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• BPM ADF Task forms. Checking whether the current user is in a BPM Swimlane

  - by Christopher Karl Chan

  So this blog will focus on BPM Swimlane roles and users from a ADF context.So we have an ADF Task Details Form and we are in the process of making it richer and dynamic in functionality. A common requirement could be to dynamically show different areas based on the user logged into the workspace. Perhaps even we want to know even what swim-lane role the user belongs to.It is is a little bit harder to achieve then one thinks unless you know the trick. [Read More]

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• How to get Messages Pending Count from a Queue using WLST?

  - by lmestre

  WLST is a scripting Language that helps to achieve similar functionality as the ones you have in WebLogic console, but in a command line fashion.You can develop your WLST Scripts using Eclipse OEPE, read more here:https://blogs.oracle.com/oepe/entry/new_oracle_enterprise_pack_forFinally, here is an example to get Messages Pending Count using WLST: . ./setDomainEnv.sh java weblogic.WLST connect('weblogic','welcome1','t3://localhost:7001') domainRuntime() jms= getMBean ('ServerRuntimes/MyManagedServer/JMSRuntime/MyManagedServer.jms/JMSServers/MyJMSServer/Destinations/MyModule!MyQueue') jms.getMessagesPendingCount() Enjoy!WLST documentation:http://docs.oracle.com/middleware/1212/wls/WLSTG/index.html

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• How can I create a separate toolbar from the Task Bar?

  - by Iszi

  In Windows XP, you could separate toolbars from the Task Bar by dragging them to the desktop. They could then be left lying about anywhere on your screen or, my preferred option, docked to any side of the screen. I found this particularly useful to keep a handy list of common phone numbers quickly accessible. I'd create a new toolbar pointing to a custom folder, and put a bunch of dead shortcuts in the folder that had names and numbers as their file names. I'd then dock the toolbar to the left side, set it to auto-hide and always on top (options which could be set separate from the Task Bar as well) and it would be readily available no matter what else I was doing on my system. However, on my Windows 7 system, I seem unable to perform the crucial step of pulling the new toolbar off of the Task Bar. This is of course with the Task Bar "unlocked" so that I can move all my toolbars around. Is there something I'm missing here, or is this a feature that's been disabled in Windows 7? Is there any way to re-enable it, or otherwise achieve similar functionality? I'd rather be able to do this without additional software, if possible.

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• How do you manage private queue permissions on a windows server 2008 cluster?

  - by David

  On windows server 2003 there was an option to allow a resource to interact with the desktop, this allowed you to run computer management mmc snap-in on the virtual name of the cluster, allowing you to manage permissions of the private message queues on the cluster. Windows Server 2008 failover clustering has removed that checkbox, so applications can no longer interact with the desktop. My question is then how does one go about managing private queue permissions on the clustered (the virtual name) server?

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• Accessing Attributes in a Many-to-Many

  - by tshauck

  Hi, I have a rails app and I'd like to be able to do something like task.labels.first.label_name to get the label name of a task. However, I get an undefined method label_name. I did a t = Task.first; t.labels.first.label_name in the console, and that worked so I'm not sure what's going on. Here's the models then the locations of the error: class Categorization < ActiveRecord::Base belongs_to :label belongs_to :task end class Label < ActiveRecord::Base attr_accessible :label_name has_many :categorizations has_many :tasks, :through => :categorizations end class Task < ActiveRecord::Base attr_accessible :task has_many :categorizations has_many :labels, :through => :categorizations end The error is in the index <% for task in @tasks %> <tr> <td><%= task.task %></td> <td><%= task.labels.first.label_name %></td> <td><%= link_to "Show", task %></td> <td><%= link_to "Edit", edit_task_path(task) %></td> <td><%= link_to "Destroy", task, :confirm => 'Are you sure?', :method => :delete %></td> </tr> <% end %

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• How do I wait for all other threads to finish their tasks?

  - by Mike

  I have several threads consuming tasks from a queue using something similar to the code below. The problem is that there is one type of task which cannot run while any other tasks are being processed. Here is what I have: while (true) // Threaded code { while (true) { lock(locker) { if (close_thread) return; task = GetNextTask(); // Get the next task from the queue } if (task != null) break; wh.WaitOne(); // Wait until a task is added to the queue } task.Run(); } And this is kind of what I need: while (true) { while (true) { lock(locker) { if (close_thread) return; if (disable_new_tasks) { task = null; } else { task = GetNextTask(); } } if (task != null) break; wh.WaitOne(); } if(!task.IsThreadSafe()) { // I would set this to false inside task.Run() at // the end of the non-thread safe task disable_new_tasks = true; Wait_for_all_threads_to_finish_their_current_tasks(); } task.Run(); } The problem is I don't know how to achive this without creating a mess.

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• Mixing together Connect by, inner join and sum with Oracle

  - by François

  Hey there, I need help with a oracle query. Excuse me in advance for my english. Here is my setup: I have 2 tables called respectively "tasks" and "timesheets". The "tasks" table is a recursive one, that way each task can have multiple subtasks. Each timesheet is associated with a task (not necessarily the "root" task) and contains the number of hours worked on it. Example: Tasks id:1 | name: Task A | parent_id: NULL id:2 | name: Task A1 | parent_id: 1 id:3 | name: Task A1.1 | parent_id: 2 id:4 | name: Task B | parent_id: NULL id:5 | name: Task B1 | parent_id: 4 Timesheets id:1 | task_id: 1 | hours: 1 id:2 | task_id: 2 | hours: 3 id:3 | task_id:3 | hours: 1 id:5 | task_id:5 | hours:1 ... What I want to do: I want a query that will return the sum of all the hours worked on a "task hierarchy". If we take a look at the previous example, It means I would like to have the following results: task A - 5 hour(s) | task B - 1 hour(s) At first I tried this SELECT TaskName, Sum(Hours) "TotalHours" FROM ( SELECT replace(sys_connect_by_path(decode(level, 1, t.name), '~'), '~') As TaskName, ts.hours as hours FROM tasks t INNER JOIN timesheets ts ON t.id=ts.task_id START WITH PARENTOID=-1 CONNECT BY PRIOR t.id = t.parent_id ) GROUP BY TaskName Having Sum(Hours) > 0 ORDER BY TaskName And it almost work. THe only problem is that if there are no timesheet for a root task, it will skip the whole hieararchy... but there might be timesheets for the child rows and it is exactly what happens with Task B1. I know it is the "inner join" part that is causing my problem but I'm not sure how can I get rid of it. Any idea how to solve this problem? Thank you

