DownloadManagerImpl.java
| Index Score | ||
|---|---|---|
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com.limegroup.gnutella |
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FrostWire |
View: Reasons, Metrics, Source Code
These are the metrics that contribute to the Enerjy Score for this file, ranked by impact. So the metrics listed at the top influence the score to a greater extent that the metrics listed at the bottom.
| Metric | Description | |
|---|---|---|
| JAVA0034 | JAVA0034 Missing braces in if statement |  |
| LINE_COMMENT | Number of line comments | |
| JAVA0143 | JAVA0143 Synchronized method | |
| DECL_COMMENTS | Comments in declarations | |
| EXITS | Procedure exits | |
| SIZE | Size of the file in bytes | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| CYCLOMATIC | Cyclomatic complexity | |
| RETURNS | Number of return points from functions | |
| ELOC | Effective lines of code | |
| UNIQUE_OPERANDS | Number of unique operands | |
| PARAMS | Number of formal parameter declarations | |
| PROGRAM_VOCAB | Halstead program vocabulary | |
| OPERATORS | Number of operators | |
| LOGICAL_LINES | Number of statements | |
| LOC | Lines of code | |
| PROGRAM_LENGTH | Halstead program length | |
| LINES | Number of lines in the source file | |
| OPERANDS | Number of operands | |
| BLOCKS | Number of blocks | |
| FUNCTIONS | Number of function declarations | |
| EXEC_COMMENTS | Comments in executable code | |
| COMPARISONS | Number of comparison operators | |
| JAVA0177 | JAVA0177 Variable declaration missing initializer | |
| COMMENTS | Comment lines | |
| JAVA0144 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| BLOCK_COMMENT | Number of block comment lines | |
| JAVA0254 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| UNIQUE_OPERATORS | Number of unique operators | |
| JAVA0119 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| WHITESPACE | Number of whitespace lines | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0130 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0138 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0076 | JAVA0076 Use of magic number | |
| JAVA0020 | JAVA0020 Field name does not have required form | |
| JAVA0173 | JAVA0173 Unused method parameter | |
| LOOPS | Number of loops | |
| NEST_DEPTH | Maximum nesting depth | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
package com.limegroup.gnutella;
import java.io.File;
import java.io.IOException;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.limewire.collection.DualIterator;
import org.limewire.collection.MultiIterable;
import org.limewire.i18n.I18nMarker;
import org.limewire.io.InvalidDataException;
import org.limewire.io.IpPort;
import org.limewire.service.MessageService;
import org.limewire.util.FileUtils;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import com.google.inject.name.Named;
import com.limegroup.bittorrent.BTMetaInfo;
import com.limegroup.bittorrent.TorrentFileSystem;
import com.limegroup.bittorrent.TorrentManager;
import com.limegroup.gnutella.browser.MagnetOptions;
import com.limegroup.gnutella.downloader.CantResumeException;
import com.limegroup.gnutella.downloader.CoreDownloader;
import com.limegroup.gnutella.downloader.CoreDownloaderFactory;
import com.limegroup.gnutella.downloader.DownloaderType;
import com.limegroup.gnutella.downloader.InNetworkDownloader;
import com.limegroup.gnutella.downloader.IncompleteFileManager;
import com.limegroup.gnutella.downloader.MagnetDownloader;
import com.limegroup.gnutella.downloader.ManagedDownloader;
import com.limegroup.gnutella.downloader.PushDownloadManager;
import com.limegroup.gnutella.downloader.PushedSocketHandlerRegistry;
import com.limegroup.gnutella.downloader.RemoteFileDescFactory;
import com.limegroup.gnutella.downloader.ResumeDownloader;
import com.limegroup.gnutella.downloader.StoreDownloader;
import com.limegroup.gnutella.downloader.serial.BTMetaInfoMemento;
import com.limegroup.gnutella.downloader.serial.DownloadMemento;
import com.limegroup.gnutella.downloader.serial.DownloadSerializer;
import com.limegroup.gnutella.library.SharingUtils;
import com.limegroup.gnutella.messages.BadPacketException;
import com.limegroup.gnutella.messages.QueryReply;
import com.limegroup.gnutella.messages.QueryRequest;
import com.limegroup.gnutella.search.HostData;
import com.limegroup.gnutella.settings.DownloadSettings;
import com.limegroup.gnutella.settings.UpdateSettings;
import com.limegroup.gnutella.version.DownloadInformation;
@Singleton
public class DownloadManagerImpl implements DownloadManager {
private static final Log LOG = LogFactory.getLog(DownloadManagerImpl.class);
/** The time in milliseconds between checkpointing downloads.dat. The more
* often this is written, the less the lost data during a crash, but the
* greater the chance that downloads.dat itself is corrupt. */
private int SNAPSHOT_CHECKPOINT_TIME=30*1000; //30 seconds
/** The list of all ManagedDownloader's attempting to download.
* INVARIANT: active.size()<=slots() && active contains no duplicates
* LOCKING: obtain this' monitor */
private final List <CoreDownloader> active=new LinkedList<CoreDownloader>();
/** The list of all queued ManagedDownloader.
