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Support for killing individual task if cluster is out of memory
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core/trino-main/src/main/java/io/trino/memory/KillTarget.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /* | ||
| * Licensed 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 io.trino.memory; | ||
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|
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| import com.google.common.collect.ImmutableSet; | ||
| import io.trino.execution.TaskId; | ||
| import io.trino.spi.QueryId; | ||
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|
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| import java.util.Objects; | ||
| import java.util.Optional; | ||
| import java.util.Set; | ||
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| import static com.google.common.base.MoreObjects.toStringHelper; | ||
| import static com.google.common.base.Preconditions.checkState; | ||
| import static java.util.Objects.requireNonNull; | ||
|
|
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| public class KillTarget | ||
| { | ||
| // Either query id or tasks list must be set | ||
| // If query id is set then whole query will be killed; individual tasks otherwise. | ||
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| private final Optional<QueryId> query; | ||
| private final Set<TaskId> tasks; | ||
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| public static KillTarget wholeQuery(QueryId queryId) | ||
| { | ||
| return new KillTarget(Optional.of(queryId), ImmutableSet.of()); | ||
| } | ||
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| public static KillTarget selectedTasks(Set<TaskId> tasks) | ||
| { | ||
| return new KillTarget(Optional.empty(), tasks); | ||
| } | ||
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| private KillTarget(Optional<QueryId> query, Set<TaskId> tasks) | ||
| { | ||
| requireNonNull(query, "query is null"); | ||
| requireNonNull(tasks, "tasks is null"); | ||
| if ((query.isPresent() && !tasks.isEmpty()) || (query.isEmpty() && tasks.isEmpty())) { | ||
| throw new IllegalArgumentException("either query or tasks must be set"); | ||
| } | ||
| this.query = query; | ||
| this.tasks = ImmutableSet.copyOf(tasks); | ||
| } | ||
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| public boolean isWholeQuery() | ||
| { | ||
| return query.isPresent(); | ||
| } | ||
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| public QueryId getQuery() | ||
| { | ||
| return query.orElseThrow(() -> new IllegalStateException("query not set in KillTarget: " + this)); | ||
| } | ||
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| public Set<TaskId> getTasks() | ||
| { | ||
| checkState(!tasks.isEmpty(), "tasks not set in KillTarget: " + this); | ||
| return tasks; | ||
| } | ||
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| @Override | ||
| public boolean equals(Object o) | ||
| { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| KillTarget that = (KillTarget) o; | ||
| return Objects.equals(query, that.query) && Objects.equals(tasks, that.tasks); | ||
| } | ||
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| @Override | ||
| public int hashCode() | ||
| { | ||
| return Objects.hash(query, tasks); | ||
| } | ||
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| @Override | ||
| public String toString() | ||
| { | ||
| return toStringHelper(this) | ||
| .add("query", query) | ||
| .add("tasks", tasks) | ||
| .toString(); | ||
| } | ||
| } |
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