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io.airlift.drift.protocol.TBinaryProtocol Maven / Gradle / Ivy
/*
* 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
* limitations under the License.
*/
package io.airlift.drift.protocol;
import io.airlift.drift.TException;
import java.nio.ByteBuffer;
import static java.lang.Double.doubleToLongBits;
import static java.lang.Double.longBitsToDouble;
import static java.nio.charset.StandardCharsets.UTF_8;
import static java.util.Objects.requireNonNull;
/**
* Binary protocol implementation for thrift.
*/
public class TBinaryProtocol
implements TProtocol
{
private static final TStruct ANONYMOUS_STRUCT = new TStruct("");
protected static final int VERSION_MASK = 0xffff0000;
protected static final int VERSION_1 = 0x80010000;
private final TTransport transport;
/**
* Constructor
*/
public TBinaryProtocol(TTransport transport)
{
this.transport = requireNonNull(transport, "transport is null");
}
@Override
public void writeMessageBegin(TMessage message)
throws TException
{
writeI32(VERSION_1 | (message.getType() & 0xFF));
writeString(message.getName());
writeI32(message.getSequenceId());
}
@Override
public void writeMessageEnd() {}
@Override
public void writeStructBegin(TStruct struct) {}
@Override
public void writeStructEnd() {}
@Override
public void writeFieldBegin(TField field)
throws TException
{
writeByte(field.getType());
writeI16(field.getId());
}
@Override
public void writeFieldEnd() {}
@Override
public void writeFieldStop()
throws TException
{
writeByte(TType.STOP);
}
@Override
public void writeMapBegin(TMap map)
throws TException
{
writeByte(map.getKeyType());
writeByte(map.getValueType());
writeI32(map.getSize());
}
@Override
public void writeMapEnd() {}
@Override
public void writeListBegin(TList list)
throws TException
{
writeByte(list.getType());
writeI32(list.getSize());
}
@Override
public void writeListEnd() {}
@Override
public void writeSetBegin(TSet set)
throws TException
{
writeByte(set.getType());
writeI32(set.getSize());
}
@Override
public void writeSetEnd() {}
@Override
public void writeBool(boolean value)
throws TException
{
writeByte((byte) (value ? 1 : 0));
}
private final byte[] bout = new byte[1];
@Override
public void writeByte(byte value)
throws TException
{
bout[0] = value;
transport.write(bout, 0, 1);
}
private final byte[] i16out = new byte[2];
@Override
public void writeI16(short value)
throws TException
{
i16out[0] = (byte) (0xff & (value >> 8));
i16out[1] = (byte) (0xff & (value));
transport.write(i16out, 0, 2);
}
private final byte[] i32out = new byte[4];
@Override
public void writeI32(int value)
throws TException
{
i32out[0] = (byte) (0xff & (value >> 24));
i32out[1] = (byte) (0xff & (value >> 16));
i32out[2] = (byte) (0xff & (value >> 8));
i32out[3] = (byte) (0xff & (value));
transport.write(i32out, 0, 4);
}
private final byte[] i64out = new byte[8];
@Override
public void writeI64(long value)
throws TException
{
i64out[0] = (byte) (0xff & (value >> 56));
i64out[1] = (byte) (0xff & (value >> 48));
i64out[2] = (byte) (0xff & (value >> 40));
i64out[3] = (byte) (0xff & (value >> 32));
i64out[4] = (byte) (0xff & (value >> 24));
i64out[5] = (byte) (0xff & (value >> 16));
i64out[6] = (byte) (0xff & (value >> 8));
i64out[7] = (byte) (0xff & (value));
transport.write(i64out, 0, 8);
}
@Override
public void writeDouble(double value)
throws TException
{
writeI64(doubleToLongBits(value));
}
@Override
public void writeString(String value)
throws TException
{
byte[] dat = value.getBytes(UTF_8);
writeI32(dat.length);
transport.write(dat);
}
@Override
public void writeBinary(ByteBuffer value)
throws TException
{
int length = value.limit() - value.position();
writeI32(length);
transport.write(value.array(), value.position() + value.arrayOffset(), length);
}
/**
* Reading methods.
