Valid Use of a Collection in SCCM

I've read the contents of this post with much interest and would like to ask about whether my particular requirement is possible.
When we build a server for the first time we need to ensure that it is not placed in collection with other production servers for obvious reasons. So I was thinking about creating a provisional collection
container where we can place newly built servers pending the QA of the build. The container will resemble the Production Collection in every respect except who has permissions to perform maintenance tasks on the objects in the collection. So if there is an
issue with the build and we need to delete the object or reset its maintenance flag, we don't risk inadvertently doing this to a normally functioning production server. That way we can also restrict who has the authority to maintain the collection to the build
teams. Only when the server is fully functioning and provisioned in AD and formally handed to the run teams, will it be moved to the Production Collection.
Is this a valid way to use Collections? If so is there any existing SCCM Task Sequence tool that will move servers between containers or do we need to develop one?
Many thanks....

Hi,
It sounds like a valid use of Collections. There is no builtin tool to move a device from a collection to another, you could check out the Right Click tools for SCCM 2007 and see if there is one or, simply change one of the right click tools script to have
that feature.
Regards,
Jörgen
-- My System Center blog ccmexec.com -- Twitter
@ccmexec

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Uninstall deployment for an AppV5 application with Connection group fails if using a User Collection but works on Machine Collections.

Hi,
I'm having troubles to understand why my application in AppV5 that was sequenced with "MS. AppV Sequencer SP1" is somehow failing to be uninstalled properly only if this on is deployed with a
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Remove-AppvClientPackage : Operation failed because package belongs to a
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Operation attempted: Remove AppV Package.
AppV Error Code: 020000050C.
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Virtualization\Client\Appv ...
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I know that SCCM 2012 does not uninstalls application prerequisites unless they are targeted by their individual uninstall collection or script an uninstall procedure on the main application. But if I try using the Machine collection the error is not appearing
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Will really appreciate your comments.
Kind Regards.
Joel E.G.

Hi Paul,
To be honest we already experienced many troubles after the SCCM console was migrated from R1 to R2, SCCM client was updated too in consequence, but our AppV5 client still remains on SP1.
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Not able to run validation using validation.xml & validator-rules.xml

Hello Friends,
I am not able to run validation using validation.xml & validator-rules.xml.
Entire code in running prefectly but no error messages are prompted.
Following is my code:
File Name : struts-config.xml
<struts-config>

<form-beans>
<form-bean name="searchForm"
type="com.solversa.SearchForm"/>
</form-beans>

<global-forwards>
<forward name="search" path="/search.jsp"/>
</global-forwards>

<action-mappings>
<action path="/search"
type="com.solversa.SearchAction"
name="searchForm"
scope="request"
validate="true"
input="/search.jsp">
</action>
</action-mappings>

