Package org.fryske_akademy.services

Class AbstractCrudService

java.lang.Object

org.fryske_akademy.services.AbstractCrudService

All Implemented Interfaces:

CrudReadService, CrudWriteService

Direct Known Subclasses:

AbstractCrudServiceEnvers

@DeclareRoles("editor")
public abstract class AbstractCrudService
extends Object
implements CrudWriteService, CrudReadService

This base class enables you to create crud service beans with minimal effort. All you have to do is override, implement getEntityManager and annotate with for example @Stateless, @Local(Auditing.class, CrudWriteService.class). You can also just define CDI beans instead of EJB, but be aware you won't get declarative security then.

Inject the crud interfaces using @Inject where you need them.

This base class declares Transactional and EDITORROLE to protect write operations, read operations by default support no transactions. When overriding don't forget transaction and role annotations are not inherited. If you don't need security, override and use PermitAll.

A JpqlBuilder is injected and used for building dynamic queries and for setting values when using named queries.

Author:

eduard

Nested Class Summary

Nested classes/interfaces inherited from interface org.fryske_akademy.services.CrudReadService

CrudReadService.SORTORDER

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_PAGE_SIZE	default page size (max results), used when no maximum is given.
static final String	EDITORROLE

Constructor Summary

Constructors

Constructor	Description
AbstractCrudService()

Method Summary

Modifier and Type	Method	Description
int	batchDelete(Collection<? extends EntityInterface> t, Integer flushCount)	save multiple entities, NOTE that normally only after commit or flush entitymanagers will reflect changes caused by saving all entities, this may cause entitylisteners to fail.
<T extends EntityInterface> Stream<T>	batchSave(Collection<T> entities, Integer flushCount)	save multiple entities, NOTE that normally only after commit or flush entitymanagers will reflect changes caused by saving all entities, this may cause entitylisteners to fail.
int	count(String namedQuery, List<Param> params)	Call this using the same parameters as in CrudReadService.find(java.lang.String, java.util.List, java.lang.Integer, java.lang.Integer, java.lang.Class) to get to know the total number of results
int	countDynamic(List<Param> params, Class type)	Call this using the same parameters as in findDynamic to get to know the total number of results
<T> T	create(T t)	When overriding look into roles to use, these are not inherited.
void	delete(EntityInterface t)	When overriding look into roles to use, these are not inherited.
<T> T	find(Serializable id, Class<T> type)
<T> List<T>	find(String namedQuery, List<Param> params, Integer first, Integer max, Class<T> type)
<T> List<T>	findAll(Class<T> type)
<T> List<T>	findDynamic(Integer first, Integer max, Map<String,CrudReadService.SORTORDER> sort, List<Param> params, Class<T> type)
<T> T	findExactlyOne(String namedQuery, List<Param> params, Class<T> type)	return one result, no or multiple results throws an exception
<T> List<T>	findJpql(String jpql, Class<T> clazz)	possibly unsafe
List	findNative(String sql)	possibly unsafe
<T> List<T>	findNative(String sql, Class<T> clazz)	possibly unsafe
<T> List<T>	findNative(String namedNativeQuery, List<Param> params, Integer first, Integer max, Class<T> type)
<T> T	findOne(String namedQuery, List<Param> params, Class<T> type)	return one result or null, multiple results throws an exception
int	getDefaultPageSize()	Return a default page size when no max is given, negative value means no limit
protected JpqlBuilder	getJpqlBuilder()
<T> T	refresh(T t)	refresh an entity from the database
<T extends EntityInterface> T	save(T t)	When overriding look into roles to use, these are not inherited.
protected void	setJpqlBuilder(JpqlBuilder jpqlBuilder)	override to inject your own version of JpqlBuilder
<T> Stream<T>	stream(String namedQuery, List<Param> params, Integer first, Integer max, Class<T> type)
<T> Stream<T>	streamAll(Class<T> type)
<T> Stream<T>	streamDynamic(Integer first, Integer max, Map<String,CrudReadService.SORTORDER> sort, List<Param> params, Class<T> type)
<T> Stream<T>	streamNative(String namedNativeQuery, List<Param> params, Integer first, Integer max, Class<T> type)
<T> T	update(T t)	When overriding look into roles to use, these are not inherited.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.fryske_akademy.services.CrudWriteService

getEntityManager

Field Details

DEFAULT_PAGE_SIZE

public static final int DEFAULT_PAGE_SIZE

default page size (max results), used when no maximum is given.

