THRIFT-923. cpp: Implement a fully nonblocking server and client
There are three major parts of this:
1/ New callback-style interfaces for for a few key Thrift components:
TAsyncProcessor for servers and TAsyncChannel for clients.
2/ Concrete implementations of TAsyncChannel and a server for
TAsyncProcessor based on evhttp.
3/ Async-style code generation for C++
git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@1005127 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/async/TAsyncChannel.h b/lib/cpp/src/async/TAsyncChannel.h
new file mode 100644
index 0000000..d5cd419
--- /dev/null
+++ b/lib/cpp/src/async/TAsyncChannel.h
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#ifndef _THRIFT_ASYNC_TASYNCCHANNEL_H_
+#define _THRIFT_ASYNC_TASYNCCHANNEL_H_ 1
+
+#include <tr1/functional>
+#include <Thrift.h>
+#include <transport/TTransportUtils.h>
+
+namespace apache { namespace thrift { namespace transport {
+class TMemoryBuffer;
+}}}
+
+namespace apache { namespace thrift { namespace async {
+using apache::thrift::transport::TMemoryBuffer;
+
+class TAsyncTransport;
+
+class TAsyncChannel {
+ public:
+ typedef std::tr1::function<void()> VoidCallback;
+
+ virtual ~TAsyncChannel() {}
+
+ // is the channel in a good state?
+ virtual bool good() const = 0;
+ virtual bool error() const = 0;
+ virtual bool timedOut() const = 0;
+
+ /**
+ * Send a message over the channel.
+ *
+ * @return true iff the cob has been or will be called, else false
+ */
+ virtual bool sendMessage(const VoidCallback& cob, apache::thrift::transport::TMemoryBuffer* message) = 0;
+
+ /**
+ * Receive a message from the channel.
+ *
+ * @return true iff the cob has been or will be called, else false
+ */
+ virtual bool recvMessage(const VoidCallback& cob, apache::thrift::transport::TMemoryBuffer* message) = 0;
+
+ /**
+ * Send a message over the channel and receive a response.
+ *
+ * @return true iff the cob has been or will be called, else false
+ */
+ virtual bool sendAndRecvMessage(const VoidCallback& cob,
+ apache::thrift::transport::TMemoryBuffer* sendBuf,
+ apache::thrift::transport::TMemoryBuffer* recvBuf);
+};
+
+}}} // apache::thrift::async
+
+#endif // #ifndef _THRIFT_ASYNC_TASYNCCHANNEL_H_