<message-resources
parameter="ApplicationResources"/>

<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property property="pathnames"
value="/WEB-INF/validator-rules.xml,
/WEB-INF/validation.xml"/>
</plug-in>
</struts-config>
<br> File Name : <b> validation.xml </b>
<form-validation>
<formset>
<form name="searchForm">
<field property="name" depends="minlength">
<arg key="label.search.name" position = "0"/>
<arg1 name="minlength" key="${var:minlength}" resource="false"/>
<var>
<var-name>minlength</var-name>
<var-value>5</var-value>
</var>
</field>
<field property="ssNum" depends="mask">
<arg0 key="label.search.ssNum"/>
<var>
<var-name>mask</var-name>
<var-value>^\d{3}-\d{2}-\d{4}$</var-value>
</var>
</field>
</form>
</formset>
</form-validation>
<br> File Name : <b> SearchForm.java </b>
package com.jamesholmes.minihr;
import java.util.List;
import org.apache.struts.validator.ValidatorForm;
public class SearchForm extends ValidatorForm
private String name = null;
private String ssNum = null;
private List results = null;
public void setName(String name) {
this.name = name;
public String getName() {
return name;
public void setSsNum(String ssNum) {
this.ssNum = ssNum;
public String getSsNum() {
return ssNum;
public void setResults(List results) {
this.results = results;
public List getResults() {
return results;
<br> File Name : <b> SearchAction.java </b>
package com.jamesholmes.minihr;
import java.util.ArrayList;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public final class SearchAction extends Action
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception
EmployeeSearchService service = new EmployeeSearchService();
ArrayList results;
SearchForm searchForm = (SearchForm) form;
// Perform employee search based on what criteria was entered.
String name = searchForm.getName();
if (name != null && name.trim().length() > 0) {
results = service.searchByName(name);
} else {
results = service.searchBySsNum(searchForm.getSsNum().trim());
// Place search results in SearchForm for access by JSP.
searchForm.setResults(results);
// Forward control to this Action's input page.
return mapping.getInputForward();
<br> File Name : <b> EmployeeSearchService.java </b>
package com.jamesholmes.minihr;
import java.util.ArrayList;
public class EmployeeSearchService
/* Hard-coded sample data. Normally this would come from a real data
source such as a database. */
private static Employee[] employees =
new Employee("Bob Davidson", "123-45-6789"),
new Employee("Mary Williams", "987-65-4321"),
new Employee("Jim Smith", "111-11-1111"),
new Employee("Beverly Harris", "222-22-2222"),
new Employee("Thomas Frank", "333-33-3333"),
new Employee("Jim Davidson", "444-44-4444")
// Search for employees by name.
public ArrayList searchByName(String name) {
ArrayList resultList = new ArrayList();
for (int i = 0; i < employees.length; i++) {
if (employees.getName().toUpperCase().indexOf(name.toUpperCase()) != -1) {
resultList.add(employees[i]);
return resultList;
// Search for employee by social security number.
public ArrayList searchBySsNum(String ssNum) {
ArrayList resultList = new ArrayList();
for (int i = 0; i < employees.length; i++) {
if (employees[i].getSsNum().equals(ssNum)) {
resultList.add(employees[i]);
return resultList;
<br> File Name : <b> Employee.java </b>
package com.solversa;
public class Employee
     private String name;
     private String ssNum;
     public Employee(String name, String ssNum) {
     this.name = name;
     this.ssNum = ssNum;
     public void setName(String name) {
     this.name = name;
     public String getName() {
     return name;
     public void setSsNum(String ssNum) {
     this.ssNum = ssNum;
     public String getSsNum() {
     return ssNum;
Pls help me out.
Not able to prompt errors.

Hello Friends,
I am not able to run validation using
validation.xml & validator-rules.xml.
Entire code in running prefectly but no error
messages are prompted.
Following is my code:
File Name : struts-config.xml
<struts-config>

<form-beans>
<form-bean name="searchForm"
type="com.solversa.SearchForm"/>
ans>

<global-forwards>
<forward name="search" path="/search.jsp"/>
global-forwards>

<action-mappings>
<action path="/search"
type="com.solversa.SearchAction"
name="searchForm"
scope="request"
validate="true"
input="/search.jsp">
tion>
</action-mappings>

