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Introduce TCP & UDP server port scanning utility 

Prior to this commit the Spring Framework did not provide a public means
for scanning for available server ports. However, the Spring Framework
internally used a FreePortScanner in integration tests within its own
test suite. Furthermore, Spring Integration 2.2 provides similar support
in a SocketUtils class in the spring-integration-test module.

This commit introduces SocketUtils in spring-core to replace the
FreePortScanner which was previously only used internally within
Spring's test suite. This new implementation is inspired by both Spring
Framework's FreePortScanner and Spring Integration's SocketUtils and
consequently attempts to merge the best of both previous
implementations.

Issue: SPR-8032
pull/640/head
Sam Brannen 13 years ago
parent
e12311e364
commit
f311bf3daf
6 changed files with 516 additions and 119 deletions
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  1. 323
      spring-core/src/main/java/org/springframework/util/SocketUtils.java
  2. 180
      spring-core/src/test/java/org/springframework/util/SocketUtilsTests.java
  3. 9
      spring-web/src/test/java/org/springframework/http/client/AbstractHttpRequestFactoryTestCase.java
  4. 99
      spring-web/src/test/java/org/springframework/tests/web/FreePortScanner.java
  5. 15
      spring-web/src/test/java/org/springframework/web/client/RestTemplateIntegrationTests.java
  6. 9
      spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestPartIntegrationTests.java

