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Fix socket bug: read before sock connect. Add UT for FourLetterWordMain. (#1954) 

* Fix socket bug: read before sock connect. Add UT for FourLetterWordMain.

* Fix code smell

   Remove  @Ignore and  @Test from testCmd().

* correct comment
pull/2/head
Jave-Chen 5 years ago committed by GitHub
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3 changed files with 238 additions and 12 deletions
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  1. 21
      dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/utils/FourLetterWordMain.java
  2. 218
      dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/utils/FourLetterWordMainTest.java
  3. 1
      pom.xml

21
dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/utils/FourLetterWordMain.java
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@ -17,7 +17,6 @@
package org.apache.dolphinscheduler.api.utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@ -29,13 +28,17 @@ import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;
import java.util.Objects;
public class FourLetterWordMain {
private static final int DEFAULT_SOCKET_TIMEOUT = 5000;
protected static final Logger LOG = LoggerFactory.getLogger(FourLetterWordMain.class);
private FourLetterWordMain() {
throw new IllegalStateException("FourLetterWordMain class");
}
/**
* Send the 4letterword
* @param host the destination host
@ -48,6 +51,7 @@ public class FourLetterWordMain {
throws IOException {
return send4LetterWord(host, port, cmd, DEFAULT_SOCKET_TIMEOUT);
}
/**
* Send the 4letterword
* @param host the destination host
@ -59,30 +63,33 @@ public class FourLetterWordMain {
*/
public static String send4LetterWord(String host, int port, String cmd, int timeout)
throws IOException {
Objects.requireNonNull(cmd, "cmd must not be null");
LOG.info("connecting to {} {}", host, port);
InetSocketAddress hostaddress= host != null ? new InetSocketAddress(host, port) :
new InetSocketAddress(InetAddress.getByName(null), port);
try (Socket sock = new Socket();
OutputStream outstream = sock.getOutputStream();
BufferedReader reader =
new BufferedReader(
new InputStreamReader(sock.getInputStream()))) {
try (Socket sock = new Socket()) {
sock.setSoTimeout(timeout);
sock.connect(hostaddress, timeout);
OutputStream outstream = sock.getOutputStream();
outstream.write(cmd.getBytes());
outstream.flush();
// this replicates NC - close the output stream before reading
sock.shutdownOutput();
try (BufferedReader reader =
new BufferedReader(
new InputStreamReader(sock.getInputStream()))) {
StringBuilder sb = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
return sb.toString();
}
} catch (SocketTimeoutException e) {
throw new IOException("Exception while executing four letter word: " + cmd, e);
}
}
}