<message-resources
parameter="ApplicationResources"/>

<plug-in
className="org.apache.struts.validator.ValidatorPlugI
">
<set-property property="pathnames"
value="/WEB-INF/validator-rules.xml,
/WEB-INF/validation.xml"/>
>
</struts-config>
<br> File Name : <b> validation.xml </b>
<form-validation>
<formset>
<form name="searchForm">
<field property="name" depends="minlength">
<arg key="label.search.name" position = "0"/>
<arg1 name="minlength" key="${var:minlength}"
resource="false"/>
<var>
<var-name>minlength</var-name>
<var-value>5</var-value>
</var>
</field>
<field property="ssNum" depends="mask">
<arg0 key="label.search.ssNum"/>
<var>
<var-name>mask</var-name>
<var-value>^\d{3}-\d{2}-\d{4}$</var-value>
</var>
</field>
/form>
</formset>
form-validation>
<br> File Name : <b> SearchForm.java </b>
package com.jamesholmes.minihr;
import java.util.List;
import org.apache.struts.validator.ValidatorForm;
public class SearchForm extends ValidatorForm
private String name = null;
private String ssNum = null;
private List results = null;
public void setName(String name) {
this.name = name;
public String getName() {
return name;
public void setSsNum(String ssNum) {
this.ssNum = ssNum;
public String getSsNum() {
return ssNum;
public void setResults(List results) {
this.results = results;
public List getResults() {
return results;
<br> File Name : <b> SearchAction.java </b>
package com.jamesholmes.minihr;
import java.util.ArrayList;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public final class SearchAction extends Action
public ActionForward execute(ActionMapping
mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception
EmployeeSearchService service = new
EmployeeSearchService();
ArrayList results;
SearchForm searchForm = (SearchForm) form;
// Perform employee search based on what criteria
was entered.
String name = searchForm.getName();
if (name != null && name.trim().length() > 0) {
results = service.searchByName(name);
else {
results =
service.searchBySsNum(searchForm.getSsNum().trim());
// Place search results in SearchForm for access
by JSP.
searchForm.setResults(results);
// Forward control to this Action's input page.
return mapping.getInputForward();
<br> File Name : <b> EmployeeSearchService.java </b>
package com.jamesholmes.minihr;
import java.util.ArrayList;
public class EmployeeSearchService
/* Hard-coded sample data. Normally this would come
from a real data
source such as a database. */
ivate static Employee[] employees =
new Employee("Bob Davidson", "123-45-6789"),
new Employee("Mary Williams", "987-65-4321"),
new Employee("Jim Smith", "111-11-1111"),
new Employee("Beverly Harris", "222-22-2222"),
new Employee("Thomas Frank", "333-33-3333"),
new Employee("Jim Davidson", "444-44-4444")
// Search for employees by name.
public ArrayList searchByName(String name) {
ArrayList resultList = new ArrayList();
for (int i = 0; i < employees.length; i++) {
if
(employees.getName().toUpperCase().indexOf(name.toU
pperCase()) != -1) {
resultList.add(employees[i]);
return resultList;
// Search for employee by social security number.
public ArrayList searchBySsNum(String ssNum) {
ArrayList resultList = new ArrayList();
for (int i = 0; i < employees.length; i++) {
if (employees[i].getSsNum().equals(ssNum)) {
resultList.add(employees[i]);
return resultList;
<br> File Name : <b> Employee.java </b>
package com.solversa;
public class Employee
     private String name;
     private String ssNum;
     public Employee(String name, String ssNum) {
     this.name = name;
     this.ssNum = ssNum;
     public void setName(String name) {
     this.name = name;
     public String getName() {
     return name;
     public void setSsNum(String ssNum) {
     this.ssNum = ssNum;
     public String getSsNum() {
     return ssNum;
Pls help me out.
Not able to prompt errors.
Hi,
Your error message are not displaying because u does not made Message-Resoucrce property file (Resource Bundle) when you make it .
give it entry in
struts-config.xml
<message-resources parameter="ApplicationResources" />
and
define key and corresponding error message to key in this ApplicationResources i.e
#Error Resources
label.search.ssNum=Plz Enter correct ssNum

How to get values from a table(in jsp) for validation using javascript.

hi,
this is praveen,pls tell me the procedure to get values from a table(in jsp) for validation using javascript.
thank you in advance.

Yes i did try the same ..
BEGIN
select PROD_tYPE into :P185_OFF_CITY from
magcrm_setup where atype = 'CITY' ;
:p185_OFF_CITY := 'XXX';
insert into mtest values ('inside foolter');
END;
When i checked the mtest table it shos me the row inserted...
inside foolter .. Now this means everything did get execute properly
But still the vallue of off_city is null or emtpy...
i check the filed and still its empty..
while mtest had those records..seems like some process is cleaining the values...but cant see such process...
a bit confused..here..I tried on Load after footer...
tried chaning the squence number of process ..but still it doesnt help
some how the session variables gets changed...and it is changed to empty
Edited by: pauljohny on Jan 3, 2012 2:01 AM
Edited by: pauljohny on Jan 3, 2012 2:03 AM

How do I do validation using SDK.

How do I do validation using SDK.
We have created different warehouses for the client business operations.
For eg:
1. Inspection Stores
2. Rejection Stores
3. Main Stores
In Goods Return & A/P Credit Memo, other than RejectionStores is
selected, we want to generate a warning message.
How do I do this through SDK.
I need the code sample for the following activity:
1. Reading the data available at each row of the current form (Goods
Return/ A/P Credit memo)
2. Validate the data with a paricular warehouse
3. Generate warning message.
I could not find any samples related to this.

