com.graphhopper.util.Helper.cleanHack()方法的使用及代码示例

x33g5p2x  于2022-01-20 转载在 其他  
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本文整理了Java中com.graphhopper.util.Helper.cleanHack()方法的一些代码示例，展示了Helper.cleanHack()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Helper.cleanHack()方法的具体详情如下：
包路径：com.graphhopper.util.Helper
类名称：Helper
方法名：cleanHack

Helper.cleanHack介绍

[英]Trying to force the release of the mapped ByteBuffer. See http://stackoverflow.com/q/2972986/194609 and use only if you know what you are doing.
[中]试图强制释放映射的ByteBuffer。看见http://stackoverflow.com/q/2972986/194609只有当你知道自己在做什么时才使用。

代码示例

代码示例来源：origin: graphhopper/graphhopper

  1. /**
  2.  * @param forceClean if true the clean hack (system.gc) will be executed and forces the system
  3.  *                   to cleanup the mmap resources. Set false if you need to close many MMapDataAccess objects.
  4.  */
  5. void close(boolean forceClean) {
  6.   clean(0, segments.size());
  7.   segments.clear();
  8.   Helper.close(raFile);
  9.   if (forceClean)
  10.     Helper.cleanHack();
  11. }

代码示例来源：origin: graphhopper/graphhopper

  1. @Override
  2. public void trimTo(long capacity) {
  3.   if (capacity < segmentSizeInBytes) {
  4.     capacity = segmentSizeInBytes;
  5.   }
  6.   int remainingSegNo = (int) (capacity / segmentSizeInBytes);
  7.   if (capacity % segmentSizeInBytes != 0) {
  8.     remainingSegNo++;
  9.   }
  10.   clean(remainingSegNo, segments.size());
  11.   Helper.cleanHack();
  12.   segments = new ArrayList<>(segments.subList(0, remainingSegNo));
  13.   try {
  14.     // windows does not allow changing the length of an open files
  15.     if (!Constants.WINDOWS) {
  16.       // reduce file size
  17.       raFile.setLength(HEADER_OFFSET + remainingSegNo * segmentSizeInBytes);
  18.     }
  19.   } catch (Exception ex) {
  20.     throw new RuntimeException(ex);
  21.   }
  22. }

代码示例来源：origin: graphhopper/graphhopper

  1. ioex = tmpex;
  2. trial++;
  3. Helper.cleanHack();
  4. try {

代码示例来源：origin: graphhopper/graphhopper

  1. @Override
  2. public void clear() {
  3.   // If there is at least one MMap DA then do not apply the cleanHack 
  4.   // for every single mmap DA as this is very slow if lots of DataAccess objects were collected 
  5.   // => forceClean == false
  6.   MMapDataAccess mmapDA = null;
  7.   for (DataAccess da : map.values()) {
  8.     if (da instanceof MMapDataAccess)
  9.       mmapDA = (MMapDataAccess) da;
  10.     removeDA(da, da.getName(), false);
  11.   }
  12.   if (mmapDA != null)
  13.     cleanHack();
  14.   map.clear();
  15. }

代码示例来源：origin: com.graphhopper/graphhopper

  1. /**
  2.  * @param forceClean if true the clean hack (system.gc) will be executed and forces the system
  3.  * to cleanup the mmap resources. Set false if you need to close many MMapDataAccess objects.
  4.  */
  5. void close( boolean forceClean )
  6. {
  7.   clean(0, segments.size());
  8.   segments.clear();
  9.   Helper.close(raFile);
  10.   if (forceClean)
  11.     Helper.cleanHack();
  12. }

代码示例来源：origin: com.rgi-corp/graphhopper

  1. /**
  2.  * @param forceClean if true the clean hack (system.gc) will be executed and forces the system
  3.  *                   to cleanup the mmap resources. Set false if you need to close many MMapDataAccess objects.
  4.  */
  5. void close(boolean forceClean) {
  6.   clean(0, segments.size());
  7.   segments.clear();
  8.   Helper.close(raFile);
  9.   if (forceClean)
  10.     Helper.cleanHack();
  11. }

代码示例来源：origin: com.graphhopper/graphhopper

  1. boolean releaseSegment( int segNumber )
  2. {
  3.   ByteBuffer segment = segments.get(segNumber);
  4.   if (segment instanceof MappedByteBuffer)
  5.   {
  6.     ((MappedByteBuffer) segment).force();
  7.   }
  8.   Helper.cleanMappedByteBuffer(segment);
  9.   segments.set(segNumber, null);
  10.   Helper.cleanHack();
  11.   return true;
  12. }

代码示例来源：origin: com.rgi-corp/graphhopper

  1. boolean releaseSegment(int segNumber) {
  2.   ByteBuffer segment = segments.get(segNumber);
  3.   if (segment instanceof MappedByteBuffer) {
  4.     ((MappedByteBuffer) segment).force();
  5.   }
  6.   Helper.cleanMappedByteBuffer(segment);
  7.   segments.set(segNumber, null);
  8.   Helper.cleanHack();
  9.   return true;
  10. }

代码示例来源：origin: com.graphhopper/graphhopper-core

  1. @Override
  2. public void trimTo(long capacity) {
  3.   if (capacity < segmentSizeInBytes) {
  4.     capacity = segmentSizeInBytes;
  5.   }
  6.   int remainingSegNo = (int) (capacity / segmentSizeInBytes);
  7.   if (capacity % segmentSizeInBytes != 0) {
  8.     remainingSegNo++;
  9.   }
  10.   clean(remainingSegNo, segments.size());
  11.   Helper.cleanHack();
  12.   segments = new ArrayList<>(segments.subList(0, remainingSegNo));
  13.   try {
  14.     // windows does not allow changing the length of an open files
  15.     if (!Constants.WINDOWS) {
  16.       // reduce file size
  17.       raFile.setLength(HEADER_OFFSET + remainingSegNo * segmentSizeInBytes);
  18.     }
  19.   } catch (Exception ex) {
  20.     throw new RuntimeException(ex);
  21.   }
  22. }

