com.videobug.agent.logging.util

Class EventDataStream

java.lang.Object

com.videobug.agent.logging.util.EventDataStream

public class EventDataStream
extends Object

This class is a stream specialized to write a sequence of events into files. A triple of data ID, thread ID, and a value observed in the event is recorded. While a regular stream like FileOutputStream generates a single file, this stream creates a number of files whose size is limited by the number of events (MAX_EVENTS_PER_FILE field).

Field Summary

Fields

Modifier and Type	Field and Description
static int	BYTES_PER_EVENT The data size of an event.
static int	MAX_EVENTS_PER_FILE The number of events stored in a single file.

Constructor Summary

Constructors

Constructor and Description
EventDataStream(FileNameGenerator target, IErrorLogger logger) Create an instance of stream.

Method Summary

Modifier and Type	Method and Description
void	close() Close the stream.
void	write(int dataId, long value) Write an event data into a file.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_EVENTS_PER_FILE

public static final int MAX_EVENTS_PER_FILE

The number of events stored in a single file.

See Also:

Constant Field Values

BYTES_PER_EVENT

public static final int BYTES_PER_EVENT

The data size of an event.

See Also:

Constant Field Values

Constructor Detail

EventDataStream

public EventDataStream(FileNameGenerator target,
                       IErrorLogger logger)

Create an instance of stream.

Parameters:

target - is an object generating file names.

logger - is to report errors that occur in this class.

Method Detail

write

public void write(int dataId,
                  long value)

Write an event data into a file. The thread ID is also recorded.

Parameters:

dataId - specifies an event and its bytecode location.

value - specifies a data value observed in the event.

close

public void close()

Close the stream.