Reamer commented on code in PR #5032:
URL: https://github.com/apache/zeppelin/pull/5032#discussion_r2293504620


##########
flink/flink1.20-shims/src/main/java/org/apache/zeppelin/flink/Flink120Shims.java:
##########
@@ -0,0 +1,423 @@
+/*
+ * 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.zeppelin.flink;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.net.InetAddress;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.time.ZoneId;
+import java.util.List;
+import java.util.Properties;
+import java.util.StringJoiner;
+import java.util.stream.Stream;
+
+import org.apache.commons.cli.CommandLine;
+import org.apache.commons.compress.utils.Lists;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.tuple.ImmutablePair;
+import org.apache.flink.api.common.RuntimeExecutionMode;
+import org.apache.flink.api.common.typeutils.TypeSerializer;
+import org.apache.flink.api.java.tuple.Tuple2;
+import org.apache.flink.client.cli.CliFrontend;
+import org.apache.flink.client.cli.CustomCommandLine;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.configuration.ExecutionOptions;
+import org.apache.flink.configuration.ReadableConfig;
+import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
+import 
org.apache.flink.streaming.api.environment.StreamExecutionEnvironmentFactory;
+import org.apache.flink.table.api.*;
+import 
org.apache.flink.table.api.bridge.java.internal.StreamTableEnvironmentImpl;
+import org.apache.flink.table.api.config.TableConfigOptions;
+import org.apache.flink.table.catalog.*;
+import org.apache.flink.table.client.resource.ClientResourceManager;
+import org.apache.flink.table.client.util.ClientClassloaderUtil;
+import org.apache.flink.table.client.util.ClientWrapperClassLoader;
+import org.apache.flink.table.delegation.Executor;
+import org.apache.flink.table.delegation.ExecutorFactory;
+import org.apache.flink.table.delegation.Planner;
+import org.apache.flink.table.factories.CatalogStoreFactory;
+import org.apache.flink.table.factories.FactoryUtil;
+import org.apache.flink.table.factories.PlannerFactoryUtil;
+import org.apache.flink.table.factories.TableFactoryUtil;
+import org.apache.flink.table.functions.AggregateFunction;
+import org.apache.flink.table.functions.ScalarFunction;
+import org.apache.flink.table.functions.TableAggregateFunction;
+import org.apache.flink.table.functions.TableFunction;
+import org.apache.flink.table.module.ModuleManager;
+import org.apache.flink.table.resource.ResourceManager;
+import org.apache.flink.table.sinks.TableSink;
+import org.apache.flink.table.typeutils.TimeIndicatorTypeInfo;
+import org.apache.flink.types.Row;
+import org.apache.flink.types.RowKind;
+import org.apache.flink.util.FlinkException;
+import org.apache.zeppelin.flink.shims120.CollectStreamTableSink;
+import org.apache.zeppelin.interpreter.InterpreterContext;
+import org.apache.zeppelin.interpreter.InterpreterResult;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Shims for flink 1.20
+ */
+public class Flink120Shims extends FlinkShims {
+
+  private static final Logger LOGGER = 
LoggerFactory.getLogger(Flink120Shims.class);
+
+  private Flink120SqlInterpreter batchSqlInterpreter;
+  private Flink120SqlInterpreter streamSqlInterpreter;
+
+  public Flink120Shims(FlinkVersion flinkVersion, Properties properties) {
+    super(flinkVersion, properties);
+  }
+
+  public void initInnerBatchSqlInterpreter(FlinkSqlContext flinkSqlContext) {
+    this.batchSqlInterpreter = new Flink120SqlInterpreter(flinkSqlContext, 
true);
+  }
+
+  public void initInnerStreamSqlInterpreter(FlinkSqlContext flinkSqlContext) {
+    this.streamSqlInterpreter = new Flink120SqlInterpreter(flinkSqlContext, 
false);
+  }
+
+  @Override
+  public Object createResourceManager(List<URL> jars, Object tableConfig) {
+    Configuration configuration = ((TableConfig) 
tableConfig).getConfiguration().clone();
+    ClientWrapperClassLoader userClassLoader =
+            new ClientWrapperClassLoader(
+                    ClientClassloaderUtil.buildUserClassLoader(
+                            jars,
+                            Thread.currentThread().getContextClassLoader(),
+                            new Configuration(configuration)),
+                    configuration);
+    return new ClientResourceManager(configuration, userClassLoader);
+  }
+
+  @Override
+  public Object createFunctionCatalog(Object tableConfig, Object 
catalogManager, Object moduleManager, List<URL> jars) {
+    ResourceManager resourceManager = (ResourceManager) 
createResourceManager(jars, tableConfig);
+    return new FunctionCatalog((TableConfig) tableConfig, resourceManager, 
(CatalogManager) catalogManager, (ModuleManager) moduleManager);
+  }
+
+  @Override
+  public void disableSysoutLogging(Object batchConfig, Object streamConfig) {
+    // do nothing
+  }
+
+  @Override
+  public Object createScalaBlinkStreamTableEnvironment(Object 
environmentSettingsObj,
+                                                       Object senvObj,
+                                                       Object tableConfigObj,
+                                                       Object moduleManagerObj,
+                                                       Object 
functionCatalogObj,
+                                                       Object 
catalogManagerObj,
+                                                       List<URL> jars,
+                                                       ClassLoader 
