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Package simple-memory-db
Short Description A simple db in memory
License MIT
Homepage https://github.com/jlaso/simple-memory-db
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Informations about the package simple-memory-db
jlaso/simple-memory-db
A simple db in memory, that has to be populated from JSON data.
It lives entirely in memory, quick to access data and manipulate in order to process data at very high speed.
Installation
You need only to require this package in your project
Look at the Examples folders to see how to use it
Example
You have a very simple example with two tables: customers and taxes, each customer has a tax_type associated.
In order to implement your data you have to create a class extending AbstractTable and declare the property $indexMap
by default is automatically indexed. So, this field is mandatory in every table, must come in the json.
BigExample
You can just squeeze it in order to know how big is the limit of this database is in your system.
In order to populate the memory tables with real data, the json files can be generated parametrically:
And to see the results
ProcessRecord
If you need to add some extra fields or process the records somehow when they are loaded in memory you can implement the method in your table
Modifier methods
Although is not a real database you can insert new elements or remove the existent ones:
Insert
This insert the new record in memory and updates
the indices to make it accessible.
$data can be an array or an object that implements the JLaso\SimpleMemoryDb\ToArrayInterface
Update
This is an alias for insert, currently insert just replaces the existent copy of the record inserted if any.
Remove
This removes the record pointed by and updates the indices to make it not accessible.
Storing method
And, why not ... dump it into a json file again.
Find methods
find($id)
Just fetches the current record pointed by $id or null if does not exist.
findAll($field, $value, $filterCallback)
if $field and $value are null returns all the records.
Always passes the record to $filterCallback being to added in order to know if
passes the filter. Obviously if $filterCallback is null no filter applied.
You can check the examples on the Tests folder.
Exceptions
Since version 1.5 added the property $notFoundThrowsException in order to throw or not
an Excepcion in the case the record is not found.
