JSF: Am I using ViewScoped correctly or is there memory leak?
Hi all.
I'm new to JSF and JBoss and maybe I'm doing something stupid.
I'm using jboss-as-7.1.1.Final.
I have created simple bean:
package test;
import java.io.Serializable;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
@ManagedBean
@ViewScoped
public class TestClass implements Serializable {
private String test = "test";
private byte[] b;
private static int initialize_count;
private static int destroy_count;
private static int finalize_count;
public TestClass() {
b = new byte[1024*1024*8];
}
@PostConstruct
public void initialize() {
System.out.println("initialize " + initialize_count++);
}
@PreDestroy
public void destroy() {
System.out.println("destroy " + destroy_count++);
}
@Override
protected void finalize() throws Throwable {
System.out.println("finalize " + finalize_count++);
super.finalize();
}
public String getTest() {
return test;
}
public void setTest(String test) {
this.test = test;
}
public void invalidateSession() {
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
externalContext.invalidateSession();
}
public String leaveScope() {
return "index.jsf";
}
}
and simple jsf page:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:c="http://java.sun.com/jsp/jstl/core">
<h:form>
<h:outputText value="#{testClass.test}" />
<h:commandButton action="#{testClass.invalidateSession}" value="Invalidate Session" />
<h:commandButton action="#{testClass.leaveScope}" value="Leave Scope" />
</h:form>
</html>
Then I reloaded index.jsf page for 45 times and got the exception:
02:44:58,266 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/deployment-portal].[FacesServlet]] (http-localhost-127.0.0.1-8080-1) Servlet.service() for servlet FacesServlet threw exception: java.lang.OutOfMemoryError: Java heap space at test.TestClass.<init>(TestClass.java:23) [classes:] at sun.reflect.GeneratedConstructorAccessor29.newInstance(Unknown Source) [:1.7.0_03] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [rt.jar:1.7.0_03] at java.lang.reflect.Constructor.newInstance(Constructor.java:525) [rt.jar:1.7.0_03] at java.lang.Class.newInstance0(Class.java:372) [rt.jar:1.7.0_03] at java.lang.Class.newInstance(Class.java:325) [rt.jar:1.7.0_03] at com.sun.faces.mgbean.BeanBuilder.newBeanInstance(BeanBuilder.java:188) [jsf-impl-2.1.7-jbossorg-2.jar:] at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:102) [jsf-impl-2.1.7-jbossorg-2.jar:] at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409) [jsf-impl-2.1.7-jbossorg-2.jar:] at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269) [jsf-impl-2.1.7-jbossorg-2.jar:] at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244) [jsf-impl-2.1.7-jbossorg-2.jar:] at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116) [jsf-impl-2.1.7-jbossorg-2.jar:] at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176) [jsf-impl-2.1.7-jbossorg-2.jar:] at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203) [jsf-impl-2.1.7-jbossorg-2.jar:] at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:72) [jbossweb-7.0.13.Final.jar:] at org.apache.el.parser.AstValue.getValue(AstValue.java:147) [jbossweb-7.0.13.Final.jar:] at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:189) [jbossweb-7.0.13.Final.jar:] at org.jboss.weld.el.WeldValueExpression.getValue(WeldValueExpression.java:50) [weld-core-1.1.5.AS71.Final.jar:2012-02-10 15:31] at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109) [jsf-impl-2.1.7-jbossorg-2.jar:] at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final] at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final] at javax.faces.component.UIOutput.getValue(UIOutput.java:169) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final] at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:205) [jsf-impl-2.1.7-jbossorg-2.jar:] at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:355) [jsf-impl-2.1.7-jbossorg-2.jar:] at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:164) [jsf-impl-2.1.7-jbossorg-2.jar:] at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final] at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1786) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final] at javax.faces.render.Renderer.encodeChildren(Renderer.java:168) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final] at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final] at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final] at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782) [jboss-jsf-api_2.1_spec-2.0.1.Final.jar:2.0.1.Final] at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:402) [jsf-impl-2.1.7-jbossorg-2.jar:]
Should that code works?
Thanks.
