diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/IsReachable.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/IsReachable.java | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/IsReachable.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/IsReachable.java deleted file mode 100644 index e699da11..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/IsReachable.java +++ /dev/null @@ -1,207 +0,0 @@ -/* - * 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.tools.ant.taskdefs.condition; - -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.net.InetAddress; -import java.net.MalformedURLException; -import java.net.URL; -import java.net.UnknownHostException; - -import org.apache.tools.ant.BuildException; -import org.apache.tools.ant.Project; -import org.apache.tools.ant.ProjectComponent; - -/** - * <p>Test for a host being reachable using ICMP "ping" packets & echo operations. - * Ping packets are very reliable for assessing reachability in a LAN or WAN, - * but they do not get through any well-configured firewall. Echo (port 7) may.</p> - * - * <p>This condition turns unknown host exceptions into false conditions. This is - * because on a laptop, DNS is one of the first services lost when the network - * goes; you are implicitly offline.</p> - * - * <p>If a URL is supplied instead of a host, the hostname is extracted and used in - * the test--all other parts of the URL are discarded.</p> - * - * <p>The test may not work through firewalls; that is, something may be reachable - * using a protocol such as HTTP, while the lower level ICMP packets get dropped - * on the floor. Similarly, a host may be detected as reachable with ICMP, but not - * reachable on other ports (i.e. port 80), because of firewalls.</p> - * - * <p>Requires Java 5+ to work properly. On Java 1.4, if a hostname - * can be resolved, the destination is assumed to be reachable.</p> - * - * @since Ant 1.7 - */ -public class IsReachable extends ProjectComponent implements Condition { - - private static final int SECOND = 1000; // millis per second - private String host; - private String url; - - /** - * The default timeout. - */ - public static final int DEFAULT_TIMEOUT = 30; - private int timeout = DEFAULT_TIMEOUT; - /** - * Error when no hostname is defined - */ - public static final String ERROR_NO_HOSTNAME = "No hostname defined"; - /** - * Error when invalid timeout value is defined - */ - public static final String ERROR_BAD_TIMEOUT = "Invalid timeout value"; - /** - * Unknown host message is seen. - */ - private static final String WARN_UNKNOWN_HOST = "Unknown host: "; - /** - * Network error message is seen. - */ - public static final String ERROR_ON_NETWORK = "network error to "; - /** Error message when url and host are specified. */ - public static final String ERROR_BOTH_TARGETS - = "Both url and host have been specified"; - /** Error message when no reachably test avail. */ - public static final String MSG_NO_REACHABLE_TEST - = "cannot do a proper reachability test on this Java version"; - /** Error message when an invalid url is used. */ - public static final String ERROR_BAD_URL = "Bad URL "; - /** Error message when no hostname in url. */ - public static final String ERROR_NO_HOST_IN_URL = "No hostname in URL "; - /** The method name to look for in InetAddress */ - public static final String METHOD_NAME = "isReachable"; - - /** - * Set the host to ping. - * - * @param host the host to ping. - */ - public void setHost(final String host) { - this.host = host; - } - - /** - * Set the URL from which to extract the hostname. - * - * @param url a URL object. - */ - public void setUrl(final String url) { - this.url = url; - } - - /** - * Set the timeout for the reachability test in seconds. - * - * @param timeout the timeout in seconds. - */ - public void setTimeout(final int timeout) { - this.timeout = timeout; - } - - /** - * emptyness test - * - * @param string param to check - * - * @return true if it is empty - */ - private boolean empty(final String string) { - return string == null || string.length() == 0; - } - - private static Class[] parameterTypes = {Integer.TYPE}; - - /** - * Evaluate the condition. - * - * @return true if the condition is true. - * - * @throws org.apache.tools.ant.BuildException - * if an error occurs - */ - public boolean eval() throws BuildException { - if (empty(host) && empty(url)) { - throw new BuildException(ERROR_NO_HOSTNAME); - } - if (timeout < 0) { - throw new BuildException(ERROR_BAD_TIMEOUT); - } - String target = host; - if (!empty(url)) { - if (!empty(host)) { - throw new BuildException(ERROR_BOTH_TARGETS); - } - try { - //get the host of a url - final URL realURL = new URL(url); - target = realURL.getHost(); - if (empty(target)) { - throw new BuildException(ERROR_NO_HOST_IN_URL + url); - } - } catch (final MalformedURLException e) { - throw new BuildException(ERROR_BAD_URL + url, e); - } - } - log("Probing host " + target, Project.MSG_VERBOSE); - InetAddress address; - try { - address = InetAddress.getByName(target); - } catch (final UnknownHostException e1) { - log(WARN_UNKNOWN_HOST + target); - return false; - } - log("Host address = " + address.getHostAddress(), - Project.MSG_VERBOSE); - boolean reachable; - //Java1.5: reachable = address.isReachable(timeout * 1000); - Method reachableMethod = null; - try { - reachableMethod = InetAddress.class.getMethod(METHOD_NAME, - parameterTypes); - final Object[] params = new Object[1]; - params[0] = new Integer(timeout * SECOND); - try { - reachable = ((Boolean) reachableMethod.invoke(address, params)) - .booleanValue(); - } catch (final IllegalAccessException e) { - //utterly implausible, but catered for anyway - throw new BuildException("When calling " + reachableMethod); - } catch (final InvocationTargetException e) { - //assume this is an IOexception about un readability - final Throwable nested = e.getTargetException(); - log(ERROR_ON_NETWORK + target + ": " + nested.toString()); - //any kind of fault: not reachable. - reachable = false; - } - } catch (final NoSuchMethodException e) { - //java1.4 - log("Not found: InetAddress." + METHOD_NAME, Project.MSG_VERBOSE); - log(MSG_NO_REACHABLE_TEST); - reachable = true; - - } - - log("host is" + (reachable ? "" : " not") + " reachable", Project.MSG_VERBOSE); - return reachable; - } -} |