Doubt in makePersistentAll(Collection pcs) method

When a collection is given to a Persistence Manager to persistent, what
is the order in which the objects from this collection are picked up for
persistence. I have 2 objects to be persisted - A warehouse and a district
objects. There is a 1-M relationship between Warehouse and District. The
warehouse shld be added first and then the district as the district
account has a reference to the warehouse. When i add both the objects to
the collection, it always gives me a error sayin no warehouse record
found. Ive tried with both keepin the warehouse as the first or the last
record in the collection.
Can this problem be occuring becuz the warehouse record has not been
committed to the database yet. I cannot make makePersistent() call for
each objects as i have hundreds of objects to be persisteted.
Please advise.
Amol.

[email protected] (Amol) writes:
When a collection is given to a Persistence Manager to persistent, what
is the order in which the objects from this collection are picked up for
persistence. I have 2 objects to be persisted - A warehouse and a district
objects. There is a 1-M relationship between Warehouse and District. The
warehouse shld be added first and then the district as the district
account has a reference to the warehouse. When i add both the objects to
the collection, it always gives me a error sayin no warehouse record
found. Ive tried with both keepin the warehouse as the first or the last
record in the collection.Amol,
Could you please post the exception that you are seeing? Also, what
version of Kodo JDO are you using?
As of version 2.2.3, the behavior is as follows: makePersistentAll()
obtains an iterator from the collection passed into the method call, and
loops over that collection in order invoking makePersistent() on each.
The objects are queued for flushing to the data store in the order in
which they were first added to the current transaction. During commit,
PersistenceCapable objects reachable from the objects in the list of
objects made persistent will be made persistent themselves if they are
not already persistent.
Note that we may change this behavior slightly once the final
specification is released, if doing so will facilitate our compliance
with the final spec. In particular, our 1.0-compliant version may add a
reachable object to the transaction when its owning object is made
persistent. This would preserve the ordering as defined in the list
passed to makePersistentAll(), with two exceptions:
     - an object that appears late in the list but is reachable from
     an object early in the list may end up being persisted just
     after the object from which it is reachable, rather than in its
     position in the list (current behavior).
     - an object that is not in the list passed to makePersistentAll()
     but is reachable from an object in the list may be persistent just
     after the object from which it is reachable, rather than at the
     end of the list (current behavior).
Finally, what is the underlying implementation of the collection that
you are passing to makePersistentAll()? If the collection implementation
that you are using is not ordered, then all bets are off.
-Patrick
Patrick Linskey [email protected]
SolarMetric Inc. http://www.solarmetric.com

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[Recommend and review web sites|http://homepage.kgbinternet.com] - a fresh approach of building an open source, useful, and dynamic web site directory
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private static void checkActionType(String action) {
if (action.startsWith(" a")) {
++totalAddedActions;
} else if (action.startsWith(" c")) {
++totalChangedFolders;
} else if (action.startsWith(" p")) {
++totalPersonalizedActions;
} else if (action.startsWith(" r")) {
++totalRemovedActions;
} else if (action.startsWith(" v")) {
++totalViewedActions;
} else if (action.startsWith(" u")) {
++totalUpdateActions;
to use it, i need to declare my int variables static, because im calling this method from another static method that is called by main method.
but this can cause me problems ?
if i have two instances of this class running, my statics int will show the right value?
there is a better approach?