323
spring-core/src/main/java/org/springframework/util/SocketUtils.java
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@ -0,0 +1,323 @@ @@ -0,0 +1,323 @@
/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed 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.springframework.util;
import java.net.DatagramSocket;
import java.net.ServerSocket;
import java.util.Random;
import java.util.SortedSet;
import java.util.TreeSet;
import javax.net.ServerSocketFactory;
/**
* Simple utility methods for working with network sockets — for example,
* for finding available ports on {@code localhost}.
*
* <p>Within this class, a TCP port refers to a port for a {@link ServerSocket};
* whereas, a UDP port refers to a port for a {@link DatagramSocket}.
*
* @author Sam Brannen
* @author Ben Hale
* @author Arjen Poutsma
* @author Gunnar Hillert
* @since 4.0
*/
public final class SocketUtils {
/**
* The default minimum value for port ranges used when finding an available
* socket port.
*/
public static final int PORT_RANGE_MIN = 1024;
/**
* The default maximum value for port ranges used when finding an available
* socket port.
*/
public static final int PORT_RANGE_MAX = 65535;
private static final Random random = new Random(System.currentTimeMillis());
/**
* Although {@code SocketUtils} consists solely of static utility methods,
* this constructor is intentionally {@code public}.
*
* <h4>Rationale</h4>
*
* <p>Static methods from this class may be invoked from within XML
* configuration files using the Spring Expression Language (SpEL) and the
* following syntax.
*
* <pre><code>&lt;bean id="bean1" ... p:port="#{T(org.springframework.util.SocketUtils).findAvailableTcpPort(12000)}" /&gt;</code></pre>
*
* If this constructor were {@code private}, you would be required to supply
* the fully qualified class name to SpEL's {@code T()} function for each usage.
* Thus, the fact that this constructor is {@code public} allows you to reduce
* boilerplate configuration with SpEL as can be seen in the following example.
*
* <pre><code>&lt;bean id="socketUtils" class="org.springframework.util.SocketUtils" /&gt;
*
*&lt;bean id="bean1" ... p:port="#{socketUtils.findAvailableTcpPort(12000)}" /&gt;
*
*&lt;bean id="bean2" ... p:port="#{socketUtils.findAvailableTcpPort(30000)}" /&gt;</code></pre>
*/
public SocketUtils() {
/* no-op */
}
/**
* Find an available TCP port randomly selected from the range
* [{@value #PORT_RANGE_MIN}, {@value #PORT_RANGE_MAX}].
*
* @return an available TCP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableTcpPort() {
return findAvailableTcpPort(PORT_RANGE_MIN);
}
/**
* Find an available TCP port randomly selected from the range
* [{@code minPort}, {@value #PORT_RANGE_MAX}].
*
* @param minPort the minimum port number
* @return an available TCP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableTcpPort(int minPort) {
return findAvailableTcpPort(minPort, PORT_RANGE_MAX);
}
/**
* Find an available TCP port randomly selected from the range
* [{@code minPort}, {@code maxPort}].
*
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return an available TCP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableTcpPort(int minPort, int maxPort) {
return SocketType.TCP.findAvailablePort(minPort, maxPort);
}
/**
* Find the requested number of available TCP ports, each randomly selected
* from the range [{@value #PORT_RANGE_MIN}, {@value #PORT_RANGE_MAX}].
*
* @param numRequested the number of available ports to find
* @return a sorted set of available TCP port numbers
* @throws IllegalStateException if the requested number of available ports could not be found
*/
public static SortedSet<Integer> findAvailableTcpPorts(int numRequested) {
return findAvailableTcpPorts(numRequested, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
/**
* Find the requested number of available TCP ports, each randomly selected
* from the range [{@code minPort}, {@code maxPort}].
*
* @param numRequested the number of available ports to find
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return a sorted set of available TCP port numbers
* @throws IllegalStateException if the requested number of available ports could not be found
*/
public static SortedSet<Integer> findAvailableTcpPorts(int numRequested, int minPort, int maxPort) {
return SocketType.TCP.findAvailablePorts(numRequested, minPort, maxPort);
}
/**
* Find an available UDP port randomly selected from the range
* [{@value #PORT_RANGE_MIN}, {@value #PORT_RANGE_MAX}].
*
* @return an available UDP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableUdpPort() {
return findAvailableUdpPort(PORT_RANGE_MIN);
}
/**
* Find an available UDP port randomly selected from the range
* [{@code minPort}, {@value #PORT_RANGE_MAX}].
*
* @param minPort the minimum port number
* @return an available UDP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableUdpPort(int minPort) {
