ConnectionManager.java
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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 | |
|---|---|---|
| DECL_COMMENTS | Comments in declarations |  |
| DOC_COMMENT | Number of javadoc comment lines | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
| COMMENTS | Comment lines | |
| JAVA0108 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0141 | JAVA0141 Unnecessary modifier for method in interface | |
| FUNCTIONS | Number of function declarations | |
| JAVA0034 | JAVA0034 Missing braces in if statement | |
| SIZE | Size of the file in bytes | |
| JAVA0109 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0117 | JAVA0117 Missing javadoc: method 'method' | |
| LINES | Number of lines in the source file | |
| PROGRAM_VOLUME | Halstead program volume | |
| JAVA0136 | JAVA0136 N methods defined in class (maximum: M) | |
| EXEC_COMMENTS | Comments in executable code | |
| JAVA0126 | JAVA0126 Method declares unchecked exception in throws | |
| LINE_COMMENT | Number of line comments | |
| COMPARISONS | Number of comparison operators | |
| CYCLOMATIC | Cyclomatic complexity | |
| LOC | Lines of code | |
| BLOCKS | Number of blocks | |
| RETURNS | Number of return points from functions | |
| ELOC | Effective lines of code | |
| LOOPS | Number of loops | |
| PROGRAM_LENGTH | Halstead program length | |
| OPERATORS | Number of operators | |
| OPERANDS | Number of operands | |
| EXITS | Procedure exits | |
| INTERFACE_COMPLEXITY | Interface complexity | |
| JAVA0145 | JAVA0145 Tab character used in source file | |
package com.limegroup.gnutella;
import java.net.Socket;
import java.util.List;
import java.util.Set;
import org.limewire.io.Connectable;
import org.limewire.io.IpPort;
import org.limewire.net.ConnectionAcceptor;
import org.limewire.net.SocketsManager.ConnectType;
import com.limegroup.gnutella.connection.ConnectionLifecycleEvent;
import com.limegroup.gnutella.connection.ConnectionLifecycleListener;
import com.limegroup.gnutella.connection.RoutedConnection;
import com.limegroup.gnutella.handshaking.HandshakeResponse;
import com.limegroup.gnutella.handshaking.HandshakeStatus;
import com.limegroup.gnutella.messages.Message.Network;
import com.limegroup.gnutella.messages.vendor.QueryStatusResponse;
import com.limegroup.gnutella.util.EventDispatcher;
/**
* The list of all RoutedConnection's. Provides a factory method for creating
* user-requested outgoing connections, accepts incoming connections, and
* fetches "automatic" outgoing connections as needed. Creates threads for
* handling these connections when appropriate.
*
* Because this is the only list of all connections, it plays an important role
* in message broadcasting. For this reason, the code is highly tuned to avoid
* locking in the getInitializedConnections() methods. Adding and removing
* connections is a slower operation.<p>
*
* LimeWire follows the following connection strategy:<br>
* As a leaf, LimeWire will ONLY connect to 'good' Ultrapeers. The definition
* of good is constantly changing. For a current view of 'good', review
* HandshakeResponse.isGoodUltrapeer(). LimeWire leaves will NOT deny
* a connection to an ultrapeer even if they've reached their maximum
* desired number of connections (currently 4). This means that if 5
* connections resolve simultaneously, the leaf will remain connected to all 5.
* <br>
* As an Ultrapeer, LimeWire will seek outgoing connections for 5 less than
* the number of it's desired peer slots. This is done so that newcomers
* on the network have a better chance of finding an ultrapeer with a slot
* open. LimeWire ultrapeers will allow ANY other ultrapeer to connect to it,
* and to ensure that the network does not become too LimeWire-centric, it
* reserves 3 slots for non-LimeWire peers. LimeWire ultrapeers will allow
* ANY leaf to connect, so long as there are atleast 15 slots open. Beyond
* that number, LimeWire will only allow 'good' leaves. To see what consitutes
* a good leave, view HandshakeResponse.isGoodLeaf(). To ensure that the
* network does not remain too LimeWire-centric, it reserves 3 slots for
* non-LimeWire leaves.<p>
*
* ConnectionManager has methods to get up and downstream bandwidth, but it
* doesn't quite fit the BandwidthTracker interface.
*/
public interface ConnectionManager extends ConnectionAcceptor,
EventDispatcher<ConnectionLifecycleEvent, ConnectionLifecycleListener> {
/** The number of connections leaves should maintain to Ultrapeers. */
public static final int PREFERRED_CONNECTIONS_FOR_LEAF = 5;
/** How many connect back requests to send if we have a single connection */
public static final int CONNECT_BACK_REDUNDANT_REQUESTS = 3;
/**
* The number of leaf connections reserved for non LimeWire clients.
* This is done to ensure that the network is not solely LimeWire centric.
*/
public static final int RESERVED_NON_LIMEWIRE_LEAVES = 2;
/**
* Links the ConnectionManager up with the other back end pieces and
* launches the ConnectionWatchdog and the initial ConnectionFetchers.
*/
public void initialize();
/**
* Create a new connection, allowing it to initialize and loop for messages on a new thread.
*/
public void createConnectionAsynchronously(String hostname, int portnum, ConnectType type);
/**
* Create an incoming connection.
*
* If the connection can support asynchronous messaging, this method will return
* immediately. Otherwise, this will block forever while the connection handshakes
* and then loops for messages (it will return when the connection dies).
*/
void acceptConnection(Socket socket);
/**
* Removes the specified connection from currently active connections, also
* removing this connection from routing tables and modifying active
* connection fetchers accordingly.
*
* @param mc the <tt>RoutedConnection</tt> instance to remove
*/
public void remove(RoutedConnection mc);
/**
* True if this is currently or wants to be a supernode,
* otherwise false.
*/
public boolean isSupernode();
/** Return true if we are not a private address, have been ultrapeer capable
* in the past, and are not being shielded by anybody, we don't have UP
* mode disabled AND we are not exclusively a DHT node.
*/
public boolean isSupernodeCapable();
/**
* @return if we are currently using a http or socks4/5 proxy to connect.
*/
public boolean isBehindProxy();
/**
* Tells whether or not we're actively being a supernode to anyone.
*/
public boolean isActiveSupernode();
/**
* Returns true if this is a leaf node with a connection to a ultrapeer. It
* is not required that the ultrapeer support query routing, though that is
* generally the case.
*/
public boolean isShieldedLeaf();
/**
* Returns true if this is a super node with a connection to a leaf.
*/
public boolean hasSupernodeClientConnection();
/**
* Returns whether or not this node has any available connection
* slots. This is only relevant for Ultrapeers -- leaves will
* always return <tt>false</tt> to this call since they do not
* accept any incoming connections, at least for now.
*
* @return <tt>true</tt> if this node is an Ultrapeer with free
* leaf or Ultrapeer connections slots, otherwise <tt>false</tt>
*/
public boolean hasFreeSlots();
/**
* Returns whether this (probably) has a connection to the given host. This
* method is currently implemented by iterating through all connections and
* comparing addresses but not ports. (Incoming connections use ephemeral
* ports.) As a result, this test may conservatively return true even if
* this is not connected to <tt>host</tt>. Likewise, it may it mistakenly
* return false if <tt>host</tt> is a multihomed system. In the future,
* additional connection headers may make the test more precise.
*
* @return true if this is probably connected to <tt>host</tt>
*/
boolean isConnectedTo(String hostName);
/**
* Returns true if we're currently attempting to connect to a particular host.
* This checks both the Ip & Port.
*/
boolean isConnectingTo(IpPort host);
/**
* @return the number of connections, which is greater than or equal
* to the number of initialized connections.
*/
public int getNumConnections();
/**
* @return the number of initialized connections, which is less than or
* equals to the number of connections.
*/
public int getNumInitializedConnections();
/**
* @return the number of initializedclient connections, which is less than
* or equals to the number of connections.
*/
public int getNumInitializedClientConnections();
/**
*@return the number of initialized connections for which
* isClientSupernodeConnection is true.
*/
public int getNumClientSupernodeConnections();
/**
*@return the number of ultrapeer -> ultrapeer connections.
*/
public int getNumUltrapeerConnections();
/**
*@return the number of old unrouted connections.
*/
public int getNumOldConnections();
/**
* @return the number of free leaf slots.
*/
public int getNumFreeLeafSlots();
/**
* @return the number of free leaf slots that LimeWires can connect to.
*/
public int getNumFreeLimeWireLeafSlots();
/**
* @return the number of free non-leaf slots.
*/
public int getNumFreeNonLeafSlots();
/**
* @return the number of free non-leaf slots that LimeWires can connect to.
*/
public int getNumFreeLimeWireNonLeafSlots();
/**
* Returns true if we've made a locale-matching connection (or don't
* want any at all).
*/
public boolean isLocaleMatched();
/**
* @return the number of locale reserved slots to be filled
*
* An ultrapeer may not have Free LimeWire Non Leaf Slots but may still
* have free slots that are reserved for locales
*/
public int getNumLimeWireLocalePrefSlots();
/**
* Determines if we've reached our maximum number of preferred connections.
*/
public boolean isFullyConnected();
/**
* Returns whether or not the client has an established connection with
* another Gnutella client.
*
* @return <tt>true</tt> if the client is currently connected to
* another Gnutella client, <tt>false</tt> otherwise
*/
public boolean isConnected();
/**
* Returns whether or not we are currently attempting to connect to the
* network.
*/
public boolean isConnecting();
/**
* Takes a snapshot of the upstream and downstream bandwidth since the last
* call to measureBandwidth.
* @see BandwidthTracker#measureBandwidth
*/
public void measureBandwidth();
/**
* Returns the upstream bandwidth in kbytes/sec between the last two calls
* to measureBandwidth.
* @see BandwidthTracker#measureBandwidth
*/
public float getMeasuredUpstreamBandwidth();
/**
* Returns the downstream bandwidth in kbytes/sec between the last two calls
* to measureBandwidth.
* @see BandwidthTracker#measureBandwidth
*/
public float getMeasuredDownstreamBandwidth();
/**
* Checks if the connection received can be accepted,
* based upon the type of connection (e.g. client, ultrapeer,
* temporary etc).
* @param c The connection we received, for which to
* test if we have incoming slot.
* @return true, if we have incoming slot for the connection received,
* false otherwise
*/
public HandshakeStatus allowConnectionAsLeaf(HandshakeResponse hr);
/**
* Checks if the connection received can be accepted,
* based upon the type of connection (e.g. client, ultrapeer,
* temporary etc).
* @param c The connection we received, for which to
* test if we have incoming slot.
* @return true, if we have incoming slot for the connection received,
* false otherwise
*/
public HandshakeStatus allowConnection(HandshakeResponse hr);
/**
* Checks if there is any available slot of any kind.
* @return true, if we have incoming slot of some kind,
* false otherwise
*/
public boolean allowAnyConnection();
/**
* Returns true if this has slots for an incoming connection, <b>without
* accounting for this' ultrapeer capabilities</b>. More specifically:
* <ul>
* <li>if ultrapeerHeader==null, returns true if this has space for an
* unrouted old-style connection.
* <li>if ultrapeerHeader.equals("true"), returns true if this has slots
* for a leaf connection.
* <li>if ultrapeerHeader.equals("false"), returns true if this has slots
* for an ultrapeer connection.