See Also:

• Constant Field Values

EDITORROLE

public static final String EDITORROLE

See Also:

• Constant Field Values

Constructor Details

AbstractCrudService

public AbstractCrudService()

Method Details

find

public <T> T find(Serializable id,
 Class<T> type)

Specified by:

find in interface CrudReadService

findAll

public <T> List<T> findAll(Class<T> type)

Specified by:

findAll in interface CrudReadService

findDynamic

public <T> List<T> findDynamic(Integer first,
 Integer max,
 Map<String,CrudReadService.SORTORDER> sort,
 List<Param> params,
 Class<T> type)

Specified by:

findDynamic in interface CrudReadService

Parameters:

first - defaults to 0

max - defaults to CrudReadService.getDefaultPageSize()

Returns:

countDynamic

public int countDynamic(List<Param> params,
 Class type)

Description copied from interface: CrudReadService

Call this using the same parameters as in findDynamic to get to know the total number of results

Specified by:

countDynamic in interface CrudReadService

Returns:

find

public <T> List<T> find(String namedQuery,
 List<Param> params,
 Integer first,
 Integer max,
 Class<T> type)

Specified by:

find in interface CrudReadService

first - defaults to 0

max - defaults to CrudReadService.getDefaultPageSize()

Returns:

findNative

public <T> List<T> findNative(String namedNativeQuery,
 List<Param> params,
 Integer first,
 Integer max,
 Class<T> type)

Specified by:

findNative in interface CrudReadService

first - defaults to 0

max - defaults to CrudReadService.getDefaultPageSize()

Returns:

count

public int count(String namedQuery,
 List<Param> params)

Description copied from interface: CrudReadService

Call this using the same parameters as in CrudReadService.find(java.lang.String, java.util.List, java.lang.Integer, java.lang.Integer, java.lang.Class) to get to know the total number of results

Specified by:

count in interface CrudReadService

Returns:

getDefaultPageSize

public int getDefaultPageSize()

Description copied from interface: CrudReadService

Return a default page size when no max is given, negative value means no limit

Specified by:

getDefaultPageSize in interface CrudReadService

Returns:

DEFAULT_PAGE_SIZE

findOne

public <T> T findOne(String namedQuery,
 List<Param> params,
 Class<T> type)

Description copied from interface: CrudReadService

return one result or null, multiple results throws an exception

Specified by:

findOne in interface CrudReadService

Returns:

findExactlyOne

public <T> T findExactlyOne(String namedQuery,
 List<Param> params,
 Class<T> type)
                     throws PreventEJBLoggingException

Description copied from interface: CrudReadService

return one result, no or multiple results throws an exception

Specified by:

findExactlyOne in interface CrudReadService

Returns:

Throws:

PreventEJBLoggingException

findJpql

public <T> List<T> findJpql(String jpql,
 Class<T> clazz)

possibly unsafe

Specified by:

findJpql in interface CrudReadService

Type Parameters:

T -

Parameters:

jpql -

clazz -

Returns:

findNative

public <T> List<T> findNative(String sql,
 Class<T> clazz)

possibly unsafe

Specified by:

findNative in interface CrudReadService

Type Parameters:

T -

Parameters:

sql -

clazz -

Returns:

findNative

public List findNative(String sql)

possibly unsafe

Specified by:

findNative in interface CrudReadService

Parameters:

sql -

Returns:

create

@RolesAllowed("editor")
public <T> T create(T t)

When overriding look into roles to use, these are not inherited. If you don't need security, override and use PermitAll.

Specified by:

create in interface CrudWriteService

Type Parameters:

T -

Parameters:

t -

Returns:

save

@RolesAllowed("editor")
public <T extends EntityInterface> T save(T t)

When overriding look into roles to use, these are not inherited. If you don't need security, override and use PermitAll.

