hudson.remoting.PreloadJarTask Maven / Gradle / Ivy
/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.remoting;
import java.io.IOException;
import java.net.URL;
/**
* {@link Callable} used to deliver a jar file to {@link RemoteClassLoader}.
*
* @author Kohsuke Kawaguchi
*/
final class PreloadJarTask implements DelegatingCallable {
/**
* Jar file to be preloaded.
*/
private final URL[] jars;
private transient ClassLoader target;
PreloadJarTask(URL[] jars, ClassLoader target) {
this.jars = jars;
this.target = target;
}
public ClassLoader getClassLoader() {
return target;
}
public Boolean call() throws IOException {
ClassLoader cl = Thread.currentThread().getContextClassLoader();
if (!(cl instanceof RemoteClassLoader))
return false;
RemoteClassLoader rcl = (RemoteClassLoader) cl;
boolean r = false;
for (URL jar : jars)
r |= rcl.prefetch(jar);
return r;
}
}