/**
* Print a text to the log (usually derby.log), provided that verbose is true.
*
* @param text The text that will be logged
* @param writeHeader if true, encapsulates message in "begin error message" and "end error
* message" lines. If false, timestamps the text and writes it to the log without the header
* and footer.
*/
public void logText(String text, boolean writeHeader) {
if (verbose) {
if (writeHeader) {
Monitor.logTextMessage(MessageId.REPLICATION_ERROR_BEGIN, new Date());
Monitor.logMessage(text);
Monitor.logTextMessage(MessageId.REPLICATION_ERROR_END);
} else {
Monitor.logTextMessage(MessageId.REPLICATION_ONELINE_MSG_HEADER, new Date(), text);
}
}
}
/**
* Print error message and the stack trace of the throwable to the log (usually derby.log)
* provided that verbose is true. If verbose is false, nothing is logged.
*
* @param msgId The error message id
* @param t Error trace starts from this error
*/
public void logError(String msgId, Throwable t) {
if (verbose) {
Monitor.logTextMessage(MessageId.REPLICATION_ERROR_BEGIN, new Date());
if (msgId != null) {
Monitor.logTextMessage(msgId, dbname);
}
if (t != null) {
ErrorStringBuilder esb = new ErrorStringBuilder(Monitor.getStream().getHeader());
esb.stackTrace(t);
Monitor.logMessage(esb.get().toString());
esb.reset();
}
Monitor.logTextMessage(MessageId.REPLICATION_ERROR_END);
}
}
/**
* Convert this page to requested type, as defined by input format id.
*
* <p>The current cache entry is a different format id than the requested type, change it. This
* object is instantiated to the wrong subtype of cachedPage, this routine will create an object
* with the correct subtype, and transfer all pertinent information from this to the new correct
* object.
*
* <p>
*
* @return The new object created with the input fid and transfered info.
* @param fid The format id of the new page.
* @param newIdentity The key of the new page.
* @exception StandardException Standard exception policy.
*/
private CachedPage changeInstanceTo(int fid, PageKey newIdentity) throws StandardException {
CachedPage realPage;
try {
realPage = (CachedPage) Monitor.newInstanceFromIdentifier(fid);
} catch (StandardException se) {
if (se.getSeverity() > ExceptionSeverity.STATEMENT_SEVERITY) {
throw se;
} else {
throw StandardException.newException(
SQLState.DATA_UNKNOWN_PAGE_FORMAT_2,
newIdentity,
org.apache.derby.iapi.util.StringUtil.hexDump(pageData));
}
}
realPage.setFactory(dataFactory);
// avoid creating the data buffer if possible, transfer it to the new
// page if this is the first time the page buffer is used, then
// createPage will create the page array with the correct page size
if (this.pageData != null) {
realPage.alreadyReadPage = true;
realPage.usePageBuffer(this.pageData);
}
// RESOLVE (12/15/06) - the following code is commented out, but
// not sure why.
// this page should not be used any more, null out all its content and
// wait for GC to clean it up
// destroyPage();// let this subtype have a chance to get rid of stuff
// this.pageData = null; // this instance no longer own the data array
// this.pageCache = null;
// this.dataFactory = null;
// this.containerCache = null;
return realPage;
}
