[JBoss Seam] - Re: @Log and NullPointerException
by tazo
Now it complains about missing no-args constructor in LogImpl:
| java.io.InvalidClassException: org.jboss.seam.log.LogImpl; no valid constructor
| at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:455)
| at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:297)
| at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:531)
| at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1552)
| at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1466)
| at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1699)
| at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
| at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
| at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
| at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
| at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
| at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1908)
| at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1832)
| at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
| at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
| at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
| at java.util.HashMap.readObject(HashMap.java:1067)
| at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
| at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
| at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
| at java.lang.reflect.Method.invoke(Method.java:585)
| at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:946)
| at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1809)
| at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1719)
| at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
| at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1634)
| at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
| at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1634)
| at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
| at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
| at com.sun.faces.application.StateManagerImpl$TreeNode.readExternal(StateManagerImpl.java:671)
| at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1755)
| at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1717)
| at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
| at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1634)
| at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299)
| at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
| at com.sun.faces.renderkit.ResponseStateManagerImpl.getTreeStructureToRestore(ResponseStateManagerImpl.java:149)
| at javax.faces.render.ResponseStateManager.getState(ResponseStateManager.java:215)
| at com.sun.faces.application.StateManagerImpl.restoreTree(StateManagerImpl.java:552)
| at com.sun.faces.application.StateManagerImpl.restoreView(StateManagerImpl.java:90)
| at org.jboss.seam.jsf.SeamStateManager.restoreView(SeamStateManager.java:97)
| at com.sun.faces.application.ViewHandlerImpl.restoreView(ViewHandlerImpl.java:288)
| at org.jboss.seam.jsf.SeamViewHandler.restoreView(SeamViewHandler.java:127)
| at com.sun.facelets.FaceletViewHandler.restoreView(FaceletViewHandler.java:317)
| at com.sun.faces.lifecycle.RestoreViewPhase.execute(RestoreViewPhase.java:142)
| at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:248)
| at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
| at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:144)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.jboss.seam.servlet.SeamRedirectFilter.doFilter(SeamRedirectFilter.java:63)
| at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
| at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
| at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
| at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
| at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
| at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
| at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
| at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
| at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
| at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
| at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
| at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
| at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
| at java.lang.Thread.run(Thread.java:595)
|
Currently java serialization api totally ignores readObject methods of serialazable seam component itself and any of it fields type. Simple test case:
| package demo;
|
| import java.io.IOException;
| import java.io.ObjectInputStream;
| import java.io.Serializable;
|
| import org.jboss.seam.ScopeType;
| import org.jboss.seam.annotations.Logger;
| import org.jboss.seam.annotations.Name;
| import org.jboss.seam.annotations.Scope;
| import org.jboss.seam.log.Log;
|
| @SuppressWarnings("serial")
| @Name("transientTest")
| @Scope(ScopeType.PAGE)
| public class TransientTest implements Serializable {
|
| @Logger
| private Log log;
|
| private transient String message = "initial";
|
| public void testSeamLog() {
| log.error(message);
| }
|
| public void testTransientField() {
| message.equals("restored");
| }
|
| void readObject(ObjectInputStream ois) throws ClassNotFoundException,
| IOException {
| ois.defaultReadObject();
|
| message = "restored";
| }
|
| public String getMessage() {
| return message;
| }
| }
|
|
And test page:
| <?xml version="1.0" encoding="UTF-8" ?>
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
| <html xmlns="http://www.w3.org/1999/xhtml"
| xmlns:ui="http://java.sun.com/jsf/facelets"
| xmlns:h="http://java.sun.com/jsf/html"
| xmlns:f="http://java.sun.com/jsf/core">
|
| <body>
| <h:form>
| <h:outputText value="#{transientTest.message}" /><br />
| <h:commandButton action="#{transientTest.testSeamLog}" value="Test Seam Log" />
| <h:commandButton action="#{transientTest.testTransientField}" value="Test Transient Field" />
| </h:form>
| </body>
| </html>
|
|
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19Â years, 8Â months