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/* |
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* The Apache Software License, Version 1.1 |
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* |
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* Copyright (c) 2003 The Apache Software Foundation. All rights |
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* reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, if |
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* any, must include the following acknowlegement: |
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* "This product includes software developed by the |
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* Apache Software Foundation (http://www.apache.org/)." |
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* Alternately, this acknowlegement may appear in the software itself, |
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* if and wherever such third-party acknowlegements normally appear. |
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* |
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* 4. The names "Ant" and "Apache Software |
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* Foundation" must not be used to endorse or promote products derived |
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* from this software without prior written permission. For written |
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* permission, please contact apache@apache.org. |
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* |
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* 5. Products derived from this software may not be called "Apache" |
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* nor may "Apache" appear in their names without prior written |
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* permission of the Apache Group. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of the Apache Software Foundation. For more |
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* information on the Apache Software Foundation, please see |
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* <http://www.apache.org/>. |
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*/ |
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package org.apache.tools.ant.taskdefs.optional.net; |
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import org.apache.commons.net.bsd.RExecClient; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import java.util.Calendar; |
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import java.util.Enumeration; |
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import java.util.Vector; |
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import org.apache.tools.ant.BuildException; |
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import org.apache.tools.ant.Project; |
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import org.apache.tools.ant.Task; |
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/** |
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* Automates the rexec protocol. |
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* |
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* @since Ant 1.6 |
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*/ |
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public class RExecTask extends Task { |
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/** |
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* The userid to login with, if automated login is used |
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*/ |
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private String userid = null; |
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/** |
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* The password to login with, if automated login is used |
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*/ |
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private String password = null; |
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/** |
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* The command to execute |
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*/ |
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private String command = null; |
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/** |
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* The server to connect to. |
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*/ |
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private String server = null; |
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/** |
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* The tcp port to connect to. |
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*/ |
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private int port = RExecClient.DEFAULT_PORT; |
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/** |
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* The Object which handles the rexec session. |
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*/ |
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private AntRExecClient rexec = null; |
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/** |
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* The list of read/write commands for this session |
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*/ |
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private Vector rexecTasks = new Vector(); |
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/** |
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* If true, adds a CR to beginning of login script |
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*/ |
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private boolean addCarriageReturn = false; |
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/** |
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* Default time allowed for waiting for a valid response |
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* for all child reads. A value of 0 means no limit. |
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*/ |
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private Integer defaultTimeout = null; |
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/** |
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* This class is the parent of the Read and Write tasks. |
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* It handles the common attributes for both. |
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*/ |
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public class RExecSubTask { |
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protected String taskString = ""; |
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public void execute(AntRExecClient rexec) |
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throws BuildException { |
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throw new BuildException("Shouldn't be able instantiate a SubTask directly"); |
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} |
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/** |
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* the message as nested text |
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*/ |
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public void addText(String s) { |
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setString(getProject().replaceProperties(s)); |
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} |
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/** |
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* the message as an attribute |
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*/ |
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public void setString(String s) { |
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taskString += s; |
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} |
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} |
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/** |
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* Sends text to the connected server |
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*/ |
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public class RExecWrite extends RExecSubTask { |
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private boolean echoString = true; |
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public void execute(AntRExecClient rexec) |
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throws BuildException { |
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rexec.sendString(taskString, echoString); |
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} |
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/** |
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* Whether or not the message should be echoed to the log. |
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* Defaults to <code>true</code>. |
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*/ |
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public void setEcho(boolean b) { |
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echoString = b; |
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} |
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} |
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/** |
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* Reads the output from the connected server |
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* until the required string is found or we time out. |
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*/ |
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public class RExecRead extends RExecSubTask { |
