becketqin 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_r328963109
########## 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) { Review comment: ditto above. ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services
