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;
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;
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;
54 import java.util.Map.Entry;
58 * Singleton that is responsible for creating and committing Config
59 * Transactions. It is registered in Platform MBean Server.
62 public class ConfigRegistryImpl implements AutoCloseable, ConfigRegistryImplMXBean {
63 private static final Logger logger = LoggerFactory.getLogger(ConfigRegistryImpl.class);
65 private final ModuleFactoriesResolver resolver;
66 private final MBeanServer configMBeanServer;
67 private final CodecRegistry codecRegistry;
70 private long version = 0;
72 private long versionCounter = 0;
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.
80 private final ConfigHolder currentConfig = new ConfigHolder();
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.
88 private boolean isHealthy = true;
91 * Holds Map<transactionName, transactionController> and purges it each time
92 * its content is requested.
95 private final TransactionsHolder transactionsHolder = new TransactionsHolder();
97 private final BaseJMXRegistrator baseJMXRegistrator;
99 private final BeanToOsgiServiceManager beanToOsgiServiceManager;
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;
106 // Used for finding new factory instances for default module functionality
108 private List<ModuleFactory> lastListOfFactories = Collections.emptyList();
110 @GuardedBy("this") // switched in every 2ndPC
111 private CloseableServiceReferenceReadableRegistry readableSRRegistry = ServiceReferenceRegistryImpl.createInitialSRLookupRegistry();
114 public ConfigRegistryImpl(ModuleFactoriesResolver resolver,
115 MBeanServer configMBeanServer, CodecRegistry codecRegistry) {
116 this(resolver, configMBeanServer,
117 new BaseJMXRegistrator(configMBeanServer), codecRegistry);
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());
136 * Create new {@link ConfigTransactionControllerImpl }
139 public synchronized ObjectName beginConfig() {
140 return beginConfig(false);
144 * @param blankTransaction true if this transaction is created automatically by
145 * org.opendaylight.controller.config.manager.impl.osgi.BlankTransactionServiceTracker
147 public synchronized ObjectName beginConfig(boolean blankTransaction) {
148 return beginConfigInternal(blankTransaction).getControllerObjectName();
151 private synchronized ConfigTransactionControllerInternal beginConfigInternal(boolean blankTransaction) {
153 final String transactionName = "ConfigTransaction-" + version + "-" + versionCounter;
155 TransactionJMXRegistratorFactory factory = new TransactionJMXRegistratorFactory() {
157 public TransactionJMXRegistrator create() {
158 return baseJMXRegistrator.createTransactionJMXRegistrator(transactionName);
162 Map<String, Map.Entry<ModuleFactory, BundleContext>> allCurrentFactories = new HashMap<>(
163 resolver.getAllFactories());
165 // add all factories that disappeared from SR but are still committed
166 for (ModuleInternalInfo moduleInternalInfo : currentConfig.getEntries()) {
167 String name = moduleInternalInfo.getModuleFactory().getImplementationName();
168 if (allCurrentFactories.containsKey(name) == false) {
169 logger.trace("Factory {} not found in SR, using reference from previous commit", name);
170 allCurrentFactories.put(name,
171 Maps.immutableEntry(moduleInternalInfo.getModuleFactory(), moduleInternalInfo.getBundleContext()));
174 allCurrentFactories = Collections.unmodifiableMap(allCurrentFactories);
176 // closed by transaction controller
177 ConfigTransactionLookupRegistry txLookupRegistry = new ConfigTransactionLookupRegistry(new TransactionIdentifier(
178 transactionName), factory, allCurrentFactories);
179 SearchableServiceReferenceWritableRegistry writableRegistry = ServiceReferenceRegistryImpl.createSRWritableRegistry(
180 readableSRRegistry, txLookupRegistry, allCurrentFactories);
182 ConfigTransactionControllerInternal transactionController = new ConfigTransactionControllerImpl(
183 txLookupRegistry, version, codecRegistry,
184 versionCounter, allCurrentFactories, transactionsMBeanServer,
185 configMBeanServer, blankTransaction, writableRegistry);
187 txLookupRegistry.registerMBean(transactionController, transactionController.getControllerObjectName());
188 } catch (InstanceAlreadyExistsException e) {
189 throw new IllegalStateException(e);
191 transactionController.copyExistingModulesAndProcessFactoryDiff(currentConfig.getEntries(), lastListOfFactories);
192 transactionsHolder.add(transactionName, transactionController, txLookupRegistry);
193 return transactionController;
