Low level interfaces to JVM

Hi. I'm trying to write a java debugger in java. Sun mentions publicly available low level interfaces to the JVM for getting complete info on classes (ie things like private variables)
see the end of http://java.sun.com/docs/books/vmspec/2nd-edition/html/Overview.doc.html
I've been searching this site for "low level interface" but I haven't been able to find any information on this topic. Has anyone had any experience with this? Can anyone help me out?
Thanks,
Tom

There are a number of free publicly available
debuggers. You can get hold of their source for a
few ideas. e.g. Eclipse, NetBeansThanks for this peter. I think you're missing the point though. I am trying to build my own debugger so that I can precisely control the environment, not to do typical debugging. Even using an open source project, I think it would take me longer to try to fit in what I want to do into that than to build my own.

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Low-Level or High-Level for GUI ?

I am developing a MIDLet that has to run CLDC-1.1 MIDP-2.0 Devices. The MIDLet has a simple user interface, and there is no gaming. I developed the MIDLet using the high-level GUI class, but I discovered that this class is nice, yet limited. Now I am investigating using the low level canvas class for the GUI. Is it possible to maintain cross-platform compatibility with the canvas, or should I stick with the high-level class?

High Level Group
Classes provided are
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Low Level Group
Classes provided are
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High performance (low level) jdbc access routines

Does anyone know of any low level jdbc access routines?
My need is to be able to do high speed data access. I'm looking for something 2 orders of magnitude faster than what is available with the typical use of java.sql (connection, preparedstatement, resultset and so on).
Several years ago while using visual basic and odbc, I had to use direct calls to the odbc32.dll functions for data access to get the performance I wanted rather than the ado and rdo stuff. I am wondering what is available with jdbc - perhaps the routines that are used when writing jdbc drivers themselves. I don't know if there is an equivalent "gateway" that all jdbc drivers use (like the odbc32.dll that is used with all odbc drivers in windows)
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Does anyone know of any low level jdbc access routines? What are you expecting besides what is provided in the java.sql interfaces?
The JDBC spec spells out what the interfaces are. There isn't anything else to call.
>
My need is to be able to do high speed data access.
I'm looking for something 2 orders of magnitude
faster than what is available with the typical use
of java.sql (connection, preparedstatement, resultset
and so on).Faster than what driver talking to what database over what network?
Several years ago while using visual basic and odbc,
I had to use direct calls to the odbc32.dll functions
for data access to get the performance I wanted
rather than the ado and rdo stuff. I am wondering
what is available with jdbc - perhaps the routines
that are used when writing jdbc drivers themselves.You'll have to write your own driver.
I don't know if there is an equivalent "gateway"
" that all jdbc drivers use (like the odbc32.dll that
is used with all odbc drivers in windows)Since Java's platform-independent, there's no easy out like taking advantage of OS calls.
Any comments would be appreciated. Even just hints
as to where I might find this kind of information.Sounds to me like you want to write your own driver, and when you're done it will only be good for one database and operating system.
I'd have to ask what made you so certain that database calls were the bottleneck in your app. For the typical Web app, a reasonably well written persistence layer will be fast enough. There's other network latency in the system, and UI response can be slow enough to keep up. Are you worried about high throughput to the database for a Web app? If so, you might be guilty of premature optimization.
Unless I was absolutely certain that the JDBC driver from my database vendor would not do the job, I'd write the app and then profile it to find out where the performance bottlenecks were. I wouldn't take this extreme step until I was certain that the driver was the problem and a custom version would fix it.
%

Ping from lower security interface to a higher

Hello,
I have a Cisco 5520 ASA firewall with a direct connection to a Checkpoint firewall. On the inside network of my ASA i have a server that needs to ping a server on the dmz on the Checkpoint and vice versa. So i have the correct routing and firewall rules on both devices.
I can successfully ping from my server on the INSIDE interface on the cisco asa to the server on the DMZ on Checkpoint but i cant ping in the other direction.
Q Is this because i am trying to go from a lower security interface on the asa to a higher one?
I cant be sure if the error is on my asa or the checkpoint because neither is showing anything in the logs?
Everything else on both firewalls is fine.
regards,
Kevin