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• Generating new tasks in a foreach loop

  - by Scott Chamberlain

  I know from the codeing guidlines that I have read you should not do for (int i = 0; i < 5; i++) { Task.Factory.StartNew(() => Console.WriteLine(i)); } Console.ReadLine(); as it will write 5 5's, I understand that and I think i understand why it is happening. I know the solution is just to do for (int i = 0; i < 5; i++) { int localI = i; Task.Factory.StartNew(() => Console.WriteLine(localI)); } Console.ReadLine(); However is something like this ok to do? Task currentTask = myFirstTask; currentTask.Start(); foreach (Task task in _TaskList) { currentTask.ContinueWith((antecendent) => { if(antecendent.IsCompleated) { task.Start(); } else //do error handling; }); currentTask = task; } } or do i need to do this? Task currentTask = myFirstTask; foreach (Task task in _TaskList) { Task localTask = task; currentTask.ContinueWith((antecendent) => { if(antecendent.IsCompleated) { localTask.Start(); } else //do error handling; }); currentTask = task; }

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• Server compromised. Bounce message contains many email addresses message was not sent to

  - by Tim Duncklee

  This is not a dupe. Please read and understand the issue before marking this as a duplicate question that has been answered already. Several customers are reporting bounce messages like the one below. At first I thought their computers had a virus but then I received one that was server generated so the problem is with the server. I've inspected the logs and these email addresses do not appear in the logs. The only thing I see that I do not remember seeing in the past are entries like this: Apr 30 13:34:49 psa86 qmail-queue-handlers[20994]: hook_dir = '/var/qmail//handlers/before-queue' Apr 30 13:34:49 psa86 qmail-queue-handlers[20994]: recipient[3] = '[email protected]' Apr 30 13:34:49 psa86 qmail-queue-handlers[20994]: handlers dir = '/var/qmail//handlers/before-queue/recipient/[email protected]' I've searched here and the web and maybe I'm just not entering the right search terms but I find nothing on this issue. Does anyone know how a hacker would attach additional email addresses to a message at the server and have them not appear in the logs? CentOS release 5.4, Plesk 8.6, QMail 1.03 Hi. This is the qmail-send program at psa.aaaaaa.com. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. <[email protected]>: 82.201.133.227 does not like recipient. Remote host said: 550 #5.1.0 Address rejected. Giving up on 82.201.133.227. <[email protected]>: 64.18.7.10 does not like recipient. Remote host said: 550 No such user - psmtp Giving up on 64.18.7.10. <[email protected]>: 173.194.68.27 does not like recipient. Remote host said: 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1 http://support.google.com/mail/bin/answer.py?answer=6596 w8si1903qag.18 - gsmtp Giving up on 173.194.68.27. <[email protected]>: 207.115.36.23 does not like recipient. Remote host said: 550 5.2.1 <[email protected]>... Addressee unknown, relay=[174.142.62.210] Giving up on 207.115.36.23. <[email protected]>: 207.115.37.22 does not like recipient. Remote host said: 550 5.2.1 <[email protected]>... Addressee unknown, relay=[174.142.62.210] Giving up on 207.115.37.22. <[email protected]>: 207.115.37.20 does not like recipient. Remote host said: 550 5.2.1 <[email protected]>... Addressee unknown, relay=[174.142.62.210] Giving up on 207.115.37.20. <[email protected]>: 207.115.37.23 does not like recipient. Remote host said: 550 5.2.1 <[email protected]>... Addressee unknown, relay=[174.142.62.210] Giving up on 207.115.37.23. <[email protected]>: 207.115.36.22 does not like recipient. Remote host said: 550 5.2.1 <[email protected]>... Addressee unknown, relay=[174.142.62.210] Giving up on 207.115.36.22. <[email protected]>: 74.205.16.140 does not like recipient. Remote host said: 553 sorry, that domain isn't in my list of allowed rcpthosts; no valid cert for gatewaying (#5.7.1) Giving up on 74.205.16.140. <[email protected]>: 207.115.36.20 does not like recipient. Remote host said: 550 5.2.1 <[email protected]>... Addressee unknown, relay=[174.142.62.210] Giving up on 207.115.36.20. <[email protected]>: 207.115.37.21 does not like recipient. Remote host said: 550 5.2.1 <[email protected]>... Addressee unknown, relay=[174.142.62.210] Giving up on 207.115.37.21. <[email protected]>: 192.169.41.23 failed after I sent the message. Remote host said: 554 qq Sorry, no valid recipients (#5.1.3) --- Below this line is a copy of the message. Return-Path: <[email protected]> Received: (qmail 15962 invoked from network); 1 May 2013 06:49:34 -0400 Received: from exprod6mo107.postini.com (64.18.1.18) by psa.aaaaaa.com with (DHE-RSA-AES256-SHA encrypted) SMTP; 1 May 2013 06:49:34 -0400 Received: from aaaaaa.com (exprod6lut001.postini.com [64.18.1.199]) by exprod6mo107.postini.com (Postfix) with SMTP id 47F80B8CA4 for <[email protected]>; Wed, 1 May 2013 03:49:33 -0700 (PDT) From: "Support" <[email protected]> To: [email protected] Subject: Detected Potential Junk Mail Date: Wed, 1 May 2013 03:49:33 -0700 Dear [email protected], junk mail protection service has detected suspicious email message(s) since your last visit and directed them to your Message Center. You can inspect your suspicious email at: ... UPDATE: After not seeing this problem for a while, I personally sent a message and immediately got a bounce with several bad addresses that I know I did not send to. These are addresses that are not on my system or on the server. This problem happens with both Mac and Windows clients and with messages generated from Postini and sent to users on my system. This is NOT backscatter. If it was backscatter it would not have the contents of my message in it. UPDATE #2 Here is another bounce. This one was sent by me and the bounce came back immediately. Hi. This is the qmail-send program at psa.aaaaaa.com. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. <[email protected]>: 71.74.56.227 does not like recipient. Remote host said: 550 5.1.1 <[email protected]>... User unknown Giving up on 71.74.56.227. <[email protected]>: Connected to 208.34.236.3 but sender was rejected. Remote host said: 550 5.7.1 This system is configured to reject mail from 174.142.62.210 [174.142.62.210] (Host blacklisted - Found on Realtime Black List server 'bl.mailspike.net') <[email protected]>: 66.96.80.22 failed after I sent the message. Remote host said: 552 sorry, mailbox [email protected] is over quota temporarily (#5.1.1) <[email protected]>: 83.145.109.52 does not like recipient. Remote host said: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table Giving up on 83.145.109.52. <[email protected]>: 69.49.101.234 does not like recipient. Remote host said: 550 5.7.1 <[email protected]>... H:M12 [174.142.62.210] Connection refused due to abuse. Please see http://mailspike.org/anubis/lookup.html or contact your E-mail provider. Giving up on 69.49.101.234. <[email protected]>: 212.55.154.36 does not like recipient. Remote host said: 550-The account has been suspended for inactivity 550 A conta do destinatario encontra-se suspensa por inactividade (#5.2.1) Giving up on 212.55.154.36. <[email protected]>: 199.168.90.102 failed after I sent the message. Remote host said: 552 Transaction [email protected] failed, remote said "550 No such user" (#5.1.1) <[email protected]>: 98.136.217.192 failed after I sent the message. Remote host said: 554 delivery error: dd Sorry your message to [email protected] cannot be delivered. This account has been disabled or discontinued [#102]. - mta1210.sbc.mail.gq1.yahoo.com --- Below this line is a copy of the message. Return-Path: <[email protected]> Received: (qmail 2618 invoked from network); 2 Jun 2013 22:32:51 -0400 Received: from 75-138-254-239.dhcp.jcsn.tn.charter.com (HELO ?192.168.0.66?) (75.138.254.239) by psa.aaaaaa.com with SMTP; 2 Jun 2013 22:32:48 -0400 User-Agent: Microsoft-Entourage/12.34.0.120813 Date: Sun, 02 Jun 2013 21:32:39 -0500 Subject: Refinance From: Tim Duncklee <[email protected]> To: Scott jones <[email protected]> Message-ID: <CDD16A79.67344%[email protected]> Thread-Topic: Reference Thread-Index: Ac5gAp2QmTs+LRv0SEOy7AJTX2DWzQ== Mime-version: 1.0 Content-type: multipart/mixed; boundary="B_3453053568_12034440" > This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. --B_3453053568_12034440 Content-type: multipart/related; boundary="B_3453053568_11982218" --B_3453053568_11982218 Content-type: multipart/alternative; boundary="B_3453053568_12000660" --B_3453053568_12000660 Content-type: text/plain; charset="ISO-8859-1" Content-transfer-encoding: quoted-printable Scott, ... email body here ... Here are the relevant log entries: Jun 2 22:32:50 psa qmail-queue[2616]: mail: all addreses are uncheckable - need to skip scanning (by deny mode) Jun 2 22:32:50 psa qmail-queue[2616]: scan: the message(drweb.tmp.i2SY0n) sent by [email protected] to [email protected] should be passed without checks, because contains uncheckable addresses Jun 2 22:32:50 psa qmail-queue-handlers[2617]: Handlers Filter before-queue for qmail started ... Jun 2 22:32:50 psa qmail-queue-handlers[2617]: [email protected] Jun 2 22:32:50 psa qmail-queue-handlers[2617]: [email protected] Jun 2 22:32:50 psa qmail-queue-handlers[2617]: hook_dir = '/var/qmail//handlers/before-queue' Jun 2 22:32:50 psa qmail-queue-handlers[2617]: recipient[3] = '[email protected]' Jun 2 22:32:50 psa qmail-queue-handlers[2617]: handlers dir = '/var/qmail//handlers/before-queue/recipient/[email protected]' Jun 2 22:32:51 psa qmail: 1370226771.060211 starting delivery 57: msg 1540285 to remote [email protected] Jun 2 22:32:51 psa qmail: 1370226771.060402 status: local 0/10 remote 1/20 Jun 2 22:32:51 psa qmail: 1370226771.060556 new msg 4915232 Jun 2 22:32:51 psa qmail: 1370226771.060671 info msg 4915232: bytes 687899 from <[email protected]> qp 2618 uid 2020 Jun 2 22:32:51 psa qmail-remote-handlers[2619]: Handlers Filter before-remote for qmail started ... Jun 2 22:32:51 psa qmail-queue-handlers[2617]: starter: submitter[2618] exited normally Jun 2 22:32:51 psa qmail-remote-handlers[2619]: from= Jun 2 22:32:51 psa qmail-remote-handlers[2619]: [email protected] Jun 2 22:32:51 psa qmail: 1370226771.078732 starting delivery 58: msg 4915232 to remote [email protected] Jun 2 22:32:51 psa qmail: 1370226771.078825 status: local 0/10 remote 2/20 Jun 2 22:32:51 psa qmail-remote-handlers[2621]: Handlers Filter before-remote for qmail started ... Jun 2 22:32:51 psa qmail-remote-handlers[2621]: [email protected] Jun 2 22:32:51 psa qmail-remote-handlers[2621]: [email protected]

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• schedule a task to run every day within a time range?

