//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldTruncateTheFileIfOverwriting() throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void ShouldTruncateTheFileIfOverwriting()
{
// GIVEN
IdContainer.CreateEmptyIdFile(_fs, _file, 30, false);
IdContainer idContainer = new IdContainer(_fs, _file, 5, false);
idContainer.Init();
for (int i = 0; i < 17; i++)
{
idContainer.FreeId(i);
}
idContainer.Close(30);
assertThat(( int )_fs.getFileSize(_file), greaterThan(IdContainer.HeaderSize));
// WHEN
IdContainer.CreateEmptyIdFile(_fs, _file, 30, false);
// THEN
assertEquals(IdContainer.HeaderSize, ( int )_fs.getFileSize(_file));
assertEquals(30, IdContainer.ReadHighId(_fs, _file));
idContainer = new IdContainer(_fs, _file, 5, false);
idContainer.Init();
assertEquals(30, idContainer.InitialHighId);
idContainer.Close(30);
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldForceStickyMark() throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void ShouldForceStickyMark()
{
// GIVEN
CreateEmptyFile();
// WHEN opening the id generator, where the jvm crashes right after
IdContainer idContainer = new IdContainer(_fs, _file, 100, false);
idContainer.Init();
// THEN
try
{
IdContainer.ReadHighId(_fs, _file);
fail("Should have thrown, saying something with sticky generator");
}
catch (InvalidIdGeneratorException)
{
// THEN Good
}
finally
{
idContainer.Close(0);
}
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldReturnFalseOnInitIfTheFileWasCreated()
public virtual void ShouldReturnFalseOnInitIfTheFileWasCreated()
{
// When
// An IdContainer is created with no underlying file
IdContainer idContainer = new IdContainer(_fs, _file, 100, false);
// Then
// Init should return false
assertFalse(idContainer.Init());
idContainer.Close(100);
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void idContainerReadWriteBySingleByte() throws java.io.IOException
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void IdContainerReadWriteBySingleByte()
{
SingleByteFileSystemAbstraction fileSystem = new SingleByteFileSystemAbstraction();
IdContainer idContainer = new IdContainer(fileSystem, _file, 100, false);
idContainer.Init();
idContainer.Close(100);
idContainer = new IdContainer(fileSystem, _file, 100, false);
idContainer.Init();
assertEquals(100, idContainer.InitialHighId);
fileSystem.Dispose();
idContainer.Close(100);
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void includeFileNameIntoReadHeaderException() throws java.io.IOException
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void IncludeFileNameIntoReadHeaderException()
{
CreateEmptyFile();
_fs.truncate(_file, 0);
try
{
IdContainer idContainer = new IdContainer(_fs, _file, 100, false);
idContainer.Init();
}
catch (InvalidIdGeneratorException e)
{
assertThat(e.Message, Matchers.containsString(_file.AbsolutePath));
}
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldDeleteIfClosed()
public virtual void ShouldDeleteIfClosed()
{
// GIVEN
CreateEmptyFile();
IdContainer idContainer = new IdContainer(_fs, _file, 100, false);
idContainer.Init();
idContainer.Close(0);
// WHEN
idContainer.Delete();
// THEN
assertFalse(_fs.fileExists(_file));
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldReturnTrueOnInitIfAProperFileWasThere()
public virtual void ShouldReturnTrueOnInitIfAProperFileWasThere()
{
// Given
// A properly created and closed id file
IdContainer idContainer = new IdContainer(_fs, _file, 100, false);
idContainer.Init();
idContainer.Close(100);
// When
// An IdContainer is created over it
idContainer = new IdContainer(_fs, _file, 100, false);
// Then
// init() should return true
assertTrue(idContainer.Init());
idContainer.Close(100);
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void constructorShouldNotCallHighIdSupplierOnCleanIdFile()
public virtual void ConstructorShouldNotCallHighIdSupplierOnCleanIdFile()
{
// Given
// A non empty, clean id file
IdContainer.CreateEmptyIdFile(Fsr.get(), _file, 42, true);
// and a mock supplier to test against
System.Func <long> highId = mock(typeof(System.Func <long>));
// When
// An IdGenerator is created over the previous properly closed file
IdGenerator idGenerator = new IdGeneratorImpl(Fsr.get(), _file, 100, 100, false, IdType.Node, highId);
idGenerator.Dispose();
// Then
// The supplier must have remained untouched
verifyZeroInteractions(highId);
}
/// <summary>
/// Opens the id generator represented by <CODE>fileName</CODE>. The
/// <CODE>grabSize</CODE> means how many defragged ids we should keep in
/// memory and is also the size (x4) of the two buffers used for reading and
/// writing to the id generator file. The highest returned id will be read
/// from file and if <CODE>grabSize</CODE> number of ids exist they will be
/// read into memory (if less exist all defragged ids will be in memory).
