Java 类com.mongodb.DBCollection 实例源码

/**
 * update 6: {@link UserDocument} has changed; 'name' and 'surname' will be concat to 'name'.
 * for each every user document get 'name' and 'surname', concat them, update 'name', remove field surname and update document.
 *
 * @since V7
 */
@ChangeSet(order = "008", id = "updateUserChangeNameAndSurnameToName", author = "admin")
public void updateUserChangeNameAndSurnametoName(final MongoTemplate template) {
  final DBCollection userCollection = template.getCollection("user");

  final Iterator<DBObject> cursor = userCollection.find();
  while (cursor.hasNext()) {
    final DBObject current = cursor.next();

    final Object nameObj = current.get("name");
    final Object surnameObj = current.get("surname");
    final String updateName = (nameObj != null ? nameObj.toString() : "") + " " + (surnameObj != null ? surnameObj.toString() : "");

    final BasicDBObject updateQuery = new BasicDBObject();
    updateQuery.append("$set", new BasicDBObject("name", updateName));
    updateQuery.append("$unset", new BasicDBObject("surname", ""));

    final BasicDBObject searchQuery = new BasicDBObject();
    searchQuery.put("_id", current.get("_id"));

    userCollection.update(searchQuery, updateQuery);
  }
}

public int getNextId(GridFS destDatabase) {
    DBCollection countersCollection = destDatabase.getDB().getCollection("counters");

    DBObject record = countersCollection.findOne(new BasicDBObject("_id", "package"));
    if (record == null) {
        BasicDBObject dbObject = new BasicDBObject("_id", "package");
        dbObject.append("seq", 0);
        countersCollection.insert(dbObject);
        record = dbObject;
    }
    int oldID = (int) record.get("seq");
    int newID = oldID + 1;
    record.put("seq", newID);
    countersCollection.update(new BasicDBObject("_id", "package"), record);

    return newID;
}

public DBObject selectOne(DBCollection collection) {
    DBObject fields = getFields();
    DBObject query = getQuery();
    DBObject orderByObject = getOrderByObject();

    // 日志
    log(fields, query, orderByObject);

    if (null == fields && null == orderByObject) {
        return collection.findOne(query);
    } else if (null != fields && null == orderByObject) {
        return collection.findOne(query, fields);
    } else {
        return collection.findOne(query, fields, orderByObject);
    }
}

/**
 * Init registry.
 **/
@PostConstruct
public void initialize() {
    Assert.notNull(this.mongoTemplate);

    LOGGER.debug("Setting up MongoDb Ticket Registry instance [{}]", this.collectionName);
    if (this.dropCollection) {
        LOGGER.debug("Dropping database collection: [{}]", this.collectionName);
        this.mongoTemplate.dropCollection(this.collectionName);
    }

    if (!this.mongoTemplate.collectionExists(this.collectionName)) {
        LOGGER.debug("Creating database collection: [{}]", this.collectionName);
        this.mongoTemplate.createCollection(this.collectionName);
    }
    LOGGER.debug("Creating indices on collection [{}] to auto-expire documents...", this.collectionName);
    final DBCollection collection = mongoTemplate.getCollection(this.collectionName);
    collection.createIndex(new BasicDBObject(TicketHolder.FIELD_NAME_EXPIRE_AT, 1),
            new BasicDBObject("expireAfterSeconds", 0));

    LOGGER.info("Configured MongoDb Ticket Registry instance [{}]", this.collectionName);
}

private int doBatchUpdate(DBCollection dbCollection, String collName, Collection<BatchUpdateOptions> options,
        boolean ordered) {
    DBObject command = new BasicDBObject();
    command.put("update", collName);
    List<BasicDBObject> updateList = new ArrayList<BasicDBObject>();
    for (BatchUpdateOptions option : options) {
        BasicDBObject update = new BasicDBObject();
        update.put("q", option.getQuery().getQueryObject());
        update.put("u", option.getUpdate().getUpdateObject());
        update.put("upsert", option.isUpsert());
        update.put("multi", option.isMulti());
        updateList.add(update);
    }
    command.put("updates", updateList);
    command.put("ordered", ordered);
    CommandResult commandResult = dbCollection.getDB().command(command);
    return Integer.parseInt(commandResult.get("n").toString());
}

