117 lines
3.0 KiB
Go
117 lines
3.0 KiB
Go
|
/*
|
||
|
* 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 thrift
|
||
|
|
||
|
import (
|
||
|
"compress/zlib"
|
||
|
"io"
|
||
|
"log"
|
||
|
)
|
||
|
|
||
|
// TZlibTransportFactory is a factory for TZlibTransport instances
|
||
|
type TZlibTransportFactory struct {
|
||
|
level int
|
||
|
}
|
||
|
|
||
|
// TZlibTransport is a TTransport implementation that makes use of zlib compression.
|
||
|
type TZlibTransport struct {
|
||
|
reader io.ReadCloser
|
||
|
transport TTransport
|
||
|
writer *zlib.Writer
|
||
|
}
|
||
|
|
||
|
// GetTransport constructs a new instance of NewTZlibTransport
|
||
|
func (p *TZlibTransportFactory) GetTransport(trans TTransport) (TTransport, error) {
|
||
|
return NewTZlibTransport(trans, p.level)
|
||
|
}
|
||
|
|
||
|
// NewTZlibTransportFactory constructs a new instance of NewTZlibTransportFactory
|
||
|
func NewTZlibTransportFactory(level int) *TZlibTransportFactory {
|
||
|
return &TZlibTransportFactory{level: level}
|
||
|
}
|
||
|
|
||
|
// NewTZlibTransport constructs a new instance of TZlibTransport
|
||
|
func NewTZlibTransport(trans TTransport, level int) (*TZlibTransport, error) {
|
||
|
w, err := zlib.NewWriterLevel(trans, level)
|
||
|
if err != nil {
|
||
|
log.Println(err)
|
||
|
return nil, err
|
||
|
}
|
||
|
|
||
|
return &TZlibTransport{
|
||
|
writer: w,
|
||
|
transport: trans,
|
||
|
}, nil
|
||
|
}
|
||
|
|
||
|
// Close closes the reader and writer (flushing any unwritten data) and closes
|
||
|
// the underlying transport.
|
||
|
func (z *TZlibTransport) Close() error {
|
||
|
if z.reader != nil {
|
||
|
if err := z.reader.Close(); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
}
|
||
|
if err := z.writer.Close(); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
return z.transport.Close()
|
||
|
}
|
||
|
|
||
|
// Flush flushes the writer and its underlying transport.
|
||
|
func (z *TZlibTransport) Flush() error {
|
||
|
if err := z.writer.Flush(); err != nil {
|
||
|
return err
|
||
|
}
|
||
|
return z.transport.Flush()
|
||
|
}
|
||
|
|
||
|
// IsOpen returns true if the transport is open
|
||
|
func (z *TZlibTransport) IsOpen() bool {
|
||
|
return z.transport.IsOpen()
|
||
|
}
|
||
|
|
||
|
// Open opens the transport for communication
|
||
|
func (z *TZlibTransport) Open() error {
|
||
|
return z.transport.Open()
|
||
|
}
|
||
|
|
||
|
func (z *TZlibTransport) Read(p []byte) (int, error) {
|
||
|
if z.reader == nil {
|
||
|
r, err := zlib.NewReader(z.transport)
|
||
|
if err != nil {
|
||
|
return 0, NewTTransportExceptionFromError(err)
|
||
|
}
|
||
|
z.reader = r
|
||
|
}
|
||
|
|
||
|
return z.reader.Read(p)
|
||
|
}
|
||
|
|
||
|
// RemainingBytes returns the size in bytes of the data that is still to be
|
||
|
// read.
|
||
|
func (z *TZlibTransport) RemainingBytes() uint64 {
|
||
|
return z.transport.RemainingBytes()
|
||
|
}
|
||
|
|
||
|
func (z *TZlibTransport) Write(p []byte) (int, error) {
|
||
|
return z.writer.Write(p)
|
||
|
}
|