Hi,
Its hard to tell what the actual problem is at the moment.
With regards to the "security-level" value, the situation is if the interface doesn't have an ACL configured on it then traffic sourced from networks behind it will be allowed to networks located behind interfaces of lower "security-level". If the source interface for the direction that is not working doesnt hold an ACL and has lower "security-level" than the destination interface then you will have to configure an interface ACL to allow this traffic.
Then again, the problem might be as simple as the server simply rejecting the ICMP Echo but allowing itself to ICMP Echo some remote destination and receive an Echo Reply for that. In other words, the server can ICMP remote hosts but wont accept ICMP Echo from remote hosts. It might reply to hosts on the directly connected network. So if there is no clear reason for the traffic to not go through I would consider checking the server software firewall.
It might also be that the working direction has been configured with Dynamic PAT and there is no correct translation for the other direction to enable sending ICMP to the server.
You can easily test the ASA configuration with the "packet-tracer" so that would be the first natural step to determening the reason of the problem or atleast narrowing it down.
packet-tracer input icmp 8 0
In the above command you would use the interface nameif behind which the ICMP Echo is coming from (8 0 = ICMP Echo). The source IP address is obvious. The destination IP address should be the NAT IP address of the server IF there is NAT being performed. If NO NAT is done for the destination then you naturally use the real IP address.
Hope this helps
- Jouni

Low-Level NSURLConnection Question

I've been looking all over for about 3 days now, but I can't seem to find any way of making NSURLConnection connect from a specific interface--or even how to access the BSD socket object in order to do it myself. Is this even possible short of implementing my own NSURLConnection?

NSURLConnection is a high-level interface for people who don't want to have to deal with the low-level socket issues. For those details, look at the CFSocketCreate() function. From that, you can call CFStreamCreatePairWithSocket() which will give you some objects that can be cast into NSStream objects and used with higher-level APIs.

1.2 vindicates low-level noise removal clamor

So... the newly released Lr-1.2/ACR-4.2 proves that the claims raised in this Forum (and the ACR forum), re the low-level noise reduction issue must have been correct, as there has been a change in 1.2. Thanks Thomas! :)
I can see an improvement. The images lost that somewhat pixelated look the 1.1 output had.
At one point I agreed with Jeff that the problem was not an issue in print if the image was properly sharpened for print. But, nevertheless, my images on-screen look better now. So I look forward to doing soon some test prints (with proper sharpening) and I would not be surprised if they look even better in print. :)

Jeff,
Thanks for the note. Your mention of "... the next major upgrade may hold even more interesting changes..." is very encouraging. I am thankful and impressed with the quick fix that the ACR team (Thomas) managed to implement, without having to add controls to the user interface. It is very clear that the Camera Raw team does indeed listen to input and constructive criticism and I, for one, really do appreciate the efforts made to come up with the current compromise between the old and new algorithms.
For those who preferred the ACR v1.1 default NR processing, are you aware of what setting to use in the luminance NR slider in ACR v4.2/LR v1.2 which would be the closest match to the ACR v4.1/LR v1.1 zero setting?
With regards to (not) seeing these micro-detail / micro-smoothing issues in print, I recall that you made a point in a recent post somewhere, IIRC, of not being able to see these issues on 300-480 ppi prints on a 2880 dpi printer, and of course I agree 100% with that statement. What many of us have said though, is that when making a large print where the source file might drop down to 100-120 ppi, or that in combination with cropping, upsampling and sharpening, well that is where one could see the problems upon close examination of the final large print. In other words, where the print ppi begins to approach the ppi of an average computer monitor, that is when the issues became apparent and not, of course, on most smaller prints as you described.
In any case, seeing the improvements made by the Camera Raw team has certainly helped to reduce my anxiety levels a little... although family issues are still conspiring to keep them high. At least now I can be reasonably confident that I can continue on using that wonderful tool, "Lightroom"... :-)
Thanks again for your reasoned input and help trying to come to grips with this matter. I do hope that in my early frustrations with the last version of ACR/LR, I wasn't one of those people making unfair accusations...
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Question about CHKDSK ,S.M.A.R.T and low level format

hi,
I like to know the difference exactly between CHKDSK and S.M.A.R.T and low level format program(I know that low level format writes zero"s) I mean besides the low level format writes zero's what onother
benefits it has , it repairs some bad sectors or mark bad sectors ect?
very short explanation wil be enough.
thanks
johan
h.david