There is a method called MessageBox for the Application object. Have a look at
the documentation, everything is there.

Hello guys..does anybody know how to install and use adobe master collection with the new lion? I need to use Flash and illustratore, but apparently those programmes are incompatible with the new operative sistem... I am a new mac users and I'd like t

Hello guys..does anybody know how to install and use adobe master collection with the new lion?
I need to use Flash and illustratore, but apparently those programmes are incompatible with the new operative sistem...
I am a new mac users and I'd like to know if there are other similar programmes I can use with lion!

Lab79 wrote:
Are you on Apple's payroll?
well dude I can only let you know that as I work with those programme I don't have to pay for it is my company that pays the programme I whant to use( that's why I was asking if there where other programmes ..that I could use with lion insted that Illustrator and Flash!)..I know Adobe since 2005 and I can say that Adobs products are very good...I think that if it's an Adobe probleme or fault ..they will solve it very soon...but unfortunally I have the impression that after Jobs passed away Appel decided to change politics..and everything started to go very bad! (see FCP X)..
good luck with apple dude..
Where is the Apple problem? I have CS4 and CS5 running perfectly fine on my Macbook Pro. Installed 5 after Lion upgrade. Worth every cent. Adobe did have some catching up to do with Lion but with the CS5.5 update all runs fine. But not yours. So it is a problem with the Lion OS? You say you have been with Adobe since 2005. So you would be aware of all the other issues that Adobe had catching up with past Oss in Mac and Windows then. They get it right, but it is up to them. It is not up to Apple, nor Microsoft for that matter, to run around and check that every software developer in the world is running their business properly.
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Bye

Struts2 - Dynamic values in expression while doing validations using annota

Hi,
I am using Struts2. I am doing validations using annotations in action class.
I have many forms having same type of fields say zip code.
I am adding validations like below in each action class having zip code field
@Action(value = "/saveData")
@Validations(
     regexFields = {
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public String saveData() throws Exception {
Now, in case if I need to change the expression for zip code validations, then I need to modify the same in each action class.
I would like to know if there is any way to use java variable or property for expression so that i only need to change at one place (value of variable) and all actions get modified.
I want something like below
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@Action(value = "/saveData")
@Validations(
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Thanks
Krishan Babbar

Thanks
That is working..
I defined my expression as constant in my another file and it is working fine....
One more question i need to check space in expression but its not working... I tried following:
expression = "^([a-zA-Z0-9@_.-\\s]+)$" and expression = "^([a-zA-Z0-9@_.-\\\\s]+)$"

Pre-validation using JavaScript cannot work in JSF?

Sometimes we need to do pre-validation using JavaScript in some senarios that data need be entered and validated at client site before it reaches to Web Application Server. Remind that JSF is a server validation. Creator seems not to allow Developers to do pre-validation using JavaScript for any editable input fields in form. I will illustrate an example and hope anyone can help me to solve it out.
Assume that if we write the a new web page that allows User enters Name and Phone. The pre-validation function called test() is written in JavaScript for validating field Phone. For simplicity, the below HTML/JavaScript without nested in table is a simple one for HTML form.
<html>
<body>
<script language="JavaScript">
function test(){
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</script>
<form name=form1>
<input id="phone" type="text" size=20><Br>
<input id="name" type="text" size=20><Br>
<input type="submit" id="submit" onclick="test()" value="Submit">
</form>
</body>
</html>
Now, we consider using Java Studio Creator to generate the same form as describing above. The script is shown below:
<?xml version="1.0"?>
<jsp:root version="1.2" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:jsp="http://java.sun.com/JSP/Page">
<jsp:directive.page contentType="text/html;charset=UTF-8"/>
<f:view>
<html>
<head>
<title>testForm Title</title>
</head>
<body rave-layout="grid">
<h:form binding="#{testForm.form1}" id="form1">
<h:inputText binding="#{testForm.textField1}" id="phone" style="position: absolute; left: 192px; top: 96px; width: 168px; height: 23px"/>
<h:inputText binding="#{testForm.textField2}" id="name" style="position: absolute; left: 192px; top: 144px; width: 168px; height: 23px"/>
<h:commandButton binding="#{testForm.button1}" id="submit" style="position: absolute; left: 192px; top: 216px" value="Submit"/>
</h:form>
</body>
</html>
</f:view>
</jsp:root>
After running Script that Creator created, the HTML is generated and reduced (for simplicity) as follows:
<f:view>
<html>
<body rave-layout="grid">
<form action="/rave/rave" id="form1" method="post">
<input id="form1:Phone" type="text"></input>
<input id="form1:name" type="text"></input>
<input id="form1:button1" value="Submit" onClick="test()"></input>
</body>
</html>
</f:view>
Take a look carefully at <input> elements. We see the syntax for naming for each "input" element that there is a semi colon added between form1 and phone or form1 and name. This syntax is generated from built-in JSF components. Hence, I rewrite the test() JavaScript function to match with the naming that Creator generated as follows:
<script language="JavaScript">
function test(){
     if (form1.form1:Phone.value == "")
          alert("Please enter phone number in digits.");
          return false;
</script>
Clearly, this JavaScript cannot be worked because of a semi column that Creator has named it.
I have tried to work arround for this but cannot find a solution except changing the name such as: from <input id="form1:phone" ...> to <input id="form1_phone" ..>. But I could not change or modify the scripts because it is generated from JSF components when running it under browser.
I guess to solve this problem, the naming for elements in form should be reconsidered in the next release of Java Studio Creator.

