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annotate src/org/dancres/blitz/entry/LeaseTrackerFactory.java @ 35:6f68e94c1fb8 default tip

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Add CondensedStats monitoring utility, equivalent to vmstat
author Dominic Cleal <dominic-cleal@cdo2.com>
date Thu, 05 Aug 2010 11:07:25 +0100
parents 3dc0c5604566
children
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3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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1 package org.dancres.blitz.entry;
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2
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3 import java.io.IOException;
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4
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5 import org.dancres.blitz.lease.LeaseReaper;
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6 import org.dancres.blitz.lease.ReapFilter;
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8 import org.dancres.blitz.oid.Allocator;
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10 class LeaseTrackerFactory {
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11 /**
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12 Create a LeaseTracker capable of managing all leases for a particular
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13 entry type which is using a particular Allocator instance to assign ids.
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14 */
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15 static LeaseTracker getTracker(String aType, Allocator anAllocator)
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16 throws IOException {
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17
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18 if (EntryRepositoryFactory.getReaper().isActive())
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19 return new LeaseTrackerImpl(aType,
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20 anAllocator.getMaxZoneId());
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21 else
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22 return new NullTrackerImpl(aType);
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23 }
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24
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25 private static class NullTrackerImpl implements LeaseTracker {
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26 private String theType;
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27
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28 NullTrackerImpl(String aType) {
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29 // System.err.println("NullTracker: " + aType);
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30 theType = aType;
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31 }
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32
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33 public void bringOutTheDead(EntryReaper aReaper) {
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34 // Do nothing
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35 }
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36
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37 public void delete(PersistentEntry anEntry) throws IOException {
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38 // Do nothing
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39 }
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40
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41 public void update(PersistentEntry anEntry) throws IOException {
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42 // Do nothing
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43 }
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44
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45 public void write(PersistentEntry anEntry) throws IOException {
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46 // Do nothing
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47 }
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48
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49 public void close() throws IOException {
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50 // Do nothing
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51 }
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52
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53 public void delete() throws IOException {
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54 // Do nothing
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55 }
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56 }
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57 }