Example usage for com.mongodb DBCollection drop

Introduction

In this page you can find the example usage for com.mongodb DBCollection drop.

Prototype

public void drop() 

Source Link

Document

Drops (deletes) this collection from the database.

Usage

From source file:org.eclipse.birt.report.engine.dataextraction.mongodb.MongoDataExtractionUtil.java

License:Open Source License

/**
 * @param mongoDbUrl/*from   w  w  w .j  a  v a2 s .c o m*/
 * @param mongodb
 *            url mongoDbport mongodb port default 27017 mongoDb
 * @param mongodb
 *            to connect to dBCollection defaulted to reportname
 * 
 * @return DBCollection
 * @throws BirtException
 */

/*
 * Enhancements: Pass the opcode paramater to perform truncate & load or
 * Delta load
 */
public static DBCollection createCollection(String dB, String dBCollection) throws BirtException {
    DBCollection cursor = null;
    try {
        db = client.getDB(dB);
        cursor = db.getCollection(dBCollection);
    } catch (Exception e) {
        throw new BirtException(e.getMessage());
    }
    /*
     * Truncate and load the data remove the below line to make it as delta
     * load to the collection
     */
    cursor.drop();
    return cursor;
}

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From source file:org.eclipselabs.emongo.example.ExampleComponent.java

License:Open Source License

public void activate() {
    DB database = mongoDatabaseProvider.getDB();
    DBCollection collection = database.getCollection("items");
    collection.drop();

    for (int i = 0; i < 10; i++)
        collection.insert(new BasicDBObject("x", i));

    DBCursor cursor = collection.find();

    while (cursor.hasNext())
        System.out.print(cursor.next().get("x") + " ");

    System.out.println();/*ww w. java2  s . c o m*/
    collection.drop();
}

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From source file:org.einherjer.week2.samples.DotNotationSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection lines = db.getCollection("dotNotationSample");
    lines.drop();
    Random rand = new Random();

    // insert 10 lines with random start and end points
    for (int i = 0; i < 10; i++) {
        lines.insert(/*from w ww . java 2  s .  co  m*/
                new BasicDBObject("_id", i)
                        .append("start",
                                new BasicDBObject("x", rand.nextInt(90) + 10).append("y",
                                        rand.nextInt(90) + 10))
                        .append("end", new BasicDBObject("x", rand.nextInt(90) + 10).append("y",
                                rand.nextInt(90) + 10)));
    }

    QueryBuilder builder = QueryBuilder.start("start.x").greaterThan(50);

    DBCursor cursor = lines.find(builder.get(), new BasicDBObject("start.y", true).append("_id", false));

    try {
        while (cursor.hasNext()) {
            DBObject cur = cursor.next();
            System.out.println(cur);
        }
    } finally {
        cursor.close();
    }
}

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From source file:org.einherjer.week2.samples.FieldSelectionSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection collection = db.getCollection("fieldSelectionSample");
    collection.drop();
    Random rand = new Random();

    // insert 10 documents with two random integers
    for (int i = 0; i < 10; i++) {
        collection.insert(new BasicDBObject("x", rand.nextInt(2)).append("y", rand.nextInt(100)).append("z",
                rand.nextInt(1000)));/* ww  w .j  a va2 s.c  o m*/
    }

    DBObject query = QueryBuilder.start("x").is(0).and("y").greaterThan(10).lessThan(70).get();

    //use second find parameter to filter the returned fields
    DBCursor cursor = collection.find(query, new BasicDBObject("y", true).append("_id", false));
    try {
        while (cursor.hasNext()) {
            DBObject cur = cursor.next();
            System.out.println(cur);
        }
    } finally {
        cursor.close();
    }
}

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From source file:org.einherjer.week2.samples.FindAndModifySample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    DBCollection collection = createCollection();
    collection.drop();

    final String counterId = "abc";
    int first;/* w  w  w.  j av  a2s .  c  om*/
    int numNeeded;

    numNeeded = 2;
    first = getRange(counterId, numNeeded, collection);
    System.out.println("Range: " + first + "-" + (first + numNeeded - 1));

    numNeeded = 3;
    first = getRange(counterId, numNeeded, collection);
    System.out.println("Range: " + first + "-" + (first + numNeeded - 1));

    numNeeded = 10;
    first = getRange(counterId, numNeeded, collection);
    System.out.println("Range: " + first + "-" + (first + numNeeded - 1));