private int InsertData(SQLInsertStatement state) {
    if (state.getValues().getValues().size() ==0 ){
        throw new RuntimeException("number of  columns error");
    }       
    if (state.getValues().getValues().size() != state.getColumns().size()){
        throw new RuntimeException("number of values and columns have to match");
    }
    SQLTableSource table=state.getTableSource();
    BasicDBObject o = new BasicDBObject();
    int i=0;
    for(SQLExpr col : state.getColumns()) {
        o.put(getFieldName2(col), getExpValue(state.getValues().getValues().get(i)));
        i++;
    }       
    DBCollection coll =this._db.getCollection(table.toString());
    coll.insert(new DBObject[] { o });
    return 1;
}

private int UpData(SQLUpdateStatement state) {
    SQLTableSource table=state.getTableSource();
    DBCollection coll =this._db.getCollection(table.toString());

    SQLExpr expr=state.getWhere();
    DBObject query = parserWhere(expr);

    BasicDBObject set = new BasicDBObject();
    for(SQLUpdateSetItem col : state.getItems()){
        set.put(getFieldName2(col.getColumn()), getExpValue(col.getValue()));   
    }
    DBObject mod = new BasicDBObject("$set", set);
    coll.updateMulti(query, mod);
    //System.out.println("changs count:"+coll.getStats().size());
    return 1;       
}

/** Read the occasions that are stored in the database and schedule them to run. */
@PostConstruct
public void afterCreate() {
  String method = "afterCreate";
  logger.entering(clazz, method);

  orchestrator.setOccasionResource(this);

  DBCollection occasions = getCollection();
  DBCursor cursor = occasions.find();
  while (cursor.hasNext()) {
    DBObject dbOccasion = cursor.next();
    Occasion occasion = new Occasion(dbOccasion);
    try {
      // TODO: There was a comment here about how we should mark the event as
      //       popped in the database, which will have different meaning for
      //       one-time or interval occasions.  Need to re-visit this.
      orchestrator.scheduleOccasion(occasion);
    } catch (Throwable t) {
      logger.log(Level.WARNING, "Could not schedule occasion at startup", t);
    }
  }

  logger.exiting(clazz, method);
}

public void testFindOne() throws UnknownHostException {
    MarcMongodbClient client = new MarcMongodbClient("localhost" , 27017, "sub_last_print");
    DBCollection collection = client.getCollection("marc");
    BasicDBObject doc = createTestObject();
    collection.insert(doc);
    assertEquals(1, collection.count());
    DBObject myDoc = collection.findOne();
    assertEquals("MongoDB", myDoc.get("name"));
    assertEquals("database", myDoc.get("type"));
    assertEquals(1, myDoc.get("count"));
    assertEquals(BasicDBObject.class, myDoc.get("info").getClass());
    assertEquals(new BasicDBObject("x", 203).append("y", 102), myDoc.get("info"));
    assertEquals(203, ((BasicDBObject)myDoc.get("info")).get("x"));
    assertEquals(Integer.class, ((BasicDBObject)myDoc.get("info")).get("x").getClass());
    System.out.println(myDoc);
    collection.remove(new BasicDBObject("name", "MongoDB"));
}

public synchronized void testImport() throws URISyntaxException, IOException, InterruptedException {
    MarcMongodbClient client = new MarcMongodbClient("localhost" , 27017, "sub_last_print");
    DBCollection collection = client.getCollection("marc");
    assertEquals(0, collection.count());
    boolean insert = true;
    if (insert) {
        JsonPathCache<? extends XmlFieldInstance> cache;
        List<String> records = FileUtils.readLines("general/marc.json");
        for (String record : records) {
            cache = new JsonPathCache<>(record);
            Object jsonObject = jsonProvider.parse(record);
            String id   = cache.get("$.controlfield.[?(@.tag == '001')].content").get(0).getValue();
            String x003 = cache.get("$.controlfield.[?(@.tag == '003')].content").get(0).getValue();

