Example usage for com.mongodb.client MongoCollection count

Introduction

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

Prototype

@Deprecated
long count();

Source Link

Document

Counts the number of documents in the collection.

Usage

From source file:com.imos.sample.SampleMongoDB.java

public static void main(String[] args) {
    MongoClientURI connectionString = new MongoClientURI("mongodb://localhost:27017");
    MongoClient mongoClient = new MongoClient(connectionString);
    MongoDatabase database = mongoClient.getDatabase("sampledb");
    MongoCollection<Document> collection = database.getCollection("sampleLog");
    System.out.println(collection.count());
    MongoCursor<Document> cursor = collection.find().iterator();
    ObjectMapper mapper = new ObjectMapper();
    try {//from  w  w w  .j a va  2 s  .co  m
        while (cursor.hasNext()) {
            try {
                System.out.println(mapper.writerWithDefaultPrettyPrinter().writeValueAsString(cursor.next()));
            } catch (JsonProcessingException ex) {
                Logger.getLogger(SampleMongoDB.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
    } finally {
        cursor.close();
    }
}

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From source file:com.imos.sample.SampleMongoDB.java

private static void sampleOne(MongoDatabase database) throws JsonProcessingException {
    MongoCollection<Document> collection = database.getCollection("test");
    Document doc = new Document("name", "MongoDB").append("type", "database").append("count", 1)
            .append("versions", Arrays.asList("v3.2", "v3.0", "v2.6"))
            .append("info", new Document("x", 203).append("y", 102));
    //        collection.insertOne(doc);
    System.out.println(collection.count());
    MongoCursor<Document> cursor = collection.find().iterator();
    ObjectMapper mapper = new ObjectMapper();
    //        try {
    //            while (cursor.hasNext()) {
    ////                System.out.println(mapper.writerWithDefaultPrettyPrinter().writeValueAsString(cursor.next()));
    //            }
    //        } finally {
    //            cursor.close();
    //        }/*  w  w w.  jav  a2s.  co m*/

    Document myDoc = collection.find(eq("type", "database")).first();
    System.out.println(myDoc.toJson());
}

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From source file:com.jaeksoft.searchlib.crawler.database.DatabaseCrawlMongoDb.java

License:Open Source License

@Override
public String test() throws Exception {
    URI uri = new URI(getUrl());
    StringBuilder sb = new StringBuilder();
    if (!"mongodb".equals(uri.getScheme()))
        throw new SearchLibException(
                "Wrong scheme: " + uri.getScheme() + ". The URL should start with: mongodb://");
    MongoClient mongoClient = null;/*from ww w .  ja  v  a 2 s .  co  m*/
    try {
        mongoClient = getMongoClient();
        sb.append("Connection established.");
        sb.append(StringUtils.LF);
        if (!StringUtils.isEmpty(databaseName)) {
            MongoDatabase db = mongoClient.getDatabase(databaseName);
            if (db == null)
                throw new SearchLibException("Database not found: " + databaseName);
            MongoIterable<String> collections = db.listCollectionNames();
            if (collections == null)
                throw new SearchLibException("No collection found.");
            sb.append("Collections found:");
            sb.append(StringUtils.LF);
            for (String collection : collections) {
                sb.append(collection);
                sb.append(StringUtils.LF);
            }
            if (!StringUtils.isEmpty(collectionName)) {
                MongoCollection<?> dbCollection = db.getCollection(collectionName);
                if (dbCollection == null)
                    throw new SearchLibException("Collection " + collectionName + " not found.");
                sb.append(
                        "Collection " + collectionName + " contains " + dbCollection.count() + " document(s).");
                sb.append(StringUtils.LF);
                if (!StringUtils.isEmpty(criteria)) {
                    long count = dbCollection.count(getCriteriaObject());
                    sb.append("Query returns " + count + " document(s).");
                    sb.append(StringUtils.LF);
                }
            }
        }
    } finally {
        if (mongoClient != null)
            mongoClient.close();
    }
    return sb.toString();
}

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From source file:com.mycompany.megadatamongo.Main.java

public static void main(String[] args) throws IOException {
    Main app = new Main();
    MongoCollection<Document> collection = app.db.getCollection("bigCollection");
    //        collection.insertOne(new Document("abcd", "{'name':'bla', 'con':'la'}"));
    app.gn.generate(collection, 500000000);
    System.out.println("Test: " + collection.count());

    //        BasicDBObject query = new BasicDBObject("abc", new BasicDBObject("$exists", true));
    //        /*from  w w  w . j  a  v a  2 s . c om*/
    ////        query.get("abcd");
    //        FindIterable<Document> docs = collection.find(query);
    //        for (Document doc : docs) {
    //            System.out.println("Doc: "+doc.toJson());
    //        }
}

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From source file:com.torodb.testing.mongodb.docker.ReplicaSetContract.java