200 @SuppressWarnings("PMD.AvoidCatchingThrowable")
201 public synchronized CommitStatus commitConfig(ObjectName transactionControllerON)
202 throws ConflictingVersionException, ValidationException {
203 final String transactionName = ObjectNameUtil
204 .getTransactionName(transactionControllerON);
205 logger.trace("About to commit {}. Current parentVersion: {}, versionCounter {}", transactionName, version, versionCounter);
207 // find ConfigTransactionController
208 Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = transactionsHolder.getCurrentTransactions();
209 Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry> configTransactionControllerEntry = transactions.get(transactionName);
210 if (configTransactionControllerEntry == null) {
211 throw new IllegalArgumentException(String.format(
212 "Transaction with name '%s' not found", transactionName));
214 ConfigTransactionControllerInternal configTransactionController = configTransactionControllerEntry.getKey();
215 // check optimistic lock
216 if (version != configTransactionController.getParentVersion()) {
217 throw new ConflictingVersionException(
219 "Optimistic lock failed. Expected parent version %d, was %d",
221 configTransactionController.getParentVersion()));
223 // optimistic lock ok
225 CommitInfo commitInfo = configTransactionController.validateBeforeCommitAndLockTransaction();
226 lastListOfFactories = Collections.unmodifiableList(configTransactionController.getCurrentlyRegisteredFactories());
227 // non recoverable from here:
229 return secondPhaseCommit(configTransactionController, commitInfo, configTransactionControllerEntry.getValue());
230 } catch (Error | RuntimeException t) { // some libs throw Errors: e.g.
231 // javax.xml.ws.spi.FactoryFinder$ConfigurationError
233 logger.error("Configuration Transaction failed on 2PC, server is unhealthy", t);
234 if (t instanceof RuntimeException) {
235 throw (RuntimeException) t;
242 private CommitStatus secondPhaseCommit(ConfigTransactionControllerInternal configTransactionController,
243 CommitInfo commitInfo, ConfigTransactionLookupRegistry txLookupRegistry) {
245 // close instances which were destroyed by the user, including
246 // (hopefully) runtime beans
247 for (DestroyedModule toBeDestroyed : commitInfo
248 .getDestroyedFromPreviousTransactions()) {
249 toBeDestroyed.close(); // closes instance (which should close
250 // runtime jmx registrator),
251 // also closes osgi registration and ModuleJMXRegistrator
253 currentConfig.remove(toBeDestroyed.getIdentifier());
256 // set RuntimeBeanRegistrators on beans implementing
257 // RuntimeBeanRegistratorAwareModule, each module
258 // should have exactly one runtime jmx registrator.
259 Map<ModuleIdentifier, RootRuntimeBeanRegistratorImpl> runtimeRegistrators = new HashMap<>();
260 for (ModuleInternalTransactionalInfo entry : commitInfo.getCommitted()
262 RootRuntimeBeanRegistratorImpl runtimeBeanRegistrator;
263 if (entry.hasOldModule() == false) {
264 runtimeBeanRegistrator = baseJMXRegistrator
265 .createRuntimeBeanRegistrator(entry.getIdentifier());
267 // reuse old JMX registrator
268 runtimeBeanRegistrator = entry.getOldInternalInfo()
269 .getRuntimeBeanRegistrator();
271 // set runtime jmx registrator if required
272 Module module = entry.getProxiedModule();
273 if (module instanceof RuntimeBeanRegistratorAwareModule) {
274 ((RuntimeBeanRegistratorAwareModule) module)
275 .setRuntimeBeanRegistrator(runtimeBeanRegistrator);
277 // save it to info so it is accessible afterwards
278 runtimeRegistrators.put(entry.getIdentifier(), runtimeBeanRegistrator);
281 // can register runtime beans
282 List<ModuleIdentifier> orderedModuleIdentifiers = configTransactionController.secondPhaseCommit();
283 txLookupRegistry.close();
284 configTransactionController.close();
286 // copy configuration to read only mode
287 List<ObjectName> newInstances = new LinkedList<>();
288 List<ObjectName> reusedInstances = new LinkedList<>();
289 List<ObjectName> recreatedInstances = new LinkedList<>();
291 Map<Module, ModuleInternalInfo> newConfigEntries = new HashMap<>();
294 for (ModuleIdentifier moduleIdentifier : orderedModuleIdentifiers) {
295 logger.trace("Registering {}", moduleIdentifier);
296 ModuleInternalTransactionalInfo entry = commitInfo.getCommitted()
297 .get(moduleIdentifier);
299 throw new NullPointerException("Module not found "
303 ObjectName primaryReadOnlyON = ObjectNameUtil
304 .createReadOnlyModuleON(moduleIdentifier);
306 // determine if current instance was recreated or reused or is new
308 // rules for closing resources:
309 // osgi registration - will be reused if possible.
