[JBoss Seam] - EntityHome.persist() return NullPointerException
by terryb
When trying to persist record to database using EntityHome object from within Java code (not jsf), following error is thrown.
Caused by: java.lang.NullPointerException
at org.jboss.seam.framework.Home.createdMessage(Home.java:52)
at org.jboss.seam.framework.EntityHome.persist(EntityHome.java:51)
at au.edu.tisc.session.ActivityLogger.log(ActivityLogger.java:60)
at au.edu.tisc.session.Authenticator.authenticate(Authenticator.java:68)
Home.java:52 line is:
debug("created entity #0 #1", entityClass.getName(), id);
I believe error is due to 'id' being null, as debug from my code below show.
My Code:
public void log(OrgUser orgUser, String action, String actionDesc) {
OrgUserActivityLogHome orgUserActivityLogHome = new OrgUserActivityLogHome();
orgUserActivityLogHome.getInstance().setId("000001");
orgUserActivityLogHome.getInstance().setAction(action);
orgUserActivityLogHome.getInstance().setDescription(actionDesc);
orgUserActivityLogHome.getInstance().setOrgUser(orgUser);
orgUserActivityLogHome.getInstance().setLastUpateDate((new CurrentDatetime()).getCurrentDatetime());
System.out.println("orgUserActivityLogHome.getId(): " + (orgUserActivityLogHome.getId()==null ? "null" : (String) orgUserActivityLogHome.getId()));
orgUserActivityLogHome.persist();
}
System.out.println ==> message: orgUserActivityLogHome.getId(): null
I am not sure why Id is being null, since I am setting it in my code????
I am new to Seam. Please feel free to make other suggestions.
Thanks
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18 years, 10 months
[JBoss Seam] - Re: Downloading Files
by goku2
Put this action in some Seam component.
<s:link action="{someSeamComponent.download}" value="Download"/>
And the action in SomeSeamComponent
| public void download() {
| //Here you get the entity that has a byte array with the data
| SomeEntity entity = getEntityFromEntityManager();
|
|
| FacesContext facesContext = FacesContext.getCurrentInstance();
| HttpServletResponse response = (HttpServletResponse) facesContext
| .getExternalContext().getResponse();
| response.setContentType(entity.getContentType());
| //Asume a data property inside entity
| byte[] data = entity.getData();
| response.setContentLength(data.length);
| response.setHeader("Content-disposition", "inline; filename=\""
| + entity.getFileName() + "\"");
|
| try {
|
| OutputStream out = response.getOutputStream();
|
| out.write(data);
|
| out.flush();
| out.close();
|
| facesContext.responseComplete();
| } catch (IOException ex) {
| FacesMessages.instance().add(
| "Error while downloading the file: " + entity.getFileName());
| }
|
| }
|
|
Cheers
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18 years, 10 months