net.benpl.r2dbc

接口 R2dbc

所有已知实现类:

H2, Mssql, Mysql, Postgres

public interface R2dbc

方法概要

限定符和类型	方法和说明
<T> reactor.core.publisher.Mono<Long>	count(Class<T> clazz) Returns the number of entities available.
<T> reactor.core.publisher.Mono<Boolean>	delete(T entity) Deletes the given entity.
<T> reactor.core.publisher.Mono<Integer>	deleteAll(Class<T> clazz) Deletes all entities.
<T> reactor.core.publisher.Mono<Integer>	deleteAll(List<T> entities) Deletes the given entities.
<T> reactor.core.publisher.Mono<Boolean>	deleteById(Class<T> clazz, @NonNull Object id) Deletes the entity with the given id.
org.springframework.data.r2dbc.core.DatabaseClient.GenericExecuteSpec	execute(String sql, Object... params) Executes SQL with given parameters.
<T> reactor.core.publisher.Mono<Boolean>	existsById(Class<T> clazz, @NonNull Object id) Returns whether an entity with the id exists.
<T> reactor.core.publisher.Flux<T>	findAll(Class<T> clazz) Returns all instances of the type.
<T> reactor.core.publisher.Mono<T>	findById(Class<T> clazz, @NonNull Object id) Retrieves an entity by its id.
static R2dbc	of(org.springframework.data.r2dbc.core.DatabaseClient databaseClient, Type type) Initializes a R2dbc instance.
<T> reactor.core.publisher.Mono<T>	save(T entity) Saves a given entity.
<T> reactor.core.publisher.Flux<T>	select(Class<T> clazz, String sql, Object... params) Performs SELECT operation with given SQL and parameters.
reactor.core.publisher.Mono<Integer>	update(String sql, Object... params) Performs DELETE/UPDATE/...

方法详细资料

count

<T> reactor.core.publisher.Mono<Long> count(Class<T> clazz)

Returns the number of entities available.

参数:

clazz - the entity type.

返回:

Mono emitting the number of entities.

existsById

<T> reactor.core.publisher.Mono<Boolean> existsById(Class<T> clazz,
                                                    @NonNull
                                                    @NonNull Object id)

Returns whether an entity with the id exists.

参数:

clazz - the entity type.

id - must not be null.

返回:

Mono emitting true if an entity with the given id exists, false otherwise.

save

<T> reactor.core.publisher.Mono<T> save(T entity)

Saves a given entity. Use the returned instance for further operations as the save operation might have changed the entity instance completely.

参数:

entity - must not be null.

返回:

Mono emitting the saved entity.

findById

<T> reactor.core.publisher.Mono<T> findById(Class<T> clazz,
                                            @NonNull
                                            @NonNull Object id)

Retrieves an entity by its id.

参数:

clazz - the entity type.

id - must not be null.

返回:

Mono emitting the entity with the given id or Mono.empty() if none found.

findAll

<T> reactor.core.publisher.Flux<T> findAll(Class<T> clazz)

Returns all instances of the type.

参数:

clazz - the entity type.

返回:

Flux emitting all entities.

delete

<T> reactor.core.publisher.Mono<Boolean> delete(@NonNull
                                                T entity)

Deletes the given entity.

参数:

entity - must not be null.

返回:

Mono emitting true if success, false otherwise.

deleteAll

<T> reactor.core.publisher.Mono<Integer> deleteAll(List<T> entities)

Deletes the given entities.

参数:

entities - must not be null.

返回:

Mono the number of entities deleted.

deleteById

<T> reactor.core.publisher.Mono<Boolean> deleteById(Class<T> clazz,
                                                    @NonNull
                                                    @NonNull Object id)

Deletes the entity with the given id.

参数:

clazz - the entity type.

id - must not be null.

返回:

Mono emitting true if success, false otherwise.

deleteAll

<T> reactor.core.publisher.Mono<Integer> deleteAll(Class<T> clazz)

Deletes all entities.

参数:

clazz - the entity type.

返回:

Mono the number of entities deleted.

select

<T> reactor.core.publisher.Flux<T> select(Class<T> clazz,
                                          String sql,
                                          Object... params)

Performs SELECT operation with given SQL and parameters.

参数:

clazz - the entity type.

sql - the SQL.

params - the parameters. each parameter must not be null

返回:

Flux emitting the selected entities.

update

reactor.core.publisher.Mono<Integer> update(String sql,
                                            Object... params)

Performs DELETE/UPDATE/...(update) operation with given SQL and parameters.

参数:

sql - the SQL.

params - the parameters. each parameter must not be null

返回:

Mono the number of entities updated.

execute

org.springframework.data.r2dbc.core.DatabaseClient.GenericExecuteSpec execute(String sql,
                                                                              Object... params)

Executes SQL with given parameters.

参数:

sql - the SQL.

params - the parameters. each parameter must not be null

返回:

DatabaseClient.GenericExecuteSpec user to decide how to handle the execution result.

of

static R2dbc of(org.springframework.data.r2dbc.core.DatabaseClient databaseClient,
                Type type)

Initializes a R2dbc instance.

参数:

databaseClient - DatabaseClient instance.

type - R2dbc type

返回:

Created R2dbc instance.