return findAvailableUdpPort(minPort, PORT_RANGE_MAX);
}
/**
* Find an available UDP port randomly selected from the range
* [{@code minPort}, {@code maxPort}].
*
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return an available UDP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableUdpPort(int minPort, int maxPort) {
return SocketType.UDP.findAvailablePort(minPort, maxPort);
}
/**
* Find the requested number of available UDP ports, each randomly selected
* from the range [{@value #PORT_RANGE_MIN}, {@value #PORT_RANGE_MAX}].
*
* @param numRequested the number of available ports to find
* @return a sorted set of available UDP port numbers
* @throws IllegalStateException if the requested number of available ports could not be found
*/
public static SortedSet<Integer> findAvailableUdpPorts(int numRequested) {
return findAvailableUdpPorts(numRequested, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
/**
* Find the requested number of available UDP ports, each randomly selected
* from the range [{@code minPort}, {@code maxPort}].
*
* @param numRequested the number of available ports to find
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return a sorted set of available UDP port numbers
* @throws IllegalStateException if the requested number of available ports could not be found
*/
public static SortedSet<Integer> findAvailableUdpPorts(int numRequested, int minPort, int maxPort) {
return SocketType.UDP.findAvailablePorts(numRequested, minPort, maxPort);
}
private static enum SocketType {
TCP {
@Override
protected boolean isPortAvailable(int port) {
try {
ServerSocket serverSocket = ServerSocketFactory.getDefault().createServerSocket(port);
serverSocket.close();
return true;
}
catch (Exception ex) {
return false;
}
}
},
UDP {
@Override
protected boolean isPortAvailable(int port) {
try {
DatagramSocket socket = new DatagramSocket(port);
socket.close();
return true;
}
catch (Exception ex) {
return false;
}
}
};
/**
* Determine if the specified port for this {@code SocketType} is
* currently available on {@code localhost}.
*/
protected abstract boolean isPortAvailable(int port);
/**
* Find a pseudo-random port number within the range
* [{@code minPort}, {@code maxPort}].
*
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return a random port number within the specified range
*/
private int findRandomPort(int minPort, int maxPort) {
int portRange = maxPort - minPort;
return minPort + random.nextInt(portRange);
}
/**
* Find an available port for this {@code SocketType}, randomly selected
* from the range [{@code minPort}, {@code maxPort}].
*
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return an available port number for this socket type
* @throws IllegalStateException if no available port could be found
*/
int findAvailablePort(int minPort, int maxPort) {
Assert.isTrue(minPort > 0, "'minPort' must be greater than 0");
Assert.isTrue(maxPort > minPort, "'maxPort' must be greater than 'minPort'");
Assert.isTrue(maxPort <= PORT_RANGE_MAX, "'maxPort' must be less than or equal to " + PORT_RANGE_MAX);
int portRange = maxPort - minPort;
int candidatePort;
int searchCounter = 0;
do {
if (++searchCounter > portRange) {
throw new IllegalStateException(String.format(
"Could not find an available %s port in the range [%d, %d] after %d attempts", name(), minPort,
maxPort, searchCounter));
}
candidatePort = findRandomPort(minPort, maxPort);
} while (!isPortAvailable(candidatePort));
return candidatePort;
}
/**
* Find the requested number of available ports for this {@code SocketType},
* each randomly selected from the range [{@code minPort}, {@code maxPort}].
*
* @param numRequested the number of available ports to find
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return a sorted set of available port numbers for this socket type
* @throws IllegalStateException if the requested number of available ports could not be found
*/
SortedSet<Integer> findAvailablePorts(int numRequested, int minPort, int maxPort) {
Assert.isTrue(minPort > 0, "'minPort' must be greater than 0");
Assert.isTrue(maxPort > minPort, "'maxPort' must be greater than 'minPort'");
Assert.isTrue(maxPort <= PORT_RANGE_MAX, "'maxPort' must be less than or equal to " + PORT_RANGE_MAX);
Assert.isTrue(numRequested > 0, "'numRequested' must be greater than 0");
Assert.isTrue((maxPort - minPort) >= numRequested,
"'numRequested' must not be greater than 'maxPort' - 'minPort'");
final SortedSet<Integer> availablePorts = new TreeSet<Integer>();
int attemptCount = 0;
while ((++attemptCount <= numRequested + 100) && (availablePorts.size() < numRequested)) {
availablePorts.add(findAvailablePort(minPort, maxPort));
}
if (availablePorts.size() != numRequested) {
throw new IllegalStateException(String.format(
"Could not find %d available %s ports in the range [%d, %d]", numRequested, name(), minPort,
maxPort));
}
return availablePorts;
}
}
}