            BasicDBObject doc = new BasicDBObject("type", "marcjson")
                .append("id", id)
                .append("x003", x003)
                .append("record", record);
            collection.insert(doc);
        }
        assertEquals(674, collection.count());
    }
    collection.remove(new BasicDBObject("type", "marcjson"));
    assertEquals(0, collection.count());
}

public Object selectVar(String dsKey, String sql) {
    SelectVo selectVo = (SelectVo) sqlParser.parse(sql);
    DBCollection collection = MongoSupport.getCollection(dsKey, selectVo.getTable());
    // return selectVo.selectVar(collection); fix bug
    Object result = selectVo.selectVar(collection);
    if (null == result) {
        return result;
    }
    if (result instanceof DBObject) {
        // return getXCOResults((DBObject) result, null);
        XCO one = getXCOResults((DBObject) result, null);
        return selectVo.selectVarOneField(one);
    } else {
        return result;
    }
}

public Object insert(DBCollection collection, WriteConcern writeConcern) {
    DBObject document = new BasicDBObject();
    // 匹配_id
    for (int i = 0, n = columns.size(); i < n; i++) {
        // document.put(columns.get(i), values.get(i).getValue());

        String tempColumn = columns.get(i);
        if (3 == tempColumn.length() && tempColumn.equals("_id")) {
            document.put(tempColumn, new ObjectId(values.get(i).getValue().toString()));
        } else {
            document.put(tempColumn, values.get(i).getValue());
        }
    }
    log(document);
    // TODO: WriteConcern.ACKNOWLEDGED需要可以配置
    // WriteResult result = collection.insert(document, WriteConcern.ACKNOWLEDGED);
    // collection.insert(document, MongoComponent.getInstance().getDefaultWriteConcern());
    collection.insert(document, writeConcern);
    Object oid = document.get("_id");
    if (null != oid) {
        return oid.toString();
    }
    return null;
}

@Test
public void updatePojoTest() {

    Bson update = combine(set("user", "Jim"),
            set("action", Action.DELETE),
            // unfortunately at this point we need to provide a non generic class, so the codec is able to determine all types
            // remember: type erasure makes it impossible to retrieve type argument values at runtime
            // @todo provide a mechanism to generate non-generic class on the fly. Is that even possible ?
            // set("listOfPolymorphicTypes", buildNonGenericClassOnTheFly(Arrays.asList(new A(123), new B(456f)), List.class, Type.class),
            set("listOfPolymorphicTypes", new PolymorphicTypeList(Arrays.asList(new A(123), new B(456f)))),
            currentDate("creationDate"),
            currentTimestamp("_id"));

    FindOneAndUpdateOptions findOptions = new FindOneAndUpdateOptions();
    findOptions.upsert(true);
    findOptions.returnDocument(ReturnDocument.AFTER);

    MongoCollection<Pojo> pojoMongoCollection = mongoClient.getDatabase("test").getCollection("documents").withDocumentClass(Pojo.class);

    Pojo pojo = pojoMongoCollection.findOneAndUpdate(Filters.and(Filters.lt(DBCollection.ID_FIELD_NAME, 0),
            Filters.gt(DBCollection.ID_FIELD_NAME, 0)), update, findOptions);

    assertNotNull(pojo.id);
}

public DB createDatabase(String databaseName) throws MongoServiceException {
        try {
            DB db = client.getDB(databaseName);

            // save into a collection to force DB creation.
            DBCollection col = db.createCollection("foo", null);
            BasicDBObject obj = new BasicDBObject();
            obj.put("foo", "bar");
            col.insert(obj);
            // drop the collection so the db is empty
//          col.drop();

            return db; 
        } catch (MongoException e) {
            // try to clean up and fail
            try {
                deleteDatabase(databaseName);
            } catch (MongoServiceException ignore) {}
            throw handleException(e);
        }
    }

private void reportGauge(final String name, final Gauge gauge, final Date timestamp) {
    final DBCollection coll = db.getCollection("metric_gauge");
    final Object value = gauge.getValue();

    if (value == null) {
        // skip report
        return;
    }

    if (!String.class.equals(value.getClass())) {
        final GaugeEntity entity = new GaugeEntity();
        entity.setName(prefix(name));
        entity.setTimestamp(timestamp);
        entity.setValue(value);

        try {
            coll.save(entity.toDBObject());
        } catch (MongoException e) {
            LOGGER.warn("Unable to report gauge {}", name, e);
        }
    }
}

public CacheEntry getCacheEntry(String key, CacheEntry defaultValue) {
    DBCursor cur = null;
    DBCollection coll = getCollection();
    BasicDBObject query = new BasicDBObject("key", key.toLowerCase());