H.david
1-CHKDSK http://en.wikipedia.org/wiki/CHKDSK CHKDSK verifies the
file system integrity on
hard disks or
floppy disk and fixes logical file system errors.
2-S.M.A.R.T http://en.wikipedia.org/wiki/S.M.A.R.T. smart is a monitoring system for
computer
hard disk drives (HDDs) and
solid-state drives (SSDs)<sup class="reference" id="cite_ref-1">[1]</sup> to detect and report on various indicators of reliability, in the hope of anticipating failures.
3-Low level formatting http://en.wikipedia.org/wiki/Low_level_format
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Unable to create a folder in lower levels of root folder

It appears to me I cannot create a new folder in the lower levels of root folder. Currently, I have to create a new folder right below root folder and then drag it to lower level folder. Why I can't do it in one go. Thanks!

Hi Ray. That is normal behavior for Snow Leopard now. The OS wants to reserve the root level for itself. Also, folders you create at the root level may not accurately reflect the correct permissions.
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http://www.apple.com/support/mac101/
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Issue in determining Low level codes

Hi Gurus,
We are having an issue running heuristics when running along with Temporary low level codes. We are in SCM 7.0 environment.
The SNP Heuristics jobs are failing with this message "Low-level code
not available for product XXXXXXX at location XXXX
Job cancelled after system exception ERROR_MESSAGE"
Also, the message in the job log for the product in was flagged for deletion and I am not too sure why is this being picked up for processing and then failing?
I tried using SDP relevance as '1' for the product flagged for deletion for testing purposes and then the program is not considering this SKU, but stopping at another SKU and also that SKU is flagged for deletion. But the flip side of using SDP relevance is that that setting is at global level andmay have issues where the SKU is active.
I have couple questions:
1) Is there a way for the program to skip the code which has an error and move forward instead of failing the job? and provide a spool with error codes.Also, to provide the LLC number for all the correct SKU's instead of failing at that point and not generating the LLC's?
2) Why is the program also considering the codes which are flagged for deletion which should not be the case?
Also, I tried another way of maintaining the codes in thevariant which are not flagged for deletion and tried running heuristics in the background but failed at a point and it gave a message stating Low-level code not available for product XXXXXXX at location XXXX, Job cancelled after system exception ERROR_MESSAGE
But the product which was displayed in the job log is an active SKU. I am not too sure why the job failed with this error?
I tried running that individual SKU in the background including the temporary determination of LLC, it was successful. I am not too sure why it failed when it was a part of selection?
Any suggestions, would really help us a lot.
Thanks and regards,
Murali

Hi Datta - Thanks for the replies. I was able to have a workaround by using selection profiles excluding the Procurement type 'P' and it worked.
At our client, whenever a product is made 'non-X0' in ECC, procurement type is set to 'P' and by excluding that piece in the variant I was able to continue with my processing.
But still, don't you think the products which are flagged for deletion shouldn't be picked up heuristics?
Thanks and regards,
Murali

Collective Planned orders Scheduling for lower level orders with reference to the Superior order

Hi All,
Collective planned order scheduling.
I have been trying to reschedule the superior planned order and i was expecting the lower level planned orders to reschedule based on the superior planned order.
My problem is
when i try to reschedule the superior planned order the system is not rescheduling the lower level planned orders.
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Could some one tell me why this is not happenning at planned order level.
As the rescheduling of collective order will work at production order level but for some reason it is not happening at planned order level(as there is no option available to do so).
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Mahee.

Hello Mahee
Please observe that your system is working as designed. Planned orders are scheduled independently, even when they are part of a network/collective order. Note 152319 explains the planned order scheduling in detail and it provides the following information:
* No scheduling of overall networks is executed although a directly manufactured component is assigned.
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How to disable Wifi and Network access in low level setting for security ?