  - by barlop

  How do I schedule a task to run once any time within a time range? and also, just once in a day without specifying a time? can windows task scheduler do it? and specifically, if my computer is off or on standby or hibernation at the time I want it to run it when it is on if it hasn't been run that day and the time has passed. I see an option to wake it to run the task , but could I then put it back to sleep? And i'd like to be able to as mentioned.. let it run when the computer is back on.

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• How can I slightly delay the pop up of the task bar?

  - by Xavierjazz

  Windows XP SP3 Many times as I head to the bottom of my desktop, I will slightly overshoot the target at the bottom and the task bar will pop up, hiding the target. I then have to move the cursor out of it so it retreats and then again try to access the target. Is there a way to add an interval, say, 1 second, to the task bar popping up so I can adjust to the target before the task bar covers it? EDIT: as per my answer below, "What I ended up doing is just docking it on the LH side of the screen. There is no change in response but I don't go to that location so often so it's much better.".

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• How to open the built-in task manager when it's replaced by Process Explorer?

  - by AgreeOrNot

  I want to open the built-in task manager with Process Explorer's Replace Task Manager option checked. I've tried: Running taskmgr.exe from the run dialog. PE was opened instead. Creating a copy of taskmgr.exe in the same folder. Then run it. The built-in task manager was opened, but not working properly(its window was blank). Creating a symbolic link (using mklink) of taskmgr.exe in the same folder. Then run it. PE was opened instead. Is there any other method I can try? Thanks.

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• ?onemu: How do I make several console windows in one tab from task file?

  - by doom123

  How to make several console windows in one tab from task file? I want to make a grid 2x2 of consoles in one tab. I can do it by hands when create new consoles and select "To right" or "To bottom" options. But I want it to be created automatically on start up. Option "autosave/restore opened tasks" is unabled for some reason. So the only way is to create it in task. So, how can I create 2x2 grid in task?

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• Best approach for tracking dependent state

  - by Pace

  Let's pretend I work on a project tracking application. The application is a database backed, server hosted, web application. In this application there are Projects which have many Activities which have many Tasks. A Task has two date fields an originalDueDate and a projectedDueDate. In addition, there are dynamic fields on the Activities and the Projects which indicate whether the Activity or Project is behind schedule based on the projected due dates of the child tasks and various other variables such as remaining buffer time, etc. There are a number of things that can cause the projectedDueDate to change. For example, an employee working on the project may (via a server request) enter in a shipping delay. Alternatively, a site may (via a server request) enter in an unexpected closure. When any of these things occur I need to not only update the projectedDueDate of the Task but also trigger the corresponding Project and Activity to update as well. What is the best way to do this? I've thought of the observer pattern but I don't keep a single copy of all these objects in memory. When a request comes in, I query the Task in from the database, at that point there is no associated Activity in memory that would be a listener. I could remove the ability to query for Tasks and force the application to query first by Project, then by Activity (in context of Project), then by task (in context of Activity) adding the observer relationships at each step but I'm not sure if that is the best way. I could setup a database event listening system so when a Task modified event is dispatched I have a handler which queries for the Activity at that point. I could simply setup a two-way relationship between Task and Activity so that the Task knows about the parent Activity and when the Task updates his state the Task grabs his parent and updates state. Right now I'm stuck considering all the options and am wondering if any single approach (doesn't have to be a listed approach) is jumping out at others as the best approach.

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• Handling HumanTask attachments in Oracle BPM 11g PS4FP+ (I)