* INVARIANT: waiting contains no duplicates
* LOCKING: obtain this' monitor */
private final List <CoreDownloader> waiting=new LinkedList<CoreDownloader>();
private final MultiIterable<CoreDownloader> activeAndWaiting =
new MultiIterable<CoreDownloader>(active,waiting);
/**
* Whether or not the GUI has been init'd.
*/
private volatile boolean downloadsReadFromDisk = false;
/** The number if IN-NETWORK active downloaders. We don't count these when
* determing how many downloaders are active.
*/
private int innetworkCount = 0;
/**
* The number of active store downloads. These are counted when determining
* how many downloaders are active
*/
private int storeDownloadCount = 0;
/**
* The number of times we've been bandwidth measures
*/
private int numMeasures = 0;
/**
* The average bandwidth over all downloads.
* This is only counted while downloads are active.
*/
private float averageBandwidth = 0;
/** The last measured bandwidth, as counted from measureBandwidth. */
private volatile float lastMeasuredBandwidth;
/**
* The runnable that pumps inactive downloads to the correct state.
*/
private Runnable _waitingPump;
private final NetworkManager networkManager;
private final DownloadCallback innetworkCallback;
private final Provider<DownloadCallback> downloadCallback;
private final Provider<MessageRouter> messageRouter;
private final ScheduledExecutorService backgroundExecutor;
private final Provider<TorrentManager> torrentManager;
private final Provider<PushDownloadManager> pushDownloadManager;
private final CoreDownloaderFactory coreDownloaderFactory;
private final DownloadSerializer downloadSerializer;
private final IncompleteFileManager incompleteFileManager;
private final RemoteFileDescFactory remoteFileDescFactory;
@Inject
public DownloadManagerImpl(NetworkManager networkManager,
@Named("inNetwork") DownloadCallback innetworkCallback,
Provider<DownloadCallback> downloadCallback,
Provider<MessageRouter> messageRouter,
@Named("backgroundExecutor") ScheduledExecutorService backgroundExecutor,
Provider<TorrentManager> torrentManager,
Provider<PushDownloadManager> pushDownloadManager,
CoreDownloaderFactory coreDownloaderFactory,
DownloadSerializer downloaderSerializer,
IncompleteFileManager incompleteFileManager,
RemoteFileDescFactory remoteFileDescFactory) {
this.networkManager = networkManager;
this.innetworkCallback = innetworkCallback;
this.downloadCallback = downloadCallback;
this.messageRouter = messageRouter;
this.backgroundExecutor = backgroundExecutor;
this.torrentManager = torrentManager;
this.pushDownloadManager = pushDownloadManager;
this.coreDownloaderFactory = coreDownloaderFactory;
this.downloadSerializer = downloaderSerializer;
this.incompleteFileManager = incompleteFileManager;
this.remoteFileDescFactory = remoteFileDescFactory;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#register(com.limegroup.gnutella.downloader.PushedSocketHandlerRegistry)
*/
// DO NOT REMOVE! Guice calls this because of the @Inject
@Inject
public void register(PushedSocketHandlerRegistry registry) {
registry.register(this);
}
//////////////////////// Creation and Saving /////////////////////////
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#initialize()
*/
public void initialize() {
scheduleWaitingPump();
}
/**
* Adds a new downloader to this manager.
* @param downloader
*/
public void addNewDownloader(CoreDownloader downloader) {
synchronized(this) {
waiting.add(downloader);
downloader.initialize();
callback(downloader).addDownload(downloader);
}
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#postGuiInit()
*/
public void loadSavedDownloadsAndScheduleWriting() {
loadSavedDownloads();
scheduleSnapshots();
}
public void loadSavedDownloads() {
boolean failedAll = true;
boolean failedSome = false;
List<DownloadMemento> mementos;
try {
mementos = downloadSerializer.readFromDisk();
if(mementos.isEmpty())
failedAll = false;
} catch(IOException ioex) {
mementos = Collections.emptyList();
}
for(DownloadMemento memento : mementos) {
CoreDownloader coreDownloader = prepareMemento(memento);
if(coreDownloader != null) {
failedAll = false;
addNewDownloader(coreDownloader);
} else {
failedSome = true;
}
}
downloadsReadFromDisk = true;
if(failedAll)
MessageService.showError(I18nMarker.marktr("Sorry, FrostWire couldn't read your old downloads. You can restart them by going to your Library, viewing your 'Incomplete Files', and clicking to 'Resume' your downloads."));
else if(failedSome)
MessageService.showError(I18nMarker.marktr("Sorry, FrostWire couldn't read some of your old downloads. You can restart them by going to your Library, viewing your 'Incomplete Files', and clicking to 'Resume' your downloads."));
}
public CoreDownloader prepareMemento(DownloadMemento memento) {
try {
return coreDownloaderFactory.createFromMemento(memento);
} catch(InvalidDataException ide) {
LOG.warn("Unable to read download from memento: " + memento, ide);
return null;
}
}
