0003464: distributed locking

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Category

Severity

Reproducibility

Date Submitted

Last Update

0003464

[Resin]

minor

always

04-28-09 09:15

08-20-09 21:05

Reporter

ferg

View Status

public

Assigned To

ferg

Priority

normal

Resolution

fixed

Platform

Status

closed

Projection

none

OS Version

ETA

none

Fixed in Version

4.0.2

Product Version

Product Build

Summary

0003464: distributed locking

Description

(rep by Martin Thompson)

The semantics I'm looking for would be similar to the following code.

    public void onLoad()
        throws InterruptedException
    {
        final java.util.concurrent.locks.Lock distributedMasterLock = resinServer.getOrCreateLock("ev-master");

        if (distributedMasterLock.tryLock())
        {
            try
            {
                promoteToMaster(); // blocking
            }
            finally
            {
                distributedMasterLock.unlock();
            }
        }
        else
        {
            startSecondaryBackgroundProcesses(); // non-blocking
            distributedMasterLock.lockInterruptibly();
            try
            {
                promoteToMaster();
            }
            finally
            {
                distributedMasterLock.unlock();
            }
        }
    }

Ideally the locking implementation fits the standard Lock interface and offers semantics like the above. For the secondary waiting on the lock it would be necessary that it aquires the lock almost instantly after the master has released it because of calling unlock or if it dies and just goes away without calling unlock.

Steps To Reproduce

Additional Information

Attached Files

Relationships

Notes
(0004132) ferg 08-20-09 21:05	server/69--

Issue History
Date Modified	Username	Field	Change
04-28-09 09:15	ferg	New Issue
08-20-09 21:05	ferg	Note Added: 0004132
08-20-09 21:05	ferg	Assigned To	=> ferg
08-20-09 21:05	ferg	Status	new => closed
08-20-09 21:05	ferg	Resolution	open => fixed
08-20-09 21:05	ferg	Fixed in Version	=> 4.0.2

Mantis 1.0.0rc3[^]

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