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 java.util.ArrayList;
12 import java.util.Collection;
13 import java.util.Collections;
14 import java.util.HashMap;
15 import java.util.Iterator;
16 import java.util.LinkedList;
17 import java.util.List;
19 import java.util.Map.Entry;
21 import javax.annotation.concurrent.GuardedBy;
22 import javax.annotation.concurrent.NotThreadSafe;
23 import javax.annotation.concurrent.ThreadSafe;
24 import javax.management.InstanceAlreadyExistsException;
25 import javax.management.InstanceNotFoundException;
26 import javax.management.MBeanServer;
27 import javax.management.MBeanServerFactory;
28 import javax.management.ObjectName;
29 import org.opendaylight.controller.config.api.ConflictingVersionException;
30 import org.opendaylight.controller.config.api.ModuleIdentifier;
31 import org.opendaylight.controller.config.api.RuntimeBeanRegistratorAwareModule;
32 import org.opendaylight.controller.config.api.ValidationException;
33 import org.opendaylight.controller.config.api.annotations.ServiceInterfaceAnnotation;
34 import org.opendaylight.controller.config.api.jmx.CommitStatus;
35 import org.opendaylight.controller.config.api.jmx.ObjectNameUtil;
36 import org.opendaylight.controller.config.manager.impl.dependencyresolver.DestroyedModule;
37 import org.opendaylight.controller.config.manager.impl.dependencyresolver.ModuleInternalTransactionalInfo;
38 import org.opendaylight.controller.config.manager.impl.dynamicmbean.DynamicReadableWrapper;
39 import org.opendaylight.controller.config.manager.impl.factoriesresolver.HierarchicalConfigMBeanFactoriesHolder;
40 import org.opendaylight.controller.config.manager.impl.factoriesresolver.ModuleFactoriesResolver;
41 import org.opendaylight.controller.config.manager.impl.jmx.BaseJMXRegistrator;
42 import org.opendaylight.controller.config.manager.impl.jmx.ModuleJMXRegistrator;
43 import org.opendaylight.controller.config.manager.impl.jmx.RootRuntimeBeanRegistratorImpl;
44 import org.opendaylight.controller.config.manager.impl.jmx.TransactionJMXRegistrator;
45 import org.opendaylight.controller.config.manager.impl.osgi.BeanToOsgiServiceManager;
46 import org.opendaylight.controller.config.manager.impl.osgi.BeanToOsgiServiceManager.OsgiRegistration;
47 import org.opendaylight.controller.config.manager.impl.osgi.mapping.BindingContextProvider;
48 import org.opendaylight.controller.config.manager.impl.util.LookupBeansUtil;
49 import org.opendaylight.controller.config.manager.impl.util.ModuleQNameUtil;
50 import org.opendaylight.controller.config.spi.Module;
51 import org.opendaylight.controller.config.spi.ModuleFactory;
52 import org.osgi.framework.BundleContext;
53 import org.slf4j.Logger;
54 import org.slf4j.LoggerFactory;
57 * Singleton that is responsible for creating and committing Config
58 * Transactions. It is registered in Platform MBean Server.
61 public class ConfigRegistryImpl implements AutoCloseable, ConfigRegistryImplMXBean {
62 private static final Logger LOG = LoggerFactory.getLogger(ConfigRegistryImpl.class);
64 private final ModuleFactoriesResolver resolver;
65 private final MBeanServer configMBeanServer;
66 private final BindingContextProvider bindingContextProvider;
69 private long version = 0;
71 private long versionCounter = 0;
74 * Contains current configuration in form of {moduleName:{instanceName,read
75 * only module}} for copying state to new transaction. Each running module
76 * is present just once, no matter how many interfaces it exposes.
79 private final ConfigHolder currentConfig = new ConfigHolder();
82 * Will return true unless there was a transaction that succeeded during
83 * validation but failed in second phase of commit. In this case the server
84 * is unstable and its state is undefined.
87 private boolean isHealthy = true;
90 * Holds Map<transactionName, transactionController> and purges it each time
91 * its content is requested.
