James之——添加自定义服务

最新推荐文章于 2024-09-01 19:06:15 发布

_细水长流

最新推荐文章于 2024-09-01 19:06:15 发布

阅读量838

点赞数

CC 4.0 BY-SA版权

分类专栏： James 文章标签： james pop3 自定义拓展

本文链接：https://blog.youkuaiyun.com/hjnth/article/details/80954867

Why？

通过POP3可以获取到james中指定用户收取到的所有邮件，但没有提供获取邮件发送状态、最近联系人功能。鉴于两者在服务端功能上相似，此文取简单的做一下介绍：获取最近联系人功能。

当然，可以在这上面进行更多的拓展，获取邮件的发送状态便是一个不错的功能，以后有时间再详细介绍下。

What？

可以站在巨人的肩膀上快速开发这个功能。其实james已经封装好了一套“流程”，添加几个类、接口、配置就可以了，如下图所示：

How？

内容主要分为两个部分：添加服务逻辑和配置。

1、服务逻辑

1.1 RecentContactsServer：

/****************************************************************
 * 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.apache.james.recentcontacts;

import org.apache.avalon.cornerstone.services.connection.ConnectionHandler;
import org.apache.james.core.AbstractJamesService;

public class RecentContactsServer extends AbstractJamesService implements RecentContactsHandlerMBean{

    /***
    * 获取服务处理对象
    */
    @Override
    protected ConnectionHandler newHandler() throws Exception {
        return new RecentContactsHandler();
    }

    /**
     * 服务名，在启动时显示
     */
    @Override
    public String getServiceType() {
        return "SearchMail Service";
    }
}

1.2 RecentContactsHandlerMBean：

/****************************************************************
 * 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.apache.james.recentcontacts;

/**
 * An interface to expose James management functionality through JMX.
 * 
 * @phoenix:mx-topic name="RecentContactsServer"
 */
public interface RecentContactsHandlerMBean {

    /**
    * @phoenix:mx-attribute
    * @phoenix:mx-description Returns flag indicating it this service is enabled 
    * @phoenix:mx-isWriteable no
    * 
    * @return boolean The enabled flag     
    */  
    public boolean isEnabled();

    /**
    * @phoenix:mx-attribute
    * @phoenix:mx-description Returns the port that the service is bound to 
    * @phoenix:mx-isWriteable no
    * 
    * @return int The port number     
    */  
    public int  getPort();
    
    /**
    * @phoenix:mx-attribute
    * @phoenix:mx-description Returns the address if the network interface the socket is bound to 
    * @phoenix:mx-isWriteable no
    * 
    * @return String The network interface name     
    */  
    public String  getNetworkInterface();
    
    /**
    * @phoenix:mx-attribute
    * @phoenix:mx-description Returns the server socket type,