  - by ccasares

  Adding attachments to a HumanTask is a feature that exists in Oracle HWF (Human Workflow) since 10g. However, in 11g there have been many improvements on this feature and this entry will try to summarize them. Oracle BPM 11g 11.1.1.5.1 (aka PS4 Feature Pack or PS4FP) introduced two great features: Ability to link attachments at a Task scope or at a Process scope: "Task" attachments are only visible within the scope (lifetime) of a task. This means that, initially, any member of the assignment pattern of the Human Task will be able to handle (add, review or remove) attachments. However, once the task is completed, subsequent human tasks will not have access to them. This does not mean those attachments got lost. Once the human task is completed, attachments can be retrieved in order to, i.e., check them in to a Content Server or to inject them to a new and different human task. Aside note: a "re-initiated" human task will inherit comments and attachments, along with history and -optionally- payload. See here for more info. "Process" attachments are visible within the scope of the process. This means that subsequent human tasks in the same process instance will have access to them. Ability to use Oracle WebCenter Content (previously known as "Oracle UCM") as the backend for the attachments instead of using HWF database backend. This feature adds all content server document lifecycle capabilities to HWF attachments (versioning, RBAC, metadata management, etc). As of today, only Oracle WCC is supported. However, Oracle BPM Suite does include a license of Oracle WCC for the solely usage of document management within BPM scope. Here are some code samples that leverage the above features. Retrieving uploaded attachments -Non UCM- Non UCM attachments (default ones or those that have existed from 10g, and are stored "as-is" in HWK database backend) can be retrieved after the completion of the Human Task. Firstly, we need to know whether any attachment has been effectively uploaded to the human task. There are two ways to find it out: Through an XPath function: Checking the execData/attachment[] structure. For example: Once we are sure one ore more attachments were uploaded to the Human Task, we want to get them. In this example, by "get" I mean to get the attachment name and the payload of the file. Aside note: Oracle HWF lets you to upload two kind of [non-UCM] attachments: a desktop document and a Web URL. This example focuses just on the desktop document one. In order to "retrieve" an uploaded Web URL, you can get it directly from the execData/attachment[] structure. Attachment content (payload) is retrieved through the getTaskAttachmentContents() XPath function: This example shows how to retrieve as many attachments as those had been uploaded to the Human Task and write them to the server using the File Adapter service. The sample process excerpt is as follows:  A dummy UserTask using "HumanTask1" Human Task followed by a Embedded Subprocess that will retrieve the attachments (we're assuming at least one attachment is uploaded): and once retrieved, we will write each of them back to a file in the server using a File Adapter service: In detail: We've defined an XSD structure that will hold the attachments (both name and payload): Then, we can create a BusinessObject based on such element (attachmentCollection) and create a variable (named attachmentBPM) of such BusinessObject type. We will also need to keep a copy of the HumanTask output's execData structure. Therefore we need to create a variable of type TaskExecutionData... ...and copy the HumanTask output execData to it: Now we get into the embedded subprocess that will retrieve the attachments' payload. First, and using an XSLT transformation, we feed the attachmentBPM variable with the name of each attachment and setting an empty value to the payload: Please note that we're using the XSLT for-each node to create as many target structures as necessary. Also note that we're setting an Empty text to the payload variable. The reason for this is to make sure the <payload></payload> tag gets created. This is needed when we map the payload to the XML variable later. Aside note: We are assuming that we're retrieving non-UCM attachments. However in real life you might want to check the type of attachment you're handling. The execData/attachment[]/storageType contains the values "UCM" for UCM type attachments, "TASK" for non-UCM ones or "URL" for Web URL ones. Those values are part of the "Ext.Com.Oracle.Xmlns.Bpel.Workflow.Task.StorageTypeEnum" enumeration. Once we have fed the attachmentsBPM structure and so it now contains the name of each of the attachments, it is time to iterate through it and get the payload. Therefore we will use a new embedded subprocess of type MultiInstance, that will iterate over the attachmentsBPM/attachment[] element: In every iteration we will use a Script activity to map the corresponding payload element with the result of the XPath function getTaskAttachmentContents(). Please, note how the target array element is indexed with the loopCounter predefined variable, so that we make sure we're feeding the right element during the array iteration:  The XPath function used looks as follows: hwf:getTaskAttachmentContents(bpmn:getDataObject('UserTask1LocalExecData')/ns1:systemAttributes/ns1:taskId, bpmn:getDataObject('attachmentsBPM')/ns:attachment[bpmn:getActivityInstanceAttribute('SUBPROCESS3067107484296', 'loopCounter')]/ns:fileName)  where the input parameters are: taskId of the just completed Human Task attachment name we're retrieving the payload from array index (loopCounter predefined variable)  Aside note: The reason whereby we're iterating the execData/attachment[] structure through embedded subprocess and not, i.e., using XSLT and for-each nodes, is mostly because the getTaskAttachmentContents() XPath function is currently not available in XSLT mappings. So all this example might be considered as a workaround until this gets fixed/enhanced in future releases. Once this embedded subprocess ends, we will have all attachments (name + payload) in the attachmentsBPM variable, which is the main goal of this sample. But in order to test everything runs fine, we finish the sample writing each attachment to a file. To that end we include a final embedded subprocess to concurrently iterate through each attachmentsBPM/attachment[] element: On each iteration we will use a Service activity that invokes a File Adapter write service. In here we have two important parameters to set. First, the payload itself. The file adapter awaits binary data in base64 format (string). We have to map it using XPath (Simple mapping doesn't recognize a String as a base64-binary valid target):  Second, we must set the target filename using the Service Properties dialog box:  Again, note how we're making use of the loopCounter index variable to get the right element within the embedded subprocess iteration. Handling UCM attachments will be part of a different and upcoming blog entry. Once I finish will all posts on this matter, I will upload the whole sample project to java.net.

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• Tuxedo Load Balancing

  - by Todd Little

  A question I often receive is how does Tuxedo perform load balancing.  This is often asked by customers that see an imbalance in the number of requests handled by servers offering a specific service. First of all let me say that Tuxedo really does load or request optimization instead of load balancing.  What I mean by that is that Tuxedo doesn't attempt to ensure that all servers offering a specific service get the same number of requests, but instead attempts to ensure that requests are processed in the least amount of time.   Simple round robin "load balancing" can be employed to ensure that all servers for a particular service are given the same number of requests.  But the question I ask is, "to what benefit"?  Instead Tuxedo scans the queues (which may or may not correspond to servers based upon SSSQ - Single Server Single Queue or MSSQ - Multiple Server Single Queue) to determine on which queue a request should be placed.  The scan is always performed in the same order and during the scan if a queue is empty the request is immediately placed on that queue and request routing is done.  However, should all the queues be busy, meaning that requests are currently being processed, Tuxedo chooses the queue with the least amount of "work" queued to it where work is the sum of all the requests queued weighted by their "load" value as defined in the UBBCONFIG file.  What this means is that under light loads, only the first few queues (servers) process all the requests as an empty queue is often found before reaching the end of the scan.  Thus the first few servers in the queue handle most of the requests.  While this sounds non-optimal, in fact it capitalizes on the underlying operating systems and hardware behavior to produce the best possible performance.  Round Robin scheduling would spread the requests across all the available servers and thus require all of them to be in memory, and likely not share much in the way of hardware or memory caches.  Tuxedo's system maximizes the various caches and thus optimizes overall performance.  Hopefully this makes sense and now explains why you may see a few servers handling most of the requests.  Under heavy load, meaning enough load to keep all servers that can handle a request busy, you should see a relatively equal number of requests processed.  Next post I'll try and cover how this applies to servers in a clustered (MP) environment because the load balancing there is a little more complicated. Regards,Todd LittleOracle Tuxedo Chief Architect

