Github user mxm commented on a diff in the pull request:
https://github.com/apache/flink/pull/992#discussion_r37856724
--- Diff:
flink-staging/flink-streaming/flink-streaming-core/src/test/java/org/apache/flink/streaming/api/functions/source/SocketTextStreamFunctionTest.java
---
@@ -0,0 +1,179 @@
+/*
+ * 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{
+ error.set(null);
+ 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();
+ assertEquals(0, source.socketSource.retries);
+ }
+ 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{
+ error.set(null);
+ 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(1000);
--- End diff --
I think you can decrease the waiting time even further to 100 ms.
Otherwise, the test case will take 10 seconds which is quite long for one test
case.
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