com.feilong.net.mail.SessionFactory Maven / Gradle / Ivy

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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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/*
 * Copyright (C) 2008 feilong
 *
 * 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.feilong.net.mail;

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Session;

import com.feilong.core.Validate;
import com.feilong.net.mail.builder.AuthenticatorBuilder;
import com.feilong.net.mail.builder.SessionPropertiesBuilder;
import com.feilong.net.mail.entity.SessionConfig;

/**
 * 根据邮件会话属性和密码验证器构造邮件的{@link javax.mail.Session}.
 *
 * @author feilong
 * @since 1.0.9
 */
public class SessionFactory{

    /** Don't let anyone instantiate this class. */
    private SessionFactory(){
        //AssertionError不是必须的. 但它可以避免不小心在类的内部调用构造器. 保证该类在任何情况下都不会被实例化.
        //see 《Effective Java》 2nd
        throw new AssertionError("No " + getClass().getName() + " instances for you!");
    }

    //---------------------------------------------------------------

    /**
     * 根据邮件会话属性和密码验证器构造邮件的{@link javax.mail.Session}.
     * 
     * @param sessionConfig
     *            mailSenderInfo
     * @return Session
     * @see javax.mail.Session#getDefaultInstance(Properties, Authenticator)
     */
    public static Session createSession(SessionConfig sessionConfig){
        //since 1.13.2
        Validate.notNull(sessionConfig, "sessionConfig can't be null!");

        //---------------------------------------------------------------
        Authenticator authenticator = AuthenticatorBuilder.build(sessionConfig);
        Properties properties = SessionPropertiesBuilder.build(sessionConfig);

        //---------------------------------------------------------------

        // 根据邮件会话属性和密码验证器构造一个发送邮件的session
        Session session = Session.getDefaultInstance(properties, authenticator);
        session.setDebug(sessionConfig.getIsDebug());
        return session;
    }
}