FilePersistence<T>

Inherits: MemoryPersistence

Description

The FilePersistence class allows you to create persistence components that store data in flat files and chache them in memory.

Important points

• This is the most basic persistence component that is only able to store data items of any type.
• Specific CRUD operations over the data items must be implemented in child classes by accessing the self._items property and calling the save method.

Configuration parameters

• path: path to the file where data is stored

References

• *:logger:*:*:1.0 - (optional) ILogger components to pass log messages

Constructors

Creates a new instance of the file persistence component.

public FilePersistence(JsonFilePersister persister)

• persister: JsonFilePersister - (optional) persister component that loads and saves data from/to a flat file.

Creates a new instance of the persistence.

public FilePersistence()

Fields

Instance methods

Configure

Configures the component by passing its configuration parameters.

public virtual void Configure(ConfigParams config)

• config: ConfigParams - configuration parameters to be set.

Examples

class MyJsonFilePersistence: FilePersistence<MyData> 
{
    public MyJsonFilePersistence(string path)
    {
        super(MyData.class, new JsonFilePersister(path));
    }
    public MyData GetByName(String correlationId, String name)
    {
        MyData item = _items.Find((mydata) => { return mydata.Name == name; });
        ...
        return item;
    } 
    public MyData Set(String correlatonId, MyData item)
    {
        this._items = _items.Filter((mydata) => { return mydata.Name != name; });
        ...
        this._items.add(item);
        this.save(correlationId);
    }
}

See also

• MemoryPersistence

• JsonFilePersister