/**
* Query all purchases made at a specific store for 3 specific products. This query uses
* cross-cache joins between {@link DimStore}, {@link DimProduct} objects stored in {@code
* 'replicated'} cache and {@link FactPurchase} objects stored in {@code 'partitioned'} cache.
*
* @throws IgniteException If failed.
*/
private static void queryProductPurchases() {
IgniteCache<Integer, FactPurchase> factCache = Ignition.ignite().cache(PARTITIONED_CACHE_NAME);
// All purchases for certain product made at store2.
// =================================================
DimProduct p1 = rand(dataProduct.values());
DimProduct p2 = rand(dataProduct.values());
DimProduct p3 = rand(dataProduct.values());
System.out.println(
"IDs of products [p1=" + p1.getId() + ", p2=" + p2.getId() + ", p3=" + p3.getId() + ']');
// Create cross cache query to get all purchases made at store2
// for specified products.
QueryCursor<Cache.Entry<Integer, FactPurchase>> prodPurchases =
factCache.query(
new SqlQuery(
FactPurchase.class,
"from \""
+ REPLICATED_CACHE_NAME
+ "\".DimStore, \""
+ REPLICATED_CACHE_NAME
+ "\".DimProduct, "
+ "\""
+ PARTITIONED_CACHE_NAME
+ "\".FactPurchase "
+ "where DimStore.id=FactPurchase.storeId and DimProduct.id=FactPurchase.productId "
+ "and DimStore.name=? and DimProduct.id in(?, ?, ?)")
.setArgs("Store2", p1.getId(), p2.getId(), p3.getId()));
printQueryResults(
"All purchases made at store2 for 3 specific products:", prodPurchases.getAll());
}
/**
* Executes example.
*
* @param args Command line arguments, none required.
*/
public static void main(String[] args) {
try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
System.out.println();
System.out.println(">>> Cache star schema example started.");
CacheConfiguration<Integer, FactPurchase> factCacheCfg =
new CacheConfiguration<>(PARTITIONED_CACHE_NAME);
factCacheCfg.setCacheMode(CacheMode.PARTITIONED);
factCacheCfg.setIndexedTypes(Integer.class, FactPurchase.class);
CacheConfiguration<Integer, Object> dimCacheCfg =
new CacheConfiguration<>(REPLICATED_CACHE_NAME);
dimCacheCfg.setCacheMode(CacheMode.REPLICATED);
dimCacheCfg.setIndexedTypes(
Integer.class, DimStore.class,
Integer.class, DimProduct.class);
try (IgniteCache<Integer, FactPurchase> factCache = ignite.getOrCreateCache(factCacheCfg);
IgniteCache<Integer, Object> dimCache = ignite.getOrCreateCache(dimCacheCfg)) {
populateDimensions(dimCache);
populateFacts(factCache);
queryStorePurchases();
queryProductPurchases();
}
}
}
/**
* Query all purchases made at a specific store. This query uses cross-cache joins between {@link
* DimStore} objects stored in {@code 'replicated'} cache and {@link FactPurchase} objects stored
* in {@code 'partitioned'} cache.
*
* @throws IgniteException If failed.
*/
private static void queryStorePurchases() {
IgniteCache<Integer, FactPurchase> factCache = Ignition.ignite().cache(PARTITIONED_CACHE_NAME);
// All purchases for store1.
// ========================
// Create cross cache query to get all purchases made at store1.
QueryCursor<Cache.Entry<Integer, FactPurchase>> storePurchases =
factCache.query(
new SqlQuery(
FactPurchase.class,
"from \""
+ REPLICATED_CACHE_NAME
+ "\".DimStore, \""
+ PARTITIONED_CACHE_NAME
+ "\".FactPurchase "
+ "where DimStore.id=FactPurchase.storeId and DimStore.name=?")
.setArgs("Store1"));
printQueryResults("All purchases made at store1:", storePurchases.getAll());
}