/**
* Sorts the in-memory buffer
*
* @param write whether to write the sorted buffer to a temp file
* @throws Exception if a problem occurs
*/
protected void sortBuffer(boolean write) throws Exception {
String msg = statusMessagePrefix() + "Sorting in memory buffer....";
if (m_log != null) {
m_log.statusMessage(msg);
m_log.logMessage("[" + getCustomName() + "] " + msg);
}
Collections.sort(m_incrementalBuffer, m_sortComparator);
if (!write) {
return;
}
String tmpDir = m_tempDirectory;
File tempFile = File.createTempFile("Sorter", ".tmp");
if (tmpDir != null && tmpDir.length() > 0) {
try {
tmpDir = m_env.substitute(tmpDir);
File tempDir = new File(tmpDir);
if (tempDir.exists() && tempDir.canWrite()) {
String filename = tempFile.getName();
File newFile = new File(tmpDir + File.separator + filename);
tempFile = newFile;
tempFile.deleteOnExit();
}
} catch (Exception ex) {
}
}
if (!m_stopRequested.get()) {
m_bufferFiles.add(tempFile);
FileOutputStream fos = new FileOutputStream(tempFile);
// GZIPOutputStream gzo = new GZIPOutputStream(fos);
BufferedOutputStream bos = new BufferedOutputStream(fos, 50000);
ObjectOutputStream oos = new ObjectOutputStream(bos);
msg = statusMessagePrefix() + "Writing buffer to temp file " + m_bufferFiles.size() + "...";
if (m_log != null) {
m_log.statusMessage(msg);
m_log.logMessage("[" + getCustomName() + "] " + msg);
}
for (int i = 0; i < m_incrementalBuffer.size(); i++) {
InstanceHolder temp = m_incrementalBuffer.get(i);
temp.m_instance.setDataset(null);
oos.writeObject(temp);
if (i % (m_bufferSizeI / 10) == 0) {
oos.reset();
}
}
bos.flush();
oos.close();
}
m_incrementalBuffer.clear();
}
/**
* Accept and process a data set event
*
* @param e a <code>DataSetEvent</code> value
*/
@Override
public void acceptDataSet(DataSetEvent e) {
m_busy = true;
m_stopRequested.set(false);
if (m_log != null && e.getDataSet().numInstances() > 0) {
m_log.statusMessage(statusMessagePrefix() + "Sorting batch...");
}
if (e.isStructureOnly()) {
// nothing to sort!
// just notify listeners of structure
DataSetEvent d = new DataSetEvent(this, e.getDataSet());
notifyDataListeners(d);
m_busy = false;
return;
}
try {
init(new Instances(e.getDataSet(), 0));
} catch (IllegalArgumentException ex) {
if (m_log != null) {
String message = "ERROR: There is a problem with the incoming instance structure";
// m_log.statusMessage(statusMessagePrefix() + message
// + " - see log for details");
// m_log.logMessage(statusMessagePrefix() + message + " :"
// + ex.getMessage());
stopWithErrorMessage(message, ex);
m_busy = false;
return;
}
}
List<InstanceHolder> instances = new ArrayList<InstanceHolder>();
for (int i = 0; i < e.getDataSet().numInstances(); i++) {
InstanceHolder h = new InstanceHolder();
h.m_instance = e.getDataSet().instance(i);
instances.add(h);
}
Collections.sort(instances, m_sortComparator);
Instances output = new Instances(e.getDataSet(), 0);
for (int i = 0; i < instances.size(); i++) {
output.add(instances.get(i).m_instance);
}
DataSetEvent d = new DataSetEvent(this, output);
notifyDataListeners(d);
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Finished.");
}
m_busy = false;
}
@Override
public void acceptDataSet(DataSetEvent e) {
m_busy = true;
if (m_log != null && !e.isStructureOnly()) {
m_log.statusMessage(statusMessagePrefix() + "Processing batch...");
}
init(new Instances(e.getDataSet(), 0));
if (m_root != null) {
Instances trueBatch = new Instances(e.getDataSet(), 0);
Instances falseBatch = new Instances(e.getDataSet(), 0);
for (int i = 0; i < e.getDataSet().numInstances(); i++) {
Instance current = e.getDataSet().instance(i);
boolean result = m_root.evaluate(current, true);
if (result) {
if (m_indexOfTrueStep >= 0) {
trueBatch.add(current);
}
} else {
if (m_indexOfFalseStep >= 0) {
falseBatch.add(current);
}
}
}
if (m_indexOfTrueStep >= 0) {
DataSetEvent d = new DataSetEvent(this, trueBatch);
((DataSourceListener) m_downstream[m_indexOfTrueStep]).acceptDataSet(d);
}
if (m_indexOfFalseStep >= 0) {
DataSetEvent d = new DataSetEvent(this, falseBatch);
((DataSourceListener) m_downstream[m_indexOfFalseStep]).acceptDataSet(d);
}
} else {
if (m_indexOfTrueStep >= 0) {
DataSetEvent d = new DataSetEvent(this, e.getDataSet());
((DataSourceListener) m_downstream[m_indexOfTrueStep]).acceptDataSet(d);
}
}
if (m_log != null && !e.isStructureOnly()) {
m_log.statusMessage(statusMessagePrefix() + "Finished");
}
m_busy = false;
}
/**
* Stops the step (and upstream ones) and then prints an error message and optional exception
* message
*
* @param error the error message to print
* @param ex the optional exception
*/
protected void stopWithErrorMessage(String error, Exception ex) {
