Reference Object and New Key Word

Hi,
I am having a Class call ThreadHandler which implements Runnable()
I loop through 10 times like below
for (int i = 0; i < 10; i++) {
ThreadHandler oTHandler = new ThreadHandler();
Thread oTh = new Thread(oTHandler);
oTh.start();
Question:
1. Will this create unnecessary referencing to ThreadHandler?
2. Can I just instantiate ThreadHandler at the attribute declaration and just use new key word every time in the loop
E.g :
ThreadHandler oTHandler
Thread oTh
for (int i = 0; i < 10; i++) {
oTHandler = new ThreadHandler();
oTh = new Thread(oTHandler);
oTh.start();
}

Suppose we say:
for(ndx = 0; ndx < 1000; ndx++) {
Type foo = new Type("etc");
// <-- foo is no longer in scopeI'm not 100% sure what you mean "unnecessary referencing of..." but if you declare inside the for loop then there will be nothing referenced by foo after the loop. So, if anything there is less referencing going on.
It is considered good practice to declare things close to where you use them. Because your intent is clearer that way.

Similar Messages

How usnig manuplate the Import and export Key word.

How usnig manuplate the Import and export Key word? and
how do the clear of those variable?

HI ,
For IMPORT Keyword :---
To retrieve data from the global memory area, use the IMPORT statement. The most basic form of the IMPORT statement is:
IMPORT <variable> FROM MEMORY.
To give the variable a different name in your program from what it is called in the global memory area, use the TO clause. You must define the local variable name with a DATA statement in your program. The format is:
IMPORT <global var> TO <program var> FROM MEMORY.
As with the EXPORT statement, you can specify multiple variables per statement, and you have the option of specifying which cluster ID you wish to import from.
After each IMPORT statement, SY-SUBRC is set to indicate whether or not the cluster ID you specified exists (but not whether specific variables were imported specifically). SY-SUBRC is zero if the cluster exists.
It is also possible to IMPORT and EXPORT to database tables .
ABAP memory that is used to store exported data is user and transaction specific, so when passing data between programs in this manner you must make sure that transaction boundaries are not crossed. Otherwise the contents of this memory will get destroyed and will not be available to the importing program.
For Export Keyword :---
The EXPORT statement moves data from your program into a global memory area. The most basic form of the EXPORT statement is:
EXPORT <variable> TO MEMORY.
This places the specified variable into a global memory area that another program can later read using the IMPORT statement.
You may specify multiple fields in the same EXPORT statement. For example:
EXPORT KNA1-KUNNR KNA1-BUKRS TO MEMORY.
You can give variables a different name in the global memory area using the FROM clause. For example, the following code exports SY-SUBRC and gives it the name RETVAL in the global memory area:
EXPORT RETVAL FROM SY-SUBRC TO MEMORY.
You can specify a cluster ID when exporting data to memory. You can freely choose the name of the cluster ID, which can be up to 32 characters long. Each cluster ID specifies a particular area in memory. Each time you EXPORT data to the same cluster ID, all data previously written to that ID is erased. For example:
EXPORT SY-SUBRC TO MEMORY ID u2018LJS1u2019.
Hope u understand
Thanks
Shambhu

Reference Objects and Pooling

I am trying to create a Pool class that does not require the caller to explictly return the objects. I thought I might be able to use Phantomreference or WeakReference to detect when the user no longer had reference to the object and thus reclaim it and put it back in the pool. The issues with these are this:
1) WeakReference is cleared (clear()) before it is added to the ReferenceQueue not to mention the object is finalised before as well.
2) PhantomReference is not cleared but it is finalized. Not that it matters because you can never access the referant.
So what I did is subclass PhantomReference and created an Interface called Proxy. The subclass would take a proxy referant containing the actual reclaimable object and it would store the relaimable object as a hard referant and the proxy to that as the Phantom referant. Thus when the client was no longer using the proxy the erference would be added to the reference queue and I could get the actual reclaimable object as opposed to the proxy via a call to get().
The problem with this approach has been that not all classes lend well to being proxied. The idea situation would be that the Proxy would extend the actual class thus CASTING would work as normal.
public StringBufferProxy extends StringBuffer implements Proxy {
private StringBuffer proxy;
public StringBufferProxy(StringBuffer proxy)
this.proxy = proxy;
public Object getProxied()
return proxy;
public void anyMethod()
proxy.anyMethod();
The obvious problem with the above is that StringBuffer is final and thus can't be extended. Similar problems with Thread as it relates to its final methods. So in the end after going around in circles for awhile I realized this concept would only really be practicle for Interface based classes.
Has anyone else worked this problem and solved it?
}

