Examples of com.cloud.utils.db.GlobalLock.lock()

com.cloud.utils.db.GlobalLock.lock()

    @Override
    public void cleanupStorage(boolean recurring) {
        GlobalLock scanLock = GlobalLock.getInternLock("storagemgr.cleanup");


        try {
            if (scanLock.lock(3)) {
                try {
                    // Cleanup primary storage pools
                    if (_templateCleanupEnabled) {
                        List<StoragePoolVO> storagePools = _storagePoolDao.listAll();
                        for (StoragePoolVO pool : storagePools) {

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    public class NetworkGarbageCollector implements Runnable {
        @Override
        public void run() {
            GlobalLock gcLock = GlobalLock.getInternLock("Network.GC.Lock");
            try {
                if(gcLock.lock(3)) {
                    try {
                        reallyRun();
                    } finally {
                        gcLock.unlock();
                    }

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    protected void cancelWorkItems(long nodeId) {
        GlobalLock scanLock = GlobalLock.getInternLock("vmmgr.cancel.workitem");


        try {
            if (scanLock.lock(3)) {
                try {
                    List<ItWorkVO> works = _workDao.listWorkInProgressFor(nodeId);
                    for (ItWorkVO work : works) {
                        s_logger.info("Handling unfinished work item: " + work);
                        try {

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            if (lock == null) {
                s_logger.debug("Couldn't get the global lock");
                return;
            }


            if (!lock.lock(30)) {
                s_logger.debug("Couldn't lock the db");
                return;
            }
            try {
                lock.addRef();

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  @Override
  public void check() {
    GlobalLock lock = GlobalLock.getInternLock("DatabaseIntegrity");
        try {
            s_logger.info("Grabbing lock to check for database integrity.");
            if (!lock.lock(20 * 60)) {
                throw new CloudRuntimeException("Unable to acquire lock to check for database integrity.");
            }


            try {
                s_logger.info("Performing database integrity check");

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        // We don't maintain the time. The timer task does.
        _currentTimestamp = currentTimestamp;


        GlobalLock scanLock = GlobalLock.getInternLock("snapshot.poll");
        try {
            if(scanLock.lock(ACQUIRE_GLOBAL_LOCK_TIMEOUT_FOR_COOPERATION)) {
                try {
                    checkStatusOfCurrentlyExecutingSnapshots();
                } finally {
                    scanLock.unlock();
                }

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            scanLock.releaseRef();
        }


        scanLock = GlobalLock.getInternLock("snapshot.poll");
        try {
            if(scanLock.lock(ACQUIRE_GLOBAL_LOCK_TIMEOUT_FOR_COOPERATION)) {
                try {
                    scheduleSnapshots();
                } finally {
                    scanLock.unlock();
                }

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    @Override
    public void check() {
        GlobalLock lock = GlobalLock.getInternLock("DatabaseUpgrade");
        try {
            s_logger.info("Grabbing lock to check for database upgrade.");
            if (!lock.lock(20 * 60)) {
                throw new CloudRuntimeException("Unable to acquire lock to check for database integrity.");
            }


            try {
                String dbVersion = _dao.getCurrentVersion();

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                return false;
            }


            GlobalLock scanLock = GlobalLock.getInternLock("direct.network.usage.collect"+host.getDataCenterId());
            try {
                if (scanLock.lock(10)) {
                    try {
                        return collectDirectNetworkUsage(host);
                    } finally {
                        scanLock.unlock();
                    }

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        // add lock to make template sync for a data store only be done once
        String lockString = "templatesync.storeId:" + storeId;
        GlobalLock syncLock = GlobalLock.getInternLock(lockString);
        try {
            if (syncLock.lock(3)) {
                try{
                    Long zoneId = store.getScope().getScopeId();


                    Map<String, TemplateProp> templateInfos = listTemplate(store);
                    if (templateInfos == null) {

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