代码示例来源：origin: com.graphhopper/graphhopper-core

  1. /**
  2.  * @param forceClean if true the clean hack (system.gc) will be executed and forces the system
  3.  *                   to cleanup the mmap resources. Set false if you need to close many MMapDataAccess objects.
  4.  */
  5. void close(boolean forceClean) {
  6.   clean(0, segments.size());
  7.   segments.clear();
  8.   Helper.close(raFile);
  9.   if (forceClean)
  10.     Helper.cleanHack();
  11. }

代码示例来源：origin: com.rgi-corp/graphhopper

  1. @Override
  2. public void trimTo(long capacity) {
  3.   if (capacity < segmentSizeInBytes) {
  4.     capacity = segmentSizeInBytes;
  5.   }
  6.   int remainingSegNo = (int) (capacity / segmentSizeInBytes);
  7.   if (capacity % segmentSizeInBytes != 0) {
  8.     remainingSegNo++;
  9.   }
  10.   clean(remainingSegNo, segments.size());
  11.   Helper.cleanHack();
  12.   segments = new ArrayList<ByteBuffer>(segments.subList(0, remainingSegNo));
  13.   try {
  14.     // windows does not allow changing the length of an open files
  15.     if (!Constants.WINDOWS) {
  16.       // reduce file size
  17.       raFile.setLength(HEADER_OFFSET + remainingSegNo * segmentSizeInBytes);
  18.     }
  19.   } catch (Exception ex) {
  20.     throw new RuntimeException(ex);
  21.   }
  22. }

代码示例来源：origin: com.rgi-corp/graphhopper

  1. @Override
  2. public void clear() {
  3.   // If there is at least one MMap DA then do not apply the cleanHack 
  4.   // for every single mmap DA as this is very slow if lots of DataAccess objects were collected 
  5.   // => forceClean == false
  6.   MMapDataAccess mmapDA = null;
  7.   for (DataAccess da : map.values()) {
  8.     if (da instanceof MMapDataAccess)
  9.       mmapDA = (MMapDataAccess) da;
  10.     removeDA(da, da.getName(), false);
  11.   }
  12.   if (mmapDA != null)
  13.     Helper.cleanHack();
  14.   map.clear();
  15. }

代码示例来源：origin: com.graphhopper/graphhopper-core

  1. ioex = tmpex;
  2. trial++;
  3. Helper.cleanHack();
  4. try {

代码示例来源：origin: com.graphhopper/graphhopper

  1. @Override
  2. public void clear()
  3. {
  4.   // If there is at least one MMap DA then do not apply the cleanHack 
  5.   // for every single mmap DA as this is very slow if lots of DataAccess objects were collected 
  6.   // => forceClean == false
  7.   MMapDataAccess mmapDA = null;
  8.   for (DataAccess da : map.values())
  9.   {
  10.     if (da instanceof MMapDataAccess)
  11.       mmapDA = (MMapDataAccess) da;
  12.     removeDA(da, da.getName(), false);
  13.   }
  14.   if (mmapDA != null)
  15.     Helper.cleanHack();
  16.   map.clear();
  17. }

代码示例来源：origin: com.graphhopper/graphhopper

  1. @Override
  2. public void trimTo( long capacity )
  3. {
  4.   if (capacity < segmentSizeInBytes)
  5.   {
  6.     capacity = segmentSizeInBytes;
  7.   }
  8.   int remainingSegNo = (int) (capacity / segmentSizeInBytes);
  9.   if (capacity % segmentSizeInBytes != 0)
  10.   {
  11.     remainingSegNo++;
  12.   }
  13.   clean(remainingSegNo, segments.size());
  14.   Helper.cleanHack();
  15.   segments = new ArrayList<ByteBuffer>(segments.subList(0, remainingSegNo));
  16.   try
  17.   {
  18.     // windows does not allow changing the length of an open files
  19.     if (!Constants.WINDOWS)
  20.     // reduce file size
  21.     {
  22.       raFile.setLength(HEADER_OFFSET + remainingSegNo * segmentSizeInBytes);
  23.     }
  24.   } catch (Exception ex)
  25.   {
  26.     throw new RuntimeException(ex);
  27.   }
  28. }

代码示例来源：origin: com.graphhopper/graphhopper-core

  1. @Override
  2. public void clear() {
  3.   // If there is at least one MMap DA then do not apply the cleanHack 
  4.   // for every single mmap DA as this is very slow if lots of DataAccess objects were collected 
  5.   // => forceClean == false
  6.   MMapDataAccess mmapDA = null;
  7.   for (DataAccess da : map.values()) {
  8.     if (da instanceof MMapDataAccess)
  9.       mmapDA = (MMapDataAccess) da;
  10.     removeDA(da, da.getName(), false);
  11.   }
  12.   if (mmapDA != null)
  13.     cleanHack();
  14.   map.clear();
  15. }

代码示例来源：origin: com.graphhopper/graphhopper

  1. Helper.cleanHack();
  2. try

代码示例来源：origin: com.rgi-corp/graphhopper

  1. ioex = tmpex;
  2. trial++;
  3. Helper.cleanHack();
  4. try {

代码示例来源：origin: com.rgi-corp/graphhopper

  1. newSegments = segmentsToMap;
  2.   clean(0, segments.size());
  3.   Helper.cleanHack();
  4.   segments.clear();
  5. } else {

代码示例来源：origin: com.graphhopper/graphhopper

  1. Helper.cleanHack();
  2.   segments.clear();
  3. } else

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