Example usage for com.mongodb.async.client MongoCollection createIndex

Introduction

In this page you can find the example usage for com.mongodb.async.client MongoCollection createIndex.

Prototype

void createIndex(Bson key, SingleResultCallback<String> callback);

Source Link

Document

Creates an index.

Usage

From source file:com.supermy.im.mongo.MongoRepository.java

License:Apache License

@Bean(name = "mongoCollection")
public MongoCollection mongoCollection() {
    System.out.println("*******************" + mycoll);

    final MongoDatabase mydb = mongoDatabase();

    /**//from ww w  . j a  v a  2s . c om
     * ??,?;?;
     * 1???,?,????;
     */
    if (!collectionExists(mycoll)) {
        final CountDownLatch countDownLatch = new CountDownLatch(1);//??

        mydb.createCollection(mycoll, new SingleResultCallback<Void>() {
            @Override
            public void onResult(final Void result, final Throwable t) {
                // logger.debug("?");

                MongoCollection coll = mydb.getCollection(mycoll);

                coll.createIndex(new Document("position", "2d"), new SingleResultCallback<Void>() {
                    @Override
                    public void onResult(final Void result, final Throwable t) {
                        // logger.debug("??");
                    }
                });

                //?
                Document expire = Document.parse("{time:1},{expireAfterSeconds:10*60}");
                coll.createIndex(expire, new SingleResultCallback<Void>() {
                    @Override
                    public void onResult(final Void result, final Throwable t) {
                        // logger.debug("??");
                    }
                });

                countDownLatch.countDown();
            }
        });
        try {
            countDownLatch.await(2, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }

    MongoCollection coll = mydb.getCollection(mycoll);
    // TODO: 16/5/10  ;?
    //> db.location.ensureIndex( {position: "2d"} )

    return coll;
}

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