* </ul>
*
* <tt>useragentHeader</tt> is used to prefer LimeWire and certain trusted
* vendors. <tt>outgoing</tt> is currently unused, but may be used to
* prefer incoming or outgoing connections in the forward.
*
* @param outgoing true if this is an outgoing connection; true if incoming
* @param ultrapeerHeader the value of the X-Ultrapeer header, or null
* if it was not written
* @param useragentHeader the value of the User-Agent header, or null if
* it was not written
* @return true if a connection of the given type is allowed
*/
public HandshakeStatus allowConnection(HandshakeResponse hr, boolean leaf);
/**
* Tells if this node thinks that more ultrapeers are needed on the
* network. This method should be invoked on a ultrapeer only, as
* only ultrapeer may have required information to make informed
* decision.
* @return true, if more ultrapeers needed, false otherwise
*/
public boolean supernodeNeeded();
/**
* Returns a list of this' initialized connections.
*/
public List<RoutedConnection> getInitializedConnections();
/**
* return a list of initialized connection that matches the parameter
* String loc.
* create a new linkedlist to return.
*/
public List<RoutedConnection> getInitializedConnectionsMatchLocale(String loc);
/**
* Returns a list of this' initialized connections.
*/
public List<RoutedConnection> getInitializedClientConnections();
/**
* return a list of initialized client connection that matches the parameter
* String loc.
* create a new linkedlist to return.
*/
public List<RoutedConnection> getInitializedClientConnectionsMatchLocale(String loc);
/**
* @return all of this' connections.
*/
public List<RoutedConnection> getConnections();
/**
* Accessor for the <tt>Set</tt> of push proxies for this node. If
* there are no push proxies available, or if this node is an Ultrapeer,
* this will return an empty <tt>Set</tt>.
*
* @return a <tt>Set</tt> of push proxies with a maximum size of 4
*
* TODO: should the set of pushproxy UPs be cached and updated as
* connections are killed and created?
*/
public Set<Connectable> getPushProxies();
/**
* Sends a TCPConnectBack request to (up to) 2 connected Ultrapeers.
* @returns false if no requests were sent, otherwise true.
*/
public boolean sendTCPConnectBackRequests();
/**
* Sends a UDPConnectBack request to (up to) 4 (and at least 2)
* connected Ultrapeers.
* @returns false if no requests were sent, otherwise true.
*/
public boolean sendUDPConnectBackRequests(GUID cbGuid);
/**
* Sends a QueryStatusResponse message to as many Ultrapeers as possible.
*
* @param
*/
public void updateQueryStatus(QueryStatusResponse stat);
/**
* Returns the <tt>Endpoint</tt> for an Ultrapeer connected via TCP,
* if available.
*
* @return the <tt>Endpoint</tt> for an Ultrapeer connected via TCP if
* there is one, otherwise returns <tt>null</tt>
*/
public Endpoint getConnectedGUESSUltrapeer();
/** Returns a <tt>List<tt> of Ultrapeers connected via TCP that are GUESS
* enabled.
*
* @return A non-null List of GUESS enabled, TCP connected Ultrapeers. The
* are represented as ManagedConnections.
*/
public List<RoutedConnection> getConnectedGUESSUltrapeers();
/**
* Adds an incoming connection to the list of connections. Note that
* the incoming connection has already been initialized before
* this method is invoked.
* Should only be called from a thread that has this' monitor.
* This is called from initializeExternallyGeneratedConnection, for
* incoming connections
*
* Default access for testing.
*/
void connectionInitializingIncoming(RoutedConnection c);
/**
* Marks a connection fully initialized, but only if that connection wasn't
* removed from the list of open connections during its initialization.
* Should only be called from a thread that has this' monitor.
*
* Default access for testing.
*/
boolean connectionInitialized(RoutedConnection c);
/**
* Iterates over all the connections and sends the updated CapabilitiesVM
* down every one of them.
*/
public void sendUpdatedCapabilities();
/**
* Disconnects from the network. Closes all connections and sets
* the number of connections to zero.
