| // Copyright 2015 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package io.v.v23.syncbase.nosql; |
| |
| import com.google.common.util.concurrent.AsyncFunction; |
| import com.google.common.util.concurrent.Futures; |
| import com.google.common.util.concurrent.ListenableFuture; |
| |
| import java.lang.reflect.Type; |
| |
| import io.v.impl.google.naming.NamingUtil; |
| import io.v.v23.VFutures; |
| import io.v.v23.context.VContext; |
| import io.v.v23.services.syncbase.nosql.RowClient; |
| import io.v.v23.services.syncbase.nosql.RowClientFactory; |
| import io.v.v23.syncbase.util.Util; |
| import io.v.v23.verror.VException; |
| import io.v.v23.vom.VomUtil; |
| |
| class RowImpl implements Row { |
| private final String fullName; |
| private final String key; |
| private final int schemaVersion; |
| private final RowClient client; |
| |
| RowImpl(String parentFullName, String key, int schemaVersion) { |
| // Note, we immediately unescape row keys on the server side. See |
| // comment in server/nosql/dispatcher.go for explanation. |
| this.fullName = NamingUtil.join(parentFullName, Util.escape(key)); |
| this.key = key; |
| this.schemaVersion = schemaVersion; |
| this.client = RowClientFactory.getRowClient(this.fullName); |
| } |
| @Override |
| public String key() { |
| return key; |
| } |
| @Override |
| public String fullName() { |
| return fullName; |
| } |
| @Override |
| public ListenableFuture<Boolean> exists(VContext ctx) { |
| return client.exists(ctx, schemaVersion); |
| } |
| @Override |
| public ListenableFuture<Void> delete(VContext ctx) { |
| return client.delete(ctx, schemaVersion); |
| } |
| @Override |
| public ListenableFuture<Object> get(VContext ctx, final Type type) { |
| return VFutures.withUserLandChecks(ctx, Futures.transform(client.get(ctx, schemaVersion), |
| new AsyncFunction<byte[], Object>() { |
| @Override |
| public ListenableFuture<Object> apply(byte[] data) throws Exception { |
| return Futures.immediateFuture(VomUtil.decode(data, type)); |
| } |
| })); |
| } |
| @Override |
| public ListenableFuture<Void> put(VContext ctx, Object value, Type type) { |
| try { |
| byte[] data = VomUtil.encode(value, type); |
| return client.put(ctx, schemaVersion, data); |
| } catch (VException e) { |
| return VFutures.withUserLandChecks(ctx, Futures.<Void>immediateFailedFuture(e)); |
| } |
| } |
| } |