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Implement skeleton for coordinator-only execute
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141 changes: 141 additions & 0 deletions
141
core/trino-main/src/main/java/io/trino/operator/SimpleTableExecuteOperator.java
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|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| /* | ||
| * 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 io.trino.Session; | ||
| import io.trino.metadata.Metadata; | ||
| import io.trino.metadata.TableExecuteHandle; | ||
| import io.trino.spi.Page; | ||
| import io.trino.sql.planner.plan.PlanNodeId; | ||
|
|
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| import static com.google.common.base.Preconditions.checkState; | ||
| import static java.util.Objects.requireNonNull; | ||
|
|
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| public class SimpleTableExecuteOperator | ||
| implements Operator | ||
| { | ||
| private static final Page PAGE = new Page(0); | ||
|
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| public static class SimpleTableExecuteOperatorOperatorFactory | ||
| implements OperatorFactory | ||
| { | ||
| private final int operatorId; | ||
| private final PlanNodeId planNodeId; | ||
| private final Metadata metadata; | ||
| private final Session session; | ||
| private final TableExecuteHandle executeHandle; | ||
| private boolean closed; | ||
|
|
||
| public SimpleTableExecuteOperatorOperatorFactory( | ||
| int operatorId, | ||
| PlanNodeId planNodeId, | ||
| Metadata metadata, | ||
| Session session, | ||
| TableExecuteHandle executeHandle) | ||
| { | ||
| this.operatorId = operatorId; | ||
| this.planNodeId = requireNonNull(planNodeId, "planNodeId is null"); | ||
| this.metadata = requireNonNull(metadata, "planNodeId is null"); | ||
| this.session = requireNonNull(session, "planNodeId is null"); | ||
| this.executeHandle = requireNonNull(executeHandle, "executeHandle is null"); | ||
| } | ||
|
|
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| @Override | ||
| public Operator createOperator(DriverContext driverContext) | ||
| { | ||
| checkState(!closed, "Factory is already closed"); | ||
| OperatorContext context = driverContext.addOperatorContext(operatorId, planNodeId, SimpleTableExecuteOperator.class.getSimpleName()); | ||
| return new SimpleTableExecuteOperator( | ||
| context, | ||
| metadata, | ||
| session, | ||
| executeHandle); | ||
| } | ||
|
|
||
| @Override | ||
| public void noMoreOperators() | ||
| { | ||
| closed = true; | ||
| } | ||
|
|
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| @Override | ||
| public OperatorFactory duplicate() | ||
| { | ||
| return new SimpleTableExecuteOperatorOperatorFactory( | ||
| operatorId, | ||
| planNodeId, | ||
| metadata, | ||
| session, | ||
| executeHandle); | ||
| } | ||
| } | ||
|
|
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| private final OperatorContext operatorContext; | ||
| private final Metadata metadata; | ||
| private final Session session; | ||
| private final TableExecuteHandle executeHandle; | ||
|
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| private boolean finished; | ||
|
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| public SimpleTableExecuteOperator( | ||
| OperatorContext operatorContext, | ||
| Metadata metadata, | ||
| Session session, | ||
| TableExecuteHandle executeHandle) | ||
| { | ||
| this.operatorContext = requireNonNull(operatorContext, "operatorContext is null"); | ||
| this.metadata = requireNonNull(metadata, "metadata is null"); | ||
| this.session = requireNonNull(session, "session is null"); | ||
| this.executeHandle = requireNonNull(executeHandle, "executeHandle is null"); | ||
| } | ||
|
|
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| @Override | ||
| public OperatorContext getOperatorContext() | ||
| { | ||
| return operatorContext; | ||
| } | ||
|
|
||
| @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() | ||
| { | ||
| if (finished) { | ||
| return null; | ||
| } | ||
|
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| metadata.executeTableExecute(session, executeHandle); | ||
| finished = true; | ||
| return PAGE; | ||
| } | ||
|
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| @Override | ||
| public void finish() {} | ||
|
|
||
| @Override | ||
| public boolean isFinished() | ||
| { | ||
| return finished; | ||
| } | ||
| } |
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