all cases the referant has allready been finalized. In...
So what I tried to do was create a proxy class that
wraps the actual pooled item....
This has numerous problems.You may like my method. Someone needs to tell me if this is a ``bad thing'' but I've used it quite successfully. I wrote a cache class a little while ago (very similar to your Pool needs). It's a cloning cache. Let me simplify a VERY complex cache:
class Clone implements Cloneable {
    private Object o;
    Clone(Object o) {
        super();
        this.o = o;
    public Object getObject() { return o; }
    public Clone getClone() throws ... {
        return (Clone)super.clone();
} // CloneThis sets up the clone, now:
class CloneReference extends WeakReference implements Comparable { // or extend any Reference that makes sense to you
    private Clone clone = null;
    CloneReference(Clone referent, ReferenceQueue q) throws ... {
        super(referent,q);
        try { // don't really have to try, but...
            clone = (Clone)referent.getClone();
        } catch(Exception dowhatever) { ... }
    public Object getObject() {
        Object ret = null;
        if(clone!=null) ret = clone.getObject();
        return ret;
    // now implement Comparable
} // CloneReferenceNow in your Pool maintain your ReferenceQueue, when you add a new Object into it, purgue this queue. In my cache I have a CacheEvent/CacheListener that is event fired during the purging of this queue. More later. When adding a new object into your Pool, add a reference to a new CloneReference object:
private ReferenceQueue q; // init elsewhere
public void add(Object o) throws ... {
    CloneReference cr = new CloneReference(
          new Clone(obj)
        , q
    // now add this cr, not the o
}When purging the queue, poll() your ReferenceQueue and then obtain the CloneReference. Get your object back out (this will not be null or yet finalized) using CloneReference.getObject(), then fire off your interpretation of my CacheEvent to your version of my CacheListener.
Note that the ReferenceQueue maintains a reference to the original Clone, but the Reference itself has a clone of that Clone which we will NOT be GCd or nullified still maintaining a reference to the original object.
If you need further help I can probably provide a truncated source of a simple Cache.

Multi provider objects and restricted key figure definition

I have the following scenario:
1. I have a multi provider which is used as a template to build a second multiprovider the difference being one of the part provider cubes is replaced by a new cube
2. There is a query built off the original multi provider which consists of a restricted key figure. The definition of the restricted key figure is as follows
    Characteristic 1 - restricted to records with value 'A'
    Characteristic 2 - restricted to records with value 'Blue'
    Key Figure - Total Amount
3. If I go to the original multiprovider and look at how the characteristics are identified and the key figure assigned the details are as follows
     Characteristic 1 - identified from all part providers including the part provider to be replaced
    Characteristic 2 - identified from all part providers including the part provider to be replaced
    Total Amount - assigned from two part providers (which are also involved in the identification of   Characteristic 1 and 2) not including the part provider to be replaced
4. In the new multi provider the details are as follows
Characteristic 1 - identified from all part providers excluding the replacement part provider
    Characteristic 2 - identified from all part providers excluding the replacement part provider
    Total Amount - assigned from two part providers (which are also involved in the identification of   Characteristic 1 and 2) not including the part provider to be replaced
My thoughts are that it does not matter that Characteristic 1 and 2 cannot be identified from the new part provider since as long as the two part providers which are used to assign Total Amount are available in the new multi provider the values shown from the restricted key figure will be the same. Is this correct? Thanks

Hi,
Yes this is correct. As long as you are reporting on Total Amount, the replacement cube will not make a difference because you never identified total amount from it. Did you face any issues?

How to Implement Abap Object and Access Key for se24 developers.

