Sample Implementation of IEntryProcessor Interface

Implement the interface IEntryProcessor and provide implementation for ProcessEntry() method.

Member Description

Member	Description
`ProcessEntry(IMutableEntry, params [])`	This method will contain the logic to be executed over the cache item(s) on the server side. It takes in an instance of `IMutableEntry` and an array of parameters. The class implementing the `IMutableEntry` is `NCacheMutableEntry`, which provides the following flags: IsAvailableInCache IsUpdated IsRemoved For example, if the entry is updated in the method and you wish to save the mutated value in the cache, you can initialize `Value()` with the new value. Else, if you only wish to get the result and not update it, you should not tamper with the `IMutableEntry` flags.
`IgnoreLock()`	In case an entry is locked by an application and you wish to run the `EntryProcessor` over it, you can use this method to ignore the lock and access the entry to execute your method.

ProcessEntry(IMutableEntry, params [])

This method will contain the logic to be executed over the cache item(s) on the server side. It takes in an instance of IMutableEntry and an array of parameters. The class implementing the IMutableEntry is NCacheMutableEntry, which provides the following flags:

IsAvailableInCache

IsUpdated

IsRemoved

For example, if the entry is updated in the method and you wish to save the mutated value in the cache, you can initialize Value() with the new value. Else, if you only wish to get the result and not update it, you should not tamper with the IMutableEntry flags.

IgnoreLock() In case an entry is locked by an application and you wish to run the EntryProcessor over it, you can use this method to ignore the lock and access the entry to execute your method.

The following example implements the IEntryProcessor interface in CustomEntryProcessor class, the keys of entries in the cache are assumed to be of integer (int) type in .NET.

To utilize the IEntryProcessor interface, include the following namespace in your application: Alachisoft.NCache.Runtime.Processor.EntryProcessor.

[Serializable]
public class CustomEntryProcessor : IEntryProcessor
{
    public bool IgnoreLock()
    {
        return true;
    }

    public object ProcessEntry(IMutableEntry entry, params object[] arguments)
    {
        if (entry.Key.Equals("1"))
        {
            if (entry.Exists())
            {
                entry.Remove();
                return 0;
            }
            else
            {
                entry.Remove();
                return -1;
            }
        }
        else if (entry.Equals("15"))
        {
            object v = "Greater Than 10";
            entry.Value = v;
            return v;
        }
        return 1;
    }
}

Sample Implementation of IEntryProcessor Interface

See Also