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• More useful Sql Server Serivce Broker Queries

  - by ChrisD

  SELECT 'Checking Broker Service Status...' IF (select Top 1 is_broker_enabled from sys.databases where name = 'NWMESSAGE')=1     SELECT ' Broker Service IS Enabled'  -- Should return a 1. ELSE     SELECT '** Broker Service IS DISABLED ***' /* If Is_Broker_enabled returns 0, uncomment and run this code ALTER DATABASE NWMESSAGE SET SINGLE_USER WITH ROLLBACK IMMEDIATE GO Alter Database NWMESSAGE Set enable_broker GO ALTER DATABASE NWDataChannel SET MULTI_USER GO */ SELECT 'Checking For Disabled Queues....' -- ensure the queues are enabled --  0 indicates the queue is disabled. Select '** Receive Queue Disabled: '+name from sys.service_queues where is_receive_enabled = 0 --select [name], is_receive_enabled from sys.service_queues; /*If the queue is disabled, to enable it alter queue QUEUENAME with status=on; – replace QUEUENAME with the name of your queue */ -- Get General information about the queues --select * from sys.service_queues -- Get the message counts in each queue SELECT 'Checking Message Count for each Queue...' select q.name, p.rows from sys.objects as o join sys.partitions as p on p.object_id = o.object_id join sys.objects as q on o.parent_object_id = q.object_id join sys.service_queues sq on sq.name = q.name where p.index_id = 1 -- Ensure all the queue activiation sprocs are present SELECT 'Checking for Activation Stored Procedures....' SELECT  '** Missing Procedure:  '+q.name  From sys.service_queues q Where NOT Exists(Select * from sysobjects where xtype='p' and name='activation_'+q.name) and q.activation_procedure is not null DECLARE @sprocs Table (Name Varchar(2000)) Insert into @sprocs Values ('Echo') Insert into @sprocs Values ('HTTP_POST') Insert into @sprocs Values ('InitializeRecipients') Insert into @sprocs Values ('sp_EnableRecipient') Insert into @sprocs Values ('sp_ProcessReceivedMessage') Insert into @sprocs Values ('sp_SendXmlMessage') SELECT 'Checking for required stored procedures...' SELECT  '** Missing Procedure:  '+s.name  From @sprocs s Where NOT Exists(Select * from sysobjects where xtype='p' and name=s.name) GO -- Check the services Select 'Checking Recipient Message Services...' Select '** Missing Message Service:' + r.RecipientName +'MessageService' From Recipient r Where not exists (Select * from sys.services s where  s.name  COLLATE SQL_Latin1_General_CP1_CI_AS= r.RecipientName+'MessageService') DECLARE @svcs Table (Name Varchar(2000)) Insert into @svcs Values ('XmlMessageSendingService') SELECT  '** Missing Service:  '+s.name  From @svcs s Where NOT Exists(Select * from sys.services where name=s.name COLLATE SQL_Latin1_General_CP1_CI_AS) GO /*** To Test a message send Run: sp_SendXmlMessage  'TSQLTEST', 'CommerceEngine','<Root><Text>Test</Text></Root>' */ Select CAST(message_body as XML) as xml, * From XmlMessageSendingQueue /*** clean out all queues declare @handle uniqueidentifier declare conv cursor for   select conversation_handle from sys.conversation_endpoints open conv fetch next from conv into @handle while @@FETCH_STATUS = 0 Begin    END Conversation @handle with cleanup    fetch next from conv into @handle End close conv deallocate conv ***********************

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• SQL SERVER – LCK_M_XXX – Wait Type – Day 15 of 28

