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net.sf.hajdbc.sql.DatabaseClusterImpl Maven / Gradle / Ivy
/*
* HA-JDBC: High-Availability JDBC
* Copyright (C) 2012 Paul Ferraro
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see > implements DatabaseCluster
{
static final Logger logger = LoggerFactory.getLogger(DatabaseClusterImpl.class);
private final String id;
final DatabaseClusterConfiguration configuration;
private Balancer balancer;
private Dialect dialect;
private Durability durability;
private DatabaseMetaDataCache databaseMetaDataCache;
private ExecutorService executor;
private Decoder decoder;
private CronThreadPoolExecutor cronExecutor;
private LockManager lockManager;
private StateManager stateManager;
private InputSinkStrategy sinkSourceFactory;
private boolean active = false;
private String localDbId = null;
private final List> configurationListeners = new CopyOnWriteArrayList>();
private final List clusterListeners = new CopyOnWriteArrayList();
private final List synchronizationListeners = new CopyOnWriteArrayList();
private final List nodeStateListeners = new CopyOnWriteArrayList<>();
private final List nodeDatabaseRestoreListeners = new CopyOnWriteArrayList<>();
public DatabaseClusterImpl(String id, DatabaseClusterConfiguration configuration, DatabaseClusterConfigurationListener listener)
{
this.id = id;
this.configuration = configuration;
if (listener != null)
{
this.configurationListeners.add(listener);
}
}
/**
* Deactivates the specified database.
* @param databaseId a database identifier
* @throws IllegalArgumentException if no database exists with the specified identifier.
*/
@ManagedOperation
public void deactivate(String databaseId)
{
this.deactivate(this.getDatabase(databaseId), this.stateManager);
}
/**
* Synchronizes, using the default strategy, and reactivates the specified database.
* @param databaseId a database identifier
* @throws IllegalArgumentException if no database exists with the specified identifier.
* @throws IllegalStateException if synchronization fails.
*/
@ManagedOperation
public void activate(String databaseId)
{
this.activate(databaseId, this.configuration.getDefaultSynchronizationStrategy());
}
/**
* Synchronizes, using the specified strategy, and reactivates the specified database.
* @param databaseId a database identifier
* @param strategyId the identifer of a synchronization strategy
* @throws IllegalArgumentException if no database exists with the specified identifier, or no synchronization strategy exists with the specified identifier.
* @throws IllegalStateException if synchronization fails.
*/
@ManagedOperation
public void activate(String databaseId, String strategyId)
{
SynchronizationStrategy strategy = this.configuration.getSynchronizationStrategyMap().get(strategyId);
if (strategy == null)
{
throw new IllegalArgumentException(Messages.INVALID_SYNC_STRATEGY.getMessage(strategyId));
}
try
{
if (this.activate(this.getDatabase(databaseId), strategy))
{
logger.log(Level.INFO, Messages.DATABASE_ACTIVATED.getMessage(this, databaseId));
}
}
catch (SQLException e)
{
logger.log(Level.WARN, e, Messages.DATABASE_ACTIVATE_FAILED.getMessage(this, databaseId));
SQLException exception = e.getNextException();
while (exception != null)
{
logger.log(Level.ERROR, exception);
exception = exception.getNextException();
}
throw new IllegalStateException(e.toString());
}
catch (InterruptedException e)
{
logger.log(Level.WARN, e);
Thread.currentThread().interrupt();
}
}
/**
* Determines whether or not the specified database is responsive
* @param databaseId a database identifier
* @return true, if the database is alive, false otherwise
* @throws IllegalArgumentException if no database exists with the specified identifier.
*/
@ManagedOperation
public boolean isAlive(String databaseId)
{
return this.isAlive(this.getDatabase(databaseId), Level.WARN);
}
/**
* Returns a collection of active databases in this cluster.
* @return a list of database identifiers
*/
@ManagedAttribute
public Set getActiveDatabases()
{
Set databases = new TreeSet();
for (D database: this.balancer)
{
databases.add(database.getId());
}
return databases;
}
/**
* Returns a collection of inactive databases in this cluster.