*
* @param willTryToReconnect Whether or not this is only a temporary disconnection
*/
public void disconnect(boolean willTryToReconnect);
/**
* Returns this node's average connection time - in ms - including the current session.
*
*/
public long getCurrentAverageUptime();
/**
* Connects to the network. Ensures the number of messaging connections
* is non-zero and recontacts the pong server as needed.
*/
public void connect();
/**
* Returns true if this can safely switch from Ultrapeer to leaf mode.
* Typically this means that we are an Ultrapeer and have no leaf
* connections.
*
* @return <tt>true</tt> if we will allow ourselves to become a leaf,
* otherwise <tt>false</tt>
*/
public boolean allowLeafDemotion();
/**
* Notifies the connection manager that it should attempt to become an
* Ultrapeer. If we already are an Ultrapeer, this will be ignored.
*
* @param demotionLimit the number of attempts by other Ultrapeers to
* demote us to a leaf that we should allow before giving up in the
* attempt to become an Ultrapeer
*/
public void tryToBecomeAnUltrapeer(int demotionLimit);
/**
* Gets the number of preferred connections to maintain.
*/
public int getPreferredConnectionCount();
/**
* Determines if we're attempting to maintain the idle connection count.
*/
public boolean isConnectionIdle();
/**
* This method notifies the connection manager that the user does not have
* a live connection to the Internet to the best of our determination.
* In this case, we notify the user with a message and maintain any
* Gnutella hosts we have already tried instead of discarding them.
*/
public void noInternetConnection();
/**
* Count how many connections have already received N messages
*/
public int countConnectionsWithNMessages(int messageThreshold);
/**
* Count up all the messages on active connections
*/
public int getActiveConnectionMessages();
/**
* @return true if a connect back request can be sent on the provided network
*/
public boolean canSendConnectBack(Network network);
/**
* notification that a connect back request has been sent on the given network
*/
public void connectBackSent(Network network);
}
The table below shows all metrics for ConnectionManager.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 0.00 | Number of blocks | |
| BLOCK_COMMENT | 0.00 | Number of block comment lines | |
| COMMENTS | 364.00 | Comment lines | |
| COMMENT_DENSITY | 4.39 | Comment density | |
| COMPARISONS | 0.00 | Number of comparison operators | |
| CYCLOMATIC | 62.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 66.00 | Comments in declarations | |
| DOC_COMMENT | 364.00 | Number of javadoc comment lines | |
| ELOC | 83.00 | Effective lines of code | |
| EXEC_COMMENTS | 0.00 | Comments in executable code | |
| EXITS | 0.00 | Procedure exits | |
| FUNCTIONS | 62.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 17.14 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 22.00 | 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 | 0.00 | 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 | 0.00 | 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 | 1.00 | 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 | 0.00 | 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 | 3.00 | 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 | 19.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 5.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 23.00 | 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 | 1.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 1.00 | 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 | 0.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | 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 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 0.00 | 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 | 0.00 | 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 | 57.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 0.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 0.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 37.00 | 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 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | 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 | 0.00 | 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 | 0.00 | 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 | 526.00 | Number of lines in the source file | |
| LINE_COMMENT | 0.00 | Number of line comments | |
| LOC | 84.00 | Lines of code | |
| LOGICAL_LINES | 81.00 | Number of statements | |
| LOOPS | 0.00 | Number of loops | |
| NEST_DEPTH | 0.00 | Maximum nesting depth | |
| OPERANDS | 201.00 | Number of operands | |
| OPERATORS | 430.00 | Number of operators | |
| PARAMS | 22.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 631.00 | Halstead program length | |
| PROGRAM_VOCAB | 151.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 0.00 | Number of return points from functions | |
| SIZE | 18684.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 129.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 22.00 | Number of unique operators | |
| WHITESPACE | 78.00 | Number of whitespace lines | |