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annotate src/org/eclipse/jetty/server/Handler.java @ 1036:b87f97f6418a

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author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 03 Nov 2016 21:42:41 -0600
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.server;
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20
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21 import java.io.IOException;
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22
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23 import javax.servlet.ServletException;
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24 import javax.servlet.http.HttpServletResponse;
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25
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26 import org.eclipse.jetty.server.handler.HandlerCollection;
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27 import org.eclipse.jetty.server.handler.HandlerWrapper;
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28 import org.eclipse.jetty.util.component.Destroyable;
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29 import org.eclipse.jetty.util.component.LifeCycle;
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30
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31 /* ------------------------------------------------------------ */
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32 /** A Jetty Server Handler.
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33 *
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34 * A Handler instance is required by a {@link Server} to handle incoming
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35 * HTTP requests. A Handler may: <ul>
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36 * <li>Completely generate the HTTP Response</li>
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37 * <li>Examine/modify the request and call another Handler (see {@link HandlerWrapper}).
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38 * <li>Pass the request to one or more other Handlers (see {@link HandlerCollection}).
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39 * </ul>
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40 *
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41 * Handlers are passed the servlet API request and response object, but are
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42 * not Servlets. The servlet container is implemented by handlers for
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43 * context, security, session and servlet that modify the request object
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44 * before passing it to the next stage of handling.
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45 *
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46 */
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47 public interface Handler extends LifeCycle, Destroyable
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48 {
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49 /* ------------------------------------------------------------ */
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50 /** Handle a request.
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51 * @param target The target of the request - either a URI or a name.
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52 * @param baseRequest The original unwrapped request object.
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53 * @param request The request either as the {@link Request}
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54 * object or a wrapper of that request. The {@link AbstractHttpConnection#getCurrentConnection()}
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55 * method can be used access the Request object if required.
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56 * @param response The response as the {@link Response}
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57 * object or a wrapper of that request. The {@link AbstractHttpConnection#getCurrentConnection()}
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58 * method can be used access the Response object if required.
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59 * @throws IOException
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60 * @throws ServletException
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61 */
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62 public void handle(String target, Request request, HttpServletResponse response)
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63 throws IOException, ServletException;
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64
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65 public void setServer(Server server);
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66 public Server getServer();
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67
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68 public void destroy();
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69
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70 }
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