* @return a collection of database identifiers
*/
@ManagedAttribute
public Set getInactiveDatabases()
{
Set databases = new TreeSet(this.configuration.getDatabaseMap().keySet());
for (D database: this.balancer)
{
databases.remove(database.getId());
}
return databases;
}
/**
* Return the current HA-JDBC version
* @return the current version
*/
@ManagedAttribute
public String getVersion()
{
return Version.CURRENT.toString();
}
/**
* Removes the specified database from the cluster.
* @param databaseId a database identifier
* @throws JMException
* @throws IllegalArgumentException if database already exists.
*/
@ManagedOperation
public void add(String databaseId) throws JMException
{
D database = this.configuration.getDatabaseFactory().createDatabase(databaseId);
if (this.configuration.getDatabaseMap().putIfAbsent(databaseId, database) != null)
{
throw new IllegalArgumentException(Messages.DATABASE_ALREADY_EXISTS.getMessage(databaseId, this));
}
this.configuration.getMBeanRegistrar().register(this, database);
for (DatabaseClusterConfigurationListener listener: this.configurationListeners)
{
listener.added(database, this.configuration);
}
}
/**
* Removes the specified database from the cluster.
* @param databaseId a database identifier
* @throws IllegalStateException if database is still active.
*/
@ManagedOperation
public void remove(String databaseId)
{
D database = this.getDatabase(databaseId);
if (this.balancer.contains(database))
{
throw new IllegalStateException(Messages.DATABASE_STILL_ACTIVE.getMessage(this, databaseId));
}
this.configuration.getMBeanRegistrar().unregister(this, database);
this.configuration.getDatabaseMap().remove(databaseId);
for (DatabaseClusterConfigurationListener listener: this.configurationListeners)
{
listener.removed(database, this.configuration);
}
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getId()
*/
@ManagedAttribute
@Override
public String getId()
{
return this.id;
}
@Override
public String toString()
{
return this.id;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#isActive()
*/
@ManagedAttribute
@Override
public boolean isActive()
{
return this.active;
}
@Override
public void changeState(NodeState oldState, NodeState newState) {
if(NodeState.host.equals(newState)){
recoverDatabase();
}
Iterator iterator = nodeStateListeners.iterator();
while (iterator.hasNext()){
NodeStateListener listener = iterator.next();
this.executor.submit(()->{
try {
listener.changeState(oldState, newState);
}catch (Exception e){
logger.log(Level.WARN,e);
}
});
}
}
/**
* Returns the set of synchronization strategies available to this cluster.
* @return a set of synchronization strategy identifiers
*/
@ManagedAttribute
public Set getSynchronizationStrategies()
{
return new TreeSet(this.configuration.getSynchronizationStrategyMap().keySet());
}
/**
* Returns the default synchronization strategy used by this cluster.
* @return a synchronization strategy identifier
*/
@ManagedAttribute
public String getDefaultSynchronizationStrategy()
{
return this.configuration.getDefaultSynchronizationStrategy();
}
/**
* Flushes this cluster's cache of DatabaseMetaData.
