org.apache.tools.ant.taskdefs.condition.Socket Maven / Gradle / Ivy
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* 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.io.IOException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.ProjectComponent;
/**
* Condition to wait for a TCP/IP socket to have a listener. Its attributes are:
* server - the name of the server.
* port - the port number of the socket.
*
* @since Ant 1.5
*/
public class Socket extends ProjectComponent implements Condition {
private String server = null;
private int port = 0;
/**
* Set the server attribute
*
* @param server the server name
*/
public void setServer(String server) {
this.server = server;
}
/**
* Set the port attribute
*
* @param port the port number of the socket
*/
public void setPort(int port) {
this.port = port;
}
/**
* @return true if a socket can be created
* @exception BuildException if the attributes are not set
*/
public boolean eval() throws BuildException {
if (server == null) {
throw new BuildException("No server specified in socket "
+ "condition");
}
if (port == 0) {
throw new BuildException("No port specified in socket condition");
}
log("Checking for listener at " + server + ":" + port,
Project.MSG_VERBOSE);
java.net.Socket s = null;
try {
s = new java.net.Socket(server, port);
} catch (IOException e) {
return false;
} finally {
if (s != null) {
try {
s.close();
} catch (IOException ioe) {
// Intentionally left blank
}
}
}
return true;
}
}