| /* |
| * 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. |
| */ |
| package org.apache.iotdb.rpc; |
| |
| import org.apache.thrift.transport.TTransport; |
| import org.apache.thrift.transport.TTransportException; |
| import org.apache.thrift.transport.layered.TFramedTransport; |
| |
| import java.io.IOException; |
| |
| public abstract class TCompressedElasticFramedTransport extends TElasticFramedTransport { |
| |
| private AutoScalingBufferWriteTransport writeCompressBuffer; |
| private AutoScalingBufferReadTransport readCompressBuffer; |
| |
| protected TCompressedElasticFramedTransport( |
| TTransport underlying, int thriftDefaultBufferSize, int thriftMaxFrameSize) { |
| super(underlying, thriftDefaultBufferSize, thriftMaxFrameSize); |
| writeCompressBuffer = new AutoScalingBufferWriteTransport(thriftDefaultBufferSize); |
| readCompressBuffer = new AutoScalingBufferReadTransport(thriftDefaultBufferSize); |
| } |
| |
| @Override |
| protected void readFrame() throws TTransportException { |
| underlying.readAll(i32buf, 0, 4); |
| int size = TFramedTransport.decodeFrameSize(i32buf); |
| |
| if (size < 0) { |
| close(); |
| throw new TTransportException( |
| TTransportException.CORRUPTED_DATA, "Read a negative frame size (" + size + ")!"); |
| } |
| |
| readBuffer.fill(underlying, size); |
| RpcStat.readCompressedBytes.addAndGet(size); |
| try { |
| int uncompressedLength = uncompressedLength(readBuffer.getBuffer(), 0, size); |
| RpcStat.readBytes.addAndGet(uncompressedLength); |
| readCompressBuffer.resizeIfNecessary(uncompressedLength); |
| uncompress(readBuffer.getBuffer(), 0, size, readCompressBuffer.getBuffer(), 0); |
| readCompressBuffer.limit(uncompressedLength); |
| readCompressBuffer.position(0); |
| readBuffer.fill(readCompressBuffer, uncompressedLength); |
| } catch (IOException e) { |
| throw new TTransportException(e); |
| } |
| } |
| |
| @Override |
| public void flush() throws TTransportException { |
| int length = writeBuffer.getPos(); |
| RpcStat.writeBytes.addAndGet(length); |
| try { |
| int maxCompressedLength = maxCompressedLength(length); |
| writeCompressBuffer.resizeIfNecessary(maxCompressedLength); |
| int compressedLength = |
| compress(writeBuffer.getBuffer(), 0, length, writeCompressBuffer.getBuffer(), 0); |
| RpcStat.writeCompressedBytes.addAndGet(compressedLength); |
| TFramedTransport.encodeFrameSize(compressedLength, i32buf); |
| underlying.write(i32buf, 0, 4); |
| underlying.write(writeCompressBuffer.getBuffer(), 0, compressedLength); |
| } catch (IOException e) { |
| throw new TTransportException(e); |
| } |
| |
| writeBuffer.reset(); |
| if (thriftDefaultBufferSize < length) { |
| writeBuffer.resizeIfNecessary(thriftDefaultBufferSize); |
| } |
| underlying.flush(); |
| } |
| |
| protected abstract int uncompressedLength(byte[] but, int off, int len) throws IOException; |
| |
| protected abstract int maxCompressedLength(int len); |
| |
| protected abstract int compress(byte[] input, int inOff, int len, byte[] output, int outOff) |
| throws IOException; |
| |
| protected abstract void uncompress(byte[] input, int inOff, int size, byte[] output, int outOff) |
| throws IOException; |
| } |