180
spring-core/src/test/java/org/springframework/util/SocketUtilsTests.java
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@ -0,0 +1,180 @@ @@ -0,0 +1,180 @@
/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed 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.springframework.util;
import java.util.SortedSet;
import org.junit.Test;
import static org.junit.Assert.*;
import static org.springframework.util.SocketUtils.*;
/**
* Unit tests for {@link SocketUtils}.
*
* @author Sam Brannen
* @since 4.0
*/
public class SocketUtilsTests {
private void assertPortInRange(int port, int minPort, int maxPort) {
assertTrue("port [" + port + "] >= " + minPort, port >= minPort);
assertTrue("port [" + port + "] <= " + maxPort, port <= maxPort);
}
private void assertAvailablePorts(SortedSet<Integer> ports, int numRequested, int minPort, int maxPort) {
assertEquals("number of ports requested", numRequested, ports.size());
for (int port : ports) {
assertPortInRange(port, minPort, maxPort);
}
}
// --- TCP -----------------------------------------------------------------
@Test(expected = IllegalArgumentException.class)
public void findAvailableTcpPortWithZeroMinPort() {
SocketUtils.findAvailableTcpPort(0);
}
@Test(expected = IllegalArgumentException.class)
public void findAvailableTcpPortWithNegativeMinPort() {
SocketUtils.findAvailableTcpPort(-500);
}
@Test
public void findAvailableTcpPort() {
int port = SocketUtils.findAvailableTcpPort();
assertPortInRange(port, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
@Test
public void findAvailableTcpPortWithMin() {
int port = SocketUtils.findAvailableTcpPort(50000);
assertPortInRange(port, 50000, PORT_RANGE_MAX);
}
@Test
public void findAvailableTcpPortInRange() {
int minPort = 20000;
int maxPort = minPort + 1000;
int port = SocketUtils.findAvailableTcpPort(minPort, maxPort);
assertPortInRange(port, minPort, maxPort);
}
@Test
public void find4AvailableTcpPorts() {
findAvailableTcpPorts(4);
}
@Test
public void find50AvailableTcpPorts() {
findAvailableTcpPorts(50);
}
@Test
public void find4AvailableTcpPortsInRange() {
findAvailableTcpPorts(4, 30000, 35000);
}
@Test
public void find50AvailableTcpPortsInRange() {
findAvailableTcpPorts(50, 40000, 45000);
}
@Test(expected = IllegalArgumentException.class)
public void findAvailableTcpPortsWithRequestedNumberGreaterThanSizeOfRange() {
findAvailableTcpPorts(50, 45000, 45010);
}
private void findAvailableTcpPorts(int numRequested) {
SortedSet<Integer> ports = SocketUtils.findAvailableTcpPorts(numRequested);
assertAvailablePorts(ports, numRequested, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
private void findAvailableTcpPorts(int numRequested, int minPort, int maxPort) {
SortedSet<Integer> ports = SocketUtils.findAvailableTcpPorts(numRequested, minPort, maxPort);
assertAvailablePorts(ports, numRequested, minPort, maxPort);
}
// --- UDP -----------------------------------------------------------------
@Test(expected = IllegalArgumentException.class)
public void findAvailableUdpPortWithZeroMinPort() {
SocketUtils.findAvailableUdpPort(0);
}
@Test(expected = IllegalArgumentException.class)
public void findAvailableUdpPortWithNegativeMinPort() {
SocketUtils.findAvailableUdpPort(-500);
}
@Test
public void findAvailableUdpPort() {
int port = SocketUtils.findAvailableUdpPort();
assertPortInRange(port, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
@Test
public void findAvailableUdpPortWithMin() {
int port = SocketUtils.findAvailableUdpPort(50000);
assertPortInRange(port, 50000, PORT_RANGE_MAX);
}
@Test
public void findAvailableUdpPortInRange() {
int minPort = 20000;
int maxPort = minPort + 1000;
int port = SocketUtils.findAvailableUdpPort(minPort, maxPort);
assertPortInRange(port, minPort, maxPort);
}
@Test
public void find4AvailableUdpPorts() {
findAvailableUdpPorts(4);
}
@Test
public void find50AvailableUdpPorts() {
findAvailableUdpPorts(50);
}
@Test
public void find4AvailableUdpPortsInRange() {
findAvailableUdpPorts(4, 30000, 35000);
}
@Test
public void find50AvailableUdpPortsInRange() {
findAvailableUdpPorts(50, 40000, 45000);
}
@Test(expected = IllegalArgumentException.class)
public void findAvailableUdpPortsWithRequestedNumberGreaterThanSizeOfRange() {
findAvailableUdpPorts(50, 45000, 45010);
}
private void findAvailableUdpPorts(int numRequested) {
SortedSet<Integer> ports = SocketUtils.findAvailableUdpPorts(numRequested);
assertAvailablePorts(ports, numRequested, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
private void findAvailableUdpPorts(int numRequested, int minPort, int maxPort) {
SortedSet<Integer> ports = SocketUtils.findAvailableUdpPorts(numRequested, minPort, maxPort);
assertAvailablePorts(ports, numRequested, minPort, maxPort);
}
}