    // be sure to flush
    flushInvalid(coll,query);

    cur = coll.find(query);

    if (cur.count() > 0) {
        hits++;
        MongoDBCacheDocument doc = new MongoDBCacheDocument((BasicDBObject) cur.next());
        doc.addHit();
        //update the statistic and persist
        save(doc,0);
        return new MongoDBCacheEntry(doc);
    }
    misses++;
    return defaultValue;
}

/**
 * Perform a single 'update' operation on the local object store.
 *
 * @param ref  Object reference string of the object to be written.
 * @param version  Expected version number of object before updating.
 * @param obj  JSON string encoding the object to be written.
 * @param collection  Collection to put to.
 *
 * @return an UpdateResultDesc object describing the success or failure of
 *    the operation.
 */
private UpdateResultDesc doUpdate(String ref, int version, String obj,
                                  DBCollection collection)
{
    String failure = null;
    boolean atomicFailure = false;
    if (obj == null) {
        failure = "no object data given";
    } else {
        try {
            DBObject objectToWrite = jsonLiteralToDBObject(obj, ref);
            DBObject query = new BasicDBObject();
            query.put("ref", ref);
            query.put("version", version);
            WriteResult result =
                collection.update(query, objectToWrite, false, false);
            if (result.getN() != 1) {
                failure = "stale version number on update";
                atomicFailure = true;
            }
        } catch (Exception e) {
            failure = e.getMessage();
        }
    }
    return new UpdateResultDesc(ref, failure, atomicFailure);
}

/**
 * Perform a single 'query' operation on the local object store.
 *
 * @param template  Query template indicating what objects are sought.
 * @param collection  Collection to query.
 * @param maxResults  Maximum number of result objects to return, or 0 to
 *    indicate no fixed limit.
 *
 * @return a list of ObjectDesc objects for objects matching the query.
 */
private List<ObjectDesc> doQuery(JSONObject template,
                                 DBCollection collection, int maxResults) {
    List<ObjectDesc> results = new LinkedList<ObjectDesc>();

    try {
        DBObject query = jsonObjectToDBObject(template);
        DBCursor cursor;
        if (maxResults > 0) {
            cursor = collection.find(query, null, 0, -maxResults);
        } else {
            cursor = collection.find(query);
        }
        for (DBObject dbObj : cursor) {
            JSONObject jsonObj = dbObjectToJSONObject(dbObj);
            String obj = jsonObj.sendableString();
            results.add(new ObjectDesc("query", obj, null));
        }
    } catch (Exception e) {
        results.add(new ObjectDesc("query", null, e.getMessage()));
    }
    return results;
}

public void addRate(Rating rating) {
  DBCollection collection = MongoFactory.getDB().getCollection(collectionName);
  DBObject query = new BasicDBObject(FIELD_ID, new ObjectId(getId()));

  ratings.add(rating);

  // Update module's average
  double average = 0;
  for (Rating r : ratings) {
    average += r.getRate();
  }
  average = average / ratings.size();

  DBObject toSet = new BasicDBObject();
  toSet.put(FIELD_RATINGS, ratings.toDBObject());
  toSet.put(FIELD_AVERAGE_RATE, ((double) average));

  collection.update(query, new BasicDBObject("$set", toSet), true, false);
}

public void save() throws SinfonierException {
  DBCollection collection = MongoFactory.getDB().getCollection(collectionName);

  if (this.id == null) {
    Logger.info("Adding a new module version");
    DBObject dbObj = this.toDBObject();
    collection.save(dbObj);
    this.id = dbObj.get(FIELD_ID).toString();
  } else {
    Logger.info("Editing module version id:" + this.getId().toString());
    DBObject query = new BasicDBObject(FIELD_ID, new ObjectId(this.id));
    DBObject toSet = this.toDBObject();

    // Remove fields's unmodified
    toSet.removeField(FIELD_ID);
    toSet.removeField(FIELD_CREATED);
    toSet.removeField(FIELD_TOPOLOGIES_COUNT);
    toSet.removeField(FIELD_BUILD_STATUS);

    // Update field's update
    toSet.put(FIELD_UPDATED, new Date());

    collection.update(query, new BasicDBObject("$set", toSet), true, false);
  }
}

public MongoExecutingJobQueue(Config config) {
    super(config);
    // table name (Collection name) for single table
    setTableName(JobQueueUtils.EXECUTING_JOB_QUEUE);