94 private final TransactionsHolder transactionsHolder = new TransactionsHolder();
96 private final BaseJMXRegistrator baseJMXRegistrator;
98 private final BeanToOsgiServiceManager beanToOsgiServiceManager;
100 // internal jmx server for read only beans
101 private final MBeanServer registryMBeanServer;
102 // internal jmx server shared by all transactions
103 private final MBeanServer transactionsMBeanServer;
105 // Used for finding new factory instances for default module functionality
107 private List<ModuleFactory> lastListOfFactories = Collections.emptyList();
109 @GuardedBy("this") // switched in every 2ndPC
110 private CloseableServiceReferenceReadableRegistry readableSRRegistry = ServiceReferenceRegistryImpl.createInitialSRLookupRegistry();
113 public ConfigRegistryImpl(ModuleFactoriesResolver resolver,
114 MBeanServer configMBeanServer, BindingContextProvider bindingContextProvider) {
115 this(resolver, configMBeanServer,
116 new BaseJMXRegistrator(configMBeanServer), bindingContextProvider);
120 public ConfigRegistryImpl(ModuleFactoriesResolver resolver,
121 MBeanServer configMBeanServer,
122 BaseJMXRegistrator baseJMXRegistrator, BindingContextProvider bindingContextProvider) {
123 this.resolver = resolver;
124 this.beanToOsgiServiceManager = new BeanToOsgiServiceManager();
125 this.configMBeanServer = configMBeanServer;
126 this.baseJMXRegistrator = baseJMXRegistrator;
127 this.bindingContextProvider = bindingContextProvider;
128 this.registryMBeanServer = MBeanServerFactory
129 .createMBeanServer("ConfigRegistry" + configMBeanServer.getDefaultDomain());
130 this.transactionsMBeanServer = MBeanServerFactory
131 .createMBeanServer("ConfigTransactions" + configMBeanServer.getDefaultDomain());
135 * Create new {@link ConfigTransactionControllerImpl }
138 public synchronized ObjectName beginConfig() {
139 return beginConfig(false);
143 * @param blankTransaction true if this transaction is created automatically by
144 * org.opendaylight.controller.config.manager.impl.osgi.BlankTransactionServiceTracker
146 public synchronized ObjectName beginConfig(boolean blankTransaction) {
147 return beginConfigInternal(blankTransaction).getControllerObjectName();
150 private synchronized ConfigTransactionControllerInternal beginConfigInternal(boolean blankTransaction) {
152 final String transactionName = "ConfigTransaction-" + version + "-" + versionCounter;
154 TransactionJMXRegistratorFactory factory = new TransactionJMXRegistratorFactory() {
156 public TransactionJMXRegistrator create() {
157 return baseJMXRegistrator.createTransactionJMXRegistrator(transactionName);
161 Map<String, Map.Entry<ModuleFactory, BundleContext>> allCurrentFactories = new HashMap<>(
162 resolver.getAllFactories());
164 // add all factories that disappeared from SR but are still committed
165 for (ModuleInternalInfo moduleInternalInfo : currentConfig.getEntries()) {
166 String name = moduleInternalInfo.getModuleFactory().getImplementationName();
167 if (allCurrentFactories.containsKey(name) == false) {
168 LOG.trace("Factory {} not found in SR, using reference from previous commit", name);
169 allCurrentFactories.put(name,
170 Maps.immutableEntry(moduleInternalInfo.getModuleFactory(), moduleInternalInfo.getBundleContext()));
173 allCurrentFactories = Collections.unmodifiableMap(allCurrentFactories);
175 // closed by transaction controller
176 ConfigTransactionLookupRegistry txLookupRegistry = new ConfigTransactionLookupRegistry(new TransactionIdentifier(
177 transactionName), factory, allCurrentFactories);
178 SearchableServiceReferenceWritableRegistry writableRegistry = ServiceReferenceRegistryImpl.createSRWritableRegistry(
179 readableSRRegistry, txLookupRegistry, allCurrentFactories);
181 ConfigTransactionControllerInternal transactionController = new ConfigTransactionControllerImpl(
182 txLookupRegistry, version, bindingContextProvider,
183 versionCounter, allCurrentFactories, transactionsMBeanServer,
184 configMBeanServer, blankTransaction, writableRegistry);
186 txLookupRegistry.registerMBean(transactionController, transactionController.getControllerObjectName());
187 } catch (InstanceAlreadyExistsException e) {
188 throw new IllegalStateException(e);
190 transactionController.copyExistingModulesAndProcessFactoryDiff(currentConfig.getEntries(), lastListOfFactories);
191 transactionsHolder.add(transactionName, transactionController, txLookupRegistry);
192 return transactionController;
199 public synchronized CommitStatus commitConfig(ObjectName transactionControllerON)