*/
@ManagedOperation
@Description("Flushes this cluster's cache of database meta data")
public void flushMetaDataCache()
{
try
{
this.databaseMetaDataCache.flush();
}
catch (SQLException e)
{
throw new IllegalStateException(e.toString(), e);
}
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#addConfigurationListener(net.sf.hajdbc.DatabaseClusterConfigurationListener)
*/
@ManagedOperation
@Override
public void addConfigurationListener(DatabaseClusterConfigurationListener listener)
{
this.configurationListeners.add(listener);
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#addListener(net.sf.hajdbc.DatabaseClusterListener)
*/
@ManagedOperation
@Override
public void addListener(DatabaseClusterListener listener)
{
this.clusterListeners.add(listener);
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#addSynchronizationListener(net.sf.hajdbc.SynchronizationListener)
*/
@ManagedOperation
@Override
public void addSynchronizationListener(SynchronizationListener listener)
{
this.synchronizationListeners.add(listener);
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#removeConfigurationListener(net.sf.hajdbc.DatabaseClusterConfigurationListener)
*/
@ManagedOperation
@Override
public void removeConfigurationListener(DatabaseClusterConfigurationListener listener)
{
this.configurationListeners.remove(listener);
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#removeListener(net.sf.hajdbc.DatabaseClusterListener)
*/
@ManagedOperation
@Override
public void removeListener(DatabaseClusterListener listener)
{
this.clusterListeners.remove(listener);
}
@Override
public void addListener(NodeStateListener listener) {
nodeStateListeners.add(listener);
}
@Override
public void removeListener(NodeStateListener listener) {
nodeStateListeners.remove(listener);
}
@Override
public void addListener(NodeDatabaseRestoreListener listener) {
nodeDatabaseRestoreListeners.add(listener);
}
@Override
public void removeListener(NodeDatabaseRestoreListener listener) {
nodeDatabaseRestoreListeners.remove(listener);
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#removeSynchronizationListener(net.sf.hajdbc.SynchronizationListener)
*/
@ManagedOperation
@Override
public void removeSynchronizationListener(SynchronizationListener listener)
{
this.synchronizationListeners.remove(listener);
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#activate(net.sf.hajdbc.Database, net.sf.hajdbc.state.StateManager)
*/
@Override
public boolean activate(D database, StateManager manager)
{
boolean added = this.balancer.add(database);
if (added)
{
database.setActive(true);
if (database.isDirty())
{
database.clean();
}
DatabaseEvent event = new DatabaseEvent(database);
manager.activated(event);
for (DatabaseClusterListener listener: this.clusterListeners)
{
listener.activated(event);
}
}
return added;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#deactivate(net.sf.hajdbc.Database, net.sf.hajdbc.state.StateManager)
*/
@Override
public boolean deactivate(D database, StateManager manager)
{
if(Tracer.db_state.isTrace()){
logger.log(Level.WARN, new Exception("trace db_state"),"deactivate {0}", database.getId());
}
boolean removed = this.balancer.remove(database);
if (removed)
{
database.setActive(false);
DatabaseEvent event = new DatabaseEvent(database);
manager.deactivated(event);
for (DatabaseClusterListener listener: this.clusterListeners)
{
listener.deactivated(event);
}
}
return removed;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getBalancer()
*/
@Override
public Balancer getBalancer()
{
return this.balancer;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getDatabase(java.lang.String)
*/
@Override
public D getDatabase(String id)
{
D database = this.configuration.getDatabaseMap().get(id);
if (database == null)
{
throw new IllegalArgumentException(Messages.INVALID_DATABASE.getMessage(this, id));
}
return database;
}
@Override
public D getDatabaseByIp(String ip) {
D find = null;
Iterator iterator = this.configuration.getDatabaseMap().values().iterator();
while(iterator.hasNext()){
D next = iterator.next();
if(next.getIp().equals(ip)){
find = next;
break;
}
}
return find;
}
@Override
public void addDatabase(D database) {
this.configuration.getDatabaseMap().putIfAbsent(database.getId(),database);
}
private void checkLocalDb() throws InterruptedException {
while(this.localDbId==null) {
for (D db : this.configuration.getDatabaseMap().values()) {
if (LocalHost.getAllIp().contains(db.getIp())) {
this.localDbId = db.getId();
db.setLocal(true);
break;
}
}
logger.log(Level.WARN,"checkLocalDb not find local db. all db: {0}",this.configuration.getDatabaseMap().values());
Thread.sleep(1000);
}
}
/**
*
* @see DatabaseCluster#getLocalDatabase()
*/
@Override
public synchronized D getLocalDatabase() {
D local = null;
try {
checkLocalDb();