License:Apache License

@Test
default void genericTest() {
    int docsToInsert = 100;

    try (ReplicaSet replicaSet = getReplicaSet(simpleReplConfig())) {
        replicaSet.startAsync();//from w ww.  j a va2  s .com
        replicaSet.awaitRunning();

        getLogger().debug("Inserting {} documents on {}", docsToInsert, replicaSet.getReplSetName());
        MongoDatabase db = replicaSet.getClient().getDatabase("testDb");
        MongoCollection<Document> col = db.getCollection("testCol")
                .withWriteConcern(replicaSet.getTotalWriteConcern());
        for (int i = 0; i < docsToInsert; i++) {
            col.insertOne(new Document());
        }

        Assertions.assertEquals(docsToInsert, col.count());

        for (ReplMongod mongo : replicaSet.getMongos()) {
            getLogger().debug("Assertions on node {}", mongo);

            long oplogCount = mongo.getMongoClient().getDatabase("local").getCollection("rs.oplog").count();

            Assertions.assertNotEquals(0, oplogCount, "Oplog on node " + mongo + " is empty");

            long colCount = mongo.getMongoClient().getDatabase("testDb").getCollection("testCol").count();

            Assertions.assertEquals(docsToInsert, colCount, "Incorrect number of documents replicated");
        }
    }
}

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From source file:com.torodb.testing.mongodb.docker.ShardedClusterContract.java

License:Apache License

@Test
default void startAndStop() {

    try (ShardedCluster cluster = getShardedCluster(smallShardedClusterConfig())) {
        getLogger().debug("Starting cluster...");
        cluster.startAsync();/* w ww.j  a v a  2  s . c om*/
        cluster.awaitRunning();

        getLogger().debug("Cluster has been started");
        getLogger().debug("Configuring cluster");

        cluster.enableSharding("testDb");
        cluster.shardCollection("testDb", "testCol");
        cluster.setChunckSize(1);

        getLogger().debug("Sharding has been configured");

        getLogger().debug("Inserting documents");

        int docsToInsert = 10_000;

        MongoDatabase db = cluster.getClient().getDatabase("testDb");
        MongoCollection<Document> col = db.getCollection("testCol");
        for (int i = 0; i < docsToInsert; i++) {
            col.insertOne(new Document());
        }

        getLogger().debug("Documents have been inserted");

        Assertions.assertEquals(docsToInsert, col.count());
    }
}

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From source file:com.twiceagain.handlers.logic.MyLogicHandlerInternal.java

License:Open Source License

public MyLogicHandlerInternal(PipedHttpHandler next, Map<String, Object> args) {
    super(next, args);

    System.out.printf("\n******Constructing %s with args = %s *******\n", this.getClass(), args);

    // Get client - mongo driver version 3.2
    CLIENT = MongoDBClientSingleton.getInstance().getClient();

    // Create auto-refreshing cache for the request
    CACHE = CacheFactory.createLocalLoadingCache(1, // cache size, 
            Cache.EXPIRE_POLICY.AFTER_WRITE, 5000, // 5 seconds
            (String key) -> {//from ww  w .  j ava2  s . co  m
                // Lamda to create content associated with key
                System.out.printf("\n*** Constructing cache for key = %s***", key);
                MongoCollection<Document> coll = CLIENT.getDatabase("auth").getCollection("users");
                long nbusers = coll.count();

                // Build Document for response
                Document doc = new Document("countOfUsersInDatabase", nbusers).append("another",
                        new Document("mytest", new ArrayList<>()));
                // And save it to cache
                return doc;
            });

}

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From source file:connector.DBConnector.java

public static int getNumberOfTwitterUsers() {

    MongoCollection<Document> coll = database.getCollection("tweets");

    /*//from www  .  j av a 2s .co  m
    Well, the root cause of the error here is because you have a String type as expected output and one of the distinct values is actually null.
     */
    //Or accept the results as BsonValue and handle those:
    ArrayList<BsonValue> distinctUsers = coll.distinct("user", BsonValue.class).into(new ArrayList<>());

    /*
    But in the latter case, you still need to handle the types returned. 
    There are methods on BsonValue to allow you to code for this, but it is also a fair bit of overkill for just getting a list of distinct values.
     */
    System.out.println("Collection size: " + coll.count());
    System.out.println("Unique users: " + distinctUsers.size());

    return distinctUsers.size();

}

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From source file:controller.ProductController.java

public int getIndex() {
    Document doc = new Document();
    MongoCollection<Document> col = db.getCollection("product");
    if (col.count() <= 0)
        return 0;
    for (Document d : col.find())
        doc = d;//from  w  w  w  .j a  v a 2 s  .  c  o  m
    int j = (int) doc.get("itemId");
    return j + 1;
}

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From source file:controller.UserController.java

public int getIndex() {
    Document doc = new Document();
    MongoCollection<Document> col = db.getCollection("user");
    if (col.count() <= 0)
        return 0;
    return (int) col.count();
    //        for(Document d: col.find()) doc = d;
    //        int j =(int) doc.get("itemId");
    //        return j+1;
}

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