*/
@Override
public TMessage readMessageBegin()
throws TException
{
int size = readI32();
if (size < 0) {
int version = size & VERSION_MASK;
if (version != VERSION_1) {
throw new TProtocolException("Bad version in readMessageBegin: " + version);
}
return new TMessage(readString(), (byte) (size & 0x000000ff), readI32());
}
// throw new TProtocolException("Missing version in readMessageBegin (old client?)");
return new TMessage(readStringBody(size), readByte(), readI32());
}
@Override
public void readMessageEnd() {}
@Override
public TStruct readStructBegin()
{
return ANONYMOUS_STRUCT;
}
@Override
public void readStructEnd() {}
@Override
public TField readFieldBegin()
throws TException
{
byte type = readByte();
short id = type == TType.STOP ? 0 : readI16();
return new TField("", type, id);
}
@Override
public void readFieldEnd() {}
@Override
public TMap readMapBegin()
throws TException
{
TMap map = new TMap(readByte(), readByte(), readI32());
checkSize(map.getSize());
return map;
}
@Override
public void readMapEnd() {}
@Override
public TList readListBegin()
throws TException
{
TList list = new TList(readByte(), readI32());
checkSize(list.getSize());
return list;
}
@Override
public void readListEnd() {}
@Override
public TSet readSetBegin()
throws TException
{
TSet set = new TSet(readByte(), readI32());
checkSize(set.getSize());
return set;
}
@Override
public void readSetEnd() {}
@Override
public boolean readBool()
throws TException
{
return (readByte() == 1);
}
private final byte[] bin = new byte[1];
@Override
public byte readByte()
throws TException
{
readAll(bin, 1);
return bin[0];
}
private final byte[] i16rd = new byte[2];
@Override
public short readI16()
throws TException
{
byte[] buf = i16rd;
int off = 0;
readAll(i16rd, 2);
return (short) (((buf[off] & 0xff) << 8) | ((buf[off + 1] & 0xff)));
}
private final byte[] i32rd = new byte[4];
@Override
public int readI32()
throws TException
{
byte[] buf = i32rd;
int off = 0;
readAll(i32rd, 4);
return ((buf[off] & 0xff) << 24) |
((buf[off + 1] & 0xff) << 16) |
((buf[off + 2] & 0xff) << 8) |
((buf[off + 3] & 0xff));
}
private final byte[] i64rd = new byte[8];
@Override
public long readI64()
throws TException
{
byte[] buf = i64rd;
int off = 0;
readAll(i64rd, 8);
return ((long) (buf[off] & 0xff) << 56) |
((long) (buf[off + 1] & 0xff) << 48) |
((long) (buf[off + 2] & 0xff) << 40) |
((long) (buf[off + 3] & 0xff) << 32) |
((long) (buf[off + 4] & 0xff) << 24) |
((long) (buf[off + 5] & 0xff) << 16) |
((long) (buf[off + 6] & 0xff) << 8) |
((long) (buf[off + 7] & 0xff));
}
@Override
public double readDouble()
throws TException
{
return longBitsToDouble(readI64());
}
@Override
public String readString()
throws TException
{
int size = checkSize(readI32());
return readStringBody(size);
}
public String readStringBody(int size)
throws TException
{
byte[] buf = new byte[size];
transport.read(buf, 0, size);
return new String(buf, UTF_8);
}
@Override
public ByteBuffer readBinary()
throws TException
{
int size = checkSize(readI32());
byte[] buf = new byte[size];
transport.read(buf, 0, size);
return ByteBuffer.wrap(buf);
}
private static int checkSize(int length)
throws TProtocolException
{
if (length < 0) {
throw new TProtocolException("Negative length: " + length);
}
return length;
}
private void readAll(byte[] buf, int len)
throws TException
{
transport.read(buf, 0, len);
}
}
