public class NRTManagerReopenThread extends java.lang.Thread implements NRTManager.WaitingListener, java.io.Closeable
NRTManager.
Typical usage looks like this:
... open your own writer ...
NRTManager manager = new NRTManager(writer);
// Refreshes searcher every 5 seconds when nobody is waiting, and up to 100 msec delay
// when somebody is waiting:
NRTManagerReopenThread reopenThread = new NRTManagerReopenThread(manager, 5.0, 0.1);
reopenThread.setName("NRT Reopen Thread");
reopenThread.setPriority(Math.min(Thread.currentThread().getPriority()+2, Thread.MAX_PRIORITY));
reopenThread.setDaemon(true);
reopenThread.start();
Then, for each incoming query, do this:
// For each incoming query:
IndexSearcher searcher = manager.get();
try {
// Use searcher to search...
} finally {
manager.release(searcher);
}
You should make changes using the NRTManager; if you later need to obtain
a searcher reflecting those changes:
// ... or updateDocument, deleteDocuments, etc:
long gen = manager.addDocument(...);
// Returned searcher is guaranteed to reflect the just added document
IndexSearcher searcher = manager.get(gen);
try {
// Use searcher to search...
} finally {
manager.release(searcher);
}
When you are done be sure to close both the manager and the reopen thrad:
reopenThread.close(); manager.close();
| Constructor and Description |
|---|
NRTManagerReopenThread(NRTManager manager,
double targetMaxStaleSec,
double targetMinStaleSec)
Create NRTManagerReopenThread, to periodically reopen the NRT searcher.
|
| Modifier and Type | Method and Description |
|---|---|
void |
close() |
void |
run() |
void |
waiting(long targetGen) |
activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yieldpublic NRTManagerReopenThread(NRTManager manager, double targetMaxStaleSec, double targetMinStaleSec)
targetMaxStaleSec - Maximum time until a new
reader must be opened; this sets the upper bound
on how slowly reopens may occurtargetMinStaleSec - Mininum time until a new
reader can be opened; this sets the lower bound
on how quickly reopens may occur, when a caller
is waiting for a specific indexing change to
become visible.public void close()
close in interface java.io.Closeableclose in interface java.lang.AutoCloseablepublic void waiting(long targetGen)
waiting in interface NRTManager.WaitingListenerpublic void run()
run in interface java.lang.Runnablerun in class java.lang.ThreadCopyright © 2000-2022 Apache Software Foundation. All Rights Reserved.