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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.store.raw.log   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.derby.impl.store.raw.log.LogCounter LogCounter public class LogCounter implements LogInstant(Code) A very simple log instant implementation. Within the stored log record a log counter is represented as a long, hence the getValueAsLong() method. Outside the LogFactory the instant is passed around as a LogCounter (through its LogInstant interface). The way the long is encoded is such that < == > correctly tells if one log instant is lessThan, equals or greater than another. Field Summary final public static  long DERBY_10_0_MAX_LOGFILE_NUMBER      final public static  long INVALID_LOG_INSTANT      A well defined value of an invalid log instant. final public static  long MAX_LOGFILE_NUMBER      final public static  long MAX_LOGFILE_SIZE      Constructor Summary public   LogCounter(long value)      public   LogCounter(long fileNumber, long position)      public   LogCounter()      Public niladic constructor needed for Formatable interface. Method Summary public  boolean equals(Object other)      final public static  long getLogFileNumber(long valueAsLong)      public  long getLogFileNumber()      final public static  long getLogFilePosition(long valueAsLong)      public  long getLogFilePosition()      public  int getTypeFormatId()      Get the formatID which corresponds to this class. public  long getValueAsLong()      These following methods are only intended to be called by an implementation of a log factory. public  int hashCode()      public  boolean lessThan(DatabaseInstant other)      final public static  long makeLogInstantAsLong(long filenum, long filepos)      public  DatabaseInstant next()      public  DatabaseInstant prior()      public  void readExternal(ObjectInput oi)      Read this in. public static  String toDebugString(long instant)      public  String toString()      public  void writeExternal(ObjectOutput oo)      Write this out. Field Detail DERBY_10_0_MAX_LOGFILE_NUMBER final public static long DERBY_10_0_MAX_LOGFILE_NUMBER(Code) INVALID_LOG_INSTANT final public static long INVALID_LOG_INSTANT(Code) A well defined value of an invalid log instant. MAX_LOGFILE_NUMBER final public static long MAX_LOGFILE_NUMBER(Code) MAX_LOGFILE_SIZE final public static long MAX_LOGFILE_SIZE(Code) Constructor Detail LogCounter public LogCounter(long value)(Code) LogCounter public LogCounter(long fileNumber, long position)(Code) LogCounter public LogCounter()(Code) Public niladic constructor needed for Formatable interface. Method Detail equals public boolean equals(Object other)(Code) getLogFileNumber final public static long getLogFileNumber(long valueAsLong)(Code) getLogFileNumber public long getLogFileNumber()(Code) getLogFilePosition final public static long getLogFilePosition(long valueAsLong)(Code) getLogFilePosition public long getLogFilePosition()(Code) getTypeFormatId public int getTypeFormatId()(Code) Get the formatID which corresponds to this class. the formatID of this class getValueAsLong public long getValueAsLong()(Code) These following methods are only intended to be called by an implementation of a log factory. All other uses of this object should only see it as a log instant. hashCode public int hashCode()(Code) lessThan public boolean lessThan(DatabaseInstant other)(Code) LogScan methods makeLogInstantAsLong final public static long makeLogInstantAsLong(long filenum, long filepos)(Code) Static functions that can only be used inside the RawStore's log factory which passes the log counter around encoded as a long next public DatabaseInstant next()(Code) prior public DatabaseInstant prior()(Code) readExternal public void readExternal(ObjectInput oi) throws IOException, ClassNotFoundException(Code) Read this in. exception:   IOException - error reading from log stream exception:   ClassNotFoundException - corrupted log stream toDebugString public static String toDebugString(long instant)(Code) toString public String toString()(Code) writeExternal public void writeExternal(ObjectOutput oo) throws IOException(Code) Write this out. exception:   IOException - error writing to log stream Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)