opendaylight/config/config-manager/src/main/java/org/opendaylight/controller/config/manager/impl/ConfigRegistryImpl.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.controller.config.manager.impl;
   9
  10 import com.google.common.collect.Maps;
  11 import org.opendaylight.controller.config.api.ConflictingVersionException;
  12 import org.opendaylight.controller.config.api.ModuleIdentifier;
  13 import org.opendaylight.controller.config.api.RuntimeBeanRegistratorAwareModule;
  14 import org.opendaylight.controller.config.api.ValidationException;
  15 import org.opendaylight.controller.config.api.annotations.ServiceInterfaceAnnotation;
  16 import org.opendaylight.controller.config.api.jmx.CommitStatus;
  17 import org.opendaylight.controller.config.api.jmx.ObjectNameUtil;
  18 import org.opendaylight.controller.config.manager.impl.dependencyresolver.DestroyedModule;
  19 import org.opendaylight.controller.config.manager.impl.dependencyresolver.ModuleInternalTransactionalInfo;
  20 import org.opendaylight.controller.config.manager.impl.dynamicmbean.DynamicReadableWrapper;
  21 import org.opendaylight.controller.config.manager.impl.factoriesresolver.HierarchicalConfigMBeanFactoriesHolder;
  22 import org.opendaylight.controller.config.manager.impl.factoriesresolver.ModuleFactoriesResolver;
  23 import org.opendaylight.controller.config.manager.impl.jmx.BaseJMXRegistrator;
  24 import org.opendaylight.controller.config.manager.impl.jmx.ModuleJMXRegistrator;
  25 import org.opendaylight.controller.config.manager.impl.jmx.RootRuntimeBeanRegistratorImpl;
  26 import org.opendaylight.controller.config.manager.impl.jmx.TransactionJMXRegistrator;
  27 import org.opendaylight.controller.config.manager.impl.osgi.BeanToOsgiServiceManager;
  28 import org.opendaylight.controller.config.manager.impl.osgi.BeanToOsgiServiceManager.OsgiRegistration;
  29 import org.opendaylight.controller.config.manager.impl.util.LookupBeansUtil;
  30 import org.opendaylight.controller.config.manager.impl.util.ModuleQNameUtil;
  31 import org.opendaylight.controller.config.spi.Module;
  32 import org.opendaylight.controller.config.spi.ModuleFactory;
  33 import org.opendaylight.yangtools.yang.data.impl.codec.CodecRegistry;
  34 import org.osgi.framework.BundleContext;
  35 import org.slf4j.Logger;
  36 import org.slf4j.LoggerFactory;
  37
  38 import javax.annotation.concurrent.GuardedBy;
  39 import javax.annotation.concurrent.NotThreadSafe;
  40 import javax.annotation.concurrent.ThreadSafe;
  41 import javax.management.InstanceAlreadyExistsException;
  42 import javax.management.InstanceNotFoundException;
  43 import javax.management.MBeanServer;
  44 import javax.management.MBeanServerFactory;
  45 import javax.management.ObjectName;
  46 import java.util.ArrayList;
  47 import java.util.Collection;
  48 import java.util.Collections;
  49 import java.util.HashMap;
  50 import java.util.Iterator;
  51 import java.util.LinkedList;
  52 import java.util.List;
  53 import java.util.Map;
  54 import java.util.Map.Entry;
  55 import java.util.Set;
  56
  57 /**
  58  * Singleton that is responsible for creating and committing Config
  59  * Transactions. It is registered in Platform MBean Server.
  60  */
  61 @ThreadSafe
  62 public class ConfigRegistryImpl implements AutoCloseable, ConfigRegistryImplMXBean {
  63     private static final Logger logger = LoggerFactory.getLogger(ConfigRegistryImpl.class);
  64
  65     private final ModuleFactoriesResolver resolver;
  66     private final MBeanServer configMBeanServer;
  67     private final CodecRegistry codecRegistry;
  68
  69     @GuardedBy("this")
  70     private long version = 0;
  71     @GuardedBy("this")
  72     private long versionCounter = 0;
  73
  74     /**
  75      * Contains current configuration in form of {moduleName:{instanceName,read
  76      * only module}} for copying state to new transaction. Each running module
  77      * is present just once, no matter how many interfaces it exposes.
  78      */
  79     @GuardedBy("this")
  80     private final ConfigHolder currentConfig = new ConfigHolder();
  81
  82     /**
  83      * Will return true unless there was a transaction that succeeded during
  84      * validation but failed in second phase of commit. In this case the server
  85      * is unstable and its state is undefined.
  86      */
  87     @GuardedBy("this")
  88     private boolean isHealthy = true;
  89
  90     /**
  91      * Holds Map<transactionName, transactionController> and purges it each time
  92      * its content is requested.
  93      */
  94     @GuardedBy("this")
  95     private final TransactionsHolder transactionsHolder = new TransactionsHolder();
  96
  97     private final BaseJMXRegistrator baseJMXRegistrator;
  98
  99     private final BeanToOsgiServiceManager beanToOsgiServiceManager;
 100
 101     // internal jmx server for read only beans
 102     private final MBeanServer registryMBeanServer;
 103     // internal jmx server shared by all transactions
 104     private final MBeanServer transactionsMBeanServer;
 105
 106     // Used for finding new factory instances for default module functionality
 107     @GuardedBy("this")
 108     private List<ModuleFactory> lastListOfFactories = Collections.emptyList();
 109
 110     @GuardedBy("this") // switched in every 2ndPC
 111     private CloseableServiceReferenceReadableRegistry readableSRRegistry = ServiceReferenceRegistryImpl.createInitialSRLookupRegistry();
 112
 113     // constructor
 114     public ConfigRegistryImpl(ModuleFactoriesResolver resolver,
 115                               MBeanServer configMBeanServer, CodecRegistry codecRegistry) {
 116         this(resolver, configMBeanServer,
 117                 new BaseJMXRegistrator(configMBeanServer), codecRegistry);
 118     }
 119
 120     // constructor
 121     public ConfigRegistryImpl(ModuleFactoriesResolver resolver,
 122                               MBeanServer configMBeanServer,
 123                               BaseJMXRegistrator baseJMXRegistrator, CodecRegistry codecRegistry) {
 124         this.resolver = resolver;
 125         this.beanToOsgiServiceManager = new BeanToOsgiServiceManager();
 126         this.configMBeanServer = configMBeanServer;
 127         this.baseJMXRegistrator = baseJMXRegistrator;
 128         this.codecRegistry = codecRegistry;
 129         this.registryMBeanServer = MBeanServerFactory
 130                 .createMBeanServer("ConfigRegistry" + configMBeanServer.getDefaultDomain());
 131         this.transactionsMBeanServer = MBeanServerFactory
 132                 .createMBeanServer("ConfigTransactions" + configMBeanServer.getDefaultDomain());
 133     }
 134
 135     /**
 136      * Create new {@link ConfigTransactionControllerImpl }
 137      */
 138     @Override
 139     public synchronized ObjectName beginConfig() {
 140         return beginConfig(false);
 141     }
 142
 143     /**
 144      * @param blankTransaction true if this transaction is created automatically by
 145      *                         org.opendaylight.controller.config.manager.impl.osgi.BlankTransactionServiceTracker
 146      */
 147     public synchronized ObjectName beginConfig(boolean blankTransaction) {
 148         return beginConfigInternal(blankTransaction).getControllerObjectName();
 149     }
 150
 151     private synchronized ConfigTransactionControllerInternal beginConfigInternal(boolean blankTransaction) {
 152         versionCounter++;
 153         final String transactionName = "ConfigTransaction-" + version + "-" + versionCounter;
 154
 155         TransactionJMXRegistratorFactory factory = new TransactionJMXRegistratorFactory() {
 156             @Override
 157             public TransactionJMXRegistrator create() {
 158                 return baseJMXRegistrator.createTransactionJMXRegistrator(transactionName);
 159             }
 160         };
 161
 162         Map<String, Map.Entry<ModuleFactory, BundleContext>> allCurrentFactories = Collections.unmodifiableMap(
 163                 resolver.getAllFactories());
 164
 165         // closed by transaction controller
 166         ConfigTransactionLookupRegistry txLookupRegistry = new ConfigTransactionLookupRegistry(new TransactionIdentifier(
 167                 transactionName), factory, allCurrentFactories);
 168         SearchableServiceReferenceWritableRegistry writableRegistry = ServiceReferenceRegistryImpl.createSRWritableRegistry(
 169                 readableSRRegistry, txLookupRegistry, allCurrentFactories);
 170
 171         ConfigTransactionControllerInternal transactionController = new ConfigTransactionControllerImpl(
 172                 txLookupRegistry, version, codecRegistry,
 173                 versionCounter, allCurrentFactories, transactionsMBeanServer,
 174                 configMBeanServer, blankTransaction, writableRegistry);
 175         try {
 176             txLookupRegistry.registerMBean(transactionController, transactionController.getControllerObjectName());
 177         } catch (InstanceAlreadyExistsException e) {
 178             throw new IllegalStateException(e);
 179         }
 180         transactionController.copyExistingModulesAndProcessFactoryDiff(currentConfig.getEntries(), lastListOfFactories);
 181         transactionsHolder.add(transactionName, transactionController, txLookupRegistry);
 182         return transactionController;
 183     }
 184
 185     /**
 186      * {@inheritDoc}
 187      */
 188     @Override
 189     @SuppressWarnings("PMD.AvoidCatchingThrowable")
 190     public synchronized CommitStatus commitConfig(ObjectName transactionControllerON)
 191             throws ConflictingVersionException, ValidationException {
 192         final String transactionName = ObjectNameUtil
 193                 .getTransactionName(transactionControllerON);
 194         logger.trace("About to commit {}. Current parentVersion: {}, versionCounter {}", transactionName, version, versionCounter);
 195
 196         // find ConfigTransactionController
 197         Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = transactionsHolder.getCurrentTransactions();
 198         Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry> configTransactionControllerEntry = transactions.get(transactionName);
 199         if (configTransactionControllerEntry == null) {
 200             throw new IllegalArgumentException(String.format(
 201                     "Transaction with name '%s' not found", transactionName));
 202         }
 203         ConfigTransactionControllerInternal configTransactionController = configTransactionControllerEntry.getKey();
 204         // check optimistic lock
 205         if (version != configTransactionController.getParentVersion()) {
 206             throw new ConflictingVersionException(
 207                     String.format(
 208                             "Optimistic lock failed. Expected parent version %d, was %d",
 209                             version,
 210                             configTransactionController.getParentVersion()));
 211         }
 212         // optimistic lock ok
 213
 214         CommitInfo commitInfo = configTransactionController.validateBeforeCommitAndLockTransaction();
 215         lastListOfFactories = Collections.unmodifiableList(configTransactionController.getCurrentlyRegisteredFactories());
 216         // non recoverable from here:
 217         try {
 218             return secondPhaseCommit(configTransactionController, commitInfo, configTransactionControllerEntry.getValue());
 219         } catch (Throwable t) { // some libs throw Errors: e.g.
 220             // javax.xml.ws.spi.FactoryFinder$ConfigurationError
 221             isHealthy = false;
 222             logger.error("Configuration Transaction failed on 2PC, server is unhealthy", t);
 223             if (t instanceof RuntimeException) {
 224                 throw (RuntimeException) t;
 225             } else if (t instanceof Error) {
 226                 throw (Error) t;
 227             } else {
 228                 throw new RuntimeException(t);
 229             }
 230         }
 231     }
 232
 233     private CommitStatus secondPhaseCommit(ConfigTransactionControllerInternal configTransactionController,
 234                                            CommitInfo commitInfo, ConfigTransactionLookupRegistry txLookupRegistry) {
 235
 236         // close instances which were destroyed by the user, including
 237         // (hopefully) runtime beans
 238         for (DestroyedModule toBeDestroyed : commitInfo
 239                 .getDestroyedFromPreviousTransactions()) {
 240             toBeDestroyed.close(); // closes instance (which should close
 241             // runtime jmx registrator),
 242             // also closes osgi registration and ModuleJMXRegistrator
 243             // registration
 244             currentConfig.remove(toBeDestroyed.getIdentifier());
 245         }
 246
 247         // set RuntimeBeanRegistrators on beans implementing
 248         // RuntimeBeanRegistratorAwareModule, each module
 249         // should have exactly one runtime jmx registrator.
 250         Map<ModuleIdentifier, RootRuntimeBeanRegistratorImpl> runtimeRegistrators = new HashMap<>();
 251         for (ModuleInternalTransactionalInfo entry : commitInfo.getCommitted()
 252                 .values()) {
 253             RootRuntimeBeanRegistratorImpl runtimeBeanRegistrator;
 254             if (entry.hasOldModule() == false) {
 255                 runtimeBeanRegistrator = baseJMXRegistrator
 256                         .createRuntimeBeanRegistrator(entry.getIdentifier());
 257             } else {
 258                 // reuse old JMX registrator
 259                 runtimeBeanRegistrator = entry.getOldInternalInfo()
 260                         .getRuntimeBeanRegistrator();
 261             }
 262             // set runtime jmx registrator if required
 263             Module module = entry.getProxiedModule();
 264             if (module instanceof RuntimeBeanRegistratorAwareModule) {
 265                 ((RuntimeBeanRegistratorAwareModule) module)
 266                         .setRuntimeBeanRegistrator(runtimeBeanRegistrator);
 267             }
 268             // save it to info so it is accessible afterwards
 269             runtimeRegistrators.put(entry.getIdentifier(), runtimeBeanRegistrator);
 270         }
 271
 272         // can register runtime beans
 273         List<ModuleIdentifier> orderedModuleIdentifiers = configTransactionController.secondPhaseCommit();
 274         txLookupRegistry.close();
 275         configTransactionController.close();
 276
 277         // copy configuration to read only mode
 278         List<ObjectName> newInstances = new LinkedList<>();
 279         List<ObjectName> reusedInstances = new LinkedList<>();
 280         List<ObjectName> recreatedInstances = new LinkedList<>();
 281
 282         Map<Module, ModuleInternalInfo> newConfigEntries = new HashMap<>();
 283
 284         int orderingIdx = 0;
 285         for (ModuleIdentifier moduleIdentifier : orderedModuleIdentifiers) {
 286             logger.trace("Registering {}", moduleIdentifier);
 287             ModuleInternalTransactionalInfo entry = commitInfo.getCommitted()
 288                     .get(moduleIdentifier);
 289             if (entry == null) {
 290                 throw new NullPointerException("Module not found "
 291                         + moduleIdentifier);
 292             }
 293
 294             ObjectName primaryReadOnlyON = ObjectNameUtil
 295                     .createReadOnlyModuleON(moduleIdentifier);
 296
 297             // determine if current instance was recreated or reused or is new
 298
 299             // rules for closing resources:
 300             // osgi registration - will be reused if possible.
 301             // module jmx registration - will be (re)created every time, needs
 302             // to be closed here
 303             // runtime jmx registration - should be taken care of by module
 304             // itself
 305             // instance - is closed only if it was destroyed
 306             ModuleJMXRegistrator newModuleJMXRegistrator = baseJMXRegistrator
 307                     .createModuleJMXRegistrator();
 308
 309             OsgiRegistration osgiRegistration = null;
 310             AutoCloseable instance = entry.getProxiedModule().getInstance();
 311             if (entry.hasOldModule()) {
 312                 ModuleInternalInfo oldInternalInfo = entry.getOldInternalInfo();
 313                 DynamicReadableWrapper oldReadableConfigBean = oldInternalInfo.getReadableModule();
 314                 currentConfig.remove(entry.getIdentifier());
 315
 316                 // test if old instance == new instance
 317                 if (oldReadableConfigBean.getInstance().equals(instance)) {
 318                     // reused old instance:
 319                     // wrap in readable dynamic mbean
 320                     reusedInstances.add(primaryReadOnlyON);
 321                     osgiRegistration = oldInternalInfo.getOsgiRegistration();
 322                 } else {
 323                     // recreated instance:
 324                     // it is responsibility of module to call the old instance -
 325                     // we just need to unregister configbean
 326                     recreatedInstances.add(primaryReadOnlyON);
 327
 328                     // close old osgi registration
 329                     oldInternalInfo.getOsgiRegistration().close();
 330                 }
 331
 332                 // close old module jmx registrator
 333                 oldInternalInfo.getModuleJMXRegistrator().close();
 334             } else {
 335                 // new instance:
 336                 // wrap in readable dynamic mbean
 337                 newInstances.add(primaryReadOnlyON);
 338             }
 339             Module realModule = entry.getRealModule();
 340
 341             DynamicReadableWrapper newReadableConfigBean = new DynamicReadableWrapper(
 342                     realModule, instance, moduleIdentifier,
 343                     registryMBeanServer, configMBeanServer);
 344
 345             // register to JMX
 346             try {
 347                 newModuleJMXRegistrator.registerMBean(newReadableConfigBean, primaryReadOnlyON);
