/*
* 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.blur.thirdparty.thrift_0_9_0.transport;
import org.apache.blur.thirdparty.thrift_0_9_0.TException;
import org.apache.blur.thirdparty.thrift_0_9_0.TProcessor;
import org.apache.blur.thirdparty.thrift_0_9_0.protocol.TProtocol;
import org.apache.blur.thirdparty.thrift_0_9_0.protocol.TProtocolFactory;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.RandomAccessFile;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
/**
* FileProcessor: helps in processing files generated by TFileTransport.
* Port of original cpp implementation
*
* @author Joydeep Sen Sarma <jssarma@facebook.com>
*/
public class TFileProcessor {
private TProcessor processor_;
private TProtocolFactory inputProtocolFactory_;
private TProtocolFactory outputProtocolFactory_;
private TFileTransport inputTransport_;
private TTransport outputTransport_;
public TFileProcessor(TProcessor processor, TProtocolFactory protocolFactory,
TFileTransport inputTransport,
TTransport outputTransport) {
processor_ = processor;
inputProtocolFactory_ = outputProtocolFactory_ = protocolFactory;
inputTransport_ = inputTransport;
outputTransport_ = outputTransport;
}
public TFileProcessor(TProcessor processor,
TProtocolFactory inputProtocolFactory,
TProtocolFactory outputProtocolFactory,
TFileTransport inputTransport,
TTransport outputTransport) {
processor_ = processor;
inputProtocolFactory_ = inputProtocolFactory;
outputProtocolFactory_ = outputProtocolFactory;
inputTransport_ = inputTransport;
outputTransport_ = outputTransport;
}
private void processUntil(int lastChunk) throws TException {
TProtocol ip = inputProtocolFactory_.getProtocol(inputTransport_);
TProtocol op = outputProtocolFactory_.getProtocol(outputTransport_);
int curChunk = inputTransport_.getCurChunk();
try {
while (lastChunk >= curChunk) {
processor_.process(ip, op);
int newChunk = inputTransport_.getCurChunk();
curChunk = newChunk;
}
} catch (TTransportException e) {
// if we are processing the last chunk - we could have just hit EOF
// on EOF - trap the error and stop processing.
if(e.getType() != TTransportException.END_OF_FILE)
throw e;
else {
return;
}
}
}
/**
* Process from start to last chunk both inclusive where chunks begin from 0
* @param startChunkNum first chunk to be processed
* @param endChunkNum last chunk to be processed
*/
public void processChunk(int startChunkNum, int endChunkNum) throws TException {
int numChunks = inputTransport_.getNumChunks();
if(endChunkNum < 0)
endChunkNum += numChunks;
if(startChunkNum < 0)
startChunkNum += numChunks;
if(endChunkNum < startChunkNum)
throw new TException("endChunkNum " + endChunkNum + " is less than " + startChunkNum);
inputTransport_.seekToChunk(startChunkNum);
processUntil(endChunkNum);
}
/**
* Process a single chunk
*
* @param chunkNum chunk to be processed
*/
public void processChunk(int chunkNum) throws TException {
processChunk(chunkNum, chunkNum);
}
/**
* Process a current chunk
*/
public void processChunk() throws TException {
processChunk(inputTransport_.getCurChunk());
}
}