Hi
New to here
One of our final customer bought imac last months. OS 10.9, SN is c02*******J4i
Since they are security printing, all the necessary ports accessing to outisdes need to be disabled in low level setting(not the ons just like turn on and off ).
The ports including USB storage, Network and WIFI.
I googled and found the following
Open the /System/Library/Extensions folder.
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Choose Finder > Secure Empty Trash to delete the file.
Restart the system.
I want to confirm this before sending to final user. Since I didn't have mac on hand, just wonder whether there are similar kext files for network and wifi to remove.
Just like step 2 described.
I would like customer to backup these files before permanently removed.
Many thanks
Kevin
<Edited By Host>

chiqui wrote:
Is it possible to disable Internet access point and WAP as when I use WiFi some connections to WAP server of my provider are still made and I get charged. I am looking for the option not to delete it entirely from the access point list, but rather disable it as I might need connection when WiFi is not available and I want to be able to enable it as once I delete the server name and setting I won't know it.
Is it possible to do it and how?
You could delete WAP accesspoint. Not all providers (carriers) allow this.
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Drive Partition and Format
1. Open Disk Utility in your Utilities folder.
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I have Ps CS4. I run Apple OS X 10.9.5 on a new MacPro 3GHz 8-core Intel Xeon E5 - 64 GB.    I hardly ever use CS4 ( preferring Elements for my low level needs), but I now want to use it's function for stitching together a landscape. I fire it up and g

I have Ps CS4. I run Apple OS X 10.9.5 on a new MacPro 3GHz 8-core Intel Xeon E5 - 64 GB.    I hardly ever use CS4 ( preferring Elements for my low level needs), but I now want to use it's function for stitching together a landscape. I fire it up and get Error 150:30 with the suggestion to contact you - hence this message

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High level & low level Desing in OBIEE

Hi Gurus/Experts,
I am new to in OBIEE and please let me know about the High Level and Low level design of obiee projects.
Really its helpful for me to develope my carrier skills.
Thanks in advance,
Sriram

Hi,
OBIEE 11g Basic Security Guide from Deliver BI
http://www.box.net/shared/5ef1alb2sp
http://www.rittmanmead.com/2008/04/migration-obiee-projects-between-dev-and-prod-environments/
http://obiee101.blogspot.com/2009/07/obiee-how-to-get-started.html
http://www.scribd.com/doc/60264784/OBIEE11g-Logical-Table-Souorce
tutorial from the Oracle By Example range
http://st-curriculum.oracle.com/obe/fmw/bi/bi1113/createanalysis/ps.htm
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OBIEE10 repository and webcatlouge in obiee 11g
http://www.rittmanmead.com/2010/08/oracle-bi-ee-11g-upgrading-from-bi-ee-10g-repository-web-catalog/
new features OBIEE 11g is having
http://obieeelegant.blogspot.com/2011/10/obiee11g-features.html
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Top5 New Features in Oracle Business Intelligence Security
http://oracleintelligence.blogspot.com/2010/10/top5-new-features-in-oracle-business.html
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http://oracleintelligence.blogspot.com/2010/10/top5-new-features-for-oracle-business.html
Top10 New Features for Oracle Business Intelligence Users
http://oracleintelligence.blogspot.com/2010/10/top10-new-features-for-oracle-business.html
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http://obieeelegant.blogspot.com/2011/11/list-of-bug-fixes-included-in-obiee.html
OBIEE 11g (11.1.1.5.0) Software Only Installation on Windows Server 2008/2003/XP 64 bit SP1 &SP2
http://obieeelegant.blogspot.com/2011/09/obiee-11g-111150-software-only.html
Migrating Application Roles from Dev to UAT server and Production server.
To move Application Roles, please kindly review the following information:
Oracle Fusion Middleware Application Security Guide 11g Release 1 (11.1.1)
7.3.2 Migrating Policies with the Command migrateSecurityStorehttp://download.oracle.com/docs/cd/E14571_01/core.1111/e10043/cfgauthr.htm#JISEC2929
http://www.rittmanmead.com/2010/10/obiee-11gr1-security-explained-working-with-the-default-security-configuration/
http://www.rittmanmead.com/2011/04/oracle-bi-ee-11g-migrating-security-credential-store-part-3/
The same guide can be used...But some fetures are changed in it.Here is the RPD 11g step-by-step guide
http://www.oracle.com/webfolder/technetwork/tutorials/obe/fmw/bi/bi11115/biadmin11g_02/biadmin11g.htm
Refer:
Re: OBIEE 11G Beginners guide
Thanks
Deva

Low level interfaces to JVM

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