US 10,706,051 B1Granted

Methods for updating reference count and shared objects in a concurrent system

AssigneeOpen Text Corporation

InventorsShu-Shang Sam Wei, Shuaib Hasan Khwaja, Pankaj Pradhan

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Abstract

A method for referencing and updating objects in a shared resource environment. A reference counter counts is incremented for every use of an object subtype in a session and decremented for every release of an object subtype in a session. A session counter is incremented upon the first instance of fetching an object type into a session cache and decremented upon having no instances of the object type in use in the session. When both the reference counter and the session counter are zero, the object type may be removed from the cache. When the object type needs to be updated, it is cloned into a local cache, and changes are made on the local copy. The global cache is then locked to all other users, the original object type is detached, and the cloned object type is swapped into the global cache, after which the global cache in unlocked.

Claims21

Dependent claims

A method for controlling update access to an object type in a distributed computing environment, wherein the object type resides in a global cache managed by a content server, and wherein a plurality of clients have concurrent access to the global cache, comprising:

receiving a request from a client to make changes to an object type existing in the global cache, the object type having a type definition that defines a first set of properties with values that describe individual objects of a same type stored in a repository, the individual objects instantiated using the type definition of the object type as a template for instantiation;
cloning the unlocked, existing object type from the global cache and saving the cloned object type to a session cache being used for a single session, wherein the cloned object type has the same type definition as the unlocked, existing object type in the global cache;
making changes to the type definition of the cloned object type in the session cache while the existing object type in the global cache remains unlocked;
in response to completing the changes to the type definition of the cloned object type in the session cache, locking the existing object type in the global cache so that another client is blocked from accessing the existing object type in the global cache;
detaching the existing object type from the global cache;
saving the cloned object type having the changed type definition from the session cache into the global cache, the saving comprising replacing the existing object type with the cloned object type having the changed type definition;
and
unlocking the replaced object type in the global cache so that the other client is not blocked from accessing the replaced object type in the global cache.

5 more elements

A non-transitory computer-readable storage medium encoded with executable instructions for performing a method for controlling update access to an object type in a distributed computing environment, wherein the object type resides in a global cache managed by a content server, and wherein a plurality of clients have concurrent access to the global cache, the instructions comprising instructions for:

receiving a request from a client to make changes to an existing object type stored in the global cache, the object type having a type definition that defines a first set of properties with values that describe individual objects of a same type stored in a repository, the individual objects instantiated using the type definition of the object type as a template for instantiation;
cloning the unlocked, existing object type from the global cache and saving the cloned object type to a session cache being used for a single session, wherein the cloned object type has the same type definition as the unlocked, existing object type in the global cache;
making changes to the type definition of the cloned object type in the session cache while the existing object type in the global cache remains unlocked;
in response to completing the changes to the type definition of the cloned object type in the session cache, locking the existing object type in the global cache so that another client is blocked from accessing the existing object type in the global cache;
detaching the existing object type from the global cache;
saving the cloned object type having the changed type definition from the session cache into the global cache, the saving comprising replacing the existing object type with the cloned object type having the changed type definition;
and
unlocking the replaced object type in the global cache so that the other client is not blocked from accessing the replaced object type in the global cache.

5 more elements

A content management system for controlling update access to an object type in a distributed computing environment, wherein the object type resides in a global cache managed by a content server, and wherein a plurality of clients have concurrent access to the global cache, comprising:

a repository having access and storage operations controlled by at least one content server;
and
the content server including a content management framework for integrated operation with the repository, and configured to perform the following steps:
receiving a request from a client to make changes to an existing object type stored in the global cache, the object type having a type definition that defines a first set of properties with values that describe individual objects of a same type stored in the repository, the individual objects instantiated using the type definition of the object type as a template for instantiation;
cloning the unlocked, existing object type from the global cache and saving the cloned object type to a session cache being used for a single session, wherein the cloned object type has the same type definition as the unlocked, existing object type in the global cache;
making changes to the type definition of the cloned object type in the session cache while the existing object type in the global cache remains unlocked;
in response to completing the changes to the type definition of the cloned object type in the session cache, locking the existing object type in the global cache so that another client is blocked from accessing the existing object type in the global cache;
detaching the existing object type from the global cache;
saving the cloned object type having the changed type definition from the session cache into the global cache, the saving comprising replacing the existing object type with the cloned object type having the changed type definition;
and
unlocking the replaced object type in the global cache so that the other client is not blocked from accessing the replaced object type in the global cache.

8 more elements

Dependencies are inferred from the claim text.