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| java.lang.Object
 org.geotools.data.shapefile.Lock
| Lock | | public class Lock (Code) | | A read-write lock for shapefiles so that OS file locking exceptions will not
ruin an attempt to update a shapefile. On windows there are often operating
system locking conflicts when writing to a shapefile. In order to not have
exceptions thrown everytime a write is made, geotools has implemented file
locking for shapefiles.
author:
jeichar |
| Method Summary | |
| synchronized boolean | canRead()
| | synchronized boolean | canWrite()
| | synchronized int | getReadLocks(Thread thread)
| | public synchronized void | lockRead()
Called by shapefileReader before a read is started and before an IOStream
is openned. | | public synchronized void | lockWrite()
Called by ShapefileDataStore before a write is started and before an
IOStream is openned. | | synchronized boolean | ownWriteLock(Thread thread)
| | public synchronized void | unlockRead()
Called by ShapefileReader after a read is complete and after the IOStream
is closed. | | public synchronized void | unlockWrite()
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| owners | | Map owners(Code) | | Thread->Owner map. If empty no read locks exist.
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| writeLocks | | int writeLocks(Code) | | indicates a write is occurring
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| writer | | Thread writer(Code) | | if not null a writer is waiting for the lock or is writing.
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| canRead | | synchronized boolean canRead() throws IOException(Code) | | If the lock can be read locked the lock will be read and default
visibility for tests
throws:
IOException - |
| canWrite | | synchronized boolean canWrite() throws IOException(Code) | | If the lock can be read locked the lock will be read and default
visibility for tests
throws:
IOException - |
| getReadLocks | | synchronized int getReadLocks(Thread thread)(Code) | | default visibility for tests
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| lockRead | | public synchronized void lockRead() throws IOException(Code) | | Called by shapefileReader before a read is started and before an IOStream
is openned.
throws:
IOException - |
| lockWrite | | public synchronized void lockWrite() throws IOException(Code) | | Called by ShapefileDataStore before a write is started and before an
IOStream is openned.
throws:
IOException - |
| ownWriteLock | | synchronized boolean ownWriteLock(Thread thread)(Code) | | default visibility for tests
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| unlockRead | | public synchronized void unlockRead()(Code) | | Called by ShapefileReader after a read is complete and after the IOStream
is closed.
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| unlockWrite | | public synchronized void unlockWrite()(Code) | | |
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