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/*
* 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.
*/
#pragma once
namespace Apache {
namespace Qpid {
namespace Interop {
using namespace System;
using namespace System::Runtime::InteropServices;
using namespace qpid::client;
using namespace qpid::framing;
using namespace std;
// This class provides memory streaming of the message body contents
// between native and managed space. To avoid additional memory copies
// in native space, it reads and writes directly to the low level Qpid
// frames.
public ref class MessageBodyStream : System::IO::Stream
{
private:
bool isInputStream;
long long length;
long long position;
// the boost smart pointer that keeps the message body frames in memory
FrameSet::shared_ptr *frameSetpp;
int fragmentCount;
int fragmentIndex;
const char* currentFragment;
int fragmentPosition;
int fragmentLength;
array<IntPtr>^ fragments;
int maxFrameContentSize;
AMQFrame* currentFramep;
void* headerBodyp;
bool disposed;
bool finalizing;
void Cleanup();
internal:
// incoming message
MessageBodyStream(FrameSet::shared_ptr *fspp);
// outgoing message
MessageBodyStream(int maxFrameSize);
void pushCurrentFrame(bool last);
public:
~MessageBodyStream();
!MessageBodyStream();
virtual void Close() override;
virtual int Read(
[InAttribute] [OutAttribute] array<unsigned char>^ buffer,
int offset,
int count) override;
virtual void Write(
array<unsigned char>^ buffer,
int offset,
int count) override;
IntPtr GetFrameSet();
IntPtr GetHeader();
virtual void Flush() override {} // noop
// TODO: see CanSeek below.
virtual long long Seek(
long long offset,
System::IO::SeekOrigin origin) override {throw gcnew System::NotSupportedException(); }
// TODO: see CanSeek below.
virtual void SetLength(
long long value) override {throw gcnew System::NotSupportedException(); }
virtual property long long Length {
long long get() override { return length; }
};
virtual property long long Position {
long long get() override { return position; }
void set(long long p) override { throw gcnew System::NotSupportedException(); }
};
virtual property bool CanRead {
bool get () override { return isInputStream; }
}
virtual property bool CanWrite {
bool get () override { return !isInputStream; }
}
// Note: this class must return true to signal that the Length property works.
// Required by the raw message encoder.
// "If a class derived from Stream does not support seeking, calls to Length,
// SetLength, Position, and Seek throw a NotSupportedException".
virtual property bool CanSeek {
bool get () override { return true; }
}
virtual property bool CanTimeout {
bool get () override { return isInputStream; }
}
};
}}} // namespace Apache::Qpid::Interop
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