Hi Marie,
I currently sucess in client pre-validation using JSF. I found a way to do it.
Please take a look of how javascript has been added in the following scripts:
<?xml version="1.0" encoding="UTF-8"?>
<jsp:root version="1.2" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:jsp="http://java.sun.com/JSP/Page">
<jsp:directive.page contentType="text/html;charset=UTF-8"/>
<f:view>
<html lang="en-US" xml:lang="en-US">
<head>
<meta content="no-cache" http-equiv="Cache-Control"/>
<meta content="no-cache" http-equiv="Pragma"/>
<title>login Title</title>
</head>
<body style="-rave-layout: grid">
<h:form binding="#{login.form1}" id="form1">
<h:outputLabel binding="#{login.componentLabel1}" for="componentLabel1" id="componentLabel1" style="position: absolute; left: 216px; top: 72px">
<h:outputText binding="#{login.componentLabel1Text}" id="componentLabel1Text" value="Application System Name"/>
</h:outputLabel>
<h:panelGrid binding="#{login.gridPanel1}" columns="3" id="gridPanel1" style="position: absolute; left: 72px; top: 168px; width: 504px; height: 100px">
<h:outputLabel binding="#{login.componentLabel2}" for="componentLabel2" id="componentLabel2">
<h:outputText binding="#{login.componentLabel2Text}" id="componentLabel2Text" value="User Name: "/>
</h:outputLabel>
<h:inputText binding="#{login.textField1}" id="textField1" onclick="" style="width: 149px; height: 22px"/>
<h:outputText binding="#{login.outputText1}" id="outputText1"/>
<h:outputLabel binding="#{login.componentLabel3}" for="componentLabel3" id="componentLabel3">
<h:outputText binding="#{login.componentLabel3Text}" id="componentLabel3Text" value="Password: "/>
</h:outputLabel>
<h:inputSecret binding="#{login.textField2}" id="textField2" style="width: 147px; height: 22px"/>
<h:outputText binding="#{login.outputText2}" id="outputText2"/>
<h:outputLabel binding="#{login.componentLabel4}" for="componentLabel4" id="componentLabel4">
<h:outputText binding="#{login.componentLabel4Text}" id="componentLabel4Text"/>
</h:outputLabel>
<h:commandButton action="#{login.ok_action}" binding="#{login.button1}" id="button1" onclick="return checkUserIdentity(this.form)"
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<h:outputLabel binding="#{login.componentLabel5}" for="componentLabel5" id="componentLabel5">
<h:outputText binding="#{login.componentLabel5Text}" id="componentLabel5Text"/>
</h:outputLabel>
</h:panelGrid>
</h:form>
</body>
<script type="text/javascript">
function checkUserIdentity(form){
var userName = form["form1:textField1"].value;
var userPassword = form["form1:textField2"].value;
if (userName == "") {
alert("Please enter User Name.");
form["form1:textField1"].focus();
return false;
if (userPassword == "" ){
alert("Please enter password.");
form["form1:textField2"].focus();
return false;
form.submit();
return true;
</script>
</html>
</f:view>
</jsp:root>
The key for getting data value from Form based on Javascripts is var userName = form["form1:textField1"].value;
Thanks,
VTT_

