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Posted to user@ignite.apache.org by juanavelez <js...@gmail.com> on 2017/01/03 16:10:49 UTC

JCache and CacheManager.getCache

I am trying to obtain a Cache<Integer, MyObject> using JCache's
CacheManager.getCache("myCache", Integer.class, MyObject.class) but it fails
with a ClassCastException (can't convert from Object to Integer). The cache
is configured in an ignite configuration xml file, but I don't see a way to
set the types for the key and value. How is the correct way to obtain an
existing cache which has been configured using the spring/xml approach by
using the JCache api?

Thanks - J



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Re: JCache and CacheManager.getCache

Posted by vkulichenko <va...@gmail.com>.
You don't need to provide types to get a cache. Just do this:

Cache<Integer, MyObject> cache = cacheManager.getCache("myCache");

-Val



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Re: JCache and CacheManager.getCache

Posted by Juan Velez <js...@gmail.com>.
public class Test {

    public static void main(String[] args) throws IOException {
        CacheManager cacheManager = Caching.getCachingProvider().getCacheManager(new ClassPathResource("ignite-config-simple.xml").getURI(), null);
        Cache<Integer, MyObject> cache = cacheManager.getCache("myCache", Integer.class, MyObject.class);
    }
}

Exception in thread "main" java.lang.ClassCastException
	at org.apache.ignite.cache.CacheManager.getCache(CacheManager.java:203)
	at Test.main(Test.java:15)


ignite-config-simple.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="grid.cfg" class="org.apache.ignite.configuration.IgniteConfiguration">
        <property name="metricsLogFrequency" value="0"/>
        <property name="gridLogger">
            <bean class="org.apache.ignite.logger.slf4j.Slf4jLogger"/>
        </property>
        <property name="cacheConfiguration">
            <list>
                <bean class="org.apache.ignite.configuration.CacheConfiguration">
                    <property name="name" value="myCache"/>
                    <property name="cacheMode" value="PARTITIONED"/>
                    <property name="atomicityMode" value="ATOMIC"/>
                    <property name="backups" value="1"/>
                </bean>
            </list>
        </property>
    </bean>
</beans>



> On 03 Jan, 2017, at 9:05 AM, vkulichenko <va...@gmail.com> wrote:
> 
> Can you show the trace?
> 
> -Val
> 
> 
> 
> --
> View this message in context: http://apache-ignite-users.70518.x6.nabble.com/JCache-and-CacheManager-getCache-tp9847p9848.html
> Sent from the Apache Ignite Users mailing list archive at Nabble.com.

Re: JCache and CacheManager.getCache

Posted by Juan Velez <js...@gmail.com>.
Ok, I see now, yes there is not “getter/setter” for types, so the only way is to programmatically call MutableConfiguration.setTypes(). 

I will use your suggested approach. Thanks - J
> On 03 Jan, 2017, at 11:33 AM, vkulichenko <va...@gmail.com> wrote:
> 
> It is supported if you provide key and value classes in CacheConfiguration,
> but this is possible only in code, not in XML.
> 
> -Val
> 
> 
> 
> --
> View this message in context: http://apache-ignite-users.70518.x6.nabble.com/JCache-and-CacheManager-getCache-tp9847p9853.html
> Sent from the Apache Ignite Users mailing list archive at Nabble.com.

Re: JCache and CacheManager.getCache

Posted by vkulichenko <va...@gmail.com>.
It is supported if you provide key and value classes in CacheConfiguration,
but this is possible only in code, not in XML.

-Val



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Re: JCache and CacheManager.getCache

Posted by Juan Velez <js...@gmail.com>.
So the CacheManager.getCache(String, Class<?>, Class<?>) is not supported then?

Thanks - J
> On 03 Jan, 2017, at 9:05 AM, vkulichenko <va...@gmail.com> wrote:
> 
> Can you show the trace?
> 
> -Val
> 
> 
> 
> --
> View this message in context: http://apache-ignite-users.70518.x6.nabble.com/JCache-and-CacheManager-getCache-tp9847p9848.html
> Sent from the Apache Ignite Users mailing list archive at Nabble.com.

Re: JCache and CacheManager.getCache

Posted by vkulichenko <va...@gmail.com>.
Can you show the trace?

-Val



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