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Add DelegatingRowExpressionOptimizer
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103 changes: 103 additions & 0 deletions
103
...to-main/src/main/java/com/facebook/presto/sql/expressions/ExpressionOptimizerManager.java
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| /* | ||
| * 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 com.facebook.presto.sql.expressions; | ||
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| import com.facebook.presto.metadata.FunctionAndTypeManager; | ||
| import com.facebook.presto.nodeManager.PluginNodeManager; | ||
| import com.facebook.presto.spi.NodeManager; | ||
| import com.facebook.presto.spi.relation.ExpressionOptimizer; | ||
| import com.facebook.presto.spi.relation.ExpressionOptimizerProvider; | ||
| import com.facebook.presto.spi.sql.planner.ExpressionOptimizerContext; | ||
| import com.facebook.presto.spi.sql.planner.ExpressionOptimizerFactory; | ||
| import com.facebook.presto.sql.relational.FunctionResolution; | ||
| import com.facebook.presto.sql.relational.RowExpressionOptimizer; | ||
|
|
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| import javax.inject.Inject; | ||
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|
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| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.io.UncheckedIOException; | ||
| import java.util.HashMap; | ||
| import java.util.Map; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.atomic.AtomicReference; | ||
|
|
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| import static com.facebook.presto.util.PropertiesUtil.loadProperties; | ||
| import static com.google.common.base.Preconditions.checkArgument; | ||
| import static com.google.common.base.Strings.isNullOrEmpty; | ||
| import static java.util.Objects.requireNonNull; | ||
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| public class ExpressionOptimizerManager | ||
| implements ExpressionOptimizerProvider | ||
| { | ||
| private static final File EXPRESSION_MANAGER_CONFIGURATION = new File("etc/expression-manager.properties"); | ||
| public static final String EXPRESSION_MANAGER_FACTORY_NAME = "expression-manager-factory.name"; | ||
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| private final Map<String, ExpressionOptimizerFactory> expressionOptimizerFactories = new ConcurrentHashMap<>(); | ||
| private final AtomicReference<ExpressionOptimizer> rowExpressionInterpreter = new AtomicReference<>(); | ||
| private final NodeManager nodeManager; | ||
| private final FunctionAndTypeManager functionAndTypeManager; | ||
| private final FunctionResolution functionResolution; | ||
| private final ExpressionOptimizer defaultExpressionOptimizer; | ||
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| @Inject | ||
| public ExpressionOptimizerManager(PluginNodeManager nodeManager, FunctionAndTypeManager functionAndTypeManager) | ||
| { | ||
| requireNonNull(nodeManager, "nodeManager is null"); | ||
| this.nodeManager = requireNonNull(nodeManager, "nodeManager is null"); | ||
| this.functionAndTypeManager = requireNonNull(functionAndTypeManager, "functionAndTypeManager is null"); | ||
| this.functionResolution = new FunctionResolution(functionAndTypeManager.getFunctionAndTypeResolver()); | ||
| this.defaultExpressionOptimizer = new RowExpressionOptimizer(functionAndTypeManager); | ||
| rowExpressionInterpreter.set(defaultExpressionOptimizer); | ||
| } | ||
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| public void loadExpressionOptimizerFactory() | ||
| { | ||
| try { | ||
| if (EXPRESSION_MANAGER_CONFIGURATION.exists()) { | ||
| Map<String, String> properties = new HashMap<>(loadProperties(EXPRESSION_MANAGER_CONFIGURATION)); | ||
| loadExpressionOptimizerFactory(properties); | ||
| } | ||
| } | ||
| catch (IOException e) { | ||
| throw new UncheckedIOException("Failed to load expression manager configuration", e); | ||
| } | ||
| } | ||
|
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| private void loadExpressionOptimizerFactory(Map<String, String> properties) | ||
| { | ||
| properties = new HashMap<>(properties); | ||
| String factoryName = properties.remove(EXPRESSION_MANAGER_FACTORY_NAME); | ||
| checkArgument(!isNullOrEmpty(factoryName), "%s does not contain %s", EXPRESSION_MANAGER_CONFIGURATION, EXPRESSION_MANAGER_FACTORY_NAME); | ||
| checkArgument( | ||
| rowExpressionInterpreter.compareAndSet( | ||
| defaultExpressionOptimizer, | ||
| expressionOptimizerFactories.get(factoryName).createOptimizer(properties, new ExpressionOptimizerContext(nodeManager, functionAndTypeManager, functionResolution))), | ||
| "ExpressionManager is already loaded"); | ||
| } | ||
|
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| public void addExpressionOptimizerFactory(ExpressionOptimizerFactory expressionOptimizerFactory) | ||
| { | ||
| String name = expressionOptimizerFactory.getName(); | ||
| checkArgument( | ||
| this.expressionOptimizerFactories.putIfAbsent(name, expressionOptimizerFactory) == null, | ||
| "ExpressionOptimizerFactory %s is already registered", name); | ||
| } | ||
|
|
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| @Override | ||
| public ExpressionOptimizer getExpressionOptimizer() | ||
| { | ||
| return rowExpressionInterpreter.get(); | ||
| } | ||
| } |
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