yuqi1129 commented on code in PR #12541: URL: https://github.com/apache/gravitino/pull/12541#discussion_r3976602801
########## spark-connector/spark-common/src/main/java/org/apache/gravitino/spark/connector/plugin/restcatalog/lance/LanceRESTCatalogProvider.java: ########## @@ -0,0 +1,121 @@ +/* + * 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.gravitino.spark.connector.plugin.restcatalog.lance; + +import com.google.common.base.Preconditions; +import com.google.common.collect.ImmutableMap; +import java.io.Closeable; +import java.io.IOException; +import java.util.ArrayList; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import org.apache.commons.lang3.StringUtils; +import org.apache.gravitino.spark.connector.plugin.restcatalog.LakehouseRESTCatalogProvider; +import org.lance.namespace.client.apache.ApiClient; +import org.lance.namespace.client.apache.ApiException; +import org.lance.namespace.client.apache.api.NamespaceApi; +import org.lance.namespace.model.ListNamespacesResponse; + +/** Discovers and configures Lance REST catalogs. */ +public class LanceRESTCatalogProvider implements LakehouseRESTCatalogProvider { + + static final String FORMAT = "lance"; + static final String CATALOG_CLASS = "org.lance.spark.LanceNamespaceSparkCatalog"; + static final String SPARK_EXTENSIONS = "org.lance.spark.extensions.LanceSparkSessionExtensions"; + + private static final String ROOT_NAMESPACE_ID = "$"; + private static final String NAMESPACE_DELIMITER = "$"; + + @Override + public String format() { + return FORMAT; + } + + @Override + public List<String> listCatalogs(String uri, Map<String, String> catalogProperties) { + List<String> catalogs = new ArrayList<>(); + Set<String> seenPageTokens = new HashSet<>(); + String pageToken = null; + + ApiClient apiClient = new ApiClient().setBasePath(normalizeUri(uri)); + try (Closeable httpClient = getHttpClient(apiClient)) { + NamespaceApi namespaceApi = new NamespaceApi(apiClient); + do { + ListNamespacesResponse response = + namespaceApi.listNamespaces(ROOT_NAMESPACE_ID, NAMESPACE_DELIMITER, pageToken, null); + Preconditions.checkState(response != null, "Lance REST server returned an empty response"); + Preconditions.checkState( + response.getNamespaces() != null, + "Lance REST server returned a response without namespaces"); + catalogs.addAll(response.getNamespaces()); + + pageToken = StringUtils.trimToNull(response.getPageToken()); + Preconditions.checkState( + pageToken == null || seenPageTokens.add(pageToken), + "Lance REST server returned repeated page token: %s", + pageToken); + } while (pageToken != null); + } catch (ApiException | IOException e) { + throw new IllegalStateException("Failed to list catalogs from Lance REST server " + uri, e); + } + + return catalogs; + } + + @Override + public String catalogClassName() { + return CATALOG_CLASS; + } + + @Override + public Map<String, String> generatedCatalogProperties(String uri, String advertisedCatalogName) { Review Comment: What is the meaning of `advertised` here？ ########## spark-connector/spark-common/src/main/java/org/apache/gravitino/spark/connector/plugin/restcatalog/GravitinoLakehouseRESTDiscoveryDriverPlugin.java: ########## @@ -0,0 +1,420 @@ +/* + * 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.gravitino.spark.connector.plugin.restcatalog; + +import static org.apache.gravitino.spark.connector.ConnectorConstants.COMMA; +import static org.apache.gravitino.spark.connector.utils.ConnectorUtil.removeDuplicateSparkExtensions; + +import com.google.common.annotations.VisibleForTesting; +import com.google.common.base.Preconditions; +import java.lang.reflect.InvocationTargetException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.LinkedHashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.TreeMap; +import java.util.regex.Matcher; +import