//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public final org.neo4j.helpers.collection.Pair<java.io.File, KeyValueStoreFile> open() throws java.io.IOException
public Pair <File, KeyValueStoreFile> Open()
{
KeyValueStoreFile result = null;
File path = null;
foreach (File candidatePath in CandidateFiles())
{
KeyValueStoreFile file;
if (Fs.fileExists(candidatePath))
{
try
{
file = _format.openStore(Fs, Pages, candidatePath);
}
catch (Exception e)
{
_monitor.failedToOpenStoreFile(candidatePath, e);
continue;
}
if (result == null || _format.compareHeaders(result.Headers(), file.Headers()) < 0)
{
if (result != null)
{
result.Dispose();
}
result = file;
path = candidatePath;
}
else
{
file.Dispose();
}
}
}
return(result == null ? null : Pair.of(path, result));
}
//JAVA TO C# CONVERTER TODO TASK: Most Java annotations will not have direct .NET equivalent attributes:
//ORIGINAL LINE: @Test public void shouldNotPickCorruptStoreFile() throws Exception
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
public virtual void ShouldNotPickCorruptStoreFile()
{
// given
Store store = CreateTestStore();
RotationStrategy rotation = store.RotationStrategy;
// when
File[] files = new File[10];
{
Pair <File, KeyValueStoreFile> file = rotation.Create(EMPTY_DATA_PROVIDER, 1);
files[0] = file.First();
for (int txId = 2, i = 1; i < Files.Length; txId <<= 1, i++)
{
KeyValueStoreFile old = file.Other();
//JAVA TO C# CONVERTER WARNING: The original Java variable was marked 'final':
//ORIGINAL LINE: final int data = txId;
int data = txId;
file = rotation.Next(file.First(), Headers.HeadersBuilder().put(TX_ID, (long)txId).headers(), data((Entry)(key, value) =>
{
key.putByte(0, ( sbyte )'f');
key.putByte(1, ( sbyte )'o');
key.putByte(2, ( sbyte )'o');
value.putInt(0, data);
}));
old.Dispose();
files[i] = file.First();
}
file.Other().Dispose();
}
// Corrupt the last files
using (StoreChannel channel = _resourceManager.fileSystem().open(files[9], OpenMode.READ_WRITE))
{ // ruin the header
channel.Position(16);
ByteBuffer value = ByteBuffer.allocate(16);
value.put(( sbyte )0);
value.flip();
channel.WriteAll(value);
}
using (StoreChannel channel = _resourceManager.fileSystem().open(files[8], OpenMode.READ_WRITE))
{ // ruin the header
channel.Position(32);
ByteBuffer value = ByteBuffer.allocate(16);
value.put(( sbyte )17);
value.flip();
channel.WriteAll(value);
}
using (StoreChannel channel = _resourceManager.fileSystem().open(files[7], OpenMode.READ_WRITE))
{ // ruin the header
channel.Position(32 + 32 + 32 + 16);
ByteBuffer value = ByteBuffer.allocate(16);
value.putLong(0);
value.putLong(0);
value.flip();
channel.WriteAll(value);
}
// then
using (Lifespan life = new Lifespan())
{
life.Add(store);
assertEquals(64L, store.Headers().get(TX_ID).longValue());
}
}