public void scheduleSnapshots() {
Runnable checkpointer=new Runnable() {
public void run() {
if (downloadsInProgress() > 0) { //optimization
writeSnapshot();
}
}
};
backgroundExecutor.scheduleWithFixedDelay(checkpointer,
SNAPSHOT_CHECKPOINT_TIME,
SNAPSHOT_CHECKPOINT_TIME, TimeUnit.MILLISECONDS);
}
public void writeSnapshot() {
List<DownloadMemento> mementos;
synchronized(this) {
mementos = new ArrayList<DownloadMemento>(active.size() + waiting.size());
for(CoreDownloader downloader : activeAndWaiting) {
mementos.add(downloader.toMemento());
}
}
downloadSerializer.writeToDisk(mementos);
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#isGUIInitd()
*/
public boolean isSavedDownloadsLoaded() {
return downloadsReadFromDisk;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#hasInNetworkDownload()
*/
public synchronized boolean hasInNetworkDownload() {
if(innetworkCount > 0)
return true;
for(Iterator<CoreDownloader> i = waiting.iterator(); i.hasNext(); ) {
if(i.next().getDownloadType() == DownloaderType.INNETWORK)
return true;
}
return false;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#killDownloadersNotListed(java.util.Collection)
*/
public synchronized void killDownloadersNotListed(Collection<? extends DownloadInformation> updates) {
if (updates == null)
return;
Set<String> urns = new HashSet<String>(updates.size());
for(DownloadInformation ui : updates)
urns.add(ui.getUpdateURN().httpStringValue());
for (Iterator<CoreDownloader> iter = new DualIterator<CoreDownloader>(waiting.iterator(),active.iterator());
iter.hasNext();) {
CoreDownloader d = iter.next();
if (d.getDownloadType() == DownloaderType.INNETWORK &&
!urns.contains(d.getSha1Urn().httpStringValue()))
d.stop();
}
Set<String> hopeless = UpdateSettings.FAILED_UPDATES.getValue();
hopeless.retainAll(urns);
UpdateSettings.FAILED_UPDATES.setValue(hopeless);
}
PushDownloadManager getPushManager() {
return pushDownloadManager.get();
}
/**
* Delegates the incoming socket out to BrowseHostHandler & then attempts to assign it
* to any ManagedDownloader.
*
* Closes the socket if neither BrowseHostHandler nor any ManagedDownloaders wanted it.
*
* @param file
* @param index
* @param clientGUID
* @param socket
*/
private synchronized boolean handleIncomingPush(String file, int index, byte [] clientGUID, Socket socket) {
boolean handled = false;
for (CoreDownloader md : activeAndWaiting) {
if (! (md instanceof ManagedDownloader))
continue; // pushes apply to gnutella downloads only
ManagedDownloader mmd = (ManagedDownloader)md;
if (mmd.acceptDownload(file, socket, index, clientGUID))
handled = true;
}
return handled;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#acceptPushedSocket(java.lang.String, int, byte[], java.net.Socket)
*/
public boolean acceptPushedSocket(String file, int index,
byte[] clientGUID, Socket socket) {
return handleIncomingPush(file, index, clientGUID, socket);
}
public void scheduleWaitingPump() {
if(_waitingPump != null)
return;
_waitingPump = new Runnable() {
public void run() {
pumpDownloads();
}
};
backgroundExecutor.scheduleWithFixedDelay(_waitingPump,
1000,
1000, TimeUnit.MILLISECONDS);
}
/**
* Pumps through each waiting download, either removing it because it was
* stopped, or adding it because there's an active slot and it requires
* attention.
*/
protected synchronized void pumpDownloads() {
int index = 1;
for(Iterator<CoreDownloader> i = waiting.iterator(); i.hasNext(); ) {
CoreDownloader md = i.next();
if(md.isAlive()) {
continue;
} else if(md.shouldBeRemoved()) {
i.remove();
cleanupCompletedDownload(md, false);
}
// handle downloads from LWS seperately, only allow 1 at a time
else if( storeDownloadCount == 0 && md.getDownloadType() == DownloaderType.STORE ) {
i.remove();
storeDownloadCount++;
active.add(md);
md.startDownload();
} else if(hasFreeSlot() && (md.shouldBeRestarted()) && (md.getDownloadType() != DownloaderType.STORE)) {
i.remove();
if(md.getDownloadType() == DownloaderType.INNETWORK)
innetworkCount++;
active.add(md);
md.startDownload();
} else {
if(md.isQueuable())
md.setInactivePriority(index++);
md.handleInactivity();
}
}
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#isIncomplete(com.limegroup.gnutella.URN)
*/
public boolean isIncomplete(URN urn) {
return incompleteFileManager.getFileForUrn(urn) != null;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#isActivelyDownloading(com.limegroup.gnutella.URN)
*/
public boolean isActivelyDownloading(URN urn) {
Downloader md = getDownloaderForURN(urn);
if(md == null)
return false;
switch(md.getState()) {
case QUEUED:
case BUSY:
case ABORTED:
case GAVE_UP:
case DISK_PROBLEM:
case CORRUPT_FILE:
case REMOTE_QUEUED:
case WAITING_FOR_USER:
return false;
default:
return true;
}
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getIncompleteFileManager()
*/
public IncompleteFileManager getIncompleteFileManager() {
return incompleteFileManager;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#downloadsInProgress()
