2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.config.manager.impl.osgi.mapping;
10 import org.apache.commons.io.IOUtils;
11 import org.opendaylight.yangtools.concepts.Registration;
12 import org.opendaylight.yangtools.sal.binding.generator.impl.GeneratedClassLoadingStrategy;
13 import org.opendaylight.yangtools.sal.binding.generator.impl.ModuleInfoBackedContext;
14 import org.opendaylight.yangtools.yang.binding.YangModelBindingProvider;
15 import org.opendaylight.yangtools.yang.binding.YangModuleInfo;
16 import org.osgi.framework.Bundle;
17 import org.osgi.framework.BundleEvent;
18 import org.osgi.util.tracker.BundleTrackerCustomizer;
19 import org.slf4j.Logger;
20 import org.slf4j.LoggerFactory;
22 import java.io.InputStream;
23 import java.lang.reflect.InvocationTargetException;
25 import java.util.Collection;
26 import java.util.LinkedList;
27 import java.util.List;
29 import static java.lang.String.format;
32 * Tracks bundles and attempts to retrieve YangModuleInfo.
34 public final class ModuleInfoBundleTracker implements BundleTrackerCustomizer<Collection<Registration<YangModuleInfo>>> {
36 private static final Logger logger = LoggerFactory.getLogger(ModuleInfoBundleTracker.class);
37 public static final String GET_MODULE_INFO_METHOD = "getModuleInfo";
39 public static final String MODULE_INFO_PROVIDER_PATH_PREFIX = "META-INF/services/";
41 private ModuleInfoBackedContext moduleInfoLoadingStrategy = ModuleInfoBackedContext.create();
43 public GeneratedClassLoadingStrategy getModuleInfoLoadingStrategy() {
44 return moduleInfoLoadingStrategy;
48 public Collection<Registration<YangModuleInfo>> addingBundle(Bundle bundle, BundleEvent event) {
49 URL resource = bundle.getEntry(MODULE_INFO_PROVIDER_PATH_PREFIX + YangModelBindingProvider.class.getName());
55 List<Registration<YangModuleInfo>> registrations = new LinkedList<>();
57 try (InputStream inputStream = resource.openStream()) {
58 List<String> lines = IOUtils.readLines(inputStream);
59 for (String moduleInfoName : lines) {
60 YangModuleInfo moduleInfo = retrieveModuleInfo(moduleInfoName, bundle);
61 registrations.add(moduleInfoLoadingStrategy.registerModuleInfo(moduleInfo));
65 } catch (Exception e) {
66 logger.error("Error while reading {}", resource, e);
67 throw new RuntimeException(e);
74 public void modifiedBundle(Bundle bundle, BundleEvent event, Collection<Registration<YangModuleInfo>> object) {
79 public void removedBundle(Bundle bundle, BundleEvent event, Collection<Registration<YangModuleInfo>> regs) {
84 for (Registration<YangModuleInfo> reg : regs) {
87 } catch (Exception e) {
88 throw new RuntimeException("Unable to unregister YangModuleInfo " + reg.getInstance(), e);
93 private static YangModuleInfo retrieveModuleInfo(String moduleInfoClass, Bundle bundle) {
95 Class<?> clazz = loadClass(moduleInfoClass, bundle);
97 if (YangModelBindingProvider.class.isAssignableFrom(clazz) == false) {
98 errorMessage = logMessage("Class {} does not implement {} in bundle {}", clazz, YangModelBindingProvider.class, bundle);
99 throw new IllegalStateException(errorMessage);
103 Object instance = clazz.newInstance();
104 Object result = clazz.getMethod(GET_MODULE_INFO_METHOD).invoke(instance);
106 if (YangModuleInfo.class.isAssignableFrom(result.getClass()) == false) {
107 errorMessage = logMessage("Error invoking method not found {} in bundle {}, reason {}",
108 GET_MODULE_INFO_METHOD, bundle, "Not assignable from " + YangModuleInfo.class);
110 return (YangModuleInfo) result;
113 } catch (InstantiationException e) {
114 errorMessage = logMessage("Could not instantiate {} in bundle {}, reason {}", moduleInfoClass, bundle, e);
115 } catch (IllegalAccessException e) {
116 errorMessage = logMessage("Illegal access during instatiation of class {} in bundle {}, reason {}",
117 moduleInfoClass, bundle, e);
118 } catch (NoSuchMethodException e) {
119 errorMessage = logMessage("Method not found {} in bundle {}, reason {}", GET_MODULE_INFO_METHOD, bundle, e);
120 } catch (InvocationTargetException e) {
121 errorMessage = logMessage("Error invoking method {} in bundle {}, reason {}", GET_MODULE_INFO_METHOD,
125 throw new IllegalStateException(errorMessage);
128 private static Class<?> loadClass(String moduleInfoClass, Bundle bundle) {
130 return bundle.loadClass(moduleInfoClass);
131 } catch (ClassNotFoundException e) {
132 String errorMessage = logMessage("Could not find class {} in bunde {}, reason {}", moduleInfoClass, bundle, e);
133 throw new IllegalStateException(errorMessage);
137 public static String logMessage(String slfMessage, Object... params) {
138 logger.info(slfMessage, params);
139 String formatMessage = slfMessage.replaceAll("\\{\\}", "%s");
140 return format(formatMessage, params);