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heap size problem!!

Posted on 2007-04-09
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Last Modified: 2008-01-09
Hi experts ..

how to set the heap size for Apache Ant 1.7.0 ??
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Question by:DrAske
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Expert Comment

by:objects
ID: 18879183
specfy it using the ANT_OPTS env var

http://ant.apache.org/manual/running.html
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by:DrAske
ID: 18879198
you mean I have to add ANT_OPTS to enviroment variable??
could you pleas give me the full syntax I should put ??
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Author Comment

by:DrAske
ID: 18879213
I mean what should I put exactly in the enviroment varaible ?
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Expert Comment

by:objects
ID: 18879359
eg. to set it to 512Mb

ANT_OPS=-Xmx512m
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Expert Comment

by:objects
ID: 18879362
ANT_OPTS=-Xmx512m
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Author Comment

by:DrAske
ID: 18879409
Thank you, I'll try it tomorrow morning and I'll send back the result :o)
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Author Comment

by:DrAske
ID: 18880595
that's doesn't work!!
I've tried to set ANT_OPTS from the command prompt:
set ANT_OPTS = -Xms512m
set ANT_OPTS= -Xmx512m
It has been set successfully, but still get outOfMemory Error !!

What I'm trying to do is writing a JUnit testCase for a method in a class, this method returns the sum of size of 3 ArrayLists in this class, in that method I want to check if the counter == Integer.MAX_VALUE then return Integer.MAX_VALUE!!

To be able to test this method I have to set the three Lists to number of elements it exceeds Integer.MAX_VALUE, so when calling size() method it will return Integer.MAX_VALUE!!

This is the testCase, but It gives me outOfMemory during adding elements to the lists:
public void testCollectionView1Accuracy1() throws Exception {
            for (int i = 0; i < Integer.MAX_VALUE / 2+100; ++i){
                  collection.add(new Character('A'));
            }
            for(int i = 0; i<Integer.MAX_VALUE/2+100; ++i) {
           elementsToAdd.add(new Character('A'));
        }
        collectionView = new CollectionView(collection, elementsToAdd, null);
            assertTrue("size() incorrect.", collectionView.size() == Integer.MAX_VALUE);
    }

what should I do??
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Expert Comment

by:objects
ID: 18880604
that requests a lot motre than 512Mb doesn't it?
why does the test need to add so many elements to the collection?
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Author Comment

by:DrAske
ID: 18880616
The class is wrapper for some collections in java, I'm using it as a view so it allows to filter the collection, makes changes on it without affecting the original collection.

>>why does the test need to add so many elements to the collection?
to check if size() method returns Integer.MAX_VALUE if the sum of the three lists exceeds it!!
in the real-world this wrapper class will hold a large number of records from database, for large systems.
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Accepted Solution

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objects earned 500 total points
ID: 18880666

My calcs show that test needing 4Gb+ !!
Not a terribly friendly test :)
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Author Comment

by:DrAske
ID: 18880669
mmm!! I see, so my laptop won't handle it :o)

thank you very much,
I really appreciate your help :o)

regards,
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