biz.paluch.logging.gelf.intern.sender.GelfBuffers Maven / Gradle / Ivy
package biz.paluch.logging.gelf.intern.sender;
import java.nio.BufferOverflowException;
import java.nio.ByteBuffer;
import biz.paluch.logging.gelf.intern.GelfMessage;
/**
* Utility to create TCP/UDP buffers from a {@link GelfMessage} by working with {@link ByteBuffer}. Buffers are provided by
* {@link ThreadLocal} and enlarged if the buffer size is exceeded. Enlarged buffers are returned to their originating
* {@link ThreadLocal}.
*
* @author Mark Paluch
*/
class GelfBuffers {
private GelfBuffers() {
// no instance allowed
}
/**
* Create UDP buffers and apply auto-buffer-enlarging, if necessary.
*
* @param message
* @param writeBuffers
* @param tempBuffers
* @return
*/
protected static ByteBuffer[] toUDPBuffers(GelfMessage message, ThreadLocal writeBuffers,
ThreadLocal tempBuffers) {
while (true) {
try {
return message.toUDPBuffers(getBuffer(writeBuffers), getBuffer(tempBuffers));
} catch (BufferOverflowException e) {
enlargeBuffer(writeBuffers);
enlargeBuffer(tempBuffers);
}
}
}
/**
* Create TCP buffer and apply auto-buffer-enlarging, if necessary.
*
* @param message
* @param writeBuffers
* @return
*/
protected static ByteBuffer toTCPBuffer(GelfMessage message, ThreadLocal writeBuffers) {
while (true) {
try {
return message.toTCPBuffer(getBuffer(writeBuffers));
} catch (BufferOverflowException e) {
enlargeBuffer(writeBuffers);
}
}
}
private static void enlargeBuffer(ThreadLocal buffers) {
ByteBuffer newBuffer = ByteBuffer.allocateDirect(calculateNewBufferSize(buffers.get().capacity()));
buffers.set(newBuffer);
}
private static ByteBuffer getBuffer(ThreadLocal buffers) {
return (ByteBuffer) buffers.get().clear();
}
private static int calculateNewBufferSize(int capacity) {
return (int) (capacity * 1.5);
}
}