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private Integer timeout = null; |
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public void execute(AntRExecClient rexec) |
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throws BuildException { |
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rexec.waitForString(taskString, timeout); |
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} |
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/** |
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* a timeout value that overrides any task wide timeout. |
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*/ |
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public void setTimeout(Integer i) { |
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this.timeout = i; |
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} |
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/** |
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* Sets the default timeout if none has been set already |
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* @ant.attribute ignore="true" |
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*/ |
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public void setDefaultTimeout(Integer defaultTimeout) { |
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if (timeout == null) { |
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timeout = defaultTimeout; |
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} |
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} |
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} |
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/** |
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* This class handles the abstraction of the rexec protocol. |
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* Currently it is a wrapper around <a |
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* href="http://jakarta.apache.org/commons/net/index.html">Jakarta |
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* Commons Net</a>. |
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*/ |
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public class AntRExecClient extends RExecClient { |
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/** |
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* Read from the rexec session until the string we are |
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* waiting for is found |
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* @param s The string to wait on |
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*/ |
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public void waitForString(String s) { |
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waitForString(s, null); |
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} |
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/** |
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* Read from the rexec session until the string we are |
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* waiting for is found or the timeout has been reached |
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* @param s The string to wait on |
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* @param timeout The maximum number of seconds to wait |
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*/ |
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public void waitForString(String s, Integer timeout) { |
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InputStream is = this.getInputStream(); |
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try { |
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StringBuffer sb = new StringBuffer(); |
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if (timeout == null || timeout.intValue() == 0) { |
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while (sb.toString().indexOf(s) == -1) { |
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sb.append((char) is.read()); |
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} |
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} else { |
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Calendar endTime = Calendar.getInstance(); |
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endTime.add(Calendar.SECOND, timeout.intValue()); |
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while (sb.toString().indexOf(s) == -1) { |
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while (Calendar.getInstance().before(endTime) && |
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is.available() == 0) { |
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Thread.sleep(250); |
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} |
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if (is.available() == 0) { |
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throw new BuildException( |
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"Response timed-out waiting for \"" + s + '\"', |
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getLocation()); |
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} |
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sb.append((char) is.read()); |
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} |
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} |
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log(sb.toString(), Project.MSG_INFO); |
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} catch (BuildException be) { |
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throw be; |
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} catch (Exception e) { |
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throw new BuildException(e, getLocation()); |
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} |
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} |
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/** |
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* Write this string to the rexec session. |
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* @param echoString Logs string sent |
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*/ |
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public void sendString(String s, boolean echoString) { |
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OutputStream os = this.getOutputStream(); |
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try { |
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os.write((s + "\n").getBytes()); |
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if (echoString) { |
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log(s, Project.MSG_INFO); |
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} |
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os.flush(); |
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} catch (Exception e) { |
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throw new BuildException(e, getLocation()); |
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} |
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} |
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/** |
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* Read from the rexec session until the EOF is found or |
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* the timeout has been reached |
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* @param timeout The maximum number of seconds to wait |
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*/ |
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public void waitForEOF(Integer timeout) { |
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InputStream is = this.getInputStream(); |
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try { |
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StringBuffer sb = new StringBuffer(); |
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if (timeout == null || timeout.intValue() == 0) { |
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int read; |
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while ((read = is.read()) != -1) { |
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char c = (char) read; |
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sb.append(c); |
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if (c == '\n') { |
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log(sb.toString(), Project.MSG_INFO); |
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sb.delete(0, sb.length()); |
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} |
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} |
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} else { |
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Calendar endTime = Calendar.getInstance(); |
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endTime.add(Calendar.SECOND, timeout.intValue()); |
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int read = 0; |
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while (read != -1) { |
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while (Calendar.getInstance().before(endTime) && is.available() == 0) { |
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Thread.sleep(250); |
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} |
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if (is.available() == 0) { |
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log(sb.toString(), Project.MSG_INFO); |
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throw new BuildException( |
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"Response timed-out waiting for EOF", |
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getLocation()); |
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} |