 348             } catch (InstanceAlreadyExistsException e) {
 349                 throw new IllegalStateException("Possible code error, already registered:" + primaryReadOnlyON,e);
 350             }
 351
 352             // register services to OSGi
 353             Map<String, ServiceInterfaceAnnotation> annotationMapping = configTransactionController.getWritableRegistry().findServiceInterfaces(moduleIdentifier);
 354             BundleContext bc = configTransactionController.getModuleFactoryBundleContext(
 355                     entry.getModuleFactory().getImplementationName());
 356             if (osgiRegistration == null) {
 357                 osgiRegistration = beanToOsgiServiceManager.registerToOsgi(
 358                         newReadableConfigBean.getInstance(), moduleIdentifier, bc, annotationMapping);
 359             } else {
 360                 osgiRegistration.updateRegistrations(annotationMapping, bc, instance);
 361             }
 362
 363             RootRuntimeBeanRegistratorImpl runtimeBeanRegistrator = runtimeRegistrators
 364                     .get(entry.getIdentifier());
 365             ModuleInternalInfo newInfo = new ModuleInternalInfo(
 366                     entry.getIdentifier(), newReadableConfigBean, osgiRegistration,
 367                     runtimeBeanRegistrator, newModuleJMXRegistrator,
 368                     orderingIdx, entry.isDefaultBean());
 369
 370             newConfigEntries.put(realModule, newInfo);
 371             orderingIdx++;
 372         }
 373         currentConfig.addAll(newConfigEntries.values());
 374
 375         // update version
 376         version = configTransactionController.getVersion();
 377
 378         // switch readable Service Reference Registry
 379         this.readableSRRegistry.close();
 380         this.readableSRRegistry = ServiceReferenceRegistryImpl.createSRReadableRegistry(
 381                 configTransactionController.getWritableRegistry(), this, baseJMXRegistrator);
 382
 383         return new CommitStatus(newInstances, reusedInstances,
 384                 recreatedInstances);
 385     }
 386
 387     /**
 388      * {@inheritDoc}
 389      */
 390     @Override
 391     public synchronized List<ObjectName> getOpenConfigs() {
 392         Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = transactionsHolder
 393                 .getCurrentTransactions();
 394         List<ObjectName> result = new ArrayList<>(transactions.size());
 395         for (Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry> configTransactionControllerEntry : transactions
 396                 .values()) {
 397             result.add(configTransactionControllerEntry.getKey().getControllerObjectName());
 398         }
 399         return result;
 400     }
 401
 402     /**
 403      * Abort open transactions and unregister read only modules. Since this
 404      * class is not responsible for registering itself under
 405      * {@link org.opendaylight.controller.config.api.ConfigRegistry#OBJECT_NAME}, it will not unregister itself
 406      * here.
 407      */
 408     @Override
 409     public synchronized void close() {
 410         // abort transactions
 411         Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = transactionsHolder
 412                 .getCurrentTransactions();
 413         for (Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry> configTransactionControllerEntry : transactions
 414                 .values()) {
 415
 416             ConfigTransactionControllerInternal configTransactionController = configTransactionControllerEntry.getKey();
 417             try {
 418                 configTransactionControllerEntry.getValue().close();
 419                 configTransactionController.abortConfig();
 420             } catch (RuntimeException e) {
 421                 logger.warn("Ignoring exception while aborting {}",
 422                         configTransactionController, e);
 423             }
 424         }
 425
 426         // destroy all live objects one after another in order of the dependency
 427         // hierarchy
 428         List<DestroyedModule> destroyedModules = currentConfig
 429                 .getModulesToBeDestroyed();
 430         for (DestroyedModule destroyedModule : destroyedModules) {
 431             destroyedModule.close();
 432         }
 433         // unregister MBeans that failed to unregister properly
 434         baseJMXRegistrator.close();
 435         // remove jmx servers
 436         MBeanServerFactory.releaseMBeanServer(registryMBeanServer);
 437         MBeanServerFactory.releaseMBeanServer(transactionsMBeanServer);
 438
 439     }
 440
 441     /**
 442      * {@inheritDoc}
 443      */
 444     @Override
 445     public long getVersion() {
 446         return version;
 447     }
 448
 449     /**
 450      * {@inheritDoc}
 451      */
 452     @Override
 453     public Set<String> getAvailableModuleNames() {
 454         return new HierarchicalConfigMBeanFactoriesHolder(
 455                 resolver.getAllFactories()).getModuleNames();
 456     }
 457
 458     /**
 459      * {@inheritDoc}
 460      */
 461     @Override
 462     public boolean isHealthy() {
