root / src / gr / ebs / gss / server / BaseServlet.java @ 28be8c05
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1 | 978061e3 | Panagiotis Astithas | /*
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2 | 978061e3 | Panagiotis Astithas | * Copyright 2008, 2009, 2010 Electronic Business Systems Ltd.
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3 | 978061e3 | Panagiotis Astithas | *
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4 | 978061e3 | Panagiotis Astithas | * This file is part of GSS.
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5 | 978061e3 | Panagiotis Astithas | *
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6 | 978061e3 | Panagiotis Astithas | * GSS is free software: you can redistribute it and/or modify
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7 | 978061e3 | Panagiotis Astithas | * it under the terms of the GNU General Public License as published by
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8 | 978061e3 | Panagiotis Astithas | * the Free Software Foundation, either version 3 of the License, or
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9 | 978061e3 | Panagiotis Astithas | * (at your option) any later version.
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10 | 978061e3 | Panagiotis Astithas | *
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11 | 978061e3 | Panagiotis Astithas | * GSS is distributed in the hope that it will be useful,
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12 | 978061e3 | Panagiotis Astithas | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 978061e3 | Panagiotis Astithas | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | 978061e3 | Panagiotis Astithas | * GNU General Public License for more details.
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15 | 978061e3 | Panagiotis Astithas | *
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16 | 978061e3 | Panagiotis Astithas | * You should have received a copy of the GNU General Public License
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17 | 978061e3 | Panagiotis Astithas | * along with GSS. If not, see <http://www.gnu.org/licenses/>.
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18 | 978061e3 | Panagiotis Astithas | */
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19 | 978061e3 | Panagiotis Astithas | package gr.ebs.gss.server; |
20 | 978061e3 | Panagiotis Astithas | |
21 | 978061e3 | Panagiotis Astithas | import static gr.ebs.gss.server.configuration.GSSConfigurationFactory.getConfiguration; |
22 | 978061e3 | Panagiotis Astithas | import gr.ebs.gss.client.exceptions.RpcException; |
23 | 978061e3 | Panagiotis Astithas | import gr.ebs.gss.server.ejb.ExternalAPI; |
24 | 978061e3 | Panagiotis Astithas | |
25 | 978061e3 | Panagiotis Astithas | import java.io.UnsupportedEncodingException; |
26 | 978061e3 | Panagiotis Astithas | import java.net.URLEncoder; |
27 | 978061e3 | Panagiotis Astithas | import java.util.Formatter; |
28 | 978061e3 | Panagiotis Astithas | |
29 | 978061e3 | Panagiotis Astithas | import javax.naming.Context; |
30 | 978061e3 | Panagiotis Astithas | import javax.naming.InitialContext; |
31 | 978061e3 | Panagiotis Astithas | import javax.naming.NamingException; |
32 | 978061e3 | Panagiotis Astithas | import javax.rmi.PortableRemoteObject; |
33 | 978061e3 | Panagiotis Astithas | import javax.servlet.http.HttpServlet; |
34 | 978061e3 | Panagiotis Astithas | |
35 | 978061e3 | Panagiotis Astithas | import org.apache.commons.logging.Log; |
36 | 978061e3 | Panagiotis Astithas | import org.apache.commons.logging.LogFactory; |
37 | 978061e3 | Panagiotis Astithas | |
38 | 978061e3 | Panagiotis Astithas | /**
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39 | 978061e3 | Panagiotis Astithas | * The base servlet contains a collection of helper methods.
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40 | 978061e3 | Panagiotis Astithas | *
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41 | 978061e3 | Panagiotis Astithas | * @author past
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42 | 978061e3 | Panagiotis Astithas | */
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43 | 978061e3 | Panagiotis Astithas | public class BaseServlet extends HttpServlet { |
44 | 978061e3 | Panagiotis Astithas | /**
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45 | 978061e3 | Panagiotis Astithas | * The request parameter name for the GWT code server URL, used when
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46 | 978061e3 | Panagiotis Astithas | * debugging.
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47 | 978061e3 | Panagiotis Astithas | */
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48 | 978061e3 | Panagiotis Astithas | protected static final String GWT_SERVER_PARAM = "gwt.codesvr"; |
49 | 978061e3 | Panagiotis Astithas | |
50 | 978061e3 | Panagiotis Astithas | /**
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51 | 978061e3 | Panagiotis Astithas | * The serial version UID of the class.
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52 | 978061e3 | Panagiotis Astithas | */
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53 | 978061e3 | Panagiotis Astithas | private static final long serialVersionUID = 1L; |
54 | 978061e3 | Panagiotis Astithas | |
55 | 978061e3 | Panagiotis Astithas | /**
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56 | 978061e3 | Panagiotis Astithas | * The logger.
