protected Commutable receiveData(Connection conn, Connection nextConn) throws Exception {
InputStream in = conn.getInputDtream();
OutputStream outNextWorker = null;
if (nextConn != null) {
outNextWorker = nextConn.getOutputStream();
}
// Receive data
ByteArray byteArray = receiveByteArray(in, outNextWorker);
// Close connection
conn.close();
if (nextConn != null) {
nextConn.close();
}
// Process byte array
Commutable data = null;
try {
data = processByteArray(byteArray);
} catch (Exception e) {
releaseBytes(byteArray.getArray());
releaseInts(byteArray.getMetaArray());
throw e;
}
return data;
}
/**
* Receive 1. command 2. byte array size 3. meta data size 4. meta data content
*
* @param in
* @param outNextWorker
* @return
* @throws Exception
*/
private ByteArray receiveByteArray(InputStream in, OutputStream outNextWorker) throws Exception {
// int size = din.readInt();
// int metaDataSize = din.readInt();
// Read byte array size and meta array size
byte[] sizeBytes = this.getResourcePool().getByteArrayPool().getArray(8);
in.read(sizeBytes);
// Forward
if (outNextWorker != null) {
outNextWorker.write(this.getCommand());
outNextWorker.write(sizeBytes);
}
DataDeserializer deserializer = new DataDeserializer(sizeBytes);
int size = deserializer.readInt();
int metaArraySize = deserializer.readInt();
this.getResourcePool().getByteArrayPool().releaseArrayInUse(sizeBytes);
// Read meta array
int[] metaArray = null;
if (metaArraySize > 0) {
metaArray = this.getResourcePool().getIntArrayPool().getArray(metaArraySize);
byte[] metaArrayBytes = this.getResourcePool().getByteArrayPool().getArray(4 * metaArraySize);
in.read(metaArrayBytes);
// Forward
if (outNextWorker != null) {
outNextWorker.write(metaArrayBytes);
}
deserializer.setData(metaArrayBytes);
for (int i = 0; i < metaArraySize; i++) {
metaArray[i] = deserializer.readInt();
}
this.getResourcePool().getByteArrayPool().releaseArrayInUse(metaArrayBytes);
}
if (outNextWorker != null) {
outNextWorker.flush();
}
// Prepare internal bytes structure
byte[] bytes =
this.getResourcePool().getByteArrayPool().getArray(size + Constants.SENDRECV_BYTE_UNIT);
try {
receiveBytes(in, outNextWorker, bytes, size);
} catch (Exception e) {
releaseBytes(bytes);
releaseInts(metaArray);
throw e;
}
ByteArray byteArray = new ByteArray();
byteArray.setArray(bytes);
byteArray.setStart(0);
byteArray.setSize(size);
byteArray.setMetaArray(metaArray);
byteArray.setMetaArraySize(metaArraySize);
return byteArray;
}