Specified by:

save in interface CrudWriteService

Type Parameters:

T -

Parameters:

t -

Returns:

update

@RolesAllowed("editor")
public <T> T update(T t)

When overriding look into roles to use, these are not inherited. If you don't need security, override and use PermitAll.

Specified by:

update in interface CrudWriteService

Type Parameters:

T -

Parameters:

t -

Returns:

delete

@RolesAllowed("editor")
public void delete(EntityInterface t)

When overriding look into roles to use, these are not inherited. If you don't need security, override and use PermitAll.

Specified by:

delete in interface CrudWriteService

Parameters:

t -

batchSave

@RolesAllowed("editor")
public <T extends EntityInterface> Stream<T> batchSave(Collection<T> entities,
 Integer flushCount)

Description copied from interface: CrudWriteService

save multiple entities, NOTE that normally only after commit or flush entitymanagers will reflect changes caused by saving all entities, this may cause entitylisteners to fail. You may need to perform checks on the collection before calling this method. Also note that entitylisteners will execute within the batch transaction, you may need to specify Transactional.TxType on the bean that you use in your listeners, use isolation level 0 (not recommended) or use XA when you need to access resources from your listeners. When flushCount != null flushes and clears the entitymanager every flushCount entities. NOTE that this method executes in one (possibly big) sql transaction! You can use EntityException in for example your listeners to find out in case of failure which enitity caused it.

Specified by:

batchSave in interface CrudWriteService

flushCount - when not null try to optimize (flush/clear) every so many entities

Returns:

the saved entities

batchDelete

@RolesAllowed("editor")
public int batchDelete(Collection<? extends EntityInterface> t,
 Integer flushCount)

Description copied from interface: CrudWriteService

save multiple entities, NOTE that normally only after commit or flush entitymanagers will reflect changes caused by saving all entities, this may cause entitylisteners to fail. You may need to perform checks on the collection before calling this method. Also note that entitylisteners will execute within the batch transaction, you may need to specify Transactional.TxType on the bean that you use in your listeners, use isolation level 0 (not recommended) or use XA when you need to access resources from your listeners. When flushCount != null flushes and clears the entitymanager every flushCount entities. NOTE that this method executes in one (possibly big) sql transaction! You can use EntityException in for example your listeners to find out in case of failure which enitity caused it.

Specified by:

batchDelete in interface CrudWriteService

flushCount - when not null try to optimize (flush/clear) every so many entities

Returns:

number of entities deleted

streamAll

public <T> Stream<T> streamAll(Class<T> type)

Specified by:

streamAll in interface CrudReadService

streamDynamic

public <T> Stream<T> streamDynamic(Integer first,
 Integer max,
 Map<String,CrudReadService.SORTORDER> sort,
 List<Param> params,
 Class<T> type)

Specified by:

streamDynamic in interface CrudReadService

Parameters:

first - defaults to 0

max - defaults to CrudReadService.getDefaultPageSize()

Returns:

stream

public <T> Stream<T> stream(String namedQuery,
 List<Param> params,
 Integer first,
 Integer max,
 Class<T> type)

Specified by:

stream in interface CrudReadService

first - defaults to 0

max - defaults to CrudReadService.getDefaultPageSize()

Returns:

streamNative

public <T> Stream<T> streamNative(String namedNativeQuery,
 List<Param> params,
 Integer first,
 Integer max,
 Class<T> type)

Specified by:

streamNative in interface CrudReadService

first - defaults to 0

max - defaults to CrudReadService.getDefaultPageSize()

Returns:

refresh

@RolesAllowed("editor")
public <T> T refresh(T t)

Description copied from interface: CrudWriteService

refresh an entity from the database

Specified by:

refresh in interface CrudWriteService

Returns:

setJpqlBuilder

@Inject
protected void setJpqlBuilder(JpqlBuilder jpqlBuilder)

override to inject your own version of JpqlBuilder

Parameters:

jpqlBuilder -

getJpqlBuilder

protected JpqlBuilder getJpqlBuilder()