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read = is.read(); |
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if (read != -1) { |
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char c = (char) read; |
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sb.append(c); |
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if (c == '\n') { |
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log(sb.toString(), Project.MSG_INFO); |
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sb.delete(0, sb.length()); |
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} |
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} |
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} |
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} |
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if (sb.length() > 0) { |
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log(sb.toString(), Project.MSG_INFO); |
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} |
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} catch (BuildException be) { |
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throw be; |
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} catch (Exception e) { |
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throw new BuildException(e, getLocation()); |
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} |
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} |
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} |
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/** |
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* A string to wait for from the server. |
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* A subTask <read> tag was found. Create the object, |
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* Save it in our list, and return it. |
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*/ |
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public RExecSubTask createRead() { |
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RExecSubTask task = (RExecSubTask) new RExecRead(); |
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rexecTasks.addElement(task); |
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return task; |
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} |
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/** |
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* Add text to send to the server |
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* A subTask <write> tag was found. Create the object, |
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* Save it in our list, and return it. |
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*/ |
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public RExecSubTask createWrite() { |
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RExecSubTask task = (RExecSubTask) new RExecWrite(); |
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rexecTasks.addElement(task); |
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return task; |
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} |
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/** |
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* Verify that all parameters are included. |
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* Connect and possibly login |
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* Iterate through the list of Reads and writes |
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*/ |
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public void execute() throws BuildException { |
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/** A server name is required to continue */ |
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if (server == null) { |
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throw new BuildException("No Server Specified"); |
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} |
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/** A userid and password must appear together |
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* if they appear. They are not required. |
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*/ |
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if (userid == null && password != null) { |
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throw new BuildException("No Userid Specified"); |
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} |
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if (password == null && userid != null) { |
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throw new BuildException("No Password Specified"); |
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} |
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/** Create the telnet client object */ |
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rexec = new AntRExecClient(); |
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try { |
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rexec.connect(server, port); |
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} catch (IOException e) { |
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throw new BuildException("Can't connect to " + server); |
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} |
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/** Login if userid and password were specified */ |
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if (userid != null && password != null) { |
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login(); |
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} |
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/** Process each sub command */ |
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Enumeration tasksToRun = rexecTasks.elements(); |
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while (tasksToRun != null && tasksToRun.hasMoreElements()) { |
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|
RExecSubTask task = (RExecSubTask) tasksToRun.nextElement(); |
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if (task instanceof RExecRead && defaultTimeout != null) { |
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((RExecRead) task).setDefaultTimeout(defaultTimeout); |
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} |
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task.execute(rexec); |
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} |
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/** Keep reading input stream until end of it or time-out */ |
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|
|
rexec.waitForEOF(defaultTimeout); |
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} |
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|
/** |
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|
|
* Process a 'typical' login. If it differs, use the read |
|
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|
|
* and write tasks explicitely |
|
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|
|
*/ |
|
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|
|
private void login() { |
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|
|
if (addCarriageReturn) { |
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|
|
rexec.sendString("\n", true); |
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|
} |
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|
|
rexec.waitForString("ogin:"); |
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|
|
rexec.sendString(userid, true); |
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|
|
rexec.waitForString("assword:"); |
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|
|
rexec.sendString(password, false); |
|
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|
|
} |
|
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|
|
/** |
|
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|
|
* Set the the comand to execute on the server; |
|
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|
|
*/ |
|
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|
|
public void setCommand(String c) { this.command = c; } |
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|
|
/** |
|
|
|
|
|
* send a carriage return after connecting; optional, defaults to false. |
|
|
|
|
|
*/ |
|
|
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|
|
public void setInitialCR(boolean b) { |
|
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|
|
this.addCarriageReturn = b; |
|
|
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|
|
} |
|
|
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|
|
/** |
|
|
|
|
|
* Set the the login password to use |
|
|
|
|
|
* required if <tt>userid</tt> is set. |
|
|
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|
|
*/ |
|
|
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|
|
public void setPassword(String p) { this.password = p; } |
|
|
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|
|
/** |
|
|
|
|
|
* Set the tcp port to connect to; default is 23. |
|
|
|
|
|
*/ |
|
|
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|
|
public void setPort(int p) { this.port = p; } |
|
|
|
|
|
/** |
|
|
|
|
|
* Set the hostname or address of the remote server. |
|
|
|
|
|
*/ |
|
|
|
|
|
public void setServer(String m) { this.server = m; } |
|
|
|
|
|
/** |
|
|
|
|
|
* set a default timeout in seconds to wait for a response, |
|
|
|
|
|
* zero means forever (the default) |
|
|
|
|
|
*/ |
|
|
|
|
|
public void setTimeout(Integer i) { |
|
|
|
|
|
this.defaultTimeout = i; |
|
|
|
|
|
} |
|
|
|
|
|
/** |
|
|
|
|
|
* Set the the login id to use on the server; |
|
|
|
|
|
* required if <tt>password</tt> is set. |
|
|
|
|
|
*/ |
|
|
|
|
|
public void setUserid(String u) { this.userid = u; } |
|
|
|
|
|
} |
Stefan Bodewig