com.redhat.lightblue.mediator

Class Mediator

java.lang.Object

com.redhat.lightblue.mediator.Mediator

public class Mediator
extends Object

The mediator looks at a request, performs basic validation, and passes the operation to one or more of the controllers based on the request attributes.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Mediator.BulkExecutionContext

Field Summary

Fields

Modifier and Type	Field and Description
static String	CRUD_MSG_PREFIX
static String	CTX_QPLAN

Constructor Summary

Constructors

Constructor and Description
Mediator(Metadata md, Factory factory)

Method Summary

Modifier and Type	Method and Description
BulkResponse	bulkRequest(BulkRequest requests)
Response	delete(DeleteRequest req)
Response	explain(FindRequest req) Explains the query.
Response	find(FindRequest req) Finds documents
protected Callable<Response>	getAsyncFind(FindRequest req)
Response	insert(InsertionRequest req) Inserts data
protected OperationContext	newCtx(Request request, CRUDOperation CRUDOperation)
Response	save(SaveRequest req) Saves data.
Response	update(UpdateRequest req) Updates documents that match the given search criteria
protected void	wait(Mediator.BulkExecutionContext ctx)

Methods inherited from class java.lang.Object

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

Field Detail

CTX_QPLAN

public static final String CTX_QPLAN

See Also:

Constant Field Values

CRUD_MSG_PREFIX

public static final String CRUD_MSG_PREFIX

See Also:

Constant Field Values

Constructor Detail

Mediator

public Mediator(Metadata md,
                Factory factory)

Method Detail

insert

public Response insert(InsertionRequest req)

Inserts data

Parameters:

req - Insertion request Mediator performs constraint and role validation, and passes documents that pass the validation to the CRUD implementation for that entity. CRUD implementation can perform further validations.

save

public Response save(SaveRequest req)

Saves data. Documents in the DB that match the ID of the documents in the request are rewritten. If a document does not exist in the DB and upsert=true, the document is inserted.

Parameters:

req - Save request Mediator performs constraint validation, and passes documents that pass the validation to the CRUD implementation for that entity. CRUD implementation can perform further validations.

update

public Response update(UpdateRequest req)

Updates documents that match the given search criteria

Parameters:

req - Update request All documents matching the search criteria are updated using the update expression given in the request. Then, the updated document is projected and returned in the response. The mediator does not perform any constraint validation. The CRUD implementation must perform all constraint validations and process only the documents that pass those validations.

delete

public Response delete(DeleteRequest req)

find

public Response find(FindRequest req)

Finds documents

Parameters:

req - Find request The implementation passes the request to the back-end.

explain

public Response explain(FindRequest req)

Explains the query. Part of the implementation is done here at the core level, and then passed to the backend to fill in back-end specifics

wait

protected void wait(Mediator.BulkExecutionContext ctx)

getAsyncFind

protected Callable<Response> getAsyncFind(FindRequest req)

bulkRequest

public BulkResponse bulkRequest(BulkRequest requests)

newCtx

protected OperationContext newCtx(Request request,
                                  CRUDOperation CRUDOperation)