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ConcurrentMergeScheduler.h
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1 // Copyright (c) 2009-2014 Alan Wright. All rights reserved.
3 // Distributable under the terms of either the Apache License (Version 2.0)
4 // or the GNU Lesser General Public License.
6 
7 #ifndef CONCURRENTMERGESCHEDULER_H
8 #define CONCURRENTMERGESCHEDULER_H
9 
10 #include "MergeScheduler.h"
11 
12 namespace Lucene {
13 
20 public:
23 
25 
26 protected:
28 
29  SetMergeThread mergeThreads;
30 
32  int32_t maxThreadCount;
33 
35 
36  bool closed;
38 
40 
42  static bool anyExceptions;
43 
44 public:
45  virtual void initialize();
46 
50  virtual void setMaxThreadCount(int32_t count);
51 
53  virtual int32_t getMaxThreadCount();
54 
57  virtual int32_t getMergeThreadPriority();
58 
60  virtual void setMergeThreadPriority(int32_t pri);
61 
62  virtual void close();
63 
64  virtual void sync();
65 
66  virtual void merge(const IndexWriterPtr& writer);
67 
69  static bool anyUnhandledExceptions();
70  static void clearUnhandledExceptions();
71 
75 
77  static void setTestMode();
78 
79 protected:
80  virtual bool verbose();
81  virtual void message(const String& message);
82  virtual void initMergeThreadPriority();
83  virtual int32_t mergeThreadCount();
84 
86  virtual void doMerge(const OneMergePtr& merge);
87 
88  virtual MergeThreadPtr getMergeThread(const IndexWriterPtr& writer, const OneMergePtr& merge);
89 
91  virtual void handleMergeException(const LuceneException& exc);
92 
93  virtual void addMyself();
94 
95  friend class MergeThread;
96 };
97 
98 }
99 
100 #endif
#define LUCENE_CLASS(Name)
Definition: LuceneObject.h:24
A MergeScheduler that runs each merge using a separate thread, up until a maximum number of threads (...
Definition: ConcurrentMergeScheduler.h:19
virtual int32_t getMergeThreadPriority()
Return the priority that merge threads run at. By default the priority is 1 plus the priority of (ie,...
virtual int32_t mergeThreadCount()
virtual void message(const String &message)
virtual void merge(const IndexWriterPtr &writer)
Run the merges provided by IndexWriter#getNextMerge().
bool closed
Definition: ConcurrentMergeScheduler.h:36
virtual void doMerge(const OneMergePtr &merge)
Does the actual merge, by calling IndexWriter#merge.
virtual void initialize()
Called directly after instantiation to create objects that depend on this object being fully construc...
static bool anyUnhandledExceptions()
Used for testing.
virtual int32_t getMaxThreadCount()
Get the max # simultaneous threads that may be running.
virtual void initMergeThreadPriority()
void setSuppressExceptions()
Used for testing.
bool suppressExceptions
Definition: ConcurrentMergeScheduler.h:41
static Collection< ConcurrentMergeSchedulerPtr > allInstances
Definition: ConcurrentMergeScheduler.h:39
DirectoryPtr dir
Definition: ConcurrentMergeScheduler.h:34
int32_t mergeThreadPriority
Definition: ConcurrentMergeScheduler.h:24
virtual void handleMergeException(const LuceneException &exc)
Called when an exception is hit in a background merge thread.
virtual void close()
Close this MergeScheduler.
IndexWriterWeakPtr _writer
Definition: ConcurrentMergeScheduler.h:37
static bool anyExceptions
Definition: ConcurrentMergeScheduler.h:42
virtual void setMaxThreadCount(int32_t count)
Sets the max # simultaneous threads that may be running. If a merge is necessary yet we already have ...
static void setTestMode()
Used for testing.
int32_t maxThreadCount
Max number of threads allowed to be merging at once.
Definition: ConcurrentMergeScheduler.h:32
virtual void setMergeThreadPriority(int32_t pri)
Set the priority that merge threads run at.
virtual MergeThreadPtr getMergeThread(const IndexWriterPtr &writer, const OneMergePtr &merge)
SetMergeThread mergeThreads
Definition: ConcurrentMergeScheduler.h:29
Lucene exception container.
Definition: LuceneException.h:15
IndexWriter uses an instance implementing this interface to execute the merges selected by a MergePol...
Definition: MergeScheduler.h:16
Definition: AbstractAllTermDocs.h:12
boost::weak_ptr< IndexWriter > IndexWriterWeakPtr
Definition: LuceneTypes.h:160
boost::shared_ptr< OneMerge > OneMergePtr
Definition: LuceneTypes.h:192
boost::shared_ptr< Directory > DirectoryPtr
Definition: LuceneTypes.h:489
boost::shared_ptr< MergeThread > MergeThreadPtr
Definition: LuceneTypes.h:177
boost::shared_ptr< IndexWriter > IndexWriterPtr
Definition: LuceneTypes.h:160

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