 463         return isHealthy;
 464     }
 465
 466     // filtering methods
 467
 468     /**
 469      * {@inheritDoc}
 470      */
 471     @Override
 472     public Set<ObjectName> lookupConfigBeans() {
 473         return lookupConfigBeans("*", "*");
 474     }
 475
 476     /**
 477      * {@inheritDoc}
 478      */
 479     @Override
 480     public Set<ObjectName> lookupConfigBeans(String moduleName) {
 481         return lookupConfigBeans(moduleName, "*");
 482     }
 483
 484     /**
 485      * {@inheritDoc}
 486      */
 487     @Override
 488     public ObjectName lookupConfigBean(String moduleName, String instanceName)
 489             throws InstanceNotFoundException {
 490         return LookupBeansUtil.lookupConfigBean(this, moduleName, instanceName);
 491     }
 492
 493     /**
 494      * {@inheritDoc}
 495      */
 496     @Override
 497     public Set<ObjectName> lookupConfigBeans(String moduleName,
 498                                              String instanceName) {
 499         ObjectName namePattern = ObjectNameUtil.createModulePattern(moduleName,
 500                 instanceName);
 501         return baseJMXRegistrator.queryNames(namePattern, null);
 502     }
 503
 504     /**
 505      * {@inheritDoc}
 506      */
 507     @Override
 508     public Set<ObjectName> lookupRuntimeBeans() {
 509         return lookupRuntimeBeans("*", "*");
 510     }
 511
 512     /**
 513      * {@inheritDoc}
 514      */
 515     @Override
 516     public Set<ObjectName> lookupRuntimeBeans(String moduleName,
 517                                               String instanceName) {
 518         if (moduleName == null) {
 519             moduleName = "*";
 520         }
 521         if (instanceName == null) {
 522             instanceName = "*";
 523         }
 524         ObjectName namePattern = ObjectNameUtil.createRuntimeBeanPattern(
 525                 moduleName, instanceName);
 526         return baseJMXRegistrator.queryNames(namePattern, null);
 527     }
 528
 529     @Override
 530     public void checkConfigBeanExists(ObjectName objectName) throws InstanceNotFoundException {
 531         ObjectNameUtil.checkDomain(objectName);
 532         ObjectNameUtil.checkType(objectName, ObjectNameUtil.TYPE_MODULE);
 533         String transactionName = ObjectNameUtil.getTransactionName(objectName);
 534         if (transactionName != null) {
 535             throw new IllegalArgumentException("Transaction attribute not supported in registry, wrong ObjectName: " + objectName);
 536         }
 537         // make sure exactly one match is found:
 538         LookupBeansUtil.lookupConfigBean(this, ObjectNameUtil.getFactoryName(objectName), ObjectNameUtil.getInstanceName(objectName));
 539     }
 540
 541     // service reference functionality:
 542     @Override
 543     public synchronized ObjectName lookupConfigBeanByServiceInterfaceName(String serviceInterfaceQName, String refName) {
 544         return readableSRRegistry.lookupConfigBeanByServiceInterfaceName(serviceInterfaceQName, refName);
 545     }
 546
 547     @Override
 548     public synchronized Map<String, Map<String, ObjectName>> getServiceMapping() {
 549         return readableSRRegistry.getServiceMapping();
 550     }
 551
 552     @Override
 553     public synchronized Map<String, ObjectName> lookupServiceReferencesByServiceInterfaceName(String serviceInterfaceQName) {
 554         return readableSRRegistry.lookupServiceReferencesByServiceInterfaceName(serviceInterfaceQName);
 555     }
 556
 557     @Override
 558     public synchronized Set<String> lookupServiceInterfaceNames(ObjectName objectName) throws InstanceNotFoundException {
 559         return readableSRRegistry.lookupServiceInterfaceNames(objectName);
 560     }
 561
 562     @Override
 563     public synchronized String getServiceInterfaceName(String namespace, String localName) {
 564         return readableSRRegistry.getServiceInterfaceName(namespace, localName);
 565     }
 566
 567     @Override
 568     public void checkServiceReferenceExists(ObjectName objectName) throws InstanceNotFoundException {
 569         readableSRRegistry.checkServiceReferenceExists(objectName);
 570     }
 571
 572     @Override
 573     public ObjectName getServiceReference(String serviceInterfaceQName, String refName) throws InstanceNotFoundException {
 574         return readableSRRegistry.getServiceReference(serviceInterfaceQName, refName);
 575     }
 576
 577     @Override
 578     public Set<String> getAvailableModuleFactoryQNames() {
 579         return ModuleQNameUtil.getQNames(resolver.getAllFactories());
 580     }
 581
 582     @Override
 583     public String toString() {
 584         return "ConfigRegistryImpl{" +
 585                 "versionCounter=" + versionCounter +
 586                 ", version=" + version +
 587                 '}';
 588     }
 589 }
 590
 591 /**
 592  * Holds currently running modules
 593  */
 594 @NotThreadSafe
 595 class ConfigHolder {
 596     private final Map<ModuleIdentifier, ModuleInternalInfo> currentConfig = new HashMap<>();
 597
 598     /**
 599      * Add all modules to the internal map. Also add service instance to OSGi
 600      * Service Registry.
