Source Code Cross Referenced for PlexusObjectFactory.java in  » J2EE » webwork-2.2.6 » com » opensymphony » webwork » plexus » Java Source Code / Java DocumentationJava Source Code and Java Documentation

01:        package com.opensymphony.webwork.plexus;
02:
03:        import com.opensymphony.webwork.util.ObjectFactoryInitializable;
04:        import com.opensymphony.xwork.ObjectFactory;
05:        import org.apache.commons.logging.Log;
06:        import org.apache.commons.logging.LogFactory;
07:        import org.codehaus.plexus.PlexusContainer;
08:
09:        import javax.servlet.ServletContext;
10:        import java.util.Map;
11:
12:        /**
13:         * Plexus integartion. You need three optional files: plexus-request.xml, plexus-session.xml, and
14:         * plexus-application.xml.
15:         *
16:         * The syntax of these files is:
17:         *
18:         * <pre>
19:         * &lt;plexus&gt;
20:         * &lt;components&gt;
21:         *  &lt;component&gt;
22:         *      &lt;role&gt;com.acme.MyBean&lt;/role&gt;
23:         *      &lt;implementation&gt;com.acme.MyBean|com.acme.MyBeanImpl&lt;/implementation&gt;
24:         *      &lt;componentComposer&gt;field|setter|?&lt;/componentComposer&gt;
25:         *      &lt;requirements&gt;
26:         *          &lt;requirement&gt;
27:         *              &lt;role&gt;com.acme.MyOtherBean&lt;/role&gt;
28:         *          &lt;/requirement&gt;
29:         *      &lt;/requirements&gt;
30:         *      &lt;configuration&gt;
31:         *          &lt;foo&gt;123&lt;/foo&gt;
32:         *          &lt;bar&gt;hello, world&lt;/bar&gt;
33:         *      &lt;/configuration&gt;
34:         *      &lt;/component&gt;
35:         *  &lt;/components&gt;
36:         * &lt;/plexus&gt;
37:         * </pre>
38:         */
39:        public class PlexusObjectFactory extends ObjectFactory implements 
40:                ObjectFactoryInitializable {
41:            private static final Log log = LogFactory
42:                    .getLog(PlexusObjectFactory.class);
43:
44:            private PlexusContainer base;
45:
46:            public void init(ServletContext servletContext) {
47:                if (!PlexusLifecycleListener.loaded || !PlexusFilter.loaded) {
48:                    // uh oh! looks like the lifecycle listener wasn't installed. Let's inform the user
49:                    String message = "********** FATAL ERROR STARTING UP PLEXUS-WEBWORK INTEGRATION **********\n"
50:                            + "Looks like the Plexus listener was not configured for your web app! \n"
51:                            + "You need to add the following to web.xml: \n"
52:                            + "\n"
53:                            + "    <!-- this should be before the webwork filter -->\n"
54:                            + "    <filter>\n"
55:                            + "        <filter-name>plexus</filter-name>\n"
56:                            + "        <filter-class>com.opensymphony.webwork.plexus.PlexusFilter</filter-class>\n"
57:                            + "    </filter>\n"
58:                            + "\n"
59:                            + "...\n"
60:                            + "\n"
61:                            + "    <!-- this should be before the webwork filter -->\n"
62:                            + "    <filter-mapping>\n"
63:                            + "        <filter-name>plexus</filter-name>\n"
64:                            + "        <url-pattern>/*</url-pattern>\n"
65:                            + "    </filter-mapping>\n"
66:                            + "\n"
67:                            + "...\n"
68:                            + "\n"
69:                            + "    <listener>\n"
70:                            + "        <listener-class>com.opensymphony.webwork.plexus.PlexusLifecycleListener</listener-class>\n"
71:                            + "    </listener>";
72:                    log.fatal(message);
73:                    return;
74:                }
75:
76:                base = (PlexusContainer) servletContext
77:                        .getAttribute(PlexusLifecycleListener.KEY);
78:            }
79:
80:            public Object buildBean(String className, Map extraContext)
81:                    throws Exception {
82:                PlexusContainer pc = PlexusThreadLocal.getPlexusContainer();
83:                if (pc == null) {
84:                    pc = base;
85:                }
86:
87:                try {
88:                    return pc.lookup(className);
89:                } catch (Exception e) {
90:                    Object o = super.buildBean(className, extraContext);
91:                    pc.autowire(o);
92:                    return o;
93:                }
94:            }
95:        }