Hi every One,
This is Abdul Rahman, Started Learning Abap Objects i want a simple program to be executed i.e. in Local class (Abap program)and as well in global class(class builder).
Also i would like to know When ,Were and Why Abap Object should be used.
prob to Me :- When i wanted execute F8 a Class in se24 Class Builder it is asking me AcessKey , plz if this is required plz any one send Me.
I have this key 36687663221261278694 it is already used in Abap editor , it is not accepting in se24 .
plz help Me , waiting for response ..
thankyou so much
Abdul Rahman.

Hello Abdul
Here are my answers to your questions:
(1) Local classes: Do not use them.
- As long as your class is rather small (few attributes and methods), local classes are ok yet as soon as they become larger you will loose the overview
(2) Global classes: Do use them.
- Make use of global classes even if they are only used for your training. The big advantage over local classes is that you will get used to the classe builder (SE24) which has a plethora of functions.
(3) Executing global classes: Can be done if you have defined an OO-transaction.
- An OO-transaction has a class and one of its public methods as parameters (similar like report transactions). When you all the OO-transaction an instance of you class is created and the public method is called.
(4) Where and Why use ABAP Objects? Everywhere. Anytime.
- ABAP objects is about stability, maintainability and re-usability of coding. These developer aims can be much more fulfilled using ABAP OO means than in classical programming.
Regards
Uwe
PS: There are situations where local classes are quite appropriate and, using ABAP Unit testing, are obligatory.

Insertion in object used SCOPE key word

I created a type object a including columns (id,name,gndr). I created a table b based on object a
create table b of a;
An other table I created c with
(c_id number(3),
person REF a SCOPE IS b)
What is the Insert statement of C.
Please give me the correct answer with What version used.

Mohammad,
Did you resolve the REF problem you had? What versio are you using? The following works for both 8i and 9i.
INSERT INTO C VALUES
(23,
SELECT REF(p) FROM B p WHERE id = 2);
You should also check out more examples at http://download-west.oracle.com/otndoc/oracle9i/901_doc/appdev.901/a88878/adobjdes.htm#441286.
Regards,
Geoff
null

G4 Power Book up and running good as new after Mac OS X install per instructions from original guide book. from disk and new pass word set per instructions in the guide book that came with the product.

G4 Power Book up and running good as new after Mac OS X install from disk per instructions from original guide book.

Glad to hear it. Enjoy your resurrected Power Book!

At end of and sum key word is not working properly

Hi All,
I have a requirement in that I have to calculate at the end of each fiscal year.
I am using this section of code, But in my output its only showing me the value of the last record, its not summing up at the end of fiscal year.
This is my section of code.
SORT IT_BSEG BY GJAHR.
LOOP AT IT_BSEG INTO WA_BSEG.
AT END OF GJAHR.
SUM.
        LOOP AT IT_ITAB INTO WA_ITAB WHERE GJAHR = WA_BSEG-GJAHR. " AND SPART = WA_VBRK-SPART.
          WA_ITAB-PRICE = WA_BSEG-DUE_AMT.
   MODIFY IT_ITAB FROM WA_ITAB TRANSPORTING PRICE SPART.
   clear wa_itab.
ENDLOOP.
ENDAT.
ENDLOOP.
Can any body let me know where is the mistake.

