com.liferay.osgi.util.service.OSGiServiceUtil Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
package com.liferay.osgi.util.service;
import com.liferay.petra.function.UnsafeFunction;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
/**
* @author Shuyang Zhou
*/
public class OSGiServiceUtil {
public static R callService(
BundleContext bundleContext, Class serviceClass,
UnsafeFunction unsafeFunction)
throws E {
ServiceReference serviceReference =
bundleContext.getServiceReference(serviceClass);
if (serviceReference == null) {
return unsafeFunction.apply(null);
}
S service = bundleContext.getService(serviceReference);
try {
return unsafeFunction.apply(service);
}
finally {
bundleContext.ungetService(serviceReference);
}
}
}