*/
public synchronized int downloadsInProgress() {
return active.size() + waiting.size();
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getNumIndividualDownloaders()
*/
public synchronized int getNumIndividualDownloaders() {
int ret = 0;
for (Iterator<CoreDownloader> iter=active.iterator(); iter.hasNext(); ) { //active
Object next = iter.next();
if (! (next instanceof ManagedDownloader))
continue; // TODO: count torrents separately
ManagedDownloader md=(ManagedDownloader)next;
ret += md.getNumDownloaders();
}
return ret;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getNumActiveDownloads()
*/
public synchronized int getNumActiveDownloads() {
return active.size() - innetworkCount - storeDownloadCount;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getNumWaitingDownloads()
*/
public synchronized int getNumWaitingDownloads() {
return waiting.size();
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getDownloaderForURN(com.limegroup.gnutella.URN)
*/
public synchronized Downloader getDownloaderForURN(URN sha1) {
for (CoreDownloader md : activeAndWaiting) {
if (md.getSha1Urn() != null && sha1.equals(md.getSha1Urn()))
return md;
}
return null;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getDownloaderForURNString(java.lang.String)
*/
public synchronized Downloader getDownloaderForURNString(String urn) {
for (CoreDownloader md : activeAndWaiting) {
if (md.getSha1Urn() != null && urn.equals(md.getSha1Urn().toString()))
return md;
}
return null;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getDownloaderForIncompleteFile(java.io.File)
*/
public synchronized Downloader getDownloaderForIncompleteFile(File file) {
for (CoreDownloader dl : activeAndWaiting) {
if (dl.conflictsWithIncompleteFile(file)) {
return dl;
}
}
return null;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#isGuidForQueryDownloading(com.limegroup.gnutella.GUID)
*/
public synchronized boolean isGuidForQueryDownloading(GUID guid) {
for (CoreDownloader md : activeAndWaiting) {
GUID dGUID = md.getQueryGUID();
if ((dGUID != null) && (dGUID.equals(guid)))
return true;
}
return false;
}
void clearAllDownloads() {
List<Downloader> buf;
synchronized(this) {
buf = new ArrayList<Downloader>(active.size() + waiting.size());
buf.addAll(active);
buf.addAll(waiting);
active.clear();
waiting.clear();
}
for(Downloader md : buf )
md.stop();
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#download(com.limegroup.gnutella.RemoteFileDesc[], java.util.List, com.limegroup.gnutella.GUID, boolean, java.io.File, java.lang.String)
*/
public synchronized Downloader download(RemoteFileDesc[] files,
List<? extends RemoteFileDesc> alts, GUID queryGUID,
boolean overwrite, File saveDir,
String fileName)
throws SaveLocationException {
String fName = getFileName(files, fileName);
if (conflicts(files, new File(saveDir,fName))) {
throw new SaveLocationException
(SaveLocationException.FILE_ALREADY_DOWNLOADING,
new File(fName != null ? fName : ""));
}
//Purge entries from incompleteFileManager that have no corresponding
//file on disk. This protects against stupid users who delete their
//temporary files while FrostWire is running, either through the command
//prompt or the library. Note that you could optimize this by just
//purging files corresponding to the current download, but it's not
//worth it.
incompleteFileManager.purge();
//Start download asynchronously. This automatically moves downloader to
//active if it can.
ManagedDownloader downloader =
coreDownloaderFactory.createManagedDownloader(files,
queryGUID, saveDir, fileName, overwrite);
initializeDownload(downloader);
//Now that the download is started, add the sources w/o caching
downloader.addDownload(alts,false);
return downloader;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#download(com.limegroup.gnutella.browser.MagnetOptions, boolean, java.io.File, java.lang.String)
*/
public synchronized Downloader download(MagnetOptions magnet,
boolean overwrite,
File saveDir,
String fileName)
throws IllegalArgumentException, SaveLocationException {
if (!magnet.isDownloadable())
throw new IllegalArgumentException("magnet not downloadable");
//remove entry from IFM if the incomplete file was deleted.
incompleteFileManager.purge();
if (fileName == null) {
fileName = magnet.getFileNameForSaving();
}
if (conflicts(magnet.getSHA1Urn(), 0, new File(saveDir,fileName))) {
throw new SaveLocationException
(SaveLocationException.FILE_ALREADY_DOWNLOADING, new File(fileName));
}
//Note: If the filename exists, it would be nice to check that we are
//not already downloading the file by calling conflicts with the
//filename...the problem is we cannot do this effectively without the
//size of the file (atleast, not without being risky in assuming that
//two files with the same name are the same file). So for now we will
//just leave it and download the same file twice.
//Instantiate downloader, validating incompleteFile first.