218
dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/utils/FourLetterWordMainTest.java
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@ -0,0 +1,218 @@
/*
* 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.dolphinscheduler.api.utils;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketTimeoutException;
import static org.junit.Assert.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.when;
@RunWith(PowerMockRunner.class)
@PrepareForTest({FourLetterWordMain.class, Socket.class})
public class FourLetterWordMainTest {
private static final Logger logger =
LoggerFactory.getLogger(FourLetterWordMainTest.class);
private static final String NEW_LINE = "\n";
@InjectMocks
private FourLetterWordMain fourLetterWord;
@Mock
private Socket socket;
@Mock
private InetSocketAddress socketAddress;
private final String localHost = "127.0.0.1";
private final int zkPort = 2181;
private ByteArrayOutputStream byteArrayOutputStream;
private InputStream inputStream;
private String cmd;
private String testResult;
private String expectedStr;
@Before
public void setUp() {
// mock socket class
PowerMockito.mockStatic(Socket.class);
try {
PowerMockito.whenNew(Socket.class).withNoArguments()
.thenReturn(socket);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* None mock test method, just to check zookeeper status.
* Comment @Before notation to run this test.
* Zookeeper status will be as:
* Zookeeper version: 3.4.11 ...
* Received: 6739707
* Sent: 6739773
* Connections: 20
* Outstanding: 0
* Zxid: 0x9ba
* Mode: standalone
* Node count: 263
*/
public void testCmd() {
// "192.168.64.11"
// final String zkHost = localHost;
final String zkHost = "192.168.64.11";
cmd = "srvr";
try {
// Change localhost to right zk host ip.
final String result = FourLetterWordMain
.send4LetterWord(zkHost, zkPort, cmd);
logger.info(cmd + ": " + result + "<<<");
} catch (Exception e) {
e.printStackTrace();
}
}
@Test
public void testEmptyCmd() {
cmd = "";
expectedStr = "";
testSend4LetterWord(cmd, expectedStr);
}
@Test
public void testNullCmd() {
cmd = null;
try {
testResult = FourLetterWordMain
.send4LetterWord(localHost, zkPort, cmd);
} catch (Exception e) {
testResult = e.getMessage();
}
logger.info("testNullCmd result: " + testResult);
assertEquals("cmd must not be null", testResult);
}
@Test
public void testNullSocketOutput() {
cmd = "test null socket output";
expectedStr = null;
testSend4LetterWord(cmd, expectedStr);
}
@Test
public void testOneLineOutput() {
cmd = "line 1";
// line end without \n
expectedStr = "line 1" + NEW_LINE;
testSend4LetterWord(cmd, expectedStr);
// line end with \n
expectedStr = "line 1\n" + NEW_LINE;
testSend4LetterWord(cmd, expectedStr);
}
@Test
public void testMultiline() {
cmd = "line 1 " + NEW_LINE +
"line 2 " + NEW_LINE +
"line 3 " + NEW_LINE;
expectedStr = cmd + NEW_LINE;
testSend4LetterWord(cmd, expectedStr);
expectedStr = NEW_LINE + NEW_LINE + NEW_LINE;
testSend4LetterWord(cmd, expectedStr);
}
@Test
public void testSocketTimeOut() {
cmd = "test socket time out";
try {
doThrow(new SocketTimeoutException())
.when(socket)
.connect(any(InetSocketAddress.class), Mockito.anyInt());
testResult = FourLetterWordMain
.send4LetterWord(localHost, zkPort, cmd);
} catch (Exception e) {
testResult = e.getMessage();
}
logger.info("testSocketTimeOut result: " + testResult);
assertEquals(
"Exception while executing four letter word: " + cmd,
testResult
);
}
/**
* Test FourLetterWordMain.send4LetterWord() with input cmd and output
* string.
* @param cmd
* @param expectedStr
*/
public void testSend4LetterWord(String cmd, String expectedStr) {
try {
final byte[] strBytes = cmd.getBytes();
byteArrayOutputStream = new ByteArrayOutputStream(strBytes.length);
byteArrayOutputStream.write(strBytes, 0, strBytes.length);
inputStream = new ByteArrayInputStream(expectedStr.getBytes());
when(socket.getOutputStream())
.thenReturn(byteArrayOutputStream);
when(socket.getInputStream()).thenReturn(inputStream);
final String result = FourLetterWordMain
.send4LetterWord(localHost, zkPort, cmd);
logger.info(
"testSend4LetterWord: " +
"cmd: " + cmd +
", expectedStr: " + expectedStr +
", result: " + result + "."
);
Assert.assertEquals(expectedStr, result);
} catch (Exception e) {
e.printStackTrace();
}
}
}

1
pom.xml
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@ -682,6 +682,7 @@
<include>**/common/queue/*.java</include>
<include>**/api/utils/CheckUtilsTest.java</include>
<include>**/api/utils/FileUtilsTest.java</include>
<include>**/api/utils/FourLetterWordTest.java</include>
<include>**/api/utils/exportprocess/DataSourceParamTest.java</include>
<include>**/api/utils/exportprocess/DependentParamTest.java</include>
<include>**/api/enums/*.java</include>

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