Strange memory behaviour using the System.Collections.Hashtable in object reference

Dear all,
Recently I came across a strange memory behaviour when comparing the system.collections.hashtable versus de scripting.dictionary object and thought to analyse it a bit in depth. First I thought I incorrectly destroyed references to the class and
child classes but even when properly destroying them (and even implemented a "SafeObject" with deallocate method) I kept seeing strange memory behaviour.
Hope this will help others when facing strange memory usage BUT I dont have a solution to the problem (yet) suggestions are welcome.
Setting:
I have a parent class that stores data in child classes through the use of a dictionary object. I want to store many differenct items in memory and fetching or alteging them must be as efficient as possible using the dictionary ability of retrieving key
/ value pairs. When the child class (which I store in the dictionary as value) contains another dictionary object memory handeling is as expected where all used memory is release upon the objects leaving scope (or destroyed via code). When I use a system.collection.hashtable
no memory is released at all though apears to have some internal flag that marks it as useable for another system.collection.hashtable object.
I created a small test snippet of code to test this behaviour with (running excel from the Office Plus 2010 version) The snippet contains a module to instantiate the parent class and child classes that will contain the data. One sub will test the Hash functionality
and the other sub will test the dictionary functionality.
Module1
Option Explicit
Sub testHash()
Dim Parent As parent_class
Dim d_Count As Double
'Instantiate parent class
Set Parent = New parent_class
'Create a child using the hash collection object
Parent.AddChildHash "TEST_hash"
Dim d_CycleCount As Double
d_CycleCount = 50000
'Add dummy data records to the child container with x amount of data For d_Count = 0 To d_CycleCount
Parent.ChildContainer("TEST_hash").InsertDataToHash CStr(d_Count), "dummy data"
Next
'Killing the parent when it goes out of scope should kill the childs. (Try it out and watch for the termination debug messages)
'According to documentation and debug messages not really required!
Set Parent.ChildContainer("TEST_hash") = Nothing
'According to documentation not really as we are leaving scope but just to be consistent.. kill the parent!
Set Parent = Nothing
End Sub
Sub testDict()
Dim Parent As parent_class
Dim d_Count As Double
'Instantiate parent class
Set Parent = New parent_class
'Create a child using the dictionary object
Parent.AddChildDict "TEST_dict"
Dim d_CycleCount As Double
d_CycleCount = 50000
'Blow up the memory with x amount of records
Dim s_SheetCycleCount As String
s_SheetCycleCount = ThisWorkbook.Worksheets("ButtonSheet").Range("K2").Value
If IsNumeric(s_SheetCycleCount) Then d_CycleCount = CDbl(s_SheetCycleCount)
'Add dummy data records to the child container
For d_Count = 0 To d_CycleCount
Parent.ChildContainer("TEST_dict").InsertDataToDict CStr(d_Count), "dummy data"
Next
'Killing the parent when it goes out of scope should kill the childs. (Try it out and watch for the termination debug messages)
'According to documentation and debug messages not really required!
Set Parent.ChildContainer("TEST_dict") = Nothing
'According to documentation not really as we are leaving scope but just to be consistent.. kill the parent!
Set Parent = Nothing
End Sub
parent_class:
Option Explicit
Public ChildContainer As Object
Private Counter As Double
Private Sub Class_Initialize()
Debug.Print "Parent initialized"
Set ChildContainer = CreateObject("Scripting.dictionary")
End Sub
Public Sub AddChildHash(ByRef ChildKey As String)
If Not ChildContainer.Exists(ChildKey) Then
Dim TmpChild As child_class_hashtable
Set TmpChild = New child_class_hashtable
ChildContainer.Add ChildKey, TmpChild
Counter = Counter + 1
Set TmpChild = Nothing
End If
End Sub
Public Sub AddChildDict(ByRef ChildKey As String)
If Not ChildContainer.Exists(ChildKey) Then
Dim TmpChild As child_class_dict
Set TmpChild = New child_class_dict
ChildContainer.Add ChildKey, TmpChild
Counter = Counter + 1
Set TmpChild = Nothing
End If
End Sub
Private Sub Class_Terminate()
Debug.Print "Parent being killed, first kill all childs (if there are any left!) - muahaha"
Set ChildContainer = Nothing
Debug.Print "Parent killed"
End Sub
child_class_dict
Option Explicit
Public MemmoryLeakObject As Object
Private Sub Class_Initialize()
Debug.Print "Child using Scripting.Dictionary initialized"
Set MemmoryLeakObject = CreateObject("Scripting.Dictionary")
End Sub
Public Sub InsertDataToDict(ByRef KeyValue As String, ByRef DataValue As String)
If Not MemmoryLeakObject.Exists(KeyValue) Then MemmoryLeakObject.Add KeyValue, DataValue
End Sub
Private Sub Class_Terminate()
Debug.Print "Child using Scripting.Dictionary terminated"
Set MemmoryLeakObject = Nothing
End Sub
child_class_hash:
Option Explicit
Public MemmoryLeakObject As Object
Private Sub Class_Initialize()
Debug.Print "Child using System.Collections.Hashtable initialized"
Set MemmoryLeakObject = CreateObject("System.Collections.Hashtable")
End Sub
Public Sub InsertDataToHash(ByRef KeyValue As String, ByRef DataValue As String)
If Not MemmoryLeakObject.ContainsKey(KeyValue) Then MemmoryLeakObject.Add KeyValue, DataValue
End Sub
Private Sub Class_Terminate()
Debug.Print "Child using System.Collections.Hashtable terminated"
Set MemmoryLeakObject = Nothing
End Sub
Statistics:
TEST: (Chronologically ordered)
1.1 Excel starting memory: 25.324 kb approximately
Max memory usage after hash (500.000 records) 84.352 kb approximately
Memory released: 0 %
1.2 max memory usages after 2nd consequtive hash usage 81.616 kb approximately
"observation:
- memory is released then reused
- less max memory consumed"
1.3 max memory usages after 3rd consequtive hash usage 80.000 kb approximately
"observation:
- memory is released then reused
- less max memory consumed"
1.4 Running the dictionary procedure after any of the hash runs will start from the already allocated memory
In this case from 80000 kb to 147000 kb
Close excel, free up memory and restart excel
2.1 Excel starting memory: 25.324 kb approximately
Max memory usage after dict (500.000 records) 90.000 kb approximately
Memory released: 91,9%
2.2 Excel starting memory 2nd consequtive dict run: 27.552 kb approximately
Max memory usage after dict (500.000 records) 90.000 kb approximately
Memory released: 99,4%
2.3 Excel starting memory 3rd consequtive dict run: 27.712 kb approximately
Max memory usage after dict (500.000 records) 90.000 kb approximately
Memory released:

Hi Cor,
Thank you for going through my post and took the time to reply :) Most apreciated. The issue I am facing is that the memory is not reallocated when using mixed object types and is not behaving the same. I not understand that .net versus the older methods
use memory allocation differently and perhaps using the .net dictionary object (in stead of the scripting.dictionary) may lead to similar behaviour. {Curious to find that out -> put to the to do list of interesting thingies to explore}
I agree that allocated memory is not a bad thing as the blocks are already assigned to the program and therefore should be reallocated with more performance. However the dictionary object versus hashtable perform almost identical (and sometimes even favor
the dictionary object)
The hashtable is clearly the winner when dealing with small sets of data.
The issue arises when I am using the hash table in conjunction with another type, for example a dictionary, I see that the dictionary object's memory is stacked on top of the claimed memory space of the hashtable. It appears that .net memory allocation and
reuse is for .net references only. :) (Or so it seems)
In another example I got with the similar setup, I see that the total used memory is never released or reclaimed and leakage of around 20% allocated memory remains to eventually crash the system with the out of memory message. (This is when another class
calls the parent class that instantiates the child class but thats not the point of the question at hand)
This leakage drove me to investigate and create the example of this post in the first place. For the solution with the class -> parent class -> child class memory leak I switched all to dictionaries and no leakage occurs anymore but nevertheless thought
it may be good to share / ask if anyone else knows more :D (Never to old to learn something new)

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