  - by pinaldave

  Locking is a mechanism used by the SQL Server Database Engine to synchronize access by multiple users to the same piece of data, at the same time. In simpler words, it maintains the integrity of data by protecting (or preventing) access to the database object. From Book On-Line: LCK_M_BU Occurs when a task is waiting to acquire a Bulk Update (BU) lock. LCK_M_IS Occurs when a task is waiting to acquire an Intent Shared (IS) lock. LCK_M_IU Occurs when a task is waiting to acquire an Intent Update (IU) lock. LCK_M_IX Occurs when a task is waiting to acquire an Intent Exclusive (IX) lock. LCK_M_S Occurs when a task is waiting to acquire a Shared lock. LCK_M_SCH_M Occurs when a task is waiting to acquire a Schema Modify lock. LCK_M_SCH_S Occurs when a task is waiting to acquire a Schema Share lock. LCK_M_SIU Occurs when a task is waiting to acquire a Shared With Intent Update lock. LCK_M_SIX Occurs when a task is waiting to acquire a Shared With Intent Exclusive lock. LCK_M_U Occurs when a task is waiting to acquire an Update lock. LCK_M_UIX Occurs when a task is waiting to acquire an Update With Intent Exclusive lock. LCK_M_X Occurs when a task is waiting to acquire an Exclusive lock. LCK_M_XXX Explanation: I think the explanation of this wait type is the simplest. When any task is waiting to acquire lock on any resource, this particular wait type occurs. The common reason for the task to be waiting to put lock on the resource is that the resource is already locked and some other operations may be going on within it. This wait also indicates that resources are not available or are occupied at the moment due to some reasons. There is a good chance that the waiting queries start to time out if this wait type is very high. Client application may degrade the performance as well. You can use various methods to find blocking queries: EXEC sp_who2 SQL SERVER – Quickest Way to Identify Blocking Query and Resolution – Dirty Solution DMV – sys.dm_tran_locks DMV – sys.dm_os_waiting_tasks Reducing LCK_M_XXX wait: Check the Explicit Transactions. If transactions are very long, this wait type can start building up because of other waiting transactions. Keep the transactions small. Serialization Isolation can build up this wait type. If that is an acceptable isolation for your business, this wait type may be natural. The default isolation of SQL Server is ‘Read Committed’. One of my clients has changed their isolation to “Read Uncommitted”. I strongly discourage the use of this because this will probably lead to having lots of dirty data in the database. Identify blocking queries mentioned using various methods described above, and then optimize them. Partition can be one of the options to consider because this will allow transactions to execute concurrently on different partitions. If there are runaway queries, use timeout. (Please discuss this solution with your database architect first as timeout can work against you). Check if there is no memory and IO-related issue using the following counters: Checking Memory Related Perfmon Counters SQLServer: Memory Manager\Memory Grants Pending (Consistent higher value than 0-2) SQLServer: Memory Manager\Memory Grants Outstanding (Consistent higher value, Benchmark) SQLServer: Buffer Manager\Buffer Hit Cache Ratio (Higher is better, greater than 90% for usually smooth running system) SQLServer: Buffer Manager\Page Life Expectancy (Consistent lower value than 300 seconds) Memory: Available Mbytes (Information only) Memory: Page Faults/sec (Benchmark only) Memory: Pages/sec (Benchmark only) Checking Disk Related Perfmon Counters Average Disk sec/Read (Consistent higher value than 4-8 millisecond is not good) Average Disk sec/Write (Consistent higher value than 4-8 millisecond is not good) Average Disk Read/Write Queue Length (Consistent higher value than benchmark is not good) Read all the post in the Wait Types and Queue series. Note: The information presented here is from my experience and there is no way that I claim it to be accurate. I suggest reading Book OnLine for further clarification. All the discussion of Wait Stats in this blog is generic and varies from system to system. It is recommended that you test this on a development server before implementing it to a production server. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQL Wait Stats, SQL Wait Types, T SQL, Technology

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• How do I run a rake task from Capistrano?

  - by Richard Poirier

  I already have a deploy.rb that can deploy my app on my production server. My app contains a custom rake task (a .rake file in the lib/tasks directory). I'd like to create a cap task that will remotely run that rake task.

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• How do I start IRB console from a rake task?

  - by Michael Lang

  I'm trying to write a rake task that will set up an environment mirroring my project. task :environment do require 'rubygems' require 'sequel' # require 'my_projects_special_files' end task :foo => [:environment] do require 'irb' IRB.start end Leads to irb complaining that "foo" doesn't exist (the name of the task) 10:28:01:irb_test rake foo --trace (in /Users/mwlang/projects/personal/rake/irb_test) ** Invoke foo (first_time) ** Invoke environment (first_time) ** Execute environment ** Execute foo rake aborted! No such file or directory - foo /opt/local/lib/ruby/1.8/irb/input-method.rb:68:in `initialize' /opt/local/lib/ruby/1.8/irb/input-method.rb:68:in `open' /opt/local/lib/ruby/1.8/irb/input-method.rb:68:in `initialize' /opt/local/lib/ruby/1.8/irb/context.rb:80:in `new' /opt/local/lib/ruby/1.8/irb/context.rb:80:in `initialize' /opt/local/lib/ruby/1.8/irb.rb:92:in `new' /opt/local/lib/ruby/1.8/irb.rb:92:in `initialize' /opt/local/lib/ruby/1.8/irb.rb:57:in `new' /opt/local/lib/ruby/1.8/irb.rb:57:in `start' /Users/mwlang/projects/personal/rake/irb_test/Rakefile:9

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• Tab Sweep: Logging, WebSocket, NoSQL, Vaadin, RESTful, Task Scheduling, Environment Entries, ...

  - by arungupta

  Recent Tips and News on Java, Java EE 6, GlassFish & more : • Detailed Logging Output with GlassFish Server, Hibernate, and Log4j (wikis.oracle.com) • Serving Static Content on WebLogic and GlassFish (Colm Divilly) • Java EE and communication between applications (Martin Crosnier) • What are the new features in Java EE 6? (jguru) • Standardizing JPA for NoSQL: are we there yet? (Emmanuel) • Create an Asynchronous JAX-WS Web Service and call it from Oracle BPEL 11g (Bob) • Programmatic Login to Vaadin application with JAAS utilizing JavaEE6 features and Spring injection (vaadin) • Is in an EJB injected EntityManager thread-safe? (Adam Bien) • Websocket using Glassfish (demj33) • Designing and Testing RESTful web services [ UML, REST CLIENT ] (Mamadou Lamine Ba) • Glassfish hosting -Revion.com Glassfish Oracle hosting (revion.com) • Task Scheduling in Java EE 6 on GlassFish using the Timer Service (Micha Kops) • JEE 6 Environmental Enterprise Entries and Glassfish (Slim Ouertani) • Top 10 Causes of Java EE Enterprise Performance Problems (Pierre - Hugues Charbonneau)

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• Task Management - How important it is for a entry level developer?

  - by Naveen Kumar

  I hold masters in CS & now I'm mobile apps developer (Entry Level) , I always start to plan things when starting or doing any project both at work & projects i do at Home (for passion) - as I can deliver the project on time but sometimes i m running out of time like 10 tasks a day vs my time forecast will take 2 on that day? As I'm beginner level, I want your suggestions on How important is Task Management for a person like me & for achieving my goals? My target for the next 3 year will be a Project Manager or Similiar Role - i belive which these time managing skills will be a needed quality.

