Re: Mysterious EditingContext Swap
Re: Mysterious EditingContext Swap
- Subject: Re: Mysterious EditingContext Swap
- From: "Jerry W. Walker" <email@hidden>
- Date: Wed, 2 Aug 2006 08:14:54 -0400
Hi, Owen,
Though I'm not sure what's causing your error, it sounds like you
might be having a contention issue with your EOEditingContext. I
notice that you're not locking it until you're ready to saveChanges
on it.
When creating your own EOEditingContext (vs. using Sessions
defaultEditingContext), it should be locked before ANY use (including
such things as creating or obtaining EOs through it, updating EOs in
it, deleting EOs from it, etc.).
The best way I know of doing that is by using Jonathan Rochkind's
MultiECLockManager (or Chuck Hill's customization of it).
You can find it at:
http://www.wocode.com/WOCode/Files/MultiECLockManager.java
I can't see anything else in the code that would cause such a problem.
Regards,
Jerry
On Aug 1, 2006, at 11:50 PM, Owen McKerrow wrote:
Nope, not paraphrasing. You can see the full error message at
bottom of the email.
The only time I have heard of the active editing context is for a
save.
Nope haven't had the chnace yet to separate this out to its own
project.
Heres the full code ( it includes our RADIUS authentication methods
which I did paste before ):
// Generated by the WebObjects Assistant Mon Feb 07 14:26:32
Australia/Sydney 2005
import com.webobjects.foundation.*;
import com.webobjects.appserver.*;
import com.webobjects.eocontrol.*;
import com.webobjects.eoaccess.*;
import net.sourceforge.jradiusclient.*;
import net.sourceforge.jradiusclient.exception.*;
public class Main extends WOComponent {
protected Application app;
protected EOEditingContext ec;
protected NSMutableDictionary bindings;
protected String userName;
protected String password;
protected String errorMessage;
protected boolean forgotPassword;
protected boolean thankyou;
protected boolean emailAddress;
protected boolean gotMobile;
private String secretHandshake;
private String hostName;
private RadiusClient rc;
private String exitCode;
//----------------------------- The Constructors
---------------------------------------------
public Main( WOContext context ) throws Exception
{
super(context);
app = (Application)Application.application();
//ec = ((Session)session()).defaultEditingContext();
ec = new EOEditingContext();
System.out.println("Editing Context just been made : " + ec);
// ((Session)session()).resetCrumbs();
secretHandshake = "*********";
hostName = "radius.uow.edu.au";
RadiusClient rc = null;
NSArray mems;
forgotPassword = false;
thankyou = false;
emailAddress = false;
gotMobile = false;
}
//------------------------------- WOComponent Functions
---------------------------------------
//Called when the Persons clicks the submit button to login
public WOComponent checkLogin() throws Exception
{
errorMessage = "";
WOComponent nextPage = null;
//If both fields have some data in them
if ( userName != null && password != null )
{
userName.trim();
password.trim();
try {
rc = new RadiusClient(hostName,
1812,1813,secretHandshake,userName);
} catch(java.net.SocketException soex) {
app.setErrorMessage("Unable to create Radius Client due to
failure to create socket!");
throw soex;
} catch(java.security.NoSuchAlgorithmException nsaex) {
app.setErrorMessage("Unable to create Radius Client due to
failure to create MD5 MessageDigest!");
throw nsaex;
} catch(InvalidParameterException ivpex) {
app.setErrorMessage("Unable to create Radius Client due to
invalid parameter! " + ivpex.getMessage() );
throw ivpex;
}
try {
boolean returned;
if (app.debugMode )
{
returned = true;
}
else
{
returned = authenticate(rc,password,null);
}
// Radius confirmed the userName and password are valid
if (returned)
{
nextPage = (Menu)pageWithName("Menu");
//check if the user is in the recipient table
checkRecipient();
}
else
{
errorMessage = "<span class=\"failure\">User name & Password
incorrect</span>";
if (isUppercase(password)) {
errorMessage += "<span class=\"failure\"><br>Check Caps lock
is not on.</span>";
}
}
} catch(InvalidParameterException ivpex){
app.setErrorMessage(ivpex.getMessage());
} catch(java.net.UnknownHostException uhex){
app.setErrorMessage(uhex.getMessage());
} catch(java.io.IOException ioex){
app.setErrorMessage(ioex.getMessage());
} catch(RadiusException rex){
app.setErrorMessage(rex.getMessage());
}
}