} catch (InterruptedException e) {
//ignore InterruptedException
}
if(localDbId!=null) {
Iterator iterator = this.configuration.getDatabaseMap().values().iterator();
while (iterator.hasNext()) {
D database = iterator.next();
if (database.getId().equals(localDbId)) {
local = database;
break;
}
}
}
return local;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getDatabaseMetaDataCache()
*/
@Override
public DatabaseMetaDataCache getDatabaseMetaDataCache()
{
return this.databaseMetaDataCache;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getDialect()
*/
@Override
public Dialect getDialect()
{
return this.dialect;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getDurability()
*/
@Override
public Durability getDurability()
{
return this.durability;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getLockManager()
*/
@Override
public LockManager getLockManager()
{
return this.lockManager;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getExecutor()
*/
@Override
public ExecutorService getExecutor()
{
return this.executor;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getTransactionMode()
*/
@Override
public TransactionMode getTransactionMode()
{
return this.configuration.getTransactionMode();
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getStateManager()
*/
@Override
public StateManager getStateManager()
{
return this.stateManager;
}
@Override
public ClusterHealth getClusterHealth() {
if(stateManager instanceof DistributedStateManager) {
return ((DistributedStateManager) stateManager).getHealth();
}
return null;
}
@Override
public DistributedManager getDistributedManager() {
if(stateManager instanceof DistributedManager) {
return ((DistributedManager) stateManager);
}
return null;
}
@Override
public ThreadFactory getThreadFactory()
{
return this.configuration.getThreadFactory();
}
@Override
public Decoder getDecoder()
{
return this.decoder;
}
@Override
public InputSinkStrategy getInputSinkStrategy()
{
return this.sinkSourceFactory;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#getTransactionIdentifierFactory()
*/
@Override
public TransactionIdentifierFactory getTransactionIdentifierFactory()
{
return this.configuration.getTransactionIdentifierFactory();
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#isCurrentDateEvaluationEnabled()
*/
@Override
public boolean isCurrentDateEvaluationEnabled()
{
return this.configuration.isCurrentDateEvaluationEnabled();
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#isCurrentTimeEvaluationEnabled()
*/
@Override
public boolean isCurrentTimeEvaluationEnabled()
{
return this.configuration.isCurrentTimeEvaluationEnabled();
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#isCurrentTimestampEvaluationEnabled()
*/
@Override
public boolean isCurrentTimestampEvaluationEnabled()
{
return this.configuration.isCurrentTimestampEvaluationEnabled();
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#isIdentityColumnDetectionEnabled()
*/
@Override
public boolean isIdentityColumnDetectionEnabled()
{
return this.configuration.isIdentityColumnDetectionEnabled();
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#isRandEvaluationEnabled()
*/
@Override
public boolean isRandEvaluationEnabled()
{
return this.configuration.isRandEvaluationEnabled();
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.DatabaseCluster#isSequenceDetectionEnabled()
*/
@Override
public boolean isSequenceDetectionEnabled()
{
return this.configuration.isSequenceDetectionEnabled();
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.Lifecycle#start()
*/
@Override
public synchronized void start() throws Exception
{
if (this.active) {
return;
}
this.decoder = this.configuration.getDecoderFactory().createDecoder(this.id);
this.lockManager = this.configuration.getLockManagerFactory().createLockManager();
this.stateManager = this.configuration.getStateManagerFactory().createStateManager(this);
CommandDispatcherFactory dispatcherFactory = this.configuration.getDispatcherFactory();
if (dispatcherFactory != null)
{
this.lockManager = new DistributedLockManager(this, dispatcherFactory);
this.stateManager = new DistributedStateManager(this, dispatcherFactory);
}
this.balancer = this.configuration.getBalancerFactory().createBalancer(new TreeSet());
this.dialect = this.configuration.getDialectFactory().createDialect();
this.durability = this.configuration.getDurabilityFactory().createDurability(this);
this.executor = this.configuration.getExecutorProvider().getExecutor(this.configuration.getThreadFactory());
this.sinkSourceFactory = this.configuration.getInputSinkProvider().createInputSinkStrategy();
this.lockManager.start();
this.stateManager.start();
if(this.getLocalDatabase()!=null) {
recoverDatabase();
scheduleDetection();
registerMBean();
this.active = true;
}
}
/**
* Recover all active databases.
