commandlistservmanager.java

java 开发的邮件服务器平台。支持以下协议。 协议可以修改为自己的专门标识

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 * Copyright (c) 2000-2004 The Apache Software Foundation.             *
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 * ------------------------------------------------------------------- *
 * 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:                                *
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 * permissions and limitations under the License.                      *
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package org.apache.james.transport.mailets;

import org.apache.avalon.framework.component.ComponentManager;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.james.Constants;
import org.apache.james.services.UsersRepository;
import org.apache.james.services.UsersStore;
import org.apache.james.transport.mailets.listservcommands.ErrorCommand;
import org.apache.james.transport.mailets.listservcommands.IListServCommand;
import org.apache.james.util.XMLResources;
import org.apache.mailet.GenericMailet;
import org.apache.mailet.Mail;
import org.apache.mailet.MailAddress;

import javax.mail.MessagingException;
import java.io.File;
import java.lang.reflect.Field;
import java.util.*;

/**
 * CommandListservManager is the default implementation of {@link ICommandListservManager}.
 * It loads all the configured {@link IListServCommand}s and delegates to them at runtime.
 * <br />
 *
 * It isn't responsible for procesing messages sent to the main mailing list, but is responsible for
 * individual commands sent by users, such as: info, subscribe, etc...
 * <br />
 *
 * Requests sent to the CommandListservManager take the form of:
 * <pre>
 * &lt;listName&gt;-&lt;commandName&gt;@domain
 * </pre>
 *
 * If the command isn't recognized an error will be sent using {@link #onError}.
 * <br />
 * <br />
 *
 * The configuration for this mailet sould be in the 'root' processor block.
 * <pre>
 * &lt;mailet match="CommandListservMatcher=announce@localhost" class="CommandListservManager"&gt;
 *  &lt;listName&gt;announce&lt;/listName&gt;
 *  &lt;displayName&gt;Announce mailing list&lt;/displayName&gt;
 *  &lt;listOwner&gt;owner@localhost&lt;/listOwner&gt;
 *  &lt;repositoryName&gt;list-announce&lt;/repositoryName&gt;
 *  &lt;listDomain&gt;localhost&lt;/listDomain&gt;
 *
 *  &lt;commandpackages&gt;
 *     &lt;commandpackage&gt;org.apache.james.transport.mailets.listservcommands&lt;/commandpackage&gt;
 *  &lt;/commandpackages&gt;
 *
 *  &lt;commands&gt;
 *     &lt;command name="subscribe" class="Subscribe"/&gt;
 *     &lt;command name="subscribe-confirm" class="SubscribeConfirm"/&gt;
 *     &lt;command name="unsubscribe" class="UnSubscribe"/&gt;
 *     &lt;command name="unsubscribe-confirm" class="UnSubscribeConfirm"/&gt;
 *     &lt;command name="error" class="ErrorCommand"/&gt;
 *     &lt;command name="owner" class="Owner"/&gt;
 *     &lt;command name="info" class="Info"/&gt;
 *  &lt;/commands&gt;
 * &lt;/mailet&gt;
 * </pre>
 *
 * <br />
 * <br />
 * Todo: refine the command matching so we can have more sophistciated commands such as:
 * <pre>
 * &lt;listName&gt;-&lt;commandName&gt;-&lt;optCommandParam&gt;@domain
 * </pre>
 *
 * @version CVS $Revision: 1.1.2.4 $ $Date: 2004/03/30 02:15:24 $
 * @since 2.2.0
 */
public class CommandListservManager extends GenericMailet implements ICommandListservManager {

    protected Map commandMap = new HashMap();
    protected List commandPackages = new ArrayList();
    protected UsersRepository usersRepository;
    protected String listName;
    protected String displayName;
    protected String listOwner;
    protected String listDomain;
    protected XMLResources xmlResources;

    /**
     * Get the name of this list specified by the config param: 'listName'.
     * <br />
     * eg: <pre>&lt;listName&gt;announce&lt;/listName&gt;</pre>
     *
     * @param displayFormat is whether you want a display version of this or not
     * @return the official display name of this list
     */
    public String getListName(boolean displayFormat) {
        return displayFormat ? displayName : listName;
    }

    /**
     * Gets the owner of this list specified by the config param: 'listOwner'.
     * <br />
     * eg: <pre>&lt;listOwner&gt;owner@localhost&lt;/listOwner&gt;</pre>
     *
     * @return this is an address like listOwner@localhost
     */
    public String getListOwner() {
        return listOwner;
    }

    /**
     * Get the domain of the list specified by the config param: 'listDomain'.
     * <br />
     * eg: <pre>&lt;listDomain&gt;localhost&lt;/listDomain&gt;</pre>
     *
     * @return a string like localhost
     */
    public String getListDomain() {
        return listDomain;
    }

    /**
     * Get a specific command specified by the 'commands' configuration block.
     * For instance:
     * <pre>
     * &lt;commands&gt;
     *  &lt;command name="subscribe" class="Subscribe"/&gt;
     *  &lt;command name="subscribe-confirm" class="SubscribeConfirm"/&gt;
     *  &lt;command name="unsubscribe" class="UnSubscribe"/&gt;
     *  &lt;command name="unsubscribe-confirm" class="UnSubscribeConfirm"/&gt;
     *  &lt;command name="error" class="ErrorCommand"/&gt;
     *  &lt;command name="owner" class="Owner"/&gt;
     *  &lt;command name="info" class="Info"/&gt;
     * &lt;/commands&gt;
     * </pre>
     * @param name case in-sensitive
     * @return a {@link IListServCommand} if found, null otherwise
     */
    public IListServCommand getCommand(String name) {
        return (IListServCommand) commandMap.get(name.toLowerCase());
    }

    /**
     * Get all the available commands
     * @return a map of {@link IListServCommand}
     * @see #getCommand
     */
    public Map getCommands() {
        return commandMap;
    }

    /**
     * Get the current user repository for this list serv
     * @return an instance of {@link UsersRepository} that is used for the member list of the list serv
     */
    public UsersRepository getUsersRepository() {
        return usersRepository;
    }

    /**
     * An error occurred, send some sort of message
     * @param subject the subject of the message to send
     * @param mail
     * @param errorMessage
     */
    public void onError(Mail mail, String subject, String errorMessage) throws MessagingException {
        ErrorCommand errorCommand = (ErrorCommand) getCommand("error");
        errorCommand.onError(mail, subject, errorMessage);
    }

    /**
     * @return the configuration file for the xml resources
     */
    public String getResourcesFile() {
        return getInitParameter("resources");
    }

    /**
     * Use this to get standard properties for future calls to {@link org.apache.james.util.XMLResources}
     * @return properties with the "LIST_NAME" and the "DOMAIN_NAME" properties
     */
    public Properties getStandardProperties() {
        Properties standardProperties = new Properties();
        standardProperties.put("LIST_NAME", getListName(false));
        standardProperties.put("DISPLAY_NAME", getListName(true));
        standardProperties.put("DOMAIN_NAME", getListDomain());
        return standardProperties;
    }

    /**
     * Initializes an array of resources
     * @param names such as 'header, footer' etc...
     * @return an initialized array of XMLResources
     * @throws ConfigurationException
     */
    public XMLResources[] initXMLResources(String[] names) throws ConfigurationException {
        try {
            File xmlFile = new File(getResourcesFile());