Hi Madhukar,
              As per my last thread the issue got resolved but now the challenge in front of me is to calcuclate the over due amount into if it lies in 0 to 30 days, 31 to 60 days, 61 to 90 days, 91 to 120 days and above 120 days.
I used this logic but could not able to get the desired result. Please need u r help.
Here I am posting the section of code which i am using to get the desired result.
" 1 means 0 to 30 days
    " 2 means 31 to 60 days
    " 3 means 61 to 90 days
    " 4 means 91 to 120 days
    " 5 means above 121 days
    IF WA_BSEG-DAYS_NO GE 0 AND WA_BSEG-DAYS_NO LE 30.
      WA_BSEG-DUER1 = '1'.
    ELSEIF WA_BSEG-DAYS_NO GE 31 AND WA_BSEG-DAYS_NO LE 60.
      WA_BSEG-DUER1 = '2'.
    ELSEIF WA_BSEG-DAYS_NO GE 61 AND WA_BSEG-DAYS_NO LE 90.
      WA_BSEG-DUER1 = '3'.
    ELSEIF WA_BSEG-DAYS_NO GE 91 AND WA_BSEG-DAYS_NO LE 120.
      WA_BSEG-DUER1 = '4'.
    ELSE. " means it is greater than 120
      WA_BSEG-DUER1 = '5'.
    ENDIF.
SORT IT_BSEG BY GJAHR DUER1.
LOOP AT IT_BSEG INTO WA_BSEG.
AT END OF GJAHR.
SUM.
        LOOP AT IT_ITAB INTO WA_ITAB WHERE GJAHR = WA_BSEG-GJAHR.
          WA_ITAB-PRICE = WA_BSEG-DUE_AMT.
IF WA_BSEG-AMTCAL = 'O'.
AT LAST.
ON CHANGE OF WA_BSEG-DUER1.
SUM.
          WA_ITAB-PRICE = WA_BSEG-DUE_AMT.
ENDON.
ENDAT.
ELSE.
AT LAST.
    WA_BSEG-AMTCAL = 'D'.
ON CHANGE OF WA_BSEG-DUER1.
SUM.
          WA_ITAB-PRICE = WA_BSEG-DUE_AMT.
ENDON.
ENDAT.
ENDIF.
   MODIFY IT_ITAB FROM WA_ITAB TRANSPORTING PRICE SPART.
   clear wa_itab.
ENDLOOP.
Thanks in Advance

The truth about objects, references, instances and cloning (Trees and Lists

Hello
As a few of you may have know from my postings over the past few weeks, ive been building my first real java ap and trying to learn along the way, hitting a few snags here and there.
One main snag i seem to have been hitting a fair bit is objects and instances, im kinda learning on how they work and what they mean but as a php programmer it seems to be very different.
as pointed out to me if you have objectA=objectB then in php you have two objects that share the same value but in java you have still one object value and one object pointing to the value.
sooo my first question is
if i have this
Object objA=new Object()
Object objB=objA()then object A creates a new memory allocation for the object data right? and object B is simply a reference to the object A memory allocation right?
so therefore there is no instance of objectB? or is there an instance of object B but it just takes up the same memory allocation as object A?
anyway, what is the point of being able to say objB=objA what can that be used for if not for making a copy of an object (i understand now that it doesnt copy an object)
My second question (which i think i actually understand now, but im posting it to see if the answers may help others)
If i have a List structure (e.g. arraylist) then when i add a datatype such as a treemap does it not add the changed treemap, ill try and explain with code
ArrayList mylist=new ArrayList()
Treemap myTree=new Treemap()
myTree.put("hello","howdy");
myTree.put("bye","cya");
mylist.put(myTree);
System.out.println(mylist.toString());
myTree.put("another","one");
mylist.put(myTree);
System.out.println(mylist.toString());now to be honest ive not actually tried that code and it may actually procude the right results, but from my experience so far that similar sort of thing hasnt been working (by the way i know the above code wont compile as is :p)
anyway what i assume is that will output this
[Hello,howdy,bye,cya] <<this is the first system out
[Hello,howdy,bye,cya,another,one <<this is the second system out
Hello,howdy,bye,cya,another,one] <<this is the second system out
where it should produce this
[Hello,howdy,bye,cya,
Hello,howdy,bye,cya,another,one]
Why when I update the treemap does the arraylist change, is this because the thing that is being put in the array list is infact not an object but simply a reference to an object?
thanks for everyones help so far :)

