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package org.apache.camel.component.mail; |
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import javax.mail.Flags; |
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import javax.mail.Folder; |
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import javax.mail.Message; |
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import javax.mail.MessagingException; |
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import javax.mail.event.MessageCountEvent; |
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import javax.mail.event.MessageCountListener; |
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import org.apache.camel.Processor; |
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import org.apache.camel.impl.ScheduledPollConsumer; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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public class MailConsumer extends ScheduledPollConsumer<MailExchange> implements MessageCountListener { |
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private static final transient Log LOG = LogFactory.getLog(MailConsumer.class); |
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private final MailEndpoint endpoint; |
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private final Folder folder; |
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public MailConsumer(MailEndpoint endpoint, Processor processor, Folder folder) { |
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super(endpoint, processor); |
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this.endpoint = endpoint; |
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this.folder = folder; |
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} |
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@Override |
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protected void doStart() throws Exception { |
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super.doStart(); |
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ensureFolderIsOpen(); |
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folder.addMessageCountListener(this); |
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} |
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@Override |
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protected void doStop() throws Exception { |
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folder.removeMessageCountListener(this); |
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folder.close(true); |
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super.doStop(); |
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} |
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public void messagesAdded(MessageCountEvent event) { |
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Message[] messages = event.getMessages(); |
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for (Message message : messages) { |
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try { |
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if (!message.getFlags().contains(Flags.Flag.DELETED)) { |
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processMessage(message); |
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flagMessageDeleted(message); |
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} |
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} catch (MessagingException e) { |
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handleException(e); |
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} |
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} |
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} |
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public void messagesRemoved(MessageCountEvent event) { |
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Message[] messages = event.getMessages(); |
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for (Message message : messages) { |
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if (LOG.isDebugEnabled()) { |
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try { |
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LOG.debug("Removing message: " + message.getSubject()); |
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} catch (MessagingException e) { |
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LOG.debug("Ignored: " + e); |
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} |
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} |
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} |
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} |
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protected void poll() throws Exception { |
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ensureFolderIsOpen(); |
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int count = folder.getMessageCount(); |
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if (count > 0) { |
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Message[] messages = folder.getMessages(); |
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MessageCountEvent event = new MessageCountEvent(folder, MessageCountEvent.ADDED, true, messages); |
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messagesAdded(event); |
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} else if (count == -1) { |
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throw new MessagingException("Folder: " + folder.getFullName() + " is closed"); |
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} |
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folder.close(true); |
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} |
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protected void processMessage(Message message) { |
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try { |
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MailExchange exchange = endpoint.createExchange(message); |
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getProcessor().process(exchange); |
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} catch (Throwable e) { |
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handleException(e); |
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} |
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} |
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protected void ensureFolderIsOpen() throws MessagingException { |
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if (!folder.isOpen()) { |
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folder.open(Folder.READ_WRITE); |
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} |
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} |
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protected void flagMessageDeleted(Message message) throws MessagingException { |
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if (endpoint.getConfiguration().isDeleteProcessedMessages()) { |
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message.setFlag(Flags.Flag.DELETED, true); |
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} else { |
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message.setFlag(Flags.Flag.SEEN, true); |
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} |
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} |
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} |