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(ClientSession clientSession, Bson filter);

Source Link

Document

Counts the number of documents in the collection according to the given options.

Usage

From source file:net.netzgut.integral.mongo.internal.services.MongoODMImplementation.java

License:Apache License

@Override
public <T extends Serializable> long count(Bson filter, Class<T> entityClass, CountOptions options) {
    MongoCollection<Document> collection = this.mongo.getCollection(entityClass);
    return collection.count(filter, options);
}

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From source file:org.radarcns.mongo.util.MongoHelper.java

License:Apache License

/**
 * Finds whether document is available for given query parameters.
 * https://stackoverflow.com/a/8390458/822964 suggests find().limit(1).count(true) is the
 * optimal way to do it. In the Java driver, this is achieved by setting the count options.
 *
 * @param collection is the MongoDB that will be queried
 * @param projectName of the project//from w  w  w.  j  a va2s.  co m
 * @param subjectId is the subjectID
 * @param sourceId is the sourceID
 * @param timeFrame is the time frame of the queried timewindow
 * @return a MongoDB cursor containing all documents from the query.
 */
public static boolean hasDataForSource(MongoCollection<Document> collection, String projectName,
        String subjectId, String sourceId, TimeFrame timeFrame) {
    createIndexIfNotAvailable(collection, indexProjectSubjectSourceTimestart);
    return collection.count(filterSource(projectName, subjectId, sourceId, timeFrame),
            new CountOptions().limit(1)) > 0;
}

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