| /* |
| * 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.wayang.jdbc.platform; |
| |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.optimizer.costs.LoadProfileToTimeConverter; |
| import org.apache.wayang.core.optimizer.costs.LoadToTimeConverter; |
| import org.apache.wayang.core.optimizer.costs.TimeToCostConverter; |
| import org.apache.wayang.core.platform.ChannelDescriptor; |
| import org.apache.wayang.core.platform.Executor; |
| import org.apache.wayang.core.platform.Platform; |
| import org.apache.wayang.core.util.ReflectionUtils; |
| import org.apache.wayang.jdbc.channels.SqlQueryChannel; |
| import org.apache.wayang.jdbc.execution.DatabaseDescriptor; |
| import org.apache.wayang.jdbc.execution.JdbcExecutor; |
| |
| import java.sql.Connection; |
| |
| /** |
| * {@link Platform} implementation for a JDBC-accessible database. |
| */ |
| public abstract class JdbcPlatformTemplate extends Platform { |
| |
| public final String cpuMhzProperty = String.format("wayang.%s.cpu.mhz", this.getPlatformId()); |
| |
| public final String coresProperty = String.format("wayang.%s.cores", this.getPlatformId()); |
| |
| public final String jdbcUrlProperty = String.format("wayang.%s.jdbc.url", this.getPlatformId()); |
| |
| public final String jdbcUserProperty = String.format("wayang.%s.jdbc.user", this.getPlatformId()); |
| |
| public final String jdbcPasswordProperty = String.format("wayang.%s.jdbc.password", this.getPlatformId()); |
| |
| private String getDefaultConfigurationFile() { |
| return String.format("wayang-%s-defaults.properties", this.getPlatformId()); |
| } |
| |
| /** |
| * {@link ChannelDescriptor} for {@link SqlQueryChannel}s with this instance. |
| */ |
| private final SqlQueryChannel.Descriptor sqlQueryChannelDescriptor = new SqlQueryChannel.Descriptor(this); |
| |
| public Connection getConnection() { |
| return connection; |
| } |
| |
| private Connection connection = null; |
| |
| protected JdbcPlatformTemplate(String platformName, String configName) { |
| super(platformName, configName); |
| } |
| |
| @Override |
| public void configureDefaults(Configuration configuration) { |
| configuration.load(ReflectionUtils.loadResource(this.getDefaultConfigurationFile())); |
| } |
| |
| @Override |
| public Executor.Factory getExecutorFactory() { |
| return job -> new JdbcExecutor(this, job); |
| } |
| |
| @Override |
| public LoadProfileToTimeConverter createLoadProfileToTimeConverter(Configuration configuration) { |
| int cpuMhz = (int) configuration.getLongProperty(this.cpuMhzProperty); |
| int numCores = (int) configuration.getLongProperty(this.coresProperty); |
| return LoadProfileToTimeConverter.createDefault( |
| LoadToTimeConverter.createLinearCoverter(1 / (numCores * cpuMhz * 1000.)), |
| LoadToTimeConverter.createLinearCoverter(0), |
| LoadToTimeConverter.createLinearCoverter(0), |
| (cpuEstimate, diskEstimate, networkEstimate) -> cpuEstimate.plus(diskEstimate).plus(networkEstimate) |
| ); |
| } |
| |
| @Override |
| public TimeToCostConverter createTimeToCostConverter(Configuration configuration) { |
| return new TimeToCostConverter( |
| configuration.getDoubleProperty(String.format("wayang.%s.costs.fix", this.getPlatformId())), |
| configuration.getDoubleProperty(String.format("wayang.%s.costs.per-ms", this.getPlatformId())) |
| ); |
| } |
| |
| /** |
| * Provide a unique identifier for this kind of platform. Should consist of alphanumerical characters only. |
| * |
| * @return the platform ID |
| */ |
| public String getPlatformId() { |
| return this.getConfigurationName(); |
| } |
| |
| /** |
| * Provide the name of the JDBC driver {@link Class} for this instance. |
| * |
| * @return the driver {@link Class} name |
| */ |
| protected abstract String getJdbcDriverClassName(); |
| |
| /** |
| * Retrieve a {@link SqlQueryChannel.Descriptor} for this instance. |
| * |
| * @return the {@link SqlQueryChannel.Descriptor} |
| */ |
| public SqlQueryChannel.Descriptor getSqlQueryChannelDescriptor() { |
| return this.sqlQueryChannelDescriptor; |
| } |
| |
| /** |
| * Creates a new {@link DatabaseDescriptor} for this instance and the given {@link Configuration}. |
| * |
| * @param configuration provides configuration information for the result |
| * @return the {@link DatabaseDescriptor} |
| */ |
| public DatabaseDescriptor createDatabaseDescriptor(Configuration configuration) { |
| return new DatabaseDescriptor( |
| configuration.getStringProperty(this.jdbcUrlProperty), |
| configuration.getStringProperty(this.jdbcUserProperty, null), |
| configuration.getStringProperty(this.jdbcPasswordProperty, null), |
| this.getJdbcDriverClassName() |
| ); |
| } |
| } |