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Bug 318421

Summary:	Static weaving - please improve processing speed and performance
Product:	z_Archived	Reporter:	Igor Mukhin <iimuhin>
Component:	Eclipselink	Assignee:	Project Inbox <eclipselink.orm-inbox>
Status:	NEW ---	QA Contact:
Severity:	enhancement
Priority:	P3	CC:	martin.grebac
Version:	unspecified
Target Milestone:	---
Hardware:	PC
OS:	Windows XP
Whiteboard:

Description Igor Mukhin

2010-06-30 04:14:30 EDT

Build Identifier: 20100617-1415

We use static weaving while development. For each build we wait 40 seconds for static weaving to process 20 entities on 2,4Gh 2Core PC.

Can it be improved?

Reproducible: Always

Steps to Reproduce:
1. Create some entities (something like 20)
2. Create ant file for static weaving
3. Run it 1000 times.
4. Wait 11 hours (40 sec * 1000)
5. Hate it.

Comment 1 Igor Mukhin

2010-06-30 10:51:49 EDT

I just found out that, it only happens if you weave to the same direcotry, where the original classes are.

If you weave to somewhere else, it lasts just 5 seconds.

Comment 2 Igor Mukhin

2010-06-30 12:51:06 EDT

I found out that the problem only occurs on Windows XP. 
My colleague has Windows 7 and the weaving lasts 5 seconds.

So I coded the weaving for WinXP in this way:
- rename /classes to /unweaved_<timestamp>
- waave from /unweaved_<timestamp> to /weaved_<timestamp>
- move from /weaved_<timestamp> to /classes

Only that way it works fast on WinXP.

Comment 3 Igor Mukhin

2010-06-30 12:53:33 EDT

The possible solution is may be to not use URLClassLoader in org.eclipse.persistence.tools.weaving.jpa.StaticWeaveProcessor in process().

The line is:
        this.classLoader = new URLClassLoader(getURLs(), this.classLoader);


May be there is a classLoader that doesn't lock the files.

Comment 4 Eclipse Webmaster

2022-06-09 10:08:33 EDT

The Eclipselink project has moved to Github: https://github.com/eclipse-ee4j/eclipselink

Comment 5 Eclipse Webmaster

2022-06-09 10:16:06 EDT

The Eclipselink project has moved to Github: https://github.com/eclipse-ee4j/eclipselink