Created
April 2, 2014 19:04
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Receive delimited protobuf message in Java
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| private byte readByte() { | |
| ByteBuffer byteBuffer = ByteBuffer.allocate(1); | |
| timeout.start("Timed out during protocol buffers message parsing"); | |
| try { | |
| int bytesRead = 0; | |
| while(bytesRead==0) | |
| bytesRead+=client.read(byteBuffer); | |
| } catch (IOException e) { | |
| //if (running) testMenu.createErrorDialog("Error", "Error parsing protobuf message", null); | |
| return 0; | |
| } | |
| if(timeout != null) | |
| timeout.stop(); | |
| return byteBuffer.get(0); | |
| } | |
| public int readRawVarint32() { | |
| byte bite = readByte(); | |
| int result = bite & 0x7f; | |
| int recv_bytes = 1; | |
| while ((bite & 0x80)!=0){ | |
| bite = readByte(); | |
| if(bite<0){ | |
| return 0; | |
| } | |
| recv_bytes++; | |
| result |= (bite & 0x7f) << 7*(recv_bytes-1); | |
| if ((bite & 0x80) == 0) { | |
| return result; | |
| } | |
| } | |
| return result; | |
| } | |
| protected ByteBuffer readProtobufMessage(){ | |
| ByteBuffer byteBuffer = ByteBuffer.allocate(BUFFER_SIZE); | |
| try { | |
| //read varint32 delimiter | |
| int delim = readRawVarint32(); | |
| //use delimiter to read the rest of the message (handle partial recvs) | |
| int bytesRead = 0; | |
| timeout.start("Timed out during protocol buffers message parsing"); | |
| while (bytesRead < delim && running) { | |
| bytesRead += client.read(byteBuffer); | |
| } | |
| } catch (IOException e) { | |
| //if (running) testMenu.createErrorDialog("Error", "Error parsing protobuf message", null); | |
| return null; | |
| } | |
| if (timeout != null && timeout.stop()) return null; | |
| return running ? byteBuffer : null; | |
| } |
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