flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From zentol <...@git.apache.org>
Subject [GitHub] flink pull request: Refactoring the File Monitoring Source.
Date Tue, 26 Apr 2016 10:51:57 GMT
Github user zentol commented on a diff in the pull request:

    https://github.com/apache/flink/pull/1929#discussion_r61065673
  
    --- Diff: flink-streaming-java/src/test/java/org/apache/flink/streaming/api/functions/source/FileSplitMonitoringFunctionITCase.java
---
    @@ -0,0 +1,279 @@
    +/*
    + * 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.streaming.api.functions.source;
    +
    +import org.apache.flink.api.common.io.FileInputFormat;
    +import org.apache.flink.api.common.typeinfo.TypeInformation;
    +import org.apache.flink.api.java.typeutils.TypeExtractor;
    +import org.apache.flink.configuration.Configuration;
    +import org.apache.flink.core.fs.FileInputSplit;
    +import org.apache.flink.streaming.api.datastream.DataStream;
    +import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
    +import org.apache.flink.streaming.api.functions.sink.RichSinkFunction;
    +import org.apache.flink.streaming.util.StreamingProgramTestBase;
    +import org.apache.hadoop.fs.FSDataOutputStream;
    +import org.apache.hadoop.fs.FileUtil;
    +import org.apache.hadoop.fs.Path;
    +import org.apache.hadoop.hdfs.MiniDFSCluster;
    +import org.junit.After;
    +import org.junit.Assert;
    +import org.junit.Before;
    +
    +import java.io.File;
    +import java.io.IOException;
    +import java.util.HashMap;
    +import java.util.HashSet;
    +import java.util.Map;
    +import java.util.Set;
    +
    +import static org.junit.Assert.assertEquals;
    +import static org.junit.Assert.fail;
    +
    +public class FileSplitMonitoringFunctionITCase extends StreamingProgramTestBase {
    +
    +	private static final int NO_OF_FILES = 10;
    +	private static final int LINES_PER_FILE = 10;
    +
    +	private static final long INTERVAL = 200;
    +
    +	private File baseDir;
    +
    +	private org.apache.hadoop.fs.FileSystem hdfs;
    +	private String hdfsURI;
    +	private MiniDFSCluster hdfsCluster;
    +
    +	private Set<Path> hdPaths = new HashSet<>();
    +	private Set<String> hdPathNames = new HashSet<>();
    +	private Map<Integer, String> hdPathContents = new HashMap<>();
    +
    +	//						PREPARING FOR THE TESTS
    +
    +	@Before
    +	public void createHDFS() {
    +		try {
    +			baseDir = new File("./target/hdfs/hdfsTesting").getAbsoluteFile();
    +			FileUtil.fullyDelete(baseDir);
    +
    +			org.apache.hadoop.conf.Configuration hdConf = new org.apache.hadoop.conf.Configuration();
    +			hdConf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, baseDir.getAbsolutePath());
    +			hdConf.set("dfs.block.size", String.valueOf(1048576)); // this is the minimum we can
set.
    +
    +			MiniDFSCluster.Builder builder = new MiniDFSCluster.Builder(hdConf);
    +			hdfsCluster = builder.build();
    +
    +			hdfsURI = "hdfs://" + hdfsCluster.getURI().getHost() + ":" + hdfsCluster.getNameNodePort()
+"/";
    +			hdfs = new org.apache.hadoop.fs.Path(hdfsURI).getFileSystem(hdConf);
    +
    +		} catch(Throwable e) {
    +			e.printStackTrace();
    +			Assert.fail("Test failed " + e.getMessage());
    +		}
    +	}
    +
    +	@After
    +	public void destroyHDFS() {
    +		FileUtil.fullyDelete(baseDir);
    +		hdfsCluster.shutdown();
    +	}
    +
    +	//						END OF PREPARATIONS
    +
    +	private static final Object lock = new Object();
    +
    +	private boolean[] finished;
    +
    +	@Override
    +	protected void testProgram() throws Exception {
    +		FileCreator fileCreator = new FileCreator(INTERVAL);
    +		Thread t = new Thread(fileCreator);
    +		t.start();
    +		Thread.sleep(100);
    +
    +		StringFileFormat format = new StringFileFormat();
    +		format.setFilePath(hdfsURI);
    +
    +		Configuration config = new Configuration();
    +		config.setString("input.file.path", hdfsURI);
    +
    +		FileSplitMonitoringFunction<String> monitoringFunction = null;
    +		FileSplitReadOperator<String> reader = null;
    +		TestingSinkFunction sink = null;
    +
    +		try {
    +			StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    +			env.setParallelism(1);
    +
    +			monitoringFunction = new FileSplitMonitoringFunction<String>(format, hdfsURI,
    +				config, FileSplitMonitoringFunction.WatchType.REPROCESS_WITH_APPENDED,
    +				env.getParallelism(), INTERVAL);
    +
    +			TypeInformation<String> typeInfo = TypeExtractor.getInputFormatTypes(format);
    +			reader = new FileSplitReadOperator<String>(format, typeInfo, config);
    +			sink = new TestingSinkFunction(monitoringFunction);
    +
    +			DataStream<FileInputSplit> splits = env.addSource(monitoringFunction);
    +			splits.transform("FileSplitReader", typeInfo, reader).addSink(sink).setParallelism(1);
    +			env.execute();
    +
    +		} catch (Exception e) {
    +			if (!(e.getCause() instanceof SuccessException)) {
    +				e.printStackTrace();
    +				fail();
    +			}
    +		}
    +	}
    +
    +	private static int elementCounter = 0;
    +	private static Map<Integer, Integer> elementCounters = new HashMap<>();
    +	private static Map<Integer, String> collectedContent = new HashMap<>();
    +
    +	private static class TestingSinkFunction extends RichSinkFunction<String> {
    +
    +		private final FileSplitMonitoringFunction src;
    +
    +		TestingSinkFunction(FileSplitMonitoringFunction monitoringFunction) {
    +			this.src = monitoringFunction;
    +		}
    +
    +
    +		@Override
    +		public void open(Configuration parameters) throws Exception {
    +			// this sink can only work with DOP 1
    +			assertEquals(1, getRuntimeContext().getNumberOfParallelSubtasks());
    +		}
    +
    +		@Override
    +		public void close() {
    +			src.cancel();
    +			try {
    +				src.close();
    +			} catch (Exception e) {
    +				e.printStackTrace();
    +			}
    +		}
    +
    +		@Override
    +		public void invoke(String value) throws Exception {
    +			synchronized (lock) {
    +				int fileIdx = Character.getNumericValue(value.charAt(0));
    +
    +				Integer counter = elementCounters.get(fileIdx);
    +				if(counter == null) {
    --- End diff --
    
    ideally yes, but we were apprehensive so far since it would affect so many existing files.


---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.
---

Mime
View raw message