jamesmailetloader.java

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package org.apache.james.transport;
import javax.mail.MessagingException;

import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.james.core.MailetConfigImpl;
import org.apache.james.services.MailetLoader;
import org.apache.mailet.Mailet;
import org.apache.mailet.MailetException;
/**
 * Loads Mailets for use inside James.
 *
 */
public class JamesMailetLoader extends Loader implements MailetLoader {
    /**
     * @see org.apache.avalon.framework.configuration.Configurable#configure(Configuration)
     */
    public void configure(Configuration conf) throws ConfigurationException {
        getPackages(conf,MAILET_PACKAGE);
    }

    /**
     * @see org.apache.james.services.MailetLoader#getMailet(java.lang.String, org.apache.avalon.framework.configuration.Configuration)
     */
    public Mailet getMailet(String mailetName, Configuration configuration)
        throws MessagingException {
        try {
            for (int i = 0; i < packages.size(); i++) {
                String className = (String) packages.elementAt(i) + mailetName;
                try {
                    MailetConfigImpl configImpl = new MailetConfigImpl();
                    configImpl.setMailetName(mailetName);
                    configImpl.setConfiguration(configuration);
                    configImpl.setMailetContext(mailetContext);
                    Mailet mailet = (Mailet) Thread.currentThread().getContextClassLoader().loadClass(className).newInstance();
                    mailet.init(configImpl);
                    return mailet;
                } catch (ClassNotFoundException cnfe) {
                    //do this so we loop through all the packages
                }
            }
            StringBuffer exceptionBuffer =
                new StringBuffer(128)
                    .append("Requested mailet not found: ")
                    .append(mailetName)
                    .append(".  looked in ")
                    .append(packages.toString());
            throw new ClassNotFoundException(exceptionBuffer.toString());
        } catch (MessagingException me) {
            throw me;
        } catch (Exception e) {
            StringBuffer exceptionBuffer =
                new StringBuffer(128).append("Could not load mailet (").append(mailetName).append(
                    ")");
            throw new MailetException(exceptionBuffer.toString(), e);
        }
    }
}