stop();
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + error + " - see log for details");
m_log.logMessage(statusMessagePrefix() + error + (ex != null ? " " + ex.getMessage() : ""));
}
}
@Override
public void stop() {
if (m_listenee != null) {
if (m_listenee instanceof BeanCommon) {
((BeanCommon) m_listenee).stop();
}
}
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Stopped");
}
m_busy = false;
}
@Override
public void acceptInstance(InstanceEvent e) {
m_busy = true;
if (e.getStatus() == InstanceEvent.FORMAT_AVAILABLE) {
Instances structure = e.getStructure();
init(structure);
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Processing stream...");
}
// notify listeners of structure
m_ie.setStructure(structure);
if (m_indexOfTrueStep >= 0) {
((InstanceListener) m_downstream[m_indexOfTrueStep]).acceptInstance(m_ie);
}
if (m_indexOfFalseStep >= 0) {
((InstanceListener) m_downstream[m_indexOfFalseStep]).acceptInstance(m_ie);
}
} else {
Instance inst = e.getInstance();
m_ie.setStatus(e.getStatus());
if (inst == null || e.getStatus() == InstanceEvent.BATCH_FINISHED) {
if (inst != null) {
// evaluate and notify
boolean result = true;
if (m_root != null) {
result = m_root.evaluate(inst, true);
}
if (result) {
if (m_indexOfTrueStep >= 0) {
m_ie.setInstance(inst);
((InstanceListener) m_downstream[m_indexOfTrueStep]).acceptInstance(m_ie);
}
if (m_indexOfFalseStep >= 0) {
m_ie.setInstance(null);
((InstanceListener) m_downstream[m_indexOfFalseStep]).acceptInstance(m_ie);
}
} else {
if (m_indexOfFalseStep >= 0) {
m_ie.setInstance(inst);
((InstanceListener) m_downstream[m_indexOfFalseStep]).acceptInstance(m_ie);
}
if (m_indexOfTrueStep >= 0) {
m_ie.setInstance(null);
((InstanceListener) m_downstream[m_indexOfTrueStep]).acceptInstance(m_ie);
}
}
} else {
// notify both of end of stream
m_ie.setInstance(null);
if (m_indexOfTrueStep >= 0) {
((InstanceListener) m_downstream[m_indexOfTrueStep]).acceptInstance(m_ie);
}
if (m_indexOfFalseStep >= 0) {
((InstanceListener) m_downstream[m_indexOfFalseStep]).acceptInstance(m_ie);
}
}
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Finished");
}
} else {
boolean result = true;
if (m_root != null) {
result = m_root.evaluate(inst, true);
}
m_ie.setInstance(inst);
if (result) {
if (m_indexOfTrueStep >= 0) {
((InstanceListener) m_downstream[m_indexOfTrueStep]).acceptInstance(m_ie);
}
} else {
if (m_indexOfFalseStep >= 0) {
((InstanceListener) m_downstream[m_indexOfFalseStep]).acceptInstance(m_ie);
}
}
}
}
m_busy = false;
}
/**
* Accept and process an instance event
*
* @param e an <code>InstanceEvent</code> value
*/
@Override
public void acceptInstance(InstanceEvent e) {
if (e.getStatus() == InstanceEvent.FORMAT_AVAILABLE) {
m_connectedFormat = e.getStructure();
m_stopRequested.set(false);
try {
init(new Instances(e.getStructure(), 0));
} catch (IllegalArgumentException ex) {
if (m_log != null) {
String message = "ERROR: There is a problem with the incoming instance structure";
// m_log.statusMessage(statusMessagePrefix() + message
// + " - see log for details");
// m_log.logMessage(statusMessagePrefix() + message + " :"
// + ex.getMessage());
stopWithErrorMessage(message, ex);
// m_busy = false;
return;
}
}
String buffSize = m_bufferSize;
try {
buffSize = m_env.substitute(buffSize);
m_bufferSizeI = Integer.parseInt(buffSize);
} catch (Exception ex) {
ex.printStackTrace();
}
m_incrementalBuffer = new ArrayList<InstanceHolder>(m_bufferSizeI);
m_bufferFiles = new ArrayList<File>();
m_streamCounter = 0;
return;
}
m_busy = true;
if (e.getInstance() != null) {
if (m_streamCounter == 0) {
if (m_log != null) {
m_log.statusMessage(statusMessagePrefix() + "Starting streaming sort...");
m_log.logMessage(
"[Sorter] "
+ statusMessagePrefix()
+ " Using streaming buffer size: "
+ m_bufferSizeI);
}
}
InstanceHolder tempH = new InstanceHolder();
tempH.m_instance = e.getInstance();
tempH.m_fileNumber = -1; // unused here
if (m_stringAttIndexes != null) {
copyStringAttVals(tempH);
}
m_incrementalBuffer.add(tempH);
m_streamCounter++;
}
if (e.getInstance() == null || e.getStatus() == InstanceEvent.BATCH_FINISHED) {
emitBufferedInstances();
// thread will set busy to false and report done status when
// complete
return;
} else if (m_incrementalBuffer.size() == m_bufferSizeI) {
// time to sort and write this to a temp file
try {
sortBuffer(true);
} catch (Exception ex) {
String msg = statusMessagePrefix() + "ERROR: unable to write to temp file.";
// if (m_log != null) {
// m_log.statusMessage(msg);
// m_log.logMessage("[" + getCustomName() + "] " + msg);
// }
stopWithErrorMessage(msg, ex);
// ex.printStackTrace();
m_busy = false;
return;
}
}
m_busy = false;
}