/// <summary>
/// Initializes a new instance of the <see cref="PhysicalDatabase"/> class.
/// </summary>
/// <param name="journal">The journal.</param>
public unsafe PhysicalDatabase(IJournal journal, Caching.BlockCache cache, JournalRecovery recovery)
{
this.journal = journal;
this.journal.Startup(cache, recovery);
// Must make sure we construct the first node if not already there ("default node").
Block block = journal.ReadService.Read(BlockType.NoCache, 0);
fixed(byte *p = block.Data)
{
DatabaseHeader *header = (DatabaseHeader *)p;
rootAddress = header->RootObjectAddress;
}
// We must initialize it.
if (rootAddress == 0)
{
journal.Execute(new Operations.CreateRootObject());
block = journal.ReadService.Read(BlockType.NoCache, 0);
fixed(byte *pp = block.Data)
{
DatabaseHeader *header = (DatabaseHeader *)pp;
rootAddress = header->RootObjectAddress;
}
Debug.Assert(rootAddress != 0);
}
}
public bool Startup(Caching.BlockCache provider, JournalRecovery recovery)
{
this.provider = provider;
this.allocator = new Allocator(provider);
this.readService = new ReadService(provider);
// We issue recovery (not written by us but still valid).
return(JournalLog.StartupRecovery(this));
}
public bool Startup(Caching.BlockCache provider, JournalRecovery recovery)
{
this.provider = provider;
this.allocator = new Allocator(provider);
this.readService = new ReadService(provider);
this.journalLog = new JournalLog(allocator);
// We issue recovery and ignore operations (certainly not written by us).
return(JournalLog.StartupRecovery(this));
}