Here is my class, i want some advices to know if i am doing right, because everything is a little new for me.
My class, read a log file and based upon a regular expression, it can retrieve a general statistic or a personal statistic.
package br.com.organox.aggregator;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.Vector;
import org.apache.oro.text.regex.*;
public class LogFileReader {
private static Pattern regexpPattern;
private static PatternMatcher patternMatcher;
private static PatternCompiler patternCompiler;
private static PatternMatcherInput patternInput;
private static MatchResult matchResult;
private static final String patternString = "^[^\']+User\\s+\'([^\']+)\'[^\']+session\\s+\'([^\']+)\'\\s+(\\S+)";
// Integers used to store number of user, sessions and specific actions
private static int totalUsers;
private static int totalSessions;
private static int totalAddedActions;
private static int totalChangedFolders;
private static int totalPersonalizedActions;
private static int totalRemovedActions;
private static int totalUpdateActions;
private static int totalViewedActions;
public static void main(String[] args) {
if (args.length == 0) {
System.out.println("No file name was specified");
printClassUsage();
} else if (args.length == 1) {
printGeneralData(args[0]);
} else if (args.length == 2) {
System.out.println("You must set file name, data value and data type in order to " +
"this class run properly");
printClassUsage();
} else {
printSelectedData(args[0],args[1],args[2]);
public static void printGeneralData(String fileName) {
String data = "";
//Users and the Session Vector are used to avoid count repeated values.
Vector usersVector = new Vector();
Vector sessionVector = new Vector();
patternCompiler = new Perl5Compiler();
patternMatcher = new Perl5Matcher();
try {
regexpPattern = patternCompiler.compile(patternString);
} catch (MalformedPatternException mpe) {
System.out.println("Error Compiling Pattern");
System.out.println(mpe.getMessage());
try {
FileReader fileRead = new FileReader(fileName);
BufferedReader buffRead = new BufferedReader(fileRead);
while ((data = buffRead.readLine())!= null) {
patternInput = new PatternMatcherInput(data);
while(patternMatcher.contains(patternInput,regexpPattern)) {
matchResult = patternMatcher.getMatch();
// Avoid to insert repeated data in user and session Vectors
if (usersVector.lastIndexOf(matchResult.group(1)) == -1) {
usersVector.add(matchResult.group(1));
if (sessionVector.lastIndexOf(matchResult.group(2)) == -1) {
sessionVector.add(matchResult.group(2));
increaseActionType(matchResult.group(3));
for (int i=0;i<usersVector.size();i++) {
totalUsers++;
for (int i=0;i<sessionVector.size();i++) {
totalSessions++;
fileRead.close();
buffRead.close();
} catch (IOException ioe) {
System.out.println("An I/O error occurred while getting log file data");
ioe.printStackTrace();
System.out.println("Users logged : " + totalUsers);
System.out.println("Sessions opened : " + totalSessions);
System.out.println("Added contents : " + totalAddedActions);
System.out.println("Changed folders : " + totalChangedFolders);
System.out.println("Personalized contents : " + totalPersonalizedActions);
System.out.println("Removed contents : " + totalRemovedActions);
System.out.println("Viewed Contents : " + totalViewedActions);
System.out.println("Updated contents : " + totalUpdateActions);
public static void printSelectedData(String fileName,String value,String valueType) {
String data = "";
String user = "";
//Flag used to print the right result on screen
String printFlag = "";
Vector sessionVector = new Vector();
Vector userVector = new Vector();
Vector actionVector = new Vector();
patternCompiler = new Perl5Compiler();
patternMatcher = new Perl5Matcher();
try {
regexpPattern = patternCompiler.compile(patternString);
} catch (MalformedPatternException mpe) {
System.out.println("Error Compiling Pattern");
System.out.println(mpe.getMessage());
try {
FileReader fileRead = new FileReader(fileName);
BufferedReader buffRead = new BufferedReader(fileRead);
while ((data = buffRead.readLine())!= null) {
patternInput = new PatternMatcherInput(data);
while(patternMatcher.contains(patternInput,regexpPattern)) {
matchResult = patternMatcher.getMatch();
if (valueType.equalsIgnoreCase("-user")) {
printFlag = "userPrint";
if ((matchResult.group(1).equalsIgnoreCase(value))) {
userVector.add(matchResult.group(1));
// avoid insert a repeated value inside session vector.
if (sessionVector.lastIndexOf(matchResult.group(2)) == -1) {
sessionVector.add(matchResult.group(2));
increaseActionType(matchResult.group(3));
if (userVector.size() == 0) {
printFlag = "userPrintError";
} else if (valueType.equalsIgnoreCase("-session")) {
printFlag = "sessionPrint";
if ((matchResult.group(2).equalsIgnoreCase(value))) {
user = matchResult.group(1);
