Examples of org.apache.mailet.Matcher

org.apache.mailet.Matcher
This interface define the behaviour of the message "routing" inside the mailet container. The match(Mail) method returns a Collection of recipients that meet this class's criteria.
An important feature of the mailet container is the ability to fork processing of messages. When a message first arrives at the server, it might have multiple recipients specified. As a message is passed to a matcher, the matcher might only "match" one of the listed recipients. It would then return only the matching recipient in the Collection. The mailet container should then duplicate the message splitting the recipient list across the two messages as per what the matcher returned.
[THIS PARAGRAPH NOT YET IMPLEMENTED] The matcher can extend this forking to further separation by returning a Collection of Collection objects. This allows a matcher to fork multiple processes if there are multiple recipients that require separate processing. For example, we could write a ListservMatcher that handles multiple listservs. When someone cross-posts across multiple listservs that this matcher handles, it could put each listserv address (recipient) that it handles in a separate Collection object. By returning each of these Collections within a container Collection object, it could indicate to the mailet container how many forks to spawn.
This interface defines methods to initialize a matcher, to match messages, and to remove a matcher from the server. These are known as life-cycle methods and are called in the following sequence:
1. The matcher is constructed, then initialized with the init method.
2. Any calls from clients to the match method are handled.
3. The matcher is taken out of service, then destroyed with the destroy method, then garbage collected and finalized.
In addition to the life-cycle methods, this interface provides the getMatcherConfig method, which the matcher can use to get any startup information, and the getMatcherInfo method, which allows the matcher to return basic information about itself, such as author, version, and copyright. @version 1.0.0, 24/04/1999 @author Federico Barbieri @author Serge Knystautas

                    String mailetClassName = c.getString("[@class]");
                    String matcherName = c.getString("[@match]", null);
                    String invertedMatcherName = c.getString("[@notmatch]", null);
                
                    Mailet mailet = null;
                    Matcher matcher = null;
                    try {


                        if (matcherName != null && invertedMatcherName != null) {
                            // if no matcher is configured throw an Exception
                            throw new ConfigurationException("Please configure only match or nomatch per mailet");

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            }


            List<Matcher> matchers =  container.getMatchers();
            for (int i = 0; i < matchers.size(); i++) {
                MatcherManagement matcherManagement;
                Matcher matcher = matchers.get(i);
                
                // check if the matcher is an instance of MatcherManagement. If not create a wrapper around it. This will give us not all
                // statistics but at least a few of them
                if (matcher instanceof MatcherManagement) {
                   matcherManagement = (MatcherManagement) matcher;

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                    if (theClassLoader == null) {
                        theClassLoader = this.getClass().getClassLoader();
                    }


                    Matcher matcher = (Matcher) theClassLoader.loadClass(className).newInstance();
                    matcher.init(configImpl);
                    return matcher;
                } catch (ClassNotFoundException cnfe) {
                    //do this so we loop through all the packages
                }
            }

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                {
                    Configuration c = mailetConfs[j];
                    String mailetClassName = c.getAttribute("class");
                    String matcherName = c.getAttribute("match");
                    Mailet mailet = null;
                    Matcher matcher = null;
                    try {
                        matcher = matchLoader.getMatcher(matcherName);
                        //The matcher itself should log that it's been inited.
                        if (getLogger().isInfoEnabled()) {
                            StringBuffer infoBuffer =

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                try {
                    MatcherConfigImpl configImpl = new MatcherConfigImpl();
                    configImpl.setMatcherName(matchName);
                    configImpl.setCondition(condition);
                    configImpl.setMailetContext(context);
                    Matcher matcher = (Matcher) mailetClassLoader.loadClass(className).newInstance();
                    matcher.init(configImpl);
                    return matcher;
                } catch (ClassNotFoundException cnfe) {
                    //do this so we loop through all the packages
                }
            }