    // create table
    DBCollection dbCollection = template.getCollection();
    List<DBObject> indexInfo = dbCollection.getIndexInfo();
    // create index if not exist
    if (CollectionUtils.sizeOf(indexInfo) <= 1) {
        template.ensureIndex("idx_jobId", "jobId", true, true);
        template.ensureIndex("idx_taskId_taskTrackerNodeGroup", "taskId, taskTrackerNodeGroup", true, true);
        template.ensureIndex("idx_taskTrackerIdentity", "taskTrackerIdentity");
        template.ensureIndex("idx_gmtCreated", "gmtCreated");
    }
}

public StringBuilder getMongoDBData() {
    DBCollection collection = MongoUtil.getCollection("some_db",
            "some_collection");

    DBCursor cursor = collection.find();
    StringBuilder data = new StringBuilder();

    long startTime = System.currentTimeMillis();
    while (cursor.hasNext()) {
        data.append(cursor.next());
    }
    long endTime = System.currentTimeMillis();

    System.out.println("Time taken : " + (endTime - startTime));

    return data;
}

@ChangeSet(order = "03", author = "initiator", id = "03-addSocialUserConnection")
public void addSocialUserConnection(DB db) {
    DBCollection socialUserConnectionCollection = db.getCollection("jhi_social_user_connection");
    socialUserConnectionCollection.createIndex(BasicDBObjectBuilder
            .start("user_id", 1)
            .add("provider_id", 1)
            .add("provider_user_id", 1)
            .get(),
        "user-prov-provusr-idx", true);
}

public static void main(String[] args) {
    // 新建一张表
    DBCollection db = addCollection(defauleDbName, "test", null);
    System.out.println(db != null);

    // 新增一条记录
    DBObject dbObject = new BasicDBObject();
    dbObject.put("name", "jack");
    save(defauleDbName, "test", dbObject);

    // 查询该记录
    DBObject query = new BasicDBObject();
    query.put("name", "jack");
    DBObject fields = new BasicDBObject();
    DBObject result = findOne(defauleDbName, "test", query, fields);

    System.out.println(result!=null?result.get("name"):"查询失败");

}

/**
 * Perform a single 'put' operation on the local object store.
 *
 * @param ref  Object reference string of the object to be written.
 * @param obj  JSON string encoding the object to be written.
 * @param collection  Collection to put to.
 *
 * @return a ResultDesc object describing the success or failure of the
 *    operation.
 */
private ResultDesc doPut(String ref, String obj, DBCollection collection,
                         boolean requireNew)
{
    String failure = null;
    if (obj == null) {
        failure = "no object data given";
    } else {
        try {
            DBObject objectToWrite = jsonLiteralToDBObject(obj, ref);
            if (requireNew) {
                WriteResult wr = collection.insert(objectToWrite);
            } else {
                DBObject query = new BasicDBObject();
                query.put("ref", ref);
                collection.update(query, objectToWrite, true, false);
            }
        } catch (Exception e) {
            failure = e.getMessage();
        }
    }
    return new ResultDesc(ref, failure);
}

@Override
public boolean createQueue(String taskTrackerNodeGroup) {
    String tableName = JobQueueUtils.getExecutableQueueName(taskTrackerNodeGroup);
    DBCollection dbCollection = template.getCollection(tableName);
    List<DBObject> indexInfo = dbCollection.getIndexInfo();
    // create index if not exist
    if (CollectionUtils.sizeOf(indexInfo) <= 1) {
        template.ensureIndex(tableName, "idx_jobId", "jobId", true, true);
        template.ensureIndex(tableName, "idx_taskId_taskTrackerNodeGroup", "taskId, taskTrackerNodeGroup", true, true);
        template.ensureIndex(tableName, "idx_taskTrackerIdentity", "taskTrackerIdentity");
        template.ensureIndex(tableName, "idx_triggerTime_priority_gmtCreated", "triggerTime,priority,gmtCreated");
        template.ensureIndex(tableName, "idx_isRunning", "isRunning");
        LOGGER.info("create queue " + tableName);
    }
    EXIST_TABLE.add(tableName);
    return true;
}

protected <T extends Model> DBCollection collection(Class<T> modelClass, boolean history) {
    String colName = getCollectionName(modelClass);

    if (history)
        colName = colName + "_history";

    if (colName == null) {
        Model m = app.model(modelClass);