as pointed out to me if you have objectA=objectB then
in php you have two objects that share the same value
but in java you have still one object value and one
object pointing to the value.Some years ago, I built a small website managing data saved in an XML file using PHP. Being used to Java, I used an OO approach and created classes managing data structures and having setter/getter methods. The fact that PHP did actually create a copy of any object being passed as and argument made me crazy. This way, I wasn't able to reach the same instances from several different places in my code. Instead, I had to put a certain operator ("&" I think) before any reference to force PHP not to make a copy but pass the reference. I also found a note on the PHP site saying that copying was faster than passing the reference, which I actually couldn't believe. If I'm not wrong, they changed the default behaviour in PHP5.
if i have this
Object objA=new Object()
Object objB=objA()then object A creates a new memory allocation for the
object data right? and object B is simply a reference
to the object A memory allocation right?The statement "new <Class>" allocates memory. The reference itself just takes up a few bytes in order to maintain some administrative data (such as the memory address). References are basically like pointers in C, though there's no pointer arithmetics and they can't point to any arbitrary place in memory (only a legal instance or null).
so therefore there is no instance of objectB? or is
there an instance of object B but it just takes up
the same memory allocation as object A?There is an instance of objectB, but it's just the same instance that objectA is pointing at. Both references objectA and objectB contain the same memory address. That's why they'd produce a result of "true" if compared using the "==" operator.
anyway, what is the point of being able to say
objB=objA what can that be used for if not for making
a copy of an object (i understand now that it doesnt
copy an object)Sometimes you don't want to make a copy, as 1) it consumes more memory and 2) you'd lose the reference to it (making it more difficult to tell what instance is actually accessed). If there was no way to pass a reference to an object into a method, methods wouldn't be able to affect the original instance.
Why when I update the treemap does the arraylist
change, is this because the thing that is being put
in the array list is infact not an object but simply
a reference to an object?The ArrayList doesn't change at all. It's the instance that's being changed, and the ArrayList has a reference to it.

Reporting on Key Words Assigned to Objects

Does anyone know how I can report on keywords assigned to IMG objects on the configuration tab? I cannot find anywhere in SOLAR_EVAL to report on this informaiton. We assign team names to the objects and I would like to report on object status by key word.

Hi Matt,
As far as I know, the functionality for displaying keywords for other objects than documents and and keywords assigned
to the administration tab is not availble yet.
Additionaly, this information is stored in table SABOATTRVALUES, maybe this helps you.
Kind regards,
Fabricius

Memory leak if assign new Object for existing Key in NSMutableDictionary ?

Say my NSMutableDictionary Object have a Key call @"Number" that holds a NSNumber.
If I were to create a new NSNumber via alloc and assign it to the Key @"Number" in my NSMutableDictionary object, what happen to the old NSNumber ?
Those NSNumber were created using alloc...

You can't just change a key. You can remove the object (and the key) and insert a new key/object.
When you remove a key/object from a dictionary, "release" will be called on both. Whether either or both objects are autoreleased or not is a different issue.

Reference object in Notification

Dear All,
I am new person in the SAP-PM module but I need to work on it. I have a quarry, what is reference object and reference object key in notification creation, in which table I need to see the values of the same.
Thanks and regards,
Krish....

Hi
Notification we create with reference to some object.
whch means it is refering some functional location , equipment etc.
So it is address some object against wihc notification is creating.
check table QMFE
regards
Krishna

Quality notification - more reference objects

Hello,
business need is to have quality notification with possibility to refer either production order or purchase order under one notification type.
By standard this seems not possible as:
Complaint Against Vendor references to Purchase order
Internal Problem Report references to Production order.
But in section "User-specific notification" is mentioned
A user-specific notification type has the same basic structure as the standard, predefined notification types. The screen layouts, reference objects, and tab indexes, however, may differ from those in the predefined notification types, depending on how you customize the user-specific notification type.
But I have not found a way in customizing to enable this.
Advice appreciated.
Br, Jan

Thanks for the asnwer, but I think this does not solve my problem.
In the configuaration for "Notification Header and Screen Areas" I do have
- notification header screen H500
- customized screen O550 (BADI)
and both are needed.
The BADI is used to customize refernce object screen, not reference documents screen. But my idea was to change reference document screen area in a way, that both purhcasing and production reference documents are visible in there.
I only managed to get the vendor screen by adding screen area 037 to "Extended View: Tabstrips and Screen Areas" But adding purhcase document as reference to Reference documents remains my problem.
I am kind of able to make the vendor screen visible by e.g. adding screen area 037 Partner overview screen (table control).But creating a new pop-up window for notification reference, where both options (pur ord, prod ord) would be available with copying functionality - in my opinion this requiers completely custom coding.