MagnetDownloader downloader =
coreDownloaderFactory.createMagnetDownloader( magnet,
overwrite, saveDir, fileName);
initializeDownload(downloader);
return downloader;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#downloadFromStore(com.limegroup.gnutella.RemoteFileDesc, boolean, java.io.File, java.lang.String)
*/
public synchronized Downloader downloadFromStore( RemoteFileDesc rfd,
boolean overwrite,
File saveDir,
String fileName)
throws IllegalArgumentException, SaveLocationException {
//Purge entries from incompleteFileManager that have no corresponding
//file on disk. This protects against stupid users who delete their
//temporary files while FrostWire is running, either through the command
//prompt or the library. Note that you could optimize this by just
//purging files corresponding to the current download, but it's not
//worth it.
incompleteFileManager.purge();
if (conflicts(rfd.getSHA1Urn(), 0, new File(saveDir,fileName))) {
throw new SaveLocationException
(SaveLocationException.FILE_ALREADY_DOWNLOADING, new File(fileName));
}
//Start download asynchronously. This automatically moves downloader to
//active if it can.
StoreDownloader downloader =
coreDownloaderFactory.createStoreDownloader(rfd,
saveDir, fileName, overwrite);
initializeDownload(downloader);
return downloader;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#download(java.io.File)
*/
public synchronized Downloader download(File incompleteFile)
throws CantResumeException, SaveLocationException {
if (conflictsWithIncompleteFile(incompleteFile)) {
throw new SaveLocationException
(SaveLocationException.FILE_ALREADY_DOWNLOADING, incompleteFile);
}
if (IncompleteFileManager.isTorrentFolder(incompleteFile))
return resumeTorrentDownload(incompleteFile);
//Check if file exists. TODO3: ideally we'd pass ALL conflicting files
//to the GUI, so they know what they're overwriting.
//if (! overwrite) {
// try {
// File downloadDir=SettingsManager.instance().getSaveDirectory();
// File completeFile=new File(
// downloadDir,
// incompleteFileManager.getCompletedName(incompleteFile));
// if (completeFile.exists())
// throw new FileExistsException(filename);
// } catch (IllegalArgumentException e) {
// throw new CantResumeException(incompleteFile.getName());
// }
//}
//Purge entries from incompleteFileManager that have no corresponding
//file on disk. This protects against stupid users who delete their
//temporary files while FrostWire is running, either through the command
//prompt or the library. Note that you could optimize this by just
//purging files corresponding to the current download, but it's not
//worth it.
incompleteFileManager.purge();
//Instantiate downloader, validating incompleteFile first.
ResumeDownloader downloader=null;
try {
incompleteFile = FileUtils.getCanonicalFile(incompleteFile);
String name=IncompleteFileManager.getCompletedName(incompleteFile);
long size= IncompleteFileManager.getCompletedSize(incompleteFile);
downloader = coreDownloaderFactory.createResumeDownloader(
incompleteFile,
name,
size);
} catch (IllegalArgumentException e) {
throw new CantResumeException(incompleteFile.getName());
} catch (IOException ioe) {
throw new CantResumeException(incompleteFile.getName());
}
initializeDownload(downloader);
return downloader;
}
private Downloader resumeTorrentDownload(File torrentFolder)
throws CantResumeException, SaveLocationException {
File infohash = null;
for (File f : torrentFolder.listFiles()){
if (f.getName().startsWith(".dat")) {
infohash = f;
break;
}
}
String name = IncompleteFileManager.getCompletedName(torrentFolder);
if(infohash == null)
throw new CantResumeException(name);
BTMetaInfoMemento memento = null;
try {
Object infoObj = FileUtils.readObject(infohash.getAbsolutePath());
memento = (BTMetaInfoMemento)infoObj;
} catch (Throwable bad) {
throw new CantResumeException(name);
}
BTMetaInfo info;
try {
info = new BTMetaInfo(memento);
} catch(InvalidDataException ide) {
throw new CantResumeException(name);
}
Downloader ret = downloadTorrent(info, false);
if (ret.isResumable())
ret.resume();
return ret;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#download(com.limegroup.gnutella.version.DownloadInformation, long)
*/
public synchronized Downloader download(DownloadInformation info, long now)
throws SaveLocationException {
File dir = SharingUtils.PREFERENCE_SHARE;
dir.mkdirs();
File f = new File(dir, info.getUpdateFileName());
if(conflicts(info.getUpdateURN(), (int)info.getSize(), f))
throw new SaveLocationException(SaveLocationException.FILE_ALREADY_DOWNLOADING, f);
incompleteFileManager.purge();
ManagedDownloader d = coreDownloaderFactory.createInNetworkDownloader(
info, dir, now);
initializeDownload(d);
return d;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#downloadTorrent(com.limegroup.bittorrent.BTMetaInfo, boolean)
*/
public synchronized Downloader downloadTorrent(BTMetaInfo info, boolean overwrite)
throws SaveLocationException {
TorrentFileSystem system = info.getFileSystem();
checkActiveAndWaiting(info.getURN(), system);
if (!overwrite)
checkTargetLocation(system, overwrite);
else
torrentManager.get().killTorrentForFile(system.getCompleteFile());
CoreDownloader ret = coreDownloaderFactory.createBTDownloader(info);
initializeDownload(ret);
return ret;
}
private void checkTargetLocation(TorrentFileSystem info, boolean overwrite)
throws SaveLocationException{
for (File f : info.getFilesAndFolders()) {
if (f.exists())
throw new SaveLocationException
(SaveLocationException.FILE_ALREADY_EXISTS, f);
}
}
private void checkActiveAndWaiting(URN urn, TorrentFileSystem system)
throws SaveLocationException {
for (CoreDownloader current : activeAndWaiting) {
if (urn.equals(current.getSha1Urn())) {
// this is the place to add new trackers eventually.
throw new SaveLocationException
(SaveLocationException.FILE_ALREADY_DOWNLOADING, system.getCompleteFile());
}
for (File f : system.getFilesAndFolders()) {
if (current.conflictsSaveFile(f)) {
throw new SaveLocationException
(SaveLocationException.FILE_IS_ALREADY_DOWNLOADED_TO, f);
}
}
}
}
/**
* Performs common tasks for initializing the download.