        MethodHandle mh = Reflect.getMethodHandle(modelClass, "__name", true);

        try {
            colName = (String) mh.invokeExact(m);
        } catch (Throwable e) {
            e.printStackTrace();
        }
    }

    if (Str.isEmpty(colName))
        throw new IllegalStateException("The model class '" + modelClass.getName()
            + "' must specify the collection name in the @Model annotation or in the __name() method.");

    return db(modelClass).getCollection(colName);
}

@Override
public <T extends Model> Long snapshotCount(Class<T> modelClass, Map<String, Object> filter) {
    if (modelClass == null)
        throw new DaoException("Model class cannot be null");

    if (filter == null)
        filter = EMPTY_FILTER;

    DBObject dbObject = buildQueryFilter(modelClass, filter, null);

    DBCollection col = collection(modelClass, true);

    Long count = col.count(dbObject);

    if (count != null) {
        app.setQueryMetadata(QueryMetadata.builder().count(count).build());
    }

    return count;
}

@Override
protected Integer execute(DBCollection collection, MongoHandle mongoHandle) throws DBException
{
    int n = 0;
    try
    {
        n = collection.update(query, update, upsert, multi).getN();
    } catch (Exception e)
    {
        throw new DBException(e);
    }
    return n;
}

@Override
protected JSONArray execute(DBCollection collection, MongoHandle mongoHandle,
        QuerySettings querySettings) throws DBException
{
    Condition condition = getCondition();
    return mongoHandle.getJSONs(condition, querySettings, keys);
}

@Override
protected DBEnumeration<JSONObject> getDBEnumerations(DBCollection collection,
        MongoHandle mongoHandle, QuerySettings querySettings) throws DBException
{
    Condition condition = getCondition();
    return mongoHandle.getDBEnumerations(condition, querySettings, keys);
}

@Override
protected Object execute(DBCollection collection, MongoHandle mongoHandle) throws DBException
{
    try
    {
        collection.insert(dbObjects);
        return true;
    } catch (Exception e)
    {
        throw new DBException(e);
    }
}

private int DeleteDate(SQLDeleteStatement state) {
    SQLTableSource table=state.getTableSource();
    DBCollection coll =this._db.getCollection(table.toString());

    SQLExpr expr=state.getWhere();
    if (expr==null) {
        throw new RuntimeException("not where of sql");
    }
    DBObject query = parserWhere(expr);

    coll.remove(query);

    return 1;

}

private int dropTable(SQLDropTableStatement state) {        
    for (SQLTableSource table : state.getTableSources()){
        DBCollection coll =this._db.getCollection(table.toString());
        coll.drop();
    }
    return 1;

}

@ChangeSet(order = "01", author = "initiator", id = "01-addAuthorities")
public void addAuthorities(DB db) {
    DBCollection authorityCollection = db.getCollection("jhi_authority");
    authorityCollection.insert(
        BasicDBObjectBuilder.start()
            .add("_id", "ROLE_ADMIN")
            .get());
    authorityCollection.insert(
        BasicDBObjectBuilder.start()
            .add("_id", "ROLE_USER")
            .get());
}

@ChangeSet(order = "03", author = "initiator", id = "03-addSocialUserConnection")
public void addSocialUserConnection(DB db) {
    DBCollection socialUserConnectionCollection = db.getCollection("jhi_social_user_connection");
    socialUserConnectionCollection.createIndex(BasicDBObjectBuilder
            .start("user_id", 1)
            .add("provider_id", 1)
            .add("provider_user_id", 1)
            .get(),
        "user-prov-provusr-idx", true);
}

@ChangeSet(order = "04", author = "user", id = "04-addAuthorities-2")
public void addAuthorities2(DB db) {
    DBCollection authorityCollection = db.getCollection("jhi_authority");
    authorityCollection.insert(
        BasicDBObjectBuilder.start()
            .add("_id", "ROLE_MANAGER")
            .get());
    authorityCollection.insert(
        BasicDBObjectBuilder.start()
            .add("_id", "ROLE_SUPPORT")
            .get());
}

@ChangeSet(order = "05", author = "user", id = "05-addAuthorities-3")
public void addAuthorities3(DB db) {
    DBCollection authorityCollection = db.getCollection("jhi_authority");
    authorityCollection.insert(
        BasicDBObjectBuilder.start()
            .add("_id", "ROLE_ACTUATOR")
            .get());
}