/// <para>
/// If this id generator hasn't been closed properly since the previous
/// session (sticky) an <CODE>IOException</CODE> will be thrown. When this
/// happens one has to rebuild the id generator from the (node/rel/prop)
/// store file.
///
/// </para>
/// </summary>
/// <param name="file">
/// The file name (and path if needed) for the id generator to be
/// opened </param>
/// <param name="grabSize">
/// The number of defragged ids to keep in memory </param>
/// <param name="max"> is the highest possible id to be returned by this id generator from
/// <seealso cref="nextId()"/>. </param>
/// <param name="aggressiveReuse"> will reuse ids during the same session, not requiring
/// a restart to be able reuse ids freed with <seealso cref="freeId(long)"/>. </param>
/// <param name="highId"> A supplier for the high id to be used if the id file is found to be empty or not properly shut down </param>
/// <exception cref="UnderlyingStorageException">
/// If no such file exist or if the id generator is sticky </exception>
public IdGeneratorImpl(FileSystemAbstraction fs, File file, int grabSize, long max, bool aggressiveReuse, IdType idType, System.Func <long> highId)
{
this._max = max;
this._idType = idType;
this._idContainer = new IdContainer(fs, file, grabSize, aggressiveReuse);
/*
* The highId supplier will be called only if the id container tells us that the information found in the
* id file is not reliable (typically the file had to be created). Calling the supplier can be a potentially
* expensive operation.
*/
if (this._idContainer.init())
{
this._highId = _idContainer.InitialHighId;
}
else
{
this._highId = highId();
}
}
private void CreateEmptyFile()
{
IdContainer.CreateEmptyIdFile(_fs, _file, 42, false);
}
/// <summary>
/// Read the defragmented id count from the given id-file.
///
/// Note that this method should only be used when the file is not currently in use by an IdGenerator, since this
/// method does not take any in-memory state into account.
/// </summary>
/// <param name="fileSystem"> The file system to use for accessing the given file. </param>
/// <param name="file"> The path to the id-file from which to read the defrag count. </param>
/// <returns> The number of defragmented ids in the id-file. </returns>
/// <exception cref="IOException"> If anything goes wrong when accessing the file, for instance if the file does not exist. </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public static long readDefragCount(org.neo4j.io.fs.FileSystemAbstraction fileSystem, java.io.File file) throws java.io.IOException
public static long ReadDefragCount(FileSystemAbstraction fileSystem, File file)
{
return(IdContainer.ReadDefragCount(fileSystem, file));
}
/// <summary>
/// Read the high-id count from the given id-file.
///
/// Note that this method should only be used when the file is not currently in use by an IdGenerator, since this
/// method does not take any in-memory state into account.
/// </summary>
/// <param name="fileSystem"> The file system to use for accessing the given file. </param>
/// <param name="file"> The path to the id-file from which to read the high-id. </param>
/// <returns> The high-id from the given file. </returns>
/// <exception cref="IOException"> If anything goes wrong when accessing the file, for instance if the file does not exist. </exception>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public static long readHighId(org.neo4j.io.fs.FileSystemAbstraction fileSystem, java.io.File file) throws java.io.IOException
public static long ReadHighId(FileSystemAbstraction fileSystem, File file)
{
return(IdContainer.ReadHighId(fileSystem, file));
}
/// <summary>
/// Creates a new id generator.
/// </summary>
/// <param name="fileName"> The name of the id generator </param>
/// <param name="throwIfFileExists"> if {@code true} will cause an <seealso cref="UnderlyingStorageException"/> to be thrown if
/// the file already exists. if {@code false} will truncate the file writing the header in it. </param>
public static void CreateGenerator(FileSystemAbstraction fs, File fileName, long highId, bool throwIfFileExists)
{
IdContainer.CreateEmptyIdFile(fs, fileName, highId, throwIfFileExists);
}