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        Iterator<List<MatcherManagement>> mit = matchers.values().iterator();     
        while (mit.hasNext()) {
            List<MatcherManagement> mList = mit.next();
            for (int i = 0; i < mList.size(); i++) {
                Matcher m = mList.get(i);
                if (debugEnabled) {
                    logger.debug("Shutdown matcher " + m.getMatcherInfo());
                }
                m.destroy();
            }
           
        }      
    }

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            HierarchicalConfiguration c = compMatcherConfs.get(j);
            String compName = c.getString("[@name]", null);
            String matcherName = c.getString("[@match]", null);
            String invertedMatcherName = c.getString("[@notmatch]", null);


            Matcher matcher = null;
            if (matcherName != null && invertedMatcherName != null) {
                // if no matcher is configured throw an Exception
                throw new ConfigurationException("Please configure only match or nomatch per mailet");
            } else if (matcherName != null) {
                matcher = matcherLoader.getMatcher(matcherName);
                if (matcher instanceof CompositeMatcher) {
                    CompositeMatcher compMatcher = (CompositeMatcher) matcher;
                    
                    List<MatcherManagement> childMatcher = loadCompositeMatchers(processorName, compMap,c.configurationsAt("matcher"));
                    for (int i = 0 ; i < childMatcher.size(); i++) {
                        compMatcher.add(childMatcher.get(i));
                    }
                }
            } else if (invertedMatcherName != null) {
                Matcher m = matcherLoader.getMatcher(invertedMatcherName);
                if (m instanceof CompositeMatcher) {
                    CompositeMatcher compMatcher = (CompositeMatcher) m;
                    
                    List<MatcherManagement> childMatcher = loadCompositeMatchers(processorName, compMap,c.configurationsAt("matcher"));
                    for (int i = 0 ; i < childMatcher.size(); i++) {

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                    String mailetClassName = c.getString("[@class]");
                    String matcherName = c.getString("[@match]", null);
                    String invertedMatcherName = c.getString("[@notmatch]", null);
                
                    Mailet mailet = null;
                    Matcher matcher = null;
                    try {


                        if (matcherName != null && invertedMatcherName != null) {
                            // if no matcher is configured throw an Exception
                            throw new ConfigurationException("Please configure only match or nomatch per mailet");

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        int currentLevel = nestingLevel;
        int i = 0;


        while (matchers.hasNext()) {
            MatcherManagement matcherManagement;
            Matcher matcher = matchers.next();
            
            // check if the matcher is an instance of MatcherManagement. If not create a wrapper around it. This will give us not all
            // statistics but at least a few of them
            if (matcher instanceof MatcherManagement) {
               matcherManagement = (MatcherManagement) matcher;
            } else {
                matcherManagement = new MatcherManagement(matcher);
            }


            String matcherMBeanName = parentMBeanName + ",subtype" + currentLevel +"=matcher,index" + currentLevel+"=" + (i++) + ",matchername" + currentLevel+"=" + matcherManagement.getMatcherName();
            registerMBean(matcherMBeanName, matcherManagement);
            
            Matcher wrappedMatcher = getWrappedMatcher(matcherManagement);
            
            // Handle CompositeMatcher which were added by JAMES-948
            if (wrappedMatcher instanceof CompositeMatcher) {
                // we increment the nesting as we have one more child level and register the child matchers
                registerMatchers(matcherMBeanName, ((CompositeMatcher) wrappedMatcher).iterator(), ++nestingLevel);

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     * @return Collection of Recipient from the Or composition results of the
     *         child matchers.
     */
    public Collection match(Mail mail) throws MessagingException {
        Collection finalResult = null;
        Matcher matcher = null;
        boolean first = true;


        // the size of the complete set of recipients
        int size = mail.getRecipients().size();


        // Loop through until the finalResult is full or all the child matchers
        // have been executed
        for (Iterator matcherIter = iterator(); matcherIter.hasNext();) {
            matcher = (Matcher) matcherIter.next();
            // log("Matching with "
            // + matcher
            // .getMatcherConfig()
            // .getMatcherName()
            // );
            Collection result = matcher.match(mail);
            if (first) {
                if (result == null) {
                    result = new ArrayList(0);
                }
                finalResult = result;

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