base.jee.api.cassandra.SendEmail Maven / Gradle / Ivy

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/**
 * Creative commons Attribution-NonCommercial license.
 *
 * http://creativecommons.org/licenses/by-nc/2.5/au/deed.en_GB
 *
 * NO WARRANTY IS GIVEN OR IMPLIED, USE AT YOUR OWN RISK.
 */
package base.jee.api.cassandra;

import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Date;
import java.util.Map;

import base.Command;
import base.jee.api.model.Email;
import base.security.User;
import base.uuid.UUID;
import com.datastax.driver.core.Session;

import static base.jee.api.cassandra.util.Log.log;

/**
 * Send an email. Email is not immediately sent, but stored in an email delivery queue.
 */
public class SendEmail extends Command {

	private CassandraAPI api;
	private User user;
	private Email email;

	public SendEmail(CassandraAPI api, User user, String email) throws IOException {
		if(api == null) {
			throw new IllegalArgumentException("Invalid parameter: api");
		}
		if(user == null || !user.isAuthenticated()) {
			throw new IllegalArgumentException("Requires an authenticated user.");
		}
		if(email == null || email.length() == 0) {
			throw new IllegalArgumentException("Invalid parameter: email");
		}

		this.api = api;
		this.user = user;
		this.email = new Email(email);
	}

	@Override
	public Command newWithParameters(Map parameters) throws IOException {
		return new SendEmail(
				(CassandraAPI)parameters.get("api"),
				(User)parameters.get("user"),
				(String)parameters.get("email"));
	}

	@Override
	protected void execute() throws IOException {
		Connection c = null;
		PreparedStatement s = null;
		Session sn = api.getCassandraSession();

		try {
			c = api.getDataSource().getConnection();
			c.setAutoCommit(false);

			if(!user.isAuthenticated()) {
				c.rollback();
				log(sn, "WARN", user, "Permission denied invoking: " + SendEmail.class.getSimpleName() + " " + getJsonParameters());
				c.commit();
				throw new IllegalStateException("You do not have permission to send email.");
			}

			s = c.prepareStatement("insert into email (uuid,to_address,email,retries,attempt_at,in_progress) values(?,?,?,0,?,0)");
			s.setString(1, new UUID().toString());
			s.setString(2, email.getTo());
			s.setString(3, email.toJson());
			s.setLong(4, new Date().getTime());
			s.execute();
			s.close();
			s = null;

			c.commit();
			c.close();
			c = null;
		} catch(SQLException e) {
			throw new IOException(e);
		} finally {
			if(s != null) { try { s.close(); } catch(SQLException e) {} }
			if(c != null) {
				try { c.rollback(); } catch (SQLException e) { }
				try { c.close(); } catch (SQLException e) { }
			}
		}
	}

	@Override
	public String getJsonParameters() {
		return "{" +
				"\"person\":" + user.getPersonUuid() + "" +
				"}";
	}

}