Example usage for com.mongodb.client MongoDatabase runCommand

Introduction

In this page you can find the example usage for com.mongodb.client MongoDatabase runCommand.

Prototype

Document runCommand(ClientSession clientSession, Bson command);

Source Link

Document

Executes the given command in the context of the current database with a read preference of ReadPreference#primary() .

Usage

From source file:es.omarall.mtc.TailingTask.java

License:Apache License

public TailingTask(MTCConfiguration configuration) {

    // Check configuration is VALID
    configuration.isValid();//from w w w. j a va2  s  .  co m
    LOG.debug("MTCConfiguration: VALID\n{}", configuration.toString());

    this.configuration = configuration;

    MongoDatabase mongoDatabase = configuration.getMongoDatabase();
    String collectionName = configuration.getCollection();
    cappedCollection = mongoDatabase.getCollection(collectionName);

    // Check cappedCollection is a capped collection...
    final Document collStatsCommand = new Document("collStats", collectionName);
    Boolean isCapped = mongoDatabase.runCommand(collStatsCommand, ReadPreference.primary())
            .getBoolean("capped");
    if (!isCapped) {
        throw new CappedCollectionRequiredException(
                "Tailable cursors are only compatible with capped collections, and collection " + collectionName
                        + " is not capped.");
    }

    // Is Capped.
    LOG.debug("Collection {} is CAPPED as expected", collectionName);

    // Persistent TRACKING ENABLED? If enabled tracker != null &&
    // cursorRegenerationDelay != 0
    if (configuration.isPersistentTrackingEnable()) {
        LOG.debug("Persistent tracking is ENABLED");
        tracker = new PersistentTrackingManager(configuration);
        cursorRegenerationDelay = getConfiguration().getPersistentTrackingConfiguration()
                .getCursorRegenerationDelay();
        if (cursorRegenerationDelay == 0) {
            cursorRegenerationDelay = MTCPersistentTrackingConfiguration.DEFAULT_CURSOR_REGENERATION_DELAY;
        }
    }
}

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From source file:io.mandrel.common.mongo.MongoUtils.java

License:Apache License

public static void checkCapped(MongoDatabase database, String collectionName, int size, int maxDocuments) {
    if (Lists.newArrayList(database.listCollectionNames()).contains(collectionName)) {
        log.debug("'{}' collection already exists...", collectionName);

        // Check if already capped
        Document command = new Document("collStats", collectionName);
        boolean isCapped = database.runCommand(command, ReadPreference.primary()).getBoolean("capped")
                .booleanValue();//from  ww w. j  a va 2 s  .  c  om

        if (!isCapped) {
            log.info("'{}' is not capped, converting it...", collectionName);
            command = new Document("convertToCapped", collectionName).append("size", size).append("max",
                    maxDocuments);
            database.runCommand(command, ReadPreference.primary());
        } else {
            log.debug("'{}' collection already capped!", collectionName);
        }

    } else {
        database.createCollection(collectionName,
                new CreateCollectionOptions().capped(true).maxDocuments(maxDocuments).sizeInBytes(size));
    }
}

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