Make compatible with java5
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2
pom.xml
2
pom.xml
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@ -329,7 +329,7 @@
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<configuration>
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<signature>
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<groupId>org.codehaus.mojo.signature</groupId>
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<artifactId>java16</artifactId>
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<artifactId>java15</artifactId>
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<version>1.0</version>
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</signature>
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<ignores>
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@ -15,20 +15,7 @@
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*/
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package org.jboss.netty.util;
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import org.jboss.netty.logging.InternalLogger;
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import org.jboss.netty.logging.InternalLoggerFactory;
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import java.io.BufferedReader;
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import java.io.FileReader;
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import java.io.IOException;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.NetworkInterface;
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import java.net.ServerSocket;
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import java.net.Socket;
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import java.net.SocketException;
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import java.util.ArrayList;
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import java.util.Enumeration;
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import java.util.StringTokenizer;
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/**
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@ -40,148 +27,6 @@ import java.util.StringTokenizer;
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*/
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public final class NetUtil {
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/**
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* The {@link InetAddress} representing the host machine
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* <p/>
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* We cache this because some machines take almost forever to return from
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* {@link InetAddress}.getLocalHost(). This may be due to incorrect
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* configuration of the hosts and DNS client configuration files.
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*/
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public static final InetAddress LOCALHOST;
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/**
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* The loopback {@link NetworkInterface} on the current machine
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*/
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public static final NetworkInterface LOOPBACK_IF;
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/**
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* The SOMAXCONN value of the current machine. If failed to get the value, 3072 is used as a
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* default value.
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*/
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public static final int SOMAXCONN;
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/**
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* The logger being used by this class
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*/
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private static final InternalLogger logger =
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InternalLoggerFactory.getInstance(NetUtil.class);
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static {
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//Start the process of discovering localhost
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InetAddress localhost;
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try {
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localhost = InetAddress.getLocalHost();
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validateHost(localhost);
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} catch (IOException e) {
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// The default local host names did not work. Try hard-coded IPv4 address.
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try {
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localhost = InetAddress.getByAddress(new byte[]{127, 0, 0, 1});
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validateHost(localhost);
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} catch (IOException e1) {
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// The hard-coded IPv4 address did not work. Try hard coded IPv6 address.
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try {
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localhost = InetAddress.getByAddress(new byte[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1});
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validateHost(localhost);
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} catch (IOException e2) {
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throw new Error("Failed to resolve localhost - incorrect network configuration?", e2);
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}
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}
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}
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LOCALHOST = localhost;
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//Prepare to get the local NetworkInterface
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NetworkInterface loopbackInterface;
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try {
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//Automatically get the loopback interface
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loopbackInterface = NetworkInterface.getByInetAddress(LOCALHOST);
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} catch (SocketException e) {
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//No? Alright. There is a backup!
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loopbackInterface = null;
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}
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//Check to see if a network interface was not found
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if (loopbackInterface == null) {
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try {
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//Start iterating over all network interfaces
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for (Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
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interfaces.hasMoreElements();) {
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//Get the "next" interface
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NetworkInterface networkInterface = interfaces.nextElement();
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//Check to see if the interface is a loopback interface
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if (networkInterface.isLoopback()) {
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//Phew! The loopback interface was found.
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loopbackInterface = networkInterface;
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//No need to keep iterating
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break;
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}
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}
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} catch (SocketException e) {
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//Nope. Can't do anything else, sorry!
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logger.error("Failed to enumerate network interfaces", e);
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}
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}
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//Set the loopback interface constant
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LOOPBACK_IF = loopbackInterface;
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int somaxconn = 3072;
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BufferedReader in = null;
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try {
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in = new BufferedReader(new FileReader("/proc/sys/net/core/somaxconn"));
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somaxconn = Integer.parseInt(in.readLine());
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} catch (Exception e) {
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// Failed to get SOMAXCONN
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} finally {
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if (in != null) {
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try {
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in.close();
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} catch (Exception e) {
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// Ignored.
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}
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}
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}
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SOMAXCONN = somaxconn;
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}
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private static void validateHost(InetAddress host) throws IOException {
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ServerSocket ss = null;
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Socket s1 = null;
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Socket s2 = null;
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try {
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ss = new ServerSocket();
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ss.setReuseAddress(false);
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ss.bind(new InetSocketAddress(host, 0));
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s1 = new Socket(host, ss.getLocalPort());
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s2 = ss.accept();
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} finally {
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if (s2 != null) {
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try {
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s2.close();
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} catch (IOException e) {
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// Ignore
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}
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}
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if (s1 != null) {
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try {
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s1.close();
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} catch (IOException e) {
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// Ignore
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}
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}
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if (ss != null) {
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try {
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ss.close();
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} catch (IOException e) {
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// Ignore
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}
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}
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}
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}
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/**
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* Creates an byte[] based on an ipAddressString. No error handling is
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* performed here.
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@ -231,7 +76,7 @@ public final class NetUtil {
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if (":".equals(token)) {
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if (":".equals(prevToken)) {
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doubleColonIndex = hexStrings.size();
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} else if (!prevToken.isEmpty()) {
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} else if (prevToken.length() > 0) {
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hexStrings.add(prevToken);
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}
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} else if (".".equals(token)) {
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@ -249,16 +249,6 @@ public class NetUtilTest {
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}
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};
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@Test
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public void testLocalhost() {
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assertNotNull(NetUtil.LOCALHOST);
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}
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@Test
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public void testLoopback() {
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assertNotNull(NetUtil.LOOPBACK_IF);
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}
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@Test
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public void testIsValidIpV4Address() {
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for (String host : validIpV4Hosts.keySet()) {
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