* 1) Initializes the downloader.
* 2) Adds the download to the waiting list.
* 3) Notifies the callback about the new downloader.
* 4) Writes the new snapshot out to disk.
*/
private void initializeDownload(CoreDownloader md) {
md.initialize();
waiting.add(md);
callback(md).addDownload(md);
backgroundExecutor.execute(new Runnable() {
public void run() {
writeSnapshot(); // Save state for crash recovery.
}
});
}
/**
* Returns the callback that should be used for the given md.
*/
private DownloadCallback callback(Downloader md) {
return (md instanceof InNetworkDownloader) ? innetworkCallback : downloadCallback.get();
}
/**
* Returns true if there already exists a download for the same file.
* <p>
* Same file means: same urn, or as fallback same filename + same filesize
* @param rfds
* @return
*/
private boolean conflicts(RemoteFileDesc[] rfds, File... fileName) {
URN urn = null;
for (int i = 0; i < rfds.length && urn == null; i++) {
urn = rfds[0].getSHA1Urn();
}
return conflicts(urn, rfds[0].getSize(), fileName);
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#conflicts(com.limegroup.gnutella.URN, long, java.io.File)
*/
public boolean conflicts(URN urn, long fileSize, File... fileName) {
if (urn == null && fileSize == 0) {
return false;
}
synchronized (this) {
for (CoreDownloader md : activeAndWaiting) {
if (md.conflicts(urn, fileSize, fileName))
return true;
}
return false;
}
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#isSaveLocationTaken(java.io.File)
*/
public synchronized boolean isSaveLocationTaken(File candidateFile) {
for (CoreDownloader md : activeAndWaiting) {
if (md.conflictsSaveFile(candidateFile))
return true;
}
return false;
}
private synchronized boolean conflictsWithIncompleteFile(File incompleteFile) {
for (CoreDownloader md : activeAndWaiting) {
if (md.conflictsWithIncompleteFile(incompleteFile))
return true;
}
return false;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#handleQueryReply(com.limegroup.gnutella.messages.QueryReply)
*/
public void handleQueryReply(QueryReply qr) {
// first check if the qr is of 'sufficient quality', if not just
// short-circuit.
if (qr.calculateQualityOfService(
!networkManager.acceptedIncomingConnection(), networkManager) < 1)
return;
List<Response> responses;
HostData data;
try {
responses = qr.getResultsAsList();
data = qr.getHostData();
} catch(BadPacketException bpe) {
return; // bad packet, do nothing.
}
addDownloadWithResponses(responses, data);
}
/**
* Iterates through all responses seeing if they can be matched
* up to any existing downloaders, adding them as possible
* sources if they do.
*/
private void addDownloadWithResponses(List<? extends Response> responses, HostData data) {
if(responses == null)
throw new NullPointerException("null responses");
if(data == null)
throw new NullPointerException("null hostdata");
// need to synch because active and waiting are not thread safe
List<CoreDownloader> downloaders = new ArrayList<CoreDownloader>(active.size() + waiting.size());
synchronized (this) {
// add to all downloaders, even if they are waiting....
downloaders.addAll(active);
downloaders.addAll(waiting);
}
// short-circuit.
if(downloaders.isEmpty())
return;
//For each response i, offer it to each downloader j. Give a response
// to at most one downloader.
// TODO: it's possible that downloader x could accept response[i] but
//that would cause a conflict with downloader y. Check for this.
for(Response r : responses) {
// Don't bother with making XML from the EQHD.
RemoteFileDesc rfd = r.toRemoteFileDesc(data, remoteFileDescFactory);
for(Downloader current : downloaders) {
if ( !(current instanceof ManagedDownloader))
continue; // can't add sources to torrents yet
ManagedDownloader currD = (ManagedDownloader) current;
// If we were able to add this specific rfd,
// add any alternates that this response might have
// also.
if (currD.addDownload(rfd, true)) {
for(IpPort ipp : r.getLocations()) {
// don't cache alts.