310 // module jmx registration - will be (re)created every time, needs
312 // runtime jmx registration - should be taken care of by module
314 // instance - is closed only if it was destroyed
315 ModuleJMXRegistrator newModuleJMXRegistrator = baseJMXRegistrator
316 .createModuleJMXRegistrator();
318 OsgiRegistration osgiRegistration = null;
319 AutoCloseable instance = entry.getProxiedModule().getInstance();
320 if (entry.hasOldModule()) {
321 ModuleInternalInfo oldInternalInfo = entry.getOldInternalInfo();
322 DynamicReadableWrapper oldReadableConfigBean = oldInternalInfo.getReadableModule();
323 currentConfig.remove(entry.getIdentifier());
325 // test if old instance == new instance
326 if (oldReadableConfigBean.getInstance().equals(instance)) {
327 // reused old instance:
328 // wrap in readable dynamic mbean
329 reusedInstances.add(primaryReadOnlyON);
330 osgiRegistration = oldInternalInfo.getOsgiRegistration();
332 // recreated instance:
333 // it is responsibility of module to call the old instance -
334 // we just need to unregister configbean
335 recreatedInstances.add(primaryReadOnlyON);
337 // close old osgi registration
338 oldInternalInfo.getOsgiRegistration().close();
341 // close old module jmx registrator
342 oldInternalInfo.getModuleJMXRegistrator().close();
345 // wrap in readable dynamic mbean
346 newInstances.add(primaryReadOnlyON);
348 Module realModule = entry.getRealModule();
350 DynamicReadableWrapper newReadableConfigBean = new DynamicReadableWrapper(
351 realModule, instance, moduleIdentifier,
352 registryMBeanServer, configMBeanServer);
356 newModuleJMXRegistrator.registerMBean(newReadableConfigBean, primaryReadOnlyON);
357 } catch (InstanceAlreadyExistsException e) {
358 throw new IllegalStateException("Possible code error, already registered:" + primaryReadOnlyON,e);
361 // register services to OSGi
362 Map<ServiceInterfaceAnnotation, String /* service ref name */> annotationMapping = configTransactionController.getWritableRegistry().findServiceInterfaces(moduleIdentifier);
363 BundleContext bc = configTransactionController.getModuleFactoryBundleContext(
364 entry.getModuleFactory().getImplementationName());
365 if (osgiRegistration == null) {
366 osgiRegistration = beanToOsgiServiceManager.registerToOsgi(
367 newReadableConfigBean.getInstance(), moduleIdentifier, bc, annotationMapping);
369 osgiRegistration.updateRegistrations(annotationMapping, bc, instance);
372 RootRuntimeBeanRegistratorImpl runtimeBeanRegistrator = runtimeRegistrators
373 .get(entry.getIdentifier());
374 ModuleInternalInfo newInfo = new ModuleInternalInfo(
375 entry.getIdentifier(), newReadableConfigBean, osgiRegistration,
376 runtimeBeanRegistrator, newModuleJMXRegistrator,
377 orderingIdx, entry.isDefaultBean(), entry.getModuleFactory(), entry.getBundleContext());
379 newConfigEntries.put(realModule, newInfo);
382 currentConfig.addAll(newConfigEntries.values());
385 version = configTransactionController.getVersion();
387 // switch readable Service Reference Registry
388 this.readableSRRegistry.close();
389 this.readableSRRegistry = ServiceReferenceRegistryImpl.createSRReadableRegistry(
390 configTransactionController.getWritableRegistry(), this, baseJMXRegistrator);
392 return new CommitStatus(newInstances, reusedInstances,
400 public synchronized List<ObjectName> getOpenConfigs() {
401 Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = transactionsHolder
402 .getCurrentTransactions();
403 List<ObjectName> result = new ArrayList<>(transactions.size());
404 for (Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry> configTransactionControllerEntry : transactions
406 result.add(configTransactionControllerEntry.getKey().getControllerObjectName());
412 * Abort open transactions and unregister read only modules. Since this
413 * class is not responsible for registering itself under
414 * {@link org.opendaylight.controller.config.api.ConfigRegistry#OBJECT_NAME}, it will not unregister itself
