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From olegz <...@git.apache.org>
Subject [GitHub] nifi pull request #980: NIFI-1170 - Improved TailFile processor to support m...
Date Fri, 09 Sep 2016 14:06:36 GMT
Github user olegz commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/980#discussion_r78185433
  
    --- Diff: nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/TailFile.java
---
    @@ -245,58 +490,82 @@ private void recoverState(final ProcessContext context, final Map<String,
String
                             + "this indicates that the file has rotated. Will begin tailing
current file from beginning.", new Object[]{existingTailFile.length(), position});
                 }
     
    -            state = new TailFileState(currentFilename, tailFile, reader, position, timestamp,
checksum, ByteBuffer.allocate(65536));
    +            states.get(filePath).setState(new TailFileState(filePath, tailFile, reader,
position, timestamp, length, checksum, ByteBuffer.allocate(65536)));
             } else {
    -            resetState(currentFilename);
    +            resetState(filePath);
             }
     
    -        getLogger().debug("Recovered state {}", new Object[]{state});
    +        getLogger().debug("Recovered state {}", new Object[]{states.get(filePath).getState()});
         }
     
    -    private void resetState(final String currentFilename) {
    -        expectedRecoveryChecksum = null;
    -        state = new TailFileState(currentFilename, null, null, 0L, 0L, null, ByteBuffer.allocate(65536));
    +    private void resetState(final String filePath) {
    +        states.get(filePath).setExpectedRecoveryChecksum(null);
    +        states.get(filePath).setState(new TailFileState(filePath, null, null, 0L, 0L,
0L, null, ByteBuffer.allocate(65536)));
         }
     
         @OnStopped
         public void cleanup() {
    -        final TailFileState state = this.state;
    -        if (state == null) {
    +        for (TailFileObject tfo : states.values()) {
    +            cleanReader(tfo);
    +            final TailFileState state = tfo.getState();
    +            tfo.setState(new TailFileState(state.getFilename(), state.getFile(), null,
state.getPosition(), state.getTimestamp(), state.getLength(), state.getChecksum(), state.getBuffer()));
    +        }
    +    }
    +
    +    private void cleanReader(TailFileObject tfo) {
    +        if (tfo.getState() == null) {
                 return;
             }
     
    -        final FileChannel reader = state.getReader();
    +        final FileChannel reader = tfo.getState().getReader();
             if (reader == null) {
                 return;
             }
     
             try {
                 reader.close();
    +            getLogger().debug("Closed FileChannel {}", new Object[]{reader});
             } catch (final IOException ioe) {
                 getLogger().warn("Failed to close file handle during cleanup");
             }
    -
    -        getLogger().debug("Closed FileChannel {}", new Object[]{reader});
    -
    -        this.state = new TailFileState(state.getFilename(), state.getFile(), null, state.getPosition(),
state.getTimestamp(), state.getChecksum(), state.getBuffer());
         }
     
         @Override
         public void onTrigger(final ProcessContext context, final ProcessSession session)
throws ProcessException {
    +        if(isMultiChanging.get()) {
    +            long timeSinceLastLookup = new Date().getTime() - lastLookup.get();
    +            if(timeSinceLastLookup > context.getProperty(LOOKUP_FREQUENCY).asTimePeriod(TimeUnit.MILLISECONDS))
{
    +                try {
    +                    recoverState(context);
    +                } catch (IOException e) {
    +                    getLogger().warn("Exception raised while looking up for new files",
e);
    --- End diff --
    
    Did you mean ```getLogger().error(..)```?



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