9
spring-web/src/test/java/org/springframework/http/client/AbstractHttpRequestFactoryTestCase.java
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@ -16,9 +16,6 @@ @@ -16,9 +16,6 @@
package org.springframework.http.client;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
@ -43,8 +40,10 @@ import org.junit.BeforeClass; @@ -43,8 +40,10 @@ import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.tests.web.FreePortScanner;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.SocketUtils;
import static org.junit.Assert.*;
public abstract class AbstractHttpRequestFactoryTestCase {
@ -56,7 +55,7 @@ public abstract class AbstractHttpRequestFactoryTestCase { @@ -56,7 +55,7 @@ public abstract class AbstractHttpRequestFactoryTestCase {
@BeforeClass
public static void startJettyServer() throws Exception {
int port = FreePortScanner.getFreePort();
int port = SocketUtils.findAvailableTcpPort();
jettyServer = new Server(port);
baseUrl = "http://localhost:" + port;

99
spring-web/src/test/java/org/springframework/tests/web/FreePortScanner.java
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@ -1,99 +0,0 @@ @@ -1,99 +0,0 @@
/*
* Copyright 2002-2012 the original author or authors.
*
* Licensed 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.springframework.tests.web;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.util.Random;
import org.springframework.util.Assert;
/**
* Utility class that finds free BSD ports for use in testing scenario's.
*
* @author Ben Hale
* @author Arjen Poutsma
*/
public abstract class FreePortScanner {
private static final int MIN_SAFE_PORT = 1024;
private static final int MAX_PORT = 65535;
private static final Random random = new Random();
/**
* Returns the number of a free port in the default range.
*/
public static int getFreePort() {
return getFreePort(MIN_SAFE_PORT, MAX_PORT);
}
/**
* Returns the number of a free port in the given range.
*/
public static int getFreePort(int minPort, int maxPort) {
Assert.isTrue(minPort > 0, "'minPort' must be larger than 0");
Assert.isTrue(maxPort > minPort, "'maxPort' must be larger than minPort");
int portRange = maxPort - minPort;
int candidatePort;
int searchCounter = 0;
do {
if (++searchCounter > portRange) {
throw new IllegalStateException(
String.format("There were no ports available in the range %d to %d", minPort, maxPort));
}
candidatePort = getRandomPort(minPort, portRange);
}
while (!isPortAvailable(candidatePort));
return candidatePort;
}
private static int getRandomPort(int minPort, int portRange) {
return minPort + random.nextInt(portRange);
}
private static boolean isPortAvailable(int port) {
ServerSocket serverSocket;
try {
serverSocket = new ServerSocket();
}
catch (IOException ex) {
throw new IllegalStateException("Unable to create ServerSocket.", ex);
}
try {
InetSocketAddress sa = new InetSocketAddress(port);
serverSocket.bind(sa);
return true;
}
catch (IOException ex) {
return false;
}
finally {
try {
serverSocket.close();
}
catch (IOException ex) {
// ignore
}
}
}
}

15
spring-web/src/test/java/org/springframework/web/client/RestTemplateIntegrationTests.java
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@ -16,14 +16,6 @@ @@ -16,14 +16,6 @@
package org.springframework.web.client;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
@ -63,10 +55,12 @@ import org.springframework.http.HttpStatus; @@ -63,10 +55,12 @@ import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.tests.web.FreePortScanner;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.util.SocketUtils;
import static org.junit.Assert.*;
/** @author Arjen Poutsma */
public class RestTemplateIntegrationTests {
@ -83,7 +77,7 @@ public class RestTemplateIntegrationTests { @@ -83,7 +77,7 @@ public class RestTemplateIntegrationTests {
@BeforeClass
public static void startJettyServer() throws Exception {
int port = FreePortScanner.getFreePort();
int port = SocketUtils.findAvailableTcpPort();
jettyServer = new Server(port);
baseUrl = "http://localhost:" + port;
ServletContextHandler handler = new ServletContextHandler();
@ -243,6 +237,7 @@ public class RestTemplateIntegrationTests { @@ -243,6 +237,7 @@ public class RestTemplateIntegrationTests {
}
@Test
@SuppressWarnings("unchecked")
public void exchangeGet() throws Exception {
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.set("MyHeader", "MyValue");

9
spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestPartIntegrationTests.java
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@ -16,8 +16,6 @@ @@ -16,8 +16,6 @@
package org.springframework.web.servlet.mvc.method.annotation;
import static org.junit.Assert.assertEquals;
import java.net.URI;
import java.util.Arrays;
@ -42,9 +40,9 @@ import org.springframework.http.converter.ResourceHttpMessageConverter; @@ -42,9 +40,9 @@ import org.springframework.http.converter.ResourceHttpMessageConverter;
import org.springframework.http.converter.json.MappingJacksonHttpMessageConverter;
import org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter;
import org.springframework.stereotype.Controller;
import org.springframework.tests.web.FreePortScanner;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.util.SocketUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestPart;
@ -58,6 +56,8 @@ import org.springframework.web.servlet.DispatcherServlet; @@ -58,6 +56,8 @@ import org.springframework.web.servlet.DispatcherServlet;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import static org.junit.Assert.*;
/**
* Test access to parts of a multipart request with {@link RequestPart}.
*
@ -74,8 +74,7 @@ public class RequestPartIntegrationTests { @@ -74,8 +74,7 @@ public class RequestPartIntegrationTests {
@BeforeClass
public static void startServer() throws Exception {
int port = FreePortScanner.getFreePort();
int port = SocketUtils.findAvailableTcpPort();
baseUrl = "http://localhost:" + port;
server = new Server(port);

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