java.util.regex.Pattern; +import org.apache.commons.lang3.StringUtils; +import org.apache.gravitino.spark.connector.plugin.GravitinoSparkPlugin; +import org.apache.spark.SparkConf; +import org.apache.spark.SparkContext; +import org.apache.spark.api.plugin.DriverPlugin; +import org.apache.spark.api.plugin.PluginContext; +import org.apache.spark.sql.catalyst.parser.CatalystSqlParser$; +import org.apache.spark.sql.internal.StaticSQLConf; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import scala.Tuple2; +import scala.collection.Seq; + +class GravitinoLakehouseRESTDiscoveryDriverPlugin implements DriverPlugin { + + @VisibleForTesting + static final String REGISTRATION_POLICY_CONFIG = "spark.sql.gravitino.REST.registrationPolicy"; + + private static final Logger LOG = + LoggerFactory.getLogger(GravitinoLakehouseRESTDiscoveryDriverPlugin.class); + private static final String GRAVITINO_PREFIX = "spark.sql.gravitino."; + private static final String SPARK_CATALOG_PREFIX = "spark.sql.catalog."; + private static final String URI_SUFFIX = "REST.uri"; + private static final String CATALOG_PROPERTIES_INFIX = "REST.catalogProperties."; + private static final Pattern PROVIDER_URI_PATTERN = + Pattern.compile("^spark\\.sql\\.gravitino\\.([A-Za-z][A-Za-z0-9]*)REST\\.uri$"); + private static final CatalogRegistrationPolicy DEFAULT_POLICY = (format, catalogName) -> true; + + GravitinoLakehouseRESTDiscoveryDriverPlugin() {} + + @Override + public Map<String, String> init(SparkContext sc, PluginContext pluginContext) { + initialize(sc.conf()); + return Collections.emptyMap(); + } + + @VisibleForTesting + void initialize(SparkConf sparkConf) { + initialize(sparkConf, BuiltinRESTCatalogProviders.providerClassNames()); + } + + @VisibleForTesting + void initialize(SparkConf sparkConf, Map<String, String> providerClassNames) { + validatePluginOrder(sparkConf); + SparkConf userConf = sparkConf.clone(); + Map<String, String> activeFormats = findActiveFormats(userConf); + if (activeFormats.isEmpty()) { + return; + } + + ClassLoader classLoader = contextClassLoader(); + CatalogRegistrationPolicy policy = loadRegistrationPolicy(userConf, classLoader); + List<CatalogRegistration> registrations = new ArrayList<>(); + Set<String> registeredNames = new LinkedHashSet<>(); + Set<String> extensions = new LinkedHashSet<>(); + + activeFormats.forEach( + (format, uri) -> { + LakehouseRESTCatalogProvider provider = + loadProvider(format, providerClassNames, classLoader); + validateProviderRuntime(provider, classLoader); + + Map<String, String> globalProperties = extractCatalogProperties(userConf, format); + List<String> advertisedCatalogs = + provider.listCatalogs(uri, Collections.unmodifiableMap(globalProperties)); + Preconditions.checkState( + advertisedCatalogs != null, + "Lakehouse REST catalog provider %s returned a null catalog list", + format); + + List<String> sortedCatalogs = new ArrayList<>(advertisedCatalogs); + Collections.sort(sortedCatalogs); Review Comment: Why do we need to sort them? ########## spark-connector/spark-common/src/main/java/org/apache/gravitino/spark/connector/plugin/restcatalog/CatalogRegistrationPolicy.java: ########## @@ -0,0 +1,47 @@ +/* + * 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.gravitino.spark.connector.plugin.restcatalog; + +import org.apache.gravitino.annotation.DeveloperApi; + +/** Decides whether an advertised REST catalog is registered, and under what Spark name. */ +@DeveloperApi +public interface CatalogRegistrationPolicy { + + /** + * Returns whether to register an advertised catalog automatically. + * + * @param format the lakehouse format that advertised the catalog + * @param catalogName the catalog name advertised by the format's REST server + * @return true to register the catalog, false to skip it + */ + boolean shouldRegister(String format, String