*/
private void recoverDatabase() {
Set databases = this.stateManager.getActiveDatabases();
logger.log(Level.INFO, "Recover all active databases. databases={0}", databases);
if (!databases.isEmpty())
{
for (String databaseId: databases)
{
D database = this.getDatabase(databaseId);
if (database != null)
{
this.balancer.add(database);
database.setActive(true);
}
else
{
logger.log(Level.WARN, Messages.DATABASE_IGNORED.getMessage(), this, databaseId);
}
}
}
else
{
for (D database: this.configuration.getDatabaseMap().values())
{
if (this.isAlive(database, Level.WARN))
{
this.activate(database, this.stateManager);
}
}
}
Map> invokers = this.stateManager.recover();
if (!invokers.isEmpty())
{
this.durability.recover(invokers);
}
this.databaseMetaDataCache = this.configuration.getDatabaseMetaDataCacheFactory().createCache(this);
try
{
this.flushMetaDataCache();
}
catch (IllegalStateException e)
{
// Ignore - cache will initialize lazily.
}
}
/**
* Schedule failure and activation detection
*/
private void scheduleDetection() {
CronExpression failureDetectionExpression = this.configuration.getFailureDetectionExpression();
CronExpression autoActivationExpression = this.configuration.getAutoActivationExpression();
int threads = requiredThreads(failureDetectionExpression) + requiredThreads(autoActivationExpression);
if (threads > 0)
{
this.cronExecutor = new CronThreadPoolExecutor(threads, this.configuration.getThreadFactory());
if (failureDetectionExpression != null)
{
this.cronExecutor.schedule(new FailureDetectionTask(), failureDetectionExpression);
}
if (autoActivationExpression != null)
{
this.cronExecutor.schedule(new AutoActivationTask(), autoActivationExpression);
}
}
}
private void registerMBean() throws JMException {
MBeanRegistrar registrar = this.configuration.getMBeanRegistrar();
if (registrar != null)
{
registrar.register(this);
for (D database: this.configuration.getDatabaseMap().values())
{
registrar.register(this, database);
}
}
}
private static int requiredThreads(CronExpression expression)
{
return (expression != null) ? 1 : 0;
}
/**
* {@inheritDoc}
* @see net.sf.hajdbc.Lifecycle#stop()
*/
@SuppressWarnings("AlibabaRemoveCommentedCode")
@Override
public synchronized void stop()
{
this.active = false;
/* Don't do this until we can distinguish between embedded databases, and local databases in a separate processes
if (this.balancer != null)
{
// Proactively deactivate any local databases
for (D database: this.balancer)
{
if (database.isLocal())
{
this.deactivate(database, this.stateManager);
}
}
}
*/
MBeanRegistrar registrar = this.configuration.getMBeanRegistrar();
if (registrar != null)
{
registrar.unregister(this);
for (D database: this.configuration.getDatabaseMap().values())
{
registrar.unregister(this, database);
}
}
if (this.cronExecutor != null)
{
this.cronExecutor.shutdownNow();
}
if (this.stateManager != null)
{
this.stateManager.stop();
}
if (this.lockManager != null)
{
this.lockManager.stop();
}
if (this.executor != null)
{
this.executor.shutdownNow();
}
if (this.balancer != null)
{
this.balancer.clear();
}
}
@Override
public boolean isAlive(D database, Level level)
{
try
{
Connection connection = database.getDetectConnection(this.decoder);
return this.dialect.isValid(connection);
}catch (Exception e)
{
logger.log(level, e.getMessage());
return false;
}
}
@Override
public int getNodeCount() {
return configuration.getDatabaseMap().size();
}
@Override
public SyncMgr getSyncMgr() {
if(stateManager instanceof DistributedStateManager) {
return ((DistributedStateManager) stateManager).getSyncMgr();
}
return null;
}
@Override
public List getNodes() {
List nodes = new ArrayList<>();
for (D db : configuration.getDatabaseMap().values()) {
nodes.add(db.getIp());
}
return nodes;
}
@Override
public void checkActiveDatabases(Set activeDatabases) {
Set databases = stateManager.getActiveDatabases();
for(String db : activeDatabases){
