org.objectweb.howl.log.BlockLogBuffer java code examples

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private void myMethod () {
 Charset c =String charsetName;Charset.forName(charsetName)
Charset.defaultCharset()
ContentType contentType;contentType.getCharset()
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}

/**
 * determines if buffer should be forced to disk.
 * 
 * <p>If there are any waiting threads, then buffer
 * is forced when it is 50 ms old.  Otherwise, if there
 * are no waiting threads, we wait 1/4 second before we
 * force.
 *
 * @return true if buffer should be forced now.
 */ 
boolean shouldForce()
{
 int forceDelta = getWaitingThreads() > 0 ? 50 : 250;
 long now = System.currentTimeMillis();
 return ((todPut + forceDelta) < now);
}

if (!compareBytes(headerId, HEADER_ID))
 throw new InvalidLogBufferException("HEADER_ID" + bufferInfo());
 throw new InvalidLogBufferException("bufferSize" + bufferInfo());
 throw new InvalidLogBufferException("data used: " + bytesUsed + bufferInfo());
 int expectedChecksum = checksum();
 buffer.clear().position(checksumOffset);
  throw new InvalidLogBufferException("CHECKSUM expected: " + Integer.toHexString(expectedChecksum) + bufferInfo());
if (!compareBytes(crlf, CRLF))
 throw new InvalidLogBufferException("HEADER_CRLF" + bufferInfo());
if (!compareBytes(footerId, FOOTER_ID))
 throw new InvalidLogBufferException("FOOTER_ID" + bufferInfo());
 throw new InvalidLogBufferException("FOOTER_BSN" + bufferInfo());
 throw new InvalidLogBufferException("FOOTER_TOD" + bufferInfo());
if (!compareBytes(crlf, CRLF))
 throw new InvalidLogBufferException("FOOTER_CRLF" + bufferInfo());

buffer.putInt(checksumOffset, 0);
if (doChecksum) {
 int checksum = checksum();
 buffer.putInt(checksumOffset, checksum);

if (!compareBytes(headerId, HEADER_ID))
 throw new InvalidLogBufferException("HEADER_ID" + bufferInfo());
 throw new InvalidLogBufferException("bufferSize" + bufferInfo());
 throw new InvalidLogBufferException("data used: " + bytesUsed + bufferInfo());
 int expectedChecksum = checksum();
 buffer.clear().position(checksumOffset);
  throw new InvalidLogBufferException("CHECKSUM expected: " + Integer.toHexString(expectedChecksum) + bufferInfo());
if (!compareBytes(crlf, CRLF))
 throw new InvalidLogBufferException("HEADER_CRLF" + bufferInfo());
if (!compareBytes(footerId, FOOTER_ID))
 throw new InvalidLogBufferException("FOOTER_ID" + bufferInfo());
 throw new InvalidLogBufferException("FOOTER_BSN" + bufferInfo());
 throw new InvalidLogBufferException("FOOTER_TOD" + bufferInfo());
if (!compareBytes(crlf, CRLF))
 throw new InvalidLogBufferException("FOOTER_CRLF" + bufferInfo());

buffer.putInt(checksumOffset, 0);
if (doChecksum) {
 int checksum = checksum();
 buffer.putInt(checksumOffset, checksum);

if (!compareBytes(headerId, HEADER_ID))
 throw new InvalidLogBufferException("HEADER_ID" + bufferInfo());
 throw new InvalidLogBufferException("bufferSize" + bufferInfo());
 throw new InvalidLogBufferException("data used: " + bytesUsed + bufferInfo());
 int expectedChecksum = checksum();
 buffer.clear().position(checksumOffset);
  throw new InvalidLogBufferException("CHECKSUM expected: " + Integer.toHexString(expectedChecksum) + bufferInfo());
if (!compareBytes(crlf, CRLF))
 throw new InvalidLogBufferException("HEADER_CRLF" + bufferInfo());
if (!compareBytes(footerId, FOOTER_ID))
 throw new InvalidLogBufferException("FOOTER_ID" + bufferInfo());
 throw new InvalidLogBufferException("FOOTER_BSN" + bufferInfo());
 throw new InvalidLogBufferException("FOOTER_TOD" + bufferInfo());
if (!compareBytes(crlf, CRLF))
 throw new InvalidLogBufferException("FOOTER_CRLF" + bufferInfo());

/**
 * determines if buffer should be forced to disk.
 * 
 * <p>If there are any waiting threads, then buffer
 * is forced when it is 50 ms old.  Otherwise, if there
 * are no waiting threads, we wait 1/4 second before we
 * force.
 *
 * @return true if buffer should be forced now.
 */ 
boolean shouldForce()
{
 int forceDelta = getWaitingThreads() > 0 ? 50 : 250;
 long now = System.currentTimeMillis();
 return ((todPut + forceDelta) < now);
}

buffer.putInt(checksumOffset, 0);
if (doChecksum) {
 int checksum = checksum();
 buffer.putInt(checksumOffset, checksum);

/**
 * determines if buffer should be forced to disk.
 * 
 * <p>If there are any waiting threads, then buffer
 * is forced when it is 50 ms old.  Otherwise, if there
 * are no waiting threads, we wait 1/4 second before we
 * force.
 *
 * @return true if buffer should be forced now.
 */ 
boolean shouldForce()
{
 int forceDelta = getWaitingThreads() > 0 ? 50 : 250;
 long now = System.currentTimeMillis();
 return ((todPut + forceDelta) < now);
}

Javadoc

An implementation of LogBuffer that provides features necessary for a reliable Transaction Monitor journal.

Each block contains a header, zero or more log records, and a footer. The header and footer contain enough information to allow recovery operations to validate the integrity of each log block.

Most used methods

bufferInfo
generate a String that represents the state of this LogBuffer object
checksum
compareBytes
internal routine used to compare two byte[] objects.
getWaitingThreads

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How to useBlockLogBuffer in org.objectweb.howl.log

Best Java code snippets using org.objectweb.howl.log.BlockLogBuffer (Showing top 9 results out of 315)

How to use
BlockLogBuffer
in
org.objectweb.howl.log