korlov42 commented on a change in pull request #652:
URL: https://github.com/apache/ignite-3/pull/652#discussion_r805710995
##########
File path:
modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/prepare/QueryPlanCacheImpl.java
##########
@@ -18,44 +18,93 @@
package org.apache.ignite.internal.sql.engine.prepare;
import com.github.benmanes.caffeine.cache.Caffeine;
-import java.util.Map;
+import java.util.concurrent.CancellationException;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;
+import org.apache.ignite.internal.thread.NamedThreadFactory;
+import org.apache.ignite.lang.IgniteException;
+import org.apache.ignite.lang.IgniteInternalException;
/**
* Implementation of {@link QueryPlanCache} that simply wraps a {@link
Caffeine} cache.
*/
public class QueryPlanCacheImpl implements QueryPlanCache {
- private final ConcurrentMap<CacheKey, QueryPlan> cache;
+ private static final long THREAD_TIMEOUT_MS = 60_000;
+
+ private final ConcurrentMap<CacheKey, CompletableFuture<QueryPlan>> cache;
+
+ private final ThreadPoolExecutor planningPool;
/**
* Creates a plan cache of provided size.
*
* @param cacheSize Desired cache size.
*/
- public QueryPlanCacheImpl(int cacheSize) {
+ public QueryPlanCacheImpl(String nodeName, int cacheSize) {
+ planningPool = new ThreadPoolExecutor(
+ 4,
+ 4,
+ THREAD_TIMEOUT_MS,
+ TimeUnit.MILLISECONDS,
+ new LinkedBlockingQueue<>(),
+ new
NamedThreadFactory(NamedThreadFactory.threadPrefix(nodeName, "sqlPlan"))
+ );
+
+ planningPool.allowCoreThreadTimeOut(true);
+
cache = Caffeine.newBuilder()
.maximumSize(cacheSize)
- .<CacheKey, QueryPlan>build()
+ .<CacheKey, CompletableFuture<QueryPlan>>build()
.asMap();
}
/** {@inheritDoc} */
@Override
public QueryPlan queryPlan(CacheKey key, Supplier<QueryPlan> planSupplier)
{
- Map<CacheKey, QueryPlan> cache = this.cache;
- QueryPlan plan = cache.computeIfAbsent(key, k -> planSupplier.get());
+ CompletableFuture<QueryPlan> planFut = cache.computeIfAbsent(key, k ->
CompletableFuture.supplyAsync(planSupplier, planningPool));
+
+ try {
+ return planFut.join().copy();
+ } catch (CancellationException | CompletionException ex) {
Review comment:
Deduplicate the exception handling. But generic ExceptionUtils is
outside of the scope of this issue, I believe.
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