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Hi again.
I hope this is the right newsgroup for this kind of question, but I couldn’t see any similar threads in Cocoon-User.
I have tried looking through several sources, but I couldn’t find some sort of HowTo for writing own components. I have tried creating one by having a look at the hsqldb Classes, but I can’t get the thing to work. Every time I add the attribute for a user-role in the cocoon.xconf file, but I always get a “java.lang.NullPointerException” in the /WEB-INF/cocoon.log.000001 file
Here the soure for my roles file :
<?xml version="1.0"?> <role-list> <role name="org.apache.cocoon.components.exist.Exist" shorthand="exist-server" default-class="org.apache.cocoon.components.exist.ExistImpl"/> </role-list>
And the config-part of my cocoon.xconf : ... <exist-server class="org.apache.cocoon.components.ExistImpl" pool-max="1" pool-min="1"> <parameter name="http-port" value="8010"/> <parameter name="rpc-port" value="8011"/> </exist-server> …
I have created two classes : 1. org.apache.cocoon.components.exist.Exist :
package org.apache.cocoon.components.exist; import org.apache.avalon.framework.component.Component; public interface Exist extends Component { String ROLE = "org.apache.cocoon.components.exist.Exist"; }
2. org.apache.cocoon.components.exist.ExistImpl :
package org.apache.cocoon.components.exist;
import org.apache.avalon.framework.activity.Startable; import org.apache.avalon.framework.context.Context; import org.apache.avalon.framework.context.ContextException; import org.apache.avalon.framework.context.Contextualizable; import org.apache.avalon.framework.logger.AbstractLoggable; import org.apache.avalon.framework.parameters.Parameters; import org.apache.avalon.framework.parameters.Parameterizable; import org.apache.avalon.framework.thread.ThreadSafe; import org.apache.cocoon.Constants;
import java.io.File; import java.io.IOException; import java.net.MalformedURLException; import java.sql.SQLException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.Statement; import java.util.Enumeration;
import org.exist.ServerBean;
/** * Überschrift: eXist XML-Datenbankerweitrung um Lokle Interfaces Beschreibung: * Copyright: Copyright (c) 2002 Organisation: C-Ware IT-Service * *@author Christofer Dutz *@created 14. Februar 2002 *@version 1.0 */
public class ExistImpl extends AbstractLoggable implements Exist, Parameterizable, Contextualizable, ThreadSafe, Runnable, Startable {
private ServerBean server = null;
/** * Initialize the ServerImpl. A few options can be used : * <UL> * <LI> http-port = port where the http-server is listening</LI> * <LI> rpc-port = port where the rpc-server is listening</LI> * </UL> * * *@param params Description of the Parameter */ public void parameterize(Parameters params) { if (this.getLogger().isDebugEnabled()) { this.getLogger().debug("Parameterize ServerImpl"); } this.server = ServerBean.getInstance(); this.server.setHttpPort(params.getParameterAsInteger("http-port", 0)); this.server.setRpcPort(params.getParameterAsInteger("rpc-port", 0)); if (this.getLogger().isDebugEnabled()) { this.getLogger().debug("Configure ServerImpl" + ((params.getParameterAsInteger("with http-port", 0) == 0) ? " http-port : " + params.getParameter("http-port", "0") : "") + ((params.getParameterAsInteger("with rpc-port", 0) == 0) ? " rpc-port : " + params.getParameter("rpc-port", "0") : "")); } }
/** * Contextualize this class * *@param context Description of the Parameter *@exception ContextException Description of the Exception */ public void contextualize(Context context) throws ContextException { org.apache.cocoon.environment.Context ctx = (org.apache.cocoon.environment.Context) context.get(Constants.CONTEXT_ENVIRONMENT_CONTEXT);
try { String dbPath = new File(ctx.getRealPath("/WEB-INF/xmldb")).getCanonicalPath(); this.server.setHome(dbPath); if (this.getLogger().isDebugEnabled()) { this.getLogger().debug("database is : " + dbPath); } } catch (MalformedURLException mue) { getLogger().error("MalformedURLException - Could not get database directory ", mue); } catch (IOException ioe) { this.getLogger().error("IOException - Could not get database directory ", ioe); } }
/** * Start the server */ public void start() { if (!this.server.isActive()) { this.server.startup(); } }
/** * Stop the server */ public void stop() { if (this.server.isActive()) { this.server.shutdown(); } }
/** * Main processing method for the ServerImpl object */ public void run() { if (!this.server.isActive()) { this.server.startup(); } } }
The result I get in the log-file is :
DEBUG (2002-02-15) 17:44.22:287 [cocoon ] (Unknown-URI) Unknown-thread/Cocoon: Root configuration: cocoon DEBUG (2002-02-15) 17:44.22:287 [cocoon ] (Unknown-URI) Unknown-thread/Cocoon: Configuration version: 2.0 DEBUG (2002-02-15) 17:44.22:297 [cocoon ] (Unknown-URI) Unknown-thread/DefaultComponentFactory: ComponentFactory creating new instance of org.apache.cocoon.components.parser.JaxpParser. DEBUG (2002-02-15) 17:44.22:297 [cocoon ] (Unknown-URI) Unknown-thread/JaxpParser: Looking up org.apache.cocoon.components.resolver.Resolver DEBUG (2002-02-15) 17:44.22:297 [cocoon ] (Unknown-URI) Unknown-thread/ExcaliburComponentManager: Could not find ComponentHandler, attempting to create one for role: org.apache.cocoon.components.resolver.Resolver DEBUG (2002-02-15) 17:44.22:297 [cocoon ] (Unknown-URI) Unknown-thread/JaxpParser: JaxpParser: Could not yet find org.apache.cocoon.components.resolver.Resolver ERROR (2002-02-15) 17:44.22:297 [cocoon ] (Unknown-URI) Unknown-thread/Cocoon: Could not configure Cocoon environment java.lang.NullPointerException at org.apache.cocoon.Cocoon.configure(Cocoon.java:341) at org.apache.cocoon.Cocoon.initialize(Cocoon.java:197) at org.apache.cocoon.servlet.CocoonServlet.createCocoon(CocoonServlet.java:864) at org.apache.cocoon.servlet.CocoonServlet.init(CocoonServlet.java:220) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:852) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3267) at org.apache.catalina.core.StandardContext.start(StandardContext.java:3384) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:785) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:454) at org.apache.catalina.core.StandardHost.install(StandardHost.java:712) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:599) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:777) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:463) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:155) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1131) at org.apache.catalina.core.StandardHost.start(StandardHost.java:612) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1123) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:307) at org.apache.catalina.core.StandardService.start(StandardService.java:388) at org.apache.catalina.core.StandardServer.start(StandardServer.java:505) at org.apache.catalina.startup.Catalina.start(Catalina.java:776) at org.apache.catalina.startup.Catalina.execute(Catalina.java:681) at org.apache.catalina.startup.Catalina.process(Catalina.java:179) at java.lang.reflect.Method.invoke(Native Method) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:243) DEBUG (2002-02-15) 17:44.22:297 [cocoon ] (Unknown-URI) Unknown-thread/DefaultComponentFactory: ComponentFactory decommissioning instance of org.apache.cocoon.components.parser.JaxpParser.
Have I missed configuring anything ? Or have I done something wrong ? I simply can’t get any usefull information from the log L
Plese help me ( or redirect me if this doesn’t belong here )
Thanx in advance, Christofer Dutz
Christofer Dutz C-Ware IT-Service Inh. Christofer Dutz Goethestr. 18 64372 Ober-Ramstadt www.c-ware.de
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