com.erudika.para.persistence

Class MockDAO

java.lang.Object

com.erudika.para.persistence.MockDAO

All Implemented Interfaces:

DAO

@Singleton
public class MockDAO
extends Object
implements DAO

Fake DAO for in-memory persistence. Used for testing and development without a database.

Author:

Alex Bogdanovski [alex@erudika.com]

Constructor Summary

Constructors

Constructor and Description
MockDAO()

Method Summary

Modifier and Type	Method and Description
<P extends ParaObject> String	create(P so) Persists an object to the data store.
<P extends ParaObject> String	create(String appid, P so) Persists an object to the data store.
<P extends ParaObject> void	createAll(List<P> objects) Saves multiple objects to the data store.
<P extends ParaObject> void	createAll(String appid, List<P> objects) Saves multiple objects to the data store.
<P extends ParaObject> void	delete(P so) Deletes an object permanently.
<P extends ParaObject> void	delete(String appid, P so) Deletes an object permanently.
<P extends ParaObject> void	deleteAll(List<P> objects) Deletes multiple objects.
<P extends ParaObject> void	deleteAll(String appid, List<P> objects) Deletes multiple objects.
<P extends ParaObject> P	read(String key) Retrieves an object from the data store.
<P extends ParaObject> P	read(String appid, String key) Retrieves an object from the data store.
<P extends ParaObject> Map<String,P>	readAll(List<String> keys, boolean getAllColumns) Retrieves multiple objects from the data store.
<P extends ParaObject> Map<String,P>	readAll(String appid, List<String> keys, boolean getAllColumns) Retrieves multiple objects from the data store.
<P extends ParaObject> List<P>	readPage(Pager pager) Reads a fixed number of objects.
<P extends ParaObject> List<P>	readPage(String appid, Pager pager) Reads a fixed number of objects.
<P extends ParaObject> void	update(P so) Updates an object permanently.
<P extends ParaObject> void	update(String appid, P so) Updates an object permanently.
<P extends ParaObject> void	updateAll(List<P> objects) Updates multiple objects.
<P extends ParaObject> void	updateAll(String appid, List<P> objects) Updates multiple objects.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MockDAO

public MockDAO()

Method Detail

create

public <P extends ParaObject> String create(String appid,
                                            P so)

Description copied from interface: DAO

Persists an object to the data store.

Specified by:

create in interface DAO

Type Parameters:

P - the type of object

Parameters:

appid - name of the App

so - the domain object

Returns:

the object's id or null if not created.

read

public <P extends ParaObject> P read(String appid,
                                     String key)

Description copied from interface: DAO

Retrieves an object from the data store.

Specified by:

read in interface DAO

Type Parameters:

P - the type of object

Parameters:

appid - name of the App

key - an object id

Returns:

the object or null if not found

update

public <P extends ParaObject> void update(String appid,
                                          P so)

Description copied from interface: DAO

Updates an object permanently.

Specified by:

update in interface DAO

Type Parameters:

P - the type of object

Parameters:

appid - name of the App

so - the domain object

delete

public <P extends ParaObject> void delete(String appid,
                                          P so)

Description copied from interface: DAO

Deletes an object permanently.

Specified by:

delete in interface DAO

Type Parameters:

P - the type of object

Parameters:

appid - name of the App

so - the domain object

createAll

public <P extends ParaObject> void createAll(String appid,
                                             List<P> objects)

Description copied from interface: DAO

Saves multiple objects to the data store.

Specified by:

createAll in interface DAO

Type Parameters:

P - the type of object

Parameters:

appid - name of the App

objects - the list of objects to save

readAll

public <P extends ParaObject> Map<String,P> readAll(String appid,
                                                    List<String> keys,
                                                    boolean getAllColumns)

Description copied from interface: DAO

Retrieves multiple objects from the data store.

Specified by:

readAll in interface DAO

Type Parameters:

P - the type of object

Parameters:

appid - name of the App

keys - a list of object ids

getAllColumns - true if all columns must be retrieved. used to save bandwidth.

Returns:

a map of ids to objects

readPage

public <P extends ParaObject> List<P> readPage(String appid,
                                               Pager pager)

Description copied from interface: DAO

Reads a fixed number of objects. Used for scanning a data store page by page. Calling this method would bypass the read cache and will hit the DB.

Specified by:

readPage in interface DAO

Type Parameters:

P - the type of object

Parameters:

appid - name of the App

pager - a Pager

Returns:

a list of objects

updateAll

public <P extends ParaObject> void updateAll(String appid,
                                             List<P> objects)

Description copied from interface: DAO

Updates multiple objects.

Specified by:

updateAll in interface DAO

Type Parameters:

P - the type of object

Parameters:

appid - name of the App

objects - a list of objects to update

deleteAll

public <P extends ParaObject> void deleteAll(String appid,
                                             List<P> objects)

Description copied from interface: DAO

Deletes multiple objects.

Specified by:

deleteAll in interface DAO

Type Parameters:

P - the type of object

Parameters:

appid - name of the App

objects - a list of objects to delete

create

public <P extends ParaObject> String create(P so)

Description copied from interface: DAO

Persists an object to the data store.

Specified by:

create in interface DAO

Type Parameters:

P - the type of object

Parameters:

so - the domain object

Returns:

the object's id or null if not created.

read

public <P extends ParaObject> P read(String key)

Description copied from interface: DAO

Retrieves an object from the data store.

Specified by:

read in interface DAO

Type Parameters:

P - the type of object

Parameters:

key - an object id

Returns:

the object or null if not found

update

public <P extends ParaObject> void update(P so)

Description copied from interface: DAO

Updates an object permanently.

Specified by:

update in interface DAO

Type Parameters:

P - the type of object

Parameters:

so - the domain object

delete

public <P extends ParaObject> void delete(P so)

Description copied from interface: DAO

Deletes an object permanently.

Specified by:

delete in interface DAO

Type Parameters:

P - the type of object

Parameters:

so - the domain object

createAll

public <P extends ParaObject> void createAll(List<P> objects)

Description copied from interface: DAO

Saves multiple objects to the data store.

Specified by:

createAll in interface DAO

Type Parameters:

P - the type of object

Parameters:

objects - the list of objects to save

readAll

public <P extends ParaObject> Map<String,P> readAll(List<String> keys,
                                                    boolean getAllColumns)

Description copied from interface: DAO

Retrieves multiple objects from the data store.

Specified by:

readAll in interface DAO

Type Parameters:

P - the type of object

Parameters:

keys - a list of object ids

getAllColumns - true if all columns must be retrieved. used to save bandwidth.

Returns:

a map of ids to objects

readPage

public <P extends ParaObject> List<P> readPage(Pager pager)

Description copied from interface: DAO

Reads a fixed number of objects. Used for scanning a data store page by page. Calling this method would bypass the read cache and will hit the DB.

Specified by:

readPage in interface DAO

Type Parameters:

P - the type of object

Parameters:

pager - a Pager

Returns:

a list of objects

updateAll

public <P extends ParaObject> void updateAll(List<P> objects)

Description copied from interface: DAO

Updates multiple objects.

Specified by:

updateAll in interface DAO

Type Parameters:

P - the type of object

Parameters:

objects - a list of objects to update

deleteAll

public <P extends ParaObject> void deleteAll(List<P> objects)

Description copied from interface: DAO

Deletes multiple objects.

Specified by:

deleteAll in interface DAO

Type Parameters:

P - the type of object

Parameters:

objects - a list of objects to delete