MongoJsonData/events.json");
List<String> lines = Resources.readLines(url,Charsets.UTF_8);
for (String line : lines) {
Event event = objectMapper.readValue(line.getBytes(),Event.class);
eventRepository.save(event);
}
}
I can see the converters are loaded when the configuration customConversions() is called
I added logging and breakpoints in the convert methods but they do not seems to be
called when I run or debug, though they are loaded .
What am I doing wrong ?

Answer 1

I had a similar situation, I followed Spring -Mongodb storing/retrieving enums as int not string
and I need both the converter AND converterFactory wired to get it working.