else {
errorMessage = "<span class=\"failure\">Please enter
both user name & password.</span>";
}
password = "";
return nextPage;
}
//Authenticate against the RADIUS server
public static boolean authenticate(RadiusClient rc, String
userPass, byte[] callingStationId) throws
InvalidParameterException, java.net.UnknownHostException,
java.io.IOException, RadiusException
{
int returnCode;
returnCode = rc.authenticate(userPass);
boolean returned = false;
switch (returnCode){
case RadiusClient.ACCESS_ACCEPT:
System.out.println("Authenticated");
returned = true;
break;
case RadiusClient.ACCESS_REJECT:
System.out.println("Not Authenticated");
returned = false;
break;
case RadiusClient.ACCESS_CHALLENGE:
System.out.println(rc.getChallengeMessage());
break;
default:
System.out.println("How the hell did we get here?");
returned = false;
break;
}
return returned;
}
// Returns true is each character entered is in uppercase
private boolean isUppercase(String password)
{
boolean flag = true;
char[] temp = password.toCharArray();
char aChar;
for(int i = 0; i<password.length();i++)
{
aChar = temp[i];
if(Character.isLowerCase(aChar))
{
flag = false;
break;
}
}
return flag;
}
public void checkRecipient() throws Exception
{
System.out.println("Editing Context at start of checkRecipient :
" + ec);
try {
//search the recipient table for the username
Recipient r = null;
NSMutableDictionary dic = new NSMutableDictionary();
dic.setObjectForKey(userName,"logon");
NSArray temp =
EOUtilities.objectsWithFetchSpecificationAndBindings
(ec,"Recipient","RecipSearch",dic);
if( temp.count() > 0 ) {
r = (Recipient)temp.lastObject();
System.out.println("Old : " + r.surname() + r.logonIdentifier()
+ r.editingContext());
}
System.out.println("Editing after search for old : " + ec);
//insert new row in database if recipient does not exist
if (r==null) {
System.out.println("Editin Context at start of create : " + ec);
Company theCompany = (Company)
com.webobjects.eoaccess.EOUtilities.objectMatchingKeyAndValue
(ec,"Company","logonIdentifier","UOW");
System.out.println("Company : " + theCompany.editingContext());
if( theCompany != null ) {
r = ( Recipient)
com.webobjects.eoaccess.EOUtilities.createAndInsertInstance
(ec,"Recipient");
System.out.println("New Recipient : " + r.editingContext());
r.setLogonIdentifier(userName);
r.addObjectToBothSidesOfRelationshipWithKey
(theCompany,"company");
//Get their details from LDAP
//Should only be one entry returned for 1 username
//Use a new Editing Context as we us e a different Adaptor
type i.e. JNDI not JDBC, not sure if this is required but added in
case it was causing the bug
PersonLDAP person = (PersonLDAP)
EOUtilities.objectMatchingKeyAndValue(new EOEditingContext
(),"PersonLDAP","uid",userName);
r.setFirstName(person.givenName());
r.setSurname(person.sn());
r.setEmailAddress(userName + "@uow.edu.au");
r.setDateRegistered(new NSTimestamp());
//set the session user to the new instance of recipient
System.out.println("new : " + r.surname() + r.logonIdentifier
() + r.editingContext());
save();
}
}
System.out.println("editing Context : " + ec);
((Session)session()).setCurrentUser((Recipient)
EOUtilities.localInstanceOfObject(((Session)session
()).defaultEditingContext(),r));
}
catch (java.lang.IllegalArgumentException ex) {
}
catch (Exception e)
{
throw e;
}
}
private void save() throws Exception
{
try {
// ec.lock();
ec.saveChanges();
// ec.unlock();
} catch (Exception exception) {
app.setErrorMessage("Error when trying to add a new recipient.
save() menu.java\n");
throw exception;
}
}
}
Owen McKerrow
WebMaster, emlab
Ph : +61 02 4221 5517
http://emlab.uow.edu.au
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - -
'The test of a first-rate intelligence is the ability to hold two
opposed ideas in the mind at the same time and still be able to
function.'
-F.Scott Fitzgerald,
On 02/08/2006, at 1:09 PM, Ken Anderson wrote:
Owen,
Are you paraphrasing the error message? I have to admit, I've
never heard of a database context's "active" editing context. Is
there other code besides this? Have you isolated this code out in
a separate project?
Ken
On Aug 1, 2006, at 10:42 PM, Owen McKerrow wrote:
Hi All,
...
--
__ Jerry W. Walker,
WebObjects Developer/Instructor for High Performance Industrial
Strength Internet Enabled Systems
email@hidden
203 278-4085 office
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