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// 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.thrift.transport;
import haxe.Int64;
import org.apache.thrift.TConfiguration;
class TEndpointTransport extends TTransport
{
private var MaxMessageSize(get, never) : Int64;
private var KnownMessageSize(default, null) : Int64 ;
private var RemainingMessageSize(default, null) : Int64 ;
private var _configuration(default,null) : TConfiguration;
public override function get_Configuration() : TConfiguration {
return _configuration;
}
private function get_MaxMessageSize() : Int64 {
return Configuration.MaxMessageSize;
}
// private CTOR to prevent direct instantiation
// in other words, this class MUST be extended
private function new( config : TConfiguration)
{
_configuration = (config != null) ? config : new TConfiguration();
ResetConsumedMessageSize();
}
// Resets RemainingMessageSize to the configured maximum
private function ResetConsumedMessageSize(?newSize : Int64) : Void
{
// full reset
if (newSize == null)
{
KnownMessageSize = MaxMessageSize;
RemainingMessageSize = MaxMessageSize;
return;
}
// update only: message size can shrink, but not grow
if (newSize > KnownMessageSize)
throw new TTransportException(TTransportException.END_OF_FILE, "ResetConsumedMessageSize: MaxMessageSize reached");
KnownMessageSize = newSize;
RemainingMessageSize = newSize;
}
// Updates RemainingMessageSize to reflect then known real message size (e.g. framed transport).
// Will throw if we already consumed too many bytes or if the new size is larger than allowed.
public override function UpdateKnownMessageSize(size : Int64) : Void
{
var consumed = KnownMessageSize - RemainingMessageSize;
ResetConsumedMessageSize(size);
CountConsumedMessageBytes(consumed);
}
// Throws if there are not enough bytes in the input stream to satisfy a read of numBytes bytes of data
public override function CheckReadBytesAvailable(numBytes : Int64) : Void
{
if (RemainingMessageSize < numBytes)
throw new TTransportException(TTransportException.END_OF_FILE, 'CheckReadBytesAvailable(${numBytes}): MaxMessageSize reached, only ${RemainingMessageSize} bytes available');
}
// Consumes numBytes from the RemainingMessageSize.
private function CountConsumedMessageBytes(numBytes : Int64) : Void
{
if (RemainingMessageSize >= numBytes)
{
RemainingMessageSize -= numBytes;
}
else
{
RemainingMessageSize = 0;
throw new TTransportException(TTransportException.END_OF_FILE, 'CountConsumedMessageBytes(${numBytes}): MaxMessageSize reached');
}
}
}
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