Github user arina-ielchiieva commented on a diff in the pull request:
https://github.com/apache/drill/pull/928#discussion_r142718897
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/work/foreman/rm/DefaultResourceManager.java
---
@@ -0,0 +1,121 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.drill.exec.work.foreman.rm;
+
+import org.apache.drill.common.config.DrillConfig;
+import org.apache.drill.exec.ops.QueryContext;
+import org.apache.drill.exec.physical.PhysicalPlan;
+import org.apache.drill.exec.server.BootStrapContext;
+import org.apache.drill.exec.util.MemoryAllocationUtilities;
+import org.apache.drill.exec.work.QueryWorkUnit;
+import org.apache.drill.exec.work.foreman.Foreman;
+
+/**
+ * Represents a default resource manager for clusters that do not provide
query
+ * queues. Without queues to provide a hard limit on the query admission
rate,
+ * the number of active queries must be estimated and the resulting
resource
+ * allocations will be rough estimates.
+ */
+
+public class DefaultResourceManager implements ResourceManager {
+
+ public static class DefaultResourceAllocator implements
QueryResourceAllocator {
+
+ private QueryContext queryContext;
+
+ protected DefaultResourceAllocator(QueryContext queryContext) {
+ this.queryContext = queryContext;
+ }
+
+ @Override
+ public void visitAbstractPlan(PhysicalPlan plan) {
+ if (plan == null || plan.getProperties().hasResourcePlan) {
+ return;
+ }
+ MemoryAllocationUtilities.setupBufferedOpsMemoryAllocations(plan,
queryContext);
+ }
+
+ @Override
+ public void visitPhysicalPlan(QueryWorkUnit work) {
+ }
+ }
+
+ public static class DefaultQueryResourceManager extends
DefaultResourceAllocator implements QueryResourceManager {
+
+ @SuppressWarnings("unused")
+ private final DefaultResourceManager rm;
+
+ public DefaultQueryResourceManager(final DefaultResourceManager rm,
final Foreman foreman) {
+ super(foreman.getQueryContext());
+ this.rm = rm;
+ }
+
+ @Override
+ public void setCost(double cost) {
+ // Nothing to do by default.
+ }
+
+ @Override
+ public void admit() {
+ // No queueing by default
+ }
+
+ @Override
+ public void exit() {
+ // No queueing by default
+ }
+
+ @Override
+ public boolean hasQueue() { return false; }
+
+ @Override
+ public String queueName() { return null; }
+ }
+
+ BootStrapContext bootStrapContext;
+ public long memoryPerNode;
--- End diff --
final?
---
