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Add logging for LZ4Factory instance type (#8341)

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Jonathan Wei 2019-08-20 15:24:53 -05:00 committed by GitHub
parent 5e35500e0e
commit e2a25fb51e
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1 changed files with 39 additions and 0 deletions
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39
processing/src/main/java/org/apache/druid/segment/data/CompressionStrategy.java
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@ -31,6 +31,7 @@ import org.apache.druid.collections.ResourceHolder;
import org.apache.druid.java.util.common.ByteBufferUtils;
import org.apache.druid.java.util.common.StringUtils;
import org.apache.druid.java.util.common.io.Closer;
import org.apache.druid.java.util.common.logger.Logger;
import org.apache.druid.segment.CompressedPools;
import java.io.IOException;
@ -105,6 +106,8 @@ public enum CompressionStrategy
throw new UnsupportedOperationException("NONE compression strategy shouldn't use any compressor");
}
};
private static final Logger LOG = new Logger(CompressionStrategy.class);
public static final CompressionStrategy DEFAULT_COMPRESSION_STRATEGY = LZ4;
final byte id;
@ -309,6 +312,10 @@ public enum CompressionStrategy
private static final LZ4Compressor defaultCompressor = new LZ4Compressor();
private static final net.jpountz.lz4.LZ4Compressor lz4High = LZ4Factory.fastestInstance().highCompressor();
static {
logLZ4State();
}
@Override
ByteBuffer allocateInBuffer(int inputSize, Closer closer)
{
@ -336,4 +343,36 @@ public enum CompressionStrategy
return out;
}
}
/**
* Logs info relating to whether LZ4 is using native or pure Java implementations
*/
private static void logLZ4State()
{
LOG.info("java.library.path: " + System.getProperty("java.library.path"));
LZ4Factory fastestInstance = LZ4Factory.fastestInstance();
try {
//noinspection ObjectEquality
if (fastestInstance == LZ4Factory.nativeInstance()) {
LOG.info("LZ4 compression is using native instance.");
}
}
catch (Throwable t) {
// getting an exception means we're not using the native instance
}
try {
//noinspection ObjectEquality
if (fastestInstance == LZ4Factory.unsafeInstance()) {
LOG.info("LZ4 compression is using unsafe instance.");
}
}
catch (Throwable t) {
// getting an exception means we're not using the unsafe instance
}
//noinspection ObjectEquality
if (fastestInstance == LZ4Factory.safeInstance()) {
LOG.info("LZ4 compression is using safe instance.");
}
}
}