catalogName); Review Comment: So the default value is `true` or `false`? I mean: for each catalog, will we register it or not by default? ########## spark-connector/spark-common/src/main/java/org/apache/gravitino/spark/connector/plugin/restcatalog/BuiltinRESTCatalogProviders.java: ########## @@ -0,0 +1,38 @@ +/* + * 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.gravitino.spark.connector.plugin.restcatalog; + +import java.util.Collections; +import java.util.Map; + +final class BuiltinRESTCatalogProviders { + + private static final String LANCE_FORMAT = "lance"; Review Comment: Will `iceberg` also be added in the future? ########## spark-connector/spark-common/src/main/java/org/apache/gravitino/spark/connector/plugin/restcatalog/GravitinoLakehouseRESTDiscoveryDriverPlugin.java: ########## @@ -0,0 +1,420 @@ +/* + * 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.gravitino.spark.connector.plugin.restcatalog; + +import static org.apache.gravitino.spark.connector.ConnectorConstants.COMMA; +import static org.apache.gravitino.spark.connector.utils.ConnectorUtil.removeDuplicateSparkExtensions; + +import com.google.common.annotations.VisibleForTesting; +import com.google.common.base.Preconditions; +import java.lang.reflect.InvocationTargetException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.LinkedHashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.TreeMap; +import java.util.regex.Matcher; +import java.util.regex.Pattern; +import org.apache.commons.lang3.StringUtils; +import org.apache.gravitino.spark.connector.plugin.GravitinoSparkPlugin; +import org.apache.spark.SparkConf; +import org.apache.spark.SparkContext; +import org.apache.spark.api.plugin.DriverPlugin; +import org.apache.spark.api.plugin.PluginContext; +import org.apache.spark.sql.catalyst.parser.CatalystSqlParser$; +import org.apache.spark.sql.internal.StaticSQLConf; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import scala.Tuple2; +import scala.collection.Seq; + +class GravitinoLakehouseRESTDiscoveryDriverPlugin implements DriverPlugin { + + @VisibleForTesting + static final String REGISTRATION_POLICY_CONFIG = "spark.sql.gravitino.REST.registrationPolicy"; + + private static final Logger LOG = + LoggerFactory.getLogger(GravitinoLakehouseRESTDiscoveryDriverPlugin.class); + private static final String GRAVITINO_PREFIX = "spark.sql.gravitino."; + private static final String SPARK_CATALOG_PREFIX = "spark.sql.catalog."; + private static final String URI_SUFFIX = "REST.uri"; + private static final String CATALOG_PROPERTIES_INFIX = "REST.catalogProperties."; + private static final Pattern PROVIDER_URI_PATTERN = + Pattern.compile("^spark\\.sql\\.gravitino\\.([A-Za-z][A-Za-z0-9]*)REST\\.uri$"); + private static final CatalogRegistrationPolicy DEFAULT_POLICY = (format, catalogName) -> true; + + GravitinoLakehouseRESTDiscoveryDriverPlugin() {} + + @Override + public Map<String, String> init(SparkContext sc, PluginContext pluginContext) { + initialize(sc.conf()); + return Collections.emptyMap(); + } + + @VisibleForTesting + void initialize(SparkConf sparkConf) { + initialize(sparkConf, BuiltinRESTCatalogProviders.providerClassNames()); + } + + @VisibleForTesting + void initialize(SparkConf sparkConf, Map<String, String> providerClassNames) { + validatePluginOrder(sparkConf); + SparkConf userConf = sparkConf.clone(); + Map<String, String> activeFormats = findActiveFormats(userConf); + if (activeFormats.isEmpty()) { + return; + } + + ClassLoader classLoader = contextClassLoader(); + CatalogRegistrationPolicy policy = loadRegistrationPolicy(userConf, classLoader); + List<CatalogRegistration> registrations = new ArrayList<>(); + Set<String> registeredNames = new LinkedHashSet<>(); + Set<String> extensions = new LinkedHashSet<>(); + + activeFormats.forEach( + (format, uri) -> { + LakehouseRESTCatalogProvider