418 public synchronized void close() {
419 // abort transactions
420 Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = transactionsHolder
421 .getCurrentTransactions();
422 for (Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry> configTransactionControllerEntry : transactions
425 ConfigTransactionControllerInternal configTransactionController = configTransactionControllerEntry.getKey();
427 configTransactionControllerEntry.getValue().close();
428 configTransactionController.abortConfig();
429 } catch (RuntimeException e) {
430 logger.warn("Ignoring exception while aborting {}",
431 configTransactionController, e);
435 // destroy all live objects one after another in order of the dependency
437 List<DestroyedModule> destroyedModules = currentConfig
438 .getModulesToBeDestroyed();
439 for (DestroyedModule destroyedModule : destroyedModules) {
440 destroyedModule.close();
442 // unregister MBeans that failed to unregister properly
443 baseJMXRegistrator.close();
444 // remove jmx servers
445 MBeanServerFactory.releaseMBeanServer(registryMBeanServer);
446 MBeanServerFactory.releaseMBeanServer(transactionsMBeanServer);
454 public long getVersion() {
462 public Set<String> getAvailableModuleNames() {
463 return new HierarchicalConfigMBeanFactoriesHolder(
464 resolver.getAllFactories()).getModuleNames();
471 public boolean isHealthy() {
481 public Set<ObjectName> lookupConfigBeans() {
482 return lookupConfigBeans("*", "*");
489 public Set<ObjectName> lookupConfigBeans(String moduleName) {
490 return lookupConfigBeans(moduleName, "*");
497 public ObjectName lookupConfigBean(String moduleName, String instanceName)
498 throws InstanceNotFoundException {
499 return LookupBeansUtil.lookupConfigBean(this, moduleName, instanceName);
506 public Set<ObjectName> lookupConfigBeans(String moduleName,
507 String instanceName) {
508 ObjectName namePattern = ObjectNameUtil.createModulePattern(moduleName,
510 return baseJMXRegistrator.queryNames(namePattern, null);
517 public Set<ObjectName> lookupRuntimeBeans() {
518 return lookupRuntimeBeans("*", "*");
525 public Set<ObjectName> lookupRuntimeBeans(String moduleName,
526 String instanceName) {
527 if (moduleName == null) {
530 if (instanceName == null) {
533 ObjectName namePattern = ObjectNameUtil.createRuntimeBeanPattern(
534 moduleName, instanceName);
535 return baseJMXRegistrator.queryNames(namePattern, null);
539 public void checkConfigBeanExists(ObjectName objectName) throws InstanceNotFoundException {
540 ObjectNameUtil.checkDomain(objectName);
541 ObjectNameUtil.checkType(objectName, ObjectNameUtil.TYPE_MODULE);
542 String transactionName = ObjectNameUtil.getTransactionName(objectName);
543 if (transactionName != null) {
544 throw new IllegalArgumentException("Transaction attribute not supported in registry, wrong ObjectName: " + objectName);
546 // make sure exactly one match is found:
547 LookupBeansUtil.lookupConfigBean(this, ObjectNameUtil.getFactoryName(objectName), ObjectNameUtil.getInstanceName(objectName));
550 // service reference functionality:
552 public synchronized ObjectName lookupConfigBeanByServiceInterfaceName(String serviceInterfaceQName, String refName) {
553 return readableSRRegistry.lookupConfigBeanByServiceInterfaceName(serviceInterfaceQName, refName);
557 public synchronized Map<String, Map<String, ObjectName>> getServiceMapping() {
558 return readableSRRegistry.getServiceMapping();
562 public synchronized Map<String, ObjectName> lookupServiceReferencesByServiceInterfaceName(String serviceInterfaceQName) {
563 return readableSRRegistry.lookupServiceReferencesByServiceInterfaceName(serviceInterfaceQName);
567 public synchronized Set<String> lookupServiceInterfaceNames(ObjectName objectName) throws InstanceNotFoundException {
568 return readableSRRegistry.lookupServiceInterfaceNames(objectName);
572 public synchronized String getServiceInterfaceName(String namespace, String localName) {
573 return readableSRRegistry.getServiceInterfaceName(namespace, localName);
577 public void checkServiceReferenceExists(ObjectName objectName) throws InstanceNotFoundException {
578 readableSRRegistry.checkServiceReferenceExists(objectName);
582 public ObjectName getServiceReference(String serviceInterfaceQName, String refName) throws InstanceNotFoundException {
583 return readableSRRegistry.getServiceReference(serviceInterfaceQName, refName);
587 public Set<String> getAvailableModuleFactoryQNames() {
588 return ModuleQNameUtil.getQNames(resolver.getAllFactories());
592 public String toString() {
593 return "ConfigRegistryImpl{" +
594 "versionCounter=" + versionCounter +
595 ", version=" + version +
601 * Holds currently running modules
605 private final Map<ModuleIdentifier, ModuleInternalInfo> currentConfig = new HashMap<>();
608 * Add all modules to the internal map. Also add service instance to OSGi
611 public void addAll(Collection<ModuleInternalInfo> configInfos) {
612 if (currentConfig.size() > 0) {
613 throw new IllegalStateException(
614 "Error - some config entries were not removed: "
617 for (ModuleInternalInfo configInfo : configInfos) {
622 private void add(ModuleInternalInfo configInfo) {
623 ModuleInternalInfo oldValue = currentConfig.put(configInfo.getIdentifier(),
625 if (oldValue != null) {
626 throw new IllegalStateException(
627 "Cannot overwrite module with same name:"
628 + configInfo.getIdentifier() + ":" + configInfo);
633 * Remove entry from current config.
635 public void remove(ModuleIdentifier name) {
636 ModuleInternalInfo removed = currentConfig.remove(name);
637 if (removed == null) {
638 throw new IllegalStateException(
639 "Cannot remove from ConfigHolder - name not found:" + name);
643 public Collection<ModuleInternalInfo> getEntries() {
644 return currentConfig.values();
647 public List<DestroyedModule> getModulesToBeDestroyed() {
648 List<DestroyedModule> result = new ArrayList<>();
649 for (ModuleInternalInfo moduleInternalInfo : getEntries()) {
650 result.add(moduleInternalInfo.toDestroyedModule());
652 Collections.sort(result);
660 * Holds Map<transactionName, transactionController> and purges it each time its
661 * content is requested.
664 class TransactionsHolder {
666 * This map keeps transaction names and
667 * {@link ConfigTransactionControllerInternal} instances, because platform
668 * MBeanServer transforms mbeans into another representation. Map is cleaned
669 * every time current transactions are requested.
671 @GuardedBy("ConfigRegistryImpl.this")
672 private final Map<String /* transactionName */,
673 Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = new HashMap<>();
676 * Can only be called from within synchronized method.
678 public void add(String transactionName,
679 ConfigTransactionControllerInternal transactionController, ConfigTransactionLookupRegistry txLookupRegistry) {
680 Object oldValue = transactions.put(transactionName,
681 Maps.immutableEntry(transactionController, txLookupRegistry));
682 if (oldValue != null) {
683 throw new IllegalStateException(
684 "Error: two transactions with same name");
689 * Purges closed transactions from transactions map. Can only be called from
690 * within synchronized method. Calling this method more than once within the
691 * method can modify the resulting map that was obtained in previous calls.
693 * @return current view on transactions map.
695 public Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> getCurrentTransactions() {
696 // first, remove closed transaction
697 for (Iterator<Entry<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>>> it = transactions
698 .entrySet().iterator(); it.hasNext(); ) {
699 Entry<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> entry = it
701 if (entry.getValue().getKey().isClosed()) {
705 return Collections.unmodifiableMap(transactions);