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[apache#3856] feat(core): Support embedded JDBC storage backend (apac…
…he#3922) ### What changes were proposed in this pull request? Add support for an embedded JDBC storage backend. ### Why are the changes needed? We plan to replace RocksDB KV backend with an embedded JDBC backend as the default storage backend. Fix: apache#3856 ### Does this PR introduce _any_ user-facing change? N/A ### How was this patch tested? Existing UT
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19 changes: 19 additions & 0 deletions
19
core/src/main/java/com/datastrato/gravitino/storage/relational/JDBCDatabase.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| /* | ||
| * Copyright 2024 Datastrato Pvt Ltd. | ||
| * This software is licensed under the Apache License version 2. | ||
| */ | ||
| package com.datastrato.gravitino.storage.relational; | ||
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| import com.datastrato.gravitino.Config; | ||
| import java.io.Closeable; | ||
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| public interface JDBCDatabase extends Closeable { | ||
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| /** | ||
| * Initializes the Relational database environment with the provided configuration. | ||
| * | ||
| * @param config The configuration for the database backend. | ||
| * @throws RuntimeException | ||
| */ | ||
| void initialize(Config config); | ||
| } |
102 changes: 102 additions & 0 deletions
102
core/src/main/java/com/datastrato/gravitino/storage/relational/database/H2Database.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* | ||
| * Copyright 2024 Datastrato Pvt Ltd. | ||
| * This software is licensed under the Apache License version 2. | ||
| */ | ||
| package com.datastrato.gravitino.storage.relational.database; | ||
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| import com.datastrato.gravitino.Config; | ||
| import com.datastrato.gravitino.Configs; | ||
| import com.datastrato.gravitino.storage.relational.JDBCDatabase; | ||
| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.Paths; | ||
| import java.sql.Connection; | ||
| import java.sql.DriverManager; | ||
| import java.sql.Statement; | ||
| import org.apache.commons.io.FileUtils; | ||
| import org.apache.commons.lang3.StringUtils; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| public class H2Database implements JDBCDatabase { | ||
| private static final Logger LOG = LoggerFactory.getLogger(H2Database.class); | ||
| private String h2ConnectionUri; | ||
| private String username; | ||
| private String password; | ||
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| @Override | ||
| public void initialize(Config config) { | ||
| this.h2ConnectionUri = startH2Database(config); | ||
| } | ||
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| public String startH2Database(Config config) { | ||
| String gravitinoHome = System.getenv("GRAVITINO_HOME"); | ||
| String storagePath = getStoragePath(config); | ||
| String originalJDBCUrl = config.get(Configs.ENTITY_RELATIONAL_JDBC_BACKEND_URL); | ||
| this.username = config.get(Configs.ENTITY_RELATIONAL_JDBC_BACKEND_USER); | ||
| this.password = config.get(Configs.ENTITY_RELATIONAL_JDBC_BACKEND_PASSWORD); | ||
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| String connectionUrl = constructH2URI(originalJDBCUrl, storagePath); | ||
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| try (Connection connection = DriverManager.getConnection(connectionUrl, username, password); | ||
| Statement statement = connection.createStatement()) { | ||
| String sqlContent = | ||
| FileUtils.readFileToString( | ||
| new File(gravitinoHome + "/scripts/h2/schema-h2.sql"), StandardCharsets.UTF_8); | ||
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| statement.execute(sqlContent); | ||
| } catch (Exception e) { | ||
| LOG.error("Failed to create table for H2 database.", e); | ||
| throw new RuntimeException("Failed to create table for H2 database.", e); | ||
| } | ||
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| config.set(Configs.ENTITY_RELATIONAL_JDBC_BACKEND_URL, connectionUrl); | ||
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| return connectionUrl; | ||
| } | ||
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| private static String constructH2URI(String originURI, String storagePath) { | ||
| if (!originURI.contains(":file:")) { | ||
| originURI = "jdbc:h2:file:" + storagePath; | ||
| } | ||
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| if (!originURI.contains("DB_CLOSE_DELAY")) { | ||
| originURI = originURI + ";DB_CLOSE_DELAY=-1"; | ||
| } | ||
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| if (!originURI.contains("MODE")) { | ||
| originURI = originURI + ";MODE=MYSQL"; | ||
| } | ||
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| return originURI; | ||
| } | ||
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| private static String getStoragePath(Config config) { | ||
| String dbPath = config.get(Configs.ENTITY_RELATIONAL_JDBC_BACKEND_PATH); | ||
| if (StringUtils.isBlank(dbPath)) { | ||
| return Configs.DEFAULT_RELATIONAL_JDBC_BACKEND_PATH; | ||
| } | ||
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| Path path = Paths.get(dbPath); | ||
| // Relative Path | ||
| if (!path.isAbsolute()) { | ||
| path = Paths.get(System.getenv("GRAVITINO_HOME"), dbPath); | ||
| return path.toString(); | ||
| } | ||
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| return dbPath; | ||
| } | ||
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| @Override | ||
| public void close() throws IOException { | ||
| try (Connection connection = DriverManager.getConnection(h2ConnectionUri, username, password); | ||
| Statement statement = connection.createStatement()) { | ||
| statement.execute("SHUTDOWN"); | ||
| } catch (Exception e) { | ||
| LOG.error("Failed to shutdown H2 database.", e); | ||
| throw new RuntimeException("Failed to shutdown H2 database.", e); | ||
| } | ||
| } | ||
| } |
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