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57 | 978061e3 | Panagiotis Astithas | */
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58 | 978061e3 | Panagiotis Astithas | private static Log logger = LogFactory.getLog(BaseServlet.class); |
59 | 978061e3 | Panagiotis Astithas | |
60 | 978061e3 | Panagiotis Astithas | /**
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61 | 978061e3 | Panagiotis Astithas | * A helper method that retrieves a reference to the ExternalAPI bean and
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62 | 978061e3 | Panagiotis Astithas | * stores it for future use.
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63 | 978061e3 | Panagiotis Astithas | *
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64 | 978061e3 | Panagiotis Astithas | * @return an ExternalAPI instance
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65 | 978061e3 | Panagiotis Astithas | * @throws RpcException in case an error occurs
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66 | 978061e3 | Panagiotis Astithas | */
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67 | 978061e3 | Panagiotis Astithas | protected ExternalAPI getService() throws RpcException { |
68 | 978061e3 | Panagiotis Astithas | try {
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69 | 978061e3 | Panagiotis Astithas | final Context ctx = new InitialContext(); |
70 | 978061e3 | Panagiotis Astithas | final Object ref = ctx.lookup(getConfiguration().getString("externalApiPath")); |
71 | 978061e3 | Panagiotis Astithas | return (ExternalAPI) PortableRemoteObject.narrow(ref, ExternalAPI.class); |
72 | 978061e3 | Panagiotis Astithas | } catch (final NamingException e) { |
73 | 978061e3 | Panagiotis Astithas | logger.error("Unable to retrieve the ExternalAPI EJB", e);
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74 | 978061e3 | Panagiotis Astithas | throw new RpcException("An error occurred while contacting the naming service"); |
75 | 978061e3 | Panagiotis Astithas | } |
76 | 978061e3 | Panagiotis Astithas | } |
77 | 978061e3 | Panagiotis Astithas | |
78 | 978061e3 | Panagiotis Astithas | /**
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79 | 978061e3 | Panagiotis Astithas | * Return the name of the service.
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80 | 978061e3 | Panagiotis Astithas | */
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81 | 978061e3 | Panagiotis Astithas | protected String getServiceName() { |
82 | 978061e3 | Panagiotis Astithas | return getConfiguration().getString("serviceName", "GSS"); |
83 | 978061e3 | Panagiotis Astithas | } |
84 | 978061e3 | Panagiotis Astithas | |
85 | 978061e3 | Panagiotis Astithas | /**
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86 | 978061e3 | Panagiotis Astithas | * Decode the request attribute provided by the container to a UTF-8
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87 | 978061e3 | Panagiotis Astithas | * string, since GSS assumes all data to be encoded in UTF-8. The
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88 | 978061e3 | Panagiotis Astithas | * servlet container's encoding can be specified in gss.properties.
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89 | 978061e3 | Panagiotis Astithas | */
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90 | 978061e3 | Panagiotis Astithas | protected String decodeAttribute(Object attribute) throws UnsupportedEncodingException { |
91 | 978061e3 | Panagiotis Astithas | return new String(attribute.toString().getBytes(getConfiguration().getString("requestAttributeEncoding")), "UTF-8"); |
92 | 978061e3 | Panagiotis Astithas | } |
93 | 978061e3 | Panagiotis Astithas | |
94 | 978061e3 | Panagiotis Astithas | /**
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95 | 978061e3 | Panagiotis Astithas | * A helper method that converts a byte buffer to a printable list of
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96 | 978061e3 | Panagiotis Astithas | * hexadecimal numbers.
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97 | 978061e3 | Panagiotis Astithas | */
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98 | 978061e3 | Panagiotis Astithas | protected String getHexString(byte[] buffer) { |
99 | 978061e3 | Panagiotis Astithas | StringBuilder sb = new StringBuilder(); |
100 | 978061e3 | Panagiotis Astithas | Formatter formatter = new Formatter(sb); |
101 | 978061e3 | Panagiotis Astithas | for (int i=0; i<buffer.length; i++) |
102 | 978061e3 | Panagiotis Astithas | formatter.format("0x%x, ", buffer[i]);
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103 | 978061e3 | Panagiotis Astithas | return sb.toString();
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104 | 978061e3 | Panagiotis Astithas | } |
105 | 978061e3 | Panagiotis Astithas | |
106 | 978061e3 | Panagiotis Astithas | protected String encode(String parameter) throws UnsupportedEncodingException { |
107 | 978061e3 | Panagiotis Astithas | return URLEncoder.encode(parameter, "UTF-8"); |
108 | 978061e3 | Panagiotis Astithas | } |
109 | 978061e3 | Panagiotis Astithas | } |