200 throws ConflictingVersionException, ValidationException {
201 final String transactionName = ObjectNameUtil
202 .getTransactionName(transactionControllerON);
203 LOG.trace("About to commit {}. Current parentVersion: {}, versionCounter {}", transactionName, version, versionCounter);
205 // find ConfigTransactionController
206 Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = transactionsHolder.getCurrentTransactions();
207 Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry> configTransactionControllerEntry = transactions.get(transactionName);
208 if (configTransactionControllerEntry == null) {
209 throw new IllegalArgumentException(String.format(
210 "Transaction with name '%s' not found", transactionName));
212 ConfigTransactionControllerInternal configTransactionController = configTransactionControllerEntry.getKey();
213 // check optimistic lock
214 if (version != configTransactionController.getParentVersion()) {
215 throw new ConflictingVersionException(
217 "Optimistic lock failed. Expected parent version %d, was %d",
219 configTransactionController.getParentVersion()));
221 // optimistic lock ok
223 CommitInfo commitInfo = configTransactionController.validateBeforeCommitAndLockTransaction();
224 lastListOfFactories = Collections.unmodifiableList(configTransactionController.getCurrentlyRegisteredFactories());
225 // non recoverable from here:
227 return secondPhaseCommit(configTransactionController, commitInfo, configTransactionControllerEntry.getValue());
228 } catch (Error | RuntimeException t) { // some libs throw Errors: e.g.
229 // javax.xml.ws.spi.FactoryFinder$ConfigurationError
231 LOG.error("Configuration Transaction failed on 2PC, server is unhealthy", t);
232 if (t instanceof RuntimeException) {
233 throw (RuntimeException) t;
240 private CommitStatus secondPhaseCommit(ConfigTransactionControllerInternal configTransactionController,
241 CommitInfo commitInfo, ConfigTransactionLookupRegistry txLookupRegistry) {
243 // close instances which were destroyed by the user, including
244 // (hopefully) runtime beans
245 for (DestroyedModule toBeDestroyed : commitInfo
246 .getDestroyedFromPreviousTransactions()) {
247 toBeDestroyed.close(); // closes instance (which should close
248 // runtime jmx registrator),
249 // also closes osgi registration and ModuleJMXRegistrator
251 currentConfig.remove(toBeDestroyed.getIdentifier());
254 // set RuntimeBeanRegistrators on beans implementing
255 // RuntimeBeanRegistratorAwareModule, each module
256 // should have exactly one runtime jmx registrator.
257 Map<ModuleIdentifier, RootRuntimeBeanRegistratorImpl> runtimeRegistrators = new HashMap<>();
258 for (ModuleInternalTransactionalInfo entry : commitInfo.getCommitted()
260 RootRuntimeBeanRegistratorImpl runtimeBeanRegistrator;
261 if (entry.hasOldModule() == false) {
262 runtimeBeanRegistrator = baseJMXRegistrator
263 .createRuntimeBeanRegistrator(entry.getIdentifier());
265 // reuse old JMX registrator
266 runtimeBeanRegistrator = entry.getOldInternalInfo()
267 .getRuntimeBeanRegistrator();
269 // set runtime jmx registrator if required
270 Module module = entry.getProxiedModule();
271 if (module instanceof RuntimeBeanRegistratorAwareModule) {
272 ((RuntimeBeanRegistratorAwareModule) module)
273 .setRuntimeBeanRegistrator(runtimeBeanRegistrator);
275 // save it to info so it is accessible afterwards
276 runtimeRegistrators.put(entry.getIdentifier(), runtimeBeanRegistrator);
279 // can register runtime beans
280 List<ModuleIdentifier> orderedModuleIdentifiers = configTransactionController.secondPhaseCommit();
281 txLookupRegistry.close();
282 configTransactionController.close();
284 // copy configuration to read only mode
285 List<ObjectName> newInstances = new LinkedList<>();
286 List<ObjectName> reusedInstances = new LinkedList<>();
287 List<ObjectName> recreatedInstances = new LinkedList<>();
289 Map<Module, ModuleInternalInfo> newConfigEntries = new HashMap<>();
292 for (ModuleIdentifier moduleIdentifier : orderedModuleIdentifiers) {
293 LOG.trace("Registering {}", moduleIdentifier);
294 ModuleInternalTransactionalInfo entry = commitInfo.getCommitted()
295 .get(moduleIdentifier);
297 throw new NullPointerException("Module not found "
301 ObjectName primaryReadOnlyON = ObjectNameUtil
302 .createReadOnlyModuleON(moduleIdentifier);
304 // determine if current instance was recreated or reused or is new
306 // rules for closing resources:
307 // osgi registration - will be reused if possible.
308 // module jmx registration - will be (re)created every time, needs
310 // runtime jmx registration - should be taken care of by module
312 // instance - is closed only if it was destroyed
313 ModuleJMXRegistrator newModuleJMXRegistrator = baseJMXRegistrator
314 .createModuleJMXRegistrator();
316 OsgiRegistration osgiRegistration = null;
317 AutoCloseable instance = entry.getProxiedModule().getInstance();
318 if (entry.hasOldModule()) {
319 ModuleInternalInfo oldInternalInfo = entry.getOldInternalInfo();
320 DynamicReadableWrapper oldReadableConfigBean = oldInternalInfo.getReadableModule();
321 currentConfig.remove(entry.getIdentifier());
323 // test if old instance == new instance
324 if (oldReadableConfigBean.getInstance().equals(instance)) {
325 // reused old instance:
326 // wrap in readable dynamic mbean
327 reusedInstances.add(primaryReadOnlyON);
328 osgiRegistration = oldInternalInfo.getOsgiRegistration();
330 // recreated instance:
331 // it is responsibility of module to call the old instance -
332 // we just need to unregister configbean
333 recreatedInstances.add(primaryReadOnlyON);
335 // close old osgi registration
336 oldInternalInfo.getOsgiRegistration().close();
339 // close old module jmx registrator
340 oldInternalInfo.getModuleJMXRegistrator().close();
343 // wrap in readable dynamic mbean
344 newInstances.add(primaryReadOnlyON);
346 Module realModule = entry.getRealModule();
348 DynamicReadableWrapper newReadableConfigBean = new DynamicReadableWrapper(
349 realModule, instance, moduleIdentifier,
350 registryMBeanServer, configMBeanServer);
354 newModuleJMXRegistrator.registerMBean(newReadableConfigBean, primaryReadOnlyON);
355 } catch (InstanceAlreadyExistsException e) {
356 throw new IllegalStateException("Possible code error, already registered:" + primaryReadOnlyON,e);
359 // register services to OSGi
360 Map<ServiceInterfaceAnnotation, String /* service ref name */> annotationMapping = configTransactionController.getWritableRegistry().findServiceInterfaces(moduleIdentifier);
361 BundleContext bc = configTransactionController.getModuleFactoryBundleContext(
362 entry.getModuleFactory().getImplementationName());
363 if (osgiRegistration == null) {
364 osgiRegistration = beanToOsgiServiceManager.registerToOsgi(
365 newReadableConfigBean.getInstance(), moduleIdentifier, bc, annotationMapping);
367 osgiRegistration.updateRegistrations(annotationMapping, bc, instance);
370 RootRuntimeBeanRegistratorImpl runtimeBeanRegistrator = runtimeRegistrators
371 .get(entry.getIdentifier());
372 ModuleInternalInfo newInfo = new ModuleInternalInfo(
373 entry.getIdentifier(), newReadableConfigBean, osgiRegistration,
374 runtimeBeanRegistrator, newModuleJMXRegistrator,
375 orderingIdx, entry.isDefaultBean(), entry.getModuleFactory(), entry.getBundleContext());
377 newConfigEntries.put(realModule, newInfo);
380 currentConfig.addAll(newConfigEntries.values());
383 version = configTransactionController.getVersion();
385 // switch readable Service Reference Registry
386 this.readableSRRegistry.close();
387 this.readableSRRegistry = ServiceReferenceRegistryImpl.createSRReadableRegistry(
388 configTransactionController.getWritableRegistry(), this, baseJMXRegistrator);
390 return new CommitStatus(newInstances, reusedInstances,
398 public synchronized List<ObjectName> getOpenConfigs() {
399 Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = transactionsHolder
400 .getCurrentTransactions();
401 List<ObjectName> result = new ArrayList<>(transactions.size());
402 for (Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry> configTransactionControllerEntry : transactions
404 result.add(configTransactionControllerEntry.getKey().getControllerObjectName());
410 * Abort open transactions and unregister read only modules. Since this
411 * class is not responsible for registering itself under
412 * {@link org.opendaylight.controller.config.api.ConfigRegistry#OBJECT_NAME}, it will not unregister itself
416 public synchronized void close() {
417 // abort transactions
418 Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = transactionsHolder
419 .getCurrentTransactions();
420 for (Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry> configTransactionControllerEntry : transactions
423 ConfigTransactionControllerInternal configTransactionController = configTransactionControllerEntry.getKey();
425 configTransactionControllerEntry.getValue().close();
426 configTransactionController.abortConfig();
427 } catch (RuntimeException e) {
428 LOG.warn("Ignoring exception while aborting {}",
429 configTransactionController, e);
433 // destroy all live objects one after another in order of the dependency hierarchy, from top to bottom
434 List<DestroyedModule> destroyedModules = currentConfig
435 .getModulesToBeDestroyed();
436 for (DestroyedModule destroyedModule : destroyedModules) {
437 destroyedModule.close();
439 // unregister MBeans that failed to unregister properly
440 baseJMXRegistrator.close();
441 // remove jmx servers
442 MBeanServerFactory.releaseMBeanServer(registryMBeanServer);
443 MBeanServerFactory.releaseMBeanServer(transactionsMBeanServer);
451 public long getVersion() {
459 public Set<String> getAvailableModuleNames() {
460 return new HierarchicalConfigMBeanFactoriesHolder(
461 resolver.getAllFactories()).getModuleNames();
468 public boolean isHealthy() {
478 public Set<ObjectName> lookupConfigBeans() {
479 return lookupConfigBeans("*", "*");
486 public Set<ObjectName> lookupConfigBeans(String moduleName) {
487 return lookupConfigBeans(moduleName, "*");
494 public ObjectName lookupConfigBean(String moduleName, String instanceName)
495 throws InstanceNotFoundException {
496 return LookupBeansUtil.lookupConfigBean(this, moduleName, instanceName);
503 public Set<ObjectName> lookupConfigBeans(String moduleName,
504 String instanceName) {
505 ObjectName namePattern = ObjectNameUtil.createModulePattern(moduleName,
507 return baseJMXRegistrator.queryNames(namePattern, null);
514 public Set<ObjectName> lookupRuntimeBeans() {
515 return lookupRuntimeBeans("*", "*");
522 public Set<ObjectName> lookupRuntimeBeans(String moduleName,
523 String instanceName) {
524 String finalModuleName = moduleName == null ? "*" : moduleName;
525 String finalInstanceName = instanceName == null ? "*" : instanceName;
526 ObjectName namePattern = ObjectNameUtil.createRuntimeBeanPattern(
527 finalModuleName, finalInstanceName);
528 return baseJMXRegistrator.queryNames(namePattern, null);
532 public void checkConfigBeanExists(ObjectName objectName) throws InstanceNotFoundException {
533 ObjectNameUtil.checkDomain(objectName);
534 ObjectNameUtil.checkType(objectName, ObjectNameUtil.TYPE_MODULE);
535 String transactionName = ObjectNameUtil.getTransactionName(objectName);
536 if (transactionName != null) {
537 throw new IllegalArgumentException("Transaction attribute not supported in registry, wrong ObjectName: " + objectName);
539 // make sure exactly one match is found:
540 LookupBeansUtil.lookupConfigBean(this, ObjectNameUtil.getFactoryName(objectName), ObjectNameUtil.getInstanceName(objectName));
543 // service reference functionality:
545 public synchronized ObjectName lookupConfigBeanByServiceInterfaceName(String serviceInterfaceQName, String refName) {
546 return readableSRRegistry.lookupConfigBeanByServiceInterfaceName(serviceInterfaceQName, refName);
550 public synchronized Map<String, Map<String, ObjectName>> getServiceMapping() {
551 return readableSRRegistry.getServiceMapping();
555 public synchronized Map<String, ObjectName> lookupServiceReferencesByServiceInterfaceName(String serviceInterfaceQName) {
556 return readableSRRegistry.lookupServiceReferencesByServiceInterfaceName(serviceInterfaceQName);
560 public synchronized Set<String> lookupServiceInterfaceNames(ObjectName objectName) throws InstanceNotFoundException {
561 return readableSRRegistry.lookupServiceInterfaceNames(objectName);
565 public synchronized String getServiceInterfaceName(String namespace, String localName) {
566 return readableSRRegistry.getServiceInterfaceName(namespace, localName);
570 public void checkServiceReferenceExists(ObjectName objectName) throws InstanceNotFoundException {
571 readableSRRegistry.checkServiceReferenceExists(objectName);
575 public ObjectName getServiceReference(String serviceInterfaceQName, String refName) throws InstanceNotFoundException {
576 return readableSRRegistry.getServiceReference(serviceInterfaceQName, refName);
580 public Set<String> getAvailableModuleFactoryQNames() {
581 return ModuleQNameUtil.getQNames(resolver.getAllFactories());
585 public String toString() {
586 return "ConfigRegistryImpl{" +
587 "versionCounter=" + versionCounter +
588 ", version=" + version +
594 * Holds currently running modules
598 private final Map<ModuleIdentifier, ModuleInternalInfo> currentConfig = new HashMap<>();
601 * Add all modules to the internal map. Also add service instance to OSGi
604 public void addAll(Collection<ModuleInternalInfo> configInfos) {
605 if (!currentConfig.isEmpty()) {
606 throw new IllegalStateException(
607 "Error - some config entries were not removed: "
610 for (ModuleInternalInfo configInfo : configInfos) {
615 private void add(ModuleInternalInfo configInfo) {
616 ModuleInternalInfo oldValue = currentConfig.put(configInfo.getIdentifier(),
618 if (oldValue != null) {
619 throw new IllegalStateException(
620 "Cannot overwrite module with same name:"
621 + configInfo.getIdentifier() + ":" + configInfo);
626 * Remove entry from current config.
628 public void remove(ModuleIdentifier name) {
629 ModuleInternalInfo removed = currentConfig.remove(name);
630 if (removed == null) {
631 throw new IllegalStateException(
632 "Cannot remove from ConfigHolder - name not found:" + name);
636 public Collection<ModuleInternalInfo> getEntries() {
637 return currentConfig.values();
640 public List<DestroyedModule> getModulesToBeDestroyed() {
641 List<DestroyedModule> result = new ArrayList<>();
642 for (ModuleInternalInfo moduleInternalInfo : getEntries()) {
643 result.add(moduleInternalInfo.toDestroyedModule());
645 Collections.sort(result);
653 * Holds Map<transactionName, transactionController> and purges it each time its
654 * content is requested.
657 class TransactionsHolder {
659 * This map keeps transaction names and
660 * {@link ConfigTransactionControllerInternal} instances, because platform
661 * MBeanServer transforms mbeans into another representation. Map is cleaned
662 * every time current transactions are requested.
664 @GuardedBy("ConfigRegistryImpl.this")
665 private final Map<String /* transactionName */,
666 Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> transactions = new HashMap<>();
669 * Can only be called from within synchronized method.
671 public void add(String transactionName,
672 ConfigTransactionControllerInternal transactionController, ConfigTransactionLookupRegistry txLookupRegistry) {
673 Object oldValue = transactions.put(transactionName,
674 Maps.immutableEntry(transactionController, txLookupRegistry));
675 if (oldValue != null) {
676 throw new IllegalStateException(
677 "Error: two transactions with same name");
682 * Purges closed transactions from transactions map. Can only be called from
683 * within synchronized method. Calling this method more than once within the
684 * method can modify the resulting map that was obtained in previous calls.
686 * @return current view on transactions map.
688 public Map<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> getCurrentTransactions() {
689 // first, remove closed transaction
690 for (Iterator<Entry<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>>> it = transactions
691 .entrySet().iterator(); it.hasNext(); ) {
692 Entry<String, Entry<ConfigTransactionControllerInternal, ConfigTransactionLookupRegistry>> entry = it
694 if (entry.getValue().getKey().isClosed()) {
698 return Collections.unmodifiableMap(transactions);