Examples of com.mongodb.DBCollection.findOne()

com.mongodb.DBCollection.findOne()
Finds an object by its id. This compares the passed in value to the _id field of the document @param obj any valid object @return the object, if found, otherwise null @throws MongoException

        Object o = exchange.getIn().getMandatoryBody();
        DBObject ret;


        DBObject fieldFilter = exchange.getIn().getHeader(MongoDbConstants.FIELDS_FILTER, DBObject.class);
        if (fieldFilter == null) {
            ret = dbCol.findOne(o);
        } else {
            ret = dbCol.findOne(o, fieldFilter);
        }


        Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.save);

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        DBObject fieldFilter = exchange.getIn().getHeader(MongoDbConstants.FIELDS_FILTER, DBObject.class);
        if (fieldFilter == null) {
            ret = dbCol.findOne(o);
        } else {
            ret = dbCol.findOne(o, fieldFilter);
        }


        Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.save);
        resultMessage.setBody(ret);
        resultMessage.setHeader(MongoDbConstants.RESULT_TOTAL_SIZE, ret == null ? 0 : 1);

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        DBObject o = exchange.getIn().getMandatoryBody(DBObject.class);
        DBObject ret;


        DBObject fieldFilter = exchange.getIn().getHeader(MongoDbConstants.FIELDS_FILTER, DBObject.class);
        if (fieldFilter == null) {
            ret = dbCol.findOne(o);
        } else {
            ret = dbCol.findOne(o, fieldFilter);
        }


        Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.findOneByQuery);

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        DBObject fieldFilter = exchange.getIn().getHeader(MongoDbConstants.FIELDS_FILTER, DBObject.class);
        if (fieldFilter == null) {
            ret = dbCol.findOne(o);
        } else {
            ret = dbCol.findOne(o, fieldFilter);
        }


        Message resultMessage = prepareResponseMessage(exchange, MongoDbOperation.findOneByQuery);
        resultMessage.setBody(ret);
        resultMessage.setHeader(MongoDbConstants.RESULT_TOTAL_SIZE, ret == null ? 0 : 1);

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        mock.reset();
        // ensure that the persisted lastVal is startTimestamp + 300min
        Calendar cal300 = (Calendar) startTimestamp.clone();
        cal300.add(Calendar.MINUTE, 300);
        context.stopRoute("tailableCursorConsumer2");
        assertEquals(cal300.getTime(), trackingCol.findOne(new BasicDBObject("persistentId", "darwin")).get(MongoDbTailTrackingConfig.DEFAULT_FIELD));
        context.startRoute("tailableCursorConsumer2");
        
        // expect 300 messages and not 600
        mock.expectedMessageCount(300);
        // pump 300 records

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        assertEquals(cal301.getTime(), ((DBObject) firstBody).get("increasing"));
        // check that the persisted lastVal after stopping the route is startTimestamp + 600min
        context.stopRoute("tailableCursorConsumer2");
        Calendar cal600 = (Calendar) startTimestamp.clone();
        cal600.add(Calendar.MINUTE, 600);
        assertEquals(cal600.getTime(), trackingCol.findOne(new BasicDBObject("persistentId", "darwin")).get(MongoDbTailTrackingConfig.DEFAULT_FIELD));
    }
    
    @Test
    public void testCustomTailTrackLocation() throws Exception {
        assertEquals(0, cappedTestCollection.count());

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        mock.reset();
        
        // stop the route to ensure that our lastVal is persisted, and check it
        context.stopRoute("tailableCursorConsumer3");
        // ensure that the persisted lastVal is 300, newton is the name of the trackingField we are using
        assertEquals(300, trackingCol.findOne(new BasicDBObject("persistentId", "darwin")).get("newton"));
        context.startRoute("tailableCursorConsumer3");
        
        // expect 300 messages and not 600
        mock.expectedMessageCount(300);
        // pump 300 records

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        Object firstBody = mock.getExchanges().get(0).getIn().getBody();
        assertTrue(firstBody instanceof DBObject);
        assertEquals(301, ((DBObject) firstBody).get("increasing"));
        // check that the persisted lastVal after stopping the route is 600, newton is the name of the trackingField we are using
        context.stopRoute("tailableCursorConsumer3");
        assertEquals(600, trackingCol.findOne(new BasicDBObject("persistentId", "darwin")).get("newton"));


    }
    
    public void assertAndResetMockEndpoint(MockEndpoint mock) throws Exception {
        mock.assertIsSatisfied();

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        assertEquals("Response isn't of type WriteResult", WriteResult.class, result.getClass());
        
        DBCollection dynamicCollection = mongo.getDB("otherDB").getCollection(testCollection.getName());
        
        DBObject b = dynamicCollection.findOne("testInsertDynamicityEnabledDBOnly");
        assertNotNull("No record with 'testInsertDynamicityEnabledDBOnly' _id", b);
        
        b = testCollection.findOne("testInsertDynamicityEnabledDBOnly");
        assertNull("There is a record with 'testInsertDynamicityEnabledDBOnly' _id in the test collection", b);

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        assertEquals("Response isn't of type WriteResult", WriteResult.class, result.getClass());
        
        DBCollection dynamicCollection = db.getCollection("otherCollection");
        
        DBObject b = dynamicCollection.findOne("testInsertDynamicityEnabledCollectionOnly");
        assertNotNull("No record with 'testInsertDynamicityEnabledCollectionOnly' _id", b);
        
        b = testCollection.findOne("testInsertDynamicityEnabledDBOnly");
        assertNull("There is a record with 'testInsertDynamicityEnabledCollectionOnly' _id in the test collection", b);

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