currD.addDownload(remoteFileDescFactory.createRemoteFileDesc(rfd, ipp), false);
}
break;
}
}
}
}
// //////////// Callback Methods for ManagedDownloaders ///////////////////
/** @requires this monitor' held by caller */
private boolean hasFreeSlot() {
return active.size() - innetworkCount - storeDownloadCount
< DownloadSettings.MAX_SIM_DOWNLOAD.getValue();
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#remove(com.limegroup.gnutella.downloader.CoreDownloader, boolean)
*/
public synchronized void remove(CoreDownloader downloader,
boolean completed) {
boolean isRemoved = active.remove(downloader);
if(downloader.getDownloadType() == DownloaderType.INNETWORK)
innetworkCount--;
// make sure an active download was removed prior to decrementing this index
if(downloader.getDownloadType() == DownloaderType.STORE && isRemoved)
storeDownloadCount--;
waiting.remove(downloader);
if(completed)
cleanupCompletedDownload(downloader, true);
else
waiting.add(downloader);
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#bumpPriority(com.limegroup.gnutella.Downloader, boolean, int)
*/
public synchronized void bumpPriority(Downloader downl,
boolean up, int amt) {
CoreDownloader downloader = (CoreDownloader)downl;
int idx = waiting.indexOf(downloader);
if(idx == -1)
return;
if(up && idx != 0) {
waiting.remove(idx);
if (amt > idx)
amt = idx;
if (amt != 0)
waiting.add(idx - amt, downloader);
else
waiting.add(0, downloader); //move to top of list
} else if(!up && idx != waiting.size() - 1) {
waiting.remove(idx);
if (amt != 0) {
amt += idx;
if (amt > waiting.size())
amt = waiting.size();
waiting.add(amt, downloader);
} else {
waiting.add(downloader); //move to bottom of list
}
}
}
/**
* Cleans up the given Downloader after completion.
*
* If ser is true, also writes a snapshot to the disk.
*/
private void cleanupCompletedDownload(CoreDownloader dl, boolean ser) {
dl.finish();
if (dl.getQueryGUID() != null)
messageRouter.get().downloadFinished(dl.getQueryGUID());
callback(dl).removeDownload(dl);
//Save this' state to disk for crash recovery.
if(ser)
writeSnapshot();
// Enable auto shutdown
if(active.isEmpty() && waiting.isEmpty())
callback(dl).downloadsComplete();
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#sendQuery(com.limegroup.gnutella.downloader.ManagedDownloader, com.limegroup.gnutella.messages.QueryRequest)
*/
public void sendQuery(QueryRequest query) {
messageRouter.get().sendDynamicQuery(query);
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#measureBandwidth()
*/
public void measureBandwidth() {
List<CoreDownloader> activeCopy;
synchronized(this) {
activeCopy = new ArrayList<CoreDownloader>(active);
}
float currentTotal = 0f;
boolean c = false;
for (BandwidthTracker bt : activeCopy) {
if (bt instanceof InNetworkDownloader)
continue;
c = true;
bt.measureBandwidth();
currentTotal += bt.getAverageBandwidth();
}
if ( c ) {
synchronized(this) {
averageBandwidth = ( (averageBandwidth * numMeasures) + currentTotal )
/ ++numMeasures;
}
}
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getMeasuredBandwidth()
*/
public float getMeasuredBandwidth() {
List<CoreDownloader> activeCopy;
synchronized(this) {
activeCopy = new ArrayList<CoreDownloader>(active);
}
float sum=0;
for (BandwidthTracker bt : activeCopy) {
if (bt instanceof InNetworkDownloader)
continue;
float curr = 0;
try{
curr = bt.getMeasuredBandwidth();
} catch(InsufficientDataException ide) {
curr = 0;//insufficient data? assume 0
}
sum+=curr;
}
lastMeasuredBandwidth = sum;
return sum;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getAverageBandwidth()
*/
public synchronized float getAverageBandwidth() {
return averageBandwidth;
}
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getLastMeasuredBandwidth()
*/
public float getLastMeasuredBandwidth() {
return lastMeasuredBandwidth;
}
private String getFileName(RemoteFileDesc[] rfds, String fileName) {
for (int i = 0; i < rfds.length && fileName == null; i++) {
fileName = rfds[i].getFileName();
}
return fileName;
}
// ---------------------------------------------------------------
// Implementation of LWSIntegrationServicesDelegate
/* (non-Javadoc)
* @see com.limegroup.gnutella.DownloadMI#getAllDownloaders()
*/
public final Iterable<CoreDownloader> getAllDownloaders() {
return activeAndWaiting;
}
}
The table below shows all metrics for DownloadManagerImpl.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 132.00 | Number of blocks | |
| BLOCK_COMMENT | 105.00 | Number of block comment lines | |
| COMMENTS | 253.00 | Comment lines | |
| COMMENT_DENSITY | 0.43 | Comment density | |
| COMPARISONS | 86.00 | Number of comparison operators | |
| CYCLOMATIC | 163.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 58.00 | Comments in declarations | |
| DOC_COMMENT | 78.00 | Number of javadoc comment lines | |
| ELOC | 592.00 | Effective lines of code | |
| EXEC_COMMENTS | 24.00 | Comments in executable code | |
| EXITS | 138.00 | Procedure exits | |
| FUNCTIONS | 60.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 95.88 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 182.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 0.00 | JAVA0002 Package name does not begin with a top level domain name or country code | |
| JAVA0003 | 0.00 | JAVA0003 Minimize use of on-demand (.*) imports | |
| JAVA0004 | 0.00 | JAVA0004 Unnecessary import from java.lang | |
| JAVA0005 | 0.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 0.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 0.00 | JAVA0008 Empty catch block | |
| JAVA0009 | 0.00 | JAVA0009 Protected member in final class | |
| JAVA0010 | 0.00 | JAVA0010 Non-instantiable class does not contain a non-private static member | |
| JAVA0011 | 0.00 | JAVA0011 Abstract class does not contain an abstract method | |
