Databases
StackOverflow2013
Postsdbo
POUsing Named Mutex
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POUsing Named Mutex
    primarykey
    data
    text
    <p>I have two instances running of same Windows Service. They check the health of each other and report if any issue is found. I have a critical job that needs to be performed so I am running it with a fail-over approach, it runs in Master, and if Master is not responding it runs in slave. This job needs to communicate over a specific serial port, I am trying to use Mutex to check for race condition. I dont have access to production, so before deploying I want to make sure my approach is fine. So please suggest if my use of Mutex is fine for the given case.</p> <pre><code>if (iAmRunningInSlave) { HealthClient hc = new HealthClient(); if (!hc.CheckHealthOfMaster()) return this.runJobWrapper(withMutex, iAmRunningInSlave); else return true; //master is ok, we dont need to run the job in slave } return this.runJobWrapper(withMutex, iAmRunningInSlave); </code></pre> <p>And then in runJobWrapper</p> <pre><code>bool runJobWrapper(bool withMutex, bool iAmRunningInSlave) { if (!withMutex) return this.runJob(iAmRunningInSlave); //the job might be interested to know Mutex mutex = null; string mutexName = this.jobCategory + "-" + this.jobTitle; //this will be unique for given job try { mutex = Mutex.OpenExisting(mutexName); return false; //mutex is with peer, return false which will re-trigger slave } catch { try { //mean time mutex might have created, so wrapping in try/catch mutex = new Mutex(true /*initiallyOwned*/, mutexName); return this.runJob(iAmRunningInSlave); //the job might be interested to know where I am running } finally { if (null!=mutex) mutex.ReleaseMutex(); } return false; } } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USKhurram Aziz
    1. USKhurram Aziz
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POUsing Named Mutex
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload