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Class JavaGroups.Util

java.lang.Object
   |
   +----JavaGroups.Util

public class Util

extends Object

Util()

Crash()

DefragmentBuffer(Vector)

Concatenates smaller fragments into entire buffers.

DumpStack(boolean)

FragmentBuffer(byte[], int)

Fragments a byte buffer into smaller fragments of (max.) frag_size.

main(String[])

ObjectFromByteBuffer(byte[])

Creates an object from a byte buffer

ObjectToByteBuffer(Serializable)

Serializes an object into a byte buffer.

PeekViews(Channel, int, long)

Peeks for view on the channel until n views have been received or timeout has elapsed.

Print(String)

PrintEvent(Event)

PrintFragments(Vector)

PrintMessage(Message)

Tries to read an object from the message's buffer and prints it

PrintThreads()

Sleep(long)

 public Util()

 public static Object ObjectFromByteBuffer(byte buffer[]) throws Exception

Creates an object from a byte buffer

 public static byte[] ObjectToByteBuffer(Serializable obj) throws Exception

Serializes an object into a byte buffer. The object has to implement interface Serializable.

 public static void Sleep(long timeout)

 public static void DumpStack(boolean exit)

 public static void Crash()

 public static void PrintEvent(Event evt)

 public static void PrintMessage(Message msg)

Tries to read an object from the message's buffer and prints it

 public static void Print(String msg)

 public static void PrintThreads()

 public static Vector FragmentBuffer(byte buf[],
                                     int frag_size)

Fragments a byte buffer into smaller fragments of (max.) frag_size. Example: a byte buffer of 1024 bytes and a frag_size of 248 gives 4 fragments of 248 bytes each and 1 fragment of 32 bytes.

Returns:

A vector of byte buffers (byte[]).

 public static byte[] DefragmentBuffer(Vector fragments)

Concatenates smaller fragments into entire buffers.

Parameters:

fragments - A vector of byte buffers (byte[])

Returns:

A byte buffer

 public static void PrintFragments(Vector frags)

 public static View PeekViews(Channel channel,
                              int number_of_views,
                              long timeout)

Peeks for view on the channel until n views have been received or timeout has elapsed. Used to determine the view in which we want to start work. Usually, we start as only member in our own view (1st view) and the next view (2nd view) will be the full view of all members, or a timeout if we're the first member. If a non-view (a message or block) is received, the method returns immediately.

Parameters:

channel - The channel used to peek for views. Has to be operational.

number_of_views - The number of views to wait for. 2 is a good number to ensure that, if there are other members, we start working with them included in our view.

timeout - Number of milliseconds to wait until view is forced to return. A value of <= 0 means wait forever.

 public static void main(String args[])

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