xuyang1706 commented on a change in pull request #9184: [FLINK-13339][ml] Add an implementation of pipeline's api URL: https://github.com/apache/flink/pull/9184#discussion_r329345694
########## File path: flink-ml-parent/flink-ml-lib/src/main/java/org/apache/flink/ml/common/MLEnvironment.java ########## @@ -0,0 +1,184 @@ +/* + * 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.flink.ml.common; + +import org.apache.flink.api.java.ExecutionEnvironment; +import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment; +import org.apache.flink.table.api.Table; +import org.apache.flink.table.api.TableEnvironment; +import org.apache.flink.table.api.java.BatchTableEnvironment; +import org.apache.flink.table.api.java.StreamTableEnvironment; +import org.apache.flink.table.api.java.internal.StreamTableEnvironmentImpl; +import org.apache.flink.types.Row; +import org.apache.flink.util.Preconditions; + +/** + * MLEnvironment hold the execution environment. + * + * @see ExecutionEnvironment + * @see StreamExecutionEnvironment + * @see BatchTableEnvironment + * @see StreamTableEnvironment + */ +public class MLEnvironment { + private ExecutionEnvironment env; + private StreamExecutionEnvironment streamEnv; + private BatchTableEnvironment batchTableEnv; + private StreamTableEnvironment streamTableEnv; + + /** + * Get the ExecutionEnvironment. + * if the ExecutionEnvironment has not been set, it initial the ExecutionEnvironment + * with default Configuration. + * + * @return the batch {@link ExecutionEnvironment} + * @see MLEnvironment#setExecutionEnvironment(ExecutionEnvironment) + */ + public ExecutionEnvironment getExecutionEnvironment() { + if (null == env) { + env = ExecutionEnvironment.getExecutionEnvironment(); + } + return env; + } + + /** + * Get the StreamExecutionEnvironment. + * if the StreamExecutionEnvironment has not been set, it initial the StreamExecutionEnvironment + * with default Configuration. + * + * @return the {@link StreamExecutionEnvironment} + * @see MLEnvironment#setStreamExecutionEnvironment(StreamExecutionEnvironment) + */ + public StreamExecutionEnvironment getStreamExecutionEnvironment() { + if (null == streamEnv) { + streamEnv = StreamExecutionEnvironment.getExecutionEnvironment(); + } + return streamEnv; + } + + /** + * Get the BatchTableEnvironment. + * if the BatchTableEnvironment has not been set, it initial the BatchTableEnvironment + * with default Configuration. + * + * @return the {@link BatchTableEnvironment} + * @see MLEnvironment#setTableEnvironment(TableEnvironment, Table) + */ + public BatchTableEnvironment getBatchTableEnvironment() { + if (null == batchTableEnv) { + batchTableEnv = BatchTableEnvironment.create(getExecutionEnvironment()); + } + return batchTableEnv; + } + + /** + * Get the StreamTableEnvironment. + * if the StreamTableEnvironment has not been set, it initial the StreamTableEnvironment + * with default Configuration. + * + * @return the {@link StreamTableEnvironment} + * @see MLEnvironment#setTableEnvironment(TableEnvironment, Table) + */ + public StreamTableEnvironment getStreamTableEnvironment() { + if (null == streamTableEnv) { + streamTableEnv = StreamTableEnvironment.create(getStreamExecutionEnvironment()); + } + return streamTableEnv; + } + + /** + * Set the ExecutionEnvironment. + * The ExecutionEnvironment should be set only once. + * + * @param env the ExecutionEnvironment + */ + public void setExecutionEnvironment(ExecutionEnvironment env) { + assert env != null; + + if (this.env != null && this.env != env) { + throw new RuntimeException("There should be only one batch execution environment"); + } + + this.env = env; + } + + /** + * Set the StreamExecutionEnvironment. + * The StreamExecutionEnvironment should be set only once. + * + * @param env the StreamExecutionEnvironment + */ + public void setStreamExecutionEnvironment(StreamExecutionEnvironment env) { + assert env != null; + + if (this.streamEnv != null && this.streamEnv != env) { + throw new RuntimeException("There should be only one stream execution environment"); + } + + this.streamEnv = env; + } + + /** + * Set the TableEnvironment. + * The TableEnvironment should be set only once. + * + * <p>We also set the {@link ExecutionEnvironment} or {@link StreamExecutionEnvironment} accordingly. + * + * @param tEnv the TableEnvironment + * @param table the table for get {@link ExecutionEnvironment} for batch + */ + public void setTableEnvironment(TableEnvironment tEnv, Table table) { Review comment: Thanks, removed ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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