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• SSIS - How do I use a resultset as input in a SQL task and get data types right?

  - by thursdaysgeek

  I am trying to merge records from an Oracle database table to my local SQL table. I have a variable for the package that is an Object, called OWell. I have a data flow task that gets the Oracle data as a SQL statment (select well_id, well_name from OWell order by Well_ID), and then a conversion task to convert well_id from a DT_STR of length 15 to a DT_WSTR; and convert well_name from a DT_STR of length 15 to DT_WSTR of length 50. That is then stored in the recordset OWell. The reason for the conversions is the table that I want to add records to has an identity field: SSIS shows well_id as a DT_WSTR of length 15, well_name a DT_WSTR of length 50. I then have a SQL task that connects to the local database and attempts to add records that are not there yet. I've tried various things: using the OWell as a result set and referring to it in my SQL statement. Currently, I have the ResultSet set to None, and the following SQL statment: Insert into WELL (WELL_ID, WELL_NAME) Select OWELL_ID, OWELL_NAME from OWell where OWELL_ID not in (select WELL.WELL_ID from WELL) For Parameter Mapping, I have Paramater 0, called OWell_ID, from my variable User::OWell. Parameter 1, called OWell_Name is from the same variable. Both are set to VARCHAR, although I've also tried NVARCHAR. I do not have a Result set. I am getting the following error: Error: 0xC002F210 at Insert records to FLEDG, Execute SQL Task: Executing the query "Insert into WELL (WELL_ID, WELL_NAME) Select OWELL..." failed with the following error: "An error occurred while extracting the result into a variable of type (DBTYPE_STR)". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly. I don't think it's a data type issue, but rather that I somehow am not using the resultset properly. How, exactly, am I supposed to refer to that recordset in my SQL task, so that I can use the two recordset fields and add records that are missing?

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• How to display the properties of a Scheduled Task?

  - by TooFat

  I have C# app that uses a Form to set a bunch of settings. Those settings can be read by a Console App so it can run via the built in Windows Task Scheduler. I would like to be able to simply open up a scheduled task as if I had just opened it from the gui in Windows so the user can set all the settings for the scheduled task. I know I can use a library like http://www.codeproject.com/KB/cs/tsnewlib.aspx but I would rather not have to recreate all the options in a WinForm when everything is already available in Windows. Does anyone know how I can programattically display the built in Windows Task Scheduler from C#?

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• await, WhenAll, WaitAll, oh my!!

  - by cibrax

  If you are dealing with asynchronous work in .NET, you might know that the Task class has become the main driver for wrapping asynchronous calls. Although this class was officially introduced in .NET 4.0, the programming model for consuming tasks was much more simplified in C# 5.0 in .NET 4.5 with the addition of the new async/await keywords. In a nutshell, you can use these keywords to make asynchronous calls as if they were sequential, and avoiding in that way any fork or callback in the code. The compiler takes care of the rest. I was yesterday writing some code for making multiple asynchronous calls to backend services in parallel. The code looked as follow, var allResults = new List<Result>(); foreach(var provider in providers) { var results = await provider.GetResults(); allResults.AddRange(results); } return allResults; You see, I was using the await keyword to make multiple calls in parallel. Something I did not consider was the overhead this code implied after being compiled. I started an interesting discussion with some smart folks in twitter. One of them, Tugberk Ugurlu, had the brilliant idea of actually write some code to make a performance comparison with another approach using Task.WhenAll. There are two additional methods you can use to wait for the results of multiple calls in parallel, WhenAll and WaitAll. WhenAll creates a new task and waits for results in that new task, so it does not block the calling thread. WaitAll, on the other hand, blocks the calling thread. This is the code Tugberk initially wrote, and I modified afterwards to also show the results of WaitAll. class Program { private static Func<Stopwatch, Task>[] funcs = new Func<Stopwatch, Task>[] { async (watch) => { watch.Start(); await Task.Delay(1000); Console.WriteLine("1000 one has been completed."); }, async (watch) => { await Task.Delay(1500); Console.WriteLine("1500 one has been completed."); }, async (watch) => { await Task.Delay(2000); Console.WriteLine("2000 one has been completed."); watch.Stop(); Console.WriteLine(watch.ElapsedMilliseconds + "ms has been elapsed."); } }; static void Main(string[] args) { Console.WriteLine("Await in loop work starts..."); DoWorkAsync().ContinueWith(task => { Console.WriteLine("Parallel work starts..."); DoWorkInParallelAsync().ContinueWith(t => { Console.WriteLine("WaitAll work starts..."); WaitForAll(); }); }); Console.ReadLine(); } static async Task DoWorkAsync() { Stopwatch watch = new Stopwatch(); foreach (var func in funcs) { await func(watch); } } static async Task DoWorkInParallelAsync() { Stopwatch watch = new Stopwatch(); await Task.WhenAll(funcs[0](watch), funcs[1](watch), funcs[2](watch)); } static void WaitForAll() { Stopwatch watch = new Stopwatch(); Task.WaitAll(funcs[0](watch), funcs[1](watch), funcs[2](watch)); } } After running this code, the results were very concluding. Await in loop work starts... 1000 one has been completed. 1500 one has been completed. 2000 one has been completed. 4532ms has been elapsed. Parallel work starts... 1000 one has been completed. 1500 one has been completed. 2000 one has been completed. 2007ms has been elapsed. WaitAll work starts... 1000 one has been completed. 1500 one has been completed. 2000 one has been completed. 2009ms has been elapsed. The await keyword in a loop does not really make the calls in parallel.

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