diff options
Diffstat (limited to 'sca-java-2.x/tags/2.0.1-RC1/modules/host-corba/src/main/java/org/apache/tuscany/sca/host/corba/SocketUtil.java')
| -rwxr-xr-x | sca-java-2.x/tags/2.0.1-RC1/modules/host-corba/src/main/java/org/apache/tuscany/sca/host/corba/SocketUtil.java | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/host-corba/src/main/java/org/apache/tuscany/sca/host/corba/SocketUtil.java b/sca-java-2.x/tags/2.0.1-RC1/modules/host-corba/src/main/java/org/apache/tuscany/sca/host/corba/SocketUtil.java new file mode 100755 index 0000000000..6989b3ad06 --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/host-corba/src/main/java/org/apache/tuscany/sca/host/corba/SocketUtil.java @@ -0,0 +1,226 @@ +/* + * 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.tuscany.sca.host.corba; + +import java.net.InetAddress; +import java.net.NetworkInterface; +import java.net.UnknownHostException; +import java.util.Enumeration; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; +import java.util.Map; +import java.util.Set; + +/** + * @version $Rev$ $Date$ + * Class partially copied from eclipse wst project + * (http://repo1.maven.org/maven2/org/eclipse/wst/server/core/1.0.205-v20070829b/). + * Finally we should use jar from maven dependency. Problem described in + * http://www.fornax-platform.org/cp/display/fornax/2.+Hello+World+Tutorial+(CSC)?replyToComment=2098#comment-2098 + * needs to be fixed. + */ +public class SocketUtil { + + protected static final Object lock = new Object(); + + private static Set<String> localHostCache; + private static Set<String> notLocalHostCache = new HashSet<String>(); + private static Map<String, CacheThread> threadMap = new HashMap<String, CacheThread>(); + + private static Set<InetAddress> addressCache; + + static class CacheThread extends Thread { + private Set<InetAddress> currentAddresses; + private Set<String> addressList; + private String host; + private Set<String> nonAddressList; + private Map<String, CacheThread> threadMap2; + + public CacheThread(String host, + Set<InetAddress> currentAddresses, + Set<String> addressList, + Set<String> nonAddressList, + Map<String, CacheThread> threadMap2) { + super("Caching localhost information"); + this.host = host; + this.currentAddresses = currentAddresses; + this.addressList = addressList; + this.nonAddressList = nonAddressList; + this.threadMap2 = threadMap2; + } + + public void run() { + if (currentAddresses != null) { + Iterator<InetAddress> iter2 = currentAddresses.iterator(); + while (iter2.hasNext()) { + InetAddress addr = iter2.next(); + String hostname = addr.getHostName(); + String hostname2 = addr.getCanonicalHostName(); + synchronized (lock) { + if (hostname != null && !addressList.contains(hostname)) + addressList.add(hostname); + if (hostname2 != null && !addressList.contains(hostname2)) + addressList.add(hostname2); + } + } + } + + try { + InetAddress[] addrs = InetAddress.getAllByName(host); + int length = addrs.length; + for (int j = 0; j < length; j++) { + InetAddress addr = addrs[0]; + String hostname = addr.getHostName(); + String hostname2 = addr.getCanonicalHostName(); + synchronized (lock) { + if (addr.isLoopbackAddress()) { + if (hostname != null && !addressList.contains(hostname)) + addressList.add(hostname); + if (hostname2 != null && !addressList.contains(hostname2)) + addressList.add(hostname2); + } else { + if (hostname != null && !nonAddressList.contains(hostname)) + nonAddressList.add(hostname); + if (hostname2 != null && !nonAddressList.contains(hostname2)) + nonAddressList.add(hostname2); + } + } + } + } catch (UnknownHostException e) { + synchronized (lock) { + if (host != null && !nonAddressList.contains(host)) + nonAddressList.add(host); + } + } + synchronized (lock) { + threadMap2.remove(host); + } + } + } + + public static boolean isLocalhost(final String host) { + if (host == null || host.equals("")) + return false; + + if ("localhost".equals(host) || "127.0.0.1".equals(host)) + return true; + + // check simple cases + try { + InetAddress localHostaddr = InetAddress.getLocalHost(); + if (localHostaddr.getHostName().equals(host) || host.equals(localHostaddr.getCanonicalHostName()) + || localHostaddr.getHostAddress().equals(host)) + return true; + } catch (Exception e) { + + } + + // check for current thread and wait if necessary + boolean currentThread = false; + try { + Thread t = null; + synchronized (lock) { + t = threadMap.get(host); + } + if (t != null && t.isAlive()) { + currentThread = true; + t.join(30); + } + } catch (Exception e) { + + } + + // check if cache is still ok + boolean refreshedCache = false; + try { + // get network interfaces + final Set<InetAddress> currentAddresses = new HashSet<InetAddress>(); + currentAddresses.add(InetAddress.getLocalHost()); + Enumeration<?> nis = NetworkInterface.getNetworkInterfaces(); + while (nis.hasMoreElements()) { + NetworkInterface inter = (NetworkInterface)nis.nextElement(); + Enumeration<InetAddress> ias = inter.getInetAddresses(); + while (ias.hasMoreElements()) + currentAddresses.add(ias.nextElement()); + } + + // check if cache is empty or old and refill it if necessary + if (addressCache == null || !addressCache.containsAll(currentAddresses) + || !currentAddresses.containsAll(addressCache)) { + CacheThread cacheThread = null; + refreshedCache = true; + + synchronized (lock) { + addressCache = currentAddresses; + notLocalHostCache = new HashSet<String>(); + localHostCache = new HashSet<String>(currentAddresses.size() * 3); + + Iterator<InetAddress> iter = currentAddresses.iterator(); + while (iter.hasNext()) { + InetAddress addr = iter.next(); + String a = addr.getHostAddress(); + if (a != null && !localHostCache.contains(a)) + localHostCache.add(a); + } + + cacheThread = new CacheThread(host, currentAddresses, localHostCache, notLocalHostCache, threadMap); + threadMap.put(host, cacheThread); + cacheThread.setDaemon(true); + cacheThread.setPriority(Thread.NORM_PRIORITY - 1); + cacheThread.start(); + } + cacheThread.join(200); + } + } catch (Exception e) { + } + + synchronized (lock) { + if (localHostCache.contains(host)) + return true; + if (notLocalHostCache.contains(host)) + return false; + } + + // if the cache hasn't been cleared, maybe we still need to lookup the + // host + if (!refreshedCache && !currentThread) { + try { + CacheThread cacheThread = null; + synchronized (lock) { + cacheThread = new CacheThread(host, null, localHostCache, notLocalHostCache, threadMap); + threadMap.put(host, cacheThread); + cacheThread.setDaemon(true); + cacheThread.setPriority(Thread.NORM_PRIORITY - 1); + cacheThread.start(); + } + cacheThread.join(75); + + synchronized (lock) { + if (localHostCache.contains(host)) + return true; + } + } catch (Exception e) { + } + } + return false; + } + +} |