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Enable connector to perform materialized view refresh itself
Introduce ConnectorMetadata#refreshMaterializedView that will be called when materialized view refresh is delegated to connector.
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151 changes: 151 additions & 0 deletions
151
core/trino-main/src/main/java/io/trino/operator/RefreshMaterializedViewOperator.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| /* | ||
| * 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.operator; | ||
|
|
||
| import com.google.common.util.concurrent.ListenableFuture; | ||
| import io.trino.metadata.Metadata; | ||
| import io.trino.metadata.QualifiedObjectName; | ||
| import io.trino.spi.Page; | ||
| import io.trino.sql.planner.plan.PlanNodeId; | ||
|
|
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| import javax.annotation.Nullable; | ||
|
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| import static com.google.common.base.Preconditions.checkState; | ||
| import static io.airlift.concurrent.MoreFutures.getDone; | ||
| import static java.util.Objects.requireNonNull; | ||
|
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| public class RefreshMaterializedViewOperator | ||
| implements Operator | ||
| { | ||
| public static class RefreshMaterializedViewOperatorFactory | ||
| implements OperatorFactory | ||
| { | ||
| private final int operatorId; | ||
| private final PlanNodeId planNodeId; | ||
| private final Metadata metadata; | ||
| private final QualifiedObjectName viewName; | ||
| private boolean closed; | ||
|
|
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| public RefreshMaterializedViewOperatorFactory(int operatorId, PlanNodeId planNodeId, Metadata metadata, QualifiedObjectName viewName) | ||
| { | ||
| this.operatorId = operatorId; | ||
| this.planNodeId = requireNonNull(planNodeId, "planNodeId is null"); | ||
| this.metadata = requireNonNull(metadata, "metadata is null"); | ||
| this.viewName = requireNonNull(viewName, "viewName is null"); | ||
| } | ||
|
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| @Override | ||
| public Operator createOperator(DriverContext driverContext) | ||
| { | ||
| checkState(!closed, "Factory is already closed"); | ||
| OperatorContext operatorContext = driverContext.addOperatorContext(operatorId, planNodeId, ValuesOperator.class.getSimpleName()); | ||
| return new RefreshMaterializedViewOperator(operatorContext, metadata, viewName); | ||
| } | ||
|
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| @Override | ||
| public void noMoreOperators() | ||
| { | ||
| closed = true; | ||
| } | ||
|
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| @Override | ||
| public OperatorFactory duplicate() | ||
| { | ||
| return new RefreshMaterializedViewOperatorFactory(operatorId, planNodeId, metadata, viewName); | ||
| } | ||
| } | ||
|
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| private final OperatorContext operatorContext; | ||
| private final Metadata metadata; | ||
| private final QualifiedObjectName viewName; | ||
| @Nullable | ||
| private ListenableFuture<?> refreshFuture; | ||
| private boolean closed; | ||
|
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| public RefreshMaterializedViewOperator(OperatorContext operatorContext, Metadata metadata, QualifiedObjectName viewName) | ||
| { | ||
| this.operatorContext = requireNonNull(operatorContext, "operatorContext is null"); | ||
| this.metadata = requireNonNull(metadata, "metadata is null"); | ||
| this.viewName = requireNonNull(viewName, "viewName is null"); | ||
| } | ||
|
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| @Override | ||
| public OperatorContext getOperatorContext() | ||
| { | ||
| return operatorContext; | ||
| } | ||
|
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| @Override | ||
| public ListenableFuture<?> isBlocked() | ||
| { | ||
| if (refreshFuture == null) { | ||
| return NOT_BLOCKED; | ||
| } | ||
|
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| return refreshFuture; | ||
| } | ||
|
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| @Override | ||
| public boolean needsInput() | ||
| { | ||
| return false; | ||
| } | ||
|
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| @Override | ||
| public void addInput(Page page) | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| @Override | ||
| public Page getOutput() | ||
| { | ||
| return null; | ||
| } | ||
|
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| @Override | ||
| public void finish() | ||
| { | ||
| } | ||
|
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| @Override | ||
| public void close() | ||
| { | ||
| if (refreshFuture != null) { | ||
| refreshFuture.cancel(false); | ||
| } | ||
|
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| closed = true; | ||
| } | ||
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| @Override | ||
| public boolean isFinished() | ||
| { | ||
| if (closed) { | ||
| return true; | ||
| } | ||
|
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| if (refreshFuture == null) { | ||
| // perform refresh in isFinished method. getOutput method won't be called by Driver | ||
| // since RefreshMaterializedViewOperator is last operator in pipeline | ||
| refreshFuture = metadata.refreshMaterializedView(operatorContext.getSession(), viewName); | ||
| } | ||
|
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| if (refreshFuture.isDone()) { | ||
| getDone(refreshFuture); | ||
| } | ||
|
|
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| return refreshFuture.isDone(); | ||
| } | ||
| } |
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