    System.out.println();

    printCollection(collection);
}

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From source file:org.einherjer.week2.samples.FindCriteriaSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection collection = db.getCollection("findCriteriaSample");
    collection.drop();

    // insert 10 documents with two random integers
    for (int i = 0; i < 10; i++) {
        collection/* ww w  .  j a v  a2s.com*/
                .insert(new BasicDBObject("x", new Random().nextInt(2)).append("y", new Random().nextInt(100)));
    }

    //1- The query document can be created by using a QueryBuilder...
    QueryBuilder builder = QueryBuilder.start("x").is(0).and("y").greaterThan(10).lessThan(70);
    //2- or, the query document can be created manually
    DBObject query = new BasicDBObject("x", 0).append("y", new BasicDBObject("$gt", 10).append("$lt", 90));

    System.out.println("\nCount:");
    long count = collection.count(builder.get());
    System.out.println(count);

    System.out.println("\nFind all: ");
    DBCursor cursor = collection.find(builder.get());
    try {
        while (cursor.hasNext()) {
            DBObject cur = cursor.next();
            System.out.println(cur);
        }
    } finally {
        cursor.close();
    }
}

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From source file:org.einherjer.week2.samples.FindSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection collection = db.getCollection("findSample");
    collection.drop();

    // insert 10 documents with a random integer as the value of field "x"
    for (int i = 0; i < 10; i++) {
        collection.insert(new BasicDBObject("x", new Random().nextInt(100)));
    }/*from  ww  w  . jav a 2s  .  c  o m*/

    System.out.println("Find one:");
    DBObject one = collection.findOne();
    System.out.println(one);

    System.out.println("\nFind all: ");
    DBCursor cursor = collection.find();
    try {
        while (cursor.hasNext()) {
            DBObject cur = cursor.next();
            System.out.println(cur);
        }
    } finally {
        cursor.close();
    }

    System.out.println("\nCount:");
    long count = collection.count();
    System.out.println(count);
}

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From source file:org.einherjer.week2.samples.InsertSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB courseDB = client.getDB("course");
    DBCollection collection = courseDB.getCollection("insertSample");

    collection.drop();

    DBObject doc = new BasicDBObject().append("x", 1);
    System.out.println(doc);//from www .  j a  v  a2s . co m
    collection.insert(doc);
    System.out.println(doc); //_id field gets generated

    DBObject doc2 = new BasicDBObject("_id", new ObjectId()).append("x", 1);
    System.out.println(doc2);
    collection.insert(doc2);
    System.out.println(doc2); //same as doc1

    DBObject doc3 = new BasicDBObject("_id", "123").append("x", 1);
    System.out.println(doc3);
    collection.insert(doc3);
    System.out.println(doc3); //_id field set by to a type different than ObjectId

    collection.insert(doc); //duplicate exception

}

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From source file:org.einherjer.week2.samples.SortSkipLimitSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection lines = db.getCollection("sortSkipLimitSample");
    lines.drop();
    Random rand = new Random();

    // insert 10 lines with random start and end points
    for (int i = 0; i < 10; i++) {
        lines.insert(new BasicDBObject("_id", i)
                .append("start", new BasicDBObject("x", rand.nextInt(2)).append("y", rand.nextInt(90) + 10))
                .append("end", new BasicDBObject("x", rand.nextInt(2)).append("y", rand.nextInt(90) + 10)));
    }/*  w ww.ja v  a 2s  . c  o m*/

    DBCursor cursor = lines.find().sort(new BasicDBObject("start.x", 1).append("start.y", -1)).skip(2)
            .limit(10);

    try {
        while (cursor.hasNext()) {
            DBObject cur = cursor.next();
            System.out.println(cur);
        }
    } finally {
        cursor.close();
    }
}

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From source file:org.einherjer.week2.samples.UpdateRemoveSample.java

License:Apache License

private static DBCollection createCollection() throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection collection = db.getCollection("updateRemoveSample");
    collection.drop();
    return collection;
}

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