Using the QueryManager API

The QueryManager Builder and Interface

BigMemory SQL searches are performed using the QueryManager builder and interface.

public final class QueryManagerBuilder 
{ 
    public static QueryManagerBuilder newQueryManagerBuilder() 
    { 
    } 
    public QueryManagerBuilder addCache(Ehcache cache) 
    { 
    } 
    public QueryManagerBuilder addAllCachesCurrentlyIn(CacheManager cacheManager) 
    { 
        for (String s : cacheManager.getCacheNames()) 
        { 
            final Ehcache cache = cacheManager.getEhcache(s); 
        } 
    } 
    public QueryManager build() 
    { 
    } 
} 
public interface QueryManager 
{ 
  Query createQuery(String queryString); 
}

Specifying Caches to Query

You can explicitly add a cache to be searched by BigMemory SQL, or you can specify the CacheManager that contains the caches. The following example does both:

QueryManager queryManager = QueryManagerBuilder 
         .newQueryManagerBuilder() 
         .addCache(cache1) 
         .addCache(cache2) 
         .addAllCachesCurrentlyIn(cacheManager1) 
         .addAllCachesCurrentlyIn(cacheManager2) 
    .build();

Note: A build of the QueryManager is a snapshot of the state of the CacheManagers and Caches. If CacheManagers or Caches are added or removed after the build, a new QueryManager should be built before issuing the query.

Specifying the Query

The createQuery() method takes one string argument that represents a BigMemory SQL SELECT clause:

Query query = queryManager.createQuery("queryString");