| /* |
| * 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.TFramedTransport; |
| import org.apache.thrift.transport.TTransport; |
| import org.apache.thrift.transport.TTransportException; |
| import org.apache.thrift.transport.TTransportFactory; |
| |
| public class TElasticFramedTransport extends TTransport { |
| |
| public static class Factory extends TTransportFactory { |
| |
| /** |
| * It is used to prevent the size of the parsing package from being too large and allocating the |
| * buffer will cause oom. Therefore, the maximum length of the requested memory is limited when |
| * reading. |
| */ |
| protected final int thriftMaxFrameSize; |
| |
| /** |
| * The capacity of the underlying buffer is allowed to exceed thriftDefaultBufferSize, but if |
| * adjacent requests all have sizes smaller than thriftDefaultBufferSize, the underlying buffer |
| * will be shrunk beneath thriftDefaultBufferSize. The shrinking is limited at most once per |
| * minute to reduce overhead when thriftDefaultBufferSize is set unreasonably or the workload |
| * naturally contains both ver large and very small requests. |
| */ |
| protected final int thriftDefaultBufferSize; |
| |
| public Factory() { |
| this(RpcUtils.THRIFT_DEFAULT_BUF_CAPACITY, RpcUtils.THRIFT_FRAME_MAX_SIZE); |
| } |
| |
| public Factory(int thriftDefaultBufferSize, int thriftMaxFrameSize) { |
| this.thriftDefaultBufferSize = thriftDefaultBufferSize; |
| this.thriftMaxFrameSize = thriftMaxFrameSize; |
| } |
| |
| @Override |
| public TTransport getTransport(TTransport trans) { |
| return new TElasticFramedTransport(trans, thriftDefaultBufferSize, thriftMaxFrameSize); |
| } |
| } |
| |
| public TElasticFramedTransport(TTransport underlying) { |
| this(underlying, RpcUtils.THRIFT_DEFAULT_BUF_CAPACITY, RpcUtils.THRIFT_FRAME_MAX_SIZE); |
| } |
| |
| public TElasticFramedTransport( |
| TTransport underlying, int thriftDefaultBufferSize, int thriftMaxFrameSize) { |
| this.underlying = underlying; |
| this.thriftDefaultBufferSize = thriftDefaultBufferSize; |
| this.thriftMaxFrameSize = thriftMaxFrameSize; |
| readBuffer = new AutoScalingBufferReadTransport(thriftDefaultBufferSize); |
| writeBuffer = new AutoScalingBufferWriteTransport(thriftDefaultBufferSize); |
| } |
| |
| protected final int thriftDefaultBufferSize; |
| protected final int thriftMaxFrameSize; |
| |
| protected final TTransport underlying; |
| protected AutoScalingBufferReadTransport readBuffer; |
| protected AutoScalingBufferWriteTransport writeBuffer; |
| protected final byte[] i32buf = new byte[4]; |
| |
| @Override |
| public boolean isOpen() { |
| return underlying.isOpen(); |
| } |
| |
| @Override |
| public void open() throws TTransportException { |
| underlying.open(); |
| } |
| |
| @Override |
| public void close() { |
| underlying.close(); |
| } |
| |
| @Override |
| public int read(byte[] buf, int off, int len) throws TTransportException { |
| int got = readBuffer.read(buf, off, len); |
| if (got > 0) { |
| return got; |
| } |
| |
| // Read another frame of data |
| readFrame(); |
| return readBuffer.read(buf, off, len); |
| } |
| |
| 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 + ")!"); |
| } |
| |
| if (size > thriftMaxFrameSize) { |
| close(); |
| throw new TTransportException( |
| TTransportException.CORRUPTED_DATA, |
| "Frame size (" + size + ") larger than protect max size (" + thriftMaxFrameSize + ")!"); |
| } |
| readBuffer.fill(underlying, size); |
| } |
| |
| @Override |
| public void flush() throws TTransportException { |
| int length = writeBuffer.getPos(); |
| TFramedTransport.encodeFrameSize(length, i32buf); |
| underlying.write(i32buf, 0, 4); |
| underlying.write(writeBuffer.getBuffer(), 0, length); |
| writeBuffer.reset(); |
| if (length > thriftDefaultBufferSize) { |
| writeBuffer.resizeIfNecessary(thriftDefaultBufferSize); |
| } |
| underlying.flush(); |
| } |
| |
| @Override |
| public void write(byte[] buf, int off, int len) { |
| writeBuffer.write(buf, off, len); |
| } |
| } |