org.apache.mesos
Class Log.Reader

java.lang.Object
  org.apache.mesos.Log.Reader

Enclosing class:

Log

public static class Log.Reader
extends Object

Provides read access to the Log. This class is safe for use from multiple threads and for the life of the log regardless of any exceptions thrown from its methods.

Constructor Summary

Log.Reader(Log log)

Method Summary

Log.Position	beginning() Returns the beginning position of the log (might be out of date with respect to another replica).
Log.Position	ending() Returns the ending position of the log (might be out of date with respect to another replica).
protected void	finalize()
protected void	initialize(Log log)
List<Log.Entry>	read(Log.Position from, Log.Position to, long timeout, TimeUnit unit) Attempts to read from the log between the specified positions (inclusive).

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Log.Reader

public Log.Reader(Log log)

Method Detail

read

public List<Log.Entry> read(Log.Position from,
                            Log.Position to,
                            long timeout,
                            TimeUnit unit)
                     throws TimeoutException,
                            Log.OperationFailedException

Attempts to read from the log between the specified positions (inclusive). If either of the positions are invalid, an OperationFailedException will get thrown. Unfortunately, this will also get thrown in other circumstances (e.g., disk failure) and therefore it is currently impossible to tell these two cases apart.

Throws:

TimeoutException

Log.OperationFailedException

beginning

public Log.Position beginning()

Returns the beginning position of the log (might be out of date with respect to another replica).

ending

public Log.Position ending()

Returns the ending position of the log (might be out of date with respect to another replica).

initialize

protected void initialize(Log log)

finalize

protected void finalize()

Overrides:

finalize in class Object