/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* 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.
*/
package org.apache.felix.dm.impl.index;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import org.apache.felix.dm.FilterIndex;
import org.apache.felix.dm.impl.Logger;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceEvent;
import org.osgi.framework.ServiceListener;
import org.osgi.framework.ServiceReference;
/**
* @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a>
*/
public class BundleContextInterceptor extends BundleContextInterceptorBase {
protected static final String INDEX_LOG_TRESHOLD = "org.apache.felix.dm.index.log.treshold";
private final ServiceRegistryCache m_cache;
private final boolean m_perfmon = System.getProperty(INDEX_LOG_TRESHOLD) != null;
private Logger m_logger;
private long m_treshold;
public BundleContextInterceptor(ServiceRegistryCache cache, BundleContext context) {
super(context);
m_cache = cache;
if (m_perfmon) {
m_treshold = Long.parseLong(System.getProperty(INDEX_LOG_TRESHOLD));
m_logger = new Logger(context);
}
}
public void addServiceListener(ServiceListener listener, String filter) throws InvalidSyntaxException {
FilterIndex filterIndex = m_cache.hasFilterIndexFor(null, filter);
if (filterIndex != null) {
filterIndex.addServiceListener(listener, filter);
}
else {
// System.out.println("BCI:Listener " + listener.getClass().getName() + " filter " + filter);
m_context.addServiceListener(listener, filter);
}
}
public void addServiceListener(ServiceListener listener) {
FilterIndex filterIndex = m_cache.hasFilterIndexFor(null, null);
if (filterIndex != null) {
filterIndex.addServiceListener(listener, null);
}
else {
// System.out.println("BCI:Listener " + listener.getClass().getName() + " without filter");
m_context.addServiceListener(listener);
}
}
public void removeServiceListener(ServiceListener listener) {
// remove servicelistener. although it would be prettier to find the correct filterindex first it's
// probaby faster to do a brute force removal.
Iterator filterIndexIterator = m_cache.getFilterIndices().iterator();
while (filterIndexIterator.hasNext()) {
((FilterIndex) filterIndexIterator.next()).removeServiceListener(listener);
}
m_context.removeServiceListener(listener);
}
public ServiceReference[] getServiceReferences(String clazz, String filter) throws InvalidSyntaxException {
long start = 0L;
if (m_perfmon) {
start = System.currentTimeMillis();
}
// first we ask the cache if there is an index for our request (class and filter combination)
FilterIndex filterIndex = m_cache.hasFilterIndexFor(clazz, filter);
if (filterIndex != null) {
List /* <ServiceReference> */ result = filterIndex.getAllServiceReferences(clazz, filter);
Iterator iterator = result.iterator();
while (iterator.hasNext()) {
ServiceReference reference = (ServiceReference) iterator.next();
String[] list = (String[]) reference.getProperty(Constants.OBJECTCLASS);
for (int i = 0; i < list.length; i++) {
if (!reference.isAssignableTo(m_context.getBundle(), list[i])) {
iterator.remove();
break;
}
}
}
if (m_perfmon) {
long duration = System.currentTimeMillis() - start;
if (duration > m_treshold) {
m_logger.log(org.apache.felix.dm.impl.Logger.LOG_DEBUG, "Indexed filter exceeds lookup time treshold (" + duration + "ms.): " + clazz + " " + filter);
}
}
if (result == null || result.size() == 0) {
return null;
}
return (ServiceReference[]) result.toArray(new ServiceReference[result.size()]);
}
else {
// if they don't know, we ask the real bundle context instead
ServiceReference[] serviceReferences = m_context.getServiceReferences(clazz, filter);
if (m_perfmon) {
long duration = System.currentTimeMillis() - start;
if (duration > m_treshold) {
m_logger.log(org.apache.felix.dm.impl.Logger.LOG_DEBUG, "Unindexed filter exceeds lookup time treshold (" + duration + "ms.): " + clazz + " " + filter);
}
}
return serviceReferences;
}
}
public ServiceReference[] getAllServiceReferences(String clazz, String filter) throws InvalidSyntaxException {
// first we ask the cache if there is an index for our request (class and filter combination)
FilterIndex filterIndex = m_cache.hasFilterIndexFor(clazz, filter);
if (filterIndex != null) {
List /* <ServiceReference> */ result = filterIndex.getAllServiceReferences(clazz, filter);
if (result == null || result.size() == 0) {
return null;
}
return (ServiceReference[]) result.toArray(new ServiceReference[result.size()]);
}
else {
// if they don't know, we ask the real bundle context instead
return m_context.getAllServiceReferences(clazz, filter);
}
}
public ServiceReference getServiceReference(String clazz) {
ServiceReference[] references;
try {
references = getServiceReferences(clazz, null);
if (references == null || references.length == 0) {
return null;
}
Arrays.sort(references);
return references[references.length - 1];
}
catch (InvalidSyntaxException e) {
throw new Error("Invalid filter syntax thrown for null filter.", e);
}
}
public void serviceChanged(ServiceEvent event) {
m_cache.serviceChangedForFilterIndices(event);
}
}