Github user Vlad-Storona commented on a diff in the pull request:
https://github.com/apache/drill/pull/774#discussion_r148567693
--- Diff:
contrib/storage-opentsdb/src/main/java/org/apache/drill/exec/store/openTSDB/OpenTSDBGroupScan.java
---
@@ -0,0 +1,220 @@
+/*
+ * 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.store.openTSDB;
+
+import com.fasterxml.jackson.annotation.JacksonInject;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ListMultimap;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import org.apache.drill.common.exceptions.ExecutionSetupException;
+import org.apache.drill.common.expression.SchemaPath;
+import org.apache.drill.exec.physical.EndpointAffinity;
+import org.apache.drill.exec.physical.base.AbstractGroupScan;
+import org.apache.drill.exec.physical.base.GroupScan;
+import org.apache.drill.exec.physical.base.PhysicalOperator;
+import org.apache.drill.exec.physical.base.ScanStats;
+import org.apache.drill.exec.proto.CoordinationProtos.DrillbitEndpoint;
+import org.apache.drill.exec.store.StoragePluginRegistry;
+import
org.apache.drill.exec.store.openTSDB.OpenTSDBSubScan.OpenTSDBSubScanSpec;
+import org.apache.drill.exec.store.schedule.AffinityCreator;
+import org.apache.drill.exec.store.schedule.AssignmentCreator;
+import org.apache.drill.exec.store.schedule.CompleteWork;
+import org.apache.drill.exec.store.schedule.EndpointByteMap;
+import org.apache.drill.exec.store.schedule.EndpointByteMapImpl;
+
+import java.io.IOException;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+@JsonTypeName("openTSDB-scan")
+public class OpenTSDBGroupScan extends AbstractGroupScan {
+
+ private static final long DEFAULT_TABLET_SIZE = 1000;
+
+ private OpenTSDBStoragePluginConfig storagePluginConfig;
+ private OpenTSDBScanSpec openTSDBScanSpec;
+ private OpenTSDBStoragePlugin storagePlugin;
+
+ private ListMultimap<Integer, OpenTSDBWork> assignments;
+ private List<SchemaPath> columns;
+ private List<OpenTSDBWork> openTSDBWorkList = Lists.newArrayList();
+ private List<EndpointAffinity> affinities;
+
+ private boolean filterPushedDown = false;
+
+ @JsonCreator
+ public OpenTSDBGroupScan(@JsonProperty("openTSDBScanSpec")
OpenTSDBScanSpec openTSDBScanSpec,
+ @JsonProperty("storage")
OpenTSDBStoragePluginConfig openTSDBStoragePluginConfig,
+ @JsonProperty("columns") List<SchemaPath>
columns,
+ @JacksonInject StoragePluginRegistry
pluginRegistry) throws IOException, ExecutionSetupException {
+ this((OpenTSDBStoragePlugin)
pluginRegistry.getPlugin(openTSDBStoragePluginConfig), openTSDBScanSpec,
columns);
+ }
+
+ public OpenTSDBGroupScan(OpenTSDBStoragePlugin storagePlugin,
+ OpenTSDBScanSpec scanSpec, List<SchemaPath>
columns) {
+ super((String) null);
+ this.storagePlugin = storagePlugin;
+ this.storagePluginConfig = storagePlugin.getConfig();
+ this.openTSDBScanSpec = scanSpec;
+ this.columns = columns == null || columns.size() == 0 ? ALL_COLUMNS :
columns;
+ init();
+ }
+
+ /**
+ * Private constructor, used for cloning.
+ *
+ * @param that The OpenTSDBGroupScan to clone
+ */
+ private OpenTSDBGroupScan(OpenTSDBGroupScan that) {
+ super((String) null);
+ this.columns = that.columns;
+ this.openTSDBScanSpec = that.openTSDBScanSpec;
+ this.storagePlugin = that.storagePlugin;
+ this.storagePluginConfig = that.storagePluginConfig;
+ this.filterPushedDown = that.filterPushedDown;
+ this.openTSDBWorkList = that.openTSDBWorkList;
+ this.assignments = that.assignments;
+ init();
+ }
+
+ private void init() {
+ Collection<DrillbitEndpoint> endpoints =
storagePlugin.getContext().getBits();
+ Map<String, DrillbitEndpoint> endpointMap = Maps.newHashMap();
+
+ for (DrillbitEndpoint endpoint : endpoints) {
+ endpointMap.put(endpoint.getAddress(), endpoint);
+ }
+ }
+
+ @Override
+ public List<EndpointAffinity> getOperatorAffinity() {
+ if (affinities == null) {
+ affinities = AffinityCreator.getAffinityMap(openTSDBWorkList);
+ }
+ return affinities;
+ }
+
+ @Override
+ public int getMaxParallelizationWidth() {
+ return openTSDBWorkList.size();
+ }
+
+ @Override
+ public void applyAssignments(List<DrillbitEndpoint> incomingEndpoints) {
+ assignments = AssignmentCreator.getMappings(incomingEndpoints,
openTSDBWorkList);
+ }
+
+ @Override
+ public OpenTSDBSubScan getSpecificScan(int minorFragmentId) {
+ List<OpenTSDBSubScanSpec> scanSpecList = Lists.newArrayList();
+ scanSpecList.add(new OpenTSDBSubScanSpec(getTableName()));
+ return new OpenTSDBSubScan(storagePlugin, storagePluginConfig,
scanSpecList, this.columns);
+ }
+
+ @Override
+ public ScanStats getScanStats() {
+ //magic number ?
+ long recordCount = 100000L * openTSDBWorkList.size();
--- End diff --
It is a weird calculation, I will rewrite it.
---