 601      */
 602     public void addAll(Collection<ModuleInternalInfo> configInfos) {
 603         if (currentConfig.size() > 0) {
 604             throw new IllegalStateException(
 605                     "Error - some config entries were not removed: "
 606                             + currentConfig);
 607         }
 608         for (ModuleInternalInfo configInfo : configInfos) {
 609             add(configInfo);
 610         }
 611     }
 612
 613     private void add(ModuleInternalInfo configInfo) {
 614         ModuleInternalInfo oldValue = currentConfig.put(configInfo.getIdentifier(),
 615                 configInfo);
 616         if (oldValue != null) {
 617             throw new IllegalStateException(
 618                     "Cannot overwrite module with same name:"
 619                             + configInfo.getIdentifier() + ":" + configInfo);
 620         }
 621     }
 622
 623     /**
 624      * Remove entry from current config.
 625      */
 626     public void remove(ModuleIdentifier name) {
 627         ModuleInternalInfo removed = currentConfig.remove(name);
 628         if (removed == null) {
 629             throw new IllegalStateException(
 630                     "Cannot remove from ConfigHolder - name not found:" + name);
 631         }
 632     }
 633
 634     public Collection<ModuleInternalInfo> getEntries() {
 635         return currentConfig.values();
 636     }
 637
 638     public List<DestroyedModule> getModulesToBeDestroyed() {
 639         List<DestroyedModule> result = new ArrayList<>();
 640         for (ModuleInternalInfo moduleInternalInfo : getEntries()) {
 641             result.add(moduleInternalInfo.toDestroyedModule());
 642         }
 643         Collections.sort(result);
 644         return result;
 645     }
 646
 647
 648 }
 649
 650 /**
 651  * Holds Map<transactionName, transactionController> and purges it each time its
 652  * content is requested.
 653  */
 654 @NotThreadSafe
 655 class TransactionsHolder {
 656     /**
 657      * This map keeps transaction names and
 658      * {@link ConfigTransactionControllerInternal} instances, because platform
 659      * MBeanServer transforms mbeans into another representation. Map is cleaned
 660      * every time current transactions are requested.
 661      */
 662     @GuardedBy("ConfigRegistryImpl.this")
 663     private final Map<String /* transactionName */,
 664             Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = new HashMap<>();
 665
 666     /**
 667      * Can only be called from within synchronized method.
 668      */
 669     public void add(String transactionName,
 670                     ConfigTransactionControllerInternal transactionController, ConfigTransactionLookupRegistry txLookupRegistry) {
 671         Object oldValue = transactions.put(transactionName,
 672                 Maps.immutableEntry(transactionController, txLookupRegistry));
 673         if (oldValue != null) {
 674             throw new IllegalStateException(
 675                     "Error: two transactions with same name");
 676         }
 677     }
 678
 679     /**
 680      * Purges closed transactions from transactions map. Can only be called from
 681      * within synchronized method. Calling this method more than once within the
 682      * method can modify the resulting map that was obtained in previous calls.
 683      *
 684      * @return current view on transactions map.
 685      */
 686     public Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> getCurrentTransactions() {
 687         // first, remove closed transaction
 688         for (Iterator<Entry<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>>> it = transactions
 689                 .entrySet().iterator(); it.hasNext(); ) {
 690             Entry<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> entry = it
 691                     .next();
 692             if (entry.getValue().getKey().isClosed()) {
 693                 it.remove();
 694             }
 695         }
 696         return Collections.unmodifiableMap(transactions);
 697     }
 698 }