org.stockwatcher.data.cassandra.UserDAOImpl.java Source code

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Here is the source code for org.stockwatcher.data.cassandra.UserDAOImpl.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.stockwatcher.data.cassandra;

import static com.datastax.driver.core.querybuilder.QueryBuilder.eq;
import static com.datastax.driver.core.querybuilder.QueryBuilder.set;
import static com.datastax.driver.core.querybuilder.QueryBuilder.update;
import static org.stockwatcher.data.cassandra.UserHelper.createUser;

import java.util.Date;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.UUID;

import javax.annotation.PostConstruct;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.stockwatcher.data.DAOException;
import org.stockwatcher.domain.User;

import com.datastax.driver.core.BoundStatement;
import com.datastax.driver.core.PreparedStatement;
import com.datastax.driver.core.Row;
import com.datastax.driver.core.Statement;
import com.datastax.driver.core.exceptions.DriverException;

/**
 * Implementation of the UserDAO interface for Apache Cassandra.
 * 
 * @author Tony Piazza
 */
@Repository
public class UserDAOImpl extends CassandraDAO implements CassandraUserDAO {
    @Autowired
    private CassandraWatchListDAO watchListDAO;

    private PreparedStatement selectUserById;
    private PreparedStatement selectUsers;

    @PostConstruct
    public void init() {
        selectUserById = prepare(
                "SELECT user_id, first_name, last_name, display_name, postal_code, email_address, active, updated FROM User WHERE user_id=?");
        selectUsers = prepare(
                "SELECT user_id, first_name, last_name, display_name, postal_code, email_address, active, updated FROM User");
    }

    @Override
    public SortedSet<User> getUsers() {
        return getUsers(getDefaultOptions());
    }

    @Override
    public SortedSet<User> getUsers(StatementOptions options) {
        SortedSet<User> users = new TreeSet<User>();
        try {
            BoundStatement bs = selectUsers.bind();
            for (Row row : execute(bs, options)) {
                UUID userId = row.getUUID("user_id");
                users.add(createUser(row, watchListDAO.getWatchListCountByUserId(options, userId)));
            }
        } catch (DriverException e) {
            throw new DAOException(e);
        }
        return users;
    }

    @Override
    public User getUser(UUID id) {
        return getUser(getDefaultOptions(), id);
    }

    @Override
    public User getUser(StatementOptions options, UUID id) {
        if (id == null) {
            throw new IllegalArgumentException("id is null");
        }
        try {
            BoundStatement bs = selectUserById.bind();
            bs.setUUID("user_id", id);
            Row row = execute(bs, options).one();
            if (row == null) {
                throw new DAOException("no user found with specified id");
            }
            return createUser(row, watchListDAO.getWatchListCountByUserId(options, id));
        } catch (DriverException e) {
            throw new DAOException(e);
        }
    }

    @Override
    public User updateUser(User user) {
        return updateUser(getDefaultOptions(), user);
    }

    @Override
    public User updateUser(StatementOptions options, User user) {
        if (user == null) {
            throw new IllegalArgumentException("user is null");
        }
        final UUID id = user.getId();
        if (id == null) {
            throw new IllegalStateException("id property is null");
        }

        // We assume that if the user_id is present, that it is valid

        Date now = new Date();
        try {
            Statement statement = update("User").with(set("first_name", user.getFirstName()))
                    .and(set("last_name", user.getLastName())).and(set("display_name", user.getDisplayName()))
                    .and(set("email_address", user.getEmailAddress())).and(set("postal_code", user.getPostalCode()))
                    .and(set("updated", now)).where(eq("user_id", id));
            execute(statement, options);
        } catch (DriverException e) {
            throw new DAOException(e);
        }
        user.setUpdated(now);
        return user;
    }
}