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java.lang.Objectjava.io.OutputStream
org.hyperic.hq.agent.server.LoggingOutputStream
public class LoggingOutputStream
An OutputStream that flushes out to a Category.
Note that no data is written out to the Category until the stream is flushed or closed.
Example:
// make sure everything sent to System.err is logged System.setErr(new PrintStream(new LoggingOutputStream(Category.getRoot(), Priority.WARN), true)); // make sure everything sent to System.out is also logged System.setOut(new PrintStream(new LoggingOutputStream(Category.getRoot(), Priority.INFO), true));
Category
Field Summary | |
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protected byte[] |
buf
The internal buffer where data is stored. |
protected org.apache.log4j.Category |
category
The category to write to. |
protected int |
count
The number of valid bytes in the buffer. |
static int |
DEFAULT_BUFFER_LENGTH
The default number of bytes in the buffer. |
protected boolean |
hasBeenClosed
Used to maintain the contract of close() . |
protected static java.lang.String |
LINE_SEPERATOR
|
protected org.apache.log4j.Priority |
priority
The priority to use when writing to the Category. |
Constructor Summary | |
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LoggingOutputStream(org.apache.log4j.Category cat,
org.apache.log4j.Priority priority)
Creates the LoggingOutputStream to flush to the given Category. |
Method Summary | |
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void |
close()
Closes this output stream and releases any system resources associated with this stream. |
void |
flush()
Flushes this output stream and forces any buffered output bytes to be written out. |
void |
write(int b)
Writes the specified byte to this output stream. |
Methods inherited from class java.io.OutputStream |
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write, write |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected static final java.lang.String LINE_SEPERATOR
protected boolean hasBeenClosed
close()
.
protected byte[] buf
protected int count
public static final int DEFAULT_BUFFER_LENGTH
protected org.apache.log4j.Category category
protected org.apache.log4j.Priority priority
Constructor Detail |
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public LoggingOutputStream(org.apache.log4j.Category cat, org.apache.log4j.Priority priority) throws java.lang.IllegalArgumentException
cat
- the Category to write topriority
- the Priority to use when writing to the Category
java.lang.IllegalArgumentException
- if cat == null or priority == nullMethod Detail |
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public void close()
close
is that it closes the output stream. A closed stream cannot perform
output operations and cannot be reopened.
close
in interface java.io.Closeable
close
in class java.io.OutputStream
public void write(int b) throws java.io.IOException
write
is that one byte is written
to the output stream. The byte to be written is the eight
low-order bits of the argument b
. The 24
high-order bits of b
are ignored.
write
in class java.io.OutputStream
b
- the byte
to write
java.io.IOException
- if an I/O error occurs. In particular,
an IOException
may be thrown if the
output stream has been closed.public void flush()
flush
is
that calling it is an indication that, if any bytes previously
written have been buffered by the implementation of the output
stream, such bytes should immediately be written to their
intended destination.
flush
in interface java.io.Flushable
flush
in class java.io.OutputStream
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