dengzhhu653 commented on code in PR #5145: URL: https://github.com/apache/hive/pull/5145#discussion_r1846055012
########## standalone-metastore/metastore-catalog/src/main/java/org/apache/iceberg/rest/HMSCatalogServer.java: ########## @@ -0,0 +1,139 @@ +/* + * 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.iceberg.rest; + +import java.io.IOException; +import java.lang.ref.Reference; +import java.lang.ref.SoftReference; +import java.util.Collections; +import java.util.Map; +import java.util.TreeMap; +import javax.servlet.http.HttpServlet; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.hive.metastore.SecureServletCaller; +import org.apache.hadoop.hive.metastore.ServletSecurity; +import org.apache.hadoop.hive.metastore.conf.MetastoreConf; +import org.apache.iceberg.HiveCachingCatalog; +import org.apache.iceberg.catalog.Catalog; +import org.apache.iceberg.hive.HiveCatalog; +import org.eclipse.jetty.server.Server; +import org.eclipse.jetty.server.handler.gzip.GzipHandler; +import org.eclipse.jetty.servlet.ServletContextHandler; +import org.eclipse.jetty.servlet.ServletHolder; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +public class HMSCatalogServer { + private static final String CACHE_EXPIRY = "hive.metastore.catalog.cache.expiry"; + /** + * The metric names prefix. + */ + static final String HMS_METRIC_PREFIX = "hmscatalog."; + private static final Logger LOG = LoggerFactory.getLogger(HMSCatalogServer.class); + private static Reference<Catalog> catalogRef; + + static Catalog getLastCatalog() { + return catalogRef != null ? catalogRef.get() : null; + } + + private HMSCatalogServer() { + // nothing + } + + public static HttpServlet createServlet(SecureServletCaller security, Catalog catalog) throws IOException { + try (HMSCatalogAdapter adapter = new HMSCatalogAdapter(catalog)) { + return new HMSCatalogServlet(security, adapter); + } + } + + public static Catalog createCatalog(Configuration configuration) { + final String curi = configuration.get(MetastoreConf.ConfVars.THRIFT_URIS.getVarname()); + final String cwarehouse = configuration.get(MetastoreConf.ConfVars.WAREHOUSE.getVarname()); + final String cextwarehouse = configuration.get(MetastoreConf.ConfVars.WAREHOUSE_EXTERNAL.getVarname()); + final HiveCatalog catalog = new org.apache.iceberg.hive.HiveCatalog(); + catalog.setConf(configuration); + Map<String, String> properties = new TreeMap<>(); + if (curi != null) { + properties.put("uri", curi); + } + if (cwarehouse != null) { + properties.put("warehouse", cwarehouse); + } + if (cextwarehouse != null) { + properties.put("external-warehouse", cextwarehouse); + } + catalog.initialize("hive", properties); + long expiry = configuration.getLong(CACHE_EXPIRY, 60_000L); + return expiry > 0? HiveCachingCatalog.wrap(catalog, expiry) : catalog; + } + + public static HttpServlet createServlet(Configuration configuration, Catalog catalog) throws IOException { + String auth = MetastoreConf.getVar(configuration, MetastoreConf.ConfVars.CATALOG_SERVLET_AUTH); + boolean jwt = "jwt".equalsIgnoreCase(auth); + SecureServletCaller security = new ServletSecurity(configuration, jwt); + Catalog actualCatalog = catalog; + if (actualCatalog == null) { + actualCatalog = createCatalog(configuration); + actualCatalog.initialize("hive", Collections.emptyMap()); + } + catalogRef = new SoftReference<>(actualCatalog); + return createServlet(security, actualCatalog); Review Comment: should we put the `catalogRef` to `createServlet` instead of `actualCatalog`, so no strong reference to the `actualCatalog`? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: gitbox-unsubscr...@hive.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: gitbox-unsubscr...@hive.apache.org For additional commands, e-mail: gitbox-h...@hive.apache.org