sessionVector.add(matchResult.group(2));
increaseActionType(matchResult.group(3));
if (sessionVector.size() == 0) {
printFlag = "sessionPrintError";
} else if (valueType.equalsIgnoreCase("-action")) {
printFlag = "actionPrint";
if ((matchResult.group(3).equalsIgnoreCase(value))) {
if (userVector.lastIndexOf(matchResult.group(1)) == -1) {
userVector.add(matchResult.group(1));
actionVector.add(matchResult.group(3));
if (actionVector.size() == 0) {
printFlag = "actionPrintError";
fileRead.close();
buffRead.close();
} catch (IOException ioe) {
System.out.println("An I/O error occurred while getting log file data");
ioe.printStackTrace();
if (printFlag.equals("userPrint")) {
for (int i=0;i<sessionVector.size();i++) {
totalSessions++;
System.out.println("Sessions opened by user " + value + " : " + totalSessions);
System.out.println("Added contents by user " + value + " : " + totalAddedActions);
System.out.println("Changed folders by user " + value + " : " + totalChangedFolders);
System.out.println("Personalized contents by user " + value + " : " + totalPersonalizedActions);
System.out.println("Removed contents by user " + value + " : " + totalRemovedActions);
System.out.println("Viewed contents by user " + value + " : " + totalViewedActions);
System.out.println("Updated contents by user " + value + " : " + totalUpdateActions);
} else if (printFlag.equals("userPrintError")) {
System.out.println("This user " + value + " was not found on log file");
} else if (printFlag.equals("sessionPrint")){
System.out.println("Session " + value + " was opened by user " + user);
System.out.println("Added contents by session " + value + " : " + totalAddedActions);
System.out.println("Changed folders by session " + value + " : " + totalChangedFolders);
System.out.println("Personalized contents by session " + value + " : " + totalPersonalizedActions);
System.out.println("Removed contents by session " + value + " : " + totalRemovedActions);
System.out.println("Viewed Contents by session " + value + " : " + totalViewedActions);
System.out.println("Updated contents by session " + value + " : " + totalUpdateActions);
} else if (printFlag.equals("sessionPrintError")){
System.out.println("This session " + value + " was not found on log file");
} else if (printFlag.equals("actionPrint")){
System.out.println("Action " + value + " was performed " + actionVector.size() +
" times for " + userVector.size() + " different user(s)");
} else if (printFlag.equals("actionPrintError")){
System.out.println("This action " + value + " was not found on log file");
} else {
System.out.println("Wrong search type!");
System.out.println("Accepted types are: ");
System.out.println("-user -> Search for a specified user");
System.out.println("-session -> Search for a specified session");
System.out.println("-action -> Search for a specified action");
private static void increaseActionType(String action) {
if (action.startsWith("a")) {
++totalAddedActions;
} else if (action.startsWith("c")) {
++totalChangedFolders;
} else if (action.startsWith("p")) {
++totalPersonalizedActions;
} else if (action.startsWith("r")) {
++totalRemovedActions;
} else if (action.startsWith("v")) {
++totalViewedActions;
} else if (action.startsWith("u")) {
++totalUpdateActions;
}

Doubt in a custom method in a custom BO

Hi All,
           I have a doubt in one of the methods I am writing in a custom BO.In the meethod I have written certain select statements and after fetching some data and calculation I am also updating some custom tables too.
No what I am confused about is whether this method will work as i am basically writing ABAP in it. Also i have 3 export parameters but am not sure what will be their use as I am just updating saome tables in the method. So what exactly is the o/p? At the time of declaration i declared them with a view that I might use the output of the method but am not sure now?
Please guide me on my approach.
Thanks in advance,
Saket.

Hi Saket,
   1) a method works like normal Funciton module with import & export parameters.
   2) Tasks will be created using theses methods which in turn will be used in the workflow as one of the step.
   3) The import parameters are passed from WF container to Task container and then to method container.
   4) Then the method will do whatever it is intended to do like wht u hav specified to update som tables. If required u can export some values from the method which again will follow the path to Task -> WF container.
   5) The values can be used as input for the next or other steps in the WF.
So it is not necessary that u should always export some values from the method. If u feel that the export parameters are not needed u can delete themand adjust the code accordingly.
Regards,
Sivagami

Doubt in makePersistentAll(Collection pcs) method

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