Dim and Fact Key sync and Clean up

Hello all,
We have some really bizarre thing going on in our DW environment, same ETL jobs is running twice and because of extremely bad design with no constraints at all, we have lots of duplicate records getting inserted.
So the actual row count in DIM table should be 3 mill, but because of these multiple runs the count is like 9 mill rows. I'll illustrate this with an example.
This is the Dimension table, column (HEADER_ITEM ,LINE_ITEM) is the NATURAL_KEY, while DIM_SK is the PK, as you can see the table has three occurrence of NATURAL_KEY with increasing PK, but some time it may have same PK too, as there is no actual PK constraint on this table.
CREATE TABLE SABEGH_DIM
DIM_SK DECIMAL(10),
HEADER_ITEM VARCHAR2(10),
LINE_ITEM VARCHAR2(10)
INSERT INTO SABEGH_DIM VALUES (1,'A','X');
INSERT INTO SABEGH_DIM VALUES (2,'A','X');
INSERT INTO SABEGH_DIM VALUES (3,'A','X');
INSERT INTO SABEGH_DIM VALUES (4,'B','Y');
INSERT INTO SABEGH_DIM VALUES (5,'B','Y');
INSERT INTO SABEGH_DIM VALUES (6,'B','Y');
INSERT INTO SABEGH_DIM VALUES (11,'C','Z');
INSERT INTO SABEGH_DIM VALUES (11,'C','Z');
INSERT INTO SABEGH_DIM VALUES (11,'C','Z');
And then there is a FACT table too, which is one-to-one with this DIM.
CREATE TABLE SABEGH_FACT
FACT_SK DECIMAL(10),
COL1 VARCHAR2(10),
COL2 VARCHAR2(10),
COL3 VARChAR2(10)
INSERT INTO SABEGH_FACT VALUES (1,'RAIN','DIDI', 'FF');
INSERT INTO SABEGH_FACT VALUES (3,'RAIN','DIDI', 'FF');
INSERT INTO SABEGH_FACT VALUES (5,'CNG','ZION','TEST');
INSERT INTO SABEGH_FACT VALUES (11,'CNG','ZION','TEST');
What I would like to do some clean up, on both these tables.
SABEGH_DIM :
1. Preserve the Maximum Key within the group of same NATURAL_KEY in DIM table, if there are dups, load only one record. So my SABEGH_DIM table finally should have these values:
3......A.....X
6......B.....Y
11....C.... .Z
SABEGH_FACT:
Since this FACT table, may still refer the old PK from the DIM, we need to change the PK appropriately, so that it ties up with the DIM correctly. SABEGH_FACT should contain now this data set, which is the final results.
i replaced old keys with new PK from the Dim, and if after this operation there are dups in FACT, load only one occurrence.
3.......RAIN........     DIDI.........FF
6.......CNG........     ZION........TEST
11.....CNG........     ZION........TEST
These table are really huge, so it would be nice to have some fast query, I can add INDEXES, CONSTRAINTS; if it helps to speed up the process. Also, I would like to have a cross-reference table, which as both old keys and new keys, there are other FACT tables, which are still referring the OLD PK from this DIM table, so I have to update that FACT table key as well,
DIM_PK.......HEADER_ITEM.......LINE_ITEM.......MAX_DIM_PK
1......A.....     X.....3
2.....     A.....     X.....3
3.....     A.....     X.....3
4.....     B.....     Y.....6
5.....     B.....     Y.....6
6.....     B.....     Y.....6
11.....C.....     Z.....11
11....     C.....     Z.....11
11.....C.....     Z.....11
So, I'll use this Cross-Reference table to update KEY in other FACT table.
Thanks a lot!
Sabegh

What I would like to do some clean up, on both these tables.Please proceed to do so.

Alignment tool - how to set reference object?

I am new to Flash but have used Illustrator and InDesign for years. I am wondering if someone can explain how to set the reference object by which all other objects are aligned; e.g. Illustrator ->select all objects then a second click on the reference object and all other objects take their cue.
InDesign you lock the reference object and that determines the rest.
In Flash it seems that either both objects move or the one that I wish to remain in position jumps rather than the other way around.
Thanks

I don't know if you can set a reference object in Flash. I have always just followed the general rule of aligning into the direction where the alignment basis would not move... meaning if I am aligning to the left, then the leftmost item I would select would be the reference, and if need be I would move other objects to the right of it first.

Reference Object and New Key Word

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