provider = + loadProvider(format, providerClassNames, classLoader); + validateProviderRuntime(provider, classLoader); + + Map<String, String> globalProperties = extractCatalogProperties(userConf, format); + List<String> advertisedCatalogs = + provider.listCatalogs(uri, Collections.unmodifiableMap(globalProperties)); + Preconditions.checkState( + advertisedCatalogs != null, + "Lakehouse REST catalog provider %s returned a null catalog list", + format); + + List<String> sortedCatalogs = new ArrayList<>(advertisedCatalogs); + Collections.sort(sortedCatalogs); + for (String catalogName : sortedCatalogs) { + addRegistration( + userConf, + provider, + policy, + format, + uri, + catalogName, + globalProperties, + registeredNames, + registrations); + } + extensions.addAll(Arrays.asList(provider.sparkExtensions())); + }); + + applyRegistrations(sparkConf, userConf, registrations); + registerSqlExtensions(sparkConf, extensions); + } + + private static void validatePluginOrder(SparkConf sparkConf) { + String configuredPlugins = sparkConf.get("spark.plugins", ""); + List<String> plugins = new ArrayList<>(); + for (String plugin : configuredPlugins.split(COMMA)) { + if (StringUtils.isNotBlank(plugin)) { + plugins.add(plugin.trim()); + } + } + + int discoveryPluginIndex = + plugins.indexOf(GravitinoLakehouseRESTDiscoveryPlugin.class.getName()); + int gravitinoPluginIndex = plugins.indexOf(GravitinoSparkPlugin.class.getName()); + Preconditions.checkArgument( + discoveryPluginIndex < 0 + || gravitinoPluginIndex < 0 + || discoveryPluginIndex < gravitinoPluginIndex, + "%s must be listed before %s in spark.plugins", + GravitinoLakehouseRESTDiscoveryPlugin.class.getName(), + GravitinoSparkPlugin.class.getName()); + } + + private static Map<String, String> findActiveFormats(SparkConf userConf) { + Map<String, String> activeFormats = new TreeMap<>(); + for (Tuple2<String, String> entry : userConf.getAll()) { + Matcher matcher = PROVIDER_URI_PATTERN.matcher(entry._1); + if (matcher.matches()) { + String format = matcher.group(1); + String uri = entry._2; + Preconditions.checkArgument( + StringUtils.isNotBlank(uri), + "%s%s%s must not be blank", + GRAVITINO_PREFIX, + format, + URI_SUFFIX); + activeFormats.put(format, uri); + } + } + return activeFormats; + } + + private static CatalogRegistrationPolicy loadRegistrationPolicy( + SparkConf userConf, ClassLoader classLoader) { + if (!userConf.contains(REGISTRATION_POLICY_CONFIG)) { + return DEFAULT_POLICY; + } + + String policyClassName = userConf.get(REGISTRATION_POLICY_CONFIG); + Preconditions.checkArgument( + StringUtils.isNotBlank(policyClassName), + "%s must not be blank", + REGISTRATION_POLICY_CONFIG); + try { + Class<?> policyClass = Class.forName(policyClassName, true, classLoader); + Preconditions.checkArgument( + CatalogRegistrationPolicy.class.isAssignableFrom(policyClass), + "%s does not implement %s", + policyClassName, + CatalogRegistrationPolicy.class.getName()); + return CatalogRegistrationPolicy.class.cast(policyClass.getConstructor().newInstance()); Review Comment: `policyClass.getConstructor().newInstance()` depends on a constructor with empty parameter; you'd better add some restriction or description on the `Policy`. ########## spark-connector/spark-common/src/main/java/org/apache/gravitino/spark/connector/plugin/restcatalog/GravitinoLakehouseRESTDiscoveryDriverPlugin.java: ########## @@ -0,0 +1,420 @@ +/* + * 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.gravitino.spark.connector.plugin.restcatalog; + +import static org.apache.gravitino.spark.connector.ConnectorConstants.COMMA; +import static org.apache.gravitino.spark.connector.utils.ConnectorUtil.removeDuplicateSparkExtensions; + +import com.google.common.annotations.VisibleForTesting; +import com.google.common.base.Preconditions; +import