/*
* Copyright (c) 2008 - 2013 10gen, Inc. <http://10gen.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.tengen;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.MongoClient;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.List;
public class UpdateRemoveTest {
public static void main(String[] args) throws UnknownHostException {
DBCollection collection = createCollection();
List<String> names = Arrays.asList("alice", "bobby", "cathy", "david", "ethan");
for (String name : names) {
collection.insert(new BasicDBObject("_id", name));
}
// see scratch method
printCollection(collection);
}
// these are all the statement I used throughout the lecture.
private static void scratch(DBCollection collection) {
collection.update(new BasicDBObject("_id", "alice"),
new BasicDBObject("age", 24));
collection.update(new BasicDBObject("_id", "alice"),
new BasicDBObject("$set", new BasicDBObject("age", 24)));
collection.update(new BasicDBObject("_id", "alice"),
new BasicDBObject(new BasicDBObject("gender", "F")));
collection.update(new BasicDBObject("_id", "frank"),
new BasicDBObject("$set", new BasicDBObject("age", 24)), true, false);
collection.update(new BasicDBObject(),
new BasicDBObject("$set", new BasicDBObject("title", "Dr")), false, true);
collection.remove(new BasicDBObject("_id", "frank"));
}
private static DBCollection createCollection() throws UnknownHostException {
MongoClient client = new MongoClient();
DB db = client.getDB("course");
DBCollection collection = db.getCollection("UpdateRemoveTest");
collection.drop();
return collection;
}
private static void printCollection(final DBCollection collection) {
DBCursor cursor = collection.find().sort(new BasicDBObject("_id", 1));
try {
while (cursor.hasNext()) {
System.out.println(cursor.next());
}
} finally {
cursor.close();
}
}
}