[jira] [Commented] (FLINK-8620) Enable shipping custom artifacts to BlobStore and accessing them through DistributedCache

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-8620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16425166#comment-16425166 ] 

ASF GitHub Bot commented on FLINK-8620:
---------------------------------------

Github user zentol commented on a diff in the pull request:

    https://github.com/apache/flink/pull/5580#discussion_r179053531
  
    --- Diff: flink-end-to-end-tests/flink-distributed-cache-via-blob-test/src/main/java/org/apache/flink/streaming/tests/DistributedCacheViaBlobTestProgram.java ---
    @@ -0,0 +1,76 @@
    +/*
    + * 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
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    + * 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.streaming.tests;
    +
    +import org.apache.flink.api.common.functions.RichMapFunction;
    +import org.apache.flink.api.java.utils.ParameterTool;
    +import org.apache.flink.core.fs.FileSystem;
    +import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
    +
    +import org.apache.commons.lang3.StringUtils;
    +
    +import java.io.File;
    +import java.nio.file.Files;
    +import java.nio.file.Paths;
    +
    +import static java.util.Collections.singletonList;
    +
    +/**
    + * End-to-end test program for verifying that files are distributed via BlobServer and later accessible through
    + * DistribitutedCache. We verify that via uploading file and later on accessing it in map function. To be sure we read
    + * version read from cache, we delete the initial file.
    + */
    +public class DistributedCacheViaBlobTestProgram {
    +
    +	public static void main(String[] args) throws Exception {
    +
    +		final ParameterTool params = ParameterTool.fromArgs(args);
    +
    +		final String fileContent = params.getRequired("content");
    +		final String tempDir = params.getRequired("tempDir");
    +
    +		final File tempFile = File.createTempFile("temp", null, new File(tempDir));
    +		Files.write(tempFile.toPath(), singletonList(fileContent));
    +
    +		final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    --- End diff --
    
    explicitly set the parallelism to `1`?


> Enable shipping custom artifacts to BlobStore and accessing them through DistributedCache
> -----------------------------------------------------------------------------------------
>
>                 Key: FLINK-8620
>                 URL: https://issues.apache.org/jira/browse/FLINK-8620
>             Project: Flink
>          Issue Type: New Feature
>            Reporter: Dawid Wysakowicz
>            Assignee: Dawid Wysakowicz
>            Priority: Major
>
> We should be able to distribute custom files to taskmanagers. To do that we can store those files in BlobStore and later on access them in TaskManagers through DistributedCache.



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