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/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* Licensed 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. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.internal;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
/**
* This class is an Ant task for selecting a random available port
* on through which a socket or JGroups channel may be established.
* To use this task in a build file, you must set up a
* taskdef such as:
*
*
* <taskdef name="available-port"
* classname="com.gemstone.gemfire.internal.AvailablePortTask"
* classpath="${gemfire.home}/lib/gemfire.jar" />
*
*
*
*
* Available Port
*
* Description
*
* Uses the {@link AvailablePort} class to find an available port
* on which a socket or JGroups channel may be created. The port
* number is assigned into an Ant property.
*
* Parameters
*
*
*
* Attribute
* Description
* Required
*
*
* protocol
* The networking protocol for the desired port
* (either socket or jgroups
* Yes
*
*
* portProperty
* The system property whose value will be set to
* the available port number.
* Yes
*
*
*
* Examples
*
*
* <available-port protocol="jgroups"
* portProperty="multicast.port"/>
*
*
* searches for an available port on which to connect to JGroups
*
* @see AvailablePort
*
* @author David Whitlock
*
*/
public class AvailablePortTask extends Task {
private String protocolString = null;
private String property = null;
/////////////////////// Instance Methods ///////////////////////
/**
* Executes this task. Checks to make sure the protocol and port
* property have been set. The just invokes {@link AvailablePort}
* appropriately.
*/
@Override
public void execute() throws BuildException {
Project proj = this.getProject();
int protocol;
if (protocolString == null) {
throw new BuildException(LocalizedStrings.AvailablePortTask_MISSING_PROTOCOL.toLocalizedString());
} else if (protocolString.equalsIgnoreCase("JGROUPS")) {
protocol = AvailablePort.JGROUPS;
} else if (protocolString.equalsIgnoreCase("SOCKET")) {
protocol = AvailablePort.SOCKET;
} else {
throw new BuildException(LocalizedStrings.AvailablePortTask_UNKNOWN_PROTOCOL_0.toLocalizedString(protocolString));
}
if (property == null) {
throw new BuildException(LocalizedStrings.AvailablePortTask_MISSING_PORT_PROPERTY.toLocalizedString());
}
// Because the XML parsing code relies on the fact that certain
// configuration files can be located from the current context
// loader, we set the context class loader to be the class loader
// with all of the GemFire classes on it.
ClassLoader oldCl =
Thread.currentThread().getContextClassLoader();
ClassLoader cl = this.getClass().getClassLoader();
Thread.currentThread().setContextClassLoader(cl);
try {
int port = AvailablePort.getRandomAvailablePort(protocol);
proj.setProperty(property, String.valueOf(port));
} finally {
Thread.currentThread().setContextClassLoader(oldCl);
}
}
public void setPortproperty(String property) {
this.property = property;
}
public void setProtocol(String protocol) {
this.protocolString = protocol;
}
}