/*
* Copyright 2014 NAVER Corp.
*
* Licensed 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 com.navercorp.pinpoint.thrift.io;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import org.apache.thrift.TBase;
import org.apache.thrift.TException;
import org.apache.thrift.protocol.TProtocol;
import org.apache.thrift.protocol.TProtocolFactory;
/**
* TBase stream(byte arrays)
*
* @author jaehong.kim
*/
public class TBaseStream {
private final TProtocolFactory protocolFactory;
private final ByteArrayOutputStreamTransport transport;
private final LinkedList<TBaseStreamNode> nodes = new LinkedList<TBaseStreamNode>();
public TBaseStream(final TProtocolFactory protocolFactory) {
this.protocolFactory = protocolFactory;
this.transport = new ByteArrayOutputStreamTransport(new UnsafeByteArrayOutputStream());
}
public void write(final List<TBase<?, ?>> list) throws TException {
for (TBase<?, ?> base : list) {
write(base);
}
}
public void write(final TBase<?, ?> base) throws TException {
final TBaseStreamNode node = new TBaseStreamNode(transport);
node.setClassName(base.getClass().getName());
node.setBeginPosition(transport.getBufferPosition());
final TProtocol protocol = protocolFactory.getProtocol(transport);
base.write(protocol);
node.setEndPosition(transport.getBufferPosition());
nodes.add(node);
}
public boolean isEmpty() {
return nodes.isEmpty();
}
public int size() {
int size = 0;
for (TBaseStreamNode node : nodes) {
size += node.size();
}
return size;
}
public List<ByteArrayOutput> splitAll() {
final List<ByteArrayOutput> list = new ArrayList<ByteArrayOutput>();
TBaseStreamNode node = null;
while ((node = nodes.peek()) != null) {
list.add(node);
nodes.poll();
}
return list;
}
public List<ByteArrayOutput> split(final int maxSize) {
final List<ByteArrayOutput> list = new ArrayList<ByteArrayOutput>();
int currentSize = 0;
TBaseStreamNode node = null;
while ((node = nodes.peek()) != null) {
if (node.size() > maxSize) {
if (list.isEmpty()) {
// first node
list.add(node);
nodes.poll();
}
break;
}
if (currentSize + node.size() > maxSize) {
break;
}
currentSize += node.size();
list.add(node);
nodes.poll();
}
return list;
}
public void clear() throws TException {
nodes.clear();
transport.flush();
}
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("{");
sb.append("nodes=").append(nodes).append(", ");
sb.append("transport=").append(transport);
sb.append("}");
return sb.toString();
}
}