public void TestCreateAndUpdatePage()
{
ulong newPage;
using (var pageStore = CreateEmptyPageStore("TestCreateAndUpdatePage.dat"))
{
newPage = pageStore.Create();
pageStore.Write(1, newPage, _testBuffer1);
pageStore.Commit(1, null);
}
Assert.AreEqual(1ul, newPage);
using (var fs = new FileStream("TestCreateAndUpdatePage.dat", FileMode.Open, FileAccess.Read))
{
Assert.AreEqual(8192L, fs.Length);
}
using (var pageStore = new BinaryFilePageStore(_pm, "TestCreateAndUpdatePage.dat", 4096, true, 1))
{
var pageData = pageStore.Retrieve(newPage, null);
Assert.AreEqual(0, _testBuffer1.Compare(pageData));
pageStore.Write(2, newPage, _testBuffer2);
pageStore.Commit(2, null);
}
using (var pageStore = new BinaryFilePageStore(_pm, "TestCreateAndUpdatePage.dat", 4096, true, 2))
{
var pageData = pageStore.Retrieve(newPage, null);
Assert.AreEqual(0, _testBuffer2.Compare(pageData));
}
}
public void TestStoreModifiedExceptionThrown()
{
ulong pageId;
byte[] buffer1 = new byte[] {1, 1, 1, 1};
byte[] buffer2 = new byte[] {2, 2, 2, 2};
using (
var pageStore = TestUtils.CreateEmptyPageStore("TestStoreModifiedExceptionThrown.data",
PersistenceType.Rewrite))
{
pageId = pageStore.Create();
pageStore.Write(1, pageId, buffer1, 0, 0, 4);
pageStore.Commit(1, null);
}
using (
var readStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 1))
{
var page = readStore.Retrieve(1, null);
Assert.AreEqual(1, page[0]);
using (
var writeStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 1))
{
writeStore.Write(2, pageId, buffer2, 0, 0, 4);
writeStore.Commit(2, null);
}
page = readStore.Retrieve(1, null);
Assert.AreEqual(1, page[0]);
using (
var writeStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 2))
{
writeStore.Write(3, pageId, buffer2, 0, 0, 4);
writeStore.Commit(3, null);
}
page = readStore.Retrieve(1, null);
Assert.AreEqual(1, page[0]);
// We should not reach this assert because the ReadWriteStoreModifiedException should get thrown
}
}
public void TestReopenAfterReadWriteStoreModifiedException()
{
ulong pageId;
var buffer1 = new byte[] {1, 1, 1, 1};
var buffer2 = new byte[] {2, 2, 2, 2};
var buffer3 = new byte[] {3, 3, 3, 3};
using (
var pageStore = TestUtils.CreateEmptyPageStore("TestStoreModifiedExceptionThrown.data",
PersistenceType.Rewrite))
{
pageId = pageStore.Create();
pageStore.Write(1, pageId, buffer1, 0, 0, 4);
pageStore.Commit(1, null);
}
var readStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 1);
try
{
var page = readStore.Retrieve(1, null);
Assert.AreEqual(1, page[0]);
using (
var writeStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 1))
{
writeStore.Write(2, pageId, buffer2, 0, 0, 4);
writeStore.Commit(2, null);
}
page = readStore.Retrieve(1, null);
Assert.AreEqual(1, page[0]);
using (
var writeStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 2))
{
writeStore.Write(3, pageId, buffer3, 0, 0, 4);
writeStore.Commit(3, null);
}
try
{
readStore.Retrieve(1, null);
Assert.Fail("Expected ReadWriteStoreModifiedException to be thrown");
}
catch (ReadWriteStoreModifiedException)
{
readStore.Close();
readStore.Dispose();
readStore = null;
readStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 3);
page = readStore.Retrieve(1, null);
Assert.AreEqual(3, page[0]);
}
}
finally
{
if (readStore != null)
{
readStore.Dispose();
}
}
}
