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Make RAMDirectory's touchFile method wait long enough for the system clock 

to register a new timestamp. This makes locking logic more robust.


git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@150065 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Dmitry Serebrennikov 2003-09-25 21:45:58 +00:00
parent 28ef35ee3e
commit 250f13e99c
1 changed files with 32 additions and 17 deletions
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49
src/java/org/apache/lucene/store/RAMDirectory.java
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@ -146,8 +146,23 @@ public final class RAMDirectory extends Directory {
/** Set the modified time of an existing file to now. */
public void touchFile(String name) throws IOException {
final boolean MONITOR = false;
int count = 0;
RAMFile file = (RAMFile)files.get(name);
file.lastModified = System.currentTimeMillis();
long ts2, ts1 = System.currentTimeMillis();
do {
try {
Thread.sleep(0, 1);
} catch (InterruptedException e) {}
ts2 = System.currentTimeMillis();
if (MONITOR) count ++;
} while(ts1 == ts2);
file.lastModified = ts2;
if (MONITOR)
System.out.println("SLEEP COUNT: " + count);
}
/** Returns the length in bytes of a file in the directory. */
@ -187,21 +202,21 @@ public final class RAMDirectory extends Directory {
*/
public final Lock makeLock(final String name) {
return new Lock() {
public boolean obtain() throws IOException {
synchronized (files) {
if (!fileExists(name)) {
createFile(name).close();
return true;
}
return false;
}
}
public void release() {
deleteFile(name);
}
public boolean isLocked() {
return fileExists(name);
}
public boolean obtain() throws IOException {
synchronized (files) {
if (!fileExists(name)) {
createFile(name).close();
return true;
}
return false;
}
}
public void release() {
deleteFile(name);
}
public boolean isLocked() {
return fileExists(name);
}
};
}
@ -274,7 +289,7 @@ final class RAMOutputStream extends OutputStream {
bytesToCopy = len - bytesToCopy; // remaining bytes
bufferNumber++;
if (bufferNumber == file.buffers.size())
file.buffers.addElement(new byte[OutputStream.BUFFER_SIZE]);
file.buffers.addElement(new byte[OutputStream.BUFFER_SIZE]);
buffer = (byte[])file.buffers.elementAt(bufferNumber);
System.arraycopy(src, srcOffset, buffer, 0, bytesToCopy);
}