problems with refreshing view after entity change
Hello,
I am a seam beginner and after 3 weeks of evaluation I am totally impressed by it. Right now I am developing a test application and I came across a problem which seems very easy but I coudnt find any solution on the forum.
What I have is a view with a form which displays entity beans (the view file was generated by seam-gen and modified). In the form I have a link which is binded to a session bean action. In the session bean I change the currently displayed entity and than redirect back to the same view page.
And now the problem: althought the entity is correctly changed (which can be seen in the database) the change cannot be seen in the view after we are done with the session bean.
When I navigate to some other page and back to the view I can see changes so it has definately something do to with page refreshing.
Can anyone help?
And here is my code, if anyone is interested
entity bean Research.java:
@Entity
public class Research implements Serializable {
private static final long serialVersionUID = 7974073555607550091L;
private Long id;
private String name;
private Client client;
private String researcherDescription;
private String dataTableName;
private String description;
private boolean active;
private Date dateCreated;
private ResearchConfiguration researchConfiguration;
private String dataFileName;
private InputStream dataFileData;
public Research() {
researchConfiguration = new ResearchConfiguration();
this.dateCreated = new Date(System.currentTimeMillis());
}
@Id
@GeneratedValue
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Length(max = 20)
@Column(unique=true)
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@ManyToOne
public Client getClient() {
return client;
}
public void setClient(Client client) {
this.client = client;
}
public String getResearcherDescription() {
return researcherDescription;
}
public void setResearcherDescription(String researcherDescription) {
this.researcherDescription = researcherDescription;
}
@Column(unique=true)
public String getDataTableName() {
return dataTableName;
}
public void setDataTableName(String dataTableName) {
this.dataTableName = dataTableName;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
@NotNull
public boolean isActive() {
return active;
}
public void setActive(boolean active) {
this.active = active;
}
public Date getDateCreated() {
return dateCreated;
}
public void setDateCreated(Date dateCreated) {
this.dateCreated = dateCreated;
}
@OneToOne(cascade = CascadeType.ALL)
public ResearchConfiguration getResearchConfiguration() {
if (researchConfiguration == null) {
researchConfiguration = new ResearchConfiguration();
}
return researchConfiguration;
}
public void setResearchConfiguration(
ResearchConfiguration researchConfiguration) {
this.researchConfiguration = researchConfiguration;
}
public String getDataFileName() {
return dataFileName;
}
public void setDataFileName(String dataFileName) {
this.dataFileName = dataFileName;
}
@Transient
public InputStream getDataFileData() {
return dataFileData;
}
public void setDataFileData(InputStream dataFileData) {
this.dataFileData = dataFileData;
}
public boolean isDataFileSet(){
return dataFileName!=null;
}
public void setDataFileSet(boolean dataFileSet){
}
}
the session bean ResearchManagerBean.java:
@Stateful
@Name("researchManager")
public class ResearchManagerBean implements ResearchManager {
@Logger
private Log log;
@In
FacesMessages facesMessages;
@In(required = false) @Out
Research research;
@PersistenceContext
private EntityManager em;
@Destroy
@Remove
public void destroy() {
}
@Override
@Begin(join = true)
public String selectResearch(Research research) {
if (research == null){
log.info("Research object is null! Cannot select!");
return null;
}
else
research = em.merge(research);
return "research";
}
@Override
@End
public String removeData(Research research) {
if (research == null){
log.info("Research object is null! Cannot remove!");
return null;
}
else {
research = em.merge(research);
em.createNativeQuery("DROP TABLE `"+research.getDataTableName()+"`").executeUpdate();
log.info("Table "+research.getDataTableName()+" dropped");
log.info("Removing data from research!");
research.setDataFileData(null);
research.setDataFileName(null);
research.setDataFileSet(false);
research.setDataTableName(null);
facesMessages
.add("Data removed");
em.persist(research);
em.flush();
return "removed";
}
}
@End
public String addDataFile() {
if (research == null){
log.info("Research null! Something bad happened...");
return null;
}
else {
em.merge(research);
log
.info("New data set for #{research.name} : #{research.dataFileName}");
facesMessages
.add("New data set for #{research.name} : #{research.dataFileName}");
return "dataadded";
}
}
public Research getResearch() {
return research;
}
