/**
* 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.camel.core.osgi;
import org.apache.camel.CamelContext;
import org.apache.camel.Component;
import org.apache.camel.spi.ComponentResolver;
import org.apache.camel.util.CamelContextHelper;
import org.apache.camel.util.ObjectHelper;
import org.osgi.framework.BundleContext;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class OsgiComponentResolver implements ComponentResolver {
private static final transient Logger LOG = LoggerFactory.getLogger(OsgiComponentResolver.class);
private final BundleContext bundleContext;
public OsgiComponentResolver(BundleContext bundleContext) {
this.bundleContext = bundleContext;
}
public Component resolveComponent(String name, CamelContext context) throws Exception {
Object bean = null;
try {
bean = context.getRegistry().lookup(name);
if (bean != null) {
LOG.debug("Found component: {} in registry: {}", name, bean);
}
} catch (Exception e) {
LOG.debug("Ignored error looking up bean: " + name + ". Error: " + e);
}
if (bean != null) {
if (bean instanceof Component) {
return (Component)bean;
} else {
// lets use Camel's type conversion mechanism to convert things like CamelContext
// and other types into a valid Component
Component component = CamelContextHelper.convertTo(context, Component.class, bean);
if (component != null) {
return component;
}
}
}
// Check in OSGi bundles
return getComponent(name, context);
}
protected Component getComponent(String name, CamelContext context) throws Exception {
LOG.trace("Finding Component: {}", name);
try {
ServiceReference[] refs = bundleContext.getServiceReferences(ComponentResolver.class.getName(), "(component=" + name + ")");
if (refs != null) {
for (ServiceReference ref : refs) {
Object service = bundleContext.getService(ref);
if (ComponentResolver.class.isAssignableFrom(service.getClass())) {
ComponentResolver resolver = (ComponentResolver) service;
return resolver.resolveComponent(name, context);
}
}
}
return null;
} catch (InvalidSyntaxException e) {
throw ObjectHelper.wrapRuntimeCamelException(e);
}
}
}