java.lang.reflect.InvocationTargetException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.LinkedHashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.TreeMap; +import java.util.regex.Matcher; +import java.util.regex.Pattern; +import org.apache.commons.lang3.StringUtils; +import org.apache.gravitino.spark.connector.plugin.GravitinoSparkPlugin; +import org.apache.spark.SparkConf; +import org.apache.spark.SparkContext; +import org.apache.spark.api.plugin.DriverPlugin; +import org.apache.spark.api.plugin.PluginContext; +import org.apache.spark.sql.catalyst.parser.CatalystSqlParser$; +import org.apache.spark.sql.internal.StaticSQLConf; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import scala.Tuple2; +import scala.collection.Seq; + +class GravitinoLakehouseRESTDiscoveryDriverPlugin implements DriverPlugin { + + @VisibleForTesting + static final String REGISTRATION_POLICY_CONFIG = "spark.sql.gravitino.REST.registrationPolicy"; + + private static final Logger LOG = + LoggerFactory.getLogger(GravitinoLakehouseRESTDiscoveryDriverPlugin.class); + private static final String GRAVITINO_PREFIX = "spark.sql.gravitino."; + private static final String SPARK_CATALOG_PREFIX = "spark.sql.catalog."; + private static final String URI_SUFFIX = "REST.uri"; + private static final String CATALOG_PROPERTIES_INFIX = "REST.catalogProperties."; + private static final Pattern PROVIDER_URI_PATTERN = + Pattern.compile("^spark\\.sql\\.gravitino\\.([A-Za-z][A-Za-z0-9]*)REST\\.uri$"); + private static final CatalogRegistrationPolicy DEFAULT_POLICY = (format, catalogName) -> true; + + GravitinoLakehouseRESTDiscoveryDriverPlugin() {} + + @Override + public Map<String, String> init(SparkContext sc, PluginContext pluginContext) { + initialize(sc.conf()); + return Collections.emptyMap(); + } + + @VisibleForTesting + void initialize(SparkConf sparkConf) { + initialize(sparkConf, BuiltinRESTCatalogProviders.providerClassNames()); + } + + @VisibleForTesting + void initialize(SparkConf sparkConf, Map<String, String> providerClassNames) { + validatePluginOrder(sparkConf); + SparkConf userConf = sparkConf.clone(); + Map<String, String> activeFormats = findActiveFormats(userConf); + if (activeFormats.isEmpty()) { + return; + } + + ClassLoader classLoader = contextClassLoader(); + CatalogRegistrationPolicy policy = loadRegistrationPolicy(userConf, classLoader); + List<CatalogRegistration> registrations = new ArrayList<>(); + Set<String> registeredNames = new LinkedHashSet<>(); + Set<String> extensions = new LinkedHashSet<>(); + + activeFormats.forEach( + (format, uri) -> { + LakehouseRESTCatalogProvider provider = + loadProvider(format, providerClassNames, classLoader); + validateProviderRuntime(provider, classLoader); + + Map<String, String> globalProperties = extractCatalogProperties(userConf, format); + List<String> advertisedCatalogs = + provider.listCatalogs(uri, Collections.unmodifiableMap(globalProperties)); + Preconditions.checkState( + advertisedCatalogs != null, + "Lakehouse REST catalog provider %s returned a null catalog list", + format); + + List<String> sortedCatalogs = new ArrayList<>(advertisedCatalogs); + Collections.sort(sortedCatalogs); + for (String catalogName : sortedCatalogs) { + addRegistration( + userConf, + provider, + policy, + format, + uri, + catalogName, + globalProperties, + registeredNames, + registrations); + } + extensions.addAll(Arrays.asList(provider.sparkExtensions())); + }); + + applyRegistrations(sparkConf, userConf, registrations); + registerSqlExtensions(sparkConf, extensions); + } + + private static void validatePluginOrder(SparkConf sparkConf) { + String configuredPlugins = sparkConf.get("spark.plugins", ""); + List<String> plugins = new ArrayList<>(); + for (String plugin : configuredPlugins.split(COMMA)) { + if (StringUtils.isNotBlank(plugin)) { + plugins.add(plugin.trim()); + } + } + + int discoveryPluginIndex = + plugins.indexOf(GravitinoLakehouseRESTDiscoveryPlugin.class.getName()); + int gravitinoPluginIndex = plugins.indexOf(GravitinoSparkPlugin.class.getName()); + Preconditions.checkArgument( + discoveryPluginIndex < 0 + || gravitinoPluginIndex < 0 + || discoveryPluginIndex < gravitinoPluginIndex, + "%s must be listed before %s in spark.plugins", + GravitinoLakehouseRESTDiscoveryPlugin.class.getName(), + GravitinoSparkPlugin.class.getName()); + } + + private static Map<String, String> findActiveFormats(SparkConf userConf) { + Map<String, String> activeFormats = new TreeMap<>(); + for (Tuple2<String, String> entry : userConf.getAll()) { + Matcher matcher = PROVIDER_URI_PATTERN.matcher(entry._1); + if (matcher.matches()) { + String format = matcher.group(1); + String uri = entry._2; + Preconditions.checkArgument( + StringUtils.isNotBlank(uri), + "%s%s%s must not be blank", + GRAVITINO_PREFIX, + format, + URI_SUFFIX); + activeFormats.put(format, uri); + } + } + return activeFormats; + } + + private static CatalogRegistrationPolicy loadRegistrationPolicy( + SparkConf userConf, ClassLoader classLoader) { + if (!userConf.contains(REGISTRATION_POLICY_CONFIG)) { + return DEFAULT_POLICY; + } + + String policyClassName = userConf.get(REGISTRATION_POLICY_CONFIG); + Preconditions.checkArgument( + StringUtils.isNotBlank(policyClassName), + "%s must not be blank", + REGISTRATION_POLICY_CONFIG); + try { + Class<?> policyClass = Class.forName(policyClassName, true, classLoader); + Preconditions.checkArgument( + CatalogRegistrationPolicy.class.isAssignableFrom(policyClass), + "%s does not implement %s", + policyClassName, + CatalogRegistrationPolicy.class.getName()); + return CatalogRegistrationPolicy.class.cast(policyClass.getConstructor().newInstance()); + } catch (ClassNotFoundException + | NoSuchMethodException + | InstantiationException + | IllegalAccessException + | InvocationTargetException e) { + throw new IllegalArgumentException( + "Failed to instantiate catalog registration policy " + policyClassName, e); + } + } + + private static LakehouseRESTCatalogProvider loadProvider( + String format, Map<String, String> providerClassNames, ClassLoader classLoader) { + String providerClassName = providerClassNames.get(format); + Preconditions.checkArgument( + providerClassName != null, + "No lakehouse REST catalog provider found for configured format: %s", + format); + try { + Class<?> providerClass = Class.forName(providerClassName, true, classLoader); + Preconditions.checkArgument( + LakehouseRESTCatalogProvider.class.isAssignableFrom(providerClass), + "%s does not implement %s", + providerClassName, + LakehouseRESTCatalogProvider.class.getName()); + return providerClass + .asSubclass(LakehouseRESTCatalogProvider.class) + .getConstructor() + .newInstance(); + } catch (ReflectiveOperationException | LinkageError e) { + throw new IllegalArgumentException( + String.format( + "Failed to instantiate lakehouse REST catalog provider %s for format %s", + providerClassName, format), + e); + } + } + + private static void validateProviderRuntime( + LakehouseRESTCatalogProvider provider, ClassLoader classLoader) { + validateRuntimeClass(provider.format(), provider.catalogClassName(), classLoader); + String[] providerExtensions = provider.sparkExtensions(); + Preconditions.checkState( + providerExtensions != null, + "Lakehouse REST catalog provider %s returned null Spark extensions", + provider.format()); + for (String extension : providerExtensions) { + validateRuntimeClass(provider.format(), extension, classLoader); + } + } + + private static void validateRuntimeClass( Review Comment: loadRuntimeClass -- This is an automated message from the Apache Git Service. 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