Spring Data Solr multiple cores and repository - spring

Question

I have apache solr with multiple cores e.g. currency, country etc... So using Spring Data Solr I can retrieve information from one core. I have got this XML configuration right now queries against 'currency' core. If I wanted to query against 'country' core how can I set this up?
<!-- Enable Solr repositories and configure repository base package -->
<solr:repositories base-package="com.acme.repository" solr-template-ref="solrCurrencyTemplate"/>
<solr:solr-server id="solrCurrencyServer" url="http://localhost:8983/solr/currency"/>
<bean id="solrCurrencyTemplate" class="org.springframework.data.solr.core.SolrTemplate">
<constructor-arg ref="solrCurrencyServer" />
</bean>
and have the repository defined as
#Repository
public interface CurrencyRepository extends SolrCrudRepository<Currency, String> {
}
and from my service I can do this
#Override
public List<Currency> getCurrencies() {
Page<Currency> currencies = (Page<Currency>) currencyRepository.findAll();
return currencies.getContent();
}
I have also tried using #SolrDocument(solrCoreName = "currency") but this din't work.
#SolrDocument(solrCoreName = "currency")
public class Currency {
public static final String FIELD_CURRENCY_NAME = "currency_name";
public static final String FIELD_CURRENCY_CODE = "currency_code";
public static final String FIELD_DECIMALS = "decimals";
#Id
#Field(value = FIELD_CURRENCY_CODE)
private String currencyCode;
//currency_name,decimals
#Field(value = FIELD_CURRENCY_NAME)
private String currencyName;
#Field(value = FIELD_DECIMALS)
private String decimals;
...
...
...
}
I need help on this asap... otherwise I will have to go back to the RestTemplate Solution :-(
Hope someone can help.
Thanks
GM

Answer 1

Thought I would share, We spend lot of time recently configuring multiple cores. We did in java, not xml.
As part of spring #configuration add following.
#Bean(name="solrCore1Template")
public SolrTemplate solrCore1Template() throws Exception {
EmbeddedSolrServer embeddedSolrServer = new EmbeddedSolrServer(getCoreContainer(), "core1");
return new SolrTemplate(embeddedSolrServer);
}
#Bean(name="solrCore2Template")
public SolrTemplate solrCore2Template() throws Exception {
EmbeddedSolrServer embeddedSolrServer = new EmbeddedSolrServer(getCoreContainer(), "core2");
return new SolrTemplate(embeddedSolrServer);
}
#Bean
#Scope
public CoreContainer getCoreContainer() throws FileNotFoundException{
String dir = <path_to_solr_home>;
System.setProperty("solr.solr.home", dir);
CoreContainer.Initializer initializer = new CoreContainer.Initializer();
return initializer.initialize();
}
And to use each template use like below in service classes.
#Resource
private SolrTemplate solrCore1Template;
Embedded server can be relaced with HTTP using below code.
HttpSolrServer httpSolrServer = new HttpSolrServer(getSolrURL());
return new SolrTemplate(httpSolrServer, "core1");
Hope this helps. I know it's a very late reply for the question asked.

Answer 2

multicore support via namespace config is unfortunately an open issue. You'll need to have a separate SolrTemplate for each core and create repositories manually.
#Autowired
#Qualifier("solrCurrencyTemplate")
private SolrTemplate solrCurrencyTemplate;
#Autowired
#Qualifier("solrCountryTemplate")
private SolrTemplate solrCountryTemplate;
//...
CurrencyRepository currencyRepo = new SolrRepositoryFactory(this.solrCurrencyTemplate)
.getRepository(CurrencyRepository.class);
CountryRepository countryRepo = new SolrRepositoryFactory(this.solrCountryTemplate)
.getRepository(CountryRepository.class);

Answer 3

Spring Data now supports multiple cores with their respective repositories.
The multicoreSupport flag needs to be true in #EnableSolrRepositories annotation and the corresponding document needs to be told what core they belong to. Like:
#SolrDocument(solrCoreName = "currency")
public class Currency
{
// attributes
}
the other class should be
#SolrDocument(solrCoreName = "country")
public class Country
{
// attributes
}
The respective repositories should know what pojo they are working with.
public interface CurrencyRepository extends SolrCrudRepository<Currency,String>
{
}
and
public interface CountryRepository extends SolrCrudRepository<Country,String>
{
}
and configuration should be
#Configuration
#EnableSolrRepositories(value = "com.package.name",multicoreSupport = true)
public class SolrConfig
{
#Bean
public SolrServer solrServer() throws Exception
{
HttpSolrServerFactoryBean f = new HttpSolrServerFactoryBean();
f.setUrl("http://localhost:8983/solr");
f.afterPropertiesSet();
return f.getSolrServer();
}
#Bean
public SolrTemplate solrTemplate(SolrServer solrServer) throws Exception
{
return new SolrTemplate(solrServer());
}
}

Answer 4

With Spring Data Solr 1.1.0.RC1 multiple cores works as described by Christoph Strobl with #EnableSolrRepositories. It works also with an XML configuration by set multicore-support="true".
<solr:repositories base-package="your.solr.repo.package" repository-impl-postfix="Impl" multicore-support="true"/>
<solr:solr-server id="solrServer" url="${solr.server.base.connection.url}" />
<bean id="solrTemplate" class="org.springframework.data.solr.core.SolrTemplate">
<constructor-arg index="0" ref="solrServer" />
</bean>

Answer 5

<solr:solr-server id="solrServer" timeout="1000" maxConnections="1000" url="${solr.server.1},${solr.server.2}"/>
<bean id="solrServerFactory" class="org.springframework.data.solr.server.support.MulticoreSolrServerFactory">
<constructor-arg ref="solrServer" />
<constructor-arg name="cores">
<list>
<value>${solr.index.customer}</value>
<value>${solr.index.task}</value>
</list>
</constructor-arg>
</bean>
<bean id="solrTemplate" class="org.springframework.data.solr.core.SolrTemplate">
<constructor-arg ref="solrServerFactory" />
</bean>
<solr:repositories base-package="com.deve.pig.solr" multicore-support="true" solr-template-ref="solrTemplate" />