io.fabric8.runtime.itests.support.ServiceLocator Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of fabric-runtime-itests-common Show documentation
There is a newer version: 1.1.0.CR2
Show newest version
/**
 *  Copyright 2005-2014 Red Hat, Inc.
 *
 *  Red Hat 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 io.fabric8.runtime.itests.support;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;

import org.jboss.gravia.runtime.Filter;
import org.jboss.gravia.runtime.ModuleContext;
import org.jboss.gravia.runtime.RuntimeLocator;
import org.jboss.gravia.runtime.ServiceReference;
import org.jboss.gravia.runtime.ServiceTracker;
import org.junit.Assert;

public final class ServiceLocator {

	public static final Long DEFAULT_TIMEOUT = 60000L;

	private ServiceLocator() {
		//Utility Class
	}

    public static  T getService(Class type) {
        ModuleContext moduleContext = RuntimeLocator.getRequiredRuntime().getModuleContext();
        ServiceReference sref = moduleContext.getServiceReference(type);
        return sref != null ? moduleContext.getService(sref) : null;
    }

    public static  T getService(ModuleContext moduleContext, Class type) {
        ServiceReference sref = moduleContext.getServiceReference(type);
        return sref != null ? moduleContext.getService(sref) : null;
    }

    public static  T getRequiredService(Class type) {
        T service = getService(RuntimeLocator.getRequiredRuntime().getModuleContext(), type);
        Assert.assertNotNull("Service available: " + type.getName(), service);
        return service;
    }

    public static  T getRequiredService(ModuleContext moduleContext, Class type) {
        T service = getService(moduleContext, type);
        Assert.assertNotNull("Service available: " + type.getName(), service);
        return service;
    }

    public static  T awaitService(Class type) {
        ModuleContext moduleContext = RuntimeLocator.getRequiredRuntime().getModuleContext();
        return awaitService(moduleContext, type, null, DEFAULT_TIMEOUT, TimeUnit.MILLISECONDS);
    }

    public static  T awaitService(ModuleContext moduleContext, Class type) {
        return awaitService(moduleContext, type, null, DEFAULT_TIMEOUT, TimeUnit.MILLISECONDS);
    }

    public static  T awaitService(Class type, String filterspec) {
        ModuleContext moduleContext = RuntimeLocator.getRequiredRuntime().getModuleContext();
        return awaitService(moduleContext, type, filterspec, DEFAULT_TIMEOUT, TimeUnit.MILLISECONDS);
    }

    public static  T awaitService(Class type, String filterspec, long timeout, TimeUnit unit) {
        ModuleContext moduleContext = RuntimeLocator.getRequiredRuntime().getModuleContext();
        return awaitService(moduleContext, type, filterspec, timeout, unit);
    }

    public static  T awaitService(final ModuleContext moduleContext, Class type, String filterspec, long timeout, TimeUnit unit) {

        final CountDownLatch latch = new CountDownLatch(1);
        final AtomicReference serviceRef = new AtomicReference();
        final Filter srvfilter = filterspec != null ? moduleContext.createFilter(filterspec) : null;
        ServiceTracker tracker = new ServiceTracker(moduleContext, type, null) {
            @Override
            public T addingService(ServiceReference sref) {
                T service = super.addingService(sref);
                if (srvfilter == null || srvfilter.match(sref)) {
                    serviceRef.set(moduleContext.getService(sref));
                    latch.countDown();
                }
                return service;
            }
        };
        tracker.open();
        try {
            if (!latch.await(timeout, unit)) {
                throw new RuntimeException("Cannot obtain service: " + srvfilter);
            }
            return serviceRef.get();
        } catch (InterruptedException ex) {
            throw new IllegalStateException();
        } finally {
            tracker.close();
        }
	}
}