Examples of java.security.PrivilegedExceptionAction

java.security.PrivilegedExceptionAction
A computation to be performed with privileges enabled, that throws one or more checked exceptions. The computation is performed by invoking AccessController.doPrivileged on the PrivilegedExceptionAction object. This interface is used only for computations that throw checked exceptions; computations that do not throw checked exceptions should use PrivilegedAction instead. @see AccessController @see AccessController#doPrivileged(PrivilegedExceptionAction) @see AccessController#doPrivileged(PrivilegedExceptionAction,AccessControlContext) @see PrivilegedAction

        if (comBufferTraceOn == false) {
          // The writer will be buffered for effeciency.
            try {
                
                comBufferWriter =  ((PrintWriter)AccessController.doPrivileged(
                            new PrivilegedExceptionAction() {
                                public Object run() throws SecurityException, IOException {
                                    return new  PrintWriter (new java.io.BufferedWriter (new java.io.FileWriter (fileName), 4096));
                                }
                            }));
            } catch (PrivilegedActionException pae) {

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    }


    private void init(byte [] b, long len)
                    throws IOException, SQLException, StandardException {
        try {
            AccessController.doPrivileged (new PrivilegedExceptionAction() {
                public Object run() throws IOException, StandardException {
                    Object monitor = Monitor.findService(
                            Property.DATABASE_MODULE, dbName);
                    DataFactory df =  (DataFactory) Monitor.findServiceModule(
                            monitor, DataFactory.MODULE);

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    }


    private void deleteFile (StorageFile file) throws IOException {
        try {
            final StorageFile sf = file;
            AccessController.doPrivileged(new PrivilegedExceptionAction() {
                public Object run() throws IOException {
                    sf.delete();
                    return null;
                }
            });

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        throws StandardException, IOException
    {
        try
        {
            return (StorageFactory) AccessController.doPrivileged(
                new PrivilegedExceptionAction()
                {
                    public Object run() throws InstantiationException, IllegalAccessException, IOException
                    {
                        return privGetStorageFactoryInstance( useHome, databaseName, tempDirName, uniqueName);
                    }

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        final Properties serviceProperties = new Properties(defaultProperties);
    try
        {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction()
                {
                    public Object run()
                        throws IOException, StandardException,
                        InstantiationException, IllegalAccessException
                    {

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            throw StandardException.newException(SQLState.READ_ONLY_SERVICE);
        final WritableStorageFactory storageFactory = (WritableStorageFactory) sf;
        try
        {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction()
                {
                    public Object run() throws StandardException
                    {
                        StorageFile backupFile = null;
                        StorageFile servicePropertiesFile = storageFactory.newStorageFile( PersistentService.PROPERTIES_NAME);

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    throws StandardException {


        try
        {
            AccessController.doPrivileged(
                new PrivilegedExceptionAction()
                {
                    File backupFile = null;
                    public Object run() throws StandardException
                    {

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          //and the device on which data directorties existied has
          //failed and user is trying to restore it some other device.
                    try
                    {
                        if( AccessController.doPrivileged(
                                new PrivilegedExceptionAction()
                                {
                                    public Object run()
                                        throws IOException, StandardException, InstantiationException, IllegalAccessException
                                    {
                                        StorageFactory storageFactory
                                          = privGetStorageFactoryInstance( true, serviceName, null, null);
                                        try
                                        {
                                            StorageFile serviceDirectory = storageFactory.newStorageFile( null);
                                            return serviceDirectory.exists() ? this : null;
                                        }
                                        finally {storageFactory.shutdown();}
                                    }
                                }
                                ) == null)
                        {
                            createRoot =true;
                            deleteExistingRoot = false;
                        }
                        
                    }
                    catch( PrivilegedActionException pae)
                    {
                        throw Monitor.exceptionStartingModule( (IOException) pae.getException());
                    }
        }
      }
    }


    //restore the service properties from backup
    if(restoreFrom != null)
    {
      //First make sure backup service directory exists in the specified path
      File backupRoot = new File(restoreFrom);
      if (fileExists(backupRoot))
      {
        //First make sure backup have service.properties
        File bserviceProp = new File(restoreFrom, PersistentService.PROPERTIES_NAME);
        if(fileExists(bserviceProp))
        {
          //create service root if required
          if(createRoot)
            createServiceRoot(serviceName, deleteExistingRoot);
                    try
                    {
                        AccessController.doPrivileged(
                            new PrivilegedExceptionAction()
                            {
                                public Object run()
                                    throws IOException, StandardException, InstantiationException, IllegalAccessException
                                {
                                    WritableStorageFactory storageFactory =

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    Throwable t = null;
        try
        {
            return getProtocolLeadIn() + (String) AccessController.doPrivileged(
                new PrivilegedExceptionAction()
                {
                    public Object run()
                        throws StandardException, IOException, InstantiationException, IllegalAccessException
                    {
                        StorageFactory storageFactory = privGetStorageFactoryInstance( true, name, null, null);

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        if( !( rootStorageFactory instanceof WritableStorageFactory))
            return false;
        try
        {
            return AccessController.doPrivileged(
                new PrivilegedExceptionAction()
                {
                    public Object run()
                        throws StandardException, IOException, InstantiationException, IllegalAccessException
                    {
                        StorageFactory storageFactory = privGetStorageFactoryInstance( true, serviceName, null, null);

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