Setting up multiple cache with ssm spring cache memcache setup

[Hariharan Visvanathan]

Hi

iam trying to get method level caching on my service layer and i want to use it by annotation only and not having put a xml entry to every cache name.

i was able to get the setup working for a single cache

but looks like if i have to add a new cache i have to put a entry in the Set for each in in cachemanager bean.

is there a way to drive this fully from annotation.

if i just add a annotaion @cacheable i get cache not found

like if i have findById and findBySubjectId methods looks like i need two ssmcache instances and both have to be declared in the SET for cachemanager bean.

am i missing something.

i was hoping to drive everything by annotation

can you please help

--- this is my config

    <cache:annotation-driven />

    <bean name="cacheManager" class="com.google.code.ssm.spring.SSMCacheManager">

        <property name="caches">

            <set>

                <bean class="com.google.code.ssm.spring.SSMCache">

                    <constructor-arg name="cache" index="0" ref="defaultCache" />

                    <constructor-arg name="expiration" index="1" value="${memcached.timeout}" />

                </bean>

                <bean class="com.google.code.ssm.spring.SSMCache">

                    <constructor-arg name="cache" index="0" ref="findById" />

                    <constructor-arg name="expiration" index="1" value="${memcached.timeout}" />

                </bean>

            </set>

        </property>

    </bean>

    <bean name="defaultCache" class="com.google.code.ssm.CacheFactory">

        <property name="cacheName" value="default" />

        <property name="cacheClientFactory" ref="myCacheClientFactory" />

        <property name="addressProvider" ref="myCacheAddressProvider" />

        <property name="configuration" ref="myCacheConfiguration" />

    </bean>

    <bean name="findById" class="com.google.code.ssm.CacheFactory">

        <property name="cacheName" value="findById" />

        <property name="cacheClientFactory" ref="myCacheClientFactory" />

        <property name="addressProvider" ref="myCacheAddressProvider" />

        <property name="configuration" ref="myCacheConfiguration" />

    </bean>

    <bean name="myCacheClientFactory" class="com.google.code.ssm.providers.spymemcached.MemcacheClientFactoryImpl" />

    <bean name="myCacheAddressProvider" class="com.google.code.ssm.config.DefaultAddressProvider">

        <property name="address" value="${memcached.nodeAddresses}" />

    </bean>

    <bean name="myCacheConfiguration" class="com.google.code.ssm.providers.CacheConfiguration">

        <property name="consistentHashing" value="true" />

        <property name="useBinaryProtocol" value="true" />

    </bean>

[Jakub Białek]

Hi,

Could you show how you use it in your code?
You can use one ssmcache for many cached metody.

__ Ragnor

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[Hariharan Visvanathan]

thanks ragnor

you are right i think i should use it as  just as a key value pair with one SSMCache instance

i got confused as if like entity cache types.

like for example i have following methods say in my interface

i just started playing around.

the only problem i have is with keygeneration

would have any idea if spring el supports like method name plus parameter id concat 

or i have to write a keygenerator class.

public interface BookManager {

@Cacheable(value="defaultCache",key="#id")

List<Book> getBooksBySubjectId(int topicId) throws DataAccessException, ValidationException;

@Cacheable(value="defaultCache",key="#id")

Book findById(String id) throws ValidationException, DataAccessException;

}

public interface BookEditionManager {

@Cacheable(value="defaultCache",key="#id")

    public List<BookEdition> findBookEditionsByBookId(String id) throws DataAccessException, ValidationException;

@Cacheable(value="defaultCache",key="#id")   

public List<BookEdition> findBookEditionsByAuthorId(String id) throws DataAccessException, ValidationException;

}

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[Jakub Białek]

According to this issue: https://jira.spring.io/browse/SPR-8933 by default method name is not used in generated cache key, only method's paramters are taken into account.

I think that one of SSM feature can help you: https://github.com/ragnor/simple-spring-memcached/issues/21. One cache can have mutiple aliases and be exposed to Spring under different names. The name will be used as a part of generated cache.

-- Ragnor

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