classLoader) {
+    EnvironmentSettings environmentSettings = (EnvironmentSettings) 
environmentSettingsObj;
+    StreamExecutionEnvironment senv = (StreamExecutionEnvironment) senvObj;
+    TableConfig tableConfig = (TableConfig) tableConfigObj;
+    ModuleManager moduleManager = (ModuleManager) moduleManagerObj;
+    FunctionCatalog functionCatalog = (FunctionCatalog) functionCatalogObj;
+    CatalogManager catalogManager = (CatalogManager) catalogManagerObj;
+    ImmutablePair<Object, Object> pair = createPlannerAndExecutor(
+            classLoader, environmentSettings, senv,
+            tableConfig, moduleManager, functionCatalog, catalogManager);
+    Planner planner = (Planner) pair.left;
+    Executor executor = (Executor) pair.right;
+
+    ResourceManager resourceManager = (ResourceManager) 
createResourceManager(jars, tableConfig);
+
+    return new 
org.apache.flink.table.api.bridge.scala.internal.StreamTableEnvironmentImpl(catalogManager,
+            moduleManager, resourceManager,
+            functionCatalog, tableConfig, new 
org.apache.flink.streaming.api.scala.StreamExecutionEnvironment(senv),
+            planner, executor, environmentSettings.isStreamingMode());
+  }
+
+  @Override
+  public Object createJavaBlinkStreamTableEnvironment(Object 
environmentSettingsObj,
+                                                      Object senvObj,
+                                                      Object tableConfigObj,
+                                                      Object moduleManagerObj,
+                                                      Object 
functionCatalogObj,
+                                                      Object catalogManagerObj,
+                                                      List<URL> jars,
+                                                      ClassLoader classLoader) 
{
+    EnvironmentSettings environmentSettings = (EnvironmentSettings) 
environmentSettingsObj;
+    StreamExecutionEnvironment senv = (StreamExecutionEnvironment) senvObj;
+    TableConfig tableConfig = (TableConfig) tableConfigObj;
+    ModuleManager moduleManager = (ModuleManager) moduleManagerObj;
+    FunctionCatalog functionCatalog = (FunctionCatalog) functionCatalogObj;
+    CatalogManager catalogManager = (CatalogManager) catalogManagerObj;
+    ImmutablePair<Object, Object> pair = createPlannerAndExecutor(
+            classLoader, environmentSettings, senv,
+            tableConfig, moduleManager, functionCatalog, catalogManager);
+    Planner planner = (Planner) pair.left;
+    Executor executor = (Executor) pair.right;
+
+    ResourceManager resourceManager = (ResourceManager) 
createResourceManager(jars, tableConfig);
+
+    return new StreamTableEnvironmentImpl(catalogManager, moduleManager, 
resourceManager,
+            functionCatalog, tableConfig, senv, planner, executor, 
environmentSettings.isStreamingMode());
+  }
+
+  @Override
+  public Object createStreamExecutionEnvironmentFactory(Object 
streamExecutionEnvironment) {
+    return new StreamExecutionEnvironmentFactory() {
+      @Override
+      public StreamExecutionEnvironment 
createExecutionEnvironment(Configuration configuration) {
+        return (StreamExecutionEnvironment) streamExecutionEnvironment;
+      }
+    };
+  }
+
+  @Override
+  public Object createCatalogManager(Object config) {
+    final TableConfig tableConfig = TableConfig.getDefault();
+    ClassLoader userClassLoader=Thread.currentThread().getContextClassLoader();
+
+    final CatalogStoreFactory catalogStoreFactory =
+            TableFactoryUtil.findAndCreateCatalogStoreFactory(
+                    tableConfig.getConfiguration(), userClassLoader);
+    final CatalogStore catalogStore =
+                    catalogStoreFactory.createCatalogStore();
+
+    return CatalogManager.newBuilder()
+                    
.classLoader(Thread.currentThread().getContextClassLoader())
+                    .config((ReadableConfig) config)
+                    .defaultCatalog(
+                            "default_catalog",
+                            new GenericInMemoryCatalog(
+                                    "default_catalog",
+                                    "default_database"))
+                    . catalogStoreHolder(
+            CatalogStoreHolder.newBuilder()
+                    
.classloader(Thread.currentThread().getContextClassLoader())
+                    .config(tableConfig)
+                    .catalogStore(catalogStore)
+                    .factory(catalogStoreFactory)
+                    .build())
+            .build();
+  }
+
+  @Override
+  public String getPyFlinkPythonPath(Properties properties) throws IOException 
{
+    String mode = properties.getProperty("flink.execution.mode");
+
+    final Path pyDir;
+    if ("yarn-application".equalsIgnoreCase(mode)) {
+      // for yarn-application mode, FLINK_HOME is the container working 
directory
+      Path flinkHome = Paths.get(".").toAbsolutePath().normalize();
+      pyDir = flinkHome.resolve("lib").resolve("python");
+    } else {
+      String flinkHome = System.getenv("FLINK_HOME");
+      if (flinkHome != null && !flinkHome.isBlank()) {
+        pyDir = Paths.get(flinkHome).resolve("opt").resolve("python");

Review Comment:
   Why do you use Paths.resolve() in various places?
   I would have shortened it to Paths.get(“flinkHome”, “opt”, "python").



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