Github user phrocker commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/140#discussion_r77162956
--- Diff:
core/src/main/java/org/apache/accumulo/core/file/rfile/bcfile/Compression.java
---
@@ -497,69 +513,66 @@ public CompressionCodec load(Entry<Algorithm,Integer>
key) {
public abstract boolean isSupported();
public Compressor getCompressor() throws IOException {
- CompressionCodec codec = getCodec();
- if (codec != null) {
- Compressor compressor = CodecPool.getCompressor(codec);
- if (compressor != null) {
- if (compressor.finished()) {
- // Somebody returns the compressor to CodecPool but is still
using
- // it.
- LOG.warn("Compressor obtained from CodecPool already
finished()");
- } else {
- LOG.debug("Got a compressor: " + compressor.hashCode());
- }
- /**
- * Following statement is necessary to get around bugs in 0.18
where a compressor is referenced after returned back to the codec pool.
- */
- compressor.reset();
- }
- return compressor;
- }
- return null;
+ return compressorFactory.getCompressor(this);
}
public void returnCompressor(Compressor compressor) {
- if (compressor != null) {
- LOG.debug("Return a compressor: " + compressor.hashCode());
- CodecPool.returnCompressor(compressor);
- }
+ compressorFactory.releaseCompressor(this, compressor);
}
public Decompressor getDecompressor() throws IOException {
- CompressionCodec codec = getCodec();
- if (codec != null) {
- Decompressor decompressor = CodecPool.getDecompressor(codec);
- if (decompressor != null) {
- if (decompressor.finished()) {
- // Somebody returns the decompressor to CodecPool but is still
using
- // it.
- LOG.warn("Decompressor obtained from CodecPool already
finished()");
- } else {
- LOG.debug("Got a decompressor: " + decompressor.hashCode());
- }
- /**
- * Following statement is necessary to get around bugs in 0.18
where a decompressor is referenced after returned back to the codec pool.
- */
- decompressor.reset();
- }
- return decompressor;
- }
-
- return null;
+ return compressorFactory.getDecompressor(this);
}
public void returnDecompressor(Decompressor decompressor) {
- if (decompressor != null) {
- LOG.debug("Returned a decompressor: " + decompressor.hashCode());
- CodecPool.returnDecompressor(decompressor);
- }
+ compressorFactory.releaseDecompressor(this, decompressor);
}
public String getName() {
return compressName;
}
}
+ /**
+ * Default implementation will create new compressors.
+ */
+ private static CompressorFactory compressorFactory = new
CompressorFactory(null);
+
+ /**
+ * Allow the compressor factory to be set within this Instance.
+ *
+ * @param compFactory
+ * incoming compressor factory to be used by all Algorithms
+ */
+ public static synchronized void setCompressionFactory(final
CompressorFactory compFactory) {
+ Preconditions.checkNotNull(compFactory, "Compressor Factory cannot be
null");
+ if (null != compressorFactory) {
+ compressorFactory.close();
+ }
+
+ compressorFactory = compFactory;
--- End diff --
Implementations close compressors if they don't own it. I realize the
fragility in making sure the release call closes the compressor/decompressor.
The alternative I imagined would return a status from release that shows us
whether or not the object was released. in that case Compression would call end
manually if the factory does not.
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