public void setResearch(Research research) {
this.research = research;
}
}
the view research.xhtml:
<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:s="http://jboss.com/products/seam/taglib"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:rich="http://richfaces.ajax4jsf.org/rich"
template="layout/template.xhtml">
<ui:define name="body">
<h:messages globalOnly="true" styleClass="message" />
<h:form id="researchForm">
<rich:panel>
<f:facet name="header">research</f:facet>
<s:decorate id="nameDecoration" template="layout/edit.xhtml">
<ui:define name="label">Name</ui:define>
<h:inputText id="name" required="true"
value="#{research.name}" />
</s:decorate>
<s:decorate id="clientDecoration" template="layout/edit.xhtml">
<ui:define name="label">Client:</ui:define>
<h:selectOneMenu value="#{research.client}"
required="true" id="client">
<s:selectItems value="#{clientList.resultList}" var="client"
label="#{client.name}" noSelectionLabel="Please Select..." />
<s:convertEntity />
</h:selectOneMenu>
</s:decorate>
<s:decorate id="descriptionDecoration" template="layout/edit.xhtml">
<ui:define name="label">Description:</ui:define>
<h:inputTextarea id="description" rows="5" cols="65"
value="#{research.description}" />
</s:decorate>
<s:decorate id="activeDecoration" template="layout/edit.xhtml">
<ui:define name="label">Is active:</ui:define>
<h:selectBooleanCheckbox id="active" required="true"
value="#{research.active}" />
</s:decorate>
<s:decorate id="researcherDescriptionDecoration"
template="layout/edit.xhtml">
<ui:define name="label">Researcher description:</ui:define>
<h:inputTextarea id="researcherDescription" rows="5" cols="65"
value="#{research.researcherDescription}" />
</s:decorate>
<s:decorate id="dataFileNameDecoration" template="layout/edit.xhtml">
<ui:define name="label">Used data file name:</ui:define>
<h:inputText id="dataFileName" immediate="true" enabled="false"
value="#{research.dataFileName}" disbled="true" readonly="true"/>
<h:commandLink id="addDataFile" value="Add data >>"
action="#{researchManager.selectResearch(research)}"
immediate="true" rendered="#{!research.dataFileSet}"/>
<h:commandLink id="removeDataFile" value="Remove data >>"
action="#{researchManager.removeData(research)}"
immediate="true" rendered="#{research.dataFileSet}" />
</s:decorate>
<div style="clear: both" />
</rich:panel>
<div class="actionButtons"><h:commandButton id="save"
value="Save" action="#{researchHome.persist}"
rendered="#{!researchHome.managed}" /> <h:commandButton id="update"
value="Save" action="#{researchHome.update}"
rendered="#{researchHome.managed}" /> <h:commandButton id="delete"
value="Delete" action="#{researchHome.remove}"
rendered="#{researchHome.managed}" /> <s:button propagation="end"
id="done" value="Done" view="/researchList.xhtml" /></div>
</h:form>
</ui:define>
</ui:composition>
and the pages.xml
<!DOCTYPE pages PUBLIC
"-//JBoss/Seam Pages Configuration DTD 1.2//EN"
"http://jboss.com/products/seam/pages-1.2.dtd">
<pages no-conversation-view-id="/home.xhtml"
login-view-id="/login.xhtml">
<page view-id="*">
<navigation>
<rule if-outcome="home">
<redirect view-id="/home.xhtml" />
</rule>
</navigation>
</page>
<page view-id="/addData.xhtml">
<navigation from-action="#{researchManager.addDataFile}">
<rule if-outcome="dataadded">
<end-conversation />
<redirect view-id="/research.xhtml">
<param name="researchId"
value="#{researchManager.research.id}" />
</redirect>
</rule>
</navigation>
</page>
<page view-id="/research.xhtml">
<navigation
from-action="#{researchManager.removeData(research)}">
<end-conversation />
<redirect view-id="/research.xhtml">
<param name="researchId"
value="#{researchManager.research.id}" />
</redirect>
</navigation>
<navigation
from-action="#{researchManager.selectResearch(research)}">
<redirect view-id="/addData.xhtml" />
</navigation>
</page>
<exception
class="org.jboss.seam.framework.EntityNotFoundException">
<redirect view-id="/error.xhtml">
<message>Not found</message>
</redirect>
</exception>
<exception class="javax.persistence.EntityNotFoundException">
<redirect view-id="/error.xhtml">
<message>Not found</message>
</redirect>
</exception>
<exception class="javax.persistence.OptimisticLockException">
<end-conversation />
<redirect view-id="/error.xhtml">
<message>
Another user changed the same data, please try again
</message>
</redirect>
</exception>
<exception class="org.jboss.seam.security.AuthorizationException">
<redirect>
<message>You don't have permission to do this</message>
</redirect>
</exception>
<exception class="org.jboss.seam.security.NotLoggedInException">
<redirect view-id="/login.xhtml">
<message>Please log in first</message>
</redirect>
</exception>
<exception>
<redirect view-id="/error.xhtml">
<message>Unexpected error, please try again</message>
</redirect>
</exception>
</pages>
best regards!
michal przadka
