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From: HuangWHWHW <git@git.apache.org>
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References: <git-pr-992-flink@git.apache.org>
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Subject: [GitHub] flink pull request: [FLINK-2490][FIX]Remove the retryForever
 check...
Content-Type: text/plain
Message-Id: <20150825082805.041A5E00C5@git1-us-west.apache.org>
Date: Tue, 25 Aug 2015 08:28:05 +0000 (UTC)

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

    https://github.com/apache/flink/pull/992#discussion_r37843364
  
    --- Diff: flink-staging/flink-streaming/flink-streaming-core/src/test/java/org/apache/flink/streaming/api/functions/source/SocketTextStreamFunctionTest.java ---
    @@ -0,0 +1,176 @@
    +/*
    + * 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 java.net.Socket;
    +
    +import org.apache.flink.configuration.Configuration;
    +import org.apache.flink.streaming.api.watermark.Watermark;
    +import org.junit.Test;
    +
    +import static java.lang.Thread.sleep;
    +import static org.junit.Assert.*;
    +
    +import java.net.ServerSocket;
    +import java.util.concurrent.atomic.AtomicReference;
    +
    +/**
    + * Tests for the {@link org.apache.flink.streaming.api.functions.source.SocketTextStreamFunction}.
    + */
    +public class SocketTextStreamFunctionTest{
    +
    +	final AtomicReference<Throwable> error = new AtomicReference<Throwable>();
    +	private final String host = "127.0.0.1";
    +
    +	SourceFunction.SourceContext<String> ctx = new SourceFunction.SourceContext<String>() {
    +		public String result;
    +
    +		@Override
    +		public void collect(String element) {
    +			result = element;
    +		}
    +
    +		@Override
    +		public String toString() {
    +			return this.result;
    +		}
    +
    +		@Override
    +		public void collectWithTimestamp(String element, long timestamp) {
    +
    +		}
    +
    +		@Override
    +		public void emitWatermark(Watermark mark) {
    +
    +		}
    +
    +		@Override
    +		public Object getCheckpointLock() {
    +			return null;
    +		}
    +
    +		@Override
    +		public void close() {
    +
    +		}
    +	};
    +
    +	public SocketTextStreamFunctionTest() {
    +	}
    +
    +	class SocketSource extends Thread {
    +
    +		SocketTextStreamFunction socketSource;
    +
    +		public SocketSource(ServerSocket serverSo, int maxRetry) {
    +			this.socketSource =  new SocketTextStreamFunction(host, serverSo.getLocalPort(), '\n', maxRetry);
    +		}
    +
    +		public void run() {
    +			try {
    +				this.socketSource.open(new Configuration());
    +				this.socketSource.run(ctx);
    +			}catch(Exception e){
    +				error.set(e);
    +			}
    +		}
    +
    +		public void cancel(){
    +			this.socketSource.cancel();
    +		}
    +	}
    +
    +	@Test
    +	public void testSocketSourceRetryForever() throws Exception{
    +		ServerSocket serverSo = new ServerSocket(0);
    +		SocketSource source = new SocketSource(serverSo, -1);
    +		source.start();
    +
    +		int count = 0;
    +		Socket channel;
    +		while (count < 100) {
    +			channel = serverSo.accept();
    +			count++;
    +			channel.close();
    +		}
    +		sleep(10000);
    +		source.cancel();
    +
    +		if (error.get() != null) {
    +			Throwable t = error.get();
    +			t.printStackTrace();
    +			fail("Error in spawned thread: " + t.getMessage());
    +		}
    +
    +		assertEquals(100, count);
    +	}
    +
    +	@Test
    +	 public void testSocketSourceRetryTenTimes() throws Exception{
    +		ServerSocket serverSo = new ServerSocket(0);
    +		SocketSource source = new SocketSource(serverSo, 10);
    +
    +		assertEquals(0, source.socketSource.retries);
    +
    +		source.start();
    +
    +		Socket channel;
    +		channel = serverSo.accept();
    +		channel.close();
    +		serverSo.close();
    +		while(source.socketSource.retries < 10){
    +			long lastRetry = source.socketSource.retries;
    +			sleep(10000);
    +			assertTrue(source.socketSource.retries > lastRetry);
    --- End diff --
    
    Changing to assertEquals(lastRetry+1, source.socketSource.retries) may be some difficult.
    It`s hard to control the real value of source.socketSource.retries.


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