package com.koushikdutta.async.stream;
import com.koushikdutta.async.AsyncServer;
import com.koushikdutta.async.ByteBufferList;
import com.koushikdutta.async.DataEmitter;
import com.koushikdutta.async.Util;
import com.koushikdutta.async.callback.CompletedCallback;
import com.koushikdutta.async.callback.DataCallback;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
/**
* Created by koush on 5/22/13.
*/
public class InputStreamDataEmitter implements DataEmitter {
AsyncServer server;
InputStream inputStream;
public InputStreamDataEmitter(AsyncServer server, InputStream inputStream) {
this.server = server;
this.inputStream = inputStream;
doResume();
}
DataCallback callback;
@Override
public void setDataCallback(DataCallback callback) {
this.callback = callback;
}
@Override
public DataCallback getDataCallback() {
return callback;
}
@Override
public boolean isChunked() {
return false;
}
boolean paused;
@Override
public void pause() {
paused = true;
}
@Override
public void resume() {
paused = false;
}
private void report(Exception e) {
try {
inputStream.close();
}
catch (Exception ex) {
e = ex;
}
if (endCallback != null)
endCallback.onCompleted(e);
}
ByteBufferList pending = new ByteBufferList();
Runnable pumper = new Runnable() {
@Override
public void run() {
try {
if (!pending.isEmpty()) {
Util.emitAllData(InputStreamDataEmitter.this, pending);
if (!pending.isEmpty())
return;
}
ByteBuffer b;
do {
b = ByteBufferList.obtain(8192);
int read;
if (-1 == (read = inputStream.read(b.array()))) {
report(null);
return;
}
b.limit(read);
pending.add(b);
Util.emitAllData(InputStreamDataEmitter.this, pending);
}
while (pending.remaining() == 0 && !isPaused());
}
catch (Exception e) {
report(e);
}
}
};
private void doResume() {
server.post(pumper);
}
@Override
public boolean isPaused() {
return paused;
}
CompletedCallback endCallback;
@Override
public void setEndCallback(CompletedCallback callback) {
endCallback = callback;
}
@Override
public CompletedCallback getEndCallback() {
return endCallback;
}
@Override
public AsyncServer getServer() {
return server;
}
@Override
public void close() {
report(null);
try {
inputStream.close();
}
catch (Exception e) {
}
}
}