ArvinDevel commented on a change in pull request #832: Issue 620: Close the
fileChannels for read when they are idle
URL: https://github.com/apache/bookkeeper/pull/832#discussion_r158970913
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File path:
bookkeeper-server/src/test/java/org/apache/bookkeeper/bookie/EntryLogTest.java
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@@ -315,6 +316,104 @@ public void testRecoverFromLedgersMapOnV0EntryLog()
throws Exception {
assertEquals(120, meta.getRemainingSize());
}
+ /**
+ * Test Cache for logid2Channel and concurrentMap for logid2FileChannel
work correctly.
+ * Note that, when an entryLogger is initialized, the entry log id will
increase one.
+ * when the preallocation is enabled, a new entrylogger will cost 2 logId.
+ */
+ @Test
+ public void testCacheInEntryLog() throws Exception {
+ File tmpDir = createTempDir("bkTest", ".dir");
+ File curDir = Bookie.getCurrentDirectory(tmpDir);
+ Bookie.checkDirectoryStructure(curDir);
+
+ int gcWaitTime = 1000;
+ ServerConfiguration conf =
TestBKConfiguration.newServerConfiguration();
+ conf.setGcWaitTime(gcWaitTime);
+ conf.setLedgerDirNames(new String[] {tmpDir.toString()});
+ //since last access, expire after 1s
+ conf.setExpireReadChannelCache(1000);
+ conf.setEntryLogFilePreAllocationEnabled(false);
+ // below one will cost logId 0
+ Bookie bookie = new Bookie(conf);
+ // create some entries
+ int numLogs = 4;
+ int numEntries = 10;
+ long[][] positions = new long[numLogs][];
+ for (int i = 0; i < numLogs; i++) {
+ positions[i] = new long[numEntries];
+ EntryLogger logger = new EntryLogger(conf,
+ bookie.getLedgerDirsManager());
+ for (int j = 0; j < numEntries; j++) {
+ positions[i][j] = logger.addEntry(i, generateEntry(i,
j).nioBuffer());
+ }
+ logger.flush();
+ LOG.info("log id is {}, LeastUnflushedLogId is {} ",
logger.getCurrentLogId(),
+ logger.getLeastUnflushedLogId());
+ }
+
+ for (int i = 1; i < numLogs + 1; i++) {
+ File logFile = new File(curDir, Long.toHexString(i) + ".log");
+ assertTrue(logFile.exists());
+ }
+
+ // create some read for the entry log
+ EntryLogger logger = ((InterleavedLedgerStorage)
bookie.ledgerStorage).entryLogger;
+ ThreadLocal<Cache<Long, BufferedReadChannel>> cacheThreadLocal =
logger.getLogid2Channel();
+ ConcurrentMap<Long, EntryLogger.ReferenceCountedFileChannel>
logid2FileChannel = logger.getLogid2FileChannel();
+ for (int j = 0; j < numEntries; j++) {
+ logger.readEntry(0, j, positions[0][j]);
+ }
+ LOG.info("cache size is {}, content is {}",
cacheThreadLocal.get().size(),
+ cacheThreadLocal.get().asMap().toString());
+ // the cache has readChannel for 1.log
+ assertNotNull(cacheThreadLocal.get().getIfPresent(1L));
+ for (int j = 0; j < numEntries; j++) {
+ logger.readEntry(1, j, positions[1][j]);
+ }
+ LOG.info("cache size is {}, content is {}",
cacheThreadLocal.get().size(),
+ cacheThreadLocal.get().asMap().toString());
+ // the cache has readChannel for 2.log
+ assertNotNull(cacheThreadLocal.get().getIfPresent(2L));
+ // expire time
+ Thread.sleep(1000);
Review comment:
ExpireTime semantic is about a period, I think timeout is just like sleep.
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