public void WriteBatch()
{
var writeOptions = Native.leveldb_writeoptions_create();
Native.leveldb_put(Database, writeOptions, "key1", "value1");
var writeBatch = Native.leveldb_writebatch_create();
Native.leveldb_writebatch_delete(writeBatch, "key1");
Native.leveldb_writebatch_put(writeBatch, "key2", "value2");
Native.leveldb_write(Database, writeOptions, writeBatch);
var readOptions = Native.leveldb_readoptions_create();
var value1 = Native.leveldb_get(Database, readOptions, "key1");
Assert.IsNull(value1);
var value2 = Native.leveldb_get(Database, readOptions, "key2");
Assert.AreEqual("value2", value2);
Native.leveldb_writebatch_delete(writeBatch, "key2");
Native.leveldb_writebatch_clear(writeBatch);
Native.leveldb_write(Database, writeOptions, writeBatch);
value2 = Native.leveldb_get(Database, readOptions, "key2");
Assert.AreEqual("value2", value2);
Native.leveldb_writebatch_destroy(writeBatch);
Native.leveldb_writeoptions_destroy(writeOptions);
Native.leveldb_writeoptions_destroy(readOptions);
}
public void Snapshot()
{
// modify db
var writeOptions = Native.leveldb_writeoptions_create();
Native.leveldb_put(Database, writeOptions, "key1", "value1");
Native.leveldb_writeoptions_destroy(writeOptions);
// create snapshot
var snapshot = Native.leveldb_create_snapshot(Database);
// modify db again
writeOptions = Native.leveldb_writeoptions_create();
Native.leveldb_put(Database, writeOptions, "key2", "value2");
Native.leveldb_writeoptions_destroy(writeOptions);
// read from snapshot
var readOptions = Native.leveldb_readoptions_create();
Native.leveldb_readoptions_set_snapshot(readOptions, snapshot);
var val1 = Native.leveldb_get(Database, readOptions, "key1");
Assert.AreEqual("value1", val1);
var val2 = Native.leveldb_get(Database, readOptions, "key2");
Assert.IsNull(val2);
Native.leveldb_readoptions_destroy(readOptions);
// release snapshot
Native.leveldb_release_snapshot(Database, snapshot);
snapshot = IntPtr.Zero;
}
public void Get()
{
var options = Native.leveldb_readoptions_create();
Native.leveldb_put(Database, options, "key1", "value1");
var value1 = Native.leveldb_get(Database, options, "key1");
Assert.AreEqual("value1", value1);
Native.leveldb_put(Database, options, "key2", "value2");
var value2 = Native.leveldb_get(Database, options, "key2");
Assert.AreEqual("value2", value2);
Native.leveldb_put(Database, options, "key3", "value3");
var value3 = Native.leveldb_get(Database, options, "key3");
Assert.AreEqual("value3", value3);
// verify checksums
Native.leveldb_readoptions_set_verify_checksums(options, true);
value1 = Native.leveldb_get(Database, options, "key1");
Assert.AreEqual("value1", value1);
// no fill cache
Native.leveldb_readoptions_set_fill_cache(options, false);
value2 = Native.leveldb_get(Database, options, "key2");
Assert.AreEqual("value2", value2);
Native.leveldb_readoptions_destroy(options);
}
public void Reopen()
{
Native.leveldb_close(Database);
var options = Native.leveldb_options_create();
Database = Native.leveldb_open(options, DatabasePath);
Native.leveldb_get(Database, options, "key1");
}
public string Get(ReadOptions options, string key)
{
CheckDisposed();
if (options == null)
{
options = new ReadOptions();
}
return(Native.leveldb_get(Handle, options.Handle, key, encoding));
}
public byte[] Get(ReadOptions options, byte[] key)
{
CheckDisposed();
if (options == null)
{
options = new ReadOptions();
}
return(Native.leveldb_get(Handle, options.Handle, key));
}
public void Delete()
{
var options = Native.leveldb_writeoptions_create();
Native.leveldb_put(Database, options, "key1", "value1");
var value1 = Native.leveldb_get(Database, options, "key1");
Assert.AreEqual("value1", value1);
Native.leveldb_delete(Database, options, "key1");
value1 = Native.leveldb_get(Database, options, "key1");
Assert.IsNull(value1);
}
public void Reopen()
{
Native.leveldb_close(Database);
Database = IntPtr.Zero;
var options = Native.leveldb_options_create();
Database = Native.leveldb_open(options, DatabasePath);
var readOptions = Native.leveldb_readoptions_create();
Native.leveldb_get(Database, readOptions, "key1");
Native.leveldb_readoptions_destroy(readOptions);
}
public void Delete()
{
var writeOptions = Native.leveldb_writeoptions_create();
Native.leveldb_put(Database, writeOptions, "key1", "value1");
var readOptions = Native.leveldb_readoptions_create();
var value1 = Native.leveldb_get(Database, readOptions, "key1");
Assert.AreEqual("value1", value1);
Native.leveldb_delete(Database, writeOptions, "key1");
value1 = Native.leveldb_get(Database, readOptions, "key1");
Assert.IsNull(value1);
Native.leveldb_writeoptions_destroy(writeOptions);
Native.leveldb_readoptions_destroy(readOptions);
}
public void Get()
{
var options = Native.leveldb_readoptions_create();
Native.leveldb_put(Database, options, "key1", "value1");
var value1 = Native.leveldb_get(Database, options, "key1");
Assert.AreEqual("value1", value1);
Native.leveldb_put(Database, options, "key2", "value2");
var value2 = Native.leveldb_get(Database, options, "key2");
Assert.AreEqual("value2", value2);
Native.leveldb_put(Database, options, "key3", "value3");
var value3 = Native.leveldb_get(Database, options, "key3");
Assert.AreEqual("value3", value3);
}