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* Licensed to the Apache Software Foundation (ASF) under one
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* 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.
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package org.apache.felix.dm.test.integration.api;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import junit.framework.Assert;
import org.apache.felix.dm.DependencyManager;
import org.apache.felix.dm.ResourceHandler;
import org.apache.felix.dm.ResourceUtil;
import org.apache.felix.dm.test.components.Ensure;
import org.apache.felix.dm.test.integration.common.TestBase;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.ops4j.pax.exam.junit.PaxExam;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Filter;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
@RunWith(PaxExam.class)
public class ResourceAdapterTest extends TestBase {
@Test
public void testBasicResourceAdapter() throws Exception {
DependencyManager m = new DependencyManager(context);
// helper class that ensures certain steps get executed in sequence
Ensure e = new Ensure();
// create a resource provider
ResourceProvider provider = new ResourceProvider(e);
// activate it
m.add(m.createComponent().setImplementation(provider).add(m.createServiceDependency().setService(ResourceHandler.class).setCallbacks("add", "remove")));
// create a resource adapter for our single resource
// note that we can provide an actual implementation instance here because there will be only one
// adapter, normally you'd want to specify a Class here
m.add(m.createResourceAdapterService("(&(path=/path/to/*.txt)(host=localhost))", false, null, "changed")
.setImplementation(new ResourceAdapter(e)));
// wait until the single resource is available
e.waitForStep(3, 5000);
// trigger a 'change' in our resource
provider.change();
// wait until the changed callback is invoked
e.waitForStep(4, 5000);
m.clear();
}
static class ResourceAdapter {
protected URL m_resource; // injected by reflection.
private Ensure m_ensure;
ResourceAdapter(Ensure e) {
m_ensure = e;
}
public void start() {
m_ensure.step(1);
Assert.assertNotNull("resource not injected", m_resource);
m_ensure.step(2);
try {
InputStream in = m_resource.openStream();
}
catch (FileNotFoundException e) {
m_ensure.step(3);
}
catch (IOException e) {
Assert.fail("We should not have gotten this exception.");
}
}
public void changed() {
m_ensure.step(4);
}
}
static class ResourceProvider {
private volatile BundleContext m_context;
private final Ensure m_ensure;
private final Map m_handlers = new HashMap();
private URL[] m_resources;
public ResourceProvider(Ensure ensure) throws MalformedURLException {
m_ensure = ensure;
m_resources = new URL[] {
new URL("file://localhost/path/to/file1.txt")
};
}
public void change() {
ResourceHandler[] handlers;
synchronized (m_handlers) {
handlers = (ResourceHandler[]) m_handlers.keySet().toArray(new ResourceHandler[m_handlers.size()]);
}
for (int i = 0; i < m_resources.length; i++) {
for (int j = 0; j < handlers.length; j++) {
ResourceHandler handler = handlers[j];
handler.changed(m_resources[i]);
}
}
}
public void add(ServiceReference ref, ResourceHandler handler) {
String filterString = (String) ref.getProperty("filter");
Filter filter = null;
if (filterString != null) {
try {
filter = m_context.createFilter(filterString);
}
catch (InvalidSyntaxException e) {
Assert.fail("Could not create filter for resource handler: " + e);
return;
}
}
synchronized (m_handlers) {
m_handlers.put(handler, filter);
}
for (int i = 0; i < m_resources.length; i++) {
if (filter == null || filter.match(ResourceUtil.createProperties(m_resources[i]))) {
handler.added(m_resources[i]);
}
}
}
public void remove(ServiceReference ref, ResourceHandler handler) {
Filter filter;
synchronized (m_handlers) {
filter = (Filter) m_handlers.remove(handler);
}
removeResources(handler, filter);
}
private void removeResources(ResourceHandler handler, Filter filter) {
for (int i = 0; i < m_resources.length; i++) {
if (filter == null || filter.match(ResourceUtil.createProperties(m_resources[i]))) {
handler.removed(m_resources[i]);
}
}
}
public void destroy() {
Entry[] handlers;
synchronized (m_handlers) {
handlers = (Entry[]) m_handlers.entrySet().toArray(new Entry[m_handlers.size()]);
}
for (int i = 0; i < handlers.length; i++) {
removeResources((ResourceHandler) handlers[i].getKey(), (Filter) handlers[i].getValue());
}
System.out.println("DESTROY..." + m_handlers.size());
}
}
}