| JAVA0012 | 0.00 | JAVA0012 Non-constructor method with same name as declaring class | |
| JAVA0013 | 0.00 | JAVA0013 Non-blank final field is not static | |
| JAVA0014 | 0.00 | JAVA0014 Class with only static members has non-private constructor | |
| JAVA0015 | 0.00 | JAVA0015 Package class contains public nested type | |
| JAVA0016 | 0.00 | JAVA0016 Abstract class contains public constructor | |
| JAVA0017 | 0.00 | JAVA0017 Class name does not have required form | |
| JAVA0018 | 0.00 | JAVA0018 Method name does not have required form | |
| JAVA0019 | 0.00 | JAVA0019 Interface name does not have required form | |
| JAVA0020 | 1.00 | JAVA0020 Field name does not have required form | |
| JAVA0021 | 0.00 | JAVA0021 Interface method name does not have required form | |
| JAVA0022 | 0.00 | JAVA0022 Static final field name does not have required form | |
| JAVA0023 | 0.00 | JAVA0023 Empty finalize method | |
| JAVA0024 | 0.00 | JAVA0024 Empty class | |
| JAVA0025 | 0.00 | JAVA0025 Method override is empty | |
| JAVA0026 | 0.00 | JAVA0026 Finalize method with parameters | |
| JAVA0029 | 0.00 | JAVA0029 Private method not used | |
| JAVA0030 | 0.00 | JAVA0030 Private field not used | |
| JAVA0031 | 0.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 0.00 | JAVA0032 Switch statement missing default | |
| JAVA0033 | 0.00 | JAVA0033 default: not last case in switch statement | |
| JAVA0034 | 47.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 0.00 | JAVA0035 Missing braces in for statement | |
| JAVA0036 | 0.00 | JAVA0036 Missing braces in while statement | |
| JAVA0038 | 0.00 | JAVA0038 Non-case label in switch statement | |
| JAVA0039 | 0.00 | JAVA0039 Break statement with label | |
| JAVA0040 | 0.00 | JAVA0040 Switch statement contains N cases (maximum: M) | |
| JAVA0041 | 0.00 | JAVA0041 Nested synchronized block | |
| JAVA0042 | 0.00 | JAVA0042 Empty synchronized statement | |
| JAVA0043 | 0.00 | JAVA0043 Inner class does not use outer class | |
| JAVA0044 | 0.00 | JAVA0044 Serializable class with no instance variables | |
| JAVA0045 | 0.00 | JAVA0045 Serializable class with only transient fields | |
| JAVA0046 | 0.00 | JAVA0046 Name of class not derived from Exception ends with 'Exception' | |
| JAVA0047 | 0.00 | JAVA0047 Serializable class derives from invalid base class | |
| JAVA0048 | 0.00 | JAVA0048 Name of class derived from Exception does not end with 'Exception' | |
| JAVA0049 | 0.00 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0050 | 0.00 | JAVA0050 Class derives from java.lang.Error | |
| JAVA0051 | 0.00 | JAVA0051 Class derives from java.lang.RuntimeException | |
| JAVA0052 | 0.00 | JAVA0052 Class derives from java.lang.Throwable | |
| JAVA0053 | 0.00 | JAVA0053 Unused label | |
| JAVA0054 | 0.00 | JAVA0054 Inheritance depth N exceeds maximum M | |
| JAVA0055 | 0.00 | JAVA0055 Class should be interface | |
| JAVA0056 | 0.00 | JAVA0056 Unnecessary abstract modifier for interface or annotation | |
| JAVA0057 | 0.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 0.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 3.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 0.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 0.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 7.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 3.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 0.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 0.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 0.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 0.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 7.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 1.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 2.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 0.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 2.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 2.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 0.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 1.00 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0137 | 0.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 2.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 0.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 23.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 6.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 0.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 1.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 1.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 1.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 0.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 8.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 3.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 0.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 0.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 0.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 0.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 0.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 1100.00 | Number of lines in the source file | |
| LINE_COMMENT | 70.00 | Number of line comments | |
| LOC | 712.00 | Lines of code | |
| LOGICAL_LINES | 347.00 | Number of statements | |
| LOOPS | 6.00 | Number of loops | |
| NEST_DEPTH | 5.00 | Maximum nesting depth | |
| OPERANDS | 1549.00 | Number of operands | |
| OPERATORS | 2981.00 | Number of operators | |
| PARAMS | 75.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 4530.00 | Halstead program length | |
| PROGRAM_VOCAB | 581.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 107.00 | Number of return points from functions | |
| SIZE | 41444.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 517.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 64.00 | Number of unique operators | |
| WHITESPACE | 135.00 | Number of whitespace lines | |