Package com.sap.cds.services.utils.lib.mtx.impl

Class MetaDataAccessorImpl<M>

java.lang.Object

com.sap.cds.services.utils.lib.mtx.impl.MetaDataAccessorImpl<M>

Type Parameters:

M - Type used for the Edmx model

All Implemented Interfaces:

MetaDataAccessor<M>

public class MetaDataAccessorImpl<M>
extends Object
implements MetaDataAccessor<M>

Class that provides access to CDS and Edmx models and caches them

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	MetaDataAccessorImpl.CdsModelCreator
static interface	MetaDataAccessorImpl.EdmxModelCreator<M>
static interface	MetaDataAccessorImpl.I18nResourceCreator
static class	MetaDataAccessorImpl.MetaDataAccessorConfig

Nested classes/interfaces inherited from interface com.sap.cds.services.utils.lib.mtx.MetaDataAccessor

MetaDataAccessor.I18n

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CACHE_NOT_CONFIGURED

Constructor Summary

Constructors

Constructor	Description
MetaDataAccessorImpl(MetaDataAccessorImpl.MetaDataAccessorConfig config, com.github.benmanes.caffeine.cache.Ticker cacheTicker)
MetaDataAccessorImpl(SidecarAccess sidecarAccess, CacheParams cacheParams, MetaDataAccessorImpl.EdmxModelCreator<M> strToEdmx, com.github.benmanes.caffeine.cache.Ticker cacheTicker)

Method Summary

Modifier and Type	Method	Description
void	evict(String tenantId)	evicts CDS and EDMX models for the specified tenant
com.sap.cds.reflect.CdsModel	getCdsModel(ModelId key, int maxAgeSeconds)
M	getEdmx(ModelId key, int maxAgeSeconds)
MetaDataAccessor.I18n	getI18n(ModelId modelId, int maxAgeSeconds)
void	refresh(String tenantId, int maxAgeSeconds)	TODO sync Rereads CDS and EDMX models for the specified tenant if they have changed

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.sap.cds.services.utils.lib.mtx.MetaDataAccessor

getCdsModel, refresh

Field Details

CACHE_NOT_CONFIGURED

public static final String CACHE_NOT_CONFIGURED

See Also:

• Constant Field Values

Constructor Details

MetaDataAccessorImpl

public MetaDataAccessorImpl(MetaDataAccessorImpl.MetaDataAccessorConfig config,
 com.github.benmanes.caffeine.cache.Ticker cacheTicker)

Parameters:

config - MetaDataAccessor configurations

cacheTicker - Optional ticker used by guava cache for testing purposes, use null for productive use

MetaDataAccessorImpl

public MetaDataAccessorImpl(SidecarAccess sidecarAccess,
 CacheParams cacheParams,
 MetaDataAccessorImpl.EdmxModelCreator<M> strToEdmx,
 com.github.benmanes.caffeine.cache.Ticker cacheTicker)

Parameters:

sidecarAccess - Object of type SidecarAccessthat provides access to the node.js application sidecar/mtx via a rest API

cacheParams - Parameters that control size and lifecycle of cache for cds and edmx models

strToEdmx - Function that converts an edmx model description given as string into an edmx model

cacheTicker - Optional ticker used by guava cache for testing purposes, use null for productive use

Method Details

getCdsModel

public com.sap.cds.reflect.CdsModel getCdsModel(ModelId key,
 int maxAgeSeconds)

Specified by:

getCdsModel in interface MetaDataAccessor<M>

Parameters:

key - model identifier

maxAgeSeconds - maximum acceptable age of resource

Returns:

CDS model

getEdmx

public M getEdmx(ModelId key,
 int maxAgeSeconds)
          throws com.sap.cds.CdsException

Specified by:

getEdmx in interface MetaDataAccessor<M>

Parameters:

key - model identifier

maxAgeSeconds - maximum acceptable age of resource

Returns:

EDMX model

Throws:

com.sap.cds.CdsException

getI18n

public MetaDataAccessor.I18n getI18n(ModelId modelId,
 int maxAgeSeconds)

Specified by:

getI18n in interface MetaDataAccessor<M>

Parameters:

modelId - model identifier

maxAgeSeconds - maximum acceptable age of resource

Returns:

model related i18n resources

evict

public void evict(String tenantId)

Description copied from interface: MetaDataAccessor

evicts CDS and EDMX models for the specified tenant

Specified by:

evict in interface MetaDataAccessor<M>

Parameters:

tenantId - tenant identifier

refresh

public void refresh(String tenantId,
 int maxAgeSeconds)

Description copied from interface: MetaDataAccessor

TODO sync Rereads CDS and EDMX models for the specified tenant if they have changed

Specified by:

refresh in interface MetaDataAccessor<M>

Parameters:

tenantId - tenant identifier

maxAgeSeconds - maximum acceptable age of resource