App::ResourceLocker - Interface for locking shared resources

    use App;

    $context = App->context();
    $srs = $context->service("ResourceLocker");  # or ...
    $srs = $context->shared_resource_set();

A ResourceLocker service represents a collection of "advisory" (or "cooperative") resource locks.

The following classes might be a part of the ResourceLocker Class Group.

* Class: App::ResourceLocker

* Class: App::ResourceLocker::IPCLocker

* Class: App::ResourceLocker::IPCSemaphore

* Class: App::ResourceLocker::BerkeleyDB

A ResourceLocker service represents a collection of "advisory" (or "cooperative") resource locks. These can be used to synchronize access to and modification of shared resources such as are stored in a SharedDatastore.

 * Throws: App::Exception::ResourceLocker
 * Since:  0.01

The constructor is inherited from App::Service|App::Service/"new()".

    * Signature: $resource_name = $srs->lock($resource_pool);
    * Signature: $resource_name = $srs->lock($named);
    * Param:     $resource_pool          string
    * Param:     resourcePool            string
    * Param:     nonBlocking             boolean
    * Param:     nonExclusive            boolean
    * Param:     maxWaitTimeMS           integer
    * Return:    $resource_name          string
    * Throws:    App::Exception::ResourceLocker
    * Since:     0.01

    Sample Usage: 

    $context = App->context();
    $srs = $context->service("ResourceLocker");
    $srs->lock("shmem01");

The lock() method on a ResourceLocker is for the purposes of cooperative resource locking.

    * Signature: $srs->unlock($resource_name);
    * Param:     $resource_name          string
    * Return:    void
    * Throws:    App::Exception::ResourceLocker
    * Since:     0.01

    Sample Usage: 

    $context = App->context();
    $srs = $context->service("ResourceLocker");
    $srs->unlock("shmem01");

Returns 'ResourceLocker';

    * Signature: $service_type = App::ResourceLocker->service_type();
    * Param:     void
    * Return:    $service_type  string
    * Since:     0.01

    $service_type = $rlock->service_type();

 * Author:  Stephen Adkins <spadkins@gmail.com>
 * License: This is free software. It is licensed under the same terms as Perl itself.

App::Context|App::Context, App::Service|App::Service