logger.log(Level.INFO,"active database: {0}.", db);
D database = getDatabase(db);
boolean add = this.balancer.add(database);
if(add){
logger.log(Level.INFO,"database {0} is add.", db);
database.setActive(true);
}
}
}
boolean activate(D database, SynchronizationStrategy strategy) throws SQLException, InterruptedException {
synchronized (database) {
if (!this.isAlive(database, Level.INFO) || !stateManager.isValid(database)) {
return false;
}
if(!database.isLocal()){
//远程节点需要状态正常才允许激活
Member find = getDistributedManager().getMember(database.getIp());
if (find != null) {
NodeHealth nodeHealth = this.getClusterHealth().getNodeHealth(find);
if (nodeHealth == null || nodeHealth.getState() == null || NodeState.offline.equals(nodeHealth.getState())) {
return false;
}
} else {
return false;
}
}else{
//本地节点需要状态正常才允许激活
if(NodeState.offline.equals(this.getClusterHealth().getState())){
return false;
}
}
if(Tracer.db_state.isTrace()){
logger.log(Level.WARN, new Exception("trace db_state"),"activate {0}", database.getId());
}
StopWatch stopWatch = StopWatch.createStarted();
Lock lock = this.lockManager.writeLock(null);
lock.lockInterruptibly();
try {
if (this.balancer.contains(database)) {
return false;
}
if (!this.balancer.isEmpty()) {
SynchronizationContext context = new SynchronizationContextImpl(this, database);
try {
DatabaseEvent event = new DatabaseEvent(database);
logger.log(Level.INFO, Messages.DATABASE_SYNC_START.getMessage(this, database));
for (SynchronizationListener listener : this.synchronizationListeners) {
listener.beforeSynchronization(event);
}
strategy.synchronize(context);
logger.log(Level.INFO, Messages.DATABASE_SYNC_END.getMessage(this, database));
for (SynchronizationListener listener : this.synchronizationListeners) {
listener.afterSynchronization(event);
}
} finally {
context.close();
}
}
return this.activate(database, this.stateManager);
} finally {
lock.unlock();
stopWatch.stop();
logger.log(Level.INFO, "db activate lock time {0}", stopWatch.toString());
}
}
}
class FailureDetectionTask implements Runnable
{
@Override
public void run() {
try {
if (!DatabaseClusterImpl.this.getClusterHealth().isHost()) {
return;
}
Set databases = DatabaseClusterImpl.this.getBalancer();
int size = databases.size();
if ((size > 1) || DatabaseClusterImpl.this.configuration.isEmptyClusterAllowed()) {
List deadList = new ArrayList(size);
for (D database : databases) {
boolean alive = DatabaseClusterImpl.this.isAlive(database, Level.WARN);
boolean valid = stateManager.isValid(database);
if(Tracer.db_state.isTrace()){
logger.log(Level.INFO, "db {0} alive={1}, valid={2}", database.getIp(), alive, valid);
}
if (!alive||!valid) {
deadList.add(database);
}
}
if ((deadList.size() < size) || DatabaseClusterImpl.this.configuration
.isEmptyClusterAllowed()) {
for (D database : deadList) {
if (DatabaseClusterImpl.this
.deactivate(database, DatabaseClusterImpl.this.getStateManager())) {
logger.log(Level.ERROR, Messages.DATABASE_DEACTIVATED.getMessage(), database,
DatabaseClusterImpl.this);
}
}
}
}
}catch(Exception e){
logger.log(Level.WARN,e);
}
}
}
class AutoActivationTask implements Runnable
{
@Override
public void run()
{
try
{
if (!DatabaseClusterImpl.this.getClusterHealth().isHost()) {
return;
}
Set activeDatabases = DatabaseClusterImpl.this.getBalancer();
if (!activeDatabases.isEmpty())
{
for (D database: DatabaseClusterImpl.this.configuration.getDatabaseMap().values())
{
if(!activeDatabases.contains(database)) {
try {
if (DatabaseClusterImpl.this.activate(database, DatabaseClusterImpl.this.configuration.getSynchronizationStrategyMap().get(DatabaseClusterImpl.this.configuration.getDefaultSynchronizationStrategy()))) {
logger.log(Level.INFO, Messages.DATABASE_ACTIVATED.getMessage(), database, DatabaseClusterImpl.this);
}
} catch (SQLException e) {
logger.log(Level.WARN, e);
}
}